Post on 27-Oct-2014
transcript
© 2003 Panasonic Communications Co., Ltd. Allrights reserved. Unauthorized copying anddistribution is a violation of law.
KX-TC1488LBB900MHz Cordless PhoneBlack Version
(for Brazil)
Telephone Equipment
ORDER NO. KM40307154C3
1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 4
1.1. Suggested PbF Solder 4
1.2. Base Unit 5
1.3. Handset 9
2 FOR SERVICE TECHNICIANS 12
3 CAUTION 12
4 BATTERY 13
4.1. Installing the Battery in the Handset 13
4.2. Battery charge 13
4.3. Battery Recharge 13
4.4. Battery Information 13
4.5. Battery Replacement 14
5 LOCATION OF CONTROLS 15
5.1. Base unit 15
5.2. Handset 16
6 SETTINGS 17
6.1. Connections 17
6.2. Adding Another Phone 17
6.3. Display Language 18
6.4. Dialling Mode 18
6.5. Standby Mode (While the handset is off the base unit) 18
6.6. Ringer Volume 18
7 OPERATIONS 19
7.1. Making Calls 19
7.2. Answering Calls 20
7.3. Phone Book 21
8 DISASSEMBLY INSTRUCUTIONS 26
9 HOW TO REMOVE TEL JACK 28
10 TROUBLESHOOTING GUIDE 29
10.1. Check Power 30
10.2. Bell Reception 31
10.3. Check Battery Charge 32
10.4. Check Link 33
10.5. Check Handset Transmission 35
10.6. Check Handset Reception 35
11 ADJUSTMENTS (BASE UNIT) 36
11.1. Test Mode Flow Chart (Base Unit) 36
11.2. Adjustment 37
11.3. Adjustment Standard (Base Unit) 38
12 ADJUSTMENTS (HANDSET) 40
12.1. Test Mode Flow Chart (Handset) 40
12.2. Adjustment 41
12.3. Adjustment Standard (Handset) 42
13 FREQUENCY TABLE (MHz) 44
14 BLOCK DIAGRAM (BASE UNIT) 45
15 CIRCUIT OPERATION 46
15.1. Outline 46
15.2. Power Supply Circuit 46
15.3. Reset Circuit 47
15.4. Charge Circuit 48
15.5. Telephone Line Interface 49
15.6. Transmitter/Receiver 49
15.7. Calling Line ldentification Circuit (Caller ID) 50
15.8. Caller ID Detection 50
16 BLOCK DIAGRAM (HANDSET) 51
17 CIRCUIT OPERATION (HANDSET) 52
17.1. Outline 52
17.2. Reset Circuit/Charge Circuit 52
17.3. Battery Low / Power Down Detector 53
18 SIGNAL ROUTE 54
19 CPU DATA (BASE UNIT) 55
19.1. U1 55
19.2. U4 (DTMF CID IC) 56
19.3. Digital Security Coding System 56
20 CPU DATA (HANDSET) 57
20.1. U1 57
21 EXPLANATION OF IC TERMINALS (RF UNIT) 59
21.1. U1 59
22 HOW TO REPLACE A FLAT PACKAGE IC 60
22.1. Preparation 60
22.2. Procedure 60
22.3. Removing Solder from Between Pins 60
23 CABINET AND ELECTRICAL PARTS LOCATION (BASE UNIT)
61
24 CABINET AND ELECTRICAL PARTS LOCATION (HANDSET) 62
25 ACCESSORIES AND PACKING MATERIALS 63
26 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES
64
26.1. Base Unit 64
26.2. Handset 64
27 REPLACEMENT PARTS LIST 65
27.1. Base Unit 65
27.2. Handset 68
27.3. Accessories and Packing Materials 71
CONTENTS Page Page
2
KX-TC1488LBB
28 FOR SCHEMATIC DIAGRAM 72
28.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 72
28.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 72
28.3. Memo 73
29 SCHEMATIC DIAGRAM (BASE UNIT) 74
29.1. Main 74
29.2. RF Module 75
30 SCHEMATIC DIAGRAM (HANDSET) 76
30.1. Main 76
30.2. RF Module 77
30.3. Memo 78
31 CIRCUIT BOARD (BASE UNIT) 79
31.1. Main (Component View) 79
31.2. Main (Flow Solder Side View) 80
31.3. Locator (Component View) 81
31.4. Locator (Flow Solder Side View) 81
31.5. Memo 82
31.6. RF Module (Component View) 83
31.7. RF Module (Flow Solder Side View) 84
32 CIRCUIT BOARD (HANDSET) 85
32.1. Main (Component View) 85
32.2. Main (Flow Solder Side View) 86
32.3. RF Module (Component View) 87
32.4. RF Module (Flow Solder Side View) 88
3
KX-TC1488LBB
1 ABOUT LEAD FREE SOLDER (PbF: Pb free)Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder thatcontains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),Silver (Ag), and Copper (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repairwork we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.
Caution
· PbF solder has a melting point that is 50°F ~ 70°F (30°C ~ 40°C) higher than Pb solder. Please use a soldering iron withtemperature control and adjust it to 700°F ± 20°F (370°C ± 10°C). In case of using high temperature soldering iron, pleasebe careful not to heat too long.
· PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).
· If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possibleand be sure that any remaining is melted prior to applying the Pb solder.
· When applying PbF solder to double layered boards, please check the component side for excess which may flow onto theopposite side (See figure, below).
1.1. Suggested PbF SolderThere are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer’s specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
4
KX-TC1488LBB
1.2. Base Unit
1.2.1. Main
X1
Marked
PbF
(Component View)
5
KX-TC1488LBB
1.2.2. Locator
Marked
PbF
(Component View)
Marked
PbF
(Flow Solder Side View)
U1
Marked
PbF
(Flow Solder Side View)
Note:
The location of the “PbF“ mark is subject to change without notice.
Note:
The location of the “PbF“ mark is subject to change without notice.
6
KX-TC1488LBB
1.2.3. RF Module
U1
Marked
PbF
(Component View)
7
KX-TC1488LBB
PbFMarked
(Flow Solder Side View)
Note:
The location of the “PbF“ mark is subject to change without notice.
8
KX-TC1488LBB
1.3. Handset
1.3.1. Main
U1
Marked PbF
(Component View)
9
KX-TC1488LBB
LCD1
Marked PbF
(Flow Solder Side View)
Note:
The location of the “PbF“ mark is subject to change without notice.
10
KX-TC1488LBB
1.3.2. RF Module
U1
Marked PbF
(Component View)
11
KX-TC1488LBB
PbF
RA16A
Marked
(Flow Solder Side View)
Note:
The location of the “PbF“ mark is subject to change without notice.
2 FOR SERVICE TECHNICIANSICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover the plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch IC or LSI pins with bare fingers.
3 CAUTIONDanger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommendenced by themanufacturer.
Dispose of used batteries according to the manufacture’s Instructions.
12
KX-TC1488LBB
4 BATTERY4.1. Installing the Battery in the Handset
4.2. Battery charge
4.3. Battery Recharge
4.4. Battery Information
13
KX-TC1488LBB
4.5. Battery Replacement
14
KX-TC1488LBB
5 LOCATION OF CONTROLS5.1. Base unit
15
KX-TC1488LBB
5.2. Handset
16
KX-TC1488LBB
6 SETTINGS6.1. Connections
· Use only with Panasonic AC Adaptor PQWATC1468LB.
· The AC adaptor must remain connected at all times. (It is normal for the adaptor to feel warm during use.)
· If your unit is connected to a PBX which does not support Caller ID services, you cannot access those services.
6.2. Adding Another PhoneThis unit will not function during a power failure. To connect a standard telephone on the same line, use a T-adaptor.
17
KX-TC1488LBB
6.3. Display Language
6.4. Dialling Mode
6.5. Standby Mode (While the handset is off the base unit)
6.6. Ringer Volume
18
KX-TC1488LBB
7 OPERATIONS
7.1. Making Calls
19
KX-TC1488LBB
7.2. Answering Calls
20
KX-TC1488LBB
7.3.1. Storing Names and Numbers
7.3. Phone Book
21
KX-TC1488LBB
7.3.2. Entering Names and Symbols
22
KX-TC1488LBB
7.3.3. Finding Stored Items
7.3.4. Dialing
23
KX-TC1488LBB
7.3.5. Editing
24
KX-TC1488LBB
7.3.6. Erasing
25
KX-TC1488LBB
8 DISASSEMBLY INSTRUCUTIONS
Show in Fig. To remove. Remove.1 Lower Cabinet Screws (2.6 × 8)................. ...... (A) × 42 Locator P.C.Board Screws (2.3 × 6)................. ...... (B) × 4
Locator P.C.Board3 RF P.C.Board Screws (2 × 6)................. ...... (C) × 3
RF P.C.Board4 Main P.C.Board Screws (2.3 × 6)................. ...... (D) × 4
Main P.C.Board
26
KX-TC1488LBB
Show in Fig. To remove. Remove.5
Rear CabinetBattery compartment cover.
6 Screws (2.6 × 8)................. .....(E) × 278 Antenna Screw (2.6 × 8)................. .....(F) × 1
RF P.C.Board Screws (2 × 6)................. .....(G) × 2RF P. C. Board.
9 Main P.C.Board Screws (2 × 6)................. .....(H) × 2Main P.C.Board
27
KX-TC1488LBB
9 HOW TO REMOVE TEL JACK 1. Keep 2 hooks for TEL JACK fixing open in the direction of arrow 1, then pull the top of TEL JACK forward as shown arrow 2
until the hooks click. (Refer to Fig. 1 .)
2. Remove TEL JACK pulling just above in the direction of arrow 3. (Refer to Fig. 2 .)
28
KX-TC1488LBB
10 TROUBLESHOOTING GUIDE
Cross Reference:
Check Power (P.30)
Check Battery Charge (P.32)
Check Link (P.33)
Check Handset Transmission (P.35)
Check Handset Reception (P.35)
Bell Reception (P.31)
29
KX-TC1488LBB
Cross Reference:
Reset Circuit (P.47)
Power Supply Circuit (P.46)
** : Connections (P.17)
Cross Reference:
Charge Circuit (P.48)
Note:
CPU: U1
Note:
CPU: U1
10.1. Check Power
* : Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.79) or CIRCUIT BOARD (HANDSET) (P.85)
30
KX-TC1488LBB
Cross Reference:
Telephone Line Interface (P.49)
Note:
CPU : U1
10.2. Bell Reception
* : Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.79) or CIRCUIT BOARD (HANDSET) (P.85)
31
KX-TC1488LBB
Cross Reference:
Charge Circuit (P.48)
Power Supply Circuit (P.46)
** : Connections (P.17)
Cross Reference:
Reset Circuit/Charge Circuit (P.52)
Note:
CPU: U1
Note:
CPU: U1
10.3. Check Battery Charge
*: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.79) or CIRCUIT BOARD (HANDSET) (P.85)
32
KX-TC1488LBB
**: Refer to Adjustment (P.37) Note:
CPU: U1
RF IC: U1
10.4. Check Link
33
KX-TC1488LBB
**: Refer to Adjustment (P.41). Note:
CPU: U1
RF IC: U1
*: Each measurement points are shown in CIRCUIT BOARD (BASE UNIT) (P.79) or CIRCUIT BOARD (HANDSET) (P.85)
*: Each measurement points are shown in RF Module (Component View) (P.87)
34
KX-TC1488LBB
10.5. Check Handset Transmission
Cross Reference:
SIGNAL ROUTE (P.54)
10.6. Check Handset Reception
Cross Reference:
SIGNAL ROUTE (P.54)
35
KX-TC1488LBB
11 ADJUSTMENTS (BASE UNIT)If your unit have below symptoms, adjust or confirm each item using remedy column from the table.
Symptom Remedy*The base unit dose not respond to a call from handset. Make adjustments in item (A)The base unit dose not transmit or the transmit frequency is off. Make adjustments in item (B)The transmit frequency is off. Make confirmation in item (C)The transmit power output is low, and the operating distance between the base unit andthe handset is less than normal.
Make confirmation in item (D)
The reception sensitivity of base unit is low with noise. Make confirmation in item (E)The transmit level is high or low. Make confirmation in item (F)The reception level is high or low. Make adjustments in item (G)The unit does not link. Make confirmation in item (H), (I)
*: Refer to Adjustment (P.37).
11.1. Test Mode Flow Chart (Base Unit)The operation-flow of Test mode and main check items are shown below.
36
KX-TC1488LBB
11.2. AdjustmentAdjustment Items Test Mode Adjustment
Point*Procedure Check or
ReplaceParts
(A) RX VCO CH1 Talk L502 · Adjust L502 so that the reading of the Digital Voltmeter is 1.75V ± 0.2V.(at TP808)
U1, L502,VD501
(B) TX VCO CH1 Talk L503 · Adjust L503 so that the reading of the Digital Voltmeter is 1.8V ± 0.15V.(at TP809)
U1,VD502,
L503(C) TX Frequency CH1 Talk VC1 · Adjustment VC1 so that the reading of the frequency counter is 1ch Freq.
(902.1MHz) ± 9KHz at the antenna.U1,
U2, X2(D) TX Power
ConfirmationCH1 Talk T5 · Confirm so that the reading of the RF VTVM is -7 ± 2dBm. (at TP510) U1, Q509,
Q510,FL501,L503
(E) RX SensitivityConfirmation
CH1 Talk - 1. Apply -107dBm output from S.S.G. (modulation frequency 1KHz, dev.0KHz).
2. Confirm that the distortion reading of Audio Analyzer is less than 25%.
FL501,CF501,
U1
(F) Line Output LevelConfirmation
CH1 Talk - 1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev.25KHz).
2. Confirm that the reading of Audio Analyzer is -22 ± 1dBm (600Ω load).
U3,U1
(G) Line InputModulationConfirmation
CH1 Talk - 1. Input via loop simulator 1.0KHz, -16dBm (measured at T-R) signal.
2. Confirm so that the reading of FM Deviation Meter is 25KHz ± 1KHz.
U1, VD502
(H) RSSI Confirmation RSSI - Hold the “Locator” key for 5 seconds to enter to RSSI test. 1. Measure the SSG output level when the SIG_OUT changes from Low to
High.
2. Confirm that the SSG output level is -70+10/-15dBm.
U1, FL501
(I) DataModulationconfirmation
TX Data - · Confirm for 60 ± 15/-10KHz FM Deviation Meter reading U1*,VD502
The connection of adjustment equipment are as shown in Adjustment Standard (Base Unit) (P.38).
SSG Frequency: 925.9 MHz
U1: RF_IC
U1*: CPU
37
KX-TC1488LBB
11.3. Adjustment Standard (Base Unit)(Main, Flow Solder Side View)
U1
U3
PbF
AF OSC
LOOPSIMULATOR
Audio Analyzer
(E) (F)
Tip
RingD1Q3
C7C20
C63
R28
R59C16C34C99C65
R55
R7
JR4
R15JR5
JR12
R68R109
R111C52
CAS
ATE
CAS_ATT
EC3
R18
R11
C3
R11
4R12
R65
R66R67
R60TP4
TP1TP3
JR3R77
D4
R64
C46
C68D4
2322
11
C22
C8C6R27
Q5
R73
Q2
Q6
Q7
Q4
Q10
Q8
C2
R26
R108
R17D11
C42R76
C12
U2
R9
R30
+5V AC3C60
TP2
R107
R24
C14
C28R22
R41 R40
C35
C1
R43
AC4
AC2
R42 R8
C19
C74
C55
C64
C56
R51
R72
R48C67
C30
R95
C97
R96
JR11
R94
JR8
R2
R78
R92
C62C
54
R34R
21R
23
R46
R10
4 R10
3R
105
C49
C23
C24
C15
C25
C57
C4R63
R10
0
R98
41
R58
R61
R86
R57
R54 R
70
C66
C41
R85
R11
7R
110
R116
R12
5
R12
3R
52
R12
1JR
2
R12
4R
19
R13 D
3R
102
R71
R38
R10
1C
48C
40 R99
C51
C5
C43C
44C
50
R80
R37
R83
R93
R35
R36
R39
R4
R11
5
R69
R91
R53
R82R
6 AR
6
R3R
113
C73
C47
C27 C
13
C58
R87
C18
R81
R88
R14
7
R15
0 R12
0
R11
8
R11
2
R14
C59
R16
R20
C39
C33
C38
R75
D2
C29
D6
R5
AR
5R
106
C26
R32 R
31
R25
C31
R84
R29
R62
C61
D7 D8
D9
D10
C21C9
38
KX-TC1488LBB
(RF Module, Component View)
R517
R551R514
R511
R513
R536
C574 C575
C595
C555
R585
C583
C538
C57
0C
500
R51
0
R52
4R
522
R54
3R
518
R54
4R59
3
R50
9
R60
4
R4
R13
R10
R8 R61
1R
606
R512
R7
R609
R531
R504
R520
R534
R533
R537
R9
R610
R578
R62
1
R619
C530
C20
C593C592
C545
C598
C591
L503
L506C4
R571
C559
C556C560
C562
C586
C567
C557
C12C535
C533
C22C25 C605
CF501
C563
C23
U1
C502
C8
C31C37
C32R5R3
C39
T1
C28
P3
C38
C6R12
R11R18
R1
R21
C21C16
D1
R30R31 15 10 5 1
ESC8ESC7
R19
C7
C33R17
R20
C34C13
C3C35C36
R15
C30
C29 C24
C604
L504
R503 R6
R521
R562
R561
R577C568
Q555
Q556
Q506
Q512
R56
9
R50
1
C57
8
C54
6
C50
3C
582
FL5
01
C59
7
C54
2
C60
0
C56
5
C51
9
C56
4C
566
C60
2
Q50
9
L502
L505
VD
501
VD
502 C
590
C59
9
C54
9C
534
C57
3
C56
9
C52
6
C56
1
C50
4C
543
C54
1
C53
7
C55
4 C53
9C
536
C15
R622
R11
1
EC
2
D2
C14
C19
C11
C2
R16
EC
1
C17
C18
F1
C9 C10
C5
C40
C55
8
R2
C50
5
ES
C10
C41
C57
2C
527 Q510
C521
C571C1 R541
(H)
Oscillo scope
SIG_OUT
GND
TP809(TXVCO)
D.M.
(B) TP808 (RXVCO)
D.M.
(A)
FM Deviation Meter (G), (I)
Frequency Counter (C)SSG
925.9MHz
Spectrum Analyzer (D)
PbF
39
KX-TC1488LBB
12 ADJUSTMENTS (HANDSET)If your unit have below symptoms, adjust or confirm each item using remedy column from the table.
Symptom Remedy*The handset does not respond to a call from the base unit. Make adjustments in item (A)The handset does not transmit or the transmit frequency is off. Make adjustments in item (B)The transmit frequency is off. Make confirmation in item (C)The transmit power output is low, and the operating distance between the base unit andthe Handset is less than normal.
Make confirmation in item (D)
The reception sensitivity of handset is low with noise. Make confirmation item (E)Does not link between the base unit and the handset. Make confirmation in item (F)The reception level is high or low. Make confirmation item (G)The transmit level is high or low. Make adjustments in item (H)
*: Refer to Adjustment (P.41).
Unit condition:
1. Remove the antenna lead wire from P.C Board of the handset.
2. Power Supply: DC 3.9V (DC power supply)
3. Speaker Load: 150Ω
CH TX Frequency RX Frequency VolumeCH1 925.9MHz 902.1MHz 2
12.1. Test Mode Flow Chart (Handset)
Note:
Refet to CIRCUIT BOARD (HANDSET) (P.85)
SIGNAL ROUTE (P.54)
40
KX-TC1488LBB
12.2. AdjustmentAdjustment Items Test Mode Adjustment
PointProcedure Check or
ReplaceParts
(A) TX VCO Talk L503 1. Adjust L503 so that the reading of the Digital Voltmeter is 1.80V ± 0.15V.(at TP809)
U1, L503,VD502
(B) RX VCO Talk L502 1. Adjust L502 so that the reading of the Digital Voltmeter is 1.75V ± 0.2V.
(at TP808)
U1, L502,VD501
(C) TX FrequencyAdjustment
Talk VC1 · Adjust VC1 so that the reading of the frequency counter is 925.9MHz ±9KHz.
U1
(D) TX PowerConfirmation
Talk - · Output level should be over -4 ± 2dBm on RF VTVM (50Ω load). (atTP510)
U1, Q509,Q510,FL501,L503
(E) RX SensitivityConfirmation(SP out)
Talk - 1. Apply -107dBm output from S.S.G. (modulation frequency 1KHz, dev.25KHz).
2. Confirm that the distortion reading of Audio Analyzer is less than 25%.
FL501,CF501, U1
(F) RSSI Confirmation Talk - 1. Measure the SSG output level when the SIG_OUT changes from Low toHigh. (modulation frequency 1KHz, dev.25kHz)
2. Confirm that the SSG output level is -70 ± 15dBm.
U1, FL501
(G) SpeakerOutput Levelconfirmation
Talk - 1. Apply -47dBm output from S.S.G. (modulation frequency 1KHz, dev.25KHz).
2. Confirm that SP output level is 75 ± 10mVrms.
U1
(H) Mic ModulationFactor
Talk VR1 1. Apply a MIC signal (1KHz, 3.8mVrms).
2. Adjust so that the reading FM Deviation Meter is 25kHz ± 1KHz.
U1, VD502
(I) DataModulationConfirmation
Tx Data - · Confirm for 70kHz ± 10KHz FM Deviation Meter reading. U1, U1*
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.42).
SSG Frequency: 902.1 MHz
U1: RF_IC
U1*: CPU
41
KX-TC1488LBB
12.3. Adjustment Standard (Handset)(Main, component View)
DC Power Supply
PbF
C24
C2
L2
ZD2
R58
GND
MIC_I/P
BATT
C13
R55
L1
Q5
U3AAQ9
U2
U3
U3A
C17
C30VCC
R37
C34
C110
C1
D2
81 50
31
30
80
C4
WJ1
51
U1
1001
C9
R45R66
R38
R21
D4
C28
C27
Q10
R41R75
R30R60
R44R46R28
R62R51
R29R61
R40Q2
7 1
Q6Q1
SPK
R79D1
R19 R18
R78
R4
R49R26
C60
R42
R67
R54
R24
C15
R11R88
C14
Q3 R65
R7
X2
R2
Q7
ATE
Q8
Q4 SW1
R8R1
CON215
C31
BATT+
C10
2C
10 R5
R6
C7
C5
R92
C26
EC
3
EC
5E
C2
EC
5AE
C2A
EC
3A
C29
C3
C22
R25
C33
C18
C32
C36 C
35V
C1
C8
C38
C20
C23
C37
C21
R33 C
16
ZD
3
C64
D10
D8
D11
D9 D
3
C11
C10
3R
59
C25
R3
C12
C19
R57
R47
C39
Q12
OF
FO
N
BU
ZZ
LED
(+
)LE
D (
-)
R80
R81
R64
R14
R13
R91R
90
C6
D15
R35
R32
R48
R53
R31
R16
R12
R15
R52
R68
R89
R23
R20
R76
R9
C10
0
42
KX-TC1488LBB
(RF Module, Component View)
R517
R551R514
R511
R513
R536
C574 C575
C595
C555
R585
C583
C538
C57
0
C50
0
R51
0
R52
4R
522
R54
3
R51
8
R54
4
R59
3 R50
9
R60
4
R14
R4
R13
R10
R8
R61
1R
606
R512
R7
R609
R531
R504
R520
R534
R533
R537
R9
R610
R578
R621R5VR1
R31
R619
R30
C530
C20
C593C592
C545
C598
C591
L503
L506
C4
R571
C559
C556C560
C562
C586
C567
C557C12
EC1
C535
C533
C16
C22C25 C605
CF501
C563
C23
U1
C502
C8
C31
C37
C32R5A
R3
C39
T1
C28
P3
C38
C6R12
R11R18
R1
R21
C21
16 10 5 1
ESC8 ESC7
R19
C7
C33R17
C34
C13
C3
C35C36
R15
C30
C29C24
C604
L504
R503 R6
R521
R562
R561
R577C568
Q555
Q556
Q506
Q512
R56
9
R50
1
C57
8 FL5
01
C54
6
C50
3C
582
C59
7
C54
2
C60
0
C56
5
C51
9C
564
C56
6
C60
2
Q50
9
L502
L505
VD
501
VD
502
C59
0C
599
C54
9C
534
C57
3
C56
9
C52
6
C56
1
C50
4C
543
C54
1
C53
7
C55
4
C53
9
C53
6
C15
R62
2
R11
1
EC
2C
14
C19
C11
C2
R16
C17
C18
F1
C9 C10
C5
C40
C55
8
R2
C50
5
ES
C10
C41
C57
2C
527 Q
510
C521
C571C1 R541
TP809(TXVCO)
D.M.
(A)
Audio Analyzer Oscillo scope AF GeneratorGND
SIG_OUT
MIC_IN
(E) (G)
TP808 (RXVCO)
D.M.
(B)
TP510
FM Deviation Meter (H), (I)
Spectrum Analyzer (D)
Frequency Counter (C)
PbF
902.1MHz
SSG
43
KX-TC1488LBB
13 FREQUENCY TABLE (MHz)BASE UNIT HANDSET
Channel Transmit Frequency Receive Frequency Transmit Frequency Receive Frequency1 902.10 925.90 925.90 902.102 902.15 925.95 925.95 902.153 902.20 926.00 926.00 902.204 902.25 926.05 926.05 902.255 902.30 926.10 926.10 902.306 902.35 926.15 926.15 902.357 902.40 926.20 926.20 902.408 902.45 926.25 926.25 902.459 902.50 926.30 926.30 902.50
10 902.55 926.35 926.35 902.5511 902.60 926.40 926.40 902.6012 902.65 926.45 926.45 902.6513 902.70 926.50 926.50 902.7014 902.75 926.55 926.55 902.7515 902.80 926.60 926.60 902.8016 902.85 926.65 926.65 902.8517 902.90 926.70 926.70 902.9018 902.95 926.75 926.75 902.9519 903.00 926.80 926.80 903.0020 903.05 926.85 926.85 903.0521 903.10 926.90 926.90 903.1022 903.15 926.95 926.95 903.1523 903.20 927.00 927.00 903.2024 903.25 927.05 927.05 903.2525 903.30 927.10 927.10 903.3026 903.35 927.15 927.15 903.3527 903.40 927.20 927.20 903.4028 903.45 927.25 927.25 903.4529 903.50 927.30 927.30 903.5030 903.55 927.35 927.35 903.5531 903.60 927.40 927.40 903.6032 903.65 927.45 927.45 903.6533 903.70 927.50 927.50 903.7034 903.75 927.55 927.55 903.7535 903.80 927.60 927.60 903.8036 903.85 927.65 927.65 903.8537 903.90 927.70 927.70 903.9038 903.95 927.75 927.75 903.9539 904.00 927.80 927.80 904.0040 904.05 927.85 927.85 904.05
44
KX-TC1488LBB
14 B
LOC
KD
IAG
RA
M(B
AS
EU
NIT
)
468.
3~46
9.27
5 M
Hz
451.
05~
452.
025
MH
z
RE
CR
AD
LE
LNA
Q55
5,Q
556
92X
.XX
MH
z
DU
PLE
XF
L501
90X
.XX
MH
z
MIX
ER
Q51
210
.7M
Hz
X2
RX
VC
0Q
506
LPF
LPF
TX
_DAT
A
10.7
MH
z
+5V
TX
_VC
C
RX
_VC
CD
ET
EX
PIF
AM
P2
AM
P1
IF
RX
PLL
CO
MP
LPF
BU
FF
ER
Q51
0X
2T
XV
C0
Q50
9
4.0M
Hz
TX
PLL
OS
C
RE
S, S
ELE
CTO
R
DT
MF
SID
ETO
NE
MU
TE
CIR
CU
ITE
DT
MF
AD
JUS
TIN
GC
IRC
UIT
RE
S. S
ELE
CTO
R
DT
MF
RS
SI
RX
_DAT
A
DAT
A
ST
B
CLK
CH
G_D
ET
TX
PW
R_C
TL
CH
G_O
PT
ION
PO
WE
R S
UP
LY P
AR
T
DC
+
DC
-
TX
_DAT
A
CH
R+
CH
R-
RE
CR
AD
LEC
HG
_OP
TIO
N
TR
ICK
LE C
HG
RE
S.
CH
AR
GE
DE
TE
CTO
RC
HG
_DE
T
RX
_VC
C
TX
_VC
C
TX
PW
R_C
TL
VO
LTA
GE
CO
NS
TAN
TC
IRC
UIT
+9V
DIN
DO
UT D
TM
F D
EC
OD
ER
GS
IN-
IN+
IND
TM
F4
IND
TM
F1
IND
TM
F2
IND
TM
F3
OS
C1
VR
EF
VD
D
ST
D
+5V
VD
DA
VD
D
3.57
9MH
z
RE
SE
T C
IRC
UIT
RE
SE
T
VR
EF
INP
INN
FS
K S
IGN
AL
CH
AN
NE
L
+5V
CA
LLE
R ID
DE
TE
CTO
R E
XT.
CIR
CU
IT
Rin
g D
etec
tor
RIN
G_D
ET
LNS
EIZ
E
DIN
DO
UT
RIN
G
TIP
Pos
isto
r
VA
RIS
TOR
RE
ED
RE
LAY
SIDETONECANCEL
TO A
DC
CF
501
(RF
IC)
U1
(CP
U)
U1
U4
KX
-TC
1488
LBB
: BLO
CK
DIA
GR
AM
(B
AS
E U
NIT
)
KX-TC1488LBB
45
15 CIRCUIT OPERATION15.1. Outline
Base unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.45).
· CPU: U1
− − − − Controlling the whole system
− − − − Forming/analyzing all data signals (ACK, CMD signal etc.)
− − − − All interfaces (ex: LED, KEY, Detector Circuit (Charge/ Power Down)
− − − − DTMF Generator
− − − − FSK Caller ID Receiver
· RF IC: U1
− − − − PLL Oscillator
− − − − Compress/ Expander
− − − − Amplifier for transmission and reception
· DTMF Caller ID Receiver: U4
− − − − Filter
− − − − DTMF tone detector and decoder
· Additionally
− − − − Power Supply Circuit
− − − − Reset Circuit
− − − − Charge Circuit
− − − − Telephone Line Interface Circuit
15.2. Power Supply CircuitThe power supply to the CPU (Digital, Analog) and RF IC from AC Adaptor (+9V) as shown in diagram in Reset Circuit (P.47).
46
KX-TC1488LBB
15.3. Reset CircuitAfter power supply from AC adaptor, the VDD (5.0V) is input to Q6, Q7 for making reset signal. Refer to the below waveform.
<Fig. 101>
<Fig. 102>
47
KX-TC1488LBB
15.4. Charge CircuitCircuit Operation:
When charging the handset on the base unit, the charge current is as follows;
DC+(9V) → L1 → CHG (Base) → [CHG1 (Handset) → D8 → BAT1....Battery....BAT2 (GND) → D3 → D9 → CHG2 (Handset)]
In this way, the CPU on both unit detects the fact that the battery is charged.
<Fig. 103>
Trickle charge mode: Q5 OFF
Normal charge mode: Q5 ON
48
KX-TC1488LBB
15.5. Telephone Line InterfaceFunction:
· Bell signal detection
· ON/OFF hook and pulse dial circuit
· Side tone circuit
Bell signal detection and OFF HOOK circuit:
In the idle mode, Q3 is open to cut the DC loop current and decrease the ring load. When ring voltage appears at the Tip (T)
and Ring (R) leads (When the telephone rings), the AC ring voltage is transferred as follows:
T → L9 → C37 → R44 → U3-A, B → CPU (Ring DET). [BELL ]
When the CPU(IC3) detects a ring signal and press the TALK Key onto the handset. Q3 turns on, thus providing an off-hook
condition (active DC current flow through the circuit) and the following signal flow is for the loop current.
T → L9 → T4 → RLY1 → L10 → F1 → R [OFF HOOK]
ON HOOK Circuit:
Q3 is open, Q3 connected as to cut the DC loop current via RLY1 and to cut the voice signal. The unit is consequently in an
on-hook condition.
Pulse Dial Circuit:
CPU (LSEIZE) turns Q3 ON/OFF to make the pulse dialing via RLY1.
Side Tone Circuit:
Basically this circuit prevents the TX signal from feeding back to RX signal.
As for this unit, TX signal feed back from U3 is canceled by AC3 and so on.
15.6. Transmitter/ReceiverBase Unit and Handset are mainly consists of RF (Radio Frequency) IC(U1) and CPU(U1).
Base Unit and Handset transmit/receive voice signal and data signal through the antenna on carrier frequency.
Signal Pass:
*Refer to CDL TX/RX in SIGNAL ROUTE (P.54).
15.6.1. Transmitter Block
Circuit Operation:
The voice signal input from the TEL LINE interface goes to RF IC(U1) as shown in
BLOCK DIAGRAM (BASE UNIT) (P.45).
And the signal goes through the compressor and SPLATTER FILTER of RF IC, it is output to transmitter circuit.
The signal of the data sent to the handset is applied too.
The capacitor of VARICAP (:VD502) is changing in accordance with the voice signal from telephone line interface or TX DATAsignal from CPU. Therefore, the carrier frequency which is generated by TXVCO will be changing, and Frequency modulatedRF signal is generated and amplified by RF AMP (Doubler: Q510). It pass through the Duplexer FL501 and radiated fromAntenna.
Handset detects the voice signal or data signal in the circuit same as the following explanation of Receiver Block.
15.6.2. Receiver Block
Circuit Operation:
The signal of 900MHz band (925.9~927.85MHz) which is input from ANT is filtered at FL501 as shown in BLOCK DIAGRAM(BASE UNIT) (P.45), then it is input to RF IC.
The signal input to RF IC is converted through Mixer, IF filter (CF501) and Expander.
In short 1st local frequency is mixed with the received RF signal. Then it passes through IF (CF501: 10.7 MHz IntermidiateFrequency) and filtered at F1.
The detected signal passes through the expander and Amplifier inside of RF IC to the TEL LINE interface.
RX data (from Handset):
The data signal from handset (ex: Talk, ACK, COM) is also included in 900 MHz band same as the voice data. After secondif filter, the data signal is made square shape by data limiting AMP of the RF IC. RX data is output to CPU (RX Data).
49
KX-TC1488LBB
15.7. Calling Line ldentification Circuit (Caller ID)Function:
The caller ID is a chargeable ID which the user of a telephone circuit obtains by entering a contract with the telephone companyto utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has beenentered for the circuit being used.
The Caller-ID data from exchange is supplied to the telephone using either method of FSK or DTMF. The method is chosenaccording to the exchange of telephone office. This unit is available to receive the data with both methods and displays thereceived data on LCD.
· FSK (Frequency Shift Keying) format
<Fig. 104>
· DTMF format
It is the method to send the telephone number of calling party with DTMF to the telephone. DTMF is sent before the first bellsignal.
The data is sent in turn; first the start code, secondly the telephone number of calling party, lastly end code.
The DTMF is chosen from A(1633Hz and 697Hz), B(1633Hz and 770Hz), C(1633Hz and 852Hz) and D(1633Hz and 941Hz) asthe start code and end code according to the exchange.
<Fig. 105>
15.8. Caller ID Detection · FSK
U1 is an CPU and a Caller ID detector IC in one. The Caller ID part is capable of detecting FSK CID type 1. During type 1 CID,this IC is interfaced at telephone line through 1000pF/2KV capacitors C10 & C11. All decoded data are then sent to the Handsetfor storage and display.
· DTMF
U4 dose all the jobs for DTMF caller ID decoding. It is a complete receiver integrated both the band split and digital decoderfunctions. Coupled to the line interface through C45 & C53, the decoded DTMF signal is processed and sent to the CPU (U1)through four parallel data ports. Similar to the process of FSK memory storage, all decoded data are sent to the Handset forstorage and display.
Signal Pass :
Refer to SIGNAL ROUTE (P.54).
Depending on the areas, Startcode and Endcode cannot be input.
50
KX-TC1488LBB
16 B
LOC
KD
IAG
RA
M(H
AN
DS
ET
)
LNA
RX
Q51
0
X2
TX
_DAT
A
LPF
BU
FF
ER
92X
.XX
MH
z
DU
PLE
X
Q55
5,Q
556
90X
.XX
MH
z
10.7
MH
z
Q50
9V
CO
TX
X2
445.
7~44
6.67
5 M
Hz
Q50
6V
CO
CO
MP
OS
C
PLLTX
RX
OS
C
LPF
LPF
462.
95~
463.
925
MH
z
10.7
MH
z
DE
T
MU
TE
HA
LF
IF A
MP
1
PLL
IF A
MP
2E
XP
RX
_VC
C
TX
_VC
C
BAT
T+
PD
_OU
T
CLK
ST
B
DAT
A
RX
_DAT
AB
AT_A
L
RS
SI
SE
G &
CO
M
TX
_DAT
A
PW
R_D
WN
TX
_PW
R
RX
_PW
R
3.3V
BA
CK
LIG
HT
BU
ZZ
ER
FLA
SH
TIM
E S
ELE
CT
300m
s
600m
s
3.3V
BAT
T+
2KX
8 bi
t
24C
16
EE
PC
LK
DAT
A
ED
ITA
UTO
/PR
OG
OF
F
RE
DIA
L/PA
US
E
MU
TE
/CLE
AR
CH
/FU
NC
TIO
N
TALK
/FLA
SH
84
UP
DO
WN
#7 0
*6951
23
RE
SE
T
OS
C
RE
SE
T C
IRC
UIT
4 M
Hz
XO
UT
XIN
LCD
RX
_PW
R
RX
_VC
C
TX
_VC
C
TX
_PW
R
PO
WE
R S
UP
PLY
PW
R_D
WN
TK
7153
3AS
VC
C
3.3V
VC
CB
ATT
+
Q51
2M
IXE
R
(RF
IC)
U1
(CP
U)
U1
KX
-TC
1488
LBB
: BLO
CK
DIA
GR
AM
(H
AN
DS
ET
)
U2
U3
KX-TC1488LBB
51
17 CIRCUIT OPERATION (HANDSET)17.1. Outline
Handset consist of the following ICs as shown in BLOCK DIAGRAM (HANDSET) (P.51).
· CPU: U1
− − − − All data signals (forming/analyzing ACK or CMD signal*)
− − − − All interfaces (ex; LED, Key, Buzzer, Detector Circuit, Charge, Battery Low)
− − − − RAM for keeping the data (CH Number, ID Code, etc.)
− − − − LCD driver/controller
· RF IC: IC1
− − − − PLL Oscillator
− − − − Compress/Expander
− − − − Amplifier for transmission and reception
· EEPROM: U2
− − − − Store Caller ID list and phone book
17.2. Reset Circuit/Charge CircuitThe power of handset is supplied by battery.
Whenever the battery is recharged, the impulse at CHG1 becomes Reset signal through C7, and sent to CPU.
Whenever the battery is inserted, Reset signal is sent through Q5 to CPU.
*Refer to Charge Circuit (P.48).
52
KX-TC1488LBB
17.3. Battery Low / Power Down DetectorCircuit Operation:
“Battery Low” and “Power Down” are detected by RF IC which check the voltage from battery. Shortly, every detected blocksare inside of RF IC. The detected voltage is as follows;
· Battery Low
The CPU detects this level and IN USE “ ” starts flashing.
· Power Down
The output of RF IC (PD-OUT) becomes low level, then CPU detected this signal.
Next, CPU control Q10 by “PWR-DWN“ signal to cut the voltage supplied to most of Handset circuits.
<Fig. 202>
53
KX-TC1488LBB
18 SIGNAL ROUTEEach signal route is as follows.
54
KX-TC1488LBB
19 CPU DATA (BASE UNIT)
19.1. U1Pin No. Port Name Initial I/O Description Remark1 TXPWR H O TX Power control L: Tx power on2 CHG_OPT L O Charge mode control L: Trickle charge mode
H: Normal charge mode3 TX_DATA L O TX path data output4 INUSE_LED H O INUSE/CARGE LED control L: on5 MBR H O Make/Brake ratio select L:60/40 - (TC1485)
H:33/676 PAGE H I Locator botton status L: on7 CASMUTE/FLASHO L O CAS tone detect test point / Flash time option-0 (CASMUTE not used)8 RING_DET - I Ringer detect9 EIU - I 15/20 digit CID selection H: 15-digit CID
L: 20-digit CID - (TC1485)10 STD - I DTMF CID selection / DTMF Receiver Delayed Steering
outputH: DTMF Receiver present
11 ATE/FLASH1 - O CID IRQ Image signal / Flash time option-1 Flash Time Setting:[ pin 11, pin 7 ]0,0 : 100ms0,1 : 300ms1,0 : 600ms - (TC1485)1,1 : 730ms
12 DTMF - O DTMF Output Analog output13 LRIN - I Line Reversal input (Ring Input)14 VDDA - Analog Power supply15 VREF - I Referece voltage for Op-amp signals16 INS - I Op-amp single-ended signal input.17 INP - I Op-amp positive signal input for FSK18 INN - I Op-amp negative signal input for FSK19 OUT - O Op-amp output signal for FSK20 VSSA - Analog GND21 N.C no connection22 PLL_EN L O Serial data communication signal (Strobe)23 PLL_DATA L O Serial data communication signal (Data)24 PLL_CLK L O Serial data communication signal (CLOCK)25 CHG_DET - I Charge detect L: charge26 RX_DATA - I RX path data input27 SIG_OUT - I Carrier detect input (RF IC sigout) / Squelch input H: carrier present (RSSI)
L: out of range (squelchinput)
28 N.C reserved H29 LB_DET - I Not used H30 TADANS - Not used L31 VDD - Digital Power supply32 VSS - Digital GND33 XOUT - O 3.579MHz crystal oscillator34 XIN - I 3.579MHz crystal oscillator35 TEST - I Test signal input L36 RECRADLE L O Recradle control L: recradle37 HSREMT - reserved H38 RESET - I Reset L: Reset39 LNSEIZE L O Line seize control H: seize line40 Q1 - I DTMF decode signal input41 Q2 - I DTMF decode signal input42 Q3 - I DTMF decode signal input43 Q4 - I DTMF decode signal input44 CAS_ATT - O TXDATA attenuator during CAS. (CAS_ATT not used)
55
KX-TC1488LBB
19.2. U4 (DTMF CID IC)Pin No. Port Name I/O Description Remark1 IN+ I Non-Inverting input connection to the front-end differential amplifier2 IN- I Inverting Input connection to the front-end differential amplifier3 GS O Gain select. Gives access to output of front-end differential amplifier
for connection of feedback resister.4 VREF O Reference voltage output,nominally VDD/2.5 IC I Inhibit the detection of 1633Hz H: inhibit6 ICP I Power down H: Power down7 OSC1 I Clock input(3.579545MHz crystal connected)8 OSC2 O Output internal osciloator.(3.579545MHz crystal connected)9 VSS GND10 TOE I 3-state data output(Q1-Q4) enable H: enable11 Q1 O 3-state data output(provide the code corresponding to tone-pair
received)12 Q2 O 3-state data output Analog output13 Q3 O 3-state data output14 Q4 O 3-state data output15 STD O Delayed steering output H: registered and output latch
updated16 EST O Early steering output.17 ST/GT I/O Steering input/guard time output18 VDD Power supply
19.3. Digital Security Coding SystemEvery time the handset is put on the charging cradle of base unit, a 16-bit digital security code is generated and exchangedbetween base and handset. The security code is randomly selected amongst 65536 combinations. This is to comply with FCCPart 15.214(d) requirement.
56
KX-TC1488LBB
20 CPU DATA (HANDSET)
20.1. U1Pin No. Port Name Initial I/O Description Remark
1 VSS - Power Ground2 XIN - I 4MHz crystal oscillator input3 XOUT - O 4MHz crystal oscillator output4 TEST - I Test pin for out-going test. L5 VDD - Power supply6 LC_DET H I Battery Low detect signal input L: Battery Low7 RXPWR L O RX power control L: Power on8 RESET H I Reset L: Reset9 PD_OUT H I Power down detect signal input L: Power down10 CBOSTB L O Serial communication signal (Strobe)11 RX_DATA L I Rx path data input12 TX_DATA L O Tx path data input13 KEY_R4 L I Key scan signal row 414 KEY_R3 L I Key scan signal row 315 KEY_R2 L I Key scan signal row 216 KEY_R1 L I Key scan signal row 117 KEY_R0 L I Key scan signal row 018 VAREF - MCU reserve pin19 PWR_DWN - O Power Down control output L: Normal operation
H: Power Down20 BACKLIGHT H O Backlight Control L: Backlight on21 TXPWR L O TX power control L: Power on22 KEY_C4 L O Key scan signal column 423 KEY_C3 L O Key scan signal column 324 KEY_C2 L O Key scan signal column 225 KEY_C1/LB_DET L O Key scan signal column 126 KEY_C0/CHG_DET L O Key scan signal column 027 SIG_OUT L I Combo signal input28 CBOD/EEPD L I/O Combo Data / E2prom data29 CBOCLK L O Combo clock30 BUZZER - O Buzzer output L: on
H: off31 EEPCLK L O E2prom clock32 RINGER_SW L I Ringer On / Off H: on33 ATE - I Cradle Detect input L: Cradle detect34 SEG44 - O LCD segment interface35 SEG43 - O LCD segment interface36 SEG42 - O LCD segment interface37 SEG41 - O LCD segment interface38 SEG40 - O LCD segment interface39 SEG39 - O LCD segment interface40 SEG38 - O LCD segment interface41 SEG37 - O LCD segment interface42 SEG36 - O LCD segment interface43 SEG35 - O LCD segment interface44 SEG34 - O LCD segment interface45 SEG33 - O LCD segment interface46 SEG32 - O LCD segment interface47 SEG31 - O LCD segment interface48 SEG30 - O LCD segment interface49 SEG29 - O LCD segment interface50 SEG28 - O LCD segment interface51 SEG27 - O LCD segment interface52 SEG26 - O LCD segment interface53 SEG25 - O LCD segment interface54 SEG24 - O LCD segment interface55 SEG23 - O LCD segment interface56 SEG22 - O LCD segment interface57 SEG21 - O LCD segment interface58 SEG20 - O LCD segment interface59 SEG19 - O LCD segment interface60 SEG18 - O LCD segment interface
57
KX-TC1488LBB
Pin No. Port Name Initial I/O Description Remark61 SEG17 - O LCD segment interface62 SEG16 - O LCD segment interface63 SEG15 - O LCD segment interface64 SEG14 - O LCD segment interface65 SEG13 - O LCD segment interface66 SEG12 - O LCD segment interface67 SEG11 - O LCD segment interface68 SEG10 - O LCD segment interface69 SEG09 - O LCD segment interface70 SEG08 - O LCD segment interface71 SEG07 - O LCD segment interface72 SEG06 - O LCD segment interface73 SEG05 - O LCD segment interface74 SEG04 - O LCD segment interface75 SEG03 - O LCD segment interface76 SEG02 - O LCD segment interface77 SEG01 - O LCD segment interface78 SEG00 - O LCD segment interface79 COM00 - O LCD command interface80 COM01 - O LCD command interface81 COM02 - O LCD command interface82 COM03 - O LCD command interface83 COM04 - O LCD command interface84 COM05 - O LCD command interface85 COM06 - O LCD command interface86 COM07 - O LCD command interface87 COM08 - O LCD command interface88 COM09 - O LCD command interface89 COM10 - O LCD command interface90 COM11 - O LCD command interface91 COM12 - O LCD command interface92 COM13 - O LCD command interface93 COM14 - O LCD command interface94 COM15 - O LCD command interface95 V4 - I LCD bias96 V3 - I LCD bias97 V2 - I LCD bias98 V1 - I LCD bias99 C1 - I LCD power booster100 C0 - I LCD power booster
58
KX-TC1488LBB
21 EXPLANATION OF IC TERMINALS (RF UNIT)21.1. U1
Pin No. Pin Description Pin No. Pin Description1 EN Enable input 29 QUAD_IN FM detector input2 CDET COMP detection 30 QUAD_OUT IFamp2 output3 SF_OUT Splatter filter output 31 NDET Noise Detection4 SFC2 External splatter filter 32 RSSI_DET RSSI Detection5 SFC1 COMP output 33 2NDIF_IN IFamp2 input6 COMP_DC COMP output VREF 34 IFREF1 IFamp2 VREF7 POWERSAVE Power Save input 35 1STIF_OUT IFamp1 output8 MIC_OUT Microphone amp output 36 VCC1 VCC19 MIC_IN Microphone amp input 37 1STIF_IN IFamp1 input
10 BREF Audio system reference output 38 GND1 Ground 111 PD_OUT Power Down output 39 RXVCC RX-counter VCC12 VCC2 VCC2 40 PDL BL, PD threshold selection13 DOUT Data amp output 41 VSS RX-counter Gnd14 GND2 Ground 2 42 FIN_RX RX-counter input15 SPOUT2 SP amp output 1 43 SIGOUT LD, RSSI, ND output16 SPOUT1 SP amp output 2 44 BATTLOW BatteryLow output17 SPIN SP amp input 45 VSSS Logic Gnd18 PE Half-Mute detection 46 RXPD RX-phase comparator output19 ZAP ZAP write 47 PLLREG Logic Power Source Output20 GND3 Ground 3 48 TX_PD TX-phase comparator output21 EXPOUT EXP output 49 TXVCC3 TX-counter Vcc22 DIN Data amp input 50 FIN_TX TX-counter input23 EDET EXP detection 51 TXVSS TX-counter Gnd24 PRE_OUT Pre-amp output 52 OSCI Xtal oscillator input25 PRE_IN Pre-amp input 53 OSCO Xtal oscillator output126 DET_OUT FM Detector output 54 Xtal oscillator output227 NF_IN Noise filter input 55 DATA Serial data input28 NF_OUT Noise filter output 56 CLK Click input
59
KX-TC1488LBB
22 HOW TO REPLACE AFLAT PACKAGE IC
22.1. Preparation · PbF (: Pb free) Solder
· Soldering Iron
Tip Temperature of 700°F ± 20°F (370°C ± 10°C)
Note: We recommend a 30 to 40 Watt soldering iron. Anexpert may be able to use a 60 to 80 Watt iron wheresomeone with less experience could overheat and damagethe PCB foil.
· Flux
Recommended Flux: Specific Gravity → 0.82.
Type → RMA (lower residue, non-cleaning type)
Note: See ABOUT LEAD FREE SOLDER (PbF: Pb free)(P.4).
22.2. Procedure 1. Tack the flat pack IC to the PCB by temporarily soldering
two diagonally opposite pins in the correct positions on thePCB.
2. Apply flux to all of the pins on the IC.
3. Being careful to not unsolder the tack points, slide thesoldering iron along the tips of the pins while feedingenough solder to the tip so that it flows under the pins asthey are heated.
22.3. Removing Solder fromBetween Pins
1. Add a small amount of solder to the bridged pins.
2. With a hot iron, use a sweeping motion along the flat part ofthe pin to draw the solder from between the adjacent pads.
60
KX-TC1488LBB
23 CABINET AND ELECTRICAL PARTS LOCATION (BASEUNIT)
61
KX-TC1488LBB
24 CABINET AND ELECTRICAL PARTS LOCATION(HANDSET)
62
KX-TC1488LBB
25 ACCESSORIES AND PACKING MATERIALS
63
KX-TC1488LBB
26 TERMINAL GUIDE OF THE ICs TRANSISTORS ANDDIODES
26.1. Base Unit
26.2. Handset
64
KX-TC1488LBB
27 REPLACEMENT PARTSLIST
1. RTL (Retention Time Limited)
Note:
The marking (RTL) indicates that the Retention Time islimited for this item.
After the discontinuation of this assembly in production,the item will continue to be available for a specific periodof time. The retention period of availability depends onthe type of assembly and the laws governing parts andproduct retention. At the end of this period, theassembly will no longer be available.
2. Important safety notice
Components identified by the mark indicates specialcharacteristics important for safety. When replacing any ofthese components, only use specified manufacture’s parts.
3. The S mark means the part is one of some identical parts.For that reason, it may be different from the installed part.
4. RESISTORS & CAPACITORS
Unless otherwise specified;
All resistors are in ohms (Ω) K=1000Ω, M=1000kΩ
All capacitors are in MICRO FARADS (µF)P=µµF
*Type & Wattage of Resistor
27.1. Base Unit
27.1.1. Cabinet and Electrical PartsRef.No.
Part No. Part Name & Description Remarks
1 151023402301 TERMINAL, CHARGE
2 170023700010 ANTENNA
3 401390021780 CABINET BODY
4 402401220370 CABINET COVER
5 407400020376 PLATE, FIXING
6 408400020370 LEVER, HOOK
7 408401020376 BUTTON, HANDSET LOCATOR
8 410207100000 KEYBOARD SWITCH
9 432243511000 NAME PLATE
10 PQWCTC1461LA SHIELD, RF
11 407400020370 STAND, WALL MOUNT
Ref.No.
Part No. Part Name & Description Remarks
12 460100301010 RUBBER PARTS, FOOT
27.1.2. Main P.C.Board PartsRef.No.
Part No. Part Name & Description Remarks
PCB1 PQWP11488LBH MAIN P.C.BOARD ASS´Y (RTL)
(ICs)
U1 590225100000 IC (*1) S
U2 270074020012 IC S
U3 271002409030 IC S
U4 274097001007 IC S
(TRANSISTORS)
Q1 203904010000 TRANSISTOR(SI) S
Q2 203394090029 TRANSISTOR(SI) S
Q3 203394090029 TRANSISTOR(SI) S
Q4 203394090029 TRANSISTOR(SI) S
Q5 203394090029 TRANSISTOR(SI) S
Q6 203394090029 TRANSISTOR(SI) S
Q7 203394090029 TRANSISTOR(SI) S
Q8 203396090029 TRANSISTOR(SI) S
Q9 203396090029 TRANSISTOR(SI) S
Q10 203394090029 TRANSISTOR(SI) S
(DIODES)
D1 214418021000 DIODE(SI) S
D2 214418021000 DIODE(SI) S
D4 214004030007 DIODE(SI) S
D5 214418000000 DIODE(SI) S
D6 214418021000 DIODE(SI) S
D7 214418021000 DIODE(SI) S
D8 214418021000 DIODE(SI) S
D9 214418021000 DIODE(SI) S
D10 214418021000 DIODE(SI) S
D11 214418021000 DIODE(SI) S
D12 214418000000 DIODE(SI) S
D13 214404000000 DIODE(SI) S
ZD1 212560600000 DIODE(SI) S
ZD10 212750600000 DIODE(SI) S
(COILS)
L1 392000211000 COIL S
L2 252100200128 COIL S
L3 252680300000 COIL S
L6 252680300000 COIL S
L7 252680300000 COIL S
L9 252100300000 COIL S
L10 252100300000 COIL S
(CONNECTORS AND JACKS)
CON1 311049020000 CONNECTOR S
CON2 311153020600 CONNECTOR S
DC+- 301000700004 JACK S
JACK 300223407032 TEL JACK S
(CRYSTAL OSCILLATORS)
X1 260359500026 CRYSTAL OSCILLATOR S
X2 260000400126 CRYSTAL OSCILLATOR S
R1 ERDS2TJ220 22
R3 ERJ3GEYJ152 1.5K
R4 ERJ3GEYJ202 2K
R5 ERJ3GEYJ393 39K
R6 ERJ3GEYJ683 68K
R7 ERJ3GEY0R00 0
R8 ERJ3GEYJ275 2.7M
R9 ERJ3GEYJ102 1K
R11 ERJ3GEYJ304 300K
R12 ERJ3GEYJ363 36K
R15 ERJ3GEYJ103 10K
R16 ERJ3GEYJ302 3K
R17 ERJ3GEYJ104 100K
R18 ERJ3GEYJ163 16K
R19 ERJ3GEYJ473 47K
R21 ERJ3GEYJ153 15K
R22 ERJ3GEYJ683 68K
R23 ERJ3GEYJ224 220K
R24 ERJ3GEYJ561 560
65
KX-TC1488LBB
Ref.No.
Part No. Part Name & Description Remarks
R25 ERJ6GEYJ220 22
R27 ERJ3GEYJ473 47K
R28 ERJ3GEY0R00 0
R29 ERJ3GEYJ223 22K
R30 ERJ3GEYJ122 1.2K
R31 ERJ3GEYJ202 2K
R32 ERJ3GEYJ103 10K
R33 ERD25TJ510 51
R34 ERJ3GEYJ102 1.2K
R35 ERJ3GEYJ822 8.2K
R36 ERJ3GEYJ203 20K
R38 ERJ3GEYJ104 100K
R39 ERJ3GEYJ103 10K
R40 ERJ3GEYJ274 270K
R41 ERJ3GEYJ104 100K
R42 ERJ3GEYJ684 680K
R43 ERJ3GEYJ514 510K
R44 PQMGC25TJ206 20M
R45 PQMGC25TJ206 20M
R46 ERJ3GEYJ514 510K
R47 ERDS2TJ220 22
R48 ERJ3GEYJ103 10K
R49 ERD25TJ104 100K
R50 ERD25TJ104 100K
R51 PQMGC50TJ120 12
R52 ERJ3GEYJ104 100K
R53 ERJ3GEYJ243 24K
R54 ERJ3GEYJ103 10K
R55 ERJ3GEYJ103 10K
R56 ERDS2TJ103 10K
R57 ERJ3GEYJ103 10K
R58 ERJ3GEYJ103 10K
R59 ERJ3GEYJ471 470
R60 ERJ3GEYJ104 100K
R61 ERJ3GEYJ103 10K
R63 ERJ3GEYJ103 10K
R64 ERJ3GEYJ105 1M
R65 ERJ3GEYJ103 10K
R66 ERJ3GEYJ104 100K
R67 ERJ3GEYJ104 100K
R68 ERJ3GEYJ152 1.5K
R69 ERJ3GEYJ103 10K
R70 ERJ3GEYJ472 4.7K
R71 ERJ3GEYJ223 22K
R72 ERJ3GEYJ471 470
R73 ERJ3GEYJ473 47K
R74 ERD25TJ201 200
R75 ERJ3GEYJ103 10K
R77 ERJ3GEYJ473 47K
R78 ERJ3GEYJ104 100K
R79 ERD25TJ220 22
R81 ERJ3GEYJ473 47K
R82 ERJ3GEYJ153 15K
R83 ERJ3GEYJ104 100K
R84 ERJ3GEYJ103 10K
R85 ERJ3GEYJ104 100K
R86 ERJ3GEYJ104 100K
R87 ERJ3GEYJ105 1M
R89 ERD25TJ564 560K
R90 ERD25TJ564 560K
R91 ERJ6GEYJ470 47
R92 ERJ3GEYJ123 12K
R93 ERJ3GEYJ103 10K
R94 ERJ3GEYJ123 12K
R95 ERJ3GEYJ105 1M
R96 ERJ3GEYJ514 510K
R97 ERD25TJ154 150K
R98 ERJ3GEYJ473 47K
R99 ERJ3GEYJ473 47K
R100 ERJ3GEYJ184 180K
R101 ERJ3GEYJ683 68K
R102 ERJ3GEYJ362 3.6K
R103 ERJ3GEYJ203 20K
Ref.No.
Part No. Part Name & Description Remarks
R104 ERJ3GEYJ363 36K
R110 ERD25TJ390 39
R111 ERJ3GEYJ243 24K
R112 ERJ3GEYJ104 100K
R113 ERJ3GEYJ623 62K
R114 ERJ3GEYJ123 12K
R115 ERJ3GEYJ473 47K
R121 ERJ3GEYJ104 100K
R122 ERD25TJ563 56K
R125 ERJ3GEYJ104 100K
AR5 ERJ3GEYJ104 100K
AR5 ERJ3GEYJ154 150K
AR5 ERJ3GEYJ183 18K
AR5 ERJ3GEYJ273 27K
AR5 ERJ3GEYJ473 47K
AR5 ERJ3GEYJ563 56K
AR5 ERJ3GEYJ683 68K
AR5 ERJ3GEYJ823 82K
AR5 ERJ3GEYJ363 36K
AR5 ERJ3GEYJ513 51K
AR6 ERJ3GEYJ123 12K
AR6 ERJ3GEYJ473 47K
AR6 ERJ3GEYJ563 56K
AR6 ERJ3GEYJ683 68K
AR6 ERJ3GEYJ823 82K
AR6 ERJ3GEYJ303 30K
AR6 ERJ3GEYJ363 36K
AR6 ERJ3GEYJ913 91K
JR2 ERJ3GEY0R00 0
JR3 ERJ3GEY0R00 0
JR4 ERJ3GEY0R00 0
JR5 ERJ3GEY0R00 0
JR8 ERJ6GEY0R00 0
JR10 ERJ3GEY0R00 0
JR11 ERJ3GEY0R00 0
JR12 ERJ3GEY0R00 0
(CAPACITORS)
C1 ECUV1H221JCV 220P
C2 ECUV1C104JFV 0.1
C3 ECUV1C104ZFV 0.1
C4 ECUV1C104ZFV 0.1
C6 ECUV1C104ZFV 0.1
C7 ECUV1C104ZFV 0.1
C8 ECUV1H103KBV 0.01
C9 ECUV1C104ZFV 0.1
C10 220102350900 1000 S
C11 220102350900 1000 S
C13 PQCUV1C105JCV1
C14 PQCUV1C105ZF 1
C16 ECUV1C224KBV 0.22
C17 220101681300 2.2
C18 ECUV1H101JCV 100
C19 ECUV1H103KBV 0.01
C20 ECUV1C104ZFV 0.1
C22 ECUV1H150JCV 15
C24 ECUV1C104ZFV 0.1
C25 ECUV1H103KBV 0.1
C27 ECUV1C104ZFV 0.1
C28 ECUV1H471KBV 470p
C29 ECUV1H103KBV 0.01
C30 ECUV1C474KBV 0.47
C31 PQCUV1H224KB 0.22
C32 223561150000 5600 S
C33 ECUV1E273KBV 0.027
C35 ECUV1C104ZFV 0.1
C36 220101681309 0.01
C37 220101681309 0.01
C40 ECUV1H101JCV 100
C41 ECUV1H270JCV 27
C45 220102350900 1000 S
C47 ECUV1H103KBV 0.01
C48 ECUV1H560JCV 56
C49 ECUV1H101JCV 100
66
KX-TC1488LBB
Ref.No.
Part No. Part Name & Description Remarks
C50 ECUV1C104ZFV 0.1
C51 ECUV1C104ZFV 0.1
C52 ECUV1C104ZFV 0.1
C53 220102350900 1000 S
C54 ECUV1H331JCV 330
C55 PQCUV1C104ZFV0.1
C56 240100681700 0.1 S
C57 PQCUV1C105JCV1
C58 ECUV1H120JCV 12
C59 ECUV1H330JCV 330
C60 PQCUV1C105JCV1
C61 ECUV1C104ZFV 0.1
C62 ECUV1H331JCV 330
C63 ECUV1C104ZFV 0.1
C64 ECUV1C104ZFV 0.1
C65 ECUV1H102KBV 0.001
C66 ECUV1H330JCV 330
C67 ECUV1C104ZFV 0.1
C68 ECUV1H150JCV 15
C73 ECUV1H222KBV 0.0022
C74 ECUV1C104ZFV 0.1
C97 ECUV1C104JFV 0.1
AC3 ECUV1C224KBV 0.22
EC1 ECA1AM471B-J 470
EC2 ECA1CM101B 100
EC3 ECEA1AKA221 220
EC4 221470360100 470 S
EC5 ECA1CM101B 100
EC7 ECEA1CKA470B 47
EC8 ECEA1CKA102 1000
EC9 ECEA1HKA100B 10
EC10 ECEA1CKA470B 47
EC11 ECA1CM101B 100
EC12 ECA1CM101B 100
EC16 ECEA1HKA4R7B 4.7
EC18 ECEA1HKA4R7B 2.2
EC19 ECEA1HKA100B 10
(OTHERS)
F1 218250800111 THERMISTOR S
RLY1 254080000013 RELAY S
T4 258194190005 TRANSFORMER S
VC1 280300400000 TRIMMER CAPACITOR S
VDR1 218170900001 VARISTOR S
Note) *1: It is impossible to replace U1 by itself. To replaceU1, replace the PCB1 assembly.
27.1.3. Locator P.C.Board PartsRef.No.
Part No. Part Name & Description Remarks
PCB2 PQWP21485LAH LOCATOR P.C.BOARD ASS´Y (RTL)
(LED)
LED1 335181605805 LED S
27.1.4. RF P.C.Board PartsRef.No.
Part No. Part Name & Description Remarks
PCB3 PQWP31485LAH RF P.C.BOARD ASS´Y (RTL)
(IC)
U1 274085313220 IC S
(TRANSISTORS)
Q506 203403111419 TRANSISTOR(SI) S
Q509 203403111419 TRANSISTOR(SI) S
Q510 203403111419 TRANSISTOR(SI) S
Q512 203505180005 TRANSISTOR(SI) S
Q555 203505180005 TRANSISTOR(SI) S
Q556 203505180005 TRANSISTOR(SI) S
(DIODES)
D1 214418021000 DIODE(SI) S
D2 214418021000 DIODE(SI) S
Ref.No.
Part No. Part Name & Description Remarks
VD501 213024010006 DIODE(SI) S
VD502 213024010006 DIODE(SI) S
(CERAMIC FILTERS)
CF501 264100051046 CERAMIC FILTER S
F1 264100051046 CERAMIC FILTER S
(COILS)
L502 253200830200 COIL S
L503 253300830010 COIL S
L504 252330201801 COIL S
(RESISOTRS)
R1 ERJ3GEYJ153 15K
R2 ERJ3GEY0R00 0
R3 ERJ3GEYJ273 27K
R4 ERJ3GEYJ104 100K
R6 ERJ3GEYJ152 1.5K
R8 ERJ3GEYJ224 220K
R9 ERJ3GEYJ274 270K
R10 ERJ3GEYJ303 30K
R11 ERJ3GEYJ563 56K
R12 ERJ3GEYJ333 33K
R15 ERJ3GEYJ683 68K
R16 ERJ3GEYJ224 220K
R17 ERJ3GEYJ223 22K
R18 ERJ3GEYJ394 390K
R19 ERJ3GEYJ273 27K
R20 ERJ3GEYJ183 18K
R21 ERJ3GEYJ223 22K
R501 ERJ3GEYJ184 180K
R503 ERJ3GEYJ330 33
R504 ERJ3GEYJ102 1K
R509 ERJ3GEYJ102 1K
R510 ERJ3GEYJ390 39
R511 ERJ3GEYJ181 180
R512 ERJ3GEYJ221 220
R513 ERJ3GEYJ181 180
R514 ERJ3GEYJ471 470
R517 ERJ3GEYJ100 10
R518 ERJ3GEYJ153 15K
R520 ERJ3GEYJ103 10K
R522 ERJ3GEYJ103 10K
R524 ERJ3GEYJ221 220
R531 ERJ3GEYJ103 10K
R533 ERJ3GEYJ433 43K
R534 ERJ3GEYJ821 820
R536 ERJ3GEYJ153 15K
R537 ERJ3GEYJ221 220
R541 ERJ3GEYJ102 1K
R543 ERJ3GEYJ561 560
R544 ERJ3GEYJ821 820
R551 ERJ3GEYJ393 39K
R561 ERJ3GEYJ101 100
R562 ERJ3GEYJ124 120K
R569 ERJ3GEYJ103 10K
R571 ERJ3GEYJ102 1K
R577 ERJ3GEYJ101 100
R578 ERJ3GEYJ274 270K
R585 ERJ3GEY0R00 0
R593 ERJ3GEYJ102 1K
R604 ERJ3GEYJ471 470
R606 ERJ3GEYJ123 12K
R609 ERJ3GEYJ123 12K
R610 ERJ3GEYJ513 51K
R611 ERJ3GEYJ273 27K
R619 ERJ3GEY0R00 0
R621 ERJ3GEY0R00 0
R622 ERJ3GEY0R00 0
C564 ERJ3GEY0R00 0
C582 ERJ3GEY0R00 0
(CAPACITORS)
C1 ECUV1H470JCV 47P
C2 ECUV1C104JCV 0.1
C3 ECUV1C105ZFV 1
C4 ECUV1H040CCV 4P
67
KX-TC1488LBB
Ref.No.
Part No. Part Name & Description Remarks
C6 ECUV1C104JCV 0.1
C7 ECUV1H330JCV 33p
C8 ECUV1C104ZFV 0.1
C9 ECUV1C104ZFV 0.1
C10 PQCUV1C105ZF 1
C11 PQCUV1C225ZF 2
C12 ECUV1H680JCV 68P
C13 ECUV1H473KB 0.047
C14 ECUV1H102KBV 0.001
C15 ECUV1H473KB 0.047
C17 ECUV1H103KBV 0.01
C19 ECUV1C104JCV 0.1
C20 ECUV1H101JCV 100P
C21 ECUV1C104ZFV 0.1
C22 ECUV1C104JCV 0.1
C23 ECUV1C104ZFV 0.1
C24 ECUV1H151JCV 150P
C25 ECUV1C104JCV 0.1
C28 ECUV1C104ZFV 0.1
C29 ECUV1C104ZFV 0.1
C30 PQCUV1C105ZF 1
C31 ECUV1C104ZFV 0.1
C32 ECUV1C104ZFV 0.1
C33 ECUV1C105ZFV 1
C34 ECUV1H222KBV 0.0022
C35 ECUV1H682KBV 0.0068
C36 ECUV1H102KBV 0.001
C37 ECUV1H010CCV 1P
C38 ECUV1C104ZFV 0.1
C39 ECUV1H121JCV 120p
C40 ECUV1H121JCV 120P
C41 ECUV1H121JCV 120P
C500 ECUV1H330JCV 33P
C502 ECUV1H102KBV 0.001
C503 ECUV1H680JCV 68P
C504 ECUV1H103KBV 0.01
C505 ECUV1H680JCV 68P
C519 ECUV1H070CCV 7P
C521 ECUV1H103KBV 0.01
C526 ECUV1H103KBV 0.01
C527 ECUV1H030CCV 3P
C530 ECUV1H680JCV 68P
C533 ECUV1H100DCV 10P
C534 PQCUV1C105ZF 1
C535 ECUV1C104ZFV 0.1
C536 ECUV1H123KBV 0.012
C537 PQCUV1H104KB 0.1
C538 PQCUV1C105ZF 1
C539 ECUV1H040CCV 4P
C541 ECUV1H102KBV 0.001
C542 ECUV1H100DCV 10P
C543 ECUV1H330JCV 33P
C545 ECUV1H040CCV 4P
C546 ECUV1H060CCV 6P
C549 ECUV1H020CCV 2P
C554 ECUV1H040CCV 4P
C556 ECUV1H102KBV 0.001
C559 PQCUV1C224KB 0.22
C560 ECUV1H102KBV 0.001
C561 ECUV1H470JCV 47P
C562 ECUV1H270JCV 27P
C563 ECUV1H222KBV 0.0022
C565 ECUV1H020CCV 2P
C566 ECUV1H050CCV 5P
C567 ECUV1H050CCV 5P
C568 ECUV1H102KBV 0.001
C569 ECUV1H100DCV 10P
C570 ECUV1H102KBV 0.001
C571 ECUV1H680JCV 68p
C572 ECUV1H470JCV 47P
C573 ECUV1H010CCV 1P
C574 ECUV1H060CCV 6P
C575 ECUV1H060CCV 6P
Ref.No.
Part No. Part Name & Description Remarks
C578 ECUV1H060CCV 6P
C583 ECUV1H330JCV 33P
C586 ECUV1H070CCV 7P
C590 ECUV1H010CCV 1P
C591 ECUV1H123KBV 0.012
C592 PQCUV1H104KB 0.1
C593 ECUV1H680JCV 68P
C595 ECUV1H100DCV 10P
C597 ECUV1H010CCV 1P
C598 ECUV1H020CCV 2P
C599 ECUV1H120JCV 12P
C602 ECUV1H020CCV 2P
C604 ECUV1H222KBV 0.0022
C605 ECUV1H221JCV 220P
ESC10 ECUV1C104ZFV 0.1
R13 ECUV1H102KBV 0.001
(OTHERS)
FL501 251902140418 DUPLEX S
T1 250076000014 TRANS S
27.2. Handset
27.2.1. Cabinet and Electrical PartsRef.No.
Part No. Part Name & Description Remarks
101 407390022255 PANEL, LCD
102 472042052010 ADHESIVE TAPE
103 407391020370 ANTENNA
104 461001000000 COVER, SPEAKER
105 332285301014 SPEAKER
106 403390321780 CABINET BODY
107 432243500000 NAME PLATE
108 470312501000 SPACER
109 420197100000 SHEET, PVC COVER
110 463102300000 COVER, HEADSET
111 408400020446 BUTTON, KEY
112 410205008100 KEYBOARD SWITCH
113 408392020370 LEVER, RINGER
114 464100000010 RUBBER
115 PQWCTC1461LA SHIELD, RF
116 337224314010 LCD BACK LIGHT
117 151021208301 TERMINAL, CHARGE
118 151022208301 TERMINAL, CHARGE
119 404390420440 CABINET COVER
120 PQWBTC1461 BATTERY, NI-CD
121 470216031000 CUSHION
122 406390020370 RID, BATTERY
123 470011001180 SPACER, CUSHION LCD
124 154013605011 GUIDE, LCD
125 470025001020 SPACER, CUSHION LCD
126 334218000000 LIQUID CRYSTAL DISPLAY
127 463001960010 CONNECTOR
128 420204005000 SHEET, PET
27.2.2. Main P.C.Board PartsRef.No.
Part No. Part Name & Description Remarks
PCB100 PQWP11485LAR MAIN P.C.BOARD ASS´Y (RTL)
(ICs)
U1 273022514012 IC S
U2 272021627070 IC S
U3 271713328032 IC S
(TRANSISTORS)
Q1 203396090029 TRANSISTOR(SI) S
Q2 203396090029 TRANSISTOR(SI) S
Q4 203396090029 TRANSISTOR(SI) S
Q5 203394090029 TRANSISTOR(SI) S
Q8 203396090029 TRANSISTOR(SI) S
Q9 203800010300 TRANSISTOR(SI) S
Q10 203112090005 TRANSISTOR(SI) S
(DIODES)
68
KX-TC1488LBB
Ref.No.
Part No. Part Name & Description Remarks
D1 214418021000 DIODE(SI) S
D2 214004030007 DIODE(SI) S
D3 214418021000 DIODE(SI) S
D4 214418021000 DIODE(SI) S
D8 214418021000 DIODE(SI) S
D9 214418021000 DIODE(SI) S
D10 214418021000 DIODE(SI) S
D11 214418021000 DIODE(SI) S
D15 214418021000 DIODE(SI) S
ZD2 212560670000 DIODE(SI) S
LED1 335181605805 LED S
LED7 335151600016 LED S
LED8 335151600016 LED S
LED9 335151600016 LED S
LED10 335151600016 LED S
(COILS)
L1 252680300000 COIL S
L2 252680300000 COIL S
(RESISTORS)
R1 ERJ3GEYJ222 2.2K
R2 ERJ3GEYJ104 100K
R3 ERJ3GEYJ104 100K
R4 ERJ3GEYJ475 4.7M
R5 ERJ3GEYJ104 100K
R6 ERJ3GEYJ472 4.7K
R11 ERJ3GEYJ104 100K
R12 ERJ3GEYJ104 100K
R13 ERJ6GEYJ470 47
R14 ERJ3GEYJ472 4.7K
R15 ERJ3GEYJ104 100K
R16 ERJ3GEYJ104 100K
R18 ERJ3GEYJ152 1.5K
R19 ERJ3GEYJ103 10K
R20 ERJ3GEYJ152 1.5K
R21 ERJ3GEYJ103 10K
R23 ERJ3GEYJ473 47K
R25 ERJ3GEY0R00 0
R28 ERJ3GEYJ473 47K
R29 ERJ3GEYJ473 47K
R30 ERJ3GEYJ473 47K
R31 ERJ3GEY0R00 0
R32 ERJ3GEYJ103 10K
R33 ERJ3GEYJ204 200K
R35 ERJ3GEYJ103 10K
R37 ERJ3GEYJ330 33
R38 ERJ3GEYJ470 47
R40 ERJ3GEYJ104 100K
R41 ERJ3GEYJ104 100K
R45 ERJ3GEYJ472 4.7K
R46 ERJ3GEYJ473 47K
R47 ERJ3GEYJ473 47K
R48 ERJ3GEYJ103 10K
R49 ERJ3GEYJ222 2.2K
R53 ERJ3GEYJ473 47K
R55 ERJ3GEYJ223 22K
R57 ERJ3GEYJ103 10K
R58 ERJ3GEY0R00 0
R61 ERJ6GEYJ220 22
R64 ERJ3GEY0R00 0
R65 ERJ3GEYJ473 47K
R67 ERJ3GEYJ103 10K
R68 ERJ3GEY0R00 0
R75 ERJ3GEYJ104 100K
R76 ERJ3GEYJ104 100K
R78 ERJ3GEYJ104 100K
R88 ERJ3GEYJ104 100K
R89 ERJ3GEYJ203 20K
R9 ERJ3GEYJ473 47K
R90 ERJ3GEY0R00 0
R91 ERJ3GEY0R00 0
(CAPACITORS)
C1 PQCUV1C225ZF 2.2
C2 PQCUV1C104ZF 0.1
Ref.No.
Part No. Part Name & Description Remarks
C3 PQCUV1C225ZF 2.2
C4 PQCUV1C225ZF 2.2
C6 ECUV1C104ZFV 0.1
C7 PQCUV1C105ZF 1
C8 ECUV1H103KBV 0.01
C9 ECUV1C104ZFV 0.1
C10 ECUV1H103KBV 0.01
C11 PQCUV1C104ZF 0.1
C12 ECUV1H103KBV 0.01
C14 ECUV1C104ZFV 0.1
C16 PQCUV1C104ZF 0.1
C17 ECUV1C104ZFV 0.1
C18 ECUV1H100JBV 10P
C19 PQCUV1C225ZF 2.2
C20 ECUV1C104ZFV 0.1
C22 ECUV1C104ZFV 0.1
C23 PQCUV1C225ZF 2.2
C31 PQCUV1C105ZF 1
C32 ECUV1C104ZFV 0.1
C33 ECUV1C104ZFV 0.1
C34 ECUV1C104ZFV 0.1
C35 ECUV1C104ZFV 0.1
C36 ECUV1C104ZFV 0.1
C60 ECUV1H270JBV 27
C64 PQCUV1C105ZF 1
C100 ECUV1C104ZFV 0.1
C102 ECUV1H102KBV 1000P
C103 ECUV1H102KBV 1000P
C110 ECUV1C224KBV 0.22
EC1 ECEA1CKA101B 100
(OTHERS)
BATT 310020040018 BATTERY JACK S
CN2 311153520500 FLAT CABLE S
E101 330128051107 RINGER S
E102 333609700103 MICROPHONE S
E103 324124008040 SLIDE SWITCH S
VC1 280300510007 VARIABLE CAPACITOR S
X2 260000400126 CRYSTAL OSCILLATOR S
27.2.3. RF P.C.Board PartsRef.No.
Part No. Part Name & Description Remarks
PCB200 PQWP21485LAR RF P.C.BOARD ASS´Y (RTL)
(IC)
U1 274085313220 IC S
(TRANSISTORS)
Q506 203403111419 TRANSISTOR(SI) S
Q509 203403111419 TRANSISTOR(SI) S
Q510 203403111419 TRANSISTOR(SI) S
Q512 203505180005 TRANSISTOR(SI) S
Q555 203505180005 TRANSISTOR(SI) S
Q556 203505180005 TRANSISTOR(SI) S
(DIODES)
VD501 213024010006 DIODE(SI) S
VD502 213024010006 DIODE(SI) S
(CERAMIC FILTERS)
CF501 264100051046 CERAMIC FILTER S
F1 264100051046 CERAMIC FILTER S
(COILS)
L502 253200830200 COIL S
L503 253300830010 COIL S
L504 252330201801 COIL S
FL501 251902040518 CERAMIC FILTER S
(RESISTORS)
R1 ERJ3GEYJ153 15K
R2 ERJ3GEY0R00 0
R3 ERJ3GEYJ273 27K
R4 ERJ3GEYJ104 100K
R6 ERJ3GEYJ152 1.5K
R8 ERJ3GEYJ393 390K
R9 ERJ3GEYJ274 270K
R10 ERJ3GEYJ153 15K
69
KX-TC1488LBB
Ref.No.
Part No. Part Name & Description Remarks
R11 ERJ3GEYJ513 51K
R12 ERJ3GEYJ273 27K
R15 ERJ3GEYJ154 150K
R16 ERJ3GEYJ204 200K
R17 ERJ3GEYJ223 22K
R30 ERJ3GEYJ272 2.7K
R31 ERJ3GEYJ562 5.6K
R501 ERJ3GEYJ184 180K
R503 ERJ3GEYJ330 33
R504 ERJ3GEYJ102 1K
R509 ERJ3GEYJ102 1K
R510 ERJ3GEYJ5R1 5.1
R511 ERJ3GEYJ361 360
R512 ERJ3GEYJ221 220
R513 ERJ3GEYJ361 360
R514 ERJ3GEYJ101 100
R517 ERJ3GEYJ100 10
R518 ERJ3GEYJ153 15K
R520 ERJ3GEYJ103 10K
R522 ERJ3GEYJ103 10K
R524 ERJ3GEYJ221 220
R531 ERJ3GEYJ103 10K
R533 ERJ3GEYJ183 18K
R534 ERJ3GEYJ821 820
R536 ERJ3GEYJ153 15K
R537 ERJ3GEYJ221 220
R541 ERJ3GEYJ102 1K
R543 ERJ3GEYJ331 330
R544 ERJ3GEYJ561 560
R551 ERJ3GEYJ203 20K
R561 ERJ3GEYJ101 100
R562 ERJ3GEYJ124 120K
R569 ERJ3GEYJ103 10K
R571 ERJ3GEYJ102 1K
R577 ERJ3GEYJ101 100
R578 ERJ3GEYJ274 270K
R585 ERJ3GEY0R00 0
R593 ERJ3GEYJ102 1K
R604 ERJ3GEYJ471 470
R606 ERJ3GEYJ123 12K
R609 ERJ3GEYJ123 12K
R610 ERJ3GEYJ513 51K
R611 ERJ3GEYJ273 27K
R619 ERJ3GEY0R00 0
R16A ERJ3GEYJ104 100K
R16A ERJ3GEYJ124 120K
R16A ERJ3GEYJ154 150K
R16A ERJ3GEYJ184 180K
R16A ERJ3GEYJ683 68K
R16A ERJ3GEYJ823 82K
R16A ERJ3GEYJ204 200K
R16A ERJ3GEYJ753 75K
R16A ERJ3GEYJ913 91K
(CAPACITORS)
C1 ECUV1H470JCV 47P
C2 ECUV1C104JCV 0.1
C3 ECUV1H473ZFV 0.047
C4 ECUV1H040CCV 4P
C5 ECUV1H221JCV 220P
C6 ECUV1C104JCV 0.1
C7 ECUV1H331JCV 330P
C8 ECUV1C104ZFV 0.1
C10 PQCUV1C224KB 0.22
C11 PQCUV1C225ZF 2.2
C12 ECUV1H680JCV 68P
C13 ECUV1H473KB 0.047
C15 ECUV1H473KB 0.047
C17 ECUV1H103KBV 0.01
C19 ECUV1C104JCV 0.1
C20 ECUV1H101JCV 100P
C21 ECUV1C104ZFV 0.1
C22 ECUV1C104JCV 0.1
C23 ECUV1C104ZFV 0.1
Ref.No.
Part No. Part Name & Description Remarks
C24 ECUV1H151JCV 150P
C25 ECUV1H153KBV 0.015
C29 ECUV1C104ZFV 0.1
C30 PQCUV1C105ZF 1
C31 ECUV1C104ZFV 0.1
C32 ECUV1C104ZFV 0.1
C33 ECUV1C104ZFV 0.1
C34 ECUV1H681KB 680P
C35 ECUV1H223KBV 0.022
C36 ECUV1H122KBV 0.0012
C37 ECUV1H010CCV 1P
C39 ECUV1H121JCV 120P
C500 ECUV1H330JCV 33P
C502 ECUV1H102KBV 0.001
C503 ECUV1H680JCV 68P
C504 ECUV1H103KBV 0.01
C519 ECUV1H040CCV 4P
C521 ECUV1H103KBV 0.01
C526 ECUV1H103KBV 0.01
C527 ECUV1H030CCV 3P
C530 ECUV1H680JCV 68P
C533 ECUV1H100CCV 10P
C534 PQCUV1C105ZF 1
C535 ECUV1C104ZFV 0.1
C536 ECUV1H123KBV 0.012
C537 PQCUV1H104KB 0.1
C538 PQCUV1C105ZF 1
C539 ECUV1H040CCV 4P
C541 ECUV1H102KBV 0.001
C542 ECUV1H100CCV 10P
C543 ECUV1H330JCV 33P
C545 ECUV1H030CCV 3P
C546 ECUV1H060CCV 6P
C549 ECUV1H020CCV 2P
C554 ECUV1H040CCV 4P
C556 ECUV1H102KBV 0.001
C559 PQCUV1C224KB 0.22
C560 ECUV1H102KBV 0.001
C561 ECUV1H470JCV 47P
C562 ECUV1H270JCV 27P
C563 ECUV1H222KBV 0.0022
C564 ECUV1H470JCV 47P
C565 ECUV1H020CCV 2P
C566 ECUV1H050CCV 5P
C567 ECUV1H040CCV 4P
C568 ECUV1H102KBV 0.001
C569 ECUV1H100CCV 10P
C570 ECUV1H103KBV 0.01
C571 ECUV1H680JCV 68P
C572 ECUV1H470JCV 47P
C573 ECUV1H010CCV 1P
C574 ECUV1H060CCV 6P
C575 ECUV1H060CCV 6P
C578 ECUV1H060CCV 6P
C582 ECUV1H040CCV 4P
C583 ECUV1H330JCV 33P
C586 ECUV1H150JCV 15P
C590 ECUV1H030CCV 3P
C591 ECUV1H123KBV 0.012
C592 PQCUV1H104KB 0.1
C593 ECUV1H680JCV 68P
C595 ECUV1H100CCV 10P
C597 ECUV1H010CCV 1P
C598 ECUV1H020CCV 2P
C599 ECUV1H150JCV 15P
C600 ECUV1H010CCV 1P
C602 ECUV1H010CCV 1P
C604 ECUV1H222KBV 0.0022
C605 ECUV1H270JCV 27P
EC1 PQCUV1C225ZF 2.2
EC2 ECEA1HKA3R3 3.3
ESC10 ECUV1C104ZFV 0.1
R13 ECUV1H102KBV 0.001
70
KX-TC1488LBB
Ref.No.
Part No. Part Name & Description Remarks
(OTHERS)
T1 250076000014 TRANS S
VR1 237103054905 VARISTOR S
27.3. Accessories and PackingMaterials
Ref.No.
Part No. Part Name & Description Remarks
A1 141500720600 CORD, TELEPHONE
A2 PQWATC1468LB AC ADAPTOR
A3 435243101000 CARD, CHARGE
A4 407400020440 HANGER, BELT CLIP
A5 PQQX13621Z INSTRUCTION BOOK
P1 444208319210 ACCESSORY BOX
P2 444203317110 CUSHION
P3 444203317210 CUSHION, ANTENNA
P4 491320121010 PROTECTION COVER (for BaseUnit)
P5 491300010210 PROTECTION COVER (forHandset)
P6 PQPK13999Z CARTON BOX
71
KX-TC1488LBB
28 FOR SCHEMATIC DIAGRAM
28.1. Base Unit (SCHEMATIC DIAGRAM (BASE UNIT)) 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground.
2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.
Important Safety Notice:Components identified by mark have special characteristics important for safety. When replacingany of these components, use only the manufacturer´s specified parts.
28.2. Handset (SCHEMATIC DIAGRAM (HANDSET)) 1. DC voltage measurements are taken with an oscilloscope or a tester with a ground.
2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.
72
KX-TC1488LBB
28.3. Memo
73
KX-TC1488LBB
29 S
CH
EM
AT
ICD
IAG
RA
M(B
AS
EU
NIT
)29
.1.
Mai
n
KX
-TC
1488
LBB
SC
HE
MAT
IC D
IAG
RA
M (
BA
SE
UN
IT)
Mai
n
U1
U4
TX DT
MF
CID
FS
K C
ID
RX
inpu
t34
7mV
p-p
(-16
dBm
/60
0 )
outp
ut-2
3dB
m
5V
19m
Vp-
p
DT
MF
CID
FS
K C
ID
KX-TC1488LBB
74
29.2
. R
FM
odul
e
1mV
p-p
245m
Vp-
p
109m
Vp-
p
174m
Vp-
p
U1
TX
RX
KX
-TC
1488
LBB
SC
HE
MAT
IC D
IAG
RA
M (
BA
SE
UN
IT)
RF
Mod
ule
1KH
z to
ne25
kHz
Dev
.in
put
1KH
z to
ne25
kHz
Dev
.ou
tput
1.75
±0.
2V 1.8±
0.15
V30
8mV
p-p
2.5m
Vp-
p
KX-TC1488LBB
75
30 S
CH
EM
AT
ICD
IAG
RA
M(H
AN
DS
ET
)30
.1.
Mai
n
212m
Vp-
p(-
20.5
dBm
)
10.7
mV
p-p
INP
UT
1kH
zR
X
TX
KX
-TC
1488
LBB
SC
HE
MAT
IC D
IAG
RA
M (
HA
ND
SE
T)
Mai
n
KX-TC1488LBB
76
30.2
. R
FM
odul
e
RX
TX
U1
8.7m
Vp-
p
1KH
z to
ne25
kHz
Dev
.in
put
1KH
z to
ne25
kHz
Dev
.ou
tput
1.75
±0.
2V
1.8±
0.15
V15
5mV
p-p
55m
Vp-
p0.
9mV
p-p
2.7m
Vp-
p
KX
-TC
1488
LBB
SC
HE
MAT
IC D
IAG
RA
M (
HA
ND
SE
T)
RF
Mod
ule
KX-TC1488LBB
77
30.3
. M
emo
KX-TC1488LBB
78
31 CIRCUIT BOARD (BASE UNIT)
31.1. Main (Component View)
KX-TC1488LBB: BASE UNIT Main (Component View)
PbFU
4
CH-
CH+
L6
L7
J28R
33
R44
R45
C36
C37
J27
J25
J21
J19
J20 J3
6
J33
J1
L2
J3 J39J2
R11
9C
17
R97
TIP
RIN
GVD
R1
J30
J34
J35
J24
J23
R79
J5
J7
J18
R12
2
X2
R50
R49
R89
R90
EC
10
EC
19
R11
0
EC
16
D5
EC6
EC2
EC9
Q1
Q9
J31
R74
EC18
EC11
J12R1
J13
J15J16
J11
J17
W1
EC5
EC12
CON2
CO
N1
EC1
J37
J8
J9
EC7
X1
15 10 5 1
14
J26
J32
EC8
EC4
R47
C53
C45
C11
W1
L1
C10
ZD1
D13
D12
L3
ZD11
DC+
DC-
T4
RL1
L10
F1
F1 300mA250V
L9
R56
C32
VC1
ZD
10
ZD
2
SIG_OUT
PbF
79
KX-TC1488LBB
31.2. Main (Flow Solder Side View)
KX-TC1488LBB: BASE UNIT Main (Flow Solder Side View)
U1
U3
D1Q3
C7C20
C63
R28
R59C16C34C99C65
R55
R7
JR4
R15JR5
JR12
R68R109
R111C52
CAS
ATE
CAS_ATT
EC3
R18
R11
C3
R11
4R12
R65
R66R67
R60TP4
TP1
TP3
JR3R77
D4
R64
C46
C68
D4
2322
11
C22
C8C6
R27
Q5
R73
Q2
Q6
Q7
Q4
Q10
Q8
C2
R26
R108
R17D11
C42R76
C12
U2
R9
R30
+5V AC3C60
TP2
R107
R24
C14
C28R22
R41 R40
C35
C1
R43
AC4
AC2
R42 R8
C19
C74
C55
C64
C56
R51
R72
R48C67
C30
R95
C97
R96
JR11
R94
JR8
R2
R78
R92
C62C
54
R34
R21
R23
R46
R10
4 R10
3R
105
C49
C23
C24
C15
C25
C57
C4R63
R10
0
R98
41
R58
R61
R86
R57
R54
R70
C66
C41
R85
R117
R11
0
R116
R12
5
R12
3R
52
R12
1
JR2
R12
4R
19
R13 D
3R
102
R71
R38
R10
1C
48
C40 R
99
C51
C5
C43C
44C
50
R80
R37
R83R93
R35
R36
R39
R4
R11
5
R69
R91
R53
R82R
6 AR
6
R3R
113
C73
C47
C27 C
13
C58
R87
C18
R81
R88
R14
7
R15
0 R12
0
R11
8
R11
2
R14
C59
R16
R20
C39
C33
C38
R75
D2
C29
D6
R5
AR
5R
106
C26
R32 R
31
R25
C31
R84
R29
R62
C61
D7 D8
D9
D10
C21C9
PbF
80
KX-TC1488LBB
31.3. Locator (Component View)
KX-TC1488LBB: BASE UNIT Locator (Component View)
PbF
31.4. Locator (Flow Solder Side View)
KX-TC1488LBB: BASE UNIT Locator (Flow Solder Side View)
PbF
81
KX-TC1488LBB
31.5. Memo
82
KX-TC1488LBB
31.6. RF Module (Component View)
KX-TC1488LBB: BASE UNIT RF Module (Component View)
R517
R551
R514
R511
R513
R536
C574 C575
C595
C555
R585
C583
C538
C57
0
C50
0
R51
0
R52
4R
522
R54
3
R51
8
R54
4
R59
3
R50
9
R60
4
R4
R13
R10
R8 R61
1R
606
R512
R7
R609
R531
R504
R520
R534
R533
R537
R9
R610
R578
R62
1
R619
C530
C20
C593
C592
C545
C598
C591
L503
L506C4
R571
C559
C556
C560
C562
C586
C567
C557
C12C535
C533
C22C25 C605
CF501
C563
C23
U1
C502
C8
C31
C37
C32
R5
R3
C39
T1
C28
P3
C38
C6
R12
R11R18
R1
R21
C21C16
D1
R30R31 15 10 5 1
ESC8 ESC7
R19
C7
C33
R17
R20
C34
C13
C3
C35C36
R15
C30
C29 C24
C604
L504
R503 R6
R521
R562
R561
R577
C568
Q555
Q556
Q506
Q512
R56
9
R50
1
C57
8
C54
6
C50
3C
582
FL5
01
C59
7
C54
2
C60
0
C56
5
C51
9
C56
4
C56
6
C60
2
Q50
9
L502
L505
VD
501
VD
502
C59
0
C59
9
C54
9C
534
C57
3
C56
9
C52
6
C56
1
C50
4
C54
3
C54
1
C53
7
C55
4
C53
9
C53
6
C15
R622
R11
1
EC
2
D2
C14
C19
C11
C2
R16
EC
1
C17
C18
F1
C9 C10
C5
C40
C55
8
R2
C50
5
ES
C10
C41
C57
2C
527
Q510
C521
C571C1 R541 P
bF
TP510
TP809(TXVCO)
D_OUT
D_IN
Tx Data REC_O/P_A
TP808 (RXVCO)
83
KX-TC1488LBB
31.7. RF Module (Flow Solder Side View)
KX-TC1488LBB: BASE UNIT RF Module (Flow Solder Side View)
PbF
84
KX-TC1488LBB
32 CIRCUIT BOARD (HANDSET)
32.1. Main (Component View)
C2
4
C2
L2
ZD2
R58
GND
MIC_I/P
BATT
C13
R55
L1
Q5
U3AAQ9
U2
U3
U3A
C17
C30VCC
R37
C34
C110
C1
D2
81 50
31
30
80
C4
WJ1
51
U1
1001
C9
R45R66
R38
R21
D4
C28
C27
Q10
R41R75
R30R60
R44R46R28
R62R51
R29R61
R40Q2
7 1
Q6Q1
SPK
R79D1
R19 R18
R78
R4
R49R26
C60
R42
R67
R54
R24
C15
R11R88
C14
Q3 R65
R7
X2
R2
Q7
ATE
Q8
Q4 SW1
R8
R1
CON215
C31
BATT+
C1
02
C1
0R
5R
6C
7
C5
R9
2C
26
EC
3
EC
5E
C2
EC
5A
EC
2A
EC
3A
C2
9
C3
C2
2R
25
C3
3C
18
C3
2C
36 C3
5V
C1
C8
C3
8
C2
0
C2
3
C3
7C
21
R3
3 C1
6
ZD
3
C6
4
D1
0D
8
D1
1D
9
D3
C1
1
C1
03
R5
9
C2
5R3
C1
2
C1
9
R5
7R
47
C3
9 Q1
2
OF
FO
N
BU
ZZ
LE
D (
+)
LE
D (
-)
R8
0
R8
1 R6
4
R1
4
R1
3
R9
1R9
0
C6
D1
5
R3
5R
32
R4
8R
53R
31
R1
6R
12
R1
5
R5
2
R6
8
R8
9R
23
R2
0R
76
R9
C1
00
PbF
KX-TC1488LBB: HANDSET Main (Component View)
85
KX-TC1488LBB
32.2. Main (Flow Solder Side View)
KX-TC1488LBB: HANDSET Main (Flow Solder Side View)
EC1 EC4
LCD1
REDIAL
TALK
LED
7
LED
9
LED
10
LED
8
1 2 3
4 5 6
7 8 9
MUTE CH
MIC
AUTO
0 #
OFF
UP
DOWN
EDIT
PbF
86
KX-TC1488LBB
32.3. RF Module (Component View)
R517
R551
R514
R511
R513
R536
C574 C575
C595
C555
R585
C583
C538
C57
0
C50
0
R51
0
R52
4R
522
R54
3
R51
8
R54
4
R59
3
R50
9
R60
4
R14
R4
R13
R10
R8
R61
1R
606
R512
R7
R609
R531
R504
R520
R534
R533
R537
R9
R610
R578
R621R5VR1
R31
R619
R30
C530
C20
C593
C592
C545
C598
C591
L503
L506
C4
R571
C559
C556
C560
C562
C586
C567
C557C12
EC1
C535
C533
C16
C22C25 C605
CF501
C563
C23
U1
C502
C8
C31
C37
C32
R5A
R3
C39
T1
C28
P3
C38
C6
R12
R11R18
R1
R21
C21
16 10 5 1
ESC8 ESC7
R19
C7
C33
R17
C34
C13
C3
C35C36
R15
C30
C29C24
C604
L504
R503 R6
R521
R562
R561
R577
C568
Q555
Q556
Q506
Q512
R56
9
R50
1
C57
8 FL5
01
C54
6
C50
3C
582
C59
7
C54
2
C60
0
C56
5
C51
9
C56
4
C56
6
C60
2
Q50
9
L502
L505
VD
501
VD
502
C59
0
C59
9
C54
9C
534
C57
3
C56
9
C52
6
C56
1
C50
4
C54
3
C54
1
C53
7
C55
4
C53
9
C53
6
C15
R62
2
R11
1
EC
2C
14
C19
C11
C2
R16
C17
C18
F1
C9 C10
C5
C40
C55
8
R2
C50
5
ES
C10
C41
C57
2
C52
7 Q51
0
C521
C571C1 R541
VR1
Ext_outPre_out
KX-TC1488LBB: HANDSET RF Module (Component View)
Tx data DET_out SIG_out
TP808 (RXVCO)
PbF
TP510
TP809(TXVCO)
87
KX-TC1488LBB
32.4. RF Module (Flow Solder Side View)
KX-TC1488LBB: HANDSET RF Module (Flow Solder Side View)
PbF
RA16A
88
KX-TC1488LBB
MKXTC1488LBB-AK