1
Service Manual – PB Series REV NO : 3
PB Series
Service Manual
LAST Rev. NO : 3 LAST Rev. Date : 2010. 01. 28
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Service Manual – PB Series REV NO : 3
Table of Contents 1. Proper Operation / Introduction...................................................................................................................... 3
1.1. Preface .................................................................................................................................................. 3
1.2. Precaution.............................................................................................................................................. 3
2. Classification ................................................................................................................................................... 4
2.1. Overall View.......................................................................................................................................... 4
2.2. Display Pad (Key Pad) .......................................................................................................................... 4
2.2.1. PB ................................................................................................................................................ 4
3. Getting Started ................................................................................................................................................ 5
3.1. Sealing Method...................................................................................................................................... 5
4. Calibration Mode ............................................................................................................................................. 6
4.1. General Calibration ............................................................................................................................... 6
4.1.1. C4 Setting .................................................................................................................................... 7
4.1.1.1. C4-1 Setting ............................................................................................................................. 7
4.1.2. SPAN Calibration Setting (C-3) .................................................................................................. 8
4.1.3. Gravity Constant Value Setting (C-9) ........................................................................................ 8
4.1.4. Calibration factor Setting (C-10)................................................................................................ 8
4.1.6. Percent Calibration (C-7) ........................................................................................................... 9
4.1.7. Battery Calibration (C-8) .......................................................................................................... 10
5.The Schematics and Diagram ........................................................................................................................ 10
5.1.System Block Diagram ......................................................................................................................... 10
5.2.Circuit Diagram..................................................................................................................................... 11
5.2.1.Main PCB .................................................................................................................................... 11
5.2.2.Power PCB(Main PCB) ............................................................................................................... 12
6. Servicing & Parts Replacement.................................................................................................................... 12
6.1. Trouble Shooting................................................................................................................................. 12
6.2. Error Message..................................................................................................................................... 13
7. Options Installing........................................................................................................................................... 14
7.1. Serial Interface(RS-232C) .................................................................................................................. 14
6.2. Serial Interface(RS-232C) .................................................................................................................. 14
8. ROM Download Method................................................................................................................................. 15
9. Exploded Views & Parts List........................................................................................................................ 17
9.1. Exploded View .................................................................................................................................... 17
9.2. Loadcell Ass’y..................................................................................................................................... 19
9.3. Main PCB Ass’y (Top) ........................................................................................................................ 20
9.4. Main PCB Ass’y (Bottom) ................................................................................................................... 20
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Service Manual – PB Series REV NO : 3
1. Proper Operation / Introduction
1.1. Preface Thank you for purchasing of our CAS scale.
This scale has been designed with CAS reliability, under rigid quality control
and with outstanding performance.
WE hope that your departments enjoy with high quality of CAS product.
This manual will help you with proper operations and care of the PB(Portable Bench).
Please keep it handy for the future references.
1.2. Precaution • Make sure that you plug your scale into the proper power outlet.
• Place the scale on a flat and stable surface.
• Plug into a power outlet 30 minutes before operations.
• Keep the scale away from strong EMI noises may cause incorrect weight readings.
• This scale must be installed in a dry and liquid free environment.
• Do not subject the scale to sudden temperature changes.
• Do not subject the platter to sudden shocks.
• If the scale is not properly level, please adjust the 4 legs at the bottom of the scale (turn
legs clockwise or counterclockwise) so as to center the bubble of the leveling gauge
inside the indicated circle.
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Service Manual – PB Series REV NO : 3
2. Classification
2.1. Overall View
2.2. Display Pad (Key Pad) 2.2.1. PB
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Service Manual – PB Series REV NO : 3
Key Function
ZERO (-O-)
[Set]
To set zero point
To do [SET] key in the SETUP mode.
TARE To input or cancel the tare (the weight of container).
HOLD To make the weight of item stable. This weight is average value.
POWER To turn on or off.
3. Getting Started
3.1. Sealing Method
-
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Service Manual – PB Series REV NO : 3
4. Calibration Mode
4.1. General Calibration Pressing and holding calibration switch press [POWER] key to go to calibration mode.
User can move to other mode by using [ZERO] key in the calibration mode.
User also moves to other sub-modes for each mode by using [TARE] key.
Please simply follow below procedure to move to other mode.
(1) Calibration Mode: Pressing and holding “Calibration Switch” press [POWER] key.
(2) It displays “CAL-0” after “CAL”, and it blinks the version of scale three times.
(3) Selecting menu: press [TARE].
(4) ENTER(Setting) : [TARE] key
MODE Function
CAL 1 Display normalized AD
CAL 2 Display Keypad infomation-
CAL 3
Weight Setting Mode
“UnLoad” [TARE] → →
“MIDD” [TARE] after loading for 1/3 weight → →
“FULL” [TARE] after loading for Full weight → →
“MIDD” [TARE] after loading for 1/3 weight “END”→ →
CAL 4 Option Setting ( Refer to Table 1)
CAL 5 Display filtered Raw AD
CAL 7 % Calibration
CAL 8 Battery calibration
CAL 9 Gravity constant
CAL 10
Set calibration factor “Unit” [TARE] select 0, 1 (0:kg, 1: lb) [TARE] “CAPA” [TARE] select capacity [TARE] “MCAPA” [TARE] select mid-capacity [TARE] “W-dP” [TARE] Select Decimal Point [TARE] “ 1 d ” [TARE] Select division [TARE] “Dual” [TARE] Enable dual interval (0:disable, 1:enable) [TARE] “tare” [TARE] Enable custom tare (0:disable, 1:enable) [TARE]
CAL 11 Set nation(00 : OIML , 01 : NTEP , 02: KOREA)
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Service Manual – PB Series REV NO : 3
4.1.1. C4 Setting 4.1.1.1. C4-1 Setting
3 5%
2 10%
1 3% BIT 6~7 Initial Zero range
0 2%
0 Disable BIT5 Last digit enable
1 Enable
0 ±3% key zero percent BIT4 Key zero percent
1 ±2% key zero percent
3 (+), (-) All Direction successive Tare
2 (+) Direction successive Tare
1 (-) Direction successive Tare BIT 2~3 Successive tare
0 One Time tare
0 Gross zero indication
1 Net zero indication BIT0~1 Zero mark type
2 Both(gross and net) zero indication
4.1.1.2. C4-3 Setting
0 "." dot BIT7 Dot Type
1 "," comma
0 Don't use BIT6
Use Preset tare
(PB can’t use) 1 Use
0 Don't use BIT5 Use Back light
1 Use
0 Don't use BIT4
Use Head message
(PB can’t use) 1 Use
0 Don't use BIT3 Use gram
1 Use
0 Don't use BIT2 Use oz
1 Use
0 Don't use BIT1 Use lb
1 Use
0 Don't use BIT0 Use Kg
1 Use
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Service Manual – PB Series REV NO : 3
4.1.2. SPAN Calibration Setting (C-3) (1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL 1” message.
(2) Press [ZERO] to display “CAL-3”.
(3) Press [TARE] key and then it displays “zero ” message.
(4) Press [TARE] key and then it displays “midup” message
(5) Load middle weight (ex:1/3 full capacity) on the platform
(6) Press [TARE] key and then it displays “span ” message
(7) Load full weight on the platform
(8) Press [TARE] key and then it displays “middn” message
(9) Load middle weight (ex:1/3 full capacity) on the platform
(10) Press [TARE] key and then it display “CAL 3” message
4.1.3. Gravity Constant Value Setting (C-9) Current gravitational Acceleration value is set to 9.7994 m/s2 .
(11) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL-1”
message.
(12) Press [ZERO] to display “C-9”.
(13) Press [TARE] key, and then “ G-1“ message and “9.7994” will be shown. The first
digit,”9” will blink.
(14) Input a gravitational acceleration value by using [ZERO] key.
(15) Press [TARE] key, and then “G-2“ message blinks.“9.7994” will be shown. The first
digit,”9” will blink.
(16) Input a gravitational acceleration value by using [ZERO] key.
(17) Press [TARE] key to save the gravitational acceleration value, and “C-9 ” message will be
shown.
4.1.4. Calibration factor Setting (C-10) (1) Pressing and holding “Calibration Switch” press [POWER] key.
(2) After “CAL” message blinks three times and shows the version of scale, it displays “CAL-1”
message.
(3) Press [ZERO] to display “C-10”.
(4) Press [TARE] key, and then “UNIT “ message and “0” will be shown. The first digit,”0”
will blink. It means calibration unit is “kg” (0 : kg, 1 : lb)
(5) Input a calibration unit by using [ZERO] key.
(6) Press [TARE] key, and then “CAPA“ message blinks.“0015” will be shown. The first digit,”0”
will blink. It means a full-capability is “15 (calibration unit, kg or lb)”
(7) Input a capability by using [ZERO] key.
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Service Manual – PB Series REV NO : 3 (8) Press [TARE] key, and then “MCAPA“ message blinks.“0005” will be shown. The first
digit,”0” will blink. It means a mid-capability is “05 (calibration unit, kg or lb)”
(9) Input a capability by using [ZERO] key.
(10)Press [TARE] key, and then “W-dP “ message blinks.“3” will be shown. The first digit,”3”
will blink. It means a weight decimal point is “3 (will display 0.000)”
(11)Input a weight decimal point by using [ZERO] key.
(12) Press [TARE] key, and then “1d “ message blinks.“0.005” will be shown. The third
digit,”0” will blink. It means a division is “0.005 (calibration unit, kg or lb)”
(13) Input a division by using [ZERO] key.
(14) Press [TARE] key, and then “dual “ message blinks.“1” will be shown. The third digit,”1”
will blink. It means a dual interval is disable. (0 : disable, 1 : enable)”
(15) Input a dual interval enable by using [ZERO] key.
(16) Press [TARE] key to save the calibration factor, and “ C-10 ” message will be shown.
- CAL METHOD (SPAN ,%)
- PROGRESSED TEST FACTS IN CAL MODE
- SETTING IS RELATED TO KEY VALUE
- SETTING FACTS IN THE OTHER CAL MODES (Gravity setting)
- SETTING FACTS IN SET MODE: INCLUDE A FUNCTION
4.1.5. Displaying Real A/D Value (C-5) Display Raw AD
4.1.6. Percent Calibration (C-7) (1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL 1”
message.
(2) Press [ZERO] to display “CAL-7”.
(3) Press [TARE] key and then it displays “per 0 ” message. Select the percent value using the
[numeric] key. You can choose 10~90 percent. (Last digit of percent must be 0.)
(4) Press [TARE] key and then it displays “zero” message
(5) Press [TARE] key and then it displays “pspan ” message
(6) Load choice percentage weight of full weight on the platform
(7) Press [TARE] key and then it displays “CAL 7” message
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Service Manual – PB Series REV NO : 3
4.1.7. Battery Calibration (C-8) (1) Pressing and holding “Calibration Switch” press [POWER] key.
After “CAL” message blinks three times and shows the version of scale, it displays “CAL 1”
message.
(2) Press [ZERO] to display “CAL-8”.
(3) Press [TARE] key and then it displays voltage of battery.
(4) Change the jumper-pin of main PCB, ‘BAT’ to ‘+5V’.
(5) Press [ZERO] key two times and then Press [-] key two times.
And then it display ‘500’
(6) Change the jumper-pin of main PCB, ‘+5V’ to ‘BAT’.
(7) You can see the calibrated voltage of battery.
5.The Schematics and Diagram
5.1.System Block Diagram
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Service Manual – PB Series REV NO : 3
5.2.Circuit Diagram
5.2.1.Main PCB
TP6
TP-B1
TP7
TP-B1
KEY & BUZZER PART
Q1 KTA1666
SOT892
1
3BK1
LED_BLDBB_BL5_Bty pe
2 1468
357
BUZZER
C2100uF/16VCE66N
Q3KTA1504
SOT23-21-3
2
13
S5
CAL_SWSSW1
2
R12
10kΩ
R11
100kΩR13
10kΩR14100kΩ
BL_CON
TARE
ZERO
BL_CON
R15 100kΩBUZZER
+3.3V
+3.3V
+3.3V+3.3V
C101nF
C81nF
C91nF
R18 100kΩ
R19 100kΩ
Q2
2N2222SOT23-21-3
2
31
R20 100kΩ
TARE
C30.1uF
C40.1uF
C70.1uF
C50.1uF
U2A
max3232idbre4MTC16
V-6
RIN28
C2- 5
RIN113
V+2
C2+ 4ROUT2 9
GN
D15
ROUT1 12DOUT2 7
C1-3
DOUT1 14
C1+1
DIN210 DIN111 V_C
C16
C60.1uF
Tx
RxCON_TX
CON_RX
S1 ZERO
1 2
ZERO
S2 TARE
1 2
R5 100Ω
S3 HOLD
1 2
R7 100Ω
Title
Size Document Number Rev
Date: Sheet of
0.3
PB-LCD MAIN CIRCUITB
1 2Monday , December 22, 2008
+3.3V
CON_TX
+5V
BAT_CHK
POWER_CHK
VOLT_CHK
R16100kΩ
JP1
SIP\2P12
R17100kΩ
6100-PPB-0000-0
BZ1
SIG_IN+
SIG_IN-
+5V
LCD_DATA
LCD_WR
LCD_CS
R1 10Ω
MODULE CONNECTOR PART
CAL PARTPROGRAM PART RS232 CONNECTOR PART
LOADCELL PARTU10
OneModuleONE_MODULE_MOLDING
A_Vcc1
A_GND2
Bat_chk3
P1.64
P1,75
Rx6
Tx7
P3.28
P3.39
P3.410
P3.511
P3.612
P3.713
P2.014
P2.115
P2.216
P2.317
P1.118
AIN+ 36
AIN- 35
A_GND 34
P1.0 33
P0.0 32
P0.1 31
P0.2 30
P0.3 29
P0.4 28
P0.5 27
P0.6 26
P0.7 25
PSEN 24
I2C_SDA 23
I2C_CLK 22
D_Vcc 21
D_GND20
RTC_Power19
PSEN
Rx
CAL
Tx
+3.3V
POWER_CON
CAL
CN2
RJ11-ModularJack-6p
11
2 2
3 3
4 4
5 5
6 6
HOLD
S12
S15S14S13
S18S17S16
S21S20
LCD_DATA
LCD_WR
LCD_CS
S19
C0
S23S22
S23S22
C3C2C1
S16S17S18S19S20S21
S14S15
S8S9S10S11S12S13
S4S5S6S7
C2C3S0S1S2S3
+5V
C0C1
C1
0.1uF
R10
2.2kΩ
L6
1 2
+5V
U1
HT1621b48PIN-TMP
SEG71
SEG62
SEG53
SEG44
SEG35
SEG26
SEG17
SEG08
CS9
RD10
WR11
DATA12
VSS13
OSCO14
OSCI15
VLCD16
VDD17
IRQ18
BZ19
BZ20
COM021
COM122
COM223
COM324
SEG8 48
SEG9 47
SEG10 46
SEG11 45
SEG12 44
SEG13 43
SEG14 42
SEG15 41
SEG16 40
SEG17 39
SEG18 38
SEG19 37
SEG20 36
SEG2135
SEG22 34
SEG2333
SEG24 32
SEG25 31
SEG26 30
SEG27 29
SEG28 28
SEG29 27
SEG30 26
SEG31 25
CN1
LC5PINA
1
2
3
4
5
DISPLAY & BACK LIGHT PART
SIG-
SIG+
EX-
EX+L1
1 2
LCD1LCD_MW_CAS_28P
123456789
10111213141516171819202122232425262728
FG
L5
1 2
L2
1 2
L3
1 2
S1S0
S4S3S2
SIG_IN-
SIG_IN+
R8 100Ω
R6 100Ω
L4
1 2
S5
R9 100Ω
S8S7S6
S11S10S9
PSEN
CON_RX
HOLD
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Service Manual – PB Series REV NO : 3
5.2.2.Power PCB(Main PCB)
U4 XC6204C502MRSOT-25
VIN1
VSS
2
CE3VOUT 5
R38100kΩ
CN5
DRY BATMX5267-2
12
D101N5819
DO-214AC(SMA)
C24470uF/25VCE12.5N
C23470u/25VCE12.5N
Pb 6V/1.25A
Mg 1.5V/2.85A×4
+9V
R31 100kΩ
R282.2kΩ
-
+
U9B
LM393SO8-3.9MM
5
67
84
+9V
-
+
U9A
LM393SO8-3.9MM
3
21
84
+9V
BATT
D9
LED BI-COLOUR2TONE-LED
1 32
R352.2kΩ
+9VR33
10kΩ
R34
100kΩ
R3647kΩ
R30
1kΩ
R27
33kΩ
+9V
CN4
Pb BATMX5267-2
12 POWER-Red
POWER-Green
C27100uF/16VCE66N
C14100uF/16VCE66N
D8
KDS184SOT23-21-3
21
3
R23100kΩ
+3.3V
R310kΩ
FUSE1
FASTBLOW / 1.6A 250V
FUSEHOLDER2
1 234
U8 XC6204C332MRSOT-25
VIN1
VSS
2
CE3VOUT
5
C260.1uF
C280.1uF
Power PARTVOLT_CHK
BAT_CHK
Title
Size Document Number Rev
Date: Sheet of
6100-PPB-0000-0 0.3
PB LCD POWER CIRCUIT DIAGRAM
A3
2 2Monday , December 22, 2008
BATT
R2410kΩ
D7SS14DO-214AC(SMA)
U6 MC34063ASO8-3.9MM
COMP5
TCAP 3VCC6
GND 4
DC8
PK7
SWC1
SWE2
L8 220uHCOIL470
POWER_CHK
POWER_CON
C130.1uF
D1
SS14DO-214AC(SMA)
D4
SS14DO-214AC(SMA)
D5
SS14DO-214AC(SMA)
R26100Ω
C22470pFC0805I
R321kΩ
R220.33Ω 2WR1W
R252.2kΩ
R29100kΩ
+5V
D6
1N5406DO-201AD
1 2
C250.1uFC0805I
L9
FERITEEMI-BEAD
CN3
Adaptor
SIP-3P-H
123
S4ON/OFFSSW
12
Charge
RECHARGEABLE BATTERY +5V
TP5
+3.3V
1
+3.3V
TP2
IN
1
TP3
GND
1
C15220uF/16VCE66N
D2
MA2Q735
L7
22uHIDT-CR54
JP2
12
TP4
BAT
1
C1247uF/16VTantal
JP3
12
C16
0.1uF
C17330uF/25VCE10X5N
A_Vcc
U7
XC6368A503MR
EXT5
VDD2
CE3 VOUT 1
GN
D4
C110.1uF
(+5V , Bat)전원사양
U3 LM7809TR\TO252-3
IN1 OUT 3
GN
D4
Q5
2N2222SOT23-21-3
2
31
+9V
Q4 KTA1666
SOT892
1
3
Q6XP161A1265PR
SOT893
1
2
R39100kΩ
R21 10kΩ
C18
0.1uFC0805I
Charge indication PART
R3747kΩ
TP1
+5V
1
R4100kΩ
6. Servicing & Parts Replacement
6.1. Trouble Shooting
SYMPTOM PROBABLE CAUSE REMEDY
ERROR 0 (unstable error)
1)The Scale is not put on the flat
part.
2)A Vibration or wind is exist
around The Scale.
- Check a foot. (Foots are must
all touched in flat part.)
-Check a PCB’s field ground.
(Field ground is must connected
to platform.)
ERROR 1(initial zero) 1)The Scale is not operate
Calibration
2)Cable is not connected
between Loadcell and PCB.
-Operate Calibration.
-Check a L/C and PCB. (L/C and
PCB are must connected.)
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Service Manual – PB Series REV NO : 3 Batt -> Error 0 1)ONEMODULE(A/D Converter)
is damaged.
2)The Scale is not operate
Battery Calibration
-Check a battery voltage(C-8)
and then operate a battery
calibration.
-Check the A/D value. (C-1) If
place a weight, A/D value have to
changed.
NOT OPERATION(POWER OFF) 1)Power ON/OFF Key is
damaged.
2) Battery discharge or not
connected.
3)Fuse is down.(Open)
4)Power cable is down.
-Check a output voltage, holding
a Tact S/W.
-Check a battery connection and
Battery voltage.
-Check a fuse connection
6.2. Error Message
ERROR LIST REASONS SOLUTION
"Err 0" The "Err 0" occurs when scale is not stable. Remove unstable facts.
"Err 1" The "Err 1" occurs when a current zero point has shifted from the last span calibration.
Please call your CAS dealer.
"Err 2" The "Err 2" is not a real error. Only it prompts return CAL switch to the normal position.
Please call your CAS dealer.
"Err 3" The "Err 3" is an overload error. Please remove the weight.
"Err 9"
The "Err 9" is no weight error. When scale is in counting mode, you must load the weight.
If you have no weight on your scale, you can see this error message.
Please load the weight on your tray.
“Err 11”
The "Err 11" means a writing error of the internal nonvolatile memory. To recognize this error, be sure to check the voltage on the circuit and do calibration procedures.
If it still has "Err 11", replace the digital module.
“Err 12” The "Err 12" warns that the scale has lost the parameters for weighing regulations or has lost the factors for a digital span calculation.
Enter each condition codes again.
Please try a span calibration again if still not fixed.
“Err 14” The "Err 14" means calibration range is not correct. Please call your CAS dealer.
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Service Manual – PB Series REV NO : 3
7. Options Installing
7.1. Serial Interface(RS-232C)
6.2. Serial Interface(RS-232C)
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Service Manual – PB Series REV NO : 3
8. ROM Download Method
(1) Connect a RS-232C Cable, between the scale and PC and then excute a O/M Downloader
program.
(2) Check a ‘Communication port’ and click the ‘Init. Erase Command’. And then Click the ‘Start
Download’, Communication port will be “Ready” status.
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Service Manual – PB Series REV NO : 3
(3) Push a ‘Open ROM File’ button and then open the ROM File.
(4) If click the ‘Start Download’ holding a power ON/OFF key, You will see ROM Downloading
display and then ROM download will be finished.
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Service Manual – PB Series REV NO : 3
9. Exploded Views & Parts List
9.1. Exploded View 9.1.1. Display Ass’y