AAGG--337700

SERVICE MANUAL

AM/FM Stereo Receiver

Effective : April, 2003 S-0091A

NOTES

● PC boards shown are viewed from parts side.● The parts with no reference number or no parts number in the

exploded views are not supplied.● As regards the resistors and capacitors, refer to the circuit diagrams

contained in this manual.●£ Parts marked with this sign are safety critical components. They

must be replaced with identical components - refer to the appropriateparts list and ensure exact replacement.

CONTENTS1 SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・22 ADJUSTMENTS AND CHECKS ・・・・・・・・・・・・・・・・・・・・・・・・33 EXPLODED VIEWS AND PARTS LIST ・・・・・・・・・・・・・・・・・64 PC BOARDS AND PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・8

1 SPECIFICATIONS

－2－

Amplifier SectionOutput Power .... 50 + 50 watts RMS (0.9 % THD, 1 kHz, 8 ohms)Total Harmonic Distortion.................... 0.05 % (at 45 watts,1 kHz)Input Sensitivity/Impedance .................. PHONO: 4 mV/22 kohms

LINE: 270 mV/20 kohmsFrequency Response.................... PHONO: 20 Hz–20 kHz, +/–3 dB

LINE: 20 Hz–30 kHz, +1/–3 dBSignal-to-Noise Ratio.............................................. PHONO: 60 dB

LINE: 68 dBTone Control .......................................... BASS: +/–9 dB at 100 Hz

TREBLE: +/–7 dB at 10 kHzLoudness Control (Volume at –40 dB Position) ..............................

+7 dB at 100 Hz, +5 dB at 10 kHz

FM Tuner Section(Without notes 98.1 MHz, 65 dBf)

Tuning Range .................... 87.5 MHz–108.0 MHz (100 kHz steps)Usable Sensitivity (IHF) ............................................ Mono: 20 dBf50 dB Quieting Sensitivity ................ Mono: 39 dBf, Stereo: 46 dBfCapture Ratio ...................................................................... 2.8 dBImage Rejection Ratio .......................................................... 20 dBAM Suppresion Ratio............................................................ 48 dBHarmonic Distortion (1 kHz) .............. Mono: 0.4 %, Stereo: 0.5 %Frequency Response................................ 30 Hz–15 kHz, +2/–3 dBStereo Separation (1 kHz) .................................................... 35 dBSignal-to-Noise Ratio ........................ Mono: 57 dB, Stereo: 55 dB

AM Tuner SectionTuning Range .......................... 520 kHz–1,720 kHz (10 kHz steps)Usable Sensitivity ............................................................ 55 dB/mTotal Harmonic Distortion .................................... 1 % at 85 dB/mSignal-to-Noise Ratio............................................................ 48 dB

GeneralPower Requirements.................................. 120 V/230 V, 50-60 HzPower Consumption ............................................................ 120 WAC Outlet .......................... Unswitched x 1, 100 W max (1 A max)Dimensions (W x H x D) ........................ 17-1/8" x 5-1/8" x 12-5/8"

(435 x 130 x 320 mm)Weight (net) .................................................. 15-7/16 lbs (7.0 kg)Standard Accessories .................................. AM Loop Antenna x 1

FM ”T” Type Antenna x 1

• Design and specifications are subject to change without notice.

Voltage Conversion(General export models only)

Be sure to remove the power cord from the AC outlet beforerepositioning the voltage converter switch.

1. Locate the voltage selector on the rear panel.2. Using a flat-bladed screwdriver, set to the appropriate

230V or 120V position according to your area.

IN NORTH AMERICA USE ONLY ON 120 V SUPPLY.

2 ADJUSTMENTS AND CHECKS

－3－

2-1 AMPLIFIER SECTION

Bias Current Adjustment

1. Turn the unit on, and set the input selector switch to "CD".2. Set 7VR1 and 7VR2 to the center position.3. Connect the DC voltmeter as shown below after preheating for

10 minutes, and adjust 7VR1 (Lch) so that the voltagebecomes 3.3±1.3mV.

4. Adjust 7VR2 (Rch) in the same way.

7VR17VR2

7R46 7R44 7R45 7R43

0.33/5W 0.33/5W 0.33/5W 0.33/5W

MAIN PCB

DC voltmeter DC voltmeter

－4－

ITEMSETTING ADJUSTMENT

POINTS ADJUST

2. AM Sensitivity

∫600 kHz/1500 kHz50 dB/m400 Hz (30 % Mod)

çREC OUT

AM 600 kHz 2T1 (BLK) Max.

3. AM IF

∫1000 kHz50 dB/m400 Hz (30 % Mod)

çREC OUT AM 1000 kHz 2T3 (WHT) Max.

4. FM Sensitivity

∂90 MHz10~20 dBf1 kHz (100 % Mod)

ƒREC OUT FM 90 MHz 2L2 (4.5T) Max.

5. FM Distortion

∂98 MHz60 dBf1 kHz (100 % Mod)

©REC OUT FM 98 MHz 2T4 (PINK) Min. distortion

6. FM Stereo

∂é98 MHz60 dBfStereo signal L-R

©REC OUT FM 98 MHz 2T5, 2T6 Min. distortion

1. VT Adjustå2R19 (VT)2J2 (GND)

FM 87.5 MHz 2L3 (3.5T) DC 1.0±0.05V

INPUT OUTPUT AG-370

After adjusting 2TC2, readjust 2T1 at 600 kHz.

AM 1500 kHz 2TC2 Max.

AM 1720 kHz

AM 530 kHz

FM 108.0 MHz

Check

2T2 (RED)

Check

≦ 8.0V

DC 1.1±0.05V

DC 8.0±0.5V

2-2 TUNER SECTION

－5－

AC VoltmeterFM Signal Generator

Stereo Signal Generator

Distortion Analyzer

D

E

G

F

AC Voltmeter

AM Signal Generator

B

C

AM LoopAntenna

60cm

2T3

2T6

2T5

2T2

2T1

2T4

2L2

2L3

2TC2

2R192J2 TUNER PCB

+ －

DC VoltmeterA

3 EXPLODED VIEWS AND PARTS LIST

－6－

1

23 4

5

6

7

8

9

q

w

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y

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－7－

EXPLODED VIEW LIST

REF.NO. PARTS NO. DESCRIPTION REMARKS

1 9A06536200 MASTER VR KNOB 53W360900 2 9A06900300 INDICATOR 510104200 3 9A09581400 TONE CONTROL KNOB 530503000 4 9A09580800 DISPLAY LENS 510503600 5 9A09580700 PANEL 510503500

6 9A09580900 FUNCTION KEY 530502500 7 9A09581200 MEMORY KEY 530502600 8 9A09581000 BAND KEY 530502900 9 9A09592000 SILICON RUBBER,T0-3P2 322228370 10-1 £ 9A09590200 TR,2SD1047E 230104705

10-2 £ 9A09590300 TR,2SB817E 230817005 11 9A09581100 TUNING KEY 530502800 12 9A06536000 LOUD KNOB 53W360700 13 9A09581300 AUTO/MANUAL KEY 530502700 14 9A09592900 VFD DISPLAY 250370000

15 9A09579810 HEADPHONO PCB ASSY 033700601 16 9A09579910 SELECT PCB ASSY 033700401 17 9A07063400 SPEAKER SWITCH KNOB 53W361000 18 9A09580010 SELECT PCB ASSY 033700501 19 £ 9A06602800 POWER SWITCH 180222501

20 9A06535900 POWER KNOB 530049400 21 9A09579410 CONTROL PCB ASSY 033700201 22 9A06536400 LEG(GOLD) 540082601 23 9A06536300 LEG(BLACK) 540082600 24 9A09581600 BOTTOM COVER 520504800

25 9A06901000 SIDE BRACKET(L) 52W360300 26 9A09581800 SIDE BRACKET(R) 520505100 27 9A09581900 TOP COVER 520505000 28 9A09579310 MAIN PCB ASSY 033700101 29 9A09591800 HEAT SINK(A) 560502100

30 9A06901200 H/S BRACKET 540082800 31 9A09581700 REAR COVER 520504900 32 £ 9A09580100 POWER TRANSFORMER 157631522 33 9A06904300 GND TERMINAL,M3 320018601 34 £ 9A06900600 CORD BUSHING 550011700

35 £ 9A06602900 AC SOCKET 26CS18401 36 9A07064400 SPACER SUPPORT 550098819 37 9A09579510 TUNER PCB ASSY 033700301 38 9A09591700 CABLE CLIP 550505500 39 9A09591600 PCB SUPPORT 550505200

40 9A06900700 NAME PLATE 510104300 41 £ 9A09580200 AC POWER CORD 210183011 42 9A09579610 POWER SOCKET PCB ASSY 033700701 43 9A09579710 POWER SELECT SW PCB ASSY 033700801 44 £ 9A09587200 C,275V 0.01UF 136M103M2

INCLUDED ACCESSORIES

REF.NO. PARTS NO. DESCRIPTION REMARKS

9A09471700 OWNER'S MANUAL,EFSP 600520205 9A06902500 FM ANT 59W360100 9A06902600 AM ANT 59W360200

－8－

4 PC BOARDS AND PARTS LIST

MAIN PCB

－9－

SP SEL PCB SP SEL PCB HEADPHONE PCB POW SEL PCB POWER PCB

FRONT PCB TUNER PCB

MAIN PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579310 MAIN PCB ASSY 9A09592100 MAIN PCB 9A06534100 SP JACK 9A06534200 RCA JACK,6P 9A06534300 RCA JACK,4P

9A06896100 FUSE CLIP 9A06897300 LEAD PIN,3P 9A06901200 H/S BRACKET 9A09591600 PCB SUPPORT 9A09591700 CABLE CLIP

9A09591800 HEAT SINK(A) 9A09591900 HEAT SINK(B) 9A09592000 SILICON RUBBER,T0-3P2

1C1 £ 9A09586700 C,ELEC 35V 100UF M 1C4-5 £ 9A09586600 C,ELEC 25V 2200UF M

1C12 £ 9A09586500 C,ELEC 25V 100UF M 1C14-15 £ 9A09587000 C,ELEC 58V 6800UF M 1D1-8 £ 9A09589300 DIODE,IN4004 1D9-12 £ 9A09589400 DIODE,IN5404 1D13-14 9A09589500 DIODE,IN4148

1D15-18 £ 9A09589300 DIODE,IN4004 1D19 9A09589100 DIODE,ZENER 24V 1W 1FU1-2 £ 9A09591200 FUSE,5A 250V SLOW BLOW1N1 £ 9A09590800 IC,L7812CV 1N2 £ 9A09590900 IC,L7912CV

1N3 £ 9A09590700 IC,L7805CV 3D1-2 9A09588800 DIODE,ZENER 6V8 1/2W 3N1 9A09590400 IC,TC4052BP 3N2 9A09590500 IC,TC4066BP 3V1-3 9A09589600 TR,2SC1815GR

4N1 9A09590600 IC,4560D 5N1 9A09590600 IC,4560D 6N1 9A09590600 IC,4560D 7C28 £ 9A09587100 C,ELEC 63V 47UF M 7D1-4 9A09589000 DIODE,ZENER 24V 1/2W

7D5-6 9A09589500 DIODE,IN4148 7D7 9A09589200 DIODE,ZENER 30V 1/2W 7D8 9A09589500 DIODE,IN4148 7D9 9A09588900 DIODE,ZENER 12V 1/2W 7L1-2 9A09591000 COIL,SPRING 1.5UH

7R43-46 £ 9A09585600 R,CEMENT 5W R33 J 7R61-62 £ 9A09585400 R,2W 6R1 J 7R70 £ 9A09585300 R,0.5W 100 J 7R77-78 £ 9A09585500 R,2W 10 J 7V1-4 9A09589700 TR,2N5551

7V5-10 9A09589800 TR,2N5401 7V11-14 9A09589700 TR,2N5551 7V15-16 9A09589900 TR,3DA4381 7V17-18 9A09590000 TR,3CA1667 7V19-20 £ 9A09590200 TR,2SD1047E

7V21-22 £ 9A09590300 TR,2SB817E 7V23-24 9A09589700 TR,2N5551 7V25 9A09589800 TR,2N5401 7V26-29 9A09590100 TR,2SC8050D 7VR1-2 9A09585700 VR,SEMI-FIXED 300 J REL1 9A09591100 RELAY,12V 5A

CONTROL PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579410 CONTROL PCB ASSY 9A09593800 FRONT PCB 9A09592900 VFD DISPLAY 9A09593900 VFD SHIELD CASE

6S1 9A09593000 SW,LOUDNESS

6VR1-2 9A06534400 VR,100KBX2 6VR3 9A06604000 VR,50KAX2 6VR4 9A06534500 VR,100KW 8D1 9A09589500 DIODE,IN4148 8D2 9A09592400 DIODE,ZENER 5V1 1/2W

8D3-8 9A09589500 DIODE,IN4148 8G1 9A09592800 OSC,CRYSTAL 4.433M8N1 9A09592500 IC,HT48R50A-1 8N2 9A09592600 IC,HT24LC02 8N3 9A09592700 IC,PT6312LQ SW1-20 9A09593100 SW,TACT

TUNER PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579510 TUNER PCB ASSY 9A09625000 TUNER PCB 9A09625100 TUNER SHIELD CASE

2D1-2 9A09589500 DIODE,IN4148 2G1 9A09622100 FILTER,CERAMIC L10.7MS2 R

2G2 9A09622200 FILTER,CERAMIC SFU450B 2G3 9A09622100 FILTER,CERAMIC L10.7MS2 R2G4 9A09622300 OSC,CRYSTAL 4.5MHZ2L1 9A09622400 COIL,SPRING 3.5T M4.5 2L2 9A09622500 COIL,SPRING 4.5T M3.5

2L3 9A09622600 COIL,SPRING 3.5T M3.5 2L4 9A09622700 INDUCTOR,AL0410 1022L5 9A09622800 INDUCTOR,AL0410 2212N1 9A09622900 IC,TA2149N 2N2 9A09623000 IC,TC9257F

2T1 9A09623800 IFT,AM RF10B(BLK) 2T2 9A09623900 IFT,AM OSC 7B(RED) 2T3 9A09624000 IFT,AM IFT 7B(WHT) 2T4 9A09624100 IFT,FM DET 7B(PNK) 2T5-6 9A09624200 IFT,MPX 8B(BLK)

2TC2 9A09624300 SVC,CYM1-2/7 2V1 9A09624400 FET,2SK161GR 2V2 9A09624500 TR,2SC9018I 2V3 9A09624600 TR,2SC9014C 2V4-5 9A09589600 TR,2SC1815GR

2V6-7 9A09624600 TR,2SC9014C 2V8 9A09624700 TR,2SC9018H 2VD1-2 9A09624800 DIODE,VARACTOR V1043 2VD3-4 9A09624900 DIODE,VARACTOR V149B 2X1 9A07129000 ANT JACK

－10－

SELECT PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579910 SELECT PCB ASSY 9A09626300 SP SEL PCB

2S1 9A09625800 SP SELECTOR SW

SELECT PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09580010 SELECT PCB ASSY 9A09626400 SP SEL PCB

2S2 9A09625800 SP SELECTOR SW

HEADPHONE PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579810 HEADPHONE PCB ASSY 9A09625700 HEADPHONE PCB 9A06901600 H/P JACK HOLDER

7D11-12 9A09589500 DIODE,IN4148 7K1 9A06535000 HEAD PHONE JACK 7R75-76 £ 9A06889700 R,1/2W 330

POWER SELECT SW PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579710 POWER SELECT SW PCB ASSY9A09625400 POW SEL PCB

£ 9A07069700 POWER CHANGE SWITCH

POWER SOCKET PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09579610 POWER SOCKET PCB ASSY 9A09625300 POWER PCB

£ 9A06602900 AC SOCKET 9A06896100 FUSE CLIP

FU1 £ 9A09625200 FUSE,2.5A 250V SLOW BLOW

－11－

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-370 MAIN PCB (1/2)

1 st Issue; January 2003

123456

1XS1

6VR

410

0K

+12

-12V

-12V

+12+12

-12V

-12V

+12

4C18220

4C17220

4R16100K

4R15100K

3D26V8

3D16V8

1I/O

1

1O/I

2

2O/I

3

2I/O

4

2C5

3C6

VSS

73I

/O8

3O/I

9

4O/I

10

4I/O

11

4C12

1C13

VD

D14

3N2

CD

4066

4R12180K

4R4390

6C14U7/50V

6N1-24558D

6N1-14558D

6C16104

6C15104

6C14102

6C13102

6C6820

6C5820

6C847

6C747

6C4153

6C3153

6C12

4U7/

50V

6C114U7/50V

6C10 100U/16V

6C9 100U/16V

6C24U7/50V

6R24100

6R131K

6R141K

6R71K

6R81K

6R1 10K

6R2 10K

6R9 15K

6R10 15K

6R510K

6R610K

6R3 33K

6R4 33K

6R1133K

6R1233K

6R15

1K6R16

1K

6R175K6

6R185K6

6R19

5K6

6R20

5K6

6R22

1K6R

211K

4R18 1004C20100U/16V

4N1-24558D

4N1-14558D

5C24U7/50V

5C14U7/50V

5C8100U/16V

5C7100U/16V

5R141K

5R131K

5R12100

5R11100

5R1033K

5R933K

5R815K

5R715K

5R6100K

5R5100K

5R447K

5R347K

5R21K

5R11K

3C1471

3C2471

3C3471

3C4471

3C5471

3C6471

3C922

3C1022

3C7471

3C8471

3R81K

3R7 1K

3R6 3K9

3R5 3K9

3R4 3K9

3R3 3K9

3R2 3K9

3R13K9

4R141K

3C12

104

3C11

104

3V1C1815

3V3C1815

3V2C1815

CD/L

PHONO

CD/R

L

REC/L

AUX/L

AUX/R

TAPE/L

REC/R

TAPE/R

4R1470

4R2470

4R522K

4R622K

4C1471

4C2471

4C3181

4C4181

4C5

181

4C6

181

4C9102

4C10102

4C13223

4C14223

4C11562

4C12562

4R9 12K

4R10 12K

4R7270

4R8270

4C747U/16V

4C154U7

4C164U7

4C19100U/16V

4C847U/16V

4R131K

5C322U/16V

5C422U/16V

3R20

100K

3R933K

3R1033K

3R1133K

3R1233K

3R1333K

3R1433K

3R17 10K

3R18 10K3R1910K

5N1-14558D

5N1-24558D

6R23100

4R17100

4R3390

4R11180K

Y0

1

Y2

2

Y3

Y3

4

Y1

5

S6

VE

E7

VSS

8A

19

A0

10

X3

11

X0

12

X13

X1

14

X2

15

VD

D16

3N1CD4052

1 2 3

1XS6

3R21 33K

3R22 33K

3R15100

3R16 100

123

1XP10

123

1XS3

123

1XP3

6S1

6VR

350

KB

123

1XP46VR1-1100KB

6VR1-2100KB

6VR2-1100KB

6VR2-2100KB

6VR1

6VR2

123456

1XS2

RGL

43

2

43

2

56

1

56

1

R G L

6

41

7

3

2

5

LGR

BASS

TREBLE

BASS

TREBLE

8

76

5

43

21

6

5

7

4

R

12

3

8

1

3

2

45

67

8TAPE

SW1

SW2

LGR

BASS

TREBLEAND 1XP2

AND 1XP1

TO TUNER

AM/FM Stereo ReceiverAAGG--337700

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-370 MAIN PCB (2/2), HEADPHONE PCB, SP SEL PCB, POWER PCB, POW SEL PCB

7C3110P

7C3010P

S2

7R7810/2W

7R7710/2W

1 2

1XS10

1 2

1XP10

1 2 3

1XP9

1 2 3

1XS9

12345

1XP8

12345

1XS8

12345

1XP5

1 2 3 4 51XS5

123 1XS7

2S2SPB

1X1SPECKER

7V255401

S1POWER SW

C1103/250V

FU12.5A/250V

1C15

6800

U/5

0V

1R3

15K

1C14

6800

U/5

0V

1C16

104

1C17

104

1R2

15K 1D10

54041D115404

1D125404

1D95404

7C22104

7C28

33U

/50V

1D15

4004

1D18 4004

1D144148

7R6910K

7R70

100

7R7347K

7R74

47K

1C1310U/50V

1R5 22K

7C27220U/16V

7C26220U/16V

1D13

4148

7R7210K

7C254U7/50V

7C23102

7R63

56K

7R59

22K

7V298050D

7V288050D

7V278050D

7V268050D

7C21

104

7R62

5.1/

2W7R

6022

K

7R61

5.1/

2W

7R71

10K

7C1747U/25V

7R511K

7R1522K

7R19100

7R17100

7V15551

7R11K

7C14U7/50V

7R53K3

7R73K3

7R253K3

7R29220

7C5

47U

/63V

7V35551

7R9100

7R11100

7R1322K

7V95401

7V15669A

7V195200

7V211943

7V17649A

7V135551

7V115551

7V55401

7V75401

7C9104

7C1330P

7R313K3

7R331K5

7VR1300

7C1530P

7R35

220

7R213K3 7R23

3K3

7C747U/63V

7C11104

7R27

3K3

7R4933K

7R37220

7R3933

7R43

0.33

/5W

7R45

0.33

/5W

7R47100

7R41100

7V235551

7R53

3K3

7R55

27K

7C194U7/50V

7L11.5uH

7L21.5uH

7C204U7/50V

7R56

27K

7R54

3K3

7V245551

7R42100

7R48100

7R46

0.33

/5W

7R44

0.33

/5W

7R4033

7R38220

7R5033K

7R28

3K3

7C12

104

7C847U/63V

7R243K3

7R223K3

7R36

220

7C1630P

7VR2300

7R341K5

7R323K3

7C1430P7C10

104

7V85401

7V65401

7V125551

7V145551

7V18649A

7V221943

7V205200

7V16669A

7V105401

7R1422K

7R12100

7R10100

7V45551

7C6

47U

/63V

7R30220

7R263K3

7R83K3

7R63K3

7C24U7/50V

7R21K

7V25551

7R18100

7R20100

7R1622K

7R521K

7C1847U/25V

7R4100K

7C4

100P

7C3

100P

7R3100K

7C24

10U

/50V

7R672K7

7R68

3K3/

1W

7R64

220K

7D84148

7R65220K

7R66

4K7

1XP15

1XP17

1D14004

1D24004

1D34004

1D44004

1C1

100U

/35V

1C2104

1R1100

1XP16

1D54004

1D64004

1D74004

1D84004

1C4

2200

U/2

5V

1C5

2200

U/2

5V

1C6

104

1C7

104

1N378M05

1N1

7812

1N2

7912

1C8

104

1C9

104

1C10

1000

U/1

6V

1C11

1000

U/1

6V

1C3

470U

/16V

1D16

4004

1D17

40041R

42K

2

1C12

100U

/25V

REL1

1FU15A/250V

1FU25A/250V

1873245

7K1

7R75 330

7R76 330

123

1XS4

2S1SPA

7D730V

7D124V

7D3

24V

7D224V

7D4

24V

7D1012V

7R5718K

7D54148

7D64148

7R5818K

1 2

1XP12

12

1XP13

+12

-12V

7D114148

7D124148

7C29103/50V

1D19

24V1 2 3 4 5 6

1XS11

1C18

100U

/35V

1R6

100

B/R-

B/L-GA/R-

A/L-

RRGLL

R RGL

AC 120V/230V

SEL.SWVOLTAGE

DGND

SPA

SPB

-24V

0V AC

2.5V

2.5V

DGND

+5V

L

A/L-

A/R-

A/L+

A/R+

B/L+

B/L-

B/R+

B/R-

LGR

A/L-

A/R-GB/L-

B/R-

DG

SPB

SPB

DG B/L-

G B/R-

+5VG G

+12V

1 st Issue; January 2003AM/FM Stereo Receiver

AAGG--337700

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-370 TUNER PCB

1234

1XS14

2L3 3.5T

2L2 4.5T

2X1

2T5

2C5152

*2R12 1K

2C37

100U

/10V

2C28203

2L4102

2C20203

2D1IN4148

2L5221

2C43203

2C38100U/10V

1 2

1XS13

2C45203

2C24102

2R202K

2R21 2K

2R22 2K

2G44.5M 2R23

2K4

2C4130

2C4230

2C44103

2R171K

2C403U3/50V

2V5C1815GR

2V4

C18

15G

R

2C46203 2C

4710

0U/1

6V2C

3947

U/1

6V

2R18

1K

2R198K2

1 2 3 1XS10

12

1XS12

XT1

XTN2

PERIOD3

CLOCK4

DATA5

OT-16

OT-27

OT-38

OT-49

I/O-510

I/O-611

VDD12

AMIN13

FMIN14

GND15

IFIN216

I/O-817

I/O-718

DO119

DO220

2N2TC9257F

2C30100U/10V

2C16 203

*2TC12/7

2VD1V104

2VD3V149B

2C26

104

2C27104

2R11

3K3

2C361U/50V

2R133K3

2C354U7/50V

2C19102

2C22102

2C23102

2C21102

2R15300K

2R142K

2R9100K

2C10 471

2C15203

2C915

2R108K2

2R6 100K 2C13

203

2C4*7

2C6152

2R3 3K3

2R53K3

2C12203

2C8152

2C25104

2R4100

2R8100K

2C14203

2R7100K

2C7

152

2R1622K

2C34

220U

/10V

2C334U7/50V

2C324U7/50V

2C17682

2C18 682

2C3122U/16V

2G1 L10.7M2G2 450B

2R1 330

2C29

U1/

50V

2C330

2C233

2C130 2L

13.

5T

2R2

330

2T3

2T2

2C11103

2VD

2V

104

2V1K161GR

2TC22/7

2T1

2VD4V149B

2V39014C

2V2 9018I

RFGND1

RFIN2

AMLCUT3

MIXOUT4

VCC5

AMIF6

FMIF7

GND8

AGC9

QUOD10

ROUT11

LOUT12

LPF213

LPF114

DETIN15

DETO16

IFREQ17

ST18

OSCO19

AMOSC20

FMOSC21

AMRF22

RFVCC23

FMRF24

2N1TA2149N

2C51153

2C49153

2C48153

2C50153

2T4

2C52

203

LOOP75FM AM

RGL

+12V

G

+5V

G

DATA

CLOCK

PERIOD

ST

2V69014C2V7

9014C

2R24100

2R271K5

2R281K5

2C53 18

2T2

2R25510

2R26510

2G3

L10

.7M

2V89018H

2R29 300K

2R30 330

2R31 330

2C5422

2R32 *24

2D2 IN4148

2C5547

1 st Issue; January 2003AM/FM Stereo Receiver

AAGG--337700

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-370 FRONT PCB

INSTRUCTIONS FOR SERVICE PERSONNELBEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSEDPARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.

1234567891011121314 PC1

PC0/TM0PG0/INTVSSPB0/BZPB1/BZPB2PB3PA0PA1PA2PA3PB4PB5 PB6

PB7PA4PA5PA6PA7

OSC2/PG2OSC1/PG1

VDDRES

PC5/TM1PC4PC3PC2 15

16171819202122232425262728

8G1 4.00M

30P

30P

+5V

HT24LC02

56

+5V

100K

104104

DIN

STBCLK

DOUT

SDASCL

SPA

SPB

ST LED

PERIOD

CLOCK

DATA

SW2

SW1

TAPE

10K 10k 10k 10k 10k

+5V

1N4148

1N4148

1N4148

1N4148

1N4148

1N4148

10K

10K

8R15

56K

+5V

8R5

10K8R1

10K

+5V

4PHONO

TAPE MO~ 3

6 5

VIDEO/AUX 2

FM MODE AM

1 FM1/2

TUNER 7

CD 8

AUTO/~ MEMORY

DOWNUP

3

4

5

6

2

1-24V

+5V

+5V

1N41488C1

470U/16

8C3100U/16

8D25.1V

8C2104

8R2

10K

8C410uF/25

-24V

1

2

3

1XP7

1

2

3

1XP6

1XP14

1

2

3

4

8C10104

GND

8D3

8D4

8D5

8D6

8D7

8D8

8R4 8R3 8R18 8R198R14

8N28C9104

8C5

8C6

8R13

8C8

8C7

8D1

8R16

8R17

8N1HT48R50A-1

8N3

+5V

8R20

1.2

8R21

1.21 2 3 9 8 7 6 5 4 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 33 34 35

DGND

1.8V AC

1.8V AC

0V AC

SKEY 6

SKEY 5

SKEY 4

SKEY 3

SKEY 2

SKEY 1

KEY 1KEY 2KEY 3KEY 4

PA6PA7

VFD 25114-1

1234567891011

3332313029282726252423

12 13 14 15 16 17 18 19 20 21 22

44 43 42 41 40 39 38 37 36 35 34

PA3PA4PB7PB6

PT6312

PB5

PB4

PA3

PA2

PB3

PB2

PB1

PC1

PC2

1 st Issue; January 2003AM/FM Stereo Receiver

AAGG--337700NOTES:£Parts marked with this sign are safety critical components.They must always be replaced with identical components-refer to the appropriate parts list and ensure exact replacement.