Kenwood KDC-308-GY, KDC-308-AY, KDC-308-A, KDC-2027-SGY, KDC-2027-SG Service Manual

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CD RECEIVER

KDC-2027SA/SAY/SG/SGY KDC-3027A/AY/G/GY KDC-308A/AY/G/GY KDC-4027/V/VY/Y KDC-F327A/G

SERVICE MANUAL

Panel assy KDC-2027SA/SAY/SG/SGY (A64-3168-02)

OFF

AUD

AUTO

AME

Panel assy KDC-3027A//AY/G/GY (A64-3166-02) KDC-308A/AY/G/GY (A64-3167-02) KDC-F327A/G (A64-3169-02)

OFF

AUD

VOL

AUTO

CD mechanism extension cord (22PIN) : W05-0618-00

Front glass

KDC-2027SA/SAY/SG/SGY (B10-4462-01)

MONO

SCAN

RDM REP

Front glass KDC-3027A/AY/G/GY (B10-4460-01)

KDC-308A/AY/G/GY (B10-4461-01) KDC-F327A/G (B10-4463-01)

SCAN

RDM REP

CLK ADJ

PTY

CLK MENU

DC cord (E30-6132-05) (E30-6286-05)

Plastic cabinet assy (A02-1486-13)

Panel assy KDC-4027/V/VY/Y (A64-3165-02)

AUD

VOL

AUTO

Mounting hardware assy (J21-9716-03)

OFF

Front glass KDC-4027/V/VY/Y (B10-4459-01)

PTY

M.RDM

CLK MENU

EXTERNAL MEDIA CONTROL

SCAN

SCRL

Antenna adaptor (T90-0523-05)

RDM REP

Lever (D10-4589-04) x 2

TDF PANEL INFORMATION

MODEL PARTS NO. PANEL NAME KDC-2027SA/SAY Y33-1960-64 TDF-2027SA KDC-2027SG/SGY Y33-1960-65 TDF-2027SG KDC-3027A/AY/G/GY Y33-1960-62 TDF-3027 KDC-308A/AY/G/GY Y33-1960-63 TDF-308 KDC-4027/Y Y33-1960-60 TDF-4027 KDC-4027V/VY Y33-1960-61 TDF-4027V KDC-F327A/G Y33-1960-66 TDF-F327

Escutcheon (B07-3001-02)

S1(LOS SW)

S2(12EJE SW)

(LOE & LIM SW)

S4(8EJE SW)

LPF LPF

IC1

MECHANISM CONTROL IC

5V SW

3.3V AVR

IC2

IC3

DSP/DAC IC

CD RF/SERVO/

APC

IC4

4ch BTL DRIVER

LD PD

TR COIL FO COIL

DM1

DM2

SPINDLE MOTOR

LOADING MOTOR

& SLED

OPTICAL PICKUP

DPU1 :

BU5V 15

DGND 14

DATA

CLK

MUTER

MUTEL 12

MSTOP

MRST 11

LOS SW 20

8EJE SW 17

A8V 9

Lch 8

AGND 7

DOUT

Rch

4MOTOR

LO/EJ 5

SGND

S7.5V 3

NC 16

12EJE SW

MSTOP

DATA

MRST

MUTEL

MUTER

CLK

PON

SERCH

LOE&LIM

LOE & LIM SW

PON

INTQ

DSP RESET

STB

SCK

DRV MUTE

CNTL

RST

SCK

STB

INTQ SO

MD+

SD+

TD+

FD+

LZM

RZM

ROUT

LOUT

4.19MHz

Z MUTE L

Z MUTE R

16.934MHz

A B C D E

PRE OUT

FDIN-

BIAS

CNT

TR+

TRFO-

FO+

SLD+

SLD-

SPD-

SPD+

TDIN-

SPIN-

SLIN+

MUTE

LO/EJ

OPEN

BU5V

SW5V

SW3.3V

S7.5V

VREF

CD PLAYER UNIT (X32-5490-00)

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY

KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

BLOCK DIAGRAM

1200mV

CD : 3600mV CH : 3600mVAM(E) : 855mV

FM(E) : 1372mV

FM(J,K) : 1800mV AM(J,K) : 600mV

CHANGER

KEY MATRIX

WITH

LCD DRIVER

LCD

REMOCON

MI-COM

ANT

AM AGC

FM AGC

DECODER

RDS

RESET IC

EEP-ROM

TUNER,MPX & E-VOL.

SUPPLY IC

SW5V

SERVO

P-ANT

P-CON

POWER

MUTE LOGIC

DET

ACC

BU DET

MUTE

PRE

POWER IC

ACC

BACK

OUT

PRE

IC1

DATA H

MUTE

DATA C

REQ H

CH-CON

AUDIO OUT

CLK

REQ C

RST

BACK UP

BU5V

IC2

SW5V

LO/S

RST

LOE/LIM

LO/EJ

STOP

MUTE

8EJE

SDA

SCLK

AUDIO OUT

12EJE

Q501

Q502

AM+B

FM+B

AM AGC OUT

IC6

CH CD

SERVO BU5V

A8V

TUNER OUT

BU5V

IC11

IC12

IC10

FM AGC OUT

A8V

SW2

SW1

ILLUMI

VCC

BU5V

AUDIO+B

AM+B

FM+B

BACK LIGHT

KEY ILLUMI

Q51,55

SW5V

Q50

SERVO

BU5V FM+B

AM+B

A8V

P-CON

P-ANT

IC8

Q20

Q10

IC7

MUTE

Q223,224

IC4

ELECTRIC UNIT (X34- )

SWITCH UNIT (X16- )

BLOCK DIAGRAM

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY

KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

COMPONENTS DESCRIPTION

● SWITCH UNIT (X16-2462-7x/2472-7x)

Ref No. Application/Functions Operation/Condition/Compatibility

IC1 LCD driver LCD derive & Key input interface IC2 Sensor Remote control sensor Q1 Key scan detect key scan start at base gose “L”. Q2 LED SW When Q2 base gose “H” LED is light on RED Color Q3 LED SW When Q2 base gose “H” LED is light on GREEN Color

● CD PLAYER UNIT (X32-5490-00)

Ref No. Application/Functions Operation/Condition/Compatibility

IC1 Mechanism control When BU5V & MSTOP (12pin) goes “H” (IC1 is active) IC2 SW3.3V AVR When CNTL (1pin) goes “H” (SW3.3V AVR : ON) IC3 CD DSP & servo IC CD RF amp, Servo, DSP & DAC IC4 BTL driver Focus, tracking coil, Sled & Spindle motor driver IC Q2 SW SW5V SW transistor Q3 APC Auto P ower Control Q4 SW EQ SW transistor

● ELECTRIC UNIT (X34-3102-7x)

Ref No. Application/Functions Operation/Condition/Compatibility

IC1 System control IC System control microprocessor IC4 Audio power IC Audio power amplifier IC6 RDS decoder RDS decoder IC IC7 Power supply IC Multi AVR IC (for 5V, 8V, P-CON & P-ANT) IC8 Muting logic IC Control for MUTE, P-ANT & RESET muting IC10 E-VOL & tuner IC E-VOL. FM/AM tuner & stereo decoder IC11 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L” IC12 E2PROM Memorized tuner adjustment data (save & load) Q10 BU detector When the base goes “H” during BU applied (ON) Q20 ACC detector When the base goes “H” during ACC applied (ON) Q40 Muting driver foe Q223, 224 When the base goes “L” (Muting : ON) Q50 SW5V When the base goes “L” (SW5V : ON) Q51 SW Control SW for IC7 Q55 SERVO +B AVR Servo AVR (7.4V) Q70 Serge detector When the base goes “H” (Serge detection) Q101 DSI illumination SW When the base goes “L” (DSI illumination : ON) Q102 Panel 5V SW When the base goes “L” (Panel 5V : ON) Q201 Noise buffer Tuner audio noise buffer amplifier Q223,224 Preout muting SW When the base goes “H” (Preout muting : ON) Q251 SW When the base goes “L” (IC4 : ON) Q252 Smeter RC & MPTHTC SW RC & TC is “LONG” when the base is “H” (base is “L” is AF search) Q253 Smeter RC & MPTHTC SW When collector is “H”, emitter is “H” Q501 AM RF amplifier When the base goes “H” (RF circuit gain is up) Q502 FM RF amplifier When the base goes “H” (RF circuit gain is up) Q503 MPX buffer MPX input buffer with RDS

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY

KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER : UPD780058GC55x (X34 : IC1)

Pin No. Name I/O Description Processing Operation

1PANEL I Panel detection H : Panel detached, L : Panel attached

2 8EJE SW I

3NCONot used (out put L) 4Avss

5 L-RST O LCD driver RESET Normal H, Power off L

6 L-CE O LCD driver selection

7AVREF1 8NC Not used (connected to 9pin) 9 IC10-DATA I/O IC10, E2PROM data communication Non communication : H

10 IC10-CLK O IC10, E2PROM clock communication Non communication : H

11 L-DATAL I Data input from the LCD driver When panel detached : L

12 L-DATAS O Data output to the LCD driver When panel detached, output L 13 L-CLK O Clock output to the LCD driver When panel detached, output L 14 R-DATA I Data input from the RDS Except RDS model : Output L 15 R-QUAL I Quality input from the RDS Except RDS model : Output L 16 CH-DATAC I Data input from the changer (new 5L) Except changer model : Output L

17 CH-DATAH O Data output to the changer (new 5L)

18 CH-CLK I/O Clock input/output with the Changer (new 5L)

19 CH-REQH O Request output to the changer (new 5L)

20 NC O Not used (output L)

21 AFS O Noise detection time constant switching terminal

22~24 NC O Not used (output L)

25 CH-CONT O Changer control

26 TYPE REF O 5V lines output for destination setting H : During destination reading 27 SD I Tuner SD input H : Station detected 28 NC O Not used (output L) 29 TYPE2 I Destination type selection terminal 2 Refer to destination type list. 30 TYPE1 I Destination type selection terminal 1 Refer to destination type list.

H : Eject is completed Except 8cm CD model : Always output L

H : Panel detached, L : RESET

When 7seg model, output L H : Select (panel communication) When panel attached, output L

Non communication : H

Pull down on X34 unit, Pull up on X16 unit

When non communication, last data keeping Except changer model : Output L Check the old and new Except changer model : Output L L : Requset Except changer model : Output L

H : Normal, L : FM/AM seek and AF search (When tuner SRC auto zero, L)

H : Changer on, L : Changer off Except changer model : Output L

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Name I/O Description Processing Operation

31 TYPE0 I Destination type selection terminal 0 Refer to destination type list. 32 TUNER-TYPE1 I Destination available/genuine model rool off H : Genuine model 1, L : Available model 33 Vss1 34 TUNER-TYPE0 I Destination available/genuine model noise cancel H : Genuine model 0, L : Available model

35 MUTE O Mute (E.Vol, Preset) control

36 M-DATA I/O Data input/output with the CD mechanism Non communication : H 37 M-CLK O Clock output to the CD mechanism Non communication : H

38 ADJ O Tuner lines adjustment PS1-0, 1=L PS1-2, 2-0, 1=Hi-z

39 P-MUTE O Power IC mute control

40 SVR O Power IC servo control

41 P-STBY O Power IC standby control H : Power IC ON, L : Power IC OFF

42 SW5V O SW 5V control

43 B.U-DET I Back up detection terminal H : Power down, L : B.U. on 44 ACC-DET I ACC detection terminal H : ACC OFF, L : ACC ON

H : Mute on, L : Mute off Power off after that 15 second L

When adjustment = H

IC10-DATA, CLK=Hi-z H : Mute off, L : Mute on Power off after that 15 second H H : When momentary power down detected L : Nomal

H : SW5V OFF, L : SW5V ON Power off after that 10 second H

45 PS1-0 O

46 PS1-1 O

47 PS1-2 O Power supply IC SW1 control 2 P-ANT

48 PS2-0 O

49 PS2-1 O

50 BEEP BEEP

51 DSI O DSI control

52 NC O Not used (out put L) 53 NC O Not used (out put L)

Power supply IC SW1 control 0 Audio 8V, P-CON

Power supply IC SW1 control 1 Audio 8V, P-CON

Power supply IC SW2 control 0 ILLUMI, FM, AM

Power supply IC SW2 control 1 ILLUMI, FM, AM

BA4911 SW1 Power supply IC output

PS1-2 PS1-1 PS1-0 A8V P-CON P-ANT

LLLSTANDBY LL (H) H (L) ON OFF OFF LHHONONOFF

HHHONONON

BA4911 SW2 Power supply IC output

PS2-1 PS2-0 ILLUMI FM AM

LL STANDBY

L (H) H (L) ON ON OFF

HHONOFF ON

H : Light on, L : Light off When panel attached, output L When panel detached, flashing at the panel (H/L) FIX model is output L

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY

KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Name I/O Description Processing Operation

54 LOE/LIM SW I CD mechanism down&limit detection H : Chucking detection, L : Normal 55 MO SW O CD mechanism loading motor control output H : Loading, Eject, Break, L : Play 56 LO/EJ I/O CD mechanism loading/Eject switching terminal H : Eject, L : Loading 57 M-STOP O Stop output to the CD mechanism H : Play, L : Stop 58 M-RST O Reset output to the CD mechanism H : Normal, L : CD mechanism reset 59 M-MUTE I Mute input from the CD mechanism H : Mute off, L : Mute on 60 RESET Reset input from the System microcomputer 61 REMO I Remote control input 62 R-CLK I RDS clock input Except RDS model : Output L

H : Changer detection

63 CH-REQC I Request input from the changer (new 5L) L : Request

Except Changer model : Output L

64 LOS SW I CD mechanism loading's switch detected

65 KEY-REQ I

66 12EJE SW I 12cm disc detected L : 12cm disc 67 Vss0 68 VDD1 69 X2 MAIN X’tal oscillating circuit 4.19MHz X’tal connection 70 X1 MAIN X’tal oscillating circuit 4.19MHz X’tal connection 71 IC TEST 72 XT2 Not used OPEN 73 XT1 74 VDD0 VDD Connected to VDD

75 AVREF0

76 S-METER I S-meter input 77 NOISE I FM noise detection input

78 PHONE I 2 way mute 1.0V or less : TEL MUTE

79 NC O Not used (out put L)

80 AVCONT O A/D converter standard voltage control output

Key input detected H : Key no input (11pin L connected to the DATA L) L : Key input (edge key data reading start)

A/D converter reference voltage control output, connection to the 80pin AVCONT

H : No disc L : Disk in (Loading Start)

2.5V or greater : NAVI MUTE

Except phone mute model : Output L

H : During A/D converter active same timing with PON

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

MICROCOMPUTER’S TERMINAL DESCRIPTION

● CD MECHANISM CONTROL IC : 789166YGB-A513 (X32 : IC1)

Pin No. Name I/O Description Processing Operation

1~6 NC I NC GND

7 ZMUTE_L I 0 bit MUTE detect (Lch)

8 ZMUTE_R I 0 bit MUTE detect (Rch)

9AVss - DGND 10 /MUTE_L O Lch Audio mute control L : MUTE ON, H : MUTE OFF 11 /MUTE_R O Rch Audio mute control L : MUTE ON, H : MUTE OFF 12 /MSTOP I Interruption for stand-by L : STOP, H : Release for STOP mode 13 INTQ I Interruption for DSP IC H : Interruption 14 /FOGUP I Interruption for focus gain up L : Fo GAIN UP, H : NORMAL 15 PON O Power ON/OFF control H : ON, L : OFF 16 /SCK O (for DSP) serial data clock output 17 Vdd1 - BU5V 18 SO O (for DSP) serial data output 19 SI I (for DSP) serial data input 20 /CLK I/O (for system control) I2C clock 21 DATA I/O (for system control) I2C data 22 Vpp - (FLASH saving terminal) 23 XT2 - NC OPEN 24 XT1 I NC GND 25 /MRESET I Reset detect L : RESET, H : NORMAL 26 X2 - System clock 4.19MHz 27 X1 I System clock 4.19MHz 28 Vss0 - DGND 29 Vdd0 - BU5V 30 LOE&LIM_SW I Loading end & limit SW detect L : Inside detect, H : Outside 31 DRV_MUTE O Driver muting L : MUTE ON, H : MUTE OFF

32,33 NC O NC OPEN

34 /SERCH O Condition of serch state L : Search, H : NORMAL 35 /STB O Data strobe signal output 36 A0 O Command & parameter signal output 37 Vss1 - DGND 38 /DSP_RESET O DSP reset control L : RESET, H : NORMAL

39~41 NC O NC OPEN

42 /PON O Pow er ON/OFF control L : ON, H : OFF 43 Avdd - BU5V 44 Avref - BU5V

Less than 54h : NORMAL, More than 54h : ZMUTE detect Less than 54h : NORMAL, More than 54h : ZMUTE detect

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY

KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

TEST MODE

1. How to enter test mode

While holding the FM key and preset 6 ke y and reset the unit. All display segments light up when the test mode is entered.

2. How to exit from test mode

Reset the unit. Turning ACC off, power off, momentary power down or panel detaching does not terminate the test mode.

3. Test mode specifications of CD receiver

• Pressing the Track Up key skip to tracks in the following se-

quence: No.9 → No.15 → No.10 → No.11 → No.12 → No.13 → No.14 → No.9 (repeats the cycle)

• Pressing the Track Down key skip to the track immediately

before the track being played.

• Pressing Preset 1 key skip to track No. 28.

•Forced ejection is not provided.

4. Audio functions

• Pressing the AUDIO key or the “*” key on the remote con-

troller initiates the Audio adjustment mode.

• In the Audio adjustment mode, the Seek Up/Down keys on

the remote controller can only be pressed shortly. (They cannot be held depressed.)

• The volume is -10dB (which is displayed as “30”).

• LOUDNESS is OFF.

• The Bass/Treble Up/Down and Balance/Fader Up/Down

buttons function as full-boost/full-cut and full-front/full-rear respectively.

5. Menu mode (for 14segment model)

• Pressing the CLK or the DNPP k ey on the remote controller

initiates the Menu mode.

• In the Menu mode, the Seek Up/Down keys on the remote

controller can only be pressed shortly. (They cannot be held depressed.)

• With the models incorporating RDS, the first oper ation in the

menu becomes local seek.

6. Version and operating hours display

• The following table shows the key operations and resulting

display information.

Key Operation Display Pressing Preset 1 Version (Date and time display) Pressing Preset 2 All display segments light up Pressing Preset 3 CD operating hours Pressing Preset 4 E2PROM (Adjustment data for IC10) Pressing Preset 5 CD ejection count Pressing Preset 6 Number of times adjustment for IC10

• Holding Preset 3 while the oper ating hour inf ormation is displayed clears it.

• Holding Preset 5 while the ejection count information is displayed clears it.

Adjustment Mode

• Adjustable items

1 : Stereo Decoder Sub address : 9 2 : Configuration Sub address : D 3 : Stereo decoder Adjustment Sub address : E 4 : Hi-Cut Sub address : C 5 : Field strength control Sub address : B

• Default values If they are not written in the EEPROM, the default values specified are set in IC10.

Adjustment procedure

1. Enter the IC10 Adjustment mode by resetting the unit while holding preset 3 key + preset 6 key.

2. Select the TUNER source by pressing SRC.

3. When the adjustment mode is entered, the display shows 2-digit hex number.

4. When preset 1~5 is recalled, the setting values corresponding to the pressed number are displayed. (The displayed values are those in the RAM.)

5. Vary each setting value using

6. Store the values in the corresponding preset number.

7. The settings can be performed individually for each item. (It is not required to store all the values together.)

8. After storing the values, reset the unit to exit from the adjustment mode. The v alues set in the EEPROM will be read during the resetting.

9. When the band is switched, there may be cases in which the preset number being displayed does not coincide with the stored setting value. To check this, be sure to recall the preset number after you switch the band.

and key.

Notes

1. The items that are not stored will be set to the default values.

2. Once a value is stored in memory, the value will always be used later. (It is not allowed to modify the setting values by switching the destination type.)

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

ADJUSTMENT

IC10 (TDA7513T) -The T uner adjustment method

• When IC10 and its circumference are fixed, according to the following order, it readjusts if needed.

• The adjustment item changes with parts to exchange. Please refer to "Parts vs Adjustment item table".

1-1.

VCO Coil Adjustment - Adjustment of T unning Voltage

Voltage Check Point : Vt-Check Land

(PWB Side B, around D506) Adjustment Coil : L507 (VCO Coil) The adjustment method : VCO coil is turned and adjusted

according to the following tables .

TYPE Mode freq. Voltage Fig

E/M AM 1611kHz 5.5 ± 0.1(V) (C)

KAM1700kHz 5.8 ± 0.1(V) (C) JFM90.0MHz 5.6 ± 0.1(V) (C)

M : AM Adjustment For Your Information :The frequency of SET is only set up

by Pre-Set-Ke y in case this adjustment

1-2. Adjustment of 1st & 2nd-MIX Coil

Voltage Check Point :S-METER-Check Land

(PWB Side B, around W572) Adjustment Coil :1 Setting of Signal Generator : Refer to the following tables

TYPE MODE freq. Mod. ANT Input Fig

KAM1000kHz OFF 35dBuEMF (B),(C)

E,M,J AM 999kHz OFF 35dBuEMF (B),(C)

qThe appearance and the coil with which S-METER DC

voltage serves as the maximum are turned and adjusted in the above-mentioned SG input.

wBy the above-mentioned adjustment method, same ad-

justment is performed to both sides (1st & 2nd MIX Coil).

(

REAR VIEW

st IFT = L508 / 2nd IFT = L509

)

1-3. Adjustment of FM_ANT&RF Coil

Voltage Check Point : S-METER-Check Land

Adjustment Coil : ANT Coil = L505

Setting of Signal Generator : Refer to the following tables.

TYPE MODE freq. Mod. ANT Input Fig

E/M FM 87.5MHz OFF 5 or 11dBuEMF (A),(C)

KFM87.9MHz OFF 5 or 11dBuEMF (A),(C)

JFM76.0MHz OFF 5 or 11dBuEMF (A),(C)

qThe appearance and the coil with which S-METER DC

voltage serves as the maximum are turned and adjusted in the above-mentioned SG input.

wBy the above-mentioned adjustment method, same ad-

justment is performed to both sides (ANT & RF Coil).

1-4.

Adjustment of STEREO (adjustment of 456k-VCO)

Adjust in TEST MODE

•How to enter the test mode While pressing on [FM] and [PRESET 6] keys, reset the unit.

• Adjustment method Complete on condition that show “ALL OFF” when pressing on [PRESET 1] and [PRESET 6] keys. (Writing adjustment valve to the EEPROM.) Effect of adjustment is in cofirmation of adjustment status at [PRESET 4] key.

• Display of [PRESET 4] Adjustment “OK” : 14seg model “E2P OK” 7seg model “EPO” Adjustment “NG” : 14seg model “E2P ERR” 7seg model “EPE”

• Releasing the test mode Reset mode only. ACC off, Power off, Power down and Remove the panel mode is not releasing.

(PWB Side B, around W572)

RF Coil = L506

L506

L508

L505

L509

L507

[Fig.1]

(

OVER VIEW

[Fig.2]

(

TUNER ANT

)

(A)

FM-SG

(B)

AM-SG

(C)

DC Voltmeter

S-METER Check Land

(

UNDER VIEW

[Fig.3]

Vt Check Land

)

IC10

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY

KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

ADJUSTMENT

2. IC10 (TDA7513T) Replacement - Parts vs Adjustment Item Table

• When the parts in the following tables are exchanged, please readjust according to a table.

• When other parts are exchanged, please perform only a check of operation. There is no necessity for readjustment.

Replacement parts Adjustment Item

Parts Name

EEP-ROM M24C01-WMN6T

Antenna Coil

RF Coil

VCO Coil

1st MIX Coil L508 ALL L30-0770-05 K 2nd MIX Coil L509 ALL L30-0771-05 K Variable Capacitance Diodes D504 ALL KV1720S K KKKK Variable Capacitance Diodes D505 ALL KV1720S K KKKK Variable Capacitance Diodes D506 ALL KV1720S K KKKK X'tal X501 ALL L77-2077-05

Ref Number

IC10 ALL TDA7513T KKKKKK

IC12 ALL BR24C01AF-W KKKKKK

L505

L506

L507

TYPE Parts Number VCOVt 1st MIX 2nd MIX ANT Coil RF Coil Stereo

S-24CS02AFJ-TB

J L31-0966-05

E,K,M L31-0967-05

J L31-0969-05

E,K,M L31-0970-05

J L32-0932-05

E,K,M L32-0936-05

K KKKK

• The “ K ” mark shows that the adjustment is need.

A B C D E

W24

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

PC BOARD (FOIL SIDE VIEW)

ELECTRIC UNIT X34-3102-7x (J74-1465-22)

W137

W81

CP3

C104

C50

C52

W124

C54

CP1

C102

R106

C58

C57

R122

60 61

C105

W120

R143

CP2

R131

R123

16 15

D14

R72

R68

W138

R28

R71

R69

W117

WH2

W119

C53

C55

W103

R25

W114

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