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Kenwood GX-204KE Service Manual
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Kenwood GX-204KE Service Manual

Cd & heater control receiver
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CD & HEATER CONTROL RECEIVER
GX204KEF2/KHF2
QQ
3 7 63 1515 0
GX204LEF2/REF2
GX204SEF2
SERVICE MANUAL
SUBARU GENUINE
The knobs with numbers larger than 700 on exploded view are not
supplied for service parts because it is difficult to apply grease.
Please change to panel assy when you need repair to the knob.
The 6CD mechanism has not supplied repair parts for each part
(for Optical Laser pickup, motor etc). If you need repair to the 6CD
mechanism please change to mechanism assy (D40-2214-15).
GX204KEF2
LOAD
CD
AUX
AM
TE
FM
L 13942296513
DISP
SCAN
A/S
FRONT
GX204LEF2
PUSH ON/VOL
TONE
SCAN
A/S
www
.
AUTO
OFF
Panel assy
(Y33-2570-23): GX204KEF2
(Y33-2570-24): GX204KHF2
(Y33-2572-73): GX204REF2
PAGE
LOCAL
TUNE/TRACK
FOLDER
MODE
A/C
Panel assy (Y33-2570-12): GX204SEF2
(Y33-2572-74): GX204LEF2
BAL
DISP
PAGE
x
ao
TUNE/TRACK
y
FOLDER
i
A/C
MODE
8
PUSH ON/VOL
Q Q
3
6 7
1 3
RPT
RDM
TONE
BAL
AUTO
OFF
LOAD
CD
AM
AUX
FM
REG
LO/DX
RPT
RDM
NEWS
T.I
RDS
VOL ADJ
u163
FRONT
.
2 9
9 4
2 8
© 2006-6 CREATED IN JAPAN
B53-0427-00 ( N ) 0
Model
Model Name
GX-204KE
GX204KEF2
GX-204KH
GX204KHF2
GX-204LE
GX204LEF2
GX-204RE
GX204REF2
GX-204SE
GX204SEF2
DC cord for service
ANT extension cord for service
GX204REF2
1 5
0 5
8
2 9
9 4
RDS
VOL ADJ
NEWS
T.I
DISP
SCAN
A/S
PAGE
MODE
A/C
GX204KHF2
GX204SEF2
TONE
BAL
SCAN
LOCAL
m
A/S
co
9 9
Parts No.
86201AG290
86201AG250
86201AG460
86201AG350
86201AG550
E30-3801-15
E30-6255-05
2 8
9 9
REG
LO/DX
RPT
RDM
TONE
BAL
AUTO
OFF
RPT
RDM
DISP
PAGE

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  • Page 1 B53-0427-00 ( N ) 0 SUBARU GENUINE Model Model Name Parts No. The knobs with numbers larger than 700 on exploded view are not GX-204KE GX204KEF2 86201AG290 supplied for service parts because it is difficult to apply grease. GX-204KH GX204KHF2 86201AG250 Please change to panel assy when you need repair to the knob.

  • Page 2: Block Diagram

    GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 BLOCK DIAGRAM 3 7 63 1515 0 (X14-967) IC121 IC221 IC401 FRONT E VOL FRONT SP DIVERSITY 270mVrms 0.0dB +26.0dB FM MPX FM/AM 7BAND EQ FRONT-END POEWR FM : -0.3dB 215mVrms -3.8dB -4.5dB REAR MAIN AM : +15.6dB -30.0dB CD : +6.6dB REAR SP...
  • Page 3 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 COMPONENTS DESCRIPTION 3 7 63 1515 0 POWER SUPPLY UNIT (X00-4100-00) Ref. No. Application / Function Operation / Condition / Compatibility Power supply for illumination LED Stabilizes illumination LED voltage (8.1V) and supplies required current. Power supply for IGN5V Stabilizes IGN5V voltage (5.1V) and supplies required current.
  • Page 4 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 COMPONENTS DESCRIPTION 3 7 63 1515 0 Ref. No. Application / Function Operation / Condition / Compatibility Q141 Noise amplifier Switches constant when noise is detected. Q142 Noise amplifier Noise detection output buffer Q143 Noise amplifier Switches constant when noise is detected. Q221 Mute switch Mute within the electric volume.
  • Page 5 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 COMPONENTS DESCRIPTION 3 7 63 1515 0 Ref. No. Application / Function Operation / Condition / Compatibility Q674 Switch for D5V power supply Outputs Lo when AM. Q691 Switch for ILL power supply Detects ILL+ for ILL power supply. Q692 Switch for ILL power supply Driver for ILL power supply.
  • Page 6 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 SYSTEM MICROCOMPUTER: 703037HYGM04A (X14: IC801) Truth Value Pin No. Pin Name Application Processing Operation Description Table System µ-com → Panel µ-com data output SP_DATA_S UART 19200bps TUN_SDA F/E I2C data input/output terminal Not used Output L fixed TUN_SCL...
  • Page 7 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Truth Value Pin No. Pin Name Application Processing Operation Description Table P_STBY P-AMP standby control L: STAND-BY, H: Other P_MUTE P-AMP mute control L: MUTE, H: Other P_SVR For P-AMP discharge L: Normally, H: Discharging SRS_MODE1 SRS-WOW mode selection 1...
  • Page 8 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Truth Value Pin No. Pin Name Application Processing Operation Description Table REMOCON Vehicle satellite switch input Resistance dividing vehicle remote control Not used Not used DIAG Terminal for test mode L: Test mode, H: Normal P_DCERR_DET DC offset detection...
  • Page 9 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 e SRS mode switching SRS_MODE1 SRS_MODE2 SRS_MODE3 Mode 47pin 48pin 49pin 3D-Stereo TruBass FOCUS r REMOCON voltage table MUTE VOL+ VOL- SEEK MODE SEEK operation operation operation operation operation operation operation L 13942296513 1.18 1.40 1.65 1.95 2.21...
  • Page 10 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Pin Name Application Processing Operation Description For FLASH ROM writing Hi: FLASH writing mode, Lo: Normal mode µ-com clock oscillator 4.0MHz (ceramic oscillator) µ-com clock oscillator 4.0MHz (ceramic oscillator) VSS1 Power supply GND GND potential...
  • Page 11 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 PANEL (HEATER CONTROL) MICROCOMPUTER: MB89537A1010E (X34-405: IC1) Pin No. Pin Name Application Processing Operation Description HTR-C µ-com → System µ-com data output SH_DATA_H Communication speed: 4800bps System µ-com → HTR-C µ-com data output SH_DATA_S Communication speed: 4800bps Memory access mode setting input terminal...
  • Page 12 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Pin Name Application Processing Operation Description ENC_R2 Rotary encoder (right) pulse count input terminal ENC_R1 Rotary encoder (right) pulse count input terminal 40,41 KR3, KR2 Key scan pulse input terminal H: When writing FLASH µ-com Input terminal for FLASH writing setting 42,43...
  • Page 13 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PC BOARD 3 7 63 1515 0 (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X34-405x-xx (J74-1712-12) X34-405x-xx (J74-1712-12) TP27 TP24 R115 D18 D29 TP45 TP46 TP47 TP48 TP49 TP50 TP51 TP52 TP53 TP54 TP55 TP56 L 13942296513 R108 R102...
  • Page 14 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PC BOARD (COMPONENT SIDE VIEW) 3 7 63 1515 0 SYNTHESIZER UNIT X14-967x-xx (J74-1710-12) IC401 C412 R410 R411 R394 C392 R524 Q391 L701 D622 IC391 C702 C305 W103 Q371 D121 Q123 C123 CP371 C372 L107 Q373 R371 D501 C121 R373 Q354...
  • Page 15 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 X14-967x-xx Ref. No. Address Ref. No. Address IC121 Q333 IC141 Q351 IC143 Q352 IC171 Q353 R524 IC201 Q354 C521 IC221 Q371 C522 D601 IC222 Q372 D504 IC251 Q373 R602 R603 IC301 Q391 IC391 Q392 IC401 Q521...
  • Page 16 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 SYNTHESIZER UNIT X14-967x-xx (J74-1710-12) C409 C402 C408 C403 C407 C404 TP513 TP405 TP420 C406 C405 C557 TP552 TP404 TP403 TP417 TP556 TP422 TP555 TP554 C507 R555 C558 TP507 TP501 C559 R556...
  • Page 17 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 POWER SUPPLY UNIT X00-4100-00 (J74-1713-02) X14-967x-xx Ref. No. Address Q101 TP406 TP415 Q103 Q121 Q143 Q221 Q301 Q303 Q304 Q332 TP419 TP121 TP120 TP391 Q551 D102 D101 Q601 Q603 Q121 TP113 Q604 R125 TP111 C126 Q605...
  • Page 18 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PC BOARD (COMPONENT SIDE VIEW) 3 7 63 1515 0 SWITCH UNIT X34-401x-xx (J74-1711-12) D503 D525 D524 D515 D505 D527 D526 D516 D507 D517 D532 L 13942296513 D534 D533 D512 D506 D513 D531 D530 D514 D528 D529 D504 D502 u163 Refer to the schematic diagram for the...
  • Page 19 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 SWITCH UNIT X34-401x-xx (J74-1711-12) R586 TP552 TP553 TP554 TP577 TP590 TP589 D536 R526 TP587 TP588 X501 R590 TP578 TP569 R516 TP574 R511 TP601 TP570 R529 C505 R553 R567 R565 CP4 CP2 R564...
  • Page 20 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 AUX IN SLE BUS TP421 C403 C507 3900P C557 1000P D401 C421 C405 1000P 3900P R554 C402 100K C401 3900P C558 Q806 D501 D503 0.01 0.01 C404 C559 3900P D551 0.01 D552 D504 L701 SERVO 8V IC391...
  • Page 21 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 POWER SUPPLY (X14-967x-xx) C403 R409 C406 R407 3900P 100K 3900P 100K C405 R408 C408 R406 P 3900P 100K 3900P 100K C402 R405 C407 R403 3900P 100K 3900P 100K C404 R404 C409 R402 3900P 100K 3900P 100K...
  • Page 22 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 ∗ TEL MUTE W591 R591 7.5K R410 PON5V IC401 6.8V 3.3V 5.0V 6.8V 6.8V P-ON5V 0V or 5.0V R822 R823 ON REQ Q801 4.7K POWER TP801 0V or 5.0V R831 1K C414 C416 CDX RST R894 1K 0V or 5.0V...
  • Page 23 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 R261 R268 C125 3.3K C123 3900P 10u35 R265 C261 L121 R126 2.2K C121 0V or 5.0V 560uH 0.01 R317 80mV R255 R259 R263 NC37 NC24 3.3K 100K FFL3 C276 4.0V 4.0V R319 R312 MODE2 0V or 5.0V 10u16...
  • Page 24 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 ∗ DTC114YUA DTC343TK 2SA1576A IC121 DIVER Q121 DIVER INPUT CHANGEOVER 2SD1858 ∗ SWITCH W103 MAIN TP120 ∗ C105 C114 220P 150P ∗ TP121 C106 220P IC121 TA2083AFNG IC141 E-TDA7479AD IC143,201,222,301 NJM4565V-ZB 2SB1184 L105 IC171 HA12181FP-E IC221...
  • Page 25 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 (X34-401x-xx) 1GF-1GA 6.5V R573 R540 100K Q501 TP597 TP524 C502 C510 TP596 D501 TP503 45.0V FL+B LE 10V BU5V L 13942296513 CN501 TP998 FL DC+ TP504 FL +B (0-00,0-21) : 5.0V TP505 FL DC- (2-71) : 0V FL GND TP507...
  • Page 26 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 LEFT 4 or PRESET FOLDER SLOT RIGHT RING 1 2 3 RIGHT 1 LEFT 1 UP/DOWN CD LOAD RIGHT 4 PRESET TRACK EJECT SLOT LEFT RING 4 5 6 RIGHT 2 LEFT 2 UP/DOWN LE 10V 10.0V...
  • Page 27 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 (X34-405x-xx) FDC+ IG+5V E2PROM TP11 ∗ ∗ ∗ TP12 TP14 ∗ ∗ 5.0V POWER SUPPLY R114 820 TP16 R115 820 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗...
  • Page 28 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 ED1 (3-MT-126GINK) : GX204JHF2/KHF2,FH204SF2 FDC+ 2.9V R103 100K IG+5V ED1 (6-MT-385GINK) : GX204JEF2/KEF2/REF2,FH204DF2 L 13942296513 ED1 (6-MT-386GINK) : GX204LEF2/SEF2 X34-401- CN503 DATA S DATA H -DET (X34-405x-xx) UNIT D4,6,8,12, D5,7,9,13,17,19, D18, R18,79,84, R20,82,86, R112, MODEL NAME 16,20-22,24...
  • Page 29 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 3 7 63 1515 0 BACK VIEW (J1) FROM VEHICLE ILL+ UART+ ILL- UART- (X00-4100-00) ILLUMI LED(8.1V) TP71 TP53 8.1V R64 100 TP72 TP42 TP15 Q61,62,71-73 9.5V TP12 TP18 DC/DC 390uH 220uH (9.5V) TP21 16.0V TP62 TP40 TP46 1.5K 1.5K TP43...
  • Page 30 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 EXPLODED VIEW (for GX204KEF2/KHF2/REF2) 3 7 63 1515 0 φ2x6 M3x4 N35-3004-48 N82-2006-48 φ2.6x6 φ3x8 N86-2606-48 N09-6409-05 φ2.6x8 φ3x6 N86-2608-48 N09-6410-05 φ2.6x14 φ2.6x5 N86-2614-48 N09-6411-05 φ3x8 N80-3008-48 DME1 X34-401 X00-410 X34-405 GX204KEF2 L 13942296513 (X14-) W591 GX204KHF2 (X14-) W103 X14-967 u163...
  • Page 31 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 EXPLODED VIEW (for GX204LEF2/SEF2) 3 7 63 1515 0 φ2x6 M3x4 N35-3004-48 N82-2006-48 φ2.6x6 φ3x8 N86-2606-48 N09-6409-05 φ2.6x8 φ3x6 N86-2608-48 N09-6410-05 φ2.6x14 φ2.6x5 N86-2614-48 N09-6411-05 φ3x8 N80-3008-48 DME1 X34-401 X34-405 X00-410 L 13942296513 (X14-) W591 (X14-) W103 X14-967 u163 GX204LEF2 GX204SEF2...

  • Page 32: Parts List

    GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No.
  • Page 33 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 POWER SUPPLY UNIT (X00-4100-00) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation 1SS133 DIODE C158 CC73GCH1H060D CHIP C 6.0PF E1E2 1SS133 DIODE C159 CK73GB1H223K CHIP C 0.022UF K E1E2 HZS9L-E(B2)
  • Page 34 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SYNTHESIZER UNIT (X14-967x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation C291,292 C90-6781-05 ELECTRO 4.7UF 16WV C711 CK73GB1H122K CHIP C 1200PF C293,294 CF92JV1H683J MF C 0.068UF 50WV C721 CK73GB1H122K...
  • Page 35 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SYNTHESIZER UNIT (X14-967x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R126 RK73GB2A561J CHIP R J 1/10W M1M2 R271 RK73GB2A823J CHIP R J 1/10W R127 RK73GB2A222J CHIP R 2.2K...
  • Page 36 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SYNTHESIZER UNIT (X14-967x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R551,552 RK73EB2E100J CHIP R J 1/4W R802,803 RK73GB2A103J CHIP R J 1/10W E1 R553 RK73EB2E4R7J CHIP R J 1/4W...
  • Page 37 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SYNTHESIZER UNIT (X14-967x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R892 RK73GB2A101J CHIP R J 1/10W D802 1SS133 DIODE R893-895 RK73GB2A102J CHIP R 1.0K J 1/10W M1M2 D804,805 DAP202U...
  • Page 38 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SYNTHESIZER UNIT (X14-967x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation Q603 2SC4081 TRANSISTOR R502-505 RK73EB2E8R2J CHIP R J 1/4W Q604 2SC3392 TRANSISTOR R506 RK73FB2B561J CHIP R J 1/8W Q605...
  • Page 39 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SWITCH UNIT (X34-405x-xx) (H/C) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation D10-12 B30-1760-05 LED (1608 RED) M1E1M2 RK73GB2A103J CHIP R J 1/10W E2 B30-1760-05 LED (1608 RED) E2K1 RK73GB2A472J...
  • Page 40 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 SWITCH UNIT (X34-405x-xx) (H/C) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation 2SC4081 TRANSISTOR L 13942296513 u163 E1 : GX204REF2 E2 : GX204LEF2 (Europe) Indicates safety critical components. K1 : GX204SEF2 (North America) M1 : GX204KEF2 M2 : GX204KHF2 (Other Areas)
  • Page 41 GX204KEF2/KHF2/LEF2 GX204REF2/SEF2 PARTS LIST 3 7 63 1515 0 CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value 101 = 100pF Multiplier...
  • Page 42 MW ................9kHz Current Consumption ............10A LW ................1kHz Usable Sensitivity (S/N 20dB) MW ............... 29dBµV EMF KENWOOD follows a policy of continuous advancements LW ..............35dBµV EMF in development. For this reason specifications may be changed without notice. u163...

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