Kenwood GX-204KE User manual

© 2006-6 CREATED IN JAPAN
B53-0427-00 (N)0
CD & HEATER CONTROL RECEIVER
GX204KEF2/KHF2
GX204LEF2/REF2
GX204SEF2
SERVICE MANUAL
GX204LEF2
FOLDER
AUTO
OFF
TONE BAL
SCAN DISP
A/S PAGE
RPT RDM
NEWS T.I
RDS VOL ADJ
REG LO/DX
CD
FM
AUXAM
MODE A/C
LOAD
TUNE/TRACK
PUSH ON/VOL
FRONT
GX204KEF2
CD
AUX
LOAD
MODE A/C
TONE BAL
TUNE/TRACK
FOLDER
AUTO
OFF
DISP PAGE
SCAN LOCAL
A/S
FM
AM
RPT RDM
PUSH ON/VOL
FRONT
TONE BALSCAN
A/S
RPT RDM
NEWS T.I
DISP
PAGE
RDS VOL ADJ REG LO/DX
GX204REF2
MODE A/C
AUTO
OFF
GX204KHF2
TONE BAL
SCAN
A/S
RPT RDM
LOCAL DISP PAGE
GX204SEF2
SUBARU GENUINE Model Model Name Parts No.
GX-204KE GX204KEF2 86201AG290
GX-204KH GX204KHF2 86201AG250
GX-204LE GX204LEF2 86201AG460
GX-204RE GX204REF2 86201AG350
GX-204SE GX204SEF2 86201AG550
DC cord for service E30-3801-15
ANT extension cord for service E30-6255-05
Panel assy
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).
(Y33-2570-23): GX204KEF2
(Y33-2570-24): GX204KHF2
(Y33-2572-73): GX204REF2
Panel assy (Y33-2570-12): GX204SEF2
(Y33-2572-74): GX204LEF2
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

2
GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
BLOCK DIAGRAM
ANT
SUB
MAIN
ANT
AUX
EXT
UNIT
DIVERSITY
FRONT-END
FM/AM N/C LPF 7BAND EQ
E VOL
FM MPX
BAL
FAD
ATT
ATT
MIX LOGIC
MUTE RESET
RDS
MUTE
WOW
SRS-
4ch
POEWR
AMP
DET
BU
DET
ACC
CONT
ANT
DET
ILL-
DET
ILL+
MD
MECHA
ISO
ISO+LPF
MECHA
6CD
ISO
REAR SP
TEL
MUTE
BU
ACC
P ANT
ILL-
ILL+
LED
AVR
AVR
DC/DC
Q692
SATELLITE
SYSTEM
u-COM
IC121 A1
IC141
IC221
IC751 IC802
IC251
IC401
Q721
Q711
Q352
Q806
Q805
Q602
IC551
IC201
IC222
IC801
LED VFD KEY
u-COM
PANEL
HTR-C
u-COM
LED VFD
IC501
IC1
RESET
IC2
KEY ACC
DET
Q7
LED
AVR
Q31
DET
ILL-
Q5
DC/DC
(UP)
Q73
(DOWN)
DC/DC
Q51
IGN
AVR
Q41
ILL+
ILL-
IGN
ACC
UART
USED
(2-71) (2-72)
USED
(0-00) (0-21)
USED
(0-00)
FRONT SP
(2-71)
USED
(2-72)
-3.8dB -4.5dB
NAVI : -20.0dB
AUX : +2.6dB
EXT CH :+2.6dB
MD : +6.6dB
CD : +6.6dB
AM : +15.6dB
FM : -0.3dB
0.0dB
-30.0dB
-12.7dB
-20.0dB
270mVrms
FM
215mVrms
AM
FRONT
REAR
(VOL. MAX)
BEEP
MUTE
SRS-MUTE
P-MUTE
STANDBY
DIAGNOSTIC
BU DET
RESET
0.8Vrms
AUX 1.4Vrms(MAX)
0.0dB
0.8Vrms
EXT CH 1.3Vrms
NAVI 1.2Vrms
0.0dB
+26.0dB
+26.0dB
(X14-967)
(X34-401)
(X34-405)
(X00-410)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

3
GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
COMPONENTS DESCRIPTION
●POWER SUPPLY UNIT (X00-4100-00)
Ref. No. Application / Function Operation / Condition / Compatibility
Q31 Power supply for illumination LED Stabilizes illumination LED voltage (8.1V) and supplies required current.
Q41 Power supply for IGN5V Stabilizes IGN5V voltage (5.1V) and supplies required current.
Q51 Step-down DC/DC switching Converts voltage by switching.
Q53 Power supply for VFD filament Stabilizes VFD filament voltage (2.9V) and supplies required current.
Q54 Power supply for VFD filament Configures Darlington with Q53.
Q55 Power supply SW for VFD filament ON/OFF filament power supply by µ-com FL_FIL_ON signal.(ON with µ-com L output)
Q61 Power supply for DC/DC converter Stabilizes DC/DC input voltage (9.5V) and supplies required current.
Q62 Power supply for DC/DC converter Configures Darlington with Q61.
Q71 Step-up DC/DC timing control Controls step-up DC/DC switching.
Q72 Step-up DC/DC switching Converts voltage by switching.
Q73 Step-up DC/DC output voltage switching Detects output voltage and controls switching timing.
●SYNTHESIZER UNIT (X14-967x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC121 FM diver IC FM diver
IC141 RDS demodulation IC Demodulates RDS
IC143 Amplifier for filters RDS noise amplifier
IC171 AM noise canceller IC AM noise canceller
IC201 Amplifier for isolation 6CD isolation
IC221 Audio control IC BASS/MID/TRE, MPX, mute, electric volume
IC251 Audio control IC WOW control
IC301 Amplifier for midpoint potential output Outputs midpoint potential (6.8V, 4V).
IC391 Servo 8V power supply Servo 8V power supply driver
IC401 Power amplifier IC Power amplifier with 4CH
IC521 I2C bus IC Sie-BUS communication
IC551 Isolation IC AUX isolation
IC651 D3.3V power supply Power supply driver for 6CD mechanism Bu3.3V.
IC671 D5V power supply Power supply driver for 6CD/MD mechanism DSP5V.
IC681 C3.3V power supply Power supply driver for 6CD mechanism DSP3.3V.
IC751 Mute logic IC For hardware mute.
IC801 System µ-com System control
IC802 Reset IC Detects system reset.
IC952 Level shift IC Level-shifting (3.3V →5V)
Q101 IF count detection Outputs Lo when IF count is detected.
Q102 AM power supply switch Outputs 8V when AM.
Q103 RDS data buffer Outputs RDS buffer
Q121 Diver switch Detects diver ON/OFF.
Q122 FM S meter switch Outputs S meter voltage when FM.
Q123 Diver IC power supply switch Outputs Hi when AM_OFF.
Q124 Diver IC power supply switch Outputs Lo when AM.
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

4
GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
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.
Q222 Switch within the electric volume For switching FM/AM within the electric volume.
Q223,224 Mute switch SRS-WOW mute
Q301 Midpoint circuit discharge switch Discharges the midpoint voltage when ACC_OFF.
Q303 Midpoint circuit discharge switch Detects P-ON for discharging midpoint voltage when ACC_OFF.
Q304 Midpoint circuit discharge switch Discharges the midpoint voltage when ACC_OFF.
Q331 Servo 8V power supply switch Detects P-ON for servo 8V.
Q332 Servo 8V power supply switch Driver for servo 8V.
Q333 Servo 8V power supply switch Darlington for servo 8V.
Q351 Power supply switch for P-ANT Detects Acc for P-ANT.
Q352 Power supply switch for P-ANT Driver for P-ANT.
Q353 Power supply switch for P-ANT Darlington for P-ANT.
Q354 P-ANT short detection switch Detects P-ANT short.
Q371~373 DC offset detection switch Detects DC offset voltage.
Q391 Audio8V power supply switch Detects P-ON for Audio8V.
Q392 Audio8V power supply switch Driver for Audio8V.
Q521 Current buffer for SYS_ON Outputs Hi when SYS_ON is Lo.
Q522 Current buffer for SYS_OFF Outputs Hi when SYS_OFF is Lo.
Q523 Bus_OFF detection Inputs Hi when Sie-Bus system is OFF.
Q524 Bus_ON detection Inputs Hi when Sie-Bus system is ON.
Q525 Hardware reset switch Outputs Lo when hardware reset is detected.
Q526 Sie-Bus reset detection switch Outputs Hi when Sie-Bus reset is detected.
Q551 AUX detection switch Outputs Hi when AUX is detected.
Q601 Power supply switch for DC/DC45V Detects DC/DC switch.
Q602 Power supply switch for DC/DC45V Driver for DC/DC45V power supply.
Q603 Power supply switch for DC/DC45V Darlington for DC/DC45V power supply.
Q604~606 Switching for DC/DC45V power supply For DC/DC45V power supply.
Q621 Switch for filament power supply Detects DC/DC switch.
Q622 Switch for filament power supply Driver for filament power supply.
Q623 Switch for filament power supply Darlington for filament power supply.
Q624 Power supply switch for DC/DC45V Detects DC/DC switch.
Q625 Power supply switch for DC/DC45V Driver for DC/DC45V power supply.
Q626 Switch for filament power supply Driver for filament power supply.
Q651 Switch for Bu5V power supply Driver for Bu5V power supply.
Q652 Switch for Bu5V power supply Darlington for Bu5V power supply.
Q671 Switch for D5V power supply Detects P-ON for D5V power supply.
Q672 Switch for D5V power supply Outputs Lo when AM.
Q673 Switch for D5V power supply Supplies D5V power supply when AM.
COMPONENTS DESCRIPTION
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299

5
GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
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.
Q693 Switch for ILL power supply Darlington for ILL power supply.
Q694 Switch for ILL power supply Driver for ILL power supply.
Q711 Acc detection switch Outputs Lo when Acc_ON.
Q721 Bu detection switch Outputs Lo when Bu_ON.
Q722 Over-voltage detection switch Detects Bu over-voltage.
Q801 P-ON5V power supply switch Driver for P-ON5V power supply.
Q802 Sie-BUS mute output Outputs Hi when mute ON.
Q803 Switch for ILL- level shift Converts ILL- (13.2V →5V).
Q804 ILL+ detection switch Detects ILL+.
Q805 Switch for ILL- level shift Converts ILL- (13.2V →5V).
Q806 ILL- detection switch Detects ILL-.
Q807 Switch for SRS-WOW mute Outputs Hi when mute ON.
Q808 Switch for level-shift Level-shifting (5V →3.3V)
Q809 Switch for 6CD mute Outputs Lo when mute is requested from 6CD mechanism.
Q810 Switch for level-shift Level-shifting (5V →3.3V)
●SWITCH UNIT (X34-401x-xx) (AUDIO)
Ref. No. Application / Function Operation / Condition / Compatibility
IC501 Audio panel µ-com Fluorescent indicator tube, Key matrix control
Q501 For cut-off bias setting PNP transistor When displaying with fluorescent indicator tube, filament (-) terminal is approximately 3.0V.
Q502 For fluorescent indicator tube Base voltage L: ON, H: OFF
power switch PNP transistor
●SWITCH UNIT (X34-405x-xx) (H/C)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 Heater control panel µ-com Vehicle ECU, communication with audio-side µ-com, key import,
display data transmission, illumination control
IC2 Reset IC When µ-com power supply voltage is 4.2V or less, reset the µ-com.
IC3 E2PROM Stores ROM correction data
Q1 UART+ Interface for UART communication (transmission) with vehicle.
Q2 UART- Interface for UART communication (reception) with vehicle.
Q3 Power switch ON/OFFVH voltage application ofVFD.
Q4 Power switch ON/OFF Q3 by taking IGN_DET and DD_ON logic.
Q5 ILL- signal detection Transmit ILL- signal from vehicle to µ-com and Q13.
Q7 ACC voltage detection Detects ACC voltage from the vehicle.
Q11 Illumination LED control switch Controls ON/OFF and the luminance of LED for front DEF.
Q12 Illumination LED control switch Controls ON/OFF and the luminance of LED for rear DEF.
Q13 Illumination LED control switch Controls ON/OFF and the luminance of LED for key illumination.
COMPONENTS DESCRIPTION
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299