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CD RECEIVER
GX806EF2
SERVICE MANUAL
© 2004-7 CREATED IN JAPAN B53-0186-00 (N) 0
SUBARU GENUINE
Model |
Model Name |
Parts No. |
Destination |
GX806E |
GX806EF2 |
86201SA200 |
Europe |
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DC cord for service |
: E30-3801-15 |
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Knob (VOL) |
Panel assy |
Front glass |
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(K23-1085-04) |
(A64-3275-22) |
(B10-4537-13) |
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T.I |
VOL ADJ |
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REG |
NEWS |
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LOAD |
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PUSHON/VOL |
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CD |
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BAND |
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COMPACT |
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BRIGHT |
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DIGITAL AUDIO |
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DISP |
SCN |
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LOCAL |
AS |
TUNE |
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TRACK |
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RPT |
T/B |
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RDM |
TONE / BAL |
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Knob (1.4) |
Knob (2.5) |
Knob (3.6) |
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(K25-1629-03) |
(K25-1630-03) |
(K25-1631-03) |
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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 (D40-1195-05).
GX806EF2
BLOCK DIAGRAM
POWER
BU 13.2V
Q653 |
ANT |
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BU |
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5V |
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Q801 |
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SW |
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5V |
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Q384 |
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SERVO |
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8V |
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Q356 |
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AUDIO |
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8V |
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Q101 |
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FM SW |
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8V |
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Q102 |
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AM SW |
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8V |
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IC23 |
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VREF |
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6.8V |
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IC23 |
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VREF |
Q694 |
4.0V |
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LAMP |
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10V |
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Q607 |
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VFD DRIVER |
EXT |
34V |
UNIT |
Q605 |
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VFD FILAMENT 
SIGNAL & CONTROL
A1 |
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IC203 |
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FM |
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E VOL |
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SUB WOOFER |
FM/AM |
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IC11 |
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270mVrms |
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FM MPX |
-10.0dB |
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FRONT-END |
AM |
N/C |
LPF |
7BAND EQ |
FAD |
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215mVrms |
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-3.8dB |
-4.5dB |
FM:+10.0dB |
BAL |
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IC101 |
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AM:+9.0dB |
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RDS |
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CD:0.0dB |
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EXT CH:-1.0dB |
0.0dB |
FRONT |
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NAVI:-20.0dB |
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-7.0dB |
REAR |
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IC204 |
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IC802 |
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MIX |
ATT |
MUTE |
RESET |
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-20.0dB |
LOGIC |
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EEPROM |
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BEEP |
MUTE |
BU DET |
RESET |
P-MUTE STANDBY DIAGNOSTIC |
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ISO+LPF IC10 |
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SYSTEM |
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0.0dB |
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u-COM |
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IC801 |
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1.2Vrms |
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6CD |
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MECHA |
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EXT CH |
1.3Vrms |
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IC204 |
Q605 |
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Q691 |
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ISO |
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NAVI |
1.2Vrms |
DC/DC |
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LAMP |
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0.0dB |
AVR |
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AVR |
Each lavel difference between sauce. |
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IC1 |
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(CD 1W OUTPUT) |
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AM |
1kHz 30% mod. |
-20.5dB |
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PANEL u-COM |
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FM |
1kHz 40kHz dev. |
-9.0dB |
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CD |
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1kHz 0dB |
0.0dB |
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CH |
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1kHz 0dB |
0.0dB |
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VFD |
KEY |
LAMP |
IC451
1ch P-AMP |
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+26.0dB |
SUB |
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WOOFER |
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IC401 |
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+26.0dB |
FRONT |
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SP |
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4ch P-AMP |
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+26.0dB |
REAR |
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SP |
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Q773 |
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BU |
BU |
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DET |
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Q771 |
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ACC |
ACC |
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DET |
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Q754 |
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ANT |
P ANT |
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CONT |
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TEL |
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MUTE |
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SATELLITE |
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Q803 |
SW |
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ILL+ |
ILL+ |
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DET |
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: SIGNAL LINE
2
GX806EF2
COMPONENTS DESCRIPTION
● Synthesizer Unit (X14-9382-70)
Ref. No. |
Application / Function |
Operation / Condition / Compatibility |
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IC6 |
A pair of ope amps |
RDS noise amplifier |
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IC10 |
A pair of ope amps |
CD isolation amplifier |
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IC11 |
AM noise canceller IC |
AM noise canceller |
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IC23 |
A pair of ope amps |
Mid-point electric potential output amplifier |
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IC101 |
RDS demodulation IC |
RDS demodulation |
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IC203 |
Electronic volume |
BASS/MID/TRE, MPX, mute, electronic volume |
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IC204 |
A pair of ope amps |
NAVI isolation, beep and NAVI addition circuit |
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IC401 |
Power amplifier |
4-ch power amplifier |
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IC451 |
Power amplifier |
Sub-woofer power amplifier |
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IC502 |
I2C bus IC |
Sie-BUS communication |
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IC771 |
A pair of NOR circuits |
For hard muting |
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IC801 |
System microcomputer |
System controller |
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IC802 |
Resetting IC |
System reset detection |
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Q101 |
FM power supply switch |
8V output for FM |
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Q102 |
AM power supply switch |
8V output for AM |
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Q105 |
IF count detection |
When IF count detected, Lo output |
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Q107 |
RDS data buffer |
RDS buffer output |
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Q152 |
Noise amplifier |
When noise is detected, constant is switched. |
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Q153 |
Noise amplifier |
Noise detection output buffer |
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Q251 |
Mute switch |
Built into electric volume for muting |
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Q254 |
Switch built into electronic volume |
Switch built into electronic volume for switching FM/AM |
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Q353 |
Mid-point circuit power supply switch |
When BU voltage 12V or less, lowers mid-point. |
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Q354 |
Audio 8V power supply switch |
Audio 8V Darlington |
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Q355 |
Audio 8V power supply switch |
Audio 8V constant current bias |
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Q356 |
Audio 8V power supply switch |
Audio 8V driver |
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Q358 |
Mid-point circuit switch |
At the time of ACC OFF, discharges mid-point voltage. |
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Q359 |
Audio 8V power supply switch |
Audio 8V P-ON detection switch |
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Q360 |
Audio 8V power supply switch |
Audio 8V voltage return |
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Q361 |
Mid-point circuit switch |
At the time of ACC OFF, discharges mid-point voltage. |
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Q383 |
Servo 8V power supply switch |
Servo 8V P-ON detection switch |
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Q384 |
Servo 8V power supply switch |
Servo 8V driver |
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Q385 |
Servo 8V power supply switch |
Servo 8V darlington |
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Q403~405 |
DC offset detection switch |
For DC offset voltage detection |
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Q501 |
SYS_ON current buffer |
When SYS_ON Lo, Hi output |
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Q502 |
SYS_OFF current buffer |
When SYS_OFF Lo, Hi output |
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Q503 |
BUS_ON detection |
When Sie-BUS system ON, Hi input |
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Q505 |
BUS_OFF detection |
Sie-BUS system OFF, Hi input. |
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Q601 |
DC/DC switching |
For DC/DC |
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Q603 |
DC/DC switching |
DC/DC driver+shottky barrier diode |
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3
GX806EF2
COMPONENTS DESCRIPTION
Ref. No. |
Application / Function |
Operation / Condition / Compatibility |
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Q604 |
DC/DC switching |
DC/DC voltage detection |
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Q605 |
Filament power supply switch |
Filament power supply driver |
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Q606 |
Filament power supply switch |
Filament power supply darlington |
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Q607 |
DC/DC power supply switch |
DC/DC driver |
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Q608 |
Filament power supply switch |
For filament power supply |
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Q609 |
DC/DC power supply switch |
DC/DC driver |
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Q610 |
DC/DC power supply switch |
For DC/DC detection |
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Q612 |
DC/DC power supply switch |
DC/DC darlington |
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Q653 |
BU5V power supply switch |
BU5V driver |
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Q654 |
BU5V power supply switch |
BU5V darlington |
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Q691 |
LAMP power supply switch |
ILL detection for LAMP |
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Q694 |
LAMP power supply switch |
LAMP driver |
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Q751 |
P-ANT control switch |
When ACC_ON, Hi output |
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Q752,753 |
P-ANT control switch |
When ACC_ON, BU electric potential output |
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Q754 |
P-ANT short-circuit protection |
P-ANT short-circuit protection |
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Q771 |
ACC detection |
When ACC ON, Lo output |
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Q772 |
BU detection |
When BU ON, Lo output |
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Q773 |
BU over voltage detection switch |
BU over voltage detection |
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Q801 |
P-ON5V power supply switch |
For P-ON5V |
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Q802 |
Sie-BUS mute output |
When mute ON, Hi output |
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Q803 |
Illumi detection switch |
When illumi detected, Lo output |
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Q804 |
Hard reset switch |
When HARD_RESET ON, Lo output |
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Q805 |
Sie-BUS reset output switch |
When Sie-BUS reset, Hi output |
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Q807 |
DC/DC power supply switch |
For DC/DC detection |
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● Switch Unit (X34-3142-70)
Ref. No. |
Application / Function |
Operation / Condition / Compatibility |
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IC1 |
Display control microcomputer |
VFD control, Key loading |
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Q1 |
P-ON5V power supply switch |
For P-ON 5V |
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Q2 |
Filament power supply switch |
For filament |
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4
GX806EF2
MICROCOMPUTER’S TERMINAL DESCRIPTION
● Main Microcomputer : 703037HYGFM01 (X14-938 : IC801)
Pin No. |
Pin Name |
I/O |
Function |
Processing Operation Description |
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1 |
SP_DATA_S |
O |
Data output to panel microcomputer |
UART 19200bps |
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2 |
R_DATA |
I |
RDS data |
RDS data input |
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3 |
PLL_SDA |
I/O |
EEPROM data |
EEPROM data input/output |
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3 |
PLL_SDA |
I/O |
PLL data |
PLL data input/output |
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4 |
R_QUAL |
I |
RDS quality |
RDS quality |
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5 |
PLL_SCL |
O |
EEPROM clock |
EEPROM clock output |
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5 |
PLL_SCL |
O |
PLL clock |
PLL clock output |
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6~8 |
NC |
O |
Not used. |
Not used. |
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9 |
EVDD |
- |
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10 |
EVSS |
- |
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11 |
BEEP |
O |
BEEP output |
2kHz BEEP output (pulse), When not operation : L |
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12 |
IFC |
I |
F/E IFC OUT input terminal |
L : Station found, H : Station not found |
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13 |
AM+B |
O |
AM power supply control |
AM : H, Other : L |
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14 |
FM+B |
O |
FM power supply control |
FM : H, Other : L |
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15~20 |
NC |
O |
Not used |
Not used |
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21 |
Icc/VPP |
- |
(Write to flash memory) |
(Write to flash memory) |
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22 |
CDX_MTS |
O |
6CD communication request output |
6CD communication request output |
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23 |
NC |
O |
Not used |
Not used |
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24 |
ILL_DET |
I |
Illumi detection |
Illumi ON : L |
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25 |
NC |
O |
Not used |
Not used |
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26 |
BUSDI |
I |
F-BUS data IN |
BUS data input |
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27 |
BUSDO |
O |
F-BUS data OUT |
BUS data output |
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28 |
VOL_SDA |
I/O |
E-VOL data |
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29 |
VOL_SCL |
O |
E-VOL clock |
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30,31 |
NC |
O |
Not used |
Not used |
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32 |
MUTE |
O |
VOL mute |
Mute : H, Normal : L |
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33 |
AFS |
O |
When noise is detected, constant is |
During FM/AM seek : L, When RDS in operation : H, |
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switched |
When other than RDS in operation : L |
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34 |
RESET |
- |
System reset input |
Reset : L, Resetting voltage : 4.2V |
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35 |
XT1 |
I |
Sub-system clock oscillation terminal |
Not used |
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36 |
XT2 |
O |
Sub-system clock oscillation terminal |
Not used |
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37 |
REGC |
- |
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38 |
X1 |
- |
Main system clock oscillation terminal |
12.582MHz |
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39 |
X2 |
- |
Main system clock oscillation terminal |
12.582MHz |
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40 |
VSS |
- |
GND electric potential |
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41 |
VDD |
- |
5V electric potential |
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42 |
NC |
- |
Not used |
Not used |
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43~46 |
NC |
O |
Not used |
Not used |
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47 |
HARD_RESET |
O |
Hard reset output |
Reset : H, Others : L |
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5
GX806EF2
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. |
Pin Name |
I/O |
Function |
Processing Operation Description |
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48 |
P_STBY |
O |
P-AMP standby control |
ACC ON, POWER ON : H, Others : L |
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Mute : L, Others : H |
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49 |
P_MUTE |
O |
P-AMP mute control |
This muting should not be used for timings that would cause |
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cut in the beginning portion, such as searches during play. |
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50 |
SVR |
O |
For P-AMP discharge |
Normal : L, Discharge : H |
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51 |
ANT_CON |
O |
ANT AMP power supply control |
ACC ON : H, Others : L |
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52,53 |
NC |
O |
Not used |
Not used |
|
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54 |
ONREQ |
I |
F-BUS ON request |
System ON request : L |
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55 |
SYS_ON |
O |
F-BUS ON output |
System ON : L |
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56 |
CDX_STM |
I |
6CD communication request input |
Communication request : L |
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57 |
SYS_OFF |
O |
F-BUS OFF output |
System OFF : L |
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58 |
BVDD |
- |
5V electric potential |
|
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59 |
BVSS |
- |
GND electric potential |
|
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60 |
BUS_STBY |
O |
BUS_IC standby control |
System ON : H |
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61 |
PON |
O |
AVR control (Audio, MECHA) |
Power supply ON : L, OFF : H (Stable time : 400ms) |
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62 |
DC_DC |
O |
DC/DC power supply control |
|
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63~68 |
NC |
O |
Not used |
Not used |
|
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69 |
TELMUTE |
I |
TEL mute |
TEL_MUTE ON : L, Others : H |
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70 |
CDX_ACC |
O |
6CD ACC |
Operation : L, Others : H |
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71 |
CDX_RST |
O |
6CD reset |
Reset : L, Others : H |
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72 |
CDX_EJEREQ |
O |
6CD eject request |
Eject : L, Others : H |
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73 |
NC |
O |
Not used |
PON : H, Others : L |
|
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74 |
AVDD |
- |
5V electric potential |
|
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75 |
AVSS |
- |
GND electric potential |
|
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76 |
AVREF |
- |
A/D port reference voltage input |
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77 |
CDX_DDCNT |
I |
6CD servo control |
6CD ON : H, Others : L |
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78 |
CDX_MUTE |
I |
6CD Mute request |
6CD mute : L, Normal : H |
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79 |
NC |
O |
Not used |
Not used |
|
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80 |
DCERR |
I |
DC offset detection |
Offset detected at 1.0V or more |
|
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81 |
DIAG |
I |
For test mode |
Test mode : L, Normal : H |
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82 |
TYPE |
I |
Destination setting |
Initial : L |
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83 |
Protection_FL |
I |
FL+B detection of output short-circuits |
When L after 50ms of DC-DC turning active, |
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from power supply |
DC-DC is turned OFF. |
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84 |
Protection_Audio |
I |
Short-circuit detection of audio 8V |
When terminal condition is L after 30ms of PON active, |
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power supply output |
PON is turned OFF. |
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85 |
NOISE |
I |
FM noise detection |
With noise value of 2.9V or less, station found authorized |
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86 |
SMTER |
I |
S-meter |
S-meter value : By the data written to EEPROM, seek is stopped |
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87 |
NC |
I |
Not used |
Not used |
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88 |
REMOCON |
I |
Vehicle satellite switch input |
Resistance divider-type vehicle remote controller |
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89 |
SP_REQ_S |
O |
Request to panel microcomputer |
ON : H, OFF : L |
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6
GX806EF2
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. |
Pin Name |
I/O |
Function |
Processing Operation Description |
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90 |
SP_REQ_P |
I |
Request from panel microcomputer |
ON request : H |
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91 |
ACC_DET |
I |
ACC detection |
ACC ON : L, ACC OFF : H, Detection voltage : 8.5V |
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92 |
OFF_REQ |
I |
F-BUS OFF request |
System OFF request : L |
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93 |
BU_DET |
I |
BU detection |
BU ON : L, BU OFF (During momentary power down) : H |
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Detection voltage : 8.5V |
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94 |
SP_RST |
O |
Reset to panel microcomputer |
Normal : H, When reset : L (2 pulses), When communication |
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error occurs immediately after reset, then reset is triggered. |
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95 |
SP_BKUP |
O |
Momentary power down detection |
Momentary power down : L, Normal : H |
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output to panel microcomputer |
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96 |
R_CLK |
I |
RDS clock |
RDS clock |
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97 |
CDX_SI |
I |
6CD data input |
SIO 250kHz |
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98 |
CDX_SO |
O |
6CD data output |
SIO 250kHz |
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99 |
CDX_CLK |
I |
6CD clock input |
SIO 250kHz |
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100 |
SP_DATA_P |
I |
Data output from panel microcomputer |
UART 19200bps |
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● Panel Microcomputer : MB90561A-364 (X34-314 : IC1)
Pin No. |
Pin Name |
I/O |
Function |
Processing Operation Description |
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1~3 |
NC |
O |
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Not Used |
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4~6 |
KEY1~KEY3 |
I |
Six division key reading |
Key reading of analog voltage values |
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7~11 |
NC |
O |
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Not Used |
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12 |
AVCC |
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A/D converter power supply |
VCC |
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13 |
AVR |
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A/D converter REF voltage input |
SW_5V electrical potential |
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14 |
AVSS |
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A/D converter GND connection |
GND electrical potential |
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15 |
SP_DATA_S |
I |
Data input from SYS_COM |
Communication speed : 19200bps with 30ms interval |
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16 |
SP_DATA_P |
O |
Data output to SYS_COM |
Communication speed : 19200bps with 20ms interval |
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17 |
SP_REQ_P |
O |
Request to SYS_COM |
Generates pulse signal for triggering standby mode of SYS_COM. |
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After confirming on SP_REQ_S signal, output is stopped. |
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18 |
SP_BKUP |
I |
Power down detection input from SYS_COM |
Momentary power down detection |
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19 |
MD0 |
I |
For FLASH ROM writing |
H : Normal mode, L : FLASH ROM writing mode |
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20 |
SP_RST |
I |
Reset input from SYS_COM |
4 cycle time L after H input, H input thereafter |
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21 |
MD1 |
I |
For FLASH ROM writing |
H : Normal and FLASH ROM writing mode, L : No setting |
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22 |
MD2 |
I |
For FLASH ROM writing |
H : FLASH ROM writing mode, L : Normal mode |
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23 |
X0 |
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Microcomputer clock oscillator |
4.0MHz |
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24 |
X1 |
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Microcomputer clock oscillator |
4.0MHz |
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25 |
VSS1 |
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Current GND |
GND electrical potential |
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26 |
P00 |
I/O |
Setting for FLASH ROM writing method |
L : Serial writing permission |
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7
GX806EF2
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. |
Pin Name |
I/O |
Function |
Processing Operation Description |
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27 |
P01 |
I/O |
Setting for FLASH ROM writing method |
H : Serial writing permission |
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28 |
NC |
O |
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Not Used |
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29 |
SW_5V |
O |
VFD power supply ON signal |
When stopped (L) : Power supply OFF |
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When in normal operation (H) : Power supply ON |
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30 |
POWER |
I |
POWER |
L : ON, H : OFF |
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31 |
ENC_DW |
I |
Rotary encoder SW (B-phase waveform) |
Pulses are port input by 1ms-cycle timer |
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32 |
ENC_UP |
I |
Rotary encoder SW (A-phase waveform) |
Pulses are port input by 1ms-cycle timer |
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33 |
NC |
O |
|
Not Used |
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34 |
SP_REQ_S |
I |
Request from SYS_COM |
Interruption occurs only on H level |
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35 |
EJECT |
I |
EJECT |
L : ON, H : OFF |
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36~42 |
NC |
O |
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Not Used |
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43 |
FL_BLK |
O |
FL data blanking output terminal |
Brightness adjustment is conducted by duty ratio |
|
(FL tube brightness adjustment) |
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44~47 |
NC |
O |
|
Not Used |
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48 |
SDA |
I/O |
E2PRROM serial data |
Input/output to E2PROM |
|
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49 |
SCL |
O |
E2PROM serial clock |
Output to E2PROM |
|
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50 |
VSS2 |
|
Power supply GND |
GND electrical potential |
|
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51~56 |
NC |
O |
|
Not Used |
|
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57 |
VCC |
|
Power supply input |
Bu5V electrical potential |
|
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58 |
C |
- |
Processing terminal for voltage stabilizing |
0.1 F condenser connection |
|
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59 |
NC |
O |
|
Not Used |
|
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60 |
FL_SO |
O |
FL data output terminal |
Display data transmission to VFD. 0.5MHz |
|
|
|
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61 |
FL_CLK_OUT |
O |
FL clock output terminal |
Synchronization clock output for VFD serial communication |
|
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62 |
FL_LAT |
O |
FL data latch control terminal |
When not displaying, output OFF count is carried out |
|
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63,64 |
NC |
O |
|
Not Used |
|
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8
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