Kenwood GX806EF2 Service Manual

CD RECEIVER

GX806EF2

SERVICE MANUAL

SUBARU GENUINE

Knob (VOL) (K23-1085-04)

VOL ADJ REG

T.I

BAND

PUSH

ON/VOL

BRIGHT

Model Model Name Parts No. Destination GX806E GX806EF2 86201SA200 Europe

DC cord for service : E30-3801-15

Panel assy (A64-3275-22)

Front glass (B10-4537-13)

NEWS

LOAD

COMPACT

DIGITALAUDIO

DISP SCN

LOCAL AS

RPT T/B

RDM

TONE BAL/

TUNE

TRACK

Knob (1.4) (K25-1629-03)

Knob (2.5) (K25-1630-03)

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).

Knob (3.6) (K25-1631-03)

GX806EF2

POWER SIGNAL & CONTROL

13.2V Q653

Q384

Q356

Q694

Q607

Q605

BU 5V

Q801

SERVO 8V

AUDIO 8V

Q101

FM SW 8V

Q102

AM SW 8V

IC23

VREF

6.8V

LAMP 10V

VFD DRIVER 34V

VFD FILAMENT

SW 5V

IC23

VREF

4.0V

ANT

EXT UNIT

Each lavel difference between sauce. (CD 1W OUTPUT)

AM FM CD CH 1kHz 0dB 0.0dB

BLOCK DIAGRAM

FM/AM FRONT-END

EEPROM

ISO+LPF

1.2Vrms

6CD MECHA

EXT CH 1.3Vrms

NAVI 1.2Vrms

1kHz 30% mod. -20.5dB

1kHz 40kHz dev. -9.0dB

FM 270mVrms AM 215mVrms

IC101

RDS

IC10

0.0dB

IC204

ISO

0.0dB

1kHz 0dB 0.0dB

IC11

N/C

LPF

-3.8dB

MIX

-4.5dB

ATT

-20.0dB

Q605 Q691

AVR

BEEP

IC203

E VOL FM MPX 7BAND EQ

FM:+10.0dB AM:+9.0dB CD:0.0dB EXT CH:-1.0dB NAVI:-20.0dB

MUTE LOGIC

MUTE

SYSTEM u-COM MUTE

IC801

IC1

PANEL u-COM

VFD KEY LAMP

-10.0dB

FAD BAL

IC802IC204

RESET

0.0dB

-7.0dB

BU DET

SUB WOOFER

FRONT

REAR

RESET

LAMPDC/DC AVR

P-MUTE

STANDBY

IC451

1ch P-AMP

4ch P-AMP

Q773

Q771

Q754

DIAGNOSTIC

Q803

+26.0dB

BU DET

ACC DET

ANT CONT

ILL+ DET

IC401

SUB WOOFER

FRONT SP

REAR SP

ACC

P ANT

TEL

SATELLITE SW

ILL+

: SIGNAL LINE

GX806EF2

COMPONENTS DESCRIPTION

● Synthesizer Unit (X14-9382-70)

Ref. No. Application / Function Operation / Condition / Compatibility

IC6 A pair of ope amps RDS noise amplifier IC10 A pair of ope amps CD isolation amplifier IC11 AM noise canceller IC AM noise canceller IC23 A pair of ope amps Mid-point electric potential output amplifier IC101 RDS demodulation IC RDS demodulation IC203 Electronic volume BASS/MID/TRE, MPX, mute, electronic volume IC204 A pair of ope amps NAVI isolation, beep and NAVI addition circuit IC401 Power amplifier 4-ch power amplifier IC451 Power amplifier Sub-woofer power amplifier IC502 I2C bus IC Sie-BUS communication IC771 A pair of NOR circuits For hard muting IC801 System microcomputer System controller IC802 Resetting IC System reset detection Q101 FM power supply switch 8V output for FM Q102 AM power supply switch 8V output for AM Q105 IF count detection When IF count detected, Lo output Q107 RDS data buffer RDS buffer output Q152 Noise amplifier When noise is detected, constant is switched. Q153 Noise amplifier Noise detection output buffer Q251 Mute switch Built into electric volume for muting Q254 Switch built into electronic volume Switch built into electronic volume for switching FM/AM Q353 Mid-point circuit power supply switch When BU voltage 12V or less, lowers mid-point. Q354 Audio 8V power supply switch Audio 8V Darlington Q355 Audio 8V power supply switch Audio 8V constant current bias Q356 Audio 8V power supply switch Audio 8V driver Q358 Mid-point circuit switch At the time of ACC OFF, discharges mid-point voltage. Q359 Audio 8V power supply switch Audio 8V P-ON detection switch Q360 Audio 8V power supply switch Audio 8V voltage return Q361 Mid-point circuit switch At the time of ACC OFF, discharges mid-point voltage. Q383 Servo 8V power supply switch Servo 8V P-ON detection switch Q384 Servo 8V power supply switch Servo 8V driver Q385 Servo 8V power supply switch Servo 8V darlington Q403~405 DC offset detection switch For DC offset voltage detection Q501 SYS_ON current buffer When SYS_ON Lo, Hi output Q502 SYS_OFF current buffer When SYS_OFF Lo, Hi output Q503 BUS_ON detection When Sie-BUS system ON, Hi input Q505 BUS_OFF detection Sie-BUS system OFF, Hi input. Q601 DC/DC switching For DC/DC Q603 DC/DC switching DC/DC driver+shottky barrier diode

GX806EF2

COMPONENTS DESCRIPTION

Ref. No. Application / Function Operation / Condition / Compatibility

Q604 DC/DC switching DC/DC voltage detection Q605 Filament power supply switch Filament power supply driver Q606 Filament power supply switch Filament power supply darlington Q607 DC/DC power supply switch DC/DC driver Q608 Filament power supply switch For filament power supply Q609 DC/DC power supply switch DC/DC driver Q610 DC/DC power supply switch For DC/DC detection Q612 DC/DC power supply switch DC/DC darlington Q653 BU5V power supply switch BU5V driver Q654 BU5V power supply switch BU5V darlington Q691 LAMP power supply switch ILL detection for LAMP Q694 LAMP power supply switch LAMP driver Q751 P-ANT control switch When ACC_ON, Hi output Q752,753 P-ANT control switch When ACC_ON, BU electric potential output Q754 P-ANT short-circuit protection P-ANT short-circuit protection Q771 ACC detection When ACC ON, Lo output Q772 BU detection When BU ON, Lo output Q773 BU over voltage detection switch BU over voltage detection Q801 P-ON5V power supply switch For P-ON5V Q802 Sie-BUS mute output When mute ON, Hi output Q803 Illumi detection switch When illumi detected, Lo output Q804 Hard reset switch When HARD_RESET ON, Lo output Q805 Sie-BUS reset output switch When Sie-BUS reset, Hi output Q807 DC/DC power supply switch For DC/DC detection

● Switch Unit (X34-3142-70)

Ref. No. Application / Function Operation / Condition / Compatibility

IC1 Display control microcomputer VFD control, Key loading Q1 P-ON5V power supply switch For P-ON 5V Q2 Filament power supply switch For filament

GX806EF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

● Main Microcomputer : 703037HYGFM01 (X14-938 : IC801)

Pin No. Pin Name I/O Function Processing Operation Description

1 SP_DATA_S O Data output to panel microcomputer UART 19200bps 2 R_DATA I RDS data RDS data input 3PLL_SDA I/O EEPROM data EEPROM data input/output 3PLL_SDA I/O PLL data PLL data input/output 4 R_QUAL I RDS quality RDS quality 5 PLL_SCL O EEPROM clock EEPROM clock output 5 PLL_SCL O PLL clock PLL clock output 6~8 NC O Not used. Not used. 9 EVDD 10 EVSS 11 BEEP O BEEP output 2kHz BEEP output (pulse), When not operation : L 12 IFC I F/E IFC OUT input terminal L : Station found, H : Station not found 13 AM+B O AM power supply control AM : H, Other : L 14 FM+B O FM power supply control FM : H, Other : L 15~20 NC O Not used Not used 21 Icc/VPP - (Write to flash memory) (Write to flash memory) 22 CDX_MTS O 6CD communication request output 6CD communication request output 23 NC O Not used Not used 24 ILL_DET I Illumi detection Illumi ON : L 25 NC O Not used Not used 26 BUSDI I F-BUS data IN BUS data input 27 BUSDO O F-BUS data OUT BUS data output 28 VOL_SDA I/O E-VOL data 29 VOL_SCL O E-VOL clock 30,31 NC O Not used Not used 32 MUTE O VOL mute Mute : H, Normal : L

33 AFS O

34 RESET - System reset input Reset : L, Resetting voltage : 4.2V 35 XT1 I Sub-system clock oscillation terminal Not used 36 XT2 O Sub-system clock oscillation terminal Not used 37 REGC 38 X1 - Main system clock oscillation terminal 12.582MHz 39 X2 - Main system clock oscillation terminal 12.582MHz 40 VSS - GND electric potential 41 VDD - 5V electric potential 42 NC - Not used Not used 43~46 NC O Not used Not used 47 HARD_RESET O Hard reset output Reset : H, Others : L

When noise is detected, constant is During FM/AM seek : L, When RDS in operation : H, switched When other than RDS in operation : L

GX806EF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Function Processing Operation Description

48 P_STBY O P-AMP standby control ACC ON, POWER ON : H, Others : L

Mute : L, Others : H

49 P_MUTE O P-AMP mute control This muting should not be used for timings that would cause

cut in the beginning portion, such as searches during play. 50 SVR O For P-AMP discharge Normal : L, Discharge : H 51 ANT_CON O ANT AMP power supply control ACC ON : H, Others : L 52,53 NC O Not used Not used 54 ONREQ I F-BUS ON request System ON request : L 55 SYS_ON O F-BUS ON output System ON : L 56 CDX_STM I 6CD communication request input Communication request : L 57 SYS_OFF O F-BUS OFF output System OFF : L 58 BVDD - 5V electric potential 59 BVSS - GND electric potential 60 BUS_STBY O BUS_IC standby control System ON : H 61 PON O AVR control (Audio, MECHA) Power supply ON : L, OFF : H (Stable time : 400ms) 62 DC_DC O DC/DC power supply control 63~68 NC O Not used Not used 69 TELMUTE I TEL mute TEL_MUTE ON : L, Others : H 70 CDX_ACC O 6CD ACC Operation : L, Others : H 71 CDX_RST O 6CD reset Reset : L, Others : H 72 CDX_EJEREQ O 6CD eject request Eject : L, Others : H 73 NC O Not used PON : H, Others : L 74 AVDD - 5V electric potential 75 AVSS - GND electric potential 76 AVREF - A/D port reference voltage input 77 CDX_DDCNT I 6CD servo control 6CD ON : H, Others : L 78 CDX_MUTE I 6CD Mute request 6CD mute : L, Normal : H 79 NC O Not used Not used 80 DCERR I DC offset detection Offset detected at 1.0V or more 81 DIAG I For test mode Test mode : L, Normal : H 82 TYPE I Destination setting Initial : L

83 Protection_FL I

84 Protection_Audio I

85 NOISE I FM noise detection With noise value of 2.9V or less, station found authorized 86 SMTER I S-meter 87 NC I Not used Not used 88 REMOCON I Vehicle satellite switch input Resistance divider-type vehicle remote controller 89 SP_REQ_S O Request to panel microcomputer ON : H, OFF : L

FL+B detection of output short-circuits When L after 50ms of DC-DC turning active, from power supply DC-DC is turned OFF. Short-circuit detection of audio 8V When terminal condition is L after 30ms of PON active, power supply output PON is turned OFF.

S-meter value : By the data written to EEPROM, seek is stopped

GX806EF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Function Processing Operation Description

90 SP_REQ_P I Request from panel microcomputer ON request : H 91 ACC_DET I ACC detection ACC ON : L, ACC OFF : H, Detection voltage : 8.5V 92 OFF_REQ I F-BUS OFF request System OFF request : L

93 BU_DET I BU detection

94 SP_RST O Reset to panel microcomputer

Momentary power down detection

95 SP_BKUP O

output to panel microcomputer 96 R_CLK I RDS clock RDS clock 97 CDX_SI I 6CD data input SIO 250kHz 98 CDX_SO O 6CD data output SIO 250kHz 99 CDX_CLK I 6CD clock input SIO 250kHz 100 SP_DATA_P I Data output from panel microcomputer UART 19200bps

BU ON : L, BU OFF (During momentary power down) : H Detection voltage : 8.5V Normal : H, When reset : L (2 pulses), When communication error occurs immediately after reset, then reset is triggered.

Momentary power down : L, Normal : H

● Panel Microcomputer : MB90561A-364 (X34-314 : IC1)

Pin No. Pin Name I/O Function Processing Operation Description

1~3 NC O Not Used 4~6 KEY1~KEY3 I Six division key reading Key reading of analog voltage values 7~11 NC O Not Used 12 AVCC A/D converter power supply VCC 13 AVR A/D converter REF voltage input SW_5V electrical potential 14 AVSS A/D converter GND connection GND electrical potential 15 SP_DATA_S I Data input from SYS_COM Communication speed : 19200bps with 30ms interval 16 SP_DATA_P O Data output to SYS_COM Communication speed : 19200bps with 20ms interval

17 SP_REQ_P O Request to SYS_COM

18 SP_BKUP I 19 MD0 I For FLASH ROM writing H : Normal mode, L : FLASH ROM writing mode 20 SP_RST I Reset input from SYS_COM 4 cycle time L after H input, H input thereafter 21 MD1 I For FLASH ROM writing H : Normal and FLASH ROM writing mode, L : No setting 22 MD2 I For FLASH ROM writing H : FLASH ROM writing mode, L : Normal mode 23 X0 Microcomputer clock oscillator 4.0MHz 24 X1 Microcomputer clock oscillator 4.0MHz 25 VSS1 Current GND GND electrical potential 26 P00 I/O Setting for FLASH ROM writing method L : Serial writing permission

Power down detection input from SYS_COM

Generates pulse signal for triggering standby mode of SYS_COM. After confirming on SP_REQ_S signal, output is stopped. Momentary power down detection

GX806EF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Function Processing Operation Description

27 P01 I/O Setting for FLASH ROM writing method H : Serial writing permission 28 NC O Not Used

29 SW_5V O VFD power supply ON signal

30 POWER I POWER L : ON, H : OFF 31 ENC_DW I Rotary encoder SW (B-phase waveform) Pulses are port input by 1ms-cycle timer 32 ENC_UP I Rotary encoder SW (A-phase waveform) Pulses are port input by 1ms-cycle timer 33 NC O Not Used 34 SP_REQ_S I Request from SYS_COM Interruption occurs only on H level 35 EJECT I EJECT L : ON, H : OFF 36~42 NC O Not Used

43 FL_BLK O

44~47 NC O Not Used 48 SDA I/O E2PRROM serial data Input/output to E2PROM 49 SCL O E2PROM serial clock Output to E2PROM 50 VSS2 Power supply GND GND electrical potential 51~56 NC O Not Used 57 VCC Power supply input Bu5V electrical potential 58 C 59 NC O Not Used 60 FL_SO O FL data output terminal Display data transmission to VFD. 0.5MHz 61 FL_CLK_OUT O FL clock output terminal Synchronization clock output for VFD serial communication 62 FL_LAT O FL data latch control terminal When not displaying, output OFF count is carried out 63,64 NC O Not Used

FL data blanking output terminal (FL tube brightness adjustment)

Processing terminal for voltage stabilizing

When stopped (L) : Power supply OFF When in normal operation (H) : Power supply ON

Brightness adjustment is conducted by duty ratio

0.1µF condenser connection

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