Components Description - Kenwood GX806EF2 Service Manual

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Synthesizer Unit (X14-9382-70)
Ref. No.
IC6 A pair of ope amps
IC10 A pair of ope amps
IC11 AM noise canceller IC
IC23 A pair of ope amps
IC101 RDS demodulation IC
IC203 Electronic volume
IC204 A pair of ope amps
IC401 Power amplifier
IC451 Power amplifier
IC502 I2C bus IC
IC771 A pair of NOR circuits
IC801 System microcomputer
IC802 Resetting IC
Q101 FM power supply switch
Q102 AM power supply switch
Q105 IF count detection
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Q107 RDS data buffer
L 13942296513
Q152 Noise amplifier
Q153 Noise amplifier
Q251 Mute switch
Q254 Switch built into electronic volume
Q353 Mid-point circuit power supply switch
Q354 Audio 8V power supply switch
Q355 Audio 8V power supply switch
Q356 Audio 8V power supply switch
Q358 Mid-point circuit switch
Q359 Audio 8V power supply switch
Q360 Audio 8V power supply switch
Q361 Mid-point circuit switch
Q383 Servo 8V power supply switch
Q384 Servo 8V power supply switch
Q385 Servo 8V power supply switch
Q403~405 DC offset detection switch
Q501 SYS_ON current buffer
Q502 SYS_OFF current buffer
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Q503 BUS_ON detection
Q505 BUS_OFF detection
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Q601 DC/DC switching
Q603 DC/DC switching

COMPONENTS DESCRIPTION

Application / Function
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Operation / Condition / Compatibility
RDS noise amplifier
CD isolation amplifier
AM noise canceller
Mid-point electric potential output amplifier
RDS demodulation
BASS/MID/TRE, MPX, mute, electronic volume
NAVI isolation, beep and NAVI addition circuit
4-ch power amplifier
Sub-woofer power amplifier
Sie-BUS communication
For hard muting
System controller
System reset detection
8V output for FM
8V output for AM
When IF count detected, Lo output
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RDS buffer output
3 6 7 1 3
When noise is detected, constant is switched.
Noise detection output buffer
Built into electric volume for muting
Switch built into electronic volume for switching FM/AM
When BU voltage 12V or less, lowers mid-point.
Audio 8V Darlington
Audio 8V constant current bias
Audio 8V driver
At the time of ACC OFF, discharges mid-point voltage.
Audio 8V P-ON detection switch
Audio 8V voltage return
At the time of ACC OFF, discharges mid-point voltage.
Servo 8V P-ON detection switch
Servo 8V driver
Servo 8V darlington
For DC offset voltage detection
When SYS_ON Lo, Hi output
When SYS_OFF Lo, Hi output
When Sie-BUS system ON, Hi input
u163
Sie-BUS system OFF, Hi input.
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For DC/DC
DC/DC driver+shottky barrier diode
GX806EF2
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9
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