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
AUX isolation
Power supply driver for 6CD mechanism Bu3.3V.
Power supply driver for 6CD/MD mechanism DSP5V.
Power supply driver for 6CD mechanism DSP3.3V.
For hardware mute.
System control
Detects system reset.
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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