3
COMPONENTS DESCRIPTION
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Synthesizer Unit (X14-6212-71)
Ref.No
Application / Function
Operation / Condition
IC1
Dolby B / Tape EQ amplifier
Playback EQ / Dolby B / between music detection
IC2
Motor driver
For cassette mechanism
IC12
Ope-amplifier
RDS noise amplifier
IC13
RDS decoder
RDS decode
IC21
Switch / Ope-amplifier
CD/TAPE switch
IC22
Electronic volume
BASS/TRE/MPX/EV
IC31,32
Ope-amplifier
FIX-EQ
IC41
Power amplifier
4 channel/35W power amplifier
IC71
AVR control
AUDIO+8V power supply
IC72
Ope-amplifier
1/2VCC output
IC81
System computer
System control
IC82
Reset IC
Reset detection
IC84
EEP-ROM
Memory backup
Q1
Cassette mechanism main motor power switch
Cassette mechanism main motor
Q2
Cassette mechanism main motor power switch
Pch-SW
Q3
Gain switching when tape selected music
Pch-SW, ON when playback a tape
Q94
P-ANT circuit control switch
P-ANT circuit control
Q101
FM power switch
FM 8V
Q102
FM power switch
Pch-SW
Q103
AM power switch
AM 8V
Q104
AM power switch
Pch-SW
Q107
IF mode switch by force
Output “Lo” when WIDE
Q108
Noise amplifier
Noise detection ouput buffer
Q109,110
Noise amplifier
Noise detection time constant switching
Q201
Switch for source
Output “Lo” when TAPE
Q202
MUTE switch
CD mute
Q203
MUTE switch
ICll3 hard mute
Q204
MUTE switch
CD mute (Rch)
Q205
MUTE switch
CD mute (Lch)
Q601
AVR switch for DC/DC
Pch-SW
Q603
AVR for DC/DC
13V AVR
Q604
AVR control for DC/DC
13V AVR
Q605,606
AVR for lamp
9V AVR
Q607
AVR switch for lamp
Nch-SW
Q608
AVR control for lamp
9V AVR
Q609
SMALL detection
Output “Lo” when SMALL ON
Q701
AVR for CD mechanism
7V AVR
Q702
AVR control for CD mechanism
7V AVR
Q703
AVR switch for CD mechanism
7V AVR
Q704
AVR
8V AVR
Q705
AVR switch
8V AVR
GX-401EF2
