Dolby Noise Reduction Unit (X87-3052-70); Daughter Unit (X89-2542-71) - Kenwood GX-201KEF2 Service Manual

GX-201KEF2/LEF2/REF2/SEF2
QQ
3 7 63 1515 0
Ref. No.
Q28 Panel illumination switch
Q29 F differential indicator dimmer control
Q30 R differential indicator dimmer control
Q33 System reset detection
Q34 Dimmer current counter-measure
Q35 System reset detection
Q36,37 6CD breakup counter-measure

DOLBY NOISE REDUCTION UNIT (X87-3052-70)

Ref. No.
IC1 Dolby NR
Q1 Music sensor level switching

DAUGHTER UNIT (X89-2542-71)

Ref. No.
TE
L 13942296513
IC11 Various constant voltage power supply output
IC21 CAS servo 8V power supply
IC31 CD servo 8V power supply
Q101 Panel illumination power supply switch
Q201~203 CAS servo power supply switch
Q301~303 CD servo power supply switch
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COMPONENTS DESCRIPTION
Application / Function
Application / Function
Application / Function
x ao u163
y
i
2 9
8
Operation / Condition / Compatibility
When panel illumination ON, GND electrical potential
When dimmer OFF, GND electrical potential
When dimmer OFF, GND electrical potential
When system is reset, Hi output
When audio encoder ON, 5V output
When system is reset, Lo output
FL (H) discharge circuit
Operation / Condition / Compatibility
Dolby BNR, Cassette EQ, Music sensor
Gain switching of dolby IC
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
5V, 8V, 10V constant voltage power supply
For CAS servo
For CD servo
When illumination + input, 5V output
For CAS servo
For CD servo
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9