Clarion DRZ9255 Service Manual page 22

Main PWB-A(B1) section 3/6
(AUX IN, Selector block)
4-ch RCA pin
L-ch (W)
AUX IN1
R-ch (R)
L-ch (W)
AUX IN2
R-ch
(R)
1 : To Main PWB 1/6 5 : To Main PWB 5/6
2 : To Main PWB 2/6
4 : To Main PWB 4/6
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IC305
74HC4066M
DRZ9255
HX-D2
DSP-A-GND
C359
100p