Pioneer SC-71 Service Manual page 33

5
OTHER
This is just for general reference and does not including every single case.
12V Trig (SC-71/CUXJ only)
12V Trig
No
Check INTERFACE_SS ASSY
CN7101 11pin +12V
Yes
Diagnose INTERFACE_SS ASSY
(Circuits around Q7002,Q7006)
or replace INTERFACE_SS ASSY
RS-232C (SC-71/CUXJ only)
No
RS-232C
IR
IR
No
Remote Control
No
Check the signal path of
RMC
DISPLAY ASSY
No problem
Diagnose DISPLAY ASSY
(RMC signal path, around U6001,IC6001)
or replace DISPLAY ASSY
5
6
Check the power supply path of V+12_TRG
No
V-REG_SS ASSYINTERFACE_SS
ASSY
Diagnose V-REG_SS ASSY
(Circuits around IC7551)
or replace V-REG_SS ASSY
Diagnose 232C_SS ASSY
(around IC8201)
or replace 232C_SS ASSY
Still NG
Check the signal path of 232RX,232TX,232POW,232CDET
232C_SS ASSY  DIGITAL MAIN_L ASSY  V-REG_SS ASSY  DISPLAY ASSY(IC6001)
and check the power supply path of V+5R6_EV
PRIMARY ASSY  DIGITAL MAIN_L ASSY  232C_SS ASSY
Diagnose INTERFACE_SS ASSY(IR circuits)
Yes
or check the signal path of IR-IN
INTERFACE_SS ASSY  V-REG_SS ASSY  DISPLAY ASSY
or replace INTERFACE_SS ASSY
Repair or replace
NG
NG point
6
7
ALL NG
SC-71
7
8
Other results Repair or replace
NG point
8
A
B
C
D
E
F
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