Pioneer SC-99 Service Manual page 32

1
OTHER
This is just for general reference and does not including every single case.
A
12V Trig
12V Trig
Check INTERFACE_M ASSY
CN7002 4pin +12V
Diagnose INTERFACE_M ASSY
B
(Circuits around Q7008,Q7010)
or replace INTERFACE_M ASSY
RS-232C
RS-232C
Diagnose COMPONENT ASSY
(around IC8601)
or replace COMPONENT ASSY
C
Check the signal path of 232RX,232TX,232POW,232CDET
COMPONENT ASSY  DIGITAL MAIN ASSY  DISPLAY BRIDGE ASSY  DISPLAY ASSY(IC6001)
and check the power supply path of V+5R6_EV
PRIMARY ASSY  DIGITAL MAIN ASSY  COMPONENT ASSY
IR
IR
D
No
Remote Control
No
Check the signal path of
RMC
DISPLAY ASSY
E
No Problem
Diagnose DISPLAY ASSY
(RMC signal path, around U6001,IC6001)
or replace DISPLAY ASSY
F
32
1
2
No
Check the power supply path of V+12_TRG
No
REG ASSYFRONT BRIDGE ASSY
FB CONNECT ASSYINTERFACE_M ASSY
Yes
Diagnose REG ASSY
(Circuits around IC7611)
or replace REG ASSY
No
Still NG
Diagnose INTERFACE_M ASSY(IR circuits)
Yes
or check the signal path of IR-IN
INTERFACE_M ASSY  CONNECT_M ASSY  DIGITAL MAIN ASSY
 DISPLAY BRIDGE ASSY  DISPLAY ASSY or replace INTERFACE_M ASSY
Repair or replace
NG
NG point
2
3
ALL NG
SC-99
3
4
Other results Repair or
replace NG
point
4