Pioneer SC-LX85 Service Manual page 42

5
A
Check DISPLAY ASSY
IC3001 58pin (POWKEY)
HL when press power key?
Yes
Check DISPLAY ASSY
CN3001 26pin (DVCPOW)
LH when press power key?
Yes
Check DISPLAY ASSY
CN3001 1pin (ACRY)
LH when press power key?
Yes
Check PRIMARY ASSY
JP51 7pin (ACRY)
LH when press power key?
Yes
Does RY51 turn on
when press power key?
Yes
Check DIGITAL MAIN ASSY
CN601 14pin (DVCPOW)
LH when press power key?
Yes
Diagnose or replace
DIGITAL MAIN ASSY
5
6
No
Check POWKEY signal path
No
Check DVCPOW signal path
No
Check ACRY signal path
Check ACRY signal path
No
DISPLAYDISPLAY BRIDGE
DIGITAL MAINPRIMARY ASSY
Check the circuits arround RY71
No
or replace PRIMARY ASSY
Check DVCPOW signal path
No
DISPLAYDISPLAY BRIDGE
DIGITAL MAIN ASSY
SC-57
6
7
No Problem Replace DISPLAY ASSY
or replace IC3001
Replace DISPLAY ASSY
No Problem
or replace IC3001
7
8
A
B
C
D
E
F
33
8