Pioneer SC-LX75 - Page 42

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