Pioneer SC-LX85 - Diagnosis; Diagnosis Flowchart

32
SC-57
1
2 3 4
A
B
C
D
E
F
1
2 3 4
5. DIAGNOSIS
5.1 DIAGNOSIS FLOWCHART
No Power
Error
Indications ?
Stand by
No
Yes
Yes
No
R efer to SM
"5.2 [3] Error Indications"
Other trouble.
FUSE FU4 OPEN ?
No
Yes
Diagnose or replace
PRIMARY ASSY
Check PRIMARY
ASSY JP51-1,2,3Pin
or DIGITAL MAIN ASSY
CN9501-1,2,3Pin +5.6V
No
Yes
Check DIGITAL MAIN
ASSY CN601-1,2Pin +5.6V
No
Check +5.6V line on DIGITAL MAIN ASSY
or Replace DIGITAL MAIN ASSY
Yes
Check DISPLAY ASSY
CN3001-38,39Pin +5.6V
No
Replace FFC DISPLAY BRIDGE ASSY
to DISPLAY ASSY
Yes
Check DISPLAY ASSY
C3021 +3.3V
No
Replace DISPLAY ASSY or
replace D3008 or L3001
Yes
Check DISPLAY BRIDGE ASSY
CN7651-38,39Pin +5.6V
Replace FFC DIGITAL MAIN ASSY
to DISPLAY BRIDGE ASSY
No
Yes
Check DISPLAY BRIDGE ASSY
CN7652-1,2Pin +5.6V
No
Replace
DISPLAY BRIDGE ASSY
Yes
Check DISPLAY ASSY
X3001 Oscillating
Check DISPLAY ASSY
L3001 +5V
No
Replace DISPLAY ASSY or
replace IC3003
Yes
No
Replace DISPLAY ASSY
Replace X3001
No
or
X3001 doesn't
oscilate
Replace IC3001
Yes
Check DISPLAY ASSY
IC3001 8pin +5V (XRESET)
No
Replace DISPLAY ASSY or
replace IC3002
Yes
Remove AC code and
remove CN9501. Insart
AC code and check
JP51-1,2,3Pin +5.6V?
Diagnose or replace
PRIMARY ASSY
No
Diagnose V+5R6_EV power supply
path after PRIMARY ASSY
Yes
This is just for general reference and does not including every single case.
A
NO POWER