Diagnosis; Diagnosis Flowchart - Pioneer SC-65 Service Manual

1

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

NO POWER
A
This is just for general reference and does not including every single case.
No Power
Yes
Stand by
No
Yes
FUSE FU4 OPEN ?
No
B
Check PRIMARY
ASSY JP51-1,2,3 pin
or DIGITAL MAIN
ASSY CN9501-1,2,3 pin
+5.6V
Yes
Check DIGITAL MAIN ASSY
CN9501 -1,2 ,3 pin +5.6V
C
Yes
Check V-REG ASSY
CN7901 -38,39 pin +5.6V
Yes
Check V-REG ASSY
CN7902 -1,2 pin +5.6V
Yes
D
Check DISPLAY ASSY
CN3001-38,39 pin +5.6V
Yes
Check DISPLAY ASSY
L3001 +5V
Yes
Check DISPLAY ASSY
E
C3021 +3.3V
Yes
Check DISPLAY ASSY
X3001 oscillating
Yes
Check DISPLAY ASSY
IC3001 8 pin +5V
(XRESET)
F
Yes
A
30
1
2
Diagnose or replace
PRIMARY ASSY
Remove AC code and
No
remove CN9501. Insart
AC code and check
JP51-1,2,3 pin +5.6V?
Yes
No
Check +5.6V line on DIGITAL MAIN ASSY
or Replace DIGITAL MAIN ASSY
No
(DIGITAL MAIN ASSY to V-REG ASSY)
No
Replace V-REG ASSY
No
Replace FFC
(V-REG ASSY to DISPLAY ASSY)
Replace DISPLAY ASSY
No
or replace D3008 or L3001
Replace DISPLAY ASSY
No
or replace IC3003
No
Replace DISPLAY ASSY
No
Replace X3001
No
Replace DISPLAY ASSY
or replace IC3002
2
3
Error
No
Indications ?
Yes
Refer to SM
"5.2 [4] Error Indications"
No
Diagnose or replace
PRIMARY ASSY
Diagnose V+5R6_EV power supply
path after PRIMARY ASSY
Replace FFC
or X3001 doesn't
oscilate
SC-65
3
4
Other trouble.
Replace IC3001
4