Pioneer SC-LX75 - Page 43

34
SC-57
1
2 3 4
A
B
C
D
E
F
1
2 3 4
This is just for general reference and does not including every single case.
No FL DISPLAY
Dimmer?
No
"FL OFF"LED
Light on?
Yes
No
JP3001 6-7pin 4.3Vac?
Yes
No
Check the path of FL AC1 and 2
DISPLAY ASSY -> F-IN BRIDGE ASSY
-> INTERFACE ASSY -> FB-
CONNECT ASSY -> FRONT BRIDGE
ASSY -> REG ASSY -> MAIN TRANS
V3301 1-62pin 4.3Vac?
No
V3301(FL Display)
Damage?
Yes
No
Yes
Replace V3301
Check FL AC1, 2 power supply
path or replace DISPLAY ASSY
JP3005 3pin -30V (VF)?
JP3005 4pin +5V?
Diagnose REG ASSY
(arround IC7601,D7625)
or replace REG ASSY
No
Yes
Check the path of V+5_V,-VF
(Signal path is same as FL AC1 and 2)
All NG
All NG
Replace Transformer
Diagnose or replace
NG ASSY
Other results
Other results
Diagnose the circuits
(arround D3208)
or replace DISPLAY ASSY
Diagnose arround IC3201 or replace
DISPLAY ASSY
Check DISPLAY ASSY
X3201 Oscillating
Yes
No
Replace X3201, IC3201 or DISPLAY
ASSY
NO FL DISPLAY