Panasonic UF-5500 Service Manual page 178

UF-5500 / 4500
A
NO
Does CN510 pin1
output a signal?
YES
NO
Is the signal input to
3pin and 4pin of IC503?
YES
Do 10,11,12,13pin of IC503
output each signal?
YES
Are the solders at
NO
L365,L366,L367,L368,
L369,L370,L371 OK?
YES
Replace IC300.
CROSS REFERENCE:
Service Mode 5 (Diagnostic) (P.114)
Are the solders at
L363, L364 OK?
YES
Replace IC300.
NO
Replace the IC503.
Solder them again.
NO
Is the voltage of
CN510 3pin about 3V?
YES
NO
Does CN510 6pin output
a signal?
YES
NO
Does CN510 8pin output
a signal?
YES
Replace the CIS.
NO
Are the solders at R555,
Q518 OK?
YES
Is the emitter of Q518
3.3V?
YES
Is AL21 (NCCDON) of
IC300 0V?
YES
Replace the Q518.
Are the solders at L501,
R558, L360 OK?
YES
Replace IC300.
Are the solders at FLT500,
FLT501,R553,L361 OK?
YES
Replace IC300.
178
NO
Solder them again.
NO
Check the solders at
IC501,R522,R524,D504.
NO
Replace IC300.
NO
Solder them again.
NO
Solder them again.