Audio Troubleshooting - LG LRM-519 Service Manual

7. AUDIO TROUBLESHOOTING

Audio output
problem
YES
NO
IC500 (11-pin)
High = "1" OK
YES
NO
IC500 (5, 6, 10-pin) Clock
/ Data / Sync Input Check
YES
NO
IC500 (2, 3-pin) 24.576MHz
clock In/Out OK
YES
NO
IC502 (1, 7-pin)
Audio out OK
YES
IC104 Soldering
Check
System part check
NO
IC500 (1, 9-pin)
+3.3V out OK
YES
NO
IC500 (25, 38-pin)
+5.0V out Check
YES
IC500 soldering
Check
NO
IC502 (8-pin) +8.0V
input OK
YES
NO
R528, R529 C554,
C555 Soldering OK
YES
NO
F509, F511, F517,
F518 Soldering OK
YES
Audio Output OK
J900 Connector
Power Cable Check
B504 soldering OK
YES
J900 Connector
Power Cable Check
B506 Soldering
Check
Re-soldering
Re-soldering
3-9
NO
Re-soldering