Tuner Troubleshooting - LG LRM-519 Service Manual

8. TUNER TROUBLESHOOTING

Tuner problem
YES
NO
TU500(2,6-pin)
+5V Input OK
YES
NO
TU500(8-pin) +30V
Input OK
YES
NO
J900 (2-pin) Check
YES
Tuner OK
NO
IC803 (4-pin)
Under +2.5V OK
YES
IC803 Check
J900 (2-pin) Check
NO
R651,652,724,
725 Soldering Ok
YES
IC513 Check
3-10
Q815, R881~883,
R839 Check
R651, 652, 724,
725 Re-soldering