Tuner Function Check - LG MDD262 Service Manual

11. TUNER FUNCTION CHECK

TUNER function check
Check TUNER
module(TU601) operation.
Check IC200(BU4052)_PIN1, 12 input
waveform.
Check
IC200(BU4052)_PIN3, 13
output waveform and IC601
(BU4052)_PIN2,15 input
waveform.
Check IC801(MC4580)_
PIN2, 6 input waveform.
OK
YES
YES
YES
YES
YES
NO
Check TUNER module voltage(PIN2 : 9V).
NO
Check IC200(BU4052)_
PIN16 VDD, PIN8 VSS power.
Replace IC200. Replace IC200.
NO
Check IC801(MC4580)_
PIN4 VSS, PIN8 VDD power.
Replace IC801.
3-9
YES
YES