3-9
Copyright © 200
9
LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
11. TUNER FUNCTION CHECK
TUNER function check
YES
Check IC200(BU4052)_
PIN16 VDD, PIN8 VSS power.
NO
Check
IC200(BU4052)_PIN3, 13
output waveform and IC601
(BU4052)_PIN2,15 input
waveform.
Check TUNER module voltage(PIN2 : 9V).
YES
YES
YES
YES
NO
Check TUNER
module(TU601) operation.
YES
Check IC801(MC4580)_
PIN4 VSS, PIN8 VDD power.
YES
NO
Check IC801(MC4580)_
PIN2, 6 input waveform.
Replace IC200.
Replace IC200.
Replace IC801.
Check IC200(BU4052)_PIN1, 12 input
waveform.
OK