LG Flatron F720B User Manual

Q706 collecter waveform
is right?
16. High Voltage Failure
NO
NO
Replace T701
Check Q719,Q720
Check 50V line
Repeat the troubleshooting
Guide of H_deflection failure.
YES
YES
17. ABL Failure
YES
NO
Check and replace CRT
Input full white pattern to monitor.
Check P302, D801,
R801~803, R798.
Check and replace IC302
Check and replace T701
NO
YES
- 29 -
Q719, Drain Q706,Collector
IC302 Pin22
input exists and varies
with different patterns?
T701 Pin 6 Voltage exists?
18
Waveforms
21
18
21
YES
waveform is right?
Q719 drain
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LG Flatron F720B Specifications

General

Brand	LG
Model	Flatron F720B
Category	Monitor
Language	English