LG T910B Service Manual page 24

IC401 Pin 18
4
waveform is right?
Q720 Collector waveform
5
17
waveform is right?
18
waveforms are right?
Q706 base, collector
15 16
waveforms are right?
Check if DC voltage of
wave is Variable.
Waveforms
4
15
Q706, Base
7. H_Deflection Failure
YES
is right?
YES
Q719 drain
YES
Q705 drain
YES
8. Invariable H_Size
IC401 PIN 35
17
IC401, #18
16
NO
NO
NO
NO
NO
NO
18
Q719, Drain
5
Q706, Collector
- 24 -
Replace IC401
1. check 15V LINE
2. Replace Q720
Replace Q719
Check and Replace Q705
Check and replace Q706, R730
R734 and D709.Check DY
connector connection.
Check and replace IC401.
Q705, Drain
Q720 Collector