LG T910B Service Manual page 25

Check S1 ~ S4 signal.
Refer to the S-corrction table page?
S1~S4 signals are right at
each frequency block?
YES
Check and replace
C723, C726,C729,C737
Q721
Q711 ~ Q713, Q714~Q717
IC401 PIN6 Volt Check
31K: 4.4V, 68K: 1.4V
91K: 0.5V
YES
Q821 Collection Volt Check
31K: 5V, 68K: 13V
91K:15V
YES
Check L703
9. S Correction Failure
NO
10. H_Lin. Failure
NO
NO
HORIZONTAL
FREQUENCY(fH)
29=<Hf<34kHZ
34=<Hf<39kHZ
39=<Hf<44kHZ
44=<Hf<49kHZ
49=<Hf<52kHZ
52=<Hf<58kHZ
58=<Hf<62kHZ
62=<Hf<66kHZ
66=<Hf<71kHZ
71=<Hf<76kHZ
76=<Hf<81kHZ
81=<Hf<84kHZ
84=<Hf<89kHZ
89=<Hf<95kHZ
95=<Hf<120kHZ
- 25 -
Check and replace IC401.
Replace IC401.
Check 15 V line.
Check some parts around Q821.
Cs SIGNAL TABLE
CS1 CS2 CS3
L L L
L H
H
H L L
H L
L
H
L H
H
L H
H L H
H L H
H H
H
H H H
H H H
H H H
H H H
H H H
H H H
CS4
L
L
L
L
L
L
H
H
L
L
L
H
H
H
H