LG KF750 Service Manual page 95

4. TROUBLE SHOOTING
EL sheet operating voltage generator
EL sheet operating voltage generator
(L900, D901, Q900, C903, R910 or R913)
(L900, D901, Q900, C903, R910 or R913)
Output must be 190V AC about 800KHz
TOUCH_3.1V
Replace U900
Replace U900
LGE Internal Use Only
TP17_BB
Check the output of C903
Check the output of C903
Output must be 190V AC about 800KHz
VREG_6.1V
C902
2.2u
L900
100uH
D901
RF051VA2S
D1 D2 D3 D4 D5
Q900
SIA450DJ
G
S1 S2
R912
100K
- 96 -
Multikey
C903
470pF
C905 C906
150p 0.1u
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