LG E700S Service Manual - Page 18

No Vertical Deflection

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6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK IC601 PIN 3 (15V)? YES CHECK IC601 PIN 7 (40V)? YES NO TROUBLE IN R603 15V LINE TROUBLE IN NO HIGH-VOLTAGE OUT CIRCUIT(FBT), D721, R606 CHECK NO TROUBLE IN IC701 PIN 12, 13? IC701 3V YES TROUBLE IN IC601, V-CIRCUIT - 18 -

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6. NO VERTICAL DEFLECTION
NO V-DEFLECTION
(ONE HORIZONTAL LINE)
CHECK
IC601 PIN 3
(15V)?
CHECK
IC601 PIN 7
(40V)?
CHECK
IC701 PIN 12, 13?
TROUBLE IN
R603 15V LINE
TROUBLE IN
HIGH-VOLTAGE OUT
CIRCUIT(FBT),
D721, R606
TROUBLE IN
IC701
TROUBLE IN
IC601, V-CIRCUIT
NO
NO
YES
YES
YES
NO
3V