LG E700S Service Manual - Page 16

No Horizontal Deflection

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4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK Q706? YES CHECK B+ VOLTAGE (50V)? YES CHECK T701(FBT) PIN 2 (31KHZ, 60V 69KHZ, 140V ? YES CHECK Q701 COLLECTOR WAVEFORM? 0V T YES TROUBLE IN T701, P701 NO TROUBLE IN Q706 NO TROUBLE IN 50V LINE NO TROUBLE IN Q719, Q720, D710 NO TROUBLE IN Q701 - 16 -

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4. NO HORIZONTAL DEFLECTION
NO H-DEFLECTION
(ONE VERTICAL LINE)
CHECK
Q706?
CHECK
B
+
VOLTAGE
(50V)?
CHECK
T701(FBT) PIN 2
(31KHZ, 60V
69KHZ, 140V ?
CHECK
Q701 COLLECTOR
WAVEFORM?
TROUBLE IN
Q706
TROUBLE IN
50V LINE
TROUBLE IN
Q719, Q720, D710
TROUBLE IN
Q701
TROUBLE IN
T701, P701
NO
NO
YES
YES
YES
YES
NO
NO
0V
T