LG T710BH 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 Q705 COLLECTOR WAVEFORM? 0V T YES TROUBLE IN T701, P701 NO TROUBLE IN Q706 NO TROUBLE IN 50V LINE NO TROUBLE IN Q719, Q703, D704, D710 NO TROUBLE IN Q705 - 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
Q705 COLLECTOR
WAVEFORM?
TROUBLE IN
Q706
TROUBLE IN
50V LINE
TROUBLE IN
Q719, Q703, D704, D710
TROUBLE IN
Q705
TROUBLE IN
T701, P701
NO
NO
YES
YES
YES
YES
NO
NO
0V
T