LG Flatron F720B User Manual

CHECK
SCREEN CONTROL
KNOB OF FBT
CHECK
VOLTAGE AT
D961 CATHODE (50V)
D971 CATHODE (80V)
D951 CATHODE (13V)
D941 CATHODE
(6.3V)?
CHECK
IC401 (MICOM) PIN 16
5V (HIGH), IC401 PIN 18
PIN20, PIN21
CHECK
POWER INDICATOR
GREEN or FLASH ?
- 21 -
3. NO RASTER
FLASH
NO
NO
NO
TROUBLE IN
IC401 (MICOM),
TROUBLE IN
P302 SIGNAL CABLE
ROTATE SCREEN CONTROL
KNOB TO CLOCKWISE
or COUNTER CLOCKWIES
TROUBLE IN PRIMARY
CIRCUIT OF T901
TROUBLE IN
CDT SOCKET, BOARD
GREEN
YES
YES
YES
NO VIDEO
(POWER INDICATOR
GREEN or FLASH)
IC401, #18 IC401, #20 IC401, #21
14
7
5
5 14 7
Waveforms
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LG Flatron F720B Specifications

General

Brand	LG
Model	Flatron F720B
Category	Monitor
Language	English