LG Flatron F720B - Page 24

CHECK
IC401 PIN 45, 46
WAVEFORM?
CHECK
IC401 PIN 10, 50 ?
CHECK B
+
LINE
(50V, 13
V, 80V, 5V) ?
CHECK
IC401 (MICOM)
PIN 52, 53 (H/V INPUT)
SIGNAL?
- 23 -
5. TROUBLE IN DPM
Stand-by/SUSPEND/
DPMS OFF MODE FAILURE
INPUT H/V SYNC SIGNAL
NO
NO
NO
TROUBLE IN
T901 or PC
CHECK PC,
(PC IS NOT GOING INTO DPM
MODE)
TROUBLE IN
X401, IC401
TROUBLE IN
IC401
TROUBLE IN
IC401
NO
TROUBLE IN
Q941, Q951
NO H/V SYNC SIGNAL
YES
YES
YES
YES
DPMS TABLE
NORMAR ON/ON NORMAL GREEN
STAND-BY OFF/ON OFF(0V) FLASH
SUSPEND ON/OFF OFF(0V) FLASH
OFF OFF/OFF OFF(0V) FLASH
H/V SYNC VIDEO LED
MODE
ITEM
3 4
C401, #45 IC401, #46
CHECK
IC401 PIN 16 (5V, HIGH)?
43
Waveforms
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