LG Flatron F700P (F700PJ-ALE) Service Manual page 19

STAND-BY/SUSPEND/
DPMS OFF MODE FAILURE
CHECK
IC401 (MICOM)
PIN 40, 41 (H/V INPUT)
SIGNAL?
NO H/V SYNC SIGNAL
CHECK
IC401 PIN 9, 8
WAVEFORM?
YES
CHECK
IC401 PIN 6
(5V, HIGH)?
YES
CHECK
IC401 PIN 17, 18 ?
YES
CHECK
B + LINE
(12V, 15V, 80V,
5V) ?
TROUBLE IN
T901 or PC
5. TROUBLE IN DPM
INPUT H/V SYNC SIGNAL
NO
NO
NO
NO
Item
H / V SYNC
Mode
ON / ON
NORMAL
OFF / ON
STAND-BY
ON / OFF
SUSPEND
OFF / OFF
OFF
- 19 -
CHECK PC,
(PC IS NOT GOING INTO
DPM MODE)
TROUBLE IN
X401, IC401
TROUBLE IN
IC401
TROUBLE IN
IC401
TROUBLE IN
Q913, Q915
DPMS TABLE
VIDEO
NORMAL
OFF(0V)
OFF(0V)
OFF(0V)
LED
GREEN
AMBER
AMBER
AMBER