LG FM776F Service Manual page 23

OFF MODE FAILURE
CHECK
IC401 (MICOM)
PIN 30, 31 (H/V INPUT)
SIGNAL?
YES
H/V SYNC
CHECK
IC401 PIN 13
WAVEFORM?
3V
YES
24MHz
CHECK
IC401 (MICOM)
PIN 41, 42 ?
SEE DPM TABLE
YES
CHECK
B + LINE
(6.3V,15V, 80V) ?
YES
TROUBLE IN PC
8. TROUBLE IN DPM
(NO OFF MODE.)
NO
INPUT H/V SYNC SIGNAL
NO
NO
NO
Item
Mode
NORMAL
STAND-BY
SUSPEND
OFF
- 23 -
CHECK PC,
(PC IS NOT GOING INTO
DPM OFF MODE)
TROUBLE IN
X401
(DPMF: 0V)
TROUBLE IN
IC401 (MICOM)
TROUBLE IN
Q941, Q942, Q951, Q952,
Q971, Q972
DPM TABLE
DPMS
DPMF
H
H
H
L
H
L
L
L
LED
GREEN
AMBER
AMBER
AMBER