LG Flatron 775FT - Troubleshooting Common Issues

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8. TROUBLE IN DPM
CHECK
IC401 (MICOM)
PIN 31, 32 (H/V INPUT)
SIGNAL?
CHECK
IC401 PIN 13
WAVEFORM?
CHECK
IC401 (MICOM)
PIN 2, 3 ?
CHECK
B
+
LINE
(6.3V,15V, 80V) ?
CHECK PC,
(PC IS NOT GOING INTO
DPM OFF MODE)
TROUBLE IN
X401
TROUBLE IN
IC401 (MICOM)
TROUBLE IN
Q941, Q942, Q951, Q952,
TROUBLE IN PC
OFF MODE FAILURE
INPUT H/V SYNC SIGNAL
H/V SYNC
(NO OFF MODE.)
NO
NO
NO
NO (DPMF: 0V)
DPM TABLE
Mode
Item
NORMAL
STAND-BY
SUSPEND
OFF
DPMF
H
H
H
L
LED
GREEN
AMBER
AMBER
AMBER
DPMS
H
L
L
L
YES
YES
SEE DPM TABLE
YES
YES
5V
24MHz