NEC MultiSync LCD1550V - Abnormal Auto Adjustment

6-10
6. Abnormal Auto adjustment
NG
OK
OK
Check the input of pulse from U3 pin 49 ~ 61, 67 ~75.
Check the output of pulse from U6 pin 3, 4, U7 pin 3, 4, 7, 8, 13, 14, 17, 18.
NG
Check the output of
pulse from U3 pin
49 ~ 61, 67 ~75
Failure point
1) Printed wire broke between U6 pin 2, 5 and U8 pin 2, 30.
2) Printed wire broke between U7 pin 2, 5, 6, 9, 12, 15, 16, 19 and
U8 pin 13~15, 17 ~ 21.
Proceed section 9 “Checking the resolution change IC movement”.
Failure point
(1) Printed wire broke between
U6 pin 3,4 and U3 pin 49,
50.
(2) Printed wire broke
between U7 pin 3, 4, 7, 8,
13, 14, 17, 18 and U3 pin
51 ~ 58, 67 ~ 75.
OK
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