NEC Multisync Plus JC-1501VMA Service Manual page 47

Check V. sync
(un"'bl' pk"",
1
on the DEF PWB
Lack of linearity improvement .
PWE-173A Lack of East-West pincushion
PQintS3 Abnormal V Size
No picture
NG
Check sync circuit
on the INTERFACE PWB
OK
PWE-176
Check 2 pi n of
1C401 voltage
Normany, the 2 pin
is approx. 24V
NG
R423 Failure
OK
Check the
(Measure on the DEF PWB)
1C401 output PWE-173A
-fV(Hz)
IC401
50 56 67
75
80
I I I J
I I
----------
1
High
Low
I
I
---
3
High
Low
I
-- -
-.-
- - - - - - . - - - - -
4
High
Low
I
5
---
..
High
Low
NG
IC401 Failure
OK
Check 8 pin of
1C401
NG
IC401 Failure
OK
V F/V is OK
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