Vertical - NEC MultiSync 3D JC-1404HME Service Manual

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(3-2) VERTICAL
NG
CHECK +5V, +12V
:1-------1-~
+5V, +12V REG. FAILURE
REFER TO ITEM (2-2-1)
OK
CHECK V. SYNC
(TTL NEGATIVE PULSE)
MEASURE THE DC VOLTAGE OF CN-M 4
pin
ON THE SUB UNIT. "ABOUT 4.BVDC"
NG
CHECK INPUT V.SYNC
I
OK SUB UNIT
FAILURE
TTL
TTL COMPOSITE SYNC
ANALOG
ANALOG COMPOSITE SYNC
SYNC ONG
NG SIGNAL CABLE FAILURE
,___---+-1
SIGNAL GENERATOR FAILURE
V. TRIGGER CIRCUIT FAILURE (IC501, etc)
CN-A
pin
9
CN-A pin 11
CN-A
pin
13
CN-A pin 12
CN-A
pin
4
OK DIGITAL CONTROL CIRCUIT FAILURE (REFER TO ITEM (4-1))
--♦ V. OSC FAILURE (IC401, etc.)
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