Line Failure - NEC MultiSync 3D JC-1404HME Service Manual

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(2-2-2) +8 SV line FAILURE
APPLY +85V BElWEEN K2 and K4
OK
CHECK +85V
-
-
OTHER
LOAD FAILURE
tNG
Disconnect CN-X connecter
Apply +85V between K2 and K4 (using external DC POWER SUPPLY UNIT).
CHECK +85V voltage
OK
•
NG
CRT PWB FAILURE
(VIDEO CIRCUIT)
SEE ITEM (5-6)
•
D514, D515, D516, 0511, 0512, 0513
C565 FAILURE
(2-2-3) +170V line FAILURE
CHECK 0523, 0519,
D522
NG
OK
I'
I
After following check is finished, exchange 0523, 0519, D522
I
II'
Apply +24V DC between K3 and K4, NG CHECK 24V line load
CHECK +24V line voltage
-
REFER TO (2-2-1)
+oK
CHECK +12V line Voltage
NG
(TP550)
+oK
CHECK DRIVE OUTPUT OF MAIN DC/DC CONVERTER
NG
IC510, 0520, 521
(0520 EMITTER)
~
C540, T501 FAILURE
OK
..
MAIN DC/DC CONVERTER FAILURE (0519, IC509,-610, etc.)
.
-
H. DRIVE, OUTPUT CIRCUIT FAILURE (0523, 0522, etc.)
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