NEC MultiSync V520 Service Manual

4. NO VIDEO
NO VIDEO
YES
CHECK
SCREEN CONTROL
CLOCKWISE
YES
CHECK
U201 PIN 5, 8, 11
SIGNAL LEVEL
YES
CHECK
U201 PIN 18, 20, 23
SIGNAL LEVEL
TROUBLE IN U201
CLAMP(PIN 15)
U201 12V VOLTAGE
YES
CHECK
U203 PIN 1, 2, 3
SIGNAL LEVEL
CHECK
CATHODE VIDEO
LEVEL
PROBLEM IN CRT
YES
YES
TROUBLE IN U203
R220, R240, R260
NO
TROUBLE IN U203
12V, 77V VOLTAGE
NO
NO
TROUBLE IN
R/G/B SIGNAL,
SIGNAL CABLE
NO
REFER TO
“NO RASTER”
ON PAGE
NO
35

NEC MultiSync V520 Specifications

General

Brand	NEC
Model	MultiSync V520
Category	Monitor
Language	English