NEC MultiSync V520

6. TROUBLE IN H. V SYNC
TROUBLE IN
HOR. OR VER. SYNC
CHECK
CONNECTOR S702
(PIN3,4), SIGNAL
TROUBLE IN
SIGNAL CABLE
CHECK
U701(PIN 40,39)
H/V SYNC.
SIGNAL
TROUBLE IN
H/V SYNC LINE &
Q301, Q401
CHECK
U701(PIN 32,33)
H/V SYNC.
SIGNAL
CHECK
U701(PIN 5)
VOLTAGE
5V?
CHECK
U301(PIN 3)
U402(PIN 4)
CHECK
U701(PIN 8)
FREQ.4MHz
TROUBLE IN
U301, U402
TROUBLE IN
U701
TROUBLE IN U203
12V, 77V VOLTAGE
TROUBLE IN
5V LINE
YES
NO
YES
YES
YES
YES YES
YES
NO
NO NO
NONO
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