Trouble In H.v Sync - NEC MultiSync FE700 Serviceanleitung

6. TROUBLE IN H. V SYNC
PROBLEM IN
HOR. OR VER. SYNC
YES
CHECK
CONNECTOR S702
(PIN3,2), SIGNAL
YES
CHECK
U701(PIN 39,40)
H/V SYNC.
SIGNAL
YES
CHECK
U701(PIN 32,33)
H/V SYNC.
SIGNAL
YES
CHECK
U301(PIN 3)
U402(PIN 4)
YES
PROBLEM IN
U301, U402
NO
NO
CHECK
U701(PIN 5)
NO
VOLTAGE
5V?
YES
CHECK
U701(PIN 8)
NO
FREQ.12MHz
YES
PROBLEM IN
U701
7- 7
PROBLEM IN
SIGNAL CABLE
PROBLEM IN
H/V SYNC LINE &
Q301, Q401
NO
NO
PROBLEM IN
5V LINE
PROBLEM IN U203
12V, 77V VOLTAGE