No Operation, Power Led Flash - NEC MultiSync FE700 Serviceanleitung

1. NO OPERATION, POWER LED FLASH

POWER LED FLASH
CHECK Q307, Q102,
D110,D111,D112,D113
POWER SW
TURN OFF
OK
CHECK
U102
CHECK U102
PIN6 OUTPUT
U102 pin6
OK
POWER SW
TURN ON
DC POWER SUPPLY OUTPUT VOLTAGE SET AT 17V,
CURRENT SET AT 600mA. POSITIVE CONNECT TO
C130 "+" SIDE. NEGATIVE CONNECT TO U105-pin 5.
CHECK U102
PIN 4(SAWTOOTH)
AND PIN 8(5V)
NG
OK
FAILURE
R136, ZD103
7- 2
U102 pin4
FAILURE
U102
NG