No Raster - NEC MultiSync FE700 Serviceanleitung

5. NO RASTER

NO RASTER
OK
CHECK
B+
OK
CHECK
U301 PIN 3, U402 PIN 4
H/V SYNC
OK
CHECK
U301 PIN 7, U402 PIN 23,24
H/V DRIVE
PULSE
OK
CHECK
T301 PIN 3 VOLTAGE
60V (AT H-FREQ.
31.5KHz)
OK
CHECK Q307
COLLECTOR ABOUT
1100Vp-p
OK
CHECK G1
VOLTAGE ABOUT
-10~-100V
OK
PROBLEM IN
G2 VOLTAGE
NG
NG
NG
U102,Q102,D114,D111,L106
NG
NG
NG
7- 6
POWER SUPPLY
CHECK
PROBLEM IN
MCU U701
PROBLEM IN
U301, U402
PROBLEM IN
OR DEFLECTION YOKE
PROBLEM IN
Q307, Q308,T302, D307,
D308, Q309, Q325
PROBLEM IN
Q305, Q306, ZD303
D318, T301, C344