Hor./Osc/Def/Hv Circuit Fault; Abnormal Ddc (Plug & Play); Abnormal Horizontal Deflection - Tatung VM9G5DA S995T Service Manual

NO RASTER (DISCONNECT WITH SIGNAL CABLE)
CHECK IC801 PIN 10 ABOUT 11.5V VDC
NG
OK
CHECK IC401 PIN8 Waveform ABOUT 10Vpp
OK
CHECK THE DRAIN VOLTAGE
OF Q402ABOUT 40Vpp
OK
CHECK THE COLLECTOR VOLTAGE
OF Q403 ABOUT 1100Vpp AT FH:31KHz
NG
CHECK IC101 PIN5 VOLATAGE ABOUT 5V
CHECK SIGNAL CABLE OR H802
PIN3 4 DATA OUTPUT
1. ABNORMAL HORIZONTAL WIDTH OF VIDEO
READJUST H-WIDTH FUNCTION
CHECK FBT B+ VOLTAGE
ABOUT 60.5V AT FH = 31KHz
OK
CHECK THE HV OF
CRT ABOUT 26KV

6-4 HOR./OSC/DEF/HV CIRCUIT FAULT

NG
NG
6-5 ABNORMAL DDC (PLUG & PLAY)

6-6 ABNORMAL HORIZONTAL DEFLECTION

NG
OK
NG
CHECK IC401 PIN10 RELATIVE
CIRCUIT
CHECK IC801 PIN 26 ~ 30
RELATIVE CIRCUIT
CHECK Q402, T401
RELATIVE CIRCUIT
CHECK T401, T402, Q402, Q403, D408,
C418, C419,H-DY
CHECK Q102 GOOD OR FAIL
CHECK THE RELATIVE CIRCUIT
OF Q404, Q405, & Q406
CHECK THE RELATIVE CIRCUIT OF
SMPS.Q914, Q915, Q911, Q912
IC801 PIN 3, 4, 5, 6, VR801