Fujitsu MCM1514V, C551, D556Q, 154V HOR./OSC/DEF/HV Circuit Fault, Abnormal Horizontal Deflection

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

NO RASTER (DISCONNECT WITH SIGNAL CABLE)

CHECK IC401 PIN 29 ABOUT 11.5VDC

NG

OK

CHECK IC401 PIN 26 WAVE

FROM ABOUT 3Vpp

CHECK IC401 PIN 29 RELATIVE CIRCUIT

NG	CHECK IC401 PIN 4 ~ 7, PIN 13
OK	RELATIVE CIRCUIT

CHECK THE COLLECTOR VOLTAGE OF

Q402 ABOUT 30Vpp

FROM ABOUT 3Vpp

NG

OK

CHECK Q402,T401

RELATIVE CIRCUIT

CHECK THE COLLECTOR VOLTAGE OF

Q403 ABOUT 1250Vpp AT FH:31KHz

FROM ABOUT 3Vpp

NG

CHECK T401,T402,Q402,Q403, D408,C418,C419,H-DY,B+ FROM ABOUT 3Vpp

6-5 ABNORMAL HORIZONTAL DEFLECTION

1. ABNORMAL HORIZONTAL SIZE

READJUST H-SIZE FUNCTION

NG

OK

CHECK FBT VOLTAGE ABOUT 90V AT FH=31KHz

CHECK THE RELATIVE CIRCUIT OF Q404,Q405, & Q406

CHECK THE RELATIVE

CIRCUIT OF SMPS.

CHECK THE HV OF CRT

ABOUT 24.5KV

2. ABNORMAL HORIZONTAL RASTER CENTER

CHECK D418,D419,R457,R458,L404