Fujitsu D556Q, MCM1514V, C551, 154V manual Abnormal Display, No Blanking, No Signal on Screen

6-2 ABNORMAL DISPLAY

NO SIGNAL ON SCREEN

CHECK VIDEO IC VCC ABOUT 8V

NG

OK

CHECK THE OUTPUT VOLTAGE OF IC801 PIN 13,15,18 ABOUT 3Vpp

NG

OK

CHECK THE 12V PIN

OF P802 CONNECTOR

CHECK THE RELATIVE CIRCUIT OF Q813,Q814 & IC801

CHECK THE B+ VOLTAGE OF VIDEO PCB ABOUT 75V

NG

OK

CHECK THE VOLTAGE OF CRT CATHODE ABOUT 40Vpp

CHECK THE 80V RELATIVE CIRCUIT OF SMPS ON MAIN PCB OF Q813,Q814 & IC801

NG

OK

CHECK THE VOLTAGE OF FBT

SCREEN ABOUT 400 TO 600V

LESS THAN 400V

EXCEED 600V

CHECK THE IC802

RELATIVE CIRCUIT

CHECK FBT RELATIVE CIRCUIT

CHECK CRT RELATIVE CIRCUIT OR REFER ITEM 7-1

6-3 NO BLANKING

CHECK THE RELATIVE

CIRCUIT OF BLANKING

NG

OK

CHECK C836,R859 ON VIDEO PCB,

CHECK G1 RELATIVE CIRCUIT

CHECK THE RELATIVE CIRCUIT OF Q601 & Q707 ON MAIN PCB