Eastern Digital Co V700P, Service Manual

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15
6-3 NO BLANKING
NG
OK
CHECK THE RELATIVE
CIRCUIT OF BLANKING
CHECK G1 RELATIVE CIRCUIT
P803 PIN4 ON VIDEO PCB
CHECK THE RELATIVE CIRCUIT
OF Q623,Q624,Q625 ON MAIN PCB
CHECK C825, R845 ON VIDEO PCB,
6-4 HOR./OSC/DEF/HV CIRCUIT FAULT
1. NO RASTER (DISCONNECT WITH SIGNAL CABLE)
NG
OK
OK
OK
NG
NG
NG
CHECK THE COLLECTOR VOLTAGE
CHECK THE COLLECTOR VOLTAGE
RELATIVE CIRCUIT
RELATIVE CIRCUIT
OF Q603 ABOUT 60Vpp
CHECK Q603, T601
CHECK T601, T602, Q604 Q603,
CHECK IC601 PIN 29 RELATIVE CIRCUIT
OF Q604 ABOUT 1250Vpp AT FH:31KHz
D605, C618, C619, H-DY, DDB+
CHECK IC601 PIN 4 ~ 7, PIN 13
CHECK IC601 PIN 29 ABOUT 11.5 VDC
CHECK IC601 PIN 26 WAVE
FORM ABOUT 11.5Vpp