No Blanking; Hor./Osc/Def/Hv Circuit Fault - Philips 105G7 Series Service Manual

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CHECK THE RELATIVE CIRCUIT OF
BLANKING
OK
CHECK R879 ON VIDEO PCB, CHECK
G1 RELATIVE CIRCUIT ON MAIN PCB
NO RASTER (DISCONNECT WITH SIGNAL CABLE)
CHECK IC401 PIN10 ABOUT 12V
OK
CHECK IC401 PIN8 WAVE FOR ABOUT
3Vpp
OK
CHECK THE COLLECTOR VOLTAGE
OF Q460 ABOUT 20Vpp
OK
CHECK THE COLLECTOR VOLTAGE
OF Q403 ABOUT 1200Vpp AT Fh:31KHZ
NG
CHECK
T401/T402/Q460/Q403/D408/C418/C419/
H-DY/B+ VOLTAGE
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6.3 NO BLANKING

NG

6.4 HOR./OSC/DEF/HV CIRCUIT FAULT

NG
NG
NG
CHECK THE RELATIVE CIRCUIT OF
R660/C662/D620 AND Q705/IC601
CHECK IC401 PIN10 RELATIVE
CIRCUIT
CHECK IC401 PIN26-30 ,PIN15
RELATIVE CIRCUIT
CHECK Q460/T401 RELATIVE CIRCUIT
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