No Blanking; Hor./Osc/Def/Hv Circuit Fault - Philips 107E7 Service Manual

17" CDT Color Monitor

7-3. No Blanking

CHECK THE RELATIVE
CIRCUIT OF BLANKING
OK
CHECK R821 ON VIDEO PCB,
CHECK G1 RELATIVE CIRCUIT
FBT PIN 5 ON MAIN PCB

7-4. Hor./Osc/Def/Hv Circuit Fault

No Raster (Disconnect With Signal Cable)
CHECK IC101 PIN 16 ABOUT 5 VDC
OK
CHECK IC101 PIN20 WAVE FORM
ABOUT 3Vpp
OK
CHECK THE COLLECTOR VOLTAGE
OF Q402 ABOUT 14Vpp
OK
CHECK THE COLLECTOR VOLTAGE
OF Q403 ABOUT 1200Vpp AT FH: 31KHz
NG
NG
NG
NG
NG
CHECK THE RELATIVE CIRCUIT
OF FBT
CHECK IC101 PIN 5 RELATIVE CIRCUIT
CHECK IC101 PIN20
RELATIVE CIRCUIT
CHECK Q402, T401
RELATIVE CIRCUIT
CHECK T401, T402, Q402, Q403,
D408, C418, C419, H-DY, B+
31
107E7