3. no blanking, 4. hor./osc/def/hv circuit fault – Philips 107B7 User Manual

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17” CDT Color Monitor 107B7

7-3. No Blanking

CHECK THE RELATIVE

CIRCUIT OF BLANKING

CHECK THE RELATIVE CIRCUIT

CHECK G1 RELATIVE CIRCUIT

CHECK R821 ON VIDEO PCB,

FBT PIN 5 ON MAIN PCB

OF FBT

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

No Raster (Disconnect With Signal Cable)

CHECK THE COLLECTOR VOLTAGE

RELATIVE CIRCUIT

CHECK Q402, T401

CHECK T401, T402, Q402, Q403,

ABOUT 3Vpp

OF Q403 ABOUT 1200Vpp AT FH: 31KHz

D408, C418, C419, H-DY, B+

CHECK IC101 PIN20 WAVE FORM

CHECK IC101 PIN20

CHECK IC101 PIN 16 ABOUT 5 VDC

CHECK IC101 PIN 5 RELATIVE CIRCUIT

OF Q402 ABOUT 14Vpp