Dell E773c Series Service Manual page 17

6-3 NO BLANKING
CHECK THE RELATIVE
CIRCUIT OF BLANKING
OK
CHECK R879,D706,D863,C873 ON VIDEO
PCB,CHECK G1 RELATIVE CIRCUIT
FBT PIN 4 ON MAIN PCB
6-4 HOR./OSC/DEF/HV CIRCUIT FAULT
1. NO RASTER (DISCONNECT WITH SIGNAL CABLE)
CHECK IC401 PIN 29 ABOUT 12 VDC
CHECK IC401 PIN 26 WAVE FORM
ABOUT 10Vpp
CHECK THE COLLECTOR VOLTAGE
OF Q402 ABOUT 20Vpp
CHECK THE COLLECTOR VOLTAGE
OF Q403 ABOUT 1200Vpp AT FH:31KHz
NG
NG
OK
NG
OK
NG
OK
NG
CHECK THE RELATIVE CIRCUIT
OF Q705
CHECK IC401 PIN 29 RELATIVE
CIRCUIT
CHECK IC401 PIN 4~6, PIN 13
RELATIVE CIRCUIT
CHECK Q402, T401
RELATIVE CIRCUIT
CHECK T401, T402, Q402, Q403, D408,
C418, C419, H-DY, B+,Q406,C401,D406
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