AOC VGA1581, Руководство по обслуживанию

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15" CDT Color Monitor VGA1581
18
6-3 Hor./Osc/Def/Hv Circuit Fault
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 Q402 ABOUT 12.5Vpp
CHECK Q402, T401
CHECK T401, T402, Q402, Q403,
OF Q403 ABOUT 1250Vpp AT FH:31KHz
D408, C418, C419, H-DY, B+
CHECK IC101 PIN16 ABOUT 5 VDC
CHECK IC101 PIN 20 WAVE
FORM ABOUT 1Vpp
CHECK IC101 PIN20 RELATIVE CIRCUIT
CHECK IC401 PIN 39~41
6-4 Abnormal Horizontal Deflection
1.Abnormal Horizontal Size
NG
OK
CHECK THE RELATIVE CIRCUIT
CHECK THE RELATIVE
CIRCUIT OF SMPS.
CHECK FBT VOLTAGE ABOUT
OF Q404, Q405, & Q406
CHECK THE HV OF CRT
ABOUT 24KV
READJUST H-SIZE FUNCTION
80V AT FH=31KHz
2.Abnormal Horizontal Video Center
RELATIVE CIRCUIT
NG
SET H-CENTER TO CENTER
CHECK IC101 PIN39,41