Tatung VM5ERDA, Руководство по обслуживанию

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6-2 ABNORMAL DISPLAY
1.NO SIGNAL ON SCREEN
CHECK FBT RELATIVE CIRCUIT
LESS THAN 400V
EXCEED 600V
OK
NG
NG
OK
OK
NG
OK
NG
CHECK THE OUTPUT VOLTAGE
CHECK THE B+ VOLTAGE OF
CHECK THE VOLTAGE OF CRT
CATHODE ABOUT 40Vpp
CHECK THE VOLTAGE OF FBT SCREEN
ABOUT 400 TO 600V
CHECK THE RELATIVE CIRCUIT
CHECK THE 12V PIN
OF SMPS ON MAIN PCB
RELATIVE CIRCUIT
OF P802 CONNECTOR
OF IC801 PIN 13, 15, 18 ABOUT 3Vpp
CHECK THE 80V RELATIVE CIRCUIT
CHECK VIDEO IC VCC ABOUT 8V
VIDEO PCB ABOUT 75V
CHECK THE IC802
OF IC801
CHECK CRT RELATIVE CIRCUIT
OR REFER ITEM 6-1