Tatung VM5ERDA, Руководство по обслуживанию

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6.TROUBLE SHOOTING CHART
6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS
BRIGHTNESS SET TO MAX.
THEN CHECK CRT G1 VOLTAGE
NG
NG
NG
LESS THAN 300V
NG
NG
OK
OK
OK
OK
OK
CHECK THE HIGE VOLTAGE
CHECK THE VOLTAGE OF CRT
HEATER ABOUT 6.3V
CHECK VOLTAGE OF THE CRT
CHECK BRIGHTNESS CIRCUIT
CHECK POWER SAVING CIRCUIT,
"ABNORMAL DISPLAY"
CHECK FBT. D706, R723, C713
Q703, Q704, Q705 RELATIVE CKT.
REFER ITEM 6-2
CATHODE ABOUT 60V TO 70V
CHECK MAIN PC BOARD
CHECK SCREEN VOLTAGE ABOUT
400V TO 600V
OF CRT ABOUT 23.5KV ~ 25KV
Q909, Q910
RELATIVE CIRCUIT Q907, Q908
CHECK CRT'S HEATER
88V, 12V
CHECK FAILSAFE CKT Q402, Q403
RELATIVE CKT.