Filter
Top Products
17” CDT Color Monitor 107B7
28
7.Trouble Shooting Chart
7-1 No Raster
1.CRT Relative Circuit Problems
REFER ITEM S.M.P.S.
BRIGHTNESS SET TO MAX. THEN
CHECK CRT G1 VOLTAGE
NG
NG
NG
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
OK
CHECK POWER SAVING CIRCUIT,
"ABNORMAL DISPLAY"
H-SYNC, V-SYNC SIGNAL
CHECK SCREEN VOLTAGE ABOUT
LESS THAN 300V
CHECK FBT
CHECK MAIN PCB POWER SUPPLY
CHECK IC101 PIN18 OUTPUT
Q907, Q908, Q909, Q910
CHECK CRT'S HEATER RELATIVE
CIRCUIT Q907, Q908
Q705 RELATIVE CIRCUIT
OF CRT ABOUT 21.0~ 22.8KV
400V TO 600V
REFER ITEM 6-2
56V, 14V, 80V, 7V(80V FROM FBT)
CATHODE ABOUT 56V TO 65V