HP S7650
15
6.Trouble Shooting Chart
6-1 No Raster
1. CRT Relative Circuit Problems
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
CHECK THE HIGE VOLTAGE OF CRT
ABOUT 23~24KV
CHECK THE VOLTAGE OF CRT
HEATER ABOUT 6.3V
CHECK VOLTAGE OF THE CRT
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
47.0V,13V
CHECK FAILSAFE CKT IC401
Q909, Q910
CHECK CRT'S HEATER RELATIVE
CIRCUIT Q907, Q908
CHECK BRIGHTNESS CIRCUIT
Q705 RELATIVE CKT.
PIN 25 RELATIVE CKT.
400V TO 600V
REFER ITEM 6-2
CATHODE ABOUT 55V TO 65V
REFER ITEM S.M.P.S.
BRIGHTNESS SET TO MAX. THEN CHECK
CRT G1 VOLTAGE
Содержание S7650
Страница 16: ...HP S7650 16 2 Abnormal Video Level On Screen 3 Abnormal DDC Plug Play ...
Страница 17: ...HP S7650 17 6 2 Abnormal Display 1 No Signal On Screen ...
Страница 18: ...HP S7650 18 6 3 No Blanking 6 4 Hor Osc Def Hv Circuit Fault 1 No Raster Disconnect With Signal Cable ...
Страница 22: ...HP S7650 22 7 Mechanical Of Cabinet Front Dis Assembly ...
Страница 39: ...HP S7650 39 9 Block Diagram ...
Страница 40: ...HP S7650 40 ...
Страница 42: ...HP S7650 42 IC401 STV9118 IC803 LM2480NA ...
Страница 43: ...HP S7650 43 ...
Страница 44: ...HP S7650 44 ...
Страница 46: ...HP S7650 46 11 2 Video Board ...