FSC B19-2
Page 38 of 55
No backlight
Check C201 (+) =12V
Check F201
Check D201/Q209/Q210
Check ON/OFF signal
Check Interface board
Check U201 pin9=12V voltage
Change Q201 or Q202
Check the pin7/10 of U201 if have waveforms
Short Q203/Q204 if the picture normal
Change U201
Connect PIN15 of U201 to the ground and check Q209/Q210/ Q211/Q212 collector waveforms
Check feedback circuit
Change Q209/Q210/PT201
Change Q211/Q212/PT202
Check connecter & lamp
OK
OK
OK
OK
NG
NG
NG
NG
NG
OK
NG
NG
Summary of Contents for B19-2
Page 8: ...FSC B19 2 Page 8 of 55...
Page 9: ...FSC B19 2 Page 9 of 55...
Page 10: ...FSC B19 2 Page 10 of 55...
Page 15: ...FSC B19 2 Page 15 of 55 4 4 3 OPTICAL CHARACTERISTICS 4 4 4 Backlight unit...
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Page 17: ...FSC B19 2 Page 17 of 55 5 BLOCK DIAGRAM 5 1 Monitor Exploded View...
Page 31: ...FSC B19 2 Page 31 of 55 7 PCB LAYOUT 7 1 MAIN BOARD...
Page 32: ...FSC B19 2 Page 32 of 55 7 2 Key board 7 3 INVERTER Board...