Service manual

24
TROUBLESHOOTING HINTS
6-1. Dynamic Focus
Focus is poor
Is the
waveform of the
DF pin in FBT
correct?
ORION : 300V 120V
SAMSUNG : 300V 120V
1. Check the CRT socket
or connector wire.
2. Trouble in FBT or CRT.
* Check after adjusting the static focus
finely by VR in FBT
DF
waveform
FVH
FVH FVV
FVV
No
Yes
Is the
waveform of
the pin 32 in IC501
correct?
Yes
Trouble in Q901,T902,R903
Trouble in IC501 or C407 .
No