Daewoo DPC-7900 Series, Руководство по обслуживанию

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- 3
4
-
A.
Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B.
Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C. Check the devices surrounding
U
1 and
U201
to see if there is any cold or
hollow
soldering and reverse soldering of IC or parts missing.
D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
E. If the above actions are not working, replace the Driver Board.
T73 TFT image shakes or is distorted
Main Board
A.
Check the 1 1 -pin cable connected to the driver board to see if there is any
problem of plugging. Rule out the problem.
B. Check devices after Y/C signal to see if there is any cold or hollow soldering
and reverse soldering of IC or parts missing.
C. Check U
17
to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
D. If the above actions are not working, replace the Main Board.
Driver Board
A.
Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C. Check the devices surrounding
U1
and
U201
to see if there is any cold or
hollow
soldering and reverse soldering of IC or parts missing.
D. Check
Y1,Y2
to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
E. If the above actions are not working, replace the Driver Board.
T74 TFT PAL color strip
Driver Board
A.
Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are
correct.
B.
Check VC1 to see if there is any cold or hollow soldering and reverse soldering
of IC or parts missing.
C.
Check the devices surrounding U1 and U201 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering