Daewoo DPC-7900 Series, Serivce Manual

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B. Check
U19,U15 and J4,CON3
to see if there is any cold or hollow
soldering
and rule out the problem.
C. If the above action does not work after the inspection, replace the main board.
T42 Earphone Audio right no waveform (sound) or waveform (sound ) abnormal
Main Board
A.
Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering
and rule out the problem. Especially check for C24,C26,C28.
B. If the above action does not work after the inspection, replace the main board.
T43 Earphone Audio left no waveform (sound) or waveform (sound) abnormal
Main Board
A.
Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering
and rule out the problem. Especially check for C27,C36,C67.
B. If the above action does not work after the inspection, replace the main board.
T51 Video can’t be still or stopped
Remote control
A.
If the main body of the system works normally, then making sure that the
battery of the Remote control has sufficient power, if it is not, replace the
battery.
Main Board
A.
Check to see if U17 is damaged, and check all parts following U17 to see
if there is any cold or hollow soldering, short circuit, broken circuit, broken
parts, parts missing and rule out the problem.
B. Check to see whether U
17
is damaged.
C. If the above actions are not working, replace the Main Board.
T52 Can’t execute fast forward or rewind
Main Board
A. Check to see if U17 is damaged, and check all parts following U17 to see
if there is any cold or hollow soldering, short circuit, broken circuit, broken
parts, parts missing and rule out the problem.
B. Check to see whether U
17
is damaged.
C. If the above actions do not work after the inspection, it means the main board or
F/W is bad. Replace the main board or re-burn the F/W (U
1 1).
T53 Panel button
Main Board
A.
Check U17 and 11-pin plug in jack CON2 to see if there is any cold or hollow
soldering and reverse soldering of IC or parts missing.
B. If the above actions do not work after the inspection, check the 11pin cable to see if there is any damage.
C
. If the above actions are not working,
Replace the control board or the main board.
T61 Can’t enter the system setting