Daewoo DPC-7900 Series, Serivce Manual

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Please replace with a good one.
C . Disassemble F/W, replace with a good one or re-plug it to see if the LED lights
up when Power ON.
D
. If the above actions are not working, replace the Main Board.
T03 Loading time too long
Main Board
A.
Check the flat cable to see if it is adhibited to the right place.
B. Remove the cover to see if the resistors or resistor-array adjacent to U38 and or
U17, to see if there is any cold soldering, hollow soldering, misplaced soldering,
or wrong part.
T04 Remote control bad sensing or not functional
Remote control
C. If the above actions are not working, replace the Main Board.
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.
Remove the top cover and the panel. Check to see if
IR
1 has short circuit,
broken circuit, hollow soldering, or other problems. Also check if the pins 1 of
IR
1 have power.
B. If the above actions are not working, replace the Main Board.
T05 Stay in the Run In condition after power on, can’t be tested
Main Board
A.
The same refer to T03
.
B. If the above actions are not working, replace the Main Board.
T06 System down at power on
Main Board
A.
Remove the top cover, check all flat cables in the system to see if they are
correctly
plugged to the fixed positions, or re-plug them.
B.
Check the pin 1 of U3 to see if it is low voltage. If not , disassemble R5 or pull it to
low voltage with a lead.
C. If the above actions are not working, replace the Main Board.
T07 System down during play
Main Board
A.
Exclude the condition of using batt
e
ry. (The system will down when the
voltage is too low.)
B. Disassemble U
17
F/W, replace with a good one or re-plug it to see if the
symptom will disappear.