Daewoo DPC-8100P Service Manual - page 18
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B.
Measure pin 168 on U201 to see if the voltage is high.
C.
Measure R903 to see if the voltage is highand the negative end of D901 must
be low voltage.
D.
Disassemble F/W, replace with a good one or re-plug it to see if the LED lights
up when Power ON.
E.
If the above actions are not working, replace the Main Board.
T03Loading time too long
Main Board
A.
Remove the cover to see if the resistors or resistor-array adjacent to U201 and
U701or IC, to see if there is any cold soldering, hollow soldering, misplaced
soldering, or wrong part.
B.
If the above actions are not working, replace the Main Board.
T04Remote control bad sensing or sensing not functional
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.
Remove the top cover and the panel. Check to see if U901 has short circuit,
broken circuit, hollow soldering, or other problems. Also check if the pins 1 of
U901 have power.
B.
If the above actions are not working, replace the Main Board.
T05Stay in the Run In condition after power on, can’t be tested
Main Board
A.
Remove the top cover and replace with another U301 F/W.
B.
If the above actions are not working, replace the Main Board.
T06System 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.
Disassemble U301 F/W, replace with a good one or re-plug it to see if the
symptom will disappear.
C.
If the above actions are not working, replace the Main Board.
T07System down during play
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.
Disassemble U301 F/W, replace with a good one or re-plug it to see if the
symptom will disappear.