Roadstar DVD-5105, Service Manual

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2. Main Board
- Check U6 for damages and check if any post parts experiences cold welding, missing
welding, short circuit, interruption or missing parts, if any, correct it.
- If none of the above steps works, replace Main Board
3. Front Board
- Check U1 for damages and check if the parts behind it experience cold welding,
missing welding, short circuit, interruption or missing parts, if any, correct it
- If none of the above steps works, replace Front Board.
T62 No fast-forward or rewind
1. Main Board
- Check if the 12 pin Cable between Front Board and Main Board is correctly plugged
on the right position, if not, correct it.
- Check U6 for damages and check the parts behind it for cold welding, missing welding,
short circuit, interruption or missing parts, if any, correct it.
- If none of the above steps works, it would suggest that Main Board or F/W is NG,
replace Main Board or update firmware.
2. Front Board
- Check U2 for damages and check if the parts behind it experience cold welding,
missing welding, short circuit, interruption or missing parts, if any, correct it
- If none of the above steps works, replace Front Board.
T63 Panel buttons does not work
1. Main Board
- Check U6 for damages and check the parts behind it for cold welding, missing welding,
short circuit, interruption or missing parts, if any, correct it.
- If none of the above steps works, replace Main Board.
2. Front Board
- Check if the 12 pin Cable between Front Board and Main Board is correctly plugged
on the right position, if not, correct it.
- Check U1 for damages and check if the parts behind it experience cold welding,
missing welding, short circuit, interruption or missing parts, if any, correct it
- Check if the “NEXT” button between base slice and Front Board experiences short
circuit, if so, correct it.
- If none of the above steps works, replace Front Board.
T71 Unsuccessful entry to system setting
1. Main Board
- Check U9 and U8 parts for missing welding, cold welding and reverse IC welding or