Roadstar DVD-5105, Service Manual

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- Remove the top cover and check if the 12 pin Cable connected to the Power Board is
correctly plugged on the right position, or you may have to plug it again for a test.
- Use a universal wattmeter or an oscillator to test for 5V between Main Board J13 Pin 3
and GND, if not, it would suggest poor Power Board.
- If the above steps do not work, remove the fixation screw from the Power Board and
replace Power Board.
T04 Time-consuming loading
1. Main Board
- Remove the top cover and check if the 40 pin Cable connecting DVD-ROM and Main
Board is correctly plugged on the right position, or you may have to plug it again.
- If none of the above steps works, it would suggest MAIN BOARD or DVD-ROM is
NG, replace it.
T05 Remote Controller in poor contact or does not work
1. Remote Controller
- If this device does not work correctly, first check if the power supply is all right, if not,
replace the battery.
2. Front Board
- Remove the top cover by removing the front panel and check for short circuit,
breakage, missing welding on U1 and check for 5V output on U1 pin 56.
- Use a universal wattmeter or an oscillator to test FRONT BOARD U4 PIN 1 and press
on the remote controller to test for any signal out put, if no out put, replace U4.
- Check if 12pin Cable connecting Main Board to Front Board is plugged correctly on
the right position or you may have to plug it again.
- If none of the above steps works, replace Front Board or Main Board.
T06 Run In after turning on, no test available
1. Main Board
- Remove the top cover and replace with new F/W.
- If none of the above steps works, replace Main Board.
T07 System breakdown after turn on
1. Main Board
- Remove the top cover and check if all Flat Cables connected to the inside of the device
is plugged correctly on the right position, or you may have to plug it again.
- Remove F/W and replace it with a new F/W or plug F/W correctly before checking if it
works correctly.
- If none of the above steps works, replace MAIN BOARD.