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I have read that if you use a ohm meter and dont go to far that it is safe. Here is the tutorial I got.
Phillips Pot Tweak (v0.1)
Tutorial written by : xcept and sez
Last edited: August 6, 2003
Note : This tweak can damage your DVD-drive,
proceed at own risk!!!
We also came across some media read problems
after modding a green 1.2 xbox. By browsing the
internet we noticed that others had tweaked the
DVD-drive by adjusting the Pot meter inside. We
decided to do the Pot tweak as well in order to
get the machine going.
However by searching xbox-scene we did not find
accurate values to adjust the Pot meter. The
guide Moe had written helped us a lot (thnx
Moe), but the only thing that bothered us was
that there were no Ohm values in it. So we
thought is was time to write another manual to
explain what we experienced during the Pot tweak
on a Phillips DVD-drive.
Specifications:
? Limited Edition XBOX V1.2;
? Phillips DVD-drive (s-86km/s6km), exactly the
same laser unit as picture in Moe?s tutorial;
? Burned/Utilized media: Nashua DVD-R, Princo
DVD-R.
Requirements:
? Basic knowledge of electronics;
? Multi meter;
? Confidence?..
So we took out the drive and disassembled it
according to Moe?s tutorial in order to find the
Pot meter. This is how we tweaked the Pot meter:
1. Locate the first Pot meter next to the cable
connector;
2. Put a mark on that Pot meter with a resistant
marker;
3. Measure the value of the resistance (we
measured r=644?);
a. A Pot meter is a variable resistor and thus
measure between the wiper (screw) and the second
resistor (second point seen from the cable
connector). To be sure the measurement is
correct we included the following picture:
4. Turn the Pot gently with a small screw driver
clockwise;
5. We adjusted it to r= 536?;
6. We reassembled the drive and tested it with
the DVDs we burned. The result was fascinating.
Before it did not recognized the burned media at
all but now the machine swallowed the media much
better. However, some burned DVDs still did not
play so we decided to tweak the potentiometer a
bit more.
7. So we took the DVD-drive apart and adjusted
the value to 498? (this was the closest we could
get to 500?). Tested the drive once more. Damn,
that?s a good feeling, every media we gave it
worked flawlessly!!
So you see the Pot tweak can be done without
screwing up your DVD-drive. Just take the time
to measure the right Ohms and take one small
step at a time. Thus if the requirements,
mentioned above, fit you and you have a multi
meter and your Phillips DVD-drive is bugging you
we suggest to go for the Pot tweak as well.
Tutorial written by : xcept and sez
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