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Duo 3 trouble shooting success
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IXSigmaXI
Newbie
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5. February 2007 @ 21:24 |
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Greetings fellow modders,
I installed my Duo 3 modchip a few days ago and I was upset with its functionality. I asked a senior member for some advice and described my problem as follows. The good news is that I was successful in fixing the problem, so I just wanted to share my experience with anyone who might be stuck in the same situation.
My problems:
My CD tray didn't retract correctly, sometimes I would have to hit the eject button 4-5 times before it would go back in.
My PS2 would not boot up backup copies of PS2 DVD games, although it would boot several of my PSX backups.
My set up:
ps2 v1 SCPH-30001, one of the first PS2s released in the USA
GH-005 010 no gap
Duo 3
RiData DVD+R media written with Nero in 16x, DVD decoder in 2.4x
Plextor DVDR PX-740A
I installed using this diagram:
http://www.psxtune.com/psx2/images/duo3/duo3_gh005_010.jpg
Afterward, I closed up my PS2, and tried to boot up FFXII from my original copy and failed. I noticed that the "Playstation 2" logo was inverted, and after it was displayed, I was given a black screen that lasted more than 30 minutes, at which point I decided that my install was incorrect.
I then tried a similar diagram:
http://www.psxtune.com/psx2/images/duo3/duo3_gh005_020.jpg
whose only difference is that the Y wire is connected.
Once I added this wire, I was able to boot up FFXII from my original disk, as well as several original and back up PSX disks. I thought that this was correct until I tried booting up some of my PS2 backups. None of them worked and I tried dozens of times, burning new backups at different speeds didn't help.
I also added the 1k resistor between pwr and gnd that supposedly helps loading time according to another thread I found in the forums.
I have lots of experience soldering and I have many tools to help me check my installation, such as a 500watt work lamp to iluminate my work area, a magnifying visor so I can see up close, a 15watt soldering iron with a precision tip, and a digital multimeter. I checked rigorously and found no connectivity problems, and no bridges. I also adjusted my laser a few times and cleaned the lens.
My analysis:
I knew that my DVD+Rs work, since my DVD backup movies that I burned at 16x with the same burner and same software worked.
I knew that the Duo was functioning, since i could boot a few of my backup PSX games.
When i started the PS2 up with the modchip in disabled mode, it was the same as normal
It is interesting to note that when I adjust the laser and try to boot up a backup PS2 game, it will spin for a long time, but never do anything when its flat on the ground. only when I stand it up does it register the media, reset itself, and attempt to boot it, but then it gives me the red screen. standing it with a tilt helps it load faster.
I checked the voltages at each of the points on my Duo 3chip...
RST, Y were 3.54V
S was 1.70V
W was 3.23V
Z was gounded (?)
All the rest were at 3.44V
My solution:
I looked closely at the diagrams I used and more importantly I looked at the other examples of different boards and bios versions. I couldn't find a guide anywhere that said where to look to find out what bios I had, but I did reason that I had a GH-005 just from the picture.
I looked at the close-ups of the bios on some of the other diagrams and I found out where the bios version was printed, obviously it was right on the bios chip itself. and I also examined the printed text on my motherboard and found where it was labeled GH-005.
So I discovered that I had a GH-005 010 no gap, and had installed my chip using the diagram for a GH-005 020 no gap. (recall that I first installed the chip correctly but determined that it was incorrect when I tested a original game). I was also suspicious of the Z wire since it was grounded.
I opened my PS2 back up, removed the Y wire, and booted up my backup if FFX-2, and huzzah! success!
Key info:
Bios version is printed on the bios chip. That's the one that you solder M,N,O,P,Q,R,S,T,U wires to in the case of a Duo 3.
Motherboard version is printed on the board in gold lettering near the ground patch.
The place where you connect the Z wire on this version PS2 is grounded (at least when the unit is turned off) This is not an accident.
I know this may seem obvious, but I searched google for a long time and couldn't find any place that just straight up told me these facts.
Good luck, modders!
-Greg
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