09 October 2014, 21:55 | #1 |
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Amiga CD32 Restoration
Hello! This seems to be a pretty niche hobby market now, but I'm hoping I can find someone that might know more about the Amiga CD32 than I do.
My dad worked in a hobby electronics shop in the 90s. They received one of these machines as part of a demo along with a few discs. After the failed US launch, it ended up in my dad's basement. Fast forward about 20 years I was able to rescue the machine. The power supply was missing, but thankfully I was able to find a replacement online. I haven't found any original discs to test yet, but to remove the variable of an issue with playing a burned CD game, I began testing with an audio CD. The CD will be able to play the first track of the album, but moving to a specific song does nothing. My initial thoughts are either there might be an issue with the laser seeking gears. I opened it up and was able to move the laser unit manually, but I don't have a reference as to how much force is normal for it to move. Last edited by Berig; 09 October 2014 at 22:03. Reason: Added Image |
10 October 2014, 00:34 | #2 |
PSPUAE DEV
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Move the laser away from the spindle, turn it on, does the laser return to spindle, if so then that isn't the problem.
Id try cleaning the lens if its been in a basement for so long. |
10 October 2014, 12:46 | #3 |
Junior Member
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I would do all the usual things:
Clean and lightly grease all cogs and worm gears, gear sled etc. Then if things do not improve start looking into the Laser itself! I know back along you could obtain the correct Laser assembly and replace it as DIY. Also! It may be a good idea to get the motherboard re-capped. Amiga's are starting to get real old now, I personally have had to get some A1200's re-capped. Got more to do yet but time and money are in the way |
10 October 2014, 22:52 | #4 |
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Thanks for the quick feedback, I'm glad to see there's still an active community of enthusiasts to ask these kinds of questions. I was able to clean the machine up nicely, including the lens. I haven't gone so far as disassembling all of the pieces individually yet, but that might still be in the future.
This time when I loaded the album, it didn't take nearly as long to perform the initial load, and I was able to successfully skip ahead to different tracks! I wouldn't say it is working like new, but the music player seems to function correctly now. I'm going to have to see if I can find a pressed game to test. Unfortunately, I wasn't able to get any of my burned games to work yet. One copy (Pinball Fantasies) does recognize the disc has something on it, but locks up at the command line screen. I've seen people having different kinds of luck based on a specific system, burner, and CD-R, so there are a few other combinations I can exhaust before taking more difficult action. I have read about some people having better luck after replacing their lasers, and I have seen at least one site that still sells them for about €22. The idea of re-capping is new to me, but it would make sense that the older hardware could begin to cause problems. There's also an A500 in that basement that I might have to liberate as well. |
17 October 2014, 22:12 | #5 |
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Berig: concerning CD-Rs, have you tried Philips dedicated Audio blank cd's? They are known to work with picky lens not reading any non original media.
Lens replacement itself won't do! You also need to calibrate the laser using 3 screws, takes time, patience and skills. Last edited by mikele; 17 October 2014 at 22:17. |
17 October 2014, 22:46 | #6 |
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Location: Thunder Bay, Canada
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Hi,
I would suggest doing the following to fix it... http://amigax.com/2010/12/13/replaci...32-laser-unit/ do the replacement first, don't adjust the 3 screws as if you replace the laser it will screw up that one |
18 October 2014, 01:23 | #7 | |
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Quote:
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19 October 2014, 18:41 | #8 |
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Thanks for the tips, and that guide looks helpful. Shipping to the US is a bit of a pain, but at least they have the unit in stock.
I tried a few HP and Verbatim discs with some success. I'm curious now that laser positioning has been brought up. The metal plate isn't flush with the bottom of the CD tray, and I'm not sure if this is normal. Could the laser just be out of alignment? |
19 October 2014, 18:57 | #9 | |
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Location: Thunder Bay, Canada
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Quote:
the laser itself actually pops up close to the CD, the metal plate positioning looks ok |
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19 October 2014, 19:05 | #10 |
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Join Date: Aug 2001
Location: Connecticut USA
Posts: 617
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Nothing looks out of whack there. If its reading Audio CD's and not making spinning-plastic-on-plastic noises, then you are good there.
The center spindle and motor drive will automatically put the CD in the correct position. When you close the lid, there is a pieced in the lid which presses down on the CD to apply tension to ensure that there is adequate traction to the motor drive (and centers the CD as well). |
19 October 2014, 21:12 | #11 |
PSPUAE DEV
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I agree, pointless destroying a perfectly good CD32.
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23 January 2015, 05:12 | #12 | |
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Quote:
http://www.ebay.com/itm/281097826445 Last edited by Berig; 23 January 2015 at 05:13. Reason: Added Link |
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23 January 2015, 11:55 | #13 |
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it will be ok its just a newer revision of the lens assembly
Oh and recap it,you will find many opinions on this subject but logic tells you its over 2 decades old and they will leak so its a no brainer |
13 February 2015, 03:17 | #14 | |
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Quote:
The disc I had before that would open up a command prompt some of the times after 10+ minutes, pulled up the command prompt instantly. Decent start! Four or so other discs did not work. The last one that I had was a success. Unfortunately it was a PAL game, and I have an NTSC machine, but this gives me hope for trying other roms. I appreciate the support, and I'll see what images I can get running on this machine. Last edited by Berig; 13 February 2015 at 05:37. |
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13 February 2015, 20:27 | #15 |
AmigaMan
Join Date: Oct 2012
Location: Castro Urdiales/Spain
Posts: 761
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Anyone knows the correct ohms value of the pots un the cd32 len?
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13 February 2015, 21:45 | #16 |
The show must go on.
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well there is this 4 hour video about tuning the laser
[ Show youtube player ] But most of the time if you just listen to the sound the pickup makes you can get a long way. |
13 February 2015, 22:04 | #17 |
AmigaMan
Join Date: Oct 2012
Location: Castro Urdiales/Spain
Posts: 761
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I have seen the video but He use an osciloscope to measure It. I would like to use an ohmeter to calibrate the pots. I have done it before with a dreamcast and a ps3 but I can't find the rights values forma the cd32.
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