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This is my first post and I was hoping to get a little bit of help. I have search all over and can't seem to find any information on this. I just bought a pc engine duo and the hucard side works great, but the cd side is always spinning. even if you play a hucard, the spindle will just spin. I did a complete cap kit on it and everything went well, The sound works great now, but the spindle is the same. Thanks you so much.

look for an open via near the light

 Thanks for the fast reply! I'll look around. Is this a common place that causes this?

Thesteve helped me out with this once. Found a bad via right by the two 47uf caps that are by the controller port. I bridged a large wire through it and fixed the problem.

I can't wait to get home and take a look.... 2 hours for a wheel alignment lol. Thanks so much.

Man, these systems sure had some weird issues.  And how you guys find em, and fix em...  Glad y'all have the know how is all I can day.

i didn't find anything on the top of the board, but on the bottom in the same area I have a few bad traces.

keith, would you happen to know the spot? I tinned a few spots on the bottom and ran one jumper and I'm still in the same boat.

I had to do this to another one recently. Here is a pic. Yours may not be in the same place but hopefully it is. Just to the right of the bottom 47uf cap is what fixed the issues for me.

(https://s7.postimg.cc/xwa6td5ij/CIMG8062.jpg) (http://postimage.org/)
picture share (http://postimage.org/)

thats a wire running from top to bottom?

yes, I took part of a really thick wire, put it through the hole, and then scraped off enough area to solder to on both the top and the bottom of the motherboard.

I'm looking and checking for continuity, but i just can't seem to find anything. any reason why you used a thick wire?

thick wire was overkill
if you move right from that pic to the 2 22uf caps just right of the NEC chip and check for 5V it will confirm that via

Thanks for the reply... Can you please be a little more descriptive? I'm still learning with this. I see the area with the caps...

with the unit powered on 2 22uf caps just right of the NEC microcontroller should have 5V on their + side

if I'm doing this correctly, it shows i have 5v.

disregard that last post... I'm getting 5v from the caps

you have a different issue
try unplugging the laser

I unplugged the 2 plugs to the laser and left the black plug only. It still spins.

Quote from: xinsizionx on 01/24/2015, 08:51 AMI unplugged the 2 plugs to the laser and left the black plug only. It still spins.

Your system is haunted..

Seems that way lol

The problem seems to be coming from the controller port. With a hucard I moved the port and the game turned off and would not turn back on. I had a black screen and the spindle would do little spins and the laser would move at the same pulse speed. I turned it off and put in a disc and started it up. Same thing as before. No response. I moved the port and pressed run. The access light came on and it told me to close the lid. After closing the lid it told me to set disc. The spindle is still spinning all the time. But I can short the console just by moving the port around.

Get some good solid pictures of that part of the PCB.  It could be flexing a different part of the board.

(I only know electronics in general, as an amateur, and NOT Duo repair specifically, nor am I an EE - ignore all of my advice if another user contradicts it!)

id look closely at your controller, it could have a bent pin

Thank you everyone for your help... With the help of thesteve, I ended up changing the CXA1082BQ chip, which solved the spindle problem. With a few pot adjustments i can now play an audio cd, but it skips and goes nuts at times lol. so i will have to play with the pots a bit more. This site is just amazing! this was my first time changing an IC and i can't believe i actually pulled it off lmao!

Seems to be working great now. I'm playing a full audio CD with no skipping.

Quote from: Keith Courage on 01/22/2015, 07:40 PMThesteve helped me out with this once. Found a bad via right by the two 47uf caps that are by the controller port. I bridged a large wire through it and fixed the problem.

Thanks for documenting this!  I just had the same problem with the spindle.  Still not reading discs, but hopefully it will work after I recap the system.

edit:
finished up recaping the system and its working 100% now!