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 Post subject: Pioneer CLD-1750 issues
PostPosted: 27 Sep 2011, 22:06 
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Well, I'll break in this new subforum with this thread, then! :)

I have a PAL/NTSC player (Pioneer CLD-1750) which I have a couple of issues with. The motor inside broke off suring shipping, but I managed to glue/screw it back in place. The issues I'm experiencing with this player now are the following:
Fast forwarding cause skips and jumps backwards/doesn't move forward. Chapter select also take a LONG time and usually end up on the wrong chapter/place. What could cause this? My guess is that the rubber band from the motor to the laser-head mechanism is worn out and slips. Normal playback is just fine.

Another thing I've noticed is that the picture have some noise in it. Some vertical "zigzag lines" on the picture if I look closely. Could this be the result of the head being a little bit out of position? If that is the case, can a unexperienced person like me recalibrate it?

I still have a Pioneer DVL-900 which I use, but would be nice to get my PAL player running at peak performance again. :)


- Frank
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 28 Sep 2011, 03:53 
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sounds like you have alot of different problems with it man, thats why i never have any heavy electronics shipped to me, i always find someone within 50 miles so i can pick it up. all i could suggest would be to replace the belts and hope for the best, maybe take a run down to the thrift store and pick up a few vcrs and chop em up for parts, get some belts and things out of them, i do that all the time
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 28 Sep 2011, 05:39 
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The Zip Zag lines are tilt and tangental angle adjustments.

I would expect that the jumping and Fast Forward is the motor not holding good contact with the movement gears or other gears are loose or missing teeth.

All this means more camage to the pickup assembly than the motor breaking loose.

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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 28 Sep 2011, 06:46 
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The gears inside seem fine. The only thing I can think of is the belt. I can hear noises that would suggest it is slipping. I'll see if I can come over a belt that is small enough. Maybe I'll try to use some sticky spray to make it hold contact better.
Unfortunately there are no thrift stores in the area that have old electronics, as no one wants it. LD were never officially released in Norway, so it's hard to come by. A poor quality player easily can be sold for $170. I couldn't find anything locally, that's why I got it shipped. The DVL-700 I have were also shipped, but packed a lot better (three boxes etc) and have no issues.

About the tilt and tangental angle adjustments. Is it easy to mess up, or can an inexperienced person like me do it with a little trail and error?

- Frank
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 28 Sep 2011, 23:08 
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samaron wrote:
The gears inside seem fine. The only thing I can think of is the belt. I can hear noises that would suggest it is slipping. I'll see if I can come over a belt that is small enough. Maybe I'll try to use some sticky spray to make it hold contact better.
Unfortunately there are no thrift stores in the area that have old electronics, as no one wants it. LD were never officially released in Norway, so it's hard to come by. A poor quality player easily can be sold for $170. I couldn't find anything locally, that's why I got it shipped. The DVL-700 I have were also shipped, but packed a lot better (three boxes etc) and have no issues.

About the tilt and tangental angle adjustments. Is it easy to mess up, or can an inexperienced person like me do it with a little trail and error?

- Frank


For the adjustments you just have to look inside and see if you see a variable pot marked TILT. If you do turn it a little and see what happens. The pickup will need to be on the inner portion of the LD. Not sure when the tangental is without seeing the pickup.

My concern is why did this happen. More than just the movement motor breaking free would happen to cause this. Is the motor that broke free the pickup movement motor or the loading motor or another? Belts do not move the pickup anymore and this looks like a player from the 1990's which means the newer designs where the movement motor is in the pickup assembly.
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 29 Sep 2011, 10:35 
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The motor that broke of were the one driving the laser head. It probably got a good smack during shipping. The player is from 1992 if I remember correct.
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 29 Sep 2011, 22:46 
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Look for the tilt adjustment pot and turn it and see what happens, then put it where the diagonal lines are lowest or not seen. If you cannot see a difference then there are further issues
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 17 Oct 2011, 08:44 
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Same player CLD-1750 and same issues it seems to be the alignment of the laser or the IR there is tiny sensor next to the laser that could be out of position by a tiny margin that has to be critically aligned otherwise chapter searching and visual searching will be all over the place. That is what I think it boils down too.
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 18 Oct 2011, 01:18 
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It IR sensor next to the laser is the sensor for the tilt. If the Tilt variable resistor can properly adjust the tilt then the IR sensor is fine. If the IR sensor is so far out the tilt VR cannot adjust to get a proper picture then you need to adjust the sensor. I have seen a pickup where the IR sensor mounting spring tab was bent up and the IR sensor would not adjust.
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 Post subject: Re: Pioneer CLD-1750 issues
PostPosted: 18 Oct 2011, 04:07 
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krbahr wrote:
It IR sensor next to the laser is the sensor for the tilt. If the Tilt variable resistor can properly adjust the tilt then the IR sensor is fine. If the IR sensor is so far out the tilt VR cannot adjust to get a proper picture then you need to adjust the sensor. I have seen a pickup where the IR sensor mounting spring tab was bent up and the IR sensor would not adjust.


Yeah that’s the story with my case and all I need is to get it spot on again. It also throws the analogue soundtrack off with ether no sound or a slight crackle noise behind the soundtrack as if I was listening to an FM radio station.

The spindle motor is still rock’n super fine where I installed a new one years ago then I started to have little search/chapter searching issues I guess when taking it apart and putting back together careful I must have overlooked something?

If I can look at model that is working I might be able to eyeball the issues and correct it or get it near then make tiny slow adjustments to getting back to playing working order.
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