Thanks!
I guess you mean this item:
27 4102-9026-0 Rubber Belt
That is the belt around the loading pulley.
(page 29 from the NAD C521bee service manual)
Troubleshooting CD Players
- Thread starter dr*audio
- Start date
I guess you mean this item:
27 4102-9026-0 Rubber Belt
That is the belt around the loading pulley.
(page 29 from the NAD C521bee service manual)
dr*audio
Fish fingers and custard!
Right. What you need to do is remove the belt and measure it. Gently stretch it between the points of 2 pens, next to a ruler. Stretch it just enough to take out the slack. Write the measurement down. Multiply by 2 to get the circumference. Now measure the thickness. Now go to www.vintage-electronics.net and find a square belt that is a little smaller in circumference. They are cheap so get a couple different sizes to try.
Pio1980
AK Member
I don't recall if acrylic monomer works as a welder for nylon as well as it does for most stressed thermoplastic repairs, I think I've used it with success. I've used A.C. to bond most repaired plastics to prepared metal, but the shear strength of AC is indeed comparatively poor.
I'm not aware of or have used anything that works for Acytal/Delrin, stuff is like hard Teflon and immune to any bonding agents I've tried.
Ymmv.
sachu888
Spare the tigers, kill me
Hi @dr*audio I have bought a Philips CD 472 CD player. The transport broken in shipping. Transport is Philips CDM 4/11 transport
I have glued the transport and it seems to be ok. The player isn't playing any CD. It shows Error on display. I have observed the laser and I think it doesn't return to home position. I have made two small videos. Please have a look
Broken transport
Glued
Here are two videos
Can you tell me which micro switch to clean. One more thing, I can't see any light on laser.
Regards
Sachin
I have glued the transport and it seems to be ok. The player isn't playing any CD. It shows Error on display. I have observed the laser and I think it doesn't return to home position. I have made two small videos. Please have a look
Broken transport
Glued
Here are two videos
Regards
Sachin
Last edited:
dr*audio
Fish fingers and custard!
The laser is returning to the home position. The home position is the center of the disc.
Get the service manual, put the unit in Service Mode (the manual tells you how) and do the diagnostics.
If you disconnected the flat flexible cable to work on the mechanism, and you didn't wear an antistatic wrist strap and put a shorting clip on the end of the cable, you probably blew up the laser. The Philips laser is very easily damaged by static electricity. The new ones came with a shorting clip on the end of the cable. You can use a paper clip. You can't get a replacement laser or mechanism for this player, so you probably have a boat anchor now.
Get the service manual, put the unit in Service Mode (the manual tells you how) and do the diagnostics.
If you disconnected the flat flexible cable to work on the mechanism, and you didn't wear an antistatic wrist strap and put a shorting clip on the end of the cable, you probably blew up the laser. The Philips laser is very easily damaged by static electricity. The new ones came with a shorting clip on the end of the cable. You can use a paper clip. You can't get a replacement laser or mechanism for this player, so you probably have a boat anchor now.
Hi @dr*audio I have bought a Philips CD 472 CD player. The transport broken in shipping. Transport is Philips CDM 4/11 transport
I have glued the transport and it seems to be ok. The player isn't playing any CD. It shows Error on display. I have observed the laser and I think it doesn't return to home position. I have made two small videos. Please have a look
Broken transport
Glued
Here are two videos
Can you tell me which micro witch to clean. One more thing, I can't see any light on laser.
Regards
Sachin
A Bose Wave CD:
It try's to spin, Laser is working and it try's to lock.
I tweaked up the trimmer on the transport drive a smidge and got it to spin but no sound. I then could see I was near the end of the 2K trimmer.
I guess I'm looking for conformation the laser is bad.
Edit:
I see it's a Sanyo SF-P100 laser assembly.
It try's to spin, Laser is working and it try's to lock.
I tweaked up the trimmer on the transport drive a smidge and got it to spin but no sound. I then could see I was near the end of the 2K trimmer.
I guess I'm looking for conformation the laser is bad.
Edit:
I see it's a Sanyo SF-P100 laser assembly.
Last edited:
dr*audio
Fish fingers and custard!
Get the service manual and check the RF signal. It should be 1.25V - 1.5V peak to peak. If it's 1V or less, the laser is bad. Bose did not supply replacement lasers for these, they sold the entire mechanism. You could check and see if they are still available, but I doubt it.
dr*audio
Fish fingers and custard!
Many players use a Sony KSS-210A, KSS-213, or KSS-240. You can buy replacement lasers for them from Liberty Electronics on E-bay. They have found a supplier in China that makes good replacements.
The birds eye was messed up with no adjustment that would make it better, so I went ahead and ordered a optical pickup from an outfit in China that claims good refurbished assemblies.
It works perfectly. Good birds eye pattern right out of the box.
I did have a dim display but didn't think about it until the final closeup when the display failed light. No power to the display and those ribbon cables were my first suspect but it ended up being cold solder on the header connections.
Pretty happy with the repair on the Wave radio/CD player. I got $60 total in it - including the purchase (It did come with the remote). The optical set me back but it's not in the landfill (Yet).
Doc, Thanks for this sticky. You rock!
As Taryl would say, "Now's there's your dinner!"
It works perfectly. Good birds eye pattern right out of the box.
I did have a dim display but didn't think about it until the final closeup when the display failed light. No power to the display and those ribbon cables were my first suspect but it ended up being cold solder on the header connections.
Pretty happy with the repair on the Wave radio/CD player. I got $60 total in it - including the purchase (It did come with the remote). The optical set me back but it's not in the landfill (Yet).
Doc, Thanks for this sticky. You rock!
As Taryl would say, "Now's there's your dinner!"
dr*audio
Fish fingers and custard!
Please share the source for the laser you bought.
The birds eye was messed up with no adjustment that would make it better, so I went ahead and ordered a optical pickup from an outfit in China that claims good refurbished assemblies.
It works perfectly. Good birds eye pattern right out of the box.
I did have a dim display but didn't think about it until the final closeup when the display failed light. No power to the display and those ribbon cables were my first suspect but it ended up being cold solder on the header connections.
Pretty happy with the repair on the Wave radio/CD player. I got $60 total in it - including the purchase (It did come with the remote). The optical set me back but it's not in the landfill (Yet).
Doc, Thanks for this sticky. You rock!
As Taryl would say, "Now's there's your dinner!"
View attachment 2015056
The eBay listing.
These Sanyo optical assembly's come in two different pin layouts so be aware of your application.
I needed the 13 pin for the Bose Wave/CD.
These Sanyo optical assembly's come in two different pin layouts so be aware of your application.
I needed the 13 pin for the Bose Wave/CD.
Thanks; the belt was fixed and the player plays again.
zorandimit
New Member
Hi
Few days ago I have bought a second hand CD players, two of them:
1. Teac PD-H500i with laser pickup KSS-210A. It behaves strange (at least for me). When i close the lid, it tries to read the disk but it can't (no disk). If I raise the front of back side of CD few cm's and repeat the procedure, then it succeeds. After that it plays the disk and after some time running (I suppose the laser pickup raises the temperature) it can detect that there is a disk without rising the player's front or back side and plays it without problem. I don't know what can be the reason for such behavior and why rising or lowering front side makes player detects the CD. I don't know if somebody was trying to repair this before me. Do you have any idea?
2. Teac PD-H500c with laser pickup KSS-213C. This player detects CDs without problem, but there are glitches and skipping while playing the disks. It looks to me that it is something connected with the mechanism but I am not sure what. So I would ask you for an advice fort his unit too
Thanks
Few days ago I have bought a second hand CD players, two of them:
1. Teac PD-H500i with laser pickup KSS-210A. It behaves strange (at least for me). When i close the lid, it tries to read the disk but it can't (no disk). If I raise the front of back side of CD few cm's and repeat the procedure, then it succeeds. After that it plays the disk and after some time running (I suppose the laser pickup raises the temperature) it can detect that there is a disk without rising the player's front or back side and plays it without problem. I don't know what can be the reason for such behavior and why rising or lowering front side makes player detects the CD. I don't know if somebody was trying to repair this before me. Do you have any idea?
2. Teac PD-H500c with laser pickup KSS-213C. This player detects CDs without problem, but there are glitches and skipping while playing the disks. It looks to me that it is something connected with the mechanism but I am not sure what. So I would ask you for an advice fort his unit too
Thanks
dr*audio
Fish fingers and custard!
1. Are you raising the back of the unit or the CD itself?
2. The answers are all in this thread. Cleaning and lubrication the posts that the laser slides on. Oiling the disc motor bearing.
2. The answers are all in this thread. Cleaning and lubrication the posts that the laser slides on. Oiling the disc motor bearing.
zorandimit
New Member
1. I am rising the whole unit (front end, back end, side - the result is the same). I did that by chance trying everything to make it start and found that it is detecting CDs that way. I don't know what could be the reason for this, maybe you can find some logical explanation?
2. Cleaned everything, oiled motors, it is still skipping. I have read the thread (not everything but I will now). I saw that in cases like mine there is something wrong with the mechanism that moves the laser pickup and that the pickup is probably Ok. Am i right?
2. Cleaned everything, oiled motors, it is still skipping. I have read the thread (not everything but I will now). I saw that in cases like mine there is something wrong with the mechanism that moves the laser pickup and that the pickup is probably Ok. Am i right?
dr*audio
Fish fingers and custard!
If you cleaned and oiled the posts that the laser slides on, then it is likely that the suspension of the mechanism is sagging and the chuck is scraping on the support arm. Load a CD and look at the mechanism carefully. The chuck that holds the CD must float in the hole in the support arm and not scrape on the arm. If it's riding low and scraping, you wil hear a tick, tick ,tick as the CD spins. If this is happening, you have to take the mechanism out, and look at the suspension. I bet they used rubber bellows instead of real springs. Is so, you will have to put washers between the mechanism and the bellows to shim it up. Or you can try searching for CD suspension bushings or something like that.
zorandimit
New Member
Update
1. Teac PD-H500i with laser pickup KSS-210A. It behaves strange (at least for me). When i close the lid, it tries to read the disk but it can't (no disk). If I raise the front of back side of CD few cm's and repeat the procedure, then it succeeds. - I believe it is something wrong with the laser pickup because after first success, it works good after that. I have ordered new pickup KSS-210A, and will inform what happened after its replacement
2. Teac PD-H500c with laser pickup KSS-213C. This player detects CDs without problem, but there are glitches and skipping while playing the disks. It looks to me that it is something connected with the mechanism but I am not sure what. - I have tried everything you told me, cleaned all, oiled it, checked the gears, even opened the mabuchi motors and polished the collectors and cleaned brushes, nothing changed. The suspension is good, CD is not touching anything. At the end I believe the problem i have is wobbling of the disk and the mechanism. It is not much but it exists and this pickup cannot handle with it (possible it is also weakened). I have ordered the whole mechanism KSM-213CCM. I will replace it and see if it will solve the problem and inform you.
Thank you for your help, you are a real treasure for desperate Hi-fi enthusiasts
Zoran
1. Teac PD-H500i with laser pickup KSS-210A. It behaves strange (at least for me). When i close the lid, it tries to read the disk but it can't (no disk). If I raise the front of back side of CD few cm's and repeat the procedure, then it succeeds. - I believe it is something wrong with the laser pickup because after first success, it works good after that. I have ordered new pickup KSS-210A, and will inform what happened after its replacement
2. Teac PD-H500c with laser pickup KSS-213C. This player detects CDs without problem, but there are glitches and skipping while playing the disks. It looks to me that it is something connected with the mechanism but I am not sure what. - I have tried everything you told me, cleaned all, oiled it, checked the gears, even opened the mabuchi motors and polished the collectors and cleaned brushes, nothing changed. The suspension is good, CD is not touching anything. At the end I believe the problem i have is wobbling of the disk and the mechanism. It is not much but it exists and this pickup cannot handle with it (possible it is also weakened). I have ordered the whole mechanism KSM-213CCM. I will replace it and see if it will solve the problem and inform you.
Thank you for your help, you are a real treasure for desperate Hi-fi enthusiasts
Zoran
classyharlan
Active Member
I have a situation very similar to zorandimit's experience #1: My Teac AD-600 plays perfectly, but only when one side of the unit is raised to 30 - 45 degrees, around 10 cm or more. When at a smaller angle or set flat, it exhibits various symptoms from barely reading the disc to skipping intermittently to spinning on track search, etc.
Presumably this is a mechanical issue (as opposed to faulty electronics) though I can't imagine what inside could be adjusted to compensate for it. Thanks to Doctor Audio or anyone else in advance for any suggestions.
Presumably this is a mechanical issue (as opposed to faulty electronics) though I can't imagine what inside could be adjusted to compensate for it. Thanks to Doctor Audio or anyone else in advance for any suggestions.
dr*audio
Fish fingers and custard!
Clean and lubricate. Check that the chuck isn't rubbing.