Need Diagnosis Help: Shanling Tube CD-S100se

Mayank

Mayank

Well-Known Member
This unit looks really well made - with all components neatly marked on the PCB mask. It has "audio grade" capacitors and Burr Brown op amps in removable sockets. I had bought it in a "non-working" condition after reading several reviews about its superior build quality and various upgrade potential.

Need help diagnosing the issue:

o Powers on
o The display keeps showing "Loading"
o CD motor does not spin
o The CD head doesn't move
o I do not find the laser being turned on
o None of the buttons work (FF/Rew/Stop/Play or Eject)
o The tube filament lights up

I haven't been able to find a service manual or the schematic anywhere on the web.

Any advice on how I should proceed diagnosing the problem :rolleyes: ?

Rgds,
Mayank
 
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Welcome to my world, basically same thing that happened with my Jolida. Had to install a new mechanism with laser. I recommend you take it to someone that can service CD's.

Your CDP uses a Philips CDM12.1 laser mechanism. Very common, as it is used by Jolida, Marantz, Nad, and many other. You find them on EBay for around $20.00 each. But, prior to purchase, give to a tech that can check for connections and/or bad cable; he can advise what it is, and armed with the fact that the mechanism is only $20.00 +/-, this should be a $50.00 to $75.00 repair, dependind on his labor rate.
 
Hi PR Audio:

Thanks for your response.

I would really like to try and repair the CD player myself (of course, along with help from the yodas in the forum!). Learning and understanding the logic of fault finding is what got me into this hobby in the first place :D

I have removed the CD mechanism ... it does not appear to be made by Philips. I googled images of CDM12.1 and confirmed it to be different from that on this unit. I did find a part number SF-HD850 behind the laser head, so I presume I need a Sanyo SF-HD850 laser unit.

Before I order a replacement laser (I found 2 sellers on eBay) is there a way to confirm that it is indeed the laser which is at fault? Remember, on powering up, neither does the disk motor not spin/move the head, nor does the motor work for ejecting the disk.

I am, of course, in the meanwhile doing the obvious:

a. checking all the voltages of the 5 independent power supplies
b. removing and re-inserting all the connectors and verifying connectivity
c. cleaning the lens
d. checking all the motors
e. carefully looking for any signs of dry solder

Looking forward to comments and reccommendations,

Rgds
Mayank
 
Mayank said:
Hi PR Audio:

Thanks for your response.

I would really like to try and repair the CD player myself (of course, along with help from the yodas in the forum!). Learning and understanding the logic of fault finding is what got me into this hobby in the first place :D

I have removed the CD mechanism ... it does not appear to be made by Philips. I googled images of CDM12.1 and confirmed it to be different from that on this unit. I did find a part number SF-HD850 behind the laser head, so I presume I need a Sanyo SF-HD850 laser unit.

Before I order a replacement laser (I found 2 sellers on eBay) is there a way to confirm that it is indeed the laser which is at fault? Remember, on powering up, neither does the disk motor not spin/move the head, nor does the motor work for ejecting the disk.

I am, of course, in the meanwhile doing the obvious:

a. checking all the voltages of the 5 independent power supplies
b. removing and re-inserting all the connectors and verifying connectivity
c. cleaning the lens
d. checking all the motors
e. carefully looking for any signs of dry solder

Looking forward to comments and reccommendations,

Rgds
Mayank
Click to expand...

Welcome to my world againg, everyone told me my CDP uses a Philips CDM 12 unit, but the pic didn't look like the one I had, so I took it apart only to find out it was a Sony KSS-210A laser pickup, or Sony KSM-2101ADM for the complete mechanism.

In my case I went the easy route, since I am not very skilled in electronics had my cousin check for other failures then, once it was determined the problem was the laser pickup I proceeded to order the complete mechanism with motors and laser. The mechanism was $39.00, if I would have purchased only the laser pickup and it would have been $10.00. In order to avoid additional headaches, and taking in consideration that $39.00 is not much, I ordered the complete mechanism.
 
Since it doesn't respond at all to any controls, it is not likely to be a problem with them mechanism, unless the loading belt is slipping and it is neither in the loaded or open position. Listen carefully and see if maybe the loading motor is turning but the belt is slipping. See if you can locate the 5V supply for the microprocessor. If it is low, like 4.6V, there is probably a bad cap in the power supply. I see a multi - pin IC on the right that looks like it is in a socket. Try pushing down on it and any other socketed ICs to make sure it is properly seated. I worked on a Shanling recently, but it was a different model, with a huge motherboard, and tubes. It used a Phillips mechanism. I can't tell from the photo if yours is a Phillips, but that is not a concern right now. I think you have an electronic problem.
 
dr*audio said:
Since it doesn't respond at all to any controls, it is not likely to be a problem with them mechanism, unless the loading belt is slipping and it is neither in the loaded or open position. Listen carefully and see if maybe the loading motor is turning but the belt is slipping. See if you can locate the 5V supply for the microprocessor. If it is low, like 4.6V, there is probably a bad cap in the power supply. I see a multi - pin IC on the right that looks like it is in a socket. Try pushing down on it and any other socketed ICs to make sure it is properly seated. I worked on a Shanling recently, but it was a different model, with a huge motherboard, and tubes. It used a Phillips mechanism. I can't tell from the photo if yours is a Phillips, but that is not a concern right now. I think you have an electronic problem.
Click to expand...

It's good when someone with more knowledge gives his opinion. Thinking about it, mine all the controls worked, and the spindle would come up, but the disc wouldn't spin.
 
PR Audio said:
It's good when someone with more knowledge gives his opinion. Thinking about it, mine all the controls worked, and the spindle would come up, but the disc wouldn't spin.
Click to expand...

That's usually the laser being bad, but it can be the disc motor, or the pickup limit switch. If the pickup lens goes up and down (that's focus search) then the limit switch is ok. If it does focus search but the disc doesn't spin and you hear a sizzling sound from the mech, the disc motor is bad. No sizzling sound means you've got a bad laser or possibly the cable going to the pickup. In the case of Phillips mechs, you just replace the entire mech for $20.00 (MCM has them) and it fixes the problem, whether it's the motor or laser or switch. The funny thing is, the replacement seems to last a long time, even though the part seems to be cheaply made. Perhaps it's a quality issue.
 
dr*audio said:
That's usually the laser being bad, but it can be the disc motor, or the pickup limit switch. If the pickup lens goes up and down (that's focus search) then the limit switch is ok. If it does focus search but the disc doesn't spin and you hear a sizzling sound from the mech, the disc motor is bad. No sizzling sound means you've got a bad laser or possibly the cable going to the pickup. In the case of Phillips mechs, you just replace the entire mech for $20.00 (MCM has them) and it fixes the problem, whether it's the motor or laser or switch. The funny thing is, the replacement seems to last a long time, even though the part seems to be cheaply made. Perhaps it's a quality issue.
Click to expand...

Yep, the laser will do focus search, and the disc motor does not hum or do funny noices. So, as to be 100% sure for $39.00 I just ordered the complete mechanism with laser pick up (Sony KSM-2101BDM) for $39.00. The original ends with ADM, but asking around found out that the B is the newest laser that can read other CD formats without modifications to the equipment. The very least is a direct replacement for A.
 
dr*audio said:
See if you can locate the 5V supply for the microprocessor. If it is low, like 4.6V, there is probably a bad cap in the power supply. I think you have an electronic problem.
Click to expand...

Thanks for putting me on to the right track!

The 5V supply was showing really low, only 3.8V. On a hunch, I checked the other voltage marked as -25V and found it to be only -17V. Back tracing the voltages, I found the problem - the unit was configured for 220V!

The transformer has two primaries with a center(?) tap. Without access to a schematic, I am going to check if the two primaries are in series for 220V and if I could put them in parallel for 100V.

Will report progress.

Mayank
 
Mayank said:
T
The transformer has two primaries with a center(?) tap. Without access to a schematic, I am going to check if the two primaries are in series for 220V and if I could put them in parallel for 100V.
Click to expand...

I would suspect that the tap has to be used for 110 v, and measure the DC resistance of the winding between one of the two extremes and the center. If it measures half the resistance between the extremes, I would think it's a half-way winding output (therefore, would be thinking more on the secondary winding rather than on the primary, you have to make sure on this important point to avoid any damage!). I know that many universal voltage units have to be reconfigured by changing the transformer wiring (e.g. I've seen a Mc Intosh power amp like this) but never have done anything like this myself. Try to google some information on this transformer rewiring or wait until somebody with experience on this can tell you.

All the best
 
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I have exactly the same problem as Mayank with my Shanling CD-S100-se vacuum tube CD player.

Like Mayank, after having a look at his photo, the mechanism is made by Asatech (China), model WXD-8110, and the laser is a Sanyo, probably the SF-HD850.

I've carefully check connectors, cables, motor belt and so on, but I'm unable to find the real cause of this problem.

Do you think it is possible to find spare parts or a complete mechanism with laser to replace my one ? (if you have an address or other information, please, help !)

Or do you think that I can replace this device by another one like a Philips CDM-1210 or equivalent ??? Any advice will be greatly appreciated because I really enjoy the sound of this CD player which has been upgraded (AOP, triode) ! Many thanks in advance !
 
Zenon said:
I have exactly the same problem as Mayank with my Shanling CD-S100-se vacuum tube CD player.

Like Mayank, after having a look at his photo, the mechanism is made by Asatech (China), model WXD-8110, and the laser is a Sanyo, probably the SF-HD850.

I've carefully check connectors, cables, motor belt and so on, but I'm unable to find the real cause of this problem.

Do you think it is possible to find spare parts or a complete mechanism with laser to replace my one ? (if you have an address or other information, please, help !)

Or do you think that I can replace this device by another one like a Philips CDM-1210 or equivalent ??? Any advice will be greatly appreciated because I really enjoy the sound of this CD player which has been upgraded (AOP, triode) ! Many thanks in advance !
Click to expand...

Zenon,

Welcome to the forum. You have opened an older thread, but according to this list: http://www.vasiltech.nm.ru/files/cd-players/CD-Player-DAC-Transport.htm#S The Shanling S100 uses a PCM 1732 DAC and CDM 12.10 transport. If you return here, hopefully this info helps.

Good luck,

Ron
 
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