CEC TL5100 repair?? - diyAudio
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Old 14th January 2007, 10:52 AM   #1
spa317 is offline spa317  Australia
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Default CEC TL5100 repair??

My TL5100 transport was spinning cd's but the laser was unable to read the TOC and thus play discs. So, I managed to track down and buy and have a new laser assembly installed (by a friend), but now the player wont even spin the discs at all when the lid is closed. I have ruled out the microswitch which is activated when the lid is closed, and not being a techie I dont know where to go next.

There are no decent technicians where I am (small town in Australia), and am a bit worried about parts or service availability for the CEC. A guy on the net suggests it might be the main motherboard, and I have no idea if this might be the problem nor where to find theseif it is.

Anyway, if anyone has any suggestions on what to do next (please dont mention a boat anchor!), or where to access some help, it would be greatly appreciated! Especially any help available within Australia.

I know that Parasound used to support CEC in the US, but they withdrew from this a couple of years ago.

Cheers,

Mark
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Old 15th January 2007, 01:59 AM   #2
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I don't know the CEC specifically, but most cd lasers are shipped with a shorting jumper of some kind to protect the laser diode from static damage. It is most often a solder bridge, where two close together "lands", usually semi-circular facing each other, are joined together with a big blob of solder. This needs to be removed with a soldering iron before the laser is usable. Some have a small metal clip at an edge of the laser's circuit board that shorts two lands. Leaving it shorted virtually never damages the driving electronics of the unit, but it is possible. So, simply unshorting the shorting jumper should set things right.
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Old 1st January 2010, 07:28 PM   #3
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PCM decoding and the transport mechanism are based on Sanyo. The laser unit (optical pick up) must be either SF-P101N or SF-91P.
http://www.donberg.ie/catalogue/lase...p_101n_16.html
http://www.donberg.ie/descript/2/21232-g.htm
If there are (by CEC) no service manual, it must be find out an appropriate SANYO cd player model with the same PCM decoder PCB and mechanic inside to order the service manual by your Sanyo service center

Last edited by tiefbassuebertr; 1st January 2010 at 07:31 PM.
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Old 2nd January 2010, 05:12 AM   #4
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Hello, The TL5100 uses the Sanyo SF-P1 with 2 sets of wiring with plug connectors. I don't see anywhere to desolder or invoke the operation like some Sony optical units which are shorted with solder and have to be removed prior to installation. I'm unsure if you own an early or late model. The early models have the SF-P1 head and can be determined at the side of the head mechanism. Its also with 2 sets of wiring. If these telltales aren't there, its likely a newer model supeceded with another optic head model.
Its quite possible the replacement head coincidently also be defective. This early model of optics aren't designed to read CDR or the likes, AFAIK.
On the motherboard, there's numerous preset adjustments to calibrate the head for optimum operation. Under no circumstances these should be dabbled with (or modding with upgraded caps, etc) unless very knowledgeable and armed with the factory service proceedure, test gear and test disc.
This CDT is one tough nut to address a problem on one's own. I only have the circuit diagram, and no service proceedures.
Its a gem of a transport and mercilessly revealing of bad CD recordings or mastering.

Last edited by coolmaster; 2nd January 2010 at 05:20 AM.
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Old 2nd January 2010, 12:29 PM   #5
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you are right. It must be this laser-unit:
JusTone Lasereinheiten. SF-P1 6-6Pol. / SFP1-6/6 SANYO. Lasereinheit, Laserpickup, Laserunit, Pickup, Laser, Laserkopf, Laufwerk, Mechanism
(side view see attachement)
The adjustments on the motherboard are close by that one of most other CD player models, as I know:
1) For the Focus "Offset", "Bal" (for best diagram of RF signal) and "Gain"
2) For the Tracking also "Offset" (for best diagram of RF signal) and "Gain"
3) VCO
That the early model of optics aren't designed to read CDR, cannot be true. But nothing of Sanyo's SF- and SFP-Series aren't designed to read CD-RW. But today this medium it not more very important.

The Sanyo motherboard (main PCB) was used in some other models of foreign brands (e. g. Audiomecca Obsession-II) but also in some models of Sanyo itself (this models I must still find out).
Here are some URLs of datasheets regarded the PCM/Servo Processing OFP's on this Sanyo main PCB:
1) Sanyo LA9200NM RF-Servocontr
LA9200NM datasheet pdf datenblatt - Sanyo Semicon Device - Analog Signal Processors for Compact Disc Players ::: ALLDATASHEET :::
2) Yamaha YM7121C PCM Processor/Controller incl. integr. RAM for buffering
YM7121C datasheet pdf datenblatt - YAMAHA CORPORATION - SIGNAL PROCESSOR AND CONTROLLER (AND RAM ) FOR COMPACT DISC PLAYER (SPC V) ::: ALLDATASHEET :::
Attached Images
File Type: jpg Sanyo Main PCB for CEC TL series.jpg (92.9 KB, 600 views)
Attached Files
File Type: pdf Sanyo SF-P1 bottom.pdf (64.3 KB, 293 views)

Last edited by tiefbassuebertr; 2nd January 2010 at 12:32 PM.
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Old 11th April 2011, 12:31 PM   #6
bitravi is offline bitravi  India
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Dear Mark,

I have successfully implemented SF-90 in place of SF-P1,

Please wear a pair of gloves before replacing them.
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Old 13th April 2011, 09:01 AM   #7
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I am still looking to Sanyo CD player models, where the Sanyo motherboard from post #5 is in use.
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Old 16th June 2011, 05:07 PM   #8
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I am still looking to the associated Sanyo cd player models.
BTW - by post #6 and #7 about
CEC TL51X CD Transport
there are scanned jpg files about the schematic diagram of TL5100 PCB from post #5 here
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Old 21st December 2011, 12:10 PM   #9
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check out this thread:
Yba cd2 delta, classe cdp .3, roksan caspian ... main board
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Old 6th January 2012, 12:24 PM   #10
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in this case this thread could be of interest:
Parasound "C/DP 1000" (CDP1000 C/DP1000 CDP) CEC 2100 3100 Service Manual wanted
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