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I got my hands on a non-functioning Toshiba DVD-9200. It won't load. But is was relatively highly praised by Stereophile back in the day for its audio quality on two-channel. Built like a tank outside of the loading mechanism.
I was wondering whether there was any way whatsoever to take advantage of its DAC by essentially using it as a DAC.
There are only outputs, no digital inputs. Is there some cost effective manner by which some input function could be created to utilize the DAC?
Like I said, probably a stupid question.
Thanks anyone.
Follow Ups:
Try reseating all the ribbon cables in the player. I have had this problem occur over the years, and opening the box and reseating the cables has worked for me.
This may restore the transport to operability.
DaveT
Thought I would build a headphone amp and who knows what. Now I have a bin of separated circuit boards fragments that's been sitting there for maybe ten years! At some point, you say, buy, buy -- it is much simpler!
... to fix the unit and use it the way it was intended. If you can't do it yourself, see if there's an authorized Toshiba dealer in your area and find out if they can fix it. It looks like a nice unit from what I read in the Stereophile review Joe Murphy Jr was kind enough to link to, it may be worth fixing.That's a lot easier and plausible compared to taking it apart to somehow use as a stand alone DAC. I'm just sayin.'
Best regards, Ralph
Edits: 05/10/12
Disclaimer: Proceed at your own risk, hobbyist and or modifier assumes any and all liability and should be cognizant of all safety procedures regarding working with electronic devices. The following is for informational purposes only.
Once under the hood look for the output circuit board “EU05” that's the one to the right rear of the case it may be marked pc-output, be careful of the ribbon cable they break very easily. The DAC and output buffers are mounted on this board. The 26 trace ribbon cable runs from the CN901 connector on the EU01 main circuit board to the CNY01 connector on the EU05 output board. Pin 12 on the CNY01 is the ADATA1 input on the EU05 then through RY08 a surface mount 100 ohm resistor to pin 27 the SDATA input of ICY12, digital to analog converter. There are three DAC ICs, one for the front channels, one for the surround channels and one for the center and sub output. All are the Analog Devices AD1853 Sigma-Delta DAC, the ICY12 is front or 2 channel, the ICY13 is surround and the ICY14 is center / sub. The output from the DAC then feeds into the ICW05, ICW06, ICW09, ICW10 op amps, all of which are the MJM5532M. This is a three stage op amp output. The 5532M is a one dollar op amp so could be improved upon maybe a LME45720, OP275 or OPA2132. The AD825 is single channel so would take more work to use here. The input is best dealt with quickly by building the standard spec sheet circuit for an external SPDIF input using a CS8414-CS, PALCE22V10-J.
Remember nearly anything is possible given enough effort but the question is, is it worth it? All of this is more time and expense than simply buying a $500 stand alone DAC which would sound better than modifying this boat anchor.
Holy Mackerel! That is some procedure!
Speaking about boat anchors, I have the same Toshiba, and it reads and plays disks, but it is way too sensitive to errors on the disks. It gets hung up on disks that my inexpensive NAD sails through. Do you have any suggestions short of replacing the transport (which I can do)?
Thanks either way! You seem to know something about this machine!
Dave
to observe the CD 'eye pattern' off of the RF test point. The CD RF Signal is at pin 45 test point of IC502, the chip is marked Toshiba TA1313F. The RF signal is also at pin 142 of IC401 marked TC9489F. Test points are on the main pc board “EU01”.
Typically, if a player is too sensitive to pit defects the focus gain and / or tracking gain will need to be decreased slightly. This is assuming that the sled mechanism is functioning correctly, it could be a bad spindle motor starting to fail or the laser diode pickup head may need to be replaced. Historically on many CD players one could adjust the servo gain manually but the Toshiba has automatic servo adjustment and if it is off they say replace the pickup head assembly. If one wishes to go beyond the service manual the servo control chip is IC503, marked KA3032. The Focus Coil is off IC503 at pins 37 ( + ) and 38 ( – ) they go to connector CN501 at pin 15, FC ( + ) and pin 18, FC ( – ) GND. The Tracking Coil is off IC503 at pin 36, TC ( + ) and pin 35, TC ( – ) and over to connector CN501 at pins 17 ( + ) and 16 ( – ).
Thank you for the detailed response! I have a scope but it is not a high frequency scope. I should have stated before that the sled mechanism does not appear to be functioning correctly. It is functioning, but seems to be a little clunky. It is also noisy, which I have read is not uncommon with this player. Toshiba came up with a "fix", but I don't know how to verify if it has been done to this player, but I strongly suspect it has not.
Can the spindle motor be replaced by itself, or do you need a whole new sled?
Dave
None of the usual suppliers such as pacparts has any stock left of the older Toshiba parts. At this point if you can find a working transport assembly salvage it for spare parts.
The parts are as follows;
Loading motor assembly was $35 part# 79070484
Feed motor was $27 part# 79070421
Laser pickup part# 79070470 overpriced, I think the last price was $150
The spindle motor RM01, CL923U was not available separately, part of the laser assembly I believe and there is a problem, many of the single bearing DVD player spindle motors have a high failure. They are usually just a 5 to 15 dollar part. Unless you can find a part house that still has some NOS motors, you'll be hard pressed to find a used Toshiba 9200 that has a working spindle motor after 10 years of use. The only solution is a kludge to adapt a motor from a DVD Rom drive to the control board it will need to be a 5 lead motor. A shame that an expensive player is basically unrepairable after 10 years due to a simple motor.
Thanks much for the parts. I am not above scrounging around.
- A shame that an expensive player is basically un-repairable after 10 years due to a simple motor.
My Mission DAD-7000 works fine and sounds good as new (which actually is not that good!), after I replaced the drawer belt with an O-ring form the hardware store. I even have a working Magnavox CD-1, which sounds even wore than the DAD-7000.
Yet Art Dudley's Sony and my Toshiba are feet-up on the table before their 10th birthday!
Dave
If you really need one.
New Zealand ebay item 170784413891 NEW TOSHIBA MECHA ASSY PU 79070470
Both written in the 90s but still covers the basics. Overpriced new but you can get a used book at Alibris.com or Powells used books.
Troubleshooting and Repairing Compact Disc Players by Homer L. Davidson
Understanding and Servicing CD Players by Ken Clements
Thanks for both posts! I have used Powells before. I track those books down.
I bought this thing for very cheap at a thrift store. As you say, it is a boat anchor today. If I wreck the thing tying to fix it, I will chalk it up to a learning experience and a donation to Good Will. I am interested in learning how to fix CD players.The build quality on this thing is very impressive!
Dave
Edits: 05/11/12
I have one. You cannot make it a DAC for any reasonable amount of money unless you are extremely knowledgeable. The user manual is available online and the transport is available on eBay. The remote is available too. I also think it is a great sounding player. You will have to have it hooked to some kind of TV screen to operate it fully. I use a very small flat screen that was given to me because it cannot receive digital.
When you say it won't load, do you mean the CD drawer will not open or that when the CD loads, it does not read it. If the drawer won't open, it is usually a simple belt replacement (although I have done belt replacements that were not that simple). If it won't read, then it is more complicated.
It does not sound like you are very tech savvy. I am, but I would never attempt to covert a CD/DVD player to a DAC. If you have a good tech in your area who is reasonable priced, I would take your Toshiba there for an estimate.
Good luck! The DVD-9200 is an extremely well built player, but it is complicated to operate.
Dave
The drawer opens & closes fine,
- But it will not load a CD (only says "Loading" forever)
- With a DVD it always says "Disc Error".
Thanks
.
Dynobots Audio
Music is the Bridge between Heaven and Earth - 音楽は天国と地球のかけ橋
Try to find a replacement transport (if that really is the problem). Just know that it will be nearly impossible to locate a new one. You might try ebay or craigslist .
There is a way to use the D-A section of the player (it's basically extensive modification work), but it would in no way be cost effective or, in my opinion, worth it.
Do you no what issue this was reviewed in, I have pretty much every issue since 93 and don't recall it.
.
Nt
Observe, don't think
If you did'nt also happen to get your hands on the user's manual, you' ll probably have to go on the Toshiba website to see if you can download the user's manual for the model of the player you haveThe manual will give you some idea of what your options are using the player as a standalone DAC
Oops, I did'nt read the part about it not having any digital inputs, so I think your only hope is to see if you can get the transport running, sorry !
Edits: 05/09/12
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