Question about Pioneer Audio Players & Recorders

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Have replaced laser and spindle motor. Tried variouse acjustments. The spindle motor will turn, the traverse will search up and down, it makes the usual noises while the laser is picking up some signals but at the end it does not recognise a disc. We are a service center. I have never been able to get one of these models to work. Am I missing something here? Are there any other common faults causing this problem. Has it to do with alignments? (Have tried variouse settings with no success including stting a different turntable height, adjusting laser to variouse settings etc. Please can you suggest something? Eric Pal Tech Services

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  • service_tsv Sep 04, 2008

    THANKS DAVE



    THE MODEL NUMBER IS PD-M427



    ANOTHER REPLAY WOULD BE APPRICIATED



    ERIC

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If this is a Pioneer CD player, you may need to do a grating adjustment. Do you have the service manual? What model number is this?

I may be able to help you more with this information.

The grating adjustment is needed on many different Pioneer CD players, mostly the older models. There is a smaill area on the pick up with a copper colored plate that must be moved just a little one way or the other. You put a very small flat head screwdriver in and move this copper plate just a little one way and then try again the other way if it doesn't work the first time.

There is a jig set up that Pioneer outlines in the service manual to do this properly. You need an O-scope as well to moniter a point on the jig. I have done this before without using the jig or O-scope, but it is more presise with these things being used.

This procedure needs to be done in the test mode so the disc is spinning constantly and then do the adjustment while watching the O-scope to know when the adjustment is at the proper position.

If this is a model that I have the service manual for, I can outline the procedure very well for you. But first I need to know the proper model number which I did not see in your post.

Let me know,

Dave

Posted on Sep 04, 2008

  • Dave DeGain
    Dave DeGain Sep 04, 2008

    I checked and could not find the service manual for the model you have. I even checked on Pioneers service website and they have no manuals or bullitins for it either.



    The bottom line is I can not give you the details I hoped to have.



    Since this is a 6 disc changer with a magazine, it has the traverse deck (pick-up assembly w/spindle motor) on the top of the cd mech with the pick-up right there with the laser pointed down. This means that you should be able to see the area that needs adjustment very easy and get access to it with out any trouble. As I stated before, there is a small copper colored piece of metal that needs to be adjusted. You can look right at the pick up and see it, it has a notch in it where a small flathead could fit into. That is the spot to use for moving that copper piece inside the pick up. You would then just move that copper piece a very small amount one way, just nudge it a hair, then try playing a disc again. If it doesn't work, nudge it a little more, then try playing a disc again. If it still doesn't work after 3 or 4 nudges, nudge it back the other direction a few times while trying to play a disc in between each nudge of the copper piece.



    If you have changed the spindle hieght and made adjustments to the laser power on the pick up, you may need to have a new pick up and spindle motor if you can't get those things back to the original settings. This adjustment may not work properly if the laser power is too high or too low, or if the spindle table is too high or too low. You can adjust the laser power output by monitoring the eye pattern with an O-scope and then adjust it to about 1.2 volts peak to peak That should put you right where you need to be. The spindle table you will just need to wing it and make sure it doesn't look too far away from the disc when loaded with one.



    I wish I could have had the service manual for it, but I don't. So this is the best information I can give you. You may want to just order one from Pioneer since you said you work on a few of these and could never get them to work. The one-time investment for all the exact information on the grating adjustment would be a great help to you in the future. The service website that I accessed for Pioneer did not have anything on this model, but that is because it is a little too old. They do have hard copy service manuals you can order and have shipped to you. I was looking for a PDF to download which they have lots of, but only back to a certain year. Everything else older is only hard copies.



    I hope this helps, and a good rating would be appreciated.



    Thanks,

    Dave

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The DVD player tried to read the DVD and stopped. It said H07 and then display reads STOP


Many Panasonic DVD units use a traverse unit (spindle motor/laser assembly) - and the H07 error indicates a failure of this component block (the spindle motor is the part of the unit which fails first).

This part is not repairable, it can only be replaced by a qualified authorised Panasonic technician - then it must be aligned and the firmware updated/configured to the player. The problem with this is the costs involved; a new spindle motor/laser unit (through Panasonic directly) would cost around $200 trade plus the labour/fitting/alignment - it could be a further $200 - making it uneconomical to fix - since this would be about the price of a new player.

However, you can submit the unit to a service centre, for a quote on the likely part/labour cost(s), then make a decision afterwards - whether to go ahead with the repair or cut your losses and buy a new player.

Blu-Ray players (with DVD playback support) are becoming cheaper to buy nowadays while repairs to DVD players become more expensive. It's up to you.

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If you want to get it fixed, by all means take it to an authorised service centre and get a quote, then you can decide afterwards whether or not to go ahead with the repairs to this one, or buy a new player. It is up to you.

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THANK YOU DAVE, THE PIONEER PLAYER MODEL NUMBER IS PD-M427 IF YOU COULD BE SO KIND AND INSTRUCT ME WITH MORE DETAILS ON ALIGNMENT /SERVICE MODE PROCEEDURES WOULD BE APPRICIATED. I AM REPETING THIS TEXT...


As you are a 'service centre' you should know to check the laser power with your laser power meter before anything else after checking the sled motor and spindle motor, assuming the laser is lighting.
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