Philips CD80 tray problem? - diyAudio
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Old 8th November 2002, 04:57 PM   #1
HH is offline HH  Denmark
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Default Philips CD80 tray problem?

I have a beautiful Philips/Marantz CD80 that has a Philips CDM1 transport. When the tray has been closed, the motor that does the job keeps on running for maybe two seconds before stopping. It might have always have done it, but I would like to fix the problem -if it is a problem.

Anybody out there who has experienced the same thing with the Philips CDM1 transport? And if so, is there a fix?

Thanks.
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Old 9th November 2002, 09:50 AM   #2
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This is standard with CD 80's. I know this fantastic cd player well and they do it all.
Although I have never seen a CD 80 with tray problems I advise you to buy a new rubber belt ( just in case ) before they are obsolete. It they aren't already. Clean the laser with a soft cloth and a drop of water with soap. Make circles while cleaning. Never use alcohol !!!!

Off topic: change the NE5534's for OPA627's and remove the 22 pF SMD capacitors between pins 5 and 8 with desolder-litze. Do this at all NE5534's ( if you replace them for OPA's that is ).

Replace cap 2525 ( 470 uF) on the power supply for a 1000 uF 16 V type. Replace all 47 uF on the mainboard and on the power supply for new ones since they are 10 years old ( at least ).
Keep the 100 uF Cerafines ! They are OK.

Replace the 2450 and 2451 caps in the servo ( 100 uF 40 V ) for audiophile types.

Place small 100 nF caps from pin 1 to pin 2 and from pin 2 to pin 3 on IC 6522. Place small 100nF caps from pin 2 to 1 and from pin 1 to pin 3 on IC 6523.

If you have a low jitter clock like Guido Tent's or Elso Kwak's: Remove crystal 1302 ( 11.289 MHz ) and caps 2328 and 2329 ( 47 pF ). *Keep resistor 3366*. Connect the low jitter clock to pin 11 of IC SAA7220PB. Connect power leads of the clock supply to cap 2524. This is the mod that makes 50 % in terms of quality of all mods.

More mods are possible but these are the simple and very effective ones. I wouldn't advise you to remove the SAA7220PB so that the player will be an non os one. You'll regret that afterwards.
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Old 10th November 2002, 09:07 AM   #3
HH is offline HH  Denmark
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Thanks a lot for your reply. I really appreciate your advice, and I will try the modifications very soon.

Does anybody out there know of a source for replacement limit switches for the transport?
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Old 10th November 2002, 02:36 PM   #4
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Ok, if you insist on repairing something that ain't broke:

The source for replacement limit switches is Philips itself. I think it's wiser to buy an old Philips cdplayer with CDM 4 for parts.
Most of the CDM 4 parts are equal to those of the CDM 1.
Try finding a CDM 1 before it is too late, they have become very very rare.
I advise every CD80 owner I know to buy an extra CDM 1 because it is the only part that will determine the lifetime of the player. Some of them actually found a spare one.

Partnumber for the belt is: 4822 528 81146
Partnumber for the switch is: 4822 276 11277

Please have both numbers checked when you order them.
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Old 27th November 2002, 06:29 PM   #5
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Jean Paul,

Do you think it's still worth to upgrade a CD-80?
I heard several people who think it's to old to upgrade: a waste of money some say...

Could you please contact me!



Jan van der Wal
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Old 28th November 2002, 04:54 AM   #6
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Default Too old to upgrade???

Who told you that nonsense? It is one of the best transports ever made. I rework them all the time.

Jocko
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Old 28th November 2002, 08:36 AM   #7
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Couldn't agree more, Jocko !

Although I thought it was impossible it seems I found a source for lasers for the CDM 1. Waiting for their answer now. Their system says it is still in stock...

Jean-Paul
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Old 28th November 2002, 07:06 PM   #8
HH is offline HH  Denmark
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I have now made some of Jean Pauls modifications on my CD80, and so far the results are very encouraging.

I would appreciate if one of you could give me the Philips part number for the CDM1 laser.

Thanks.

Kind regards

HH
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Old 28th November 2002, 07:33 PM   #9
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4822-691-30123 is what I am told. Did you do the clock mod, HH ?

Jan van der Wal, I sent you a private email but I don't get a reply.
Did you receive my mail ?

Another tip: connect a OSCON 100 uF 20 V direct over the supply pins of the SAA7220 dig. filter. Better is to give it its own clean supply. Add an extra well decoupled 7805 and if you're brave you can feed it with a new transformer and bridge.
This "famous" IC tends to throw a cartload of garbage on the 5V supply line.
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Old 28th November 2002, 07:37 PM   #10
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Quote:
Originally posted by jean-paul
I'll be back.
Hi Jean-Paul,
Totally off-subject.
I e-mailed you to two adresses about the Audionote DAC-3 schematic but got no reply.
The e-mail button below your post is desabled. When will you be back?
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