I have a Cyrus PCM II CD player which I have always thought was very good.
Unfortunately, I haven’t been able to use it for several years as the laser has gone on the blink – it will only rarely play a CD. I replaced it with a NAD C521BEE which I don’t think is as good.
This is annoying. One small part is stopping me using the Mission. Mission say they no longer have the lasers – which I believe were made by Philips – and so can’t repair it.
So… does anyone know where I could find one? There must be one somewhere in the world.
Thanks.
Unfortunately, I haven’t been able to use it for several years as the laser has gone on the blink – it will only rarely play a CD. I replaced it with a NAD C521BEE which I don’t think is as good.
This is annoying. One small part is stopping me using the Mission. Mission say they no longer have the lasers – which I believe were made by Philips – and so can’t repair it.
So… does anyone know where I could find one? There must be one somewhere in the world.
Thanks.
The Mission PCMII uses the Philips CDM4/11 laser which is no longer available new (occaisionally from EBAY). It is, however, used extensively in other players.
Having said that, the symptoms you describe do seem to point to a very common fault with Philips-based players, drying electrolytic capacitors.
There are many threads about this problem.
Usually, it involves replacing the caps in the servo region. A 33uF cap is particularly prone to failure.
If you post a photo of the mainboard, someone will point out the cap to change.
Andy
.
Having said that, the symptoms you describe do seem to point to a very common fault with Philips-based players, drying electrolytic capacitors.
There are many threads about this problem.
Usually, it involves replacing the caps in the servo region. A 33uF cap is particularly prone to failure.
If you post a photo of the mainboard, someone will point out the cap to change.
Andy
.
Andy,
Many thanks for this advice and I will post a pic shortly, once I have dug the Cyrus out again. I also have the circuit diagramme (I think) which I could scan if this is of help. I am not an electronic engineer, but my father is (even if he is in the wrong country). Anyway I am sure I could get the repair effected if this is what the problem is and I can get the part.
The symptom is that when you put a CD in and press play, it just says "error" and nothing happens. Last time I looked, though, it would occasionally "bite" and play without difficulty, but it is a rare occurrence. Is this consistent with the often-failing cap?
Seems a pity to junk an entire great CD player for one or two components.
Alex
Many thanks for this advice and I will post a pic shortly, once I have dug the Cyrus out again. I also have the circuit diagramme (I think) which I could scan if this is of help. I am not an electronic engineer, but my father is (even if he is in the wrong country). Anyway I am sure I could get the repair effected if this is what the problem is and I can get the part.
The symptom is that when you put a CD in and press play, it just says "error" and nothing happens. Last time I looked, though, it would occasionally "bite" and play without difficulty, but it is a rare occurrence. Is this consistent with the often-failing cap?
Seems a pity to junk an entire great CD player for one or two components.
Alex
The appropriate Philips service manuals for this Mission/Cyrus model are for follow models:
1) CD371
2) CD373
3) CD471
4) CD473
5) FCD673
Additional you need the Service Manual supplement from CDM4
Replace all electrolytic capacitors arround the APC unit so as arround the RF amplifier- and servo units and only then start with your actually troubleshooting.
Electrolytics with values than 1 uF or below replace through small non polar WIMA MKS versions.
BTW - defects of the 780-785 Nm laser diode (mostly ROHM RLD78) are considerably rare in this and older Philips mechanism model than by SONY KSS series - nevertheless not too bad to replace and easy to get.
1) CD371
2) CD373
3) CD471
4) CD473
5) FCD673
Additional you need the Service Manual supplement from CDM4
Replace all electrolytic capacitors arround the APC unit so as arround the RF amplifier- and servo units and only then start with your actually troubleshooting.
Electrolytics with values than 1 uF or below replace through small non polar WIMA MKS versions.
BTW - defects of the 780-785 Nm laser diode (mostly ROHM RLD78) are considerably rare in this and older Philips mechanism model than by SONY KSS series - nevertheless not too bad to replace and easy to get.
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The Mission PCM2 is based on a Philips CD670, not a CD371 or any of the other models you listed tiefbassuebertr. Gliddofglood, give me a PM if you want me to email you the CD670's service manual.
Andy's comments are right on topic, this is the first thing I would check as well. The servo board is located right in the middle of the player, largely obscured by the mainboard which sits above it. My blog has a post about the PCM2, see the link under my post.
Andy's comments are right on topic, this is the first thing I would check as well. The servo board is located right in the middle of the player, largely obscured by the mainboard which sits above it. My blog has a post about the PCM2, see the link under my post.
Main problem for buying a Philips as spare part reservoir ist the fact, that both Mission PCM-II and Philips CD670 uses different servo boards (and thus different CDM versions) - go to the attachments and check out labeled sticker on the TDA5708.
Question for me is, what service manual I need from Philips concerning the obviously most used servo boards "5886" and "6105"
According image No 6+8 under
http://www.lampizator.eu/lampizator...undig CD-9000 cd player with tube output.html
Grundig CD9000 use also the servo board 5886, but for the CDM-2/29.
But Philips service-manual "CDM-2" mentioned only the servo board versions 5725, 5768, 5826 and 5827.
Maybe there are various supplements.
Thanks for any advice.
P.S.: here was the PCM-II envelope replaced by a metal version - check out the images
http://bbs.hifidiy.net/thread-1320015-1-1.html
http://bbs.hifidiy.net/thread-1320015-3-1.html
Attachments
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on ebay there are to find single laser units (RAFOC) for various CDM-4 versions, but mostly without CD-mechanism:
https://www.ebay.de/itm/325322098819 (CDM-4/13, order code 4080413)
https://www.ebay.de/itm/325246084472 (CDM-4/38)
https://www.ebay.de/itm/325298692743 (CDM-4/16)
https://www.ebay.de/itm/253203941142 (CDM-4/36, CDM-4/IND)
https://www.ebay.de/itm/265827369719 (CDM-4/11 incl. mechanism)
https://www.ebay.de/itm/194887111011 (CDM-4/??)
most differences between the various CDM-4 mechanism I know (e.g. different mechanical parameters and motors).
What differences are important to know between the mentioned RAFOC units (Philips order code therefore are not to find in the service manuals) ?
I am a fan of the TDA1541 and I am curious about the alternative uses (outside the traditional Philips uses) of this converter.
I've recently purchased a non-functioning PCM II to fix (which I've already done with a Cambridge Audio CD2 and an Adcom GCD 575).
The CDP was internally quite bad, full of dust and with an unreassuring appearance.
For this reason, while using good quality capacitors to replace the old ones, I didn't want to overdo it.
I reserve the right to produce photos, perhaps, of the work done and of the characteristics of the model in my possession.
What I want to anticipate is that my PCM II has a CDM2/29 and a related 5886 control pcb.
Another thing I want to underline is that - as well as the Cambridge Audio CD2 - it presents (in some points at least) a clear underestimation of the power handling of the resistors used; this prudently advised me to replace them (even if they weren't burnt yet but quite blackened) with others with better power handling.
In my recovery activity I have to reassemble the boards but first I would like to replace the aged NE5534 which precede the NE5532 in the analog output board; I replaced the latter by inserting the LME49720s in a socket and I would like - logically? - replace the NE5534 with the LME49710.
Then I would check the operation of the laser but I would like to take precautions, in case it doesn't work. In this perspective I recently recovered an old Grundig CD8100 but bad luck wanted it to have a CDM4/25 (probably a more recent model...) instead of the CDM2/29.
Do you think the two laser optics would be interchangeable?
Could I replace the laser optics with a CDM2/10 or at least with a CDM4/11?
Thanks in advance for the advice and suggestions.
😊
I've recently purchased a non-functioning PCM II to fix (which I've already done with a Cambridge Audio CD2 and an Adcom GCD 575).
The CDP was internally quite bad, full of dust and with an unreassuring appearance.
For this reason, while using good quality capacitors to replace the old ones, I didn't want to overdo it.
I reserve the right to produce photos, perhaps, of the work done and of the characteristics of the model in my possession.
What I want to anticipate is that my PCM II has a CDM2/29 and a related 5886 control pcb.
Another thing I want to underline is that - as well as the Cambridge Audio CD2 - it presents (in some points at least) a clear underestimation of the power handling of the resistors used; this prudently advised me to replace them (even if they weren't burnt yet but quite blackened) with others with better power handling.
In my recovery activity I have to reassemble the boards but first I would like to replace the aged NE5534 which precede the NE5532 in the analog output board; I replaced the latter by inserting the LME49720s in a socket and I would like - logically? - replace the NE5534 with the LME49710.
Then I would check the operation of the laser but I would like to take precautions, in case it doesn't work. In this perspective I recently recovered an old Grundig CD8100 but bad luck wanted it to have a CDM4/25 (probably a more recent model...) instead of the CDM2/29.
Do you think the two laser optics would be interchangeable?
Could I replace the laser optics with a CDM2/10 or at least with a CDM4/11?
Thanks in advance for the advice and suggestions.
😊