| Mike McMahon |
I need to source a new drive mechanism for my Delta 70.2
I think it's the CDM4, but not sure which version or where to source.
Any ideas? |
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| NAP 160 |
| and you can pick up a secound hand marantz for £30 on ebay |
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| Mike McMahon |
This is a great help folks, thanks. I'm now looking for a suitable Marantz player to source the bits I need.
:D |
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| TDA1540 |
Mike,
going for a Marantz with cdm4/19 is not the way to go.
you would do better with a cdm that replaces either the complete cdm,or even the cdm-cum-servoboard.
cdm4/19 only supplies you with a Rafoc. |
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| Fin |
You beat me to it, TDA!
That series of Marantz CDPs all have CDM4/19 which is not a direct replacement for the CDM4/11 - unless you are up for some laser surgery.
It would be easier to look for an older Philips based machine with one of the CDMs that Chlo mentions in the linked threads. Some are reported to be better than the original CDM4/11 - which would be a bonus! |
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| chlo |
Hello,
Try to look for Philips CD371,CD373AH00,CD373AH01,CD471AH00,CD471AH01,CD472,CD473,CD650,CD660,CD670,CD771 or Marantz CD65DX, CD75DX. These players has CDM4/11 or CDM2.
Hope this will help.
Chlo. |
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| jean-paul |
| AFAIK there are Delta 70.2s out there that have CDM 4/36. |
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| Fin |
| quote: | Originally posted by chlo
Hello,
Try to look for Philips CD371,CD373AH00,CD373AH01,CD471AH00,CD471AH01,CD472,CD473,CD650,CD660,CD670,CD771 or Marantz CD65DX, CD75DX. These players has CDM4/11 or CDM2.
Hope this will help.
Chlo. |
Hi Chlo
Which CDM2s have you tried?
Did you encounter any problems with the replacement or did they all just slot in? |
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| Mike McMahon |
You guys are great. You've saved me a lot of heart ache and wasted time and money! Now checking out Philips availability.
Thanks:D |
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| chlo |
Hi Fin,
I tried CDM2/10 & CDM2/29 in ( directly swap).
Chlo. |
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| Fin |
| quote: | Originally posted by chlo
Hi Fin,
I tried CDM2/10 & CDM2/29 in ( directly swap).
Chlo. |
Hi Chlo
Were these much better than the original CDM4/11?
Which CDM2 gave the best result?
Does anyone know what is the best CDM that will possibly fit in this CDP? |
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| chlo |
Hi,
To me CDM2 better than CDM4. These two CDM2 gave me the same results.
Regards,
Chlo |
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| Mike McMahon |
:( Well, I'm searching everywhere, but can't locate a CDM4/11 or CD2 equipped CDP to fix my Arcam Delta. Does anyone out there have a spare???
Ta |
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| chlo |
Hello Mike,
I still have one good condition CDM2/29. How do you know your CDP has problem with CD drive?.
Chlo. |
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| Mike McMahon |
Hi Chlo
Initial problem was failure to load/recognise disks. Now cd motor appears to have failed as well. CDP is 14 years old and has been powered up most of that time. Didn't realise until it failed that the motor and laser are continually powered when the Delta CDP is on!!! Was just trying to keep it warm, but was spinning the motor for all those years!!!
If the CDM2 you have will fit, how much do you want for it? Is the laser output good?
Thanks
;) |
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| chlo |
Hello Mike,
The CDM2 has been recapped, cleaned so it works fine, It has no problem with reading CDR, I do not have any CDRW so I am not sure about it!. I tied it on my Delta CD70.2. I really don't know how much it worth!:confused: . May be some member can evaluate it.
Regards,
Chlo. |
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| Mike McMahon |
Hi Chlo
Thanks. I'll be away from Monday to Saturday, so may not be able to pick up other posts.
My budget's tight, but I'm keen to get some music flowing again! I don't know what it's worth either! If we can agree a price, with help from other members, let's do it!
I thought some more about your question about the CD drive. To be honest, my hobby here is the music rather than the electronics. The Delta 70.2 is the sweetest I've heard (I auditioned a CD92 recently and could not live with it... or afford it!). Arcam and all their dealers tell me it's obsolete and spares are not available... but I am not letting go so easily. If I can ensure I get the drive sorted, pretty much any other problem is more easily sorted.
BTW it sits in a Naim system: 30yr old 250 (bolt down case), 20 yr old 32.5 and Hi-Cap and some original IBL's. It really sings!!!
:) |
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| Mike McMahon |
| Does anyone have a service manual/schematics for the Arcam Delta 70.2? |
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| chlo |
Hi Mike,
Send an email to Arcam tell them you need it for repair purpose, they will send you (free of charge). I obtained one for the amplier last few weeks. I have schematic (Arcam Delta 70.2) for audio boad only.
Chlo |
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| Mike McMahon |
Chlo has been very helpful supplying some spares and advice... thanks. I still have a problem though...
1. CDM 4 motor spins continuously when powered up, even when drawer is open
2. CD's are not recognised
3. Drawer behaviour (open/close) is sometimes irratic (opens part way then closes again)
Here's what I've tried so far...
I replaced the CDM4 with a known working unit, but no change
Arcam suggested checking the 5V rails and the PSU board for cracks. All OK
Arcam also suggested checking the X1 and X2 clocks and the MAB chip on the decoder board. I don't have access to a scope, so I replaced the MAB chip (supplied by Arcam), but no change. I now have a spare chip!
As a precaution I have replaced all the electrolytics on the decoder board (except the 6.8uF one... not sure how critical this value is)
Using the service tests in the Arcam manual, the CDP goes up to service position 3 without a problem, but at 3 it holds for around 10 seconds, then reverts to position 0. This would seem to indicate that the laser is focusing fine, but the CD speed is wrong (or some other logic problem)
I could, of course, replace the 2 crystals at X1 and X2 just in case (though the value of one is a little odd)
Any more ideas?
Thanks for all your help and happy new year! |
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| Mike McMahon |
| Is it OK to start this as a new post? It's gone a bit off-topic from the original:) |
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| Bricolo |
I don't remember who, but a member of this forum recently explained how he repaired his old cdm4 by addind (or changing) a cap at the cdm4's "head"
if Jean-Paul reads us, he may remember more as men maybe he remembers who told this |
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| Mike McMahon |
| quote: | Originally posted by Bricolo
I don't remember who, but a member of this forum recently explained how he repaired his old cdm4 by addind (or changing) a cap at the cdm4's "head"
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Thanks Bricolo. I have swapped out a working CDM4 assembly, including the boards associated with it, so the fault is not here.
Regards
Mike |
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| guido |
Hi,
The 7210 is probably defect. It's in my repair database from the old philips players:
disk turns constantly: 7210 defect, check pen 17 it should have a square-wave signal 0 to 5V at stop position.
One other fault with this symptom is a missing clock, but you checked that already (?).
Regards, |
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| jean-paul |
| quote: | Originally posted by Bricolo
I don't remember who, but a member of this forum recently explained how he repaired his old cdm4 by addind (or changing) a cap at the cdm4's "head"
if Jean-Paul reads us, he may remember more as men maybe he remembers who told this |
That was about the axial 33 uF cap that causes trouble on CDM 2. |
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| Mike McMahon |
Good evening gentlemen. Thanks for your input here...
| quote: | Originally posted by guido
Hi,
The 7210 is probably defect. It's in my repair database from the old philips players:
disk turns constantly: 7210 defect, check pen 17 it should have a square-wave signal 0 to 5V at stop position.
One other fault with this symptom is a missing clock, but you checked that already (?).
Regards, |
I have not been able to check the clock because I don't have access to a scope. Is there any other way to check? Alternatively, which components constitute the clock and would benefit from replacement if I'm unable to check it?
If the clock is OK (or is replaced just in case) and I still have a problem, is there a source for the 7210. Is this a programmable device or a standard replacement?
| quote: | Originally posted by jean-paul
That was about the axial 33 uF cap that causes trouble on CDM 2. |
The working CDM4 has all new caps, including the 33uF axial.
I really do appreciate all your help
Thanks |
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| TDA1540 |
saa7210 defect???
I suppose it is possible.
More likely a clockproblem(as stated above) or a problem in the motordrivecircuit.
Eitherway,you'll need a scope.
Martijn |
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| Mike McMahon |
| quote: | Originally posted by TDA1540
saa7210 defect???
I suppose it is possible.
More likely a clockproblem(as stated above) or a problem in the motordrivecircuit.
Eitherway,you'll need a scope.
Martijn |
Replaement crystals are cheap enough (for X1 and/or X2). Certainly cheaper than a scope. Is it worth replacing these or might the clock problem lie elsewhere? |
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| chlo |
Hi all,
For the Arcam delta 70.2, It's likely the control logic IC 74HCU04 defective?..
Regards,
Chlo |
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| Fin |
| quote: | Originally posted by chlo
Hi all,
For the Arcam delta 70.2, It's likely the control logic IC 74HCU04 defective?..
Regards,
Chlo |
Hi Chlo
I'm thinking of removing this 74HCU04 :whazzat:
If the clock is replaced (as you did) - 3 of the 6 inverters are disabled. Then if the SPDIF is disabled - another inverter and half of the 74HC74 can be disabled - which should reduce jitter. Also, I'm planning to use a Tent XO2 which has 3 outputs - one of which can replace the inverter going to the filter. That just leaves one inverter in use for BCK to the DAC. I don't think this is required - especially if WS and DATA are also reclocked.
What do you think? |
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| Mike McMahon |
| quote: | Originally posted by chlo
Hi all,
For the Arcam delta 70.2, It's likely the control logic IC 74HCU04 defective?..
Regards,
Chlo |
Thanks Chlo. RS have these in stock, but only sell in multiples of 20. Anyone got spares?
I have also moved my attention to the audio board following Chlo's comments about the chip on that board being the potential culprit. The board offers various voltage test points, inluding a +11V rail at the back of the board. This point reads arond -4v. Any thoughts? |
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| guido |
| quote: | Originally posted by TDA1540
saa7210 defect???
I suppose it is possible.
More likely a clockproblem(as stated above) or a problem in the motordrivecircuit.
Eitherway,you'll need a scope.
Martijn |
It is not possible, it is likely. The euras database is made up with the most found faults in the players. So it is a repair manual for dummies: e.g. if machine 'x' does 'y', replace resistor 'z'.
For a constant spinning disk-motor it is the 7210 as most found problem in more than one machine (if the disk-motor is spinning in the opposite direction, it is the motor driver's mass connection not being there btw).
Handy stuff, allthough laser worn out is not in the book.
Not the most found fault in those days :D
Regards, |
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| TDA1540 |
| quote: | | CD371,CD373AH00,CD373AH01,CD471AH00,CD471AH01,CD472,CD473,CD650,CD660,CD670,CD771 or Marantz CD65DX, CD75DX. These players has CDM4/11 or CDM2 |
I opened up a cd473/30. It has a cdm4/19.
(the 473/00 I have,is fitted with a cdm2) |
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