Channel Master CM-7000PAL HD DVR - AKA Dish DTVPal - Page 27 - AVS Forum | Home Theater Discussions And Reviews
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post #781 of 800 Old 11-07-2016, 04:40 PM
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Quote:
Originally Posted by P Smith View Post
Just to enlighten our newbie, sragan5,
we had for many years main thread about the model - TR-50 aka dvtpalDVR aka CM7000pal DVR what is full of info accrued by "elite" members the forum and owners of the DVR;
you will find there everything what you must and should know and much more technical info;
reading that will avoid posting well known long time ago relevant info and allow you avoid mistake and posting some guesses.

And BTW, pitching sales of a competitor's device is not nice - there are dedicated thread, so if you want to show alternative solution, posting URL to that thread would be recognized as good manner
First, many, many thanks to P Smith and many others for lots of help in keeping my CM7000PAL "working" for the past 8 years. You can't beat the price, but you get (less than) what you pay for. This years DST ordeal, along with a lower price on a "competitors device" is putting my PAL behind me. I will now be hanging out over at the TiVo Roamio OTA DVR thread. I hope my good manners pleases P Smith

Thanks again guys, it was "fun" while it lasted.

BTW, I will have a PAL for sale as soon as I complete the change over. All original, opened once for cleaning (it didn't need it).
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post #782 of 800 Old 11-07-2016, 07:26 PM
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Wow! Eight years is a pretty good run for just about any consumer electronic device - and it's still working! (Including the bugs, unfortunately.) But wait - that puts you back to 2008. I didn't think CM picked up the "Pal" line that early - thought it was still a DTVPal back then.

Personally, I've mostly moved to CM's new DVR+, but my wife still uses her Pal.
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post #783 of 800 Old 03-22-2017, 01:31 PM
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CM-7000 Freezing

We own two CM-7000 DVRs bought in 2010. One always has and still does work perfectly (well, except for the well known DST problem). The other DVR has started to freeze/hang every so often -- everything on-screen is locked, and the remote control has no effect. As far as I can tell, when this happens, all I can do to regain control is to reboot via the remote control (long push of the power button). At first this freezing seemed to happen during playback, but now I see that it will occur even while just using the tuner. Is this is known problem? Is their a fix?
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post #784 of 800 Old 03-22-2017, 02:36 PM
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Probably a bad electrolytic capacitor (usually C34 IIRC). Open the case and check the circuit boards for bulging capacitors.
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post #785 of 800 Old 03-23-2017, 12:01 AM
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Originally Posted by JHBrandt View Post
Probably a bad electrolytic capacitor (usually C34 IIRC). Open the case and check the circuit boards for bulging capacitors.
and many more details about this in main DTV pal DVR thread
The Official AVS Dish DTVPal DVR Topic!

Last edited by P Smith; 03-23-2017 at 01:22 AM.
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post #786 of 800 Old 03-23-2017, 05:50 AM
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Originally Posted by JHBrandt View Post
Probably a bad electrolytic capacitor (usually C34 IIRC). Open the case and check the circuit boards for bulging capacitors.
Is there a service manual generally available for this device? Unless there is clear silk screening on the board, I would not know how to identify C34. As you recommend, I can look for bulging electrolytics, but if C34 is a known culprit, I'd like to study it ~especially~ carefully.
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post #787 of 800 Old 03-23-2017, 05:58 AM
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Originally Posted by P Smith View Post
and many more details about this in main DTV pal DVR thread
The Official AVS Dish DTVPal DVR Topic!

Actually I thought that this ~was~ the main thread! Thanks for the tip. I don't know what the best search string might be -- electrolytics? bulging caps? freezing? If you have any hints on this, please pass them along. Thanks again.

John
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post #788 of 800 Old 03-23-2017, 05:58 AM
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Quote:
Originally Posted by J-D-H View Post
Is there a service manual generally available for this device? Unless there is clear silk screening on the board, I would not know how to identify C34. As you recommend, I can look for bulging electrolytics, but if C34 is a known culprit, I'd like to study it ~especially~ carefully.
if you would follow my advise above, you'll find pictures of PCBs, capacitors, silk screen and much more
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post #789 of 800 Old 03-23-2017, 06:03 AM
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Originally Posted by P Smith View Post
if you would follow my advise above, you'll find pictures of PCBs, capacitors, silk screen and much more
Okay, will do. I'll see if I can find the location of C34 there.
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post #790 of 800 Old 03-23-2017, 07:19 AM
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Yeah, the same device was sold under two different brand names. The DTVPal brand is older so most of the best info is over there.

Here's a post from the DTVPal thread to get you started:
Quote:
Originally Posted by happy2Lurk View Post
fatherom, I don't know about, "the most up to date" but here are some posts I bookmarked ...

- cap list
- repair / pics
- check under shields
- Have you tried a new C34

Read around the above and maybe you'll find what you need - good luck
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post #791 of 800 Old 03-24-2017, 09:41 AM
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Okay, will do. I'll see if I can find the location of C34 there.
Also, you must check other capacitors inside CPU's can.
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post #792 of 800 Old 03-24-2017, 10:10 AM
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Originally Posted by JHBrandt View Post
Yeah, the same device was sold under two different brand names. The DTVPal brand is older so most of the best info is over there.

Here's a post from the DTVPal thread to get you started:
Thanks for these -- I can see I have some sleuthing to do!

BTW, from what I know about cheap Chinese electrolytic caps, they can be bad without showing the symptom of a bulging end cap. I'm not enthusiastic about replacing every electrolytic cap in the box, so I'll start by trying to replace the bulging caps, C34 (whether it is bulging or not), and hope that these steps fix the thing.

John
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post #793 of 800 Old 03-24-2017, 10:14 AM
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Originally Posted by P Smith View Post
Also, you must check other capacitors inside CPU's can.
Not sure about the taller cap, but the shorter one looks like it's bulging. By any chance, are you implying that this one is C34?
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post #794 of 800 Old 03-24-2017, 10:18 AM
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nope, C34 is near DC connector(between main PCB and PS PCB) - see main TR-50 thread's pictures
if you will use ESR meter, no need to un-solder the capacitors to check its parameters
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post #795 of 800 Old 03-24-2017, 11:09 AM
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Originally Posted by J-D-H View Post
Thanks for these -- I can see I have some sleuthing to do!

BTW, from what I know about cheap Chinese electrolytic caps, they can be bad without showing the symptom of a bulging end cap. I'm not enthusiastic about replacing every electrolytic cap in the box, so I'll start by trying to replace the bulging caps, C34 (whether it is bulging or not), and hope that these steps fix the thing.

John
That's pretty much what I'd do: replace any that are bulging along with C242 (under the RF shield) and C34 (out in the open):
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Originally Posted by Bill Conlon View Post
Thanks. Under the RF shield, C242 is bulging. I will replace it and report back.
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Originally Posted by ed_in_tx View Post
I would suggest to go ahead and replace C34 while in it. That's the one that failed in mine. See attached picture.

I'm replacing both C242 and C34 in my 'Pal DVRs. They seem to be the regular culprits.
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post #796 of 800 Old 03-25-2017, 09:50 AM
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Originally Posted by JHBrandt View Post
That's pretty much what I'd do: replace any that are bulging along with C242 (under the RF shield) and C34 (out in the open):
Are these PC boards silk screened with component ID nomenclature?
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post #797 of 800 Old 03-25-2017, 09:55 AM
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Originally Posted by P Smith View Post
nope, C34 is near DC connector(between main PCB and PS PCB) - see main TR-50 thread's pictures
if you will use ESR meter, no need to un-solder the capacitors to check its parameters
What do you mean by "TR-50"?

Without knowing the schematic, I would ordinarily be leery of making any in-circuit capacitor measurements. However if all nodes are known to be high impedance, then maybe that's another story........
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post #798 of 800 Old 03-25-2017, 10:40 AM
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I'll shut my mouth now. We're doing cycles and re-posting what was already known.

Everything already posted in other big [huge!] thread.
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post #799 of 800 Old 03-26-2017, 04:18 PM
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Quote:
Originally Posted by J-D-H View Post
Are these PC boards silk screened with component ID nomenclature?
Yes they are.
Quote:
Originally Posted by J-D-H View Post
What do you mean by "TR-50"?
TR-50 was Dish's original name for the DTVPal, before it became the CM-7000Pal.
Quote:
Originally Posted by P Smith View Post
Everything already posted in other big [huge!] thread.
And JDH, you may want to check the DTVPal thread to learn how to open the case. It can be quite a challenge!
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post #800 of 800 Old 03-27-2017, 07:43 AM
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Yes they are.
TR-50 was Dish's original name for the DTVPal, before it became the CM-7000Pal.
And JDH, you may want to check the DTVPal thread to learn how to open the case. It can be quite a challenge!
I finally found some photos which showed that what you said seems very true -- opening the box looks like a chore! Once inside, at least the silk screening will help me locate the primary suspects, those electrolytic caps.

Thanks for this additional information. For that matter, thanks for your forgiveness of those of us who have not read every single word, every single post, in the several threads pertaining to the CM-7000 (or whatever name it might go under). I would like to attempt to repair my DVR, but frankly it is not my life's work. The amount of information on this device available in several places within the AVS Forum is daunting to the newcomer! Thanks again for your advise.
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