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Old 05-03-2014, 09:55 PM   #1
smpowell
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Series 2 power supply capacitor list

What capacitors typically go bad in a TCD540080 power supply?

My old Series 2 has been acting a bit off lately and I'd like to order some decent capacitors and just go ahead and change them out. If I just had a list.....

I just spent a couple of hours searching for the answer and figured I'd just break down and ask.

Lately there have been periods of pixelization in recordings; a lot more than ever before.

The Tivo is paired with a Zenith DTT901converter box. I figured I would give it the same treatment also. Except I couldn't find a capacitor list for it either. I could of sworn that I saw one someplace a few years ago!
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Old 05-04-2014, 12:45 AM   #2
unitron
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Without opening up my 540 I can give you a generalized answer--the medium sized ones near the heat sinks.

The very biggest one, the one rated for 200 Volts, doesn't see the high switching frequencies that work the others so hard, and shouldn't need to be worried about.

And the little ones don't see the large currents the others do, so again, shouldn't need to be worried about.
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Old 05-04-2014, 05:34 AM   #3
squint
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I have a TCD540040 and another Tivo HD coming in the mail Monday. Both will have all their power supply capacitors replaced. If you wait a few days, I'll have generated a parts list for the Series 2.
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Old 05-04-2014, 06:23 AM   #4
smpowell
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> If you wait a few days, I'll have generated a parts list for the Series 2.

Thanks, I eagerly await the list.
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Old 05-04-2014, 08:40 AM   #5
moedaman
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Quote:
Originally Posted by squint View Post
I have a TCD540040 and another Tivo HD coming in the mail Monday. Both will have all their power supply capacitors replaced. If you wait a few days, I'll have generated a parts list for the Series 2.
With all of the Series 2 and Series 3 non-lifetimed units out there going for cheap, why not just replace the entire psu and not bother with the tedious job of capacitor replacement? That's what I did when my Series 2 psu went bad. I even got a bigger hdd with the donor unit and increased the recording capacity of my lifetime unit. The donor unit was well worth the $25 I paid for it.
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Old 05-04-2014, 09:04 AM   #6
squint
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Originally Posted by moedaman View Post
With all of the Series 2 and Series 3 non-lifetimed units out there going for cheap, why not just replace the entire psu and not bother with the tedious job of capacitor replacement? That's what I did when my Series 2 psu went bad. I even got a bigger hdd with the donor unit and increased the recording capacity of my lifetime unit. The donor unit was well worth the $25 I paid for it.
The capacitors on a replacement power supply are still ticking time bombs. You don't know how long they're going to last. They may be in worse shape than the capacitors on the power supply they replaced. In an old thread, someone was replacing power supplies every 6 months. Replacing the capacitors with high quality capacitors would likely fix it for well beyond the useful life of the unit.
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Old 05-04-2014, 12:40 PM   #7
smpowell
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Quote:
Originally Posted by moedaman View Post
With all of the Series 2 and Series 3 non-lifetimed units out there going for cheap, why not just replace the entire psu and not bother with the tedious job of capacitor replacement? That's what I did when my Series 2 psu went bad. I even got a bigger hdd with the donor unit and increased the recording capacity of my lifetime unit. The donor unit was well worth the $25 I paid for it.
Like Squint said, I don't know that the capacitors in a donor unit are any better than the the ones that are in it now.

Furthermore, I want to protect the (lifetime) mainboard & drive from what might happen as the old caps to fail. Voltage instability, extra heat, and maybe a big voltage spike when a cap blows.

Once I have a list, I can order some good quality caps and replace them when when it suits my schedule.

>tedious job of capacitor replacement?

Just replacing the big caps that are prone to failure shouldn't be that difficult. I did a lot of soldering back in the 1980's.

Now if I could just find a capacitor list for the converter (Zenith DTT901)........
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Old 05-04-2014, 05:14 PM   #8
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Originally Posted by smpowell View Post
...

Now if I could just find a capacitor list for the converter (Zenith DTT901)........

Are you just looking to get out of having to take it apart and figure out for yourself which are the usual suspects?

Google doesn't seem to turn up much in the way of power supply problems due to "capacitor plague" for that converter.
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Old 05-04-2014, 07:46 PM   #9
smpowell
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Originally Posted by unitron View Post
Are you just looking to get out of having to take it apart and figure out for yourself which are the usual suspects?

Google doesn't seem to turn up much in the way of power supply problems due to "capacitor plague" for that converter.
I'd like to:

1. Cut in half how long the converter/series 2 will be out of service.

2. Cut in half the amount of knee pain involved in crawling around on my hands and knees to access the converter & series 2 on a dusty, hard to reach shelf.

3.Benefit from whatever first hand knowledge others might have.

There have been capacitor failures talked about on the avsforum.com converter forum. And this one has been in continuous operation for 7 years.
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Old 05-07-2014, 06:31 AM   #10
squint
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Tivo TCD540040
AcBel API2ST17-BW0 P1-006
C03E19-0003I
2004.02.12
TiVo P/N: SPWR-00004-001 rev: A3

This is a complete list of all the electrolytic capacitors:

Code:
#	uF	V	Digikey #		price
C4	330	200	493-7338-ND		3.27
C9	68	25	565-3768-ND		0.36
C14	2200	10	493-6967-ND		1.18
C15	470	10	493-12067-1-ND		1.22
C17	2200	10	493-6967-ND		1.18
C20	1000	10	1189-1716-ND		0.52
C23	470	25	P14418-ND		0.71
C26	47	63	1189-1511-ND		0.37
C27	1	50	493-11596-1-ND		0.46
C29	10	50	1189-1883-ND		0.25
C31	1000	16	493-6969-ND		0.97
C34	22	50	P14452-ND		0.33
C35	2.2	50	493-11682-1-ND		0.51
C42	470	10	493-12067-1-ND		1.22
C43	0.47	50	493-11696-1-ND		0.52
If you were to only replace the medium sized capacitors near the heatsink:

C14
C15
C17
C20
C23
C26
C31
C42

You'll need a Torx T-10 screwdriver to open the case and remove the power supply.
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Old 05-11-2014, 05:37 PM   #11
smpowell
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Originally Posted by squint View Post

This is a complete list of all the electrolytic capacitors:
Thanks.
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