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Tivo Series 3 - Bad capacitors in power supply

Discussion in 'TiVo Help Center' started by johnsom, Jul 25, 2011.

  1. dianebrat

    dianebrat I refuse to accept your reality TCF Club

    10,123
    79
    Jul 6, 2002
    boston'ish
    is it also the ONLY one of that manufacturer? (hint, look at the pattern of the lines on the top, each mfr uses their own style) If there are more from that mfr I'd replace all the larger ones of that grouping. bulging is the end of the road, they can be NG far before that.
     
  2. Hi8

    Hi8 TiVoPro - wanabe!

    192
    0
    Mar 6, 2002
    I'll check... However this was the problem with my channels that disappeared!

    I swapped power supplies with my known good working TiVo and all my channels are back!

    As soon as my capacitors arrive, I'll replace them.


    Sent from my iPad using Tapatalk HD
     
  3. HerronScott

    HerronScott Well-Known Member

    2,779
    27
    Jan 1, 2002
    Staunton, VA
    I replaced the following when my S3 OLED had capacitor issues just to be safe and hopefully not have to deal with any additional failures.

    http://www.tivocommunity.com/tivo-vb/showthread.php?p=9131293#post9131293

    Scott
     
  4. keytohwy

    keytohwy New Member

    16
    0
    May 14, 2006
    Thanks for the replies. I didn't want to end up buying a bunch of stuff I will only use once, so I didn't. The solder, soldering iron and caps were about all I wanted to spend. Much more than that, and I'm getting a new box.

    I'm still limping on one channel recording for now. I'll give it a few more days in case anyone knows someone near me that can do the work for a 6 pack or something.



     
  5. Aug 8, 2013 #205 of 532
    startledmarmot

    startledmarmot New Member

    1
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    Aug 8, 2013
    Hey everyone. Dealing with an OLED S3 here that is in the "normal" reboot cycle - it goes all the way through the "Almost there..." screen, then just before the THX it reboots.

    Popped the lid for the first time and (aside from a serious case of the dust bunnies) saw the 2200uF 25v cap was bulging, so I replaced it. All the others looked fine, but I know looks can be deceiving.

    I've checked the output voltages on the yellow/red/gray/orange and everything looks right. Yellow holds steady at +12.12v, others at +5, +7, etc...

    This led me to think the power supply might not be the problem. But after running all the kickstart tests, my HD also seems fine. Just to be sure I backed it up, imaged a new HD from that backup, then swapped in the new one... but the problem remains the same. Removed every cable from the back and all CableCards to rule out anything from those.

    Anybody have any ideas of where to go from here? My multimeter unfortunately won't read uF - so I could just replace every cap (or source a new PS), but that feels slightly brute-force-ish. Would love to know what's up... this little guy has been a part of the family since before I met my wife, and she may love him as much as me! ;)
     
  6. Aug 8, 2013 #206 of 532
    dianebrat

    dianebrat I refuse to accept your reality TCF Club

    10,123
    79
    Jul 6, 2002
    boston'ish
    Yes, see above..
     
  7. Aug 8, 2013 #207 of 532
    steve614

    steve614 what ru lookin at?

    10,722
    0
    May 1, 2006
    Dallas, TX
    One thing you might try, even if it gets you nowhere:
    Take the new HDD and put a fresh image on it. Might be able to find the image here.
    http://www.tivocommunity.com/tivo-vb/showthread.php?t=388695

    That way you can rule out corrupted software.
    Otherwise there is a strong possibility that other caps are bad on that PS, even though they show no outward signs.
     
  8. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    If he's getting good steady readings with the voltmeter and they're within a tenth of a volt or two of what they're supposed to be, then the power supply is probably okay (although you'd need an oscilloscope to absolutely rule out any AC ripple on those DC lines).

    At this point I'd try a fresh image load on a known good drive as an experiment.
     
  9. nooneuknow

    nooneuknow TiVo User Since 2007

    3,554
    0
    Feb 5, 2011
    Cox Cable...
    Although I own a combo meter/oscilloscope, I've found that simply measuring DC circuits with a regular meter on the AC setting, will give you an indication of ripple. There should be close to no AC voltage on a DC circuit. So, there's the "poor man's" alternative. YMMV.

    I used to know the thresholds by memory, but don't recall them at this time.
     
  10. scottndsky

    scottndsky New Member

    7
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    Jan 7, 2010
    I just wanted to add that I fixed my power supply with the following nine capacitors from Digikey:

    QTY=5,P14382-ND,CAP ALUM 2200UF 10V 20% RADIAL,0.94000,$4.70
    QTY=1,P13119-ND,CAP ALUM 1000UF 16V 20% RADIAL,0.67000,$0.67
    QTY=2,P14378-ND,CAP ALUM 1000UF 10V 20% RADIAL,0.61000,$1.22
    QTY=1,P14394-ND,CAP ALUM 470UF 16V 20% RADIAL,0.49000,$0.49

    Grand Total = $7.08

    I was a little puzzled afterward because the power supply continued the little clicking noise after I powered it on without the motherboard (load) connected. However, once I installed the power supply and connected the motherboard everything power up just fine and the clicking noise went away entirely.

    I'm quite please with this inexpensive fix! Thanks to everyone on the board who contributed to this.

    Scott
     
  11. nooneuknow

    nooneuknow TiVo User Since 2007

    3,554
    0
    Feb 5, 2011
    Cox Cable...
    Yeah, it doesn't get stated very often, but the TiVo power supplies require a load. They -could- even sustain damage if not under the minimal load requirements. This is highly unlikely, but still possible...

    I even run into an occasional issue with computer power supplies having erratic voltages on some outputs, due to the minimum load not being met on one or more of the other outputs. A few years ago, most computer power supplies started including the minimum load (inside the manual/literature). The old-school (over 20 years ago) way of dealing with this was them putting huge ceramic resistors inside, thus making sure the minimums were there, and powering it up without a load wouldn't cause instant self-destruction. It's not a very "green" way of doing things, though. ;) Good to hear another DIY success story! :)
     
  12. squint

    squint New Member

    846
    0
    Jun 15, 2008
    I replaced all 13 capacitors in my Tivo HD's power supply yesterday. After I was finished, I got a better look at the writing on the old capacitors and took some physical measurements.

    Code:
    3BS0158312GP
    						dia	ht
    C120	470 uF	200V	CapXon KF C731		20.28	45.35
    C220	47 uF 	50V	CapXon KF P664		6.42	11.51
    C227	10 uF	25V	CapXon KF C729		5.17	11.53
    C306	2.2 uF	50V	CapXon KF C730		5.17	11.31
    C401	empty
    C402	2200 uF	10V	OST RLS	O726/O728	10.21	24.69
    C403	1000 uF	10V	CapXon KF C729		10.24	16.57*
    C407	2200 uF	10V	OST RLS	O726/O728	10.19	24.66
    C501	2200 uF	10V	OST RLS	O726/O728	10.24	24.66
    C502	2200 uF	10V	OST RLS	O726/O728	10.23	24.65
    C503	1000 uF	10V	CapXon KF C729		10.17	15.83
    C504	2200 uF	10V	OST RLS	O726/O728	10.19	24.94
    C701	1000 uF	16V	OST RLS O726/O728	10.18	15.74
    C702	470 uF	16V	CapXon KF C722		8.17	20.16
    
    * bulged
     
  13. unitron

    unitron Active Member

    16,387
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    Apr 28, 2006
    semi-coastal NC
    Didn't have a ruler that does inches handy, huh?

    :D
     
  14. Jan 1, 2014 #214 of 532
    Pittspilot1

    Pittspilot1 New Member

    1
    0
    Jan 1, 2014
    I took the advice on the forum and replaced all the capacitors on my Series 3 TiVo. I had been having the same issue others had with the TiVo being stuck on the "Welcome, Powering on..." screen.

    I've attached the order form from Digi-Key with the part number of all the capacitors I bought. The largest one (P6821-ND) is the only one I ended up not replacing, although I bought it. It was a "snap" fitting which I guess is designed to be slightly different attach fitting than all the others which just had long wires.

    As such, I didn't want to risk replacing the original one since it seemed to still be ok (no raised top). I replaced all the other ones though. I made sure to line up the capacitors with the correct polarity.

    I remounted the power supply into the chassis and fired it up. IT WORKED!!

    Very cool to have fixed my TiVo with the lifetime service and I'm now good to go again.

    Thanks to the forum for the great advice.

    Darren
     

    Attached Files:

  15. Jan 1, 2014 #215 of 532
    squint

    squint New Member

    846
    0
    Jun 15, 2008
    From your order screenshot, it seems like you ordered the "SNAP" style of that capacitor rather than the radial.
     
  16. Jan 1, 2014 #216 of 532
    unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC

    Glad to hear of your success.

    As I have pointed out previously and elsewhere, the biggest cap, rated at 200V, is just there to filter the ripple out of the 120V AC that gets converted to DC.

    It only has to deal with having current rush in and out of it 60 to 120 times per second, and isn't likely to have anything wrong with it.

    It's the slightly smaller caps around the heat sink(s), which have to deal with current changes of thousands of times per second, which are subject to the stresses under which capacitors with the bad "secret sauce" (which is responsible for "capacitor plague") tend to go bad years before they should.
     
  17. Jan 6, 2014 #217 of 532
    jbernardis

    jbernardis New Member

    1,072
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    Oct 21, 2003
    Princeton NJ
    My S3 OLED has been acting up lately. First it was network issues, then we'd wake up in the morning to find a frozen picture, or no sound, and reboots were taking successively longer and longer. I opened it up and found two obviously bulging capacitors (2200uf 16V and 2200uf 25v). I just ordered a complete set from digikey for under $10, and while I was there, I also ordered another set for my other S3 which is exactly the same age. I'm hoping it makes my problems go away, but for $10 and about 30 minutes of my time, its a worthwhile gamble.

    I'll let you know how it goes.
     
  18. Jan 7, 2014 #218 of 532
    unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    When you say "other" S3, is it also a 648?

    Because if it's a 652, that cap list isn't going to be exactly the same.

    Also, if it's a 652, you need to open it up to see which model 652/658 supply it is, since there are two possibilities (both of which differ from the 648 supply).

    Of course if both are 648's you could swap the supplies and be sure that a bad supply is the only cause of your problems.
     
  19. Jan 9, 2014 #219 of 532
    CraigK

    CraigK (unspecified)

    1,255
    7
    Jun 9, 2006
    North of...
    TiVo HD TCD652 - Power Supply - 3Y Power Technology P/N:3BS0158312GP REV:1

    Capacitor locations:

    [​IMG]


    This is a partial parts list with Digi-Key part number posted by wobly HERE

    C501 10V 2200uf RLS 0720 P15323CT-ND EEU-FR1A222LB
    C502 10V 2200uf RLS 0720 P15323CT-ND EEU-FR1A222LB
    C504 10V 2200uf RLS 0720 P15323CT-ND EEU-FR1A222LB

    C701 16V 1000uf RLS 0730 P13119-ND EEU-EB1C102

    C403 10V 1000uf RLS 0736 P14378-ND EEU-FR1A102L
    C503 10V 1000uf RLS 0736 P14378-ND EEU-FR1A102L

    C702 16V 470uf RLK 0736 P14394-ND EEU-FR1C471

    C120 200V 470uf 1189-1197-ND 200TXW470MEFC18X40

    C402 10V 2200uf RLS 0732 P15323CT-ND EEU-FR1A222LB
    C407 10V 2200uf RLS 0732 P15323CT-ND EEU-FR1A222LB
     
  20. Jan 9, 2014 #220 of 532
    CraigK

    CraigK (unspecified)

    1,255
    7
    Jun 9, 2006
    North of...
    TiVo HD TCD652 - Power Supply - AcBel Model ST7002-BW0G Rev:A

    Capacitor locations

    [​IMG]


    This is a partial parts list with Digi-Key part number posted by HerronScott HERE

    C14 2200uF 16V Panasonic EEU-FR1C222 P14402-ND $1.01
    C27 2200uF 16V Panasonic EEU-FR1C222 P14402-ND $1.01
    C17 2200uF 16V Panasonic EEU-FR1C222 P14402-ND $1.01
    C31 1000uF 16V Panasonic EEU-FR1C102L P14397-ND $0.71

    C15 1000uF 6.3V Panasonic EEU-FM0J102 P12340-ND $0.51
    C20 470uF 16V Panasonic EEU-FR1C471 P14383-ND $0.49 (Alternate: P15342CT-ND?)
     

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