I have a Series 3 OLED (TCD648250B) and at least one of the capacitors (C701) on the power supply is visibly leaking (see attached Attachment 19993
) and I'm in need of some help/advice on how best to fix it.
Pretty sure C701 has looked that way for several months at least (quite possibly much longer)... I say that because I remember finding it several months ago and making a mental note to look into fixing it. Unfortunately a "mental note" wasn't good enough and I forgot about it. My TiVo decided to remind me by starting a "continuous reboot" cycle. :( Soo... I guess it's time to fix it, but I have a few questions first...
C701 appears to be the only bad one... I've done a visual inspection (several times) and none of the other caps in the power supply "look" bad... no leaking, no bulging (even subtle), no discoloration. I realize that's no guarantee they're good... just saying none of the others show any obvious
signs of damage.
This post (http://www.tivocommunity.com/tivo-vb...93#post9131293
) lists the specific caps for my model (TCD648250B). What I'm not sure about is should I replace just C701 or should I replace some/all of the others? The person (schoolbus) who posted that list said C401/C402 were visibly bad on his S3, but he went ahead and replaced 11 of the 15. Why not replace just C401/C402? Why replace only 11/15? Why THOSE
Also, schoolbus's post says it was for:
TiVo S3 OLED capacitor list:
3Y power supply: CP-1104 R2
TiVo PN: SPWR-00008-000 Rev A3
Mine is actually slightly older I believe - CP-1104 and SPWR-00008-000 Rev A2. Are those sufficiently equal in terms of the caps to use?
I also found a nice link somewhere to a project on Mouser Electronics for each of those 11 caps (https://www.mouser.com/ProjectManage...sID=1a42eea4c1
). This will be very helpful once I decide which caps I
So... how does one decide which ones to replace? Skill level? Confidence in making the repair? Specific symptoms? History of the TiVo? Age of the Tivo? Random guessing?
As for my skill/confidence level... well, I'd say my confidence is considerably higher then my actual skill. I'm more then willing to give it a go, but it's been quite a number of years since I've done ANY
sort of circuit board soldering (probably high school 35 years ago) and even then it was only the most basic. None then less I'm quite sure I can do it... probably a bit more sure then I should be. :)
If specific symptoms might help narrow down which caps to replace, I'll be happy to go into more detail. Suffice it to say at this point, I'm fairly confident the continuous reboot is not DIRECTLY
related to the power supply/bad cap. I'm pretty sure the rebooting issue is corrupted software. Could a bad cap cause software corruption without damaging the hard drive?
The S3 was originally purchased back in Oct 2006 with lifetime service (transferred from an S1) and does have a little history in terms of drive replacement and upgrades that I won't go into unless it will be helpful. It's been running pretty much continuously since then.
Given my over-confidence and lack of skill, it would probably be best just to replace C701, but if there's good reason to replace others, I'll do it.
As for tools... I have:
- a basic soldering iron with low/high setting (Ungar UTC SS - looks just like this one http://www.esssales.com/images/graym...ungar/1800.jpg)
- a couple soldering tips (the smallest is about the size of a ball point pen)
- a couple different types of solder
- a small tub of Kester Rosin Paste Flux (SP-44)
- desoldering pump (Ungar 7874B)
- a magnifying glass/light gizmo thingy with little holding clamps :)
Are those tools sufficient for the job?
How hot should the iron be... I guess I'm limited to "low" or "high". :)
Should I get a smaller iron tip?
I've watched one youtube video about replacing a cap in a tivo power supply and I'll poke around for some others. I also plan to take the power supply out of an old DirecTV receiver that's destined for the recycle yard and do some practice desoldering and soldering.
Anything else I should need?
Thanks for any help/suggestions.