TOSHIBA CF3062A -vertical stretch problem


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TOSHIBA CF3062A -vertical stretch problem

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ray
New User

Jan 30, 2003, 11:25 PM

Post #1 of 12 (8052 views)
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TOSHIBA CF3062A -vertical stretch problem	Can't Post

Hi ....

I have TOSHIBA CF3062A TV which is around 10 years old.Its picture is vertically stretched.

I have searched news groups, most of which recommend to replace capacitors C301,C305 and C308

I could find C305 and C308. But I am unable to find C301.

If any have any idea where this capacitor is located?

All help in this regard is appreciated.

Thanks

ray

Alan
TV Repair Authority

Jan 31, 2003, 3:31 PM

Post #2 of 12 (8030 views)
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Re: [ray] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

I got this from another Forum:
"Change C301 & C305=1uf or 2.2uf, 50v both are red
colored or brown colored Elna brand radial electrolytic
capacitors, one is located near the color processor and one near IC301=AN5515
or 21=vertical output IC."
Alan

shadetree
Veteran

Aug 14, 2004, 12:17 AM

Post #3 of 12 (7606 views)
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Re: [ray] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

just look for small redded brown cap only two in set

mlogan32
New User

Sep 9, 2004, 11:09 PM

Post #4 of 12 (7434 views)
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Re: [ray] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

Hey Everyone-

I have a Toshiba CX3285A with TAC 9043 chassis manufactured in 1991. I had a vertical deflection problem (cone heading and/or stretching of vertical). I ended up replacing and/or upgrading the following components:

***Please note… I am giving simplified instructions for the beginner hobbyist.***

*** C stands for Capacitor, such as Capacitor C345***

*** uF stands for micro farads, commonly referred to a MFD; such as 100mfd ***

C345 was 100uf 35V upgraded to 100uF 50V

C305 was 1uF 50V upgraded to 1uF 250V

C342 was 1uF 50V upgraded to 1uF 250V

C308 was 220uF 35V upgraded to 220uF 50V

C330 is 10uF 50V replaced with new 10uF 50V

C342 was the toasted component; but while you have the main board removed, for an extra $3.00 go ahead and replace all of these components.

If you cannot find 1uF (250V) radial caps; use the next lowest voltage. Anything over a 1uF 63V will work, but the higher voltage rating the better, since these fry quite often at 50V.

Also, I had spent another hour or so troubleshooting this set after all of the mods were made because I still had deflection. I was looking for another cap which may have been bad, but everything was fine. It turned out to be improper labling on the packages. My local supplier sells radial capacitors by NTE. These parts were marked on the package as 1uF 250V when inside they were actually 2.2uF 250V. I went to the supplier to get replacements and the whole lot was the same, so double check. It was partly my fault for not looking on the cap when I installed them, instead relying on the manufacturer to supply the right product. So words of wisdom are to always double check on the component level and never trust the packaging.

As for removing the anode (big suction cup on tube), you don’t need to. Just remove the three screws holding the two circuit board carriers together and then slide the main board out after disconnecting the cabling and the two front screws holding them to the base.

purplepimp
New User

Feb 20, 2006, 6:00 PM

Post #5 of 12 (5658 views)
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Re: [ray] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

I recently had the same model Toshiba 32" that had the same problem. I searched google for info and landed on this site. A few users on this thread recommended a capacitor problem and said there where 5 possible caps that could be the problem. I had never done any tv repair let alone circuit board soldering. But what the heck I tried what they recommended and The problem was fixed. The process took me about 1 hour from start to finish. Once you locate the bad caps on the circuit board (if you know what numbers they are) it goes pretty smooth. now granted I feel like a pretty handy guy but it was great spending only around $6 for this fix. I was quoted around $300 for the repair at a local shop. Smile

(This post was edited by pirplepimp on Feb 20, 2006, 6:02 PM)

tvdude
New User

Feb 20, 2006, 9:56 PM

Post #6 of 12 (5644 views)
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Re: [purplepimp] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

Couldnt help but respond to the post, $300 for vertical section repair!!! thats what gives us tv repair people a bad name. Had you not been a resouceful person, you would have probably just replaced. I'm sure there tons of fine tvs that filling up the landfill that could be repaired for little cost. no way it should cost more than $100 to repair even if it were the module and a few other components, and a good tv man could knock it out in less than 90 min.

vodskies
New User

Apr 14, 2006, 9:02 PM

Post #7 of 12 (5436 views)
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Re: [tvdude] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

I am having the same vertical stretch problem. Pulled the appropriate caps and when I went to Rat Shack, I could only find non-polarized caps. Can I still use them, or do they have to be polarized?

tvdude
New User

Apr 15, 2006, 2:53 AM

Post #8 of 12 (5428 views)
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Re: [vodskies] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

polarized would be best, to prevent smoke.

vodskies
New User

Apr 30, 2006, 5:53 AM

Post #9 of 12 (5378 views)
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Re: TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

Alright, I just replaced C305, C308, C330, and C342. My TV still looks exactly like it did before. My radio shack only has a limited amount of caps. My question is, is there a good chance that if I replace C345 it will be fixed? Cuz with shipping and all that crap it's about $10. I just don't want to waist my money if this one cap won't fix my problem.

techchris
Veteran

Apr 30, 2006, 9:16 AM

Post #10 of 12 (4829 views)
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Re: [vodskies] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

toshiba usually use a ramp generator ic separate from the jungle ic. the cap that goes faulty is the one that decouples the vertical drive o/p pin on the generator ic. the position number depends on the model but from memory its normally about 2mF electrolytic.

rrobor
Veteran

May 3, 2006, 9:06 AM

Post #11 of 12 (4801 views)
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Re: [mlogan32] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

A little knowledge is a dangerious thing. To suggest changing a capacitor rated at 50V with one rated at 250V suggests the writer does not know the physics of his subject. An electrolytic forms a layer of oxide insulation due to current flow. So the manufacturer designs a capacitor around the tolerances specified on the package. By using a 250V cap with 40V on it you will not maintain its "form" and it will be less safe than the one specified, it will also drop its capacitance. If you believe a capacitor is under rated say a 50V go to 63V do not go in evcess of 50%

fallagersky
New User

May 11, 2006, 1:02 PM

Post #12 of 12 (4764 views)
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Re: [ray] TOSHIBA CF3062A -vertical stretch problem [In reply to]	Can't Post

great fix, I replaced c305,c308 and C301 which was c342 on my board. Tv is working great.

thanks

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