Toshiba problem.


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Toshiba problem.

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Scrat
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Oct 4, 2010, 3:54 AM

Post #1 of 33 (3014 views)
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Toshiba problem.	Can't Post

I really hope someone here can help me figure out this problem with my Toshiba 36" TV. Model 3X35F60.

The TV will be fine one minute then suddenly it will shut down and the red power indicator light which is normally steady begins to blink. Sometimes the TV would come back on of its own accord sometimes it would after turning it off for a few minutes. As of yesterday it will not come on at all and after blinking for a few minutes it shuts itself off completely.

Any ideas? Your input will be greatly appreciated as I don't have the money for a new set now. Thanx all.

jts1957
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Oct 4, 2010, 8:55 PM

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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Care to try that AGAIN!

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Toshiba problem.
1 post - 1 author - Last post: 12 hours ago
Model 3X35F60. The TV will be fine one minute then suddenly it will shut down and the red power indicator light which is normally steady ...
www.tv-forums.com/forum/TV.../Toshiba_problem.__P85106/ - Cached

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Scrat
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Oct 4, 2010, 10:58 PM

Post #3 of 33 (2994 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

 My bad. Model number is CX35F60. That's what you get for reading fine print in the dark. <br>

Anyway Jts do you think this could be a tube problem? I'm a HVAC tech so this is not so foreign to me although electronics are a component I'll replace and toss in the trash. I have very little experience repairing/troubleshooting electronic components. I also seem to have good luck with TVs therefore never had to repair one.

(This post was edited by Scrat on Oct 4, 2010, 11:21 PM)

Scrat
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Oct 5, 2010, 4:39 AM

Post #4 of 33 (2986 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

*&^()%^#@%$!!!! I just had the back off again and I cleaned it up a little. Just for kicks I plugged it in and it is now working fine. Tongue

jts1957
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Oct 5, 2010, 7:36 AM

Post #5 of 33 (2984 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Dang! And just when I almost found the service literature.

Bad solder joints around heavy components (flybacks, transformers), thick leaded parts, 1 watt and larger resistors, for example, any part that's mounted to a heat sink. Unimpressed

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Scrat
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Oct 7, 2010, 6:03 AM

Post #6 of 33 (2973 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

 Okay JTS, I'll take out the main board and check out the connections and stuff. What is a flyback? <br>

It's back to doing the same thing, last night it went all evening with no problems, now nothing. Just the blinking red light and it shuts off.

Would pics help?

(This post was edited by Scrat on Oct 7, 2010, 6:06 AM)

Scrat
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Oct 9, 2010, 5:49 PM

Post #7 of 33 (2964 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

I got access to the board, the big one on the bottom and the rest. I see no obvious defects in the soldering or wiring. I'll put up some pics later today. I need to disconnect the tube from the main board but the cable doesn't want to cooperate and I don't know if the tube still holds a charge. I am assuming it is. Should it just pull off?

jts1957
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Oct 9, 2010, 7:06 PM

Post #8 of 33 (2960 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Slides left and right PERPENDICULAR to red wire.
See: http://www.crtsolutions.com/CRTSafety.pdf

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Scrat
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Oct 9, 2010, 8:46 PM

Post #9 of 33 (2956 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

Thanx I'll try to get the pics up today. No guarantees though I have a house full of ladies this weekend. Maybe I'll just go dig a hole and fall into it. Wink

Scrat
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Oct 10, 2010, 4:01 AM

Post #10 of 33 (2945 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

First picture. This is the main board that sits on the bottom. I know what the heatsinks are and what they do, there is also a small transformer next to the white block and it the left corner is the on off switch. The large red wire is from the anode on the tube. What does the black thing its attached to do? It can be adjusted evidently. I'm going to go check out your link and see what I can find JTS.

jts1957
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Oct 10, 2010, 11:26 AM

Post #11 of 33 (2941 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Main filter electrolytic has been subjected to so much heat that the shrink tubing on its outside has shrunken excessively. I'd at least pull and check value and ESR.
Connector shown unplugged is by you, I presume?
Black "thing" is flyback transformer. Focus and Screen (G2) adjustments.

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Scrat
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Oct 10, 2010, 7:55 PM

Post #12 of 33 (2933 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

Yeah, the loose wires are my work.

Quote

Main filter electrolytic has been subjected to so much heat that the shrink tubing on its outside has shrunken excessively.

I can't see what you're talking about, the black thing behind the flyback?

I also can't seem to disconnect the anode wire from the tube, it just doesn't want to come out whatever I do. It does move though and I did ground the tube per the safety instructions.

Scrat
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Oct 10, 2010, 8:06 PM

Post #13 of 33 (2932 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Okay I found how to get it out on Youtube, I was just paranoid of busting something off. Anyway, for the sake of any other amateurs out there I'll share it.

http://www.youtube.com/watch?v=xJcZ7hU5PLw

jts1957
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Oct 10, 2010, 9:30 PM

Post #14 of 33 (2929 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Quote

next to the white block

in the other direction. Cool

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Scrat
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Oct 11, 2010, 1:28 AM

Post #15 of 33 (2924 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

I don't see it, nothing appears to be burnt on any of the wiring and none of the components seem to be damaged.

jts1957
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Oct 11, 2010, 3:21 AM

Post #16 of 33 (2921 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Working from the on off switch towards the flyback you come across your "a small transformer" then the "white block" then before you get to the first of two heat sinks, you come across a tall round aluminum can with a black plastic wrapper with the capacitors ratings printed on it. Wink

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Scrat
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Oct 11, 2010, 4:59 AM

Post #17 of 33 (2915 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

OY!! I see it now, all of the other capacitors have the black cover up and over the edge of the top. It is also slightly rounded/bulged. I think it's bad.

Anyway, it's a 470uf cap at 200v. 24086862.

Scrat
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Oct 11, 2010, 5:24 AM

Post #18 of 33 (2913 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

I'm going to change it a puffy cap has to go. Now I have to find it in my area which shouldn't be hard.

Scrat
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Oct 13, 2010, 3:59 AM

Post #19 of 33 (2891 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

I'll keep you updated JTS. I think this may be the problem. I need to get a soldering iron and the capacitor. It may take a few days.

Scrat
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Oct 16, 2010, 11:58 PM

Post #20 of 33 (2878 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Got the soldering kit today. Now I need to find the capacitor, neither Frys or Radioshack have it. Still looking, any advice? I found one on the internet but it had no picture and I'm afraid to buy it because it may be different.

jts1957
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Oct 17, 2010, 1:13 AM

Post #21 of 33 (2877 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Digikey, Mouser, ebay.
470ufd 200 volt Radial leads 105C would be good, but 85C should work - look at original.

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(This post was edited by jts1957 on Oct 17, 2010, 1:13 AM)

Scrat
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Oct 23, 2010, 5:43 PM

Post #22 of 33 (2850 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Update.
I ordered 2 caps from Digi-Key for about 10 bucks total last Sunday. Not here yet. Thanx again JTS.

Scrat
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Oct 25, 2010, 2:57 AM

Post #23 of 33 (2842 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

Alright. I have the capacitor. Now I ran into another problem, I can't get the red anode wire off the tube or the flyback. At the tube end there is a rubber cover, when you lift it up you see something like a spade connector connected to the anode. The flyback connection is in the picture above. I fiddled with both of them but I don't want to go torquing on them because I'm afraid to break something. How do you get these damn things off?

I need to get the board totally out of the TV and onto the table. Also, is there a specific way the capacitor goes in the board?

jts1957
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Oct 25, 2010, 4:09 AM

Post #24 of 33 (2840 views)
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Re: [Scrat] Toshiba problem. [In reply to]	Can't Post

I usually let board pivot by the wire while weight is on the opposite edge.

http://www.curto-circuito.com/...TV/Aiwa/TV-A1419.pdf

Capacitor and board should be marked with the correct polarity. Wink

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Scrat
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Oct 26, 2010, 5:53 AM

Post #25 of 33 (2828 views)
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Re: [jts1957] Toshiba problem. [In reply to]	Can't Post

I have been studying up on soldering techniques via Youtube and I need to get a desoldering braid. I'm going to put the new cap in the same way the markings were on the old since they look to be the same pattern. I also need to study up on the symbology.

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