1994 Toshiba CF26C30 Intermittant Power Up, Part 10, Will it Werk?

[ThePhonoJack]

Great job, well done! I wonder how many "Instant on" featured TVs of 15+ years ago Have slowly cooked capacitors. Thanks.

[AntiqueRadioandTV]

Wow!

Nice job! Boy, I think I have a lot of patience, but I don't think that I would go as far as you did. I would have probably put it aside for a while or would of completely canned it. I bet you sure felt good when you found that the problem was "really" fixed! I know that feeling too when I restore old radios.

Great job in NOT giving up!

Nicely Done :)

[Lockemeister]

@AntiqueRadioandTV Thanks. I still have to take it apart again. I am not happy with the vert linearity. I have to study how they providde the feedback to maintain the correct linearity. I'm going to try a new vertical deflection chip and check out or replace all of the biasing resistors. The linearity can be better so I will try to make it as perfect as possible. This is a good TV. Sharp picture and natural color. Superior to most LCD's except for maybe the 4-6 top of the line models.

[Lockemeister]

I restore antique radios too. I've done an RCA 810K, A Philco 38-116, A Philco 16B, and a RCA 262.

I've made videos of all of these and how I did it. All great sets for the 1930's era.

[mznxb9872]

Way to go! Congratulations on persevering and not giving up.

[GeoN0JRJ]

So would you say that capacitor tester was worth the purchase? I have been looking at those for a while. Thanks for sharing!

[Lockemeister]

@GeoN0JRJ well i studies up on it and read the ESR meter is great to find bad electrolytics in the circuit board. it seemed to work great and the ones that had the high ESR also had the capacitance out of spec. This "blue ESR meter" can be purchase also fully assembled at about 100 bucks. It cost me 79 I think.

The one I used got good reviews. There are more expensive ones too that really cost dinero. there are cheaper ones that might not be as good. I like how this one can be used in CKT

[Lockemeister]

@Lockemeister I think everyone that will repair solid state stuff should get a decent ESR meter. For the antique radios , I jusr replace all of the antique electrolytics, no sense of testing those.

If the little electrolytics on the printed circuit boards are swollen on top, then that's a no brainer and they should automatically be replaced. The meter can see a bad one though even though the cap might still look good. This is why I think techs need to have an ESR meter.

[chrisstv1979]

I would replace the vertical IC.That is the small 8 pin IC located near where you replaced the caps. Also see if there is an adjustment pot located on the board near the vertical section. If there is try adjusting it. Try those and then report back to me.

[Madness832]

Congrats on gettin' your telly workin' again!

[Lockemeister]

@Madness832 thanks!

[mukerjea]

Congratulations John. You did it again. Now I have a question ~ How much did you spend on materials and components for this TV to repair including that Meter you bought? Just curious.

[Lockemeister]

@mukerjea i built the meter from a kit for 79 bucks. i can use the meter for lots of other projects though.

the relay was 12 bucks and the caps were about 6 bucks.

maybe 12 bucks total for shipping on the parts.

[mukerjea]

@Lockemeister OK so the fix was not that expensive and you got your TV working and for us it was a fun to watch.

Anyway, John you get better soon. Whenever I feel the symptoms of cold getting me, I take the full three days course of "COLD FX". It really works. Give it a try next time as for this time it is late for taking Cold FX. Take care.

[Lockemeister]

@mukerjea ok, thanks!

[OldTimeRadioGuy]

The TV sure lives again..

[Lockemeister]

@OldTimeRadioGuy thanks! it was a first for me

[old64goat]

You are doing a great job, I could not watch all the video, it stopped playing about half way through.

Lately YT videos load very SLOW and sometimes like this one it will not load more than half way.

I think YT has too many videos and they get bogged down.

[Lockemeister]

@old64goat the video played all the way when I tried it. anyway I did get the set working and it's good. It does have a vert linearity problem still. I want to get it perfect and ordered a new Vertical Deflection chip so maybe that will fix the problem with the replacement of the biasing resistors in the circuit.Something is still out of tolerance.

[Lockemeister]

@old64goat i tried it again and it's loading real slow, just like you said it was. Maybe it will work better tomorrow.

thank you for your tips earlier in the series. You really helped me out a LOT!

[chrisstv1979]

In an 18 year old set you will need so solder up all loose connections. You will have a few bad caps. Look for shrunk caps where the plastic no longer covers pat of the top. Just replace them, dont even bother checking them, just get them out because they are always bad.

[Lockemeister]

@chrisstv1979 ARe you familiar with Toshiba's of this vintage? I replaced all of the caps in the vertical yet it still has a vertical linearity issue. Have you ever run into this problem before? Perhaps you can advise

[Tobinindustrial]

A very impressive series. I am happy to see your TV back in the livingroom. I think that you replacing all the bad componenets only makes sense. You have a greater chance now of having the TV for a longer time and not having to buy new... Although TVs are dirt cheap right now, more energy effecient and a lot lighter with larger screens... Helpful hint... hehehehe! Thanks for the series once again. i really enjoyed it

[Lockemeister]

@Tobinindustrial Thanks. I think I took the long way around the block, but I got it working pretty good at least.

[batterymaker]

Congrats! Like someone I knew said, in a very heavy accent, "HAAAAY! YOO GOT PEEEK-CHAR!!"

[Lockemeister]

@batterymaker Thanks! 

[chairuser4]

You can do it,come on!

[Lockemeister]

@chairuser4 I'm going to give the vert linearity another try to make it better as soon as things quiet down somewhat.

[Lockemeister]

@MrDennis8805 "Never give up! Never surrender!"....Tim Allen in Galaxy Quest.

[HardKnocks60]

I think you have your TV working perfectly! The color is outstanding!! It's really weird that Toshiba would put electrolytic caps so close or up against hot transistors and heat sinks, causing them to dry out.

Frankly, I highly approve of your taste in DVDs, especially from an era we both lived in, when television was generally interesting to watch. At least nowadays, we can choose what material we put into our sets with DVD players, not like the old days.

[Lockemeister]

@HardKnocks60 I really think Toshiba had an oustanding sharp picture and a perfected CRT mask

It has a sharper picture than a lot of LCD TV's. I know people will argue. But I think there are about 6 top brands of LCD's and the rest are wannabes. the Toshiba still has a vert linearity issue. I ordered the Deflection chip and will replace the resistors in the ckt too. Thanks for the compliments!

[FeCr3]

Good work!

[Lockemeister]

@FeCr3 Thanks! After watching the set for a few hours the vert linearity drifts a little worse. I replaced all the caps in the section as prescibed by most blogs, but it still has a problem. I ordered a new Vert Deflection chip and will install that and replace the biasing resistors for the chip. I assume that will help out.Toshiba needed to do was to put a vertical linearity adjustment into the circuit! DOH! Planned obsolescence, but it still lasted 18 years. I got a neat ESR meter now at least