Question about Zenith Televison & Video
First came the Chromacolor, then the Chromacolor II, and then the System III sets; I know as I worked on hundreds of them from the 1970's on.
The real problem with repairing them is they were designed as a modular set with 90% of the parts on replaceable circuit boards. Some parts were available separate but for the most part it was replace a board. I over the years have fixed many without replacing a board--it depends on what is wrong.
Most likely is the Deflection board is where the problem is---most common one to give problems.
The shop I worked for the last 5 years did see some of these come in for repair and I got assigned most if not all of them as the other techs had zero experience with them.
Most of the customers were older people who did not want to give up on the set---repair of these sets presents two problems----one: most of the boards are now hard to get and two: the set is of such an age that you gamble spending money to fix it and a few months from now something else fails and the part needed is no longer available.
If I was looking at this set I would check the horizontal output transistor first---if you are lucky it failed----shutdown will happen instantly and unplugging will not cure it.
If you cannot attempt this your only other option is to check shops in your area and see if any of them will ATTEMPT a repair on a set of this age.
I like the older sets as they last a lot longer than the new ones---but at some point it becomes a economic decision.
Let me know the full model number of the set and I will try to research it to see what if any parts are still available for it.
I am here to help.
Regards, SD TECH
Posted on Jan 31, 2010
Wow!! 1989, that's a Long time. So, there is no Point in Repair, However, let me inform you, it seems that it is a Power Supply Board Problem.
Open the TV and look for Power Supply Board. Once you find the Board, Pull out the Connectors. Take the Board out. With the help of magnifying glass, you need to check Cold Solder Joints.If not, then Check the Caps and Fuses. I imagine, if this could be due to Power Shut Off, you would be able to Find Some Bulged / Swelled / Leaked Caps. You would smell Ammonia kind of odor. You need to pull them out. Order the same Caps online or go to Radio Shack. It would cost you few bucks, in fact less than 20 bucks. Once you get the Caps, solder them and it is all set.
Note - You need to take all the Precautions as this would involve Voltage.
Let me know, if needed further assistance.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
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