No Power In Hitachi TV Repaired
The complaint of this 21″ CRT Hitachi Television was no power. Once the cover was removed the first component I checked was the fuse.
The fuse was found to be opened circuit. This could mean there is a possibility some other components shorted in the circuitry.
I continued to check on the primary side of the power section and found the bridge rectifier was good!
Next I checked on the power IC and found that it was shorted. This is the reason why the fuse was blown.
When i removed the power IC and found that indeed it was exploded and cracked.
I then replaced the bad components with new one and connect a light bulb to check and make sure no more short circuit. It was indeed no more short circuit when the bulb did not light up.
Lastly the main fuse was put in and Powered On and the TV came back to life.
Conclusion- In total I found five bad components in this power supply side. In some repairs, there can be more or less bad components depending on how heavy the short circuit is. If you are a beginner and wish to learn how to repair CRT TVs you can click HERE for more information.
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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Note: You may check out his previous repair article in the below link:
Henrique Jorge Guimarães Ulbrich - Brazil
September 3, 2015 at 11:53 pm
Good job, Suranga. In the text you have mentioned three bad components, but in one of the pictures there are a total of five, not cited in your maintenance report. What happened to the other two?
September 4, 2015 at 12:08 am
Suranga, Another good article congratulations!
October 26, 2015 at 1:52 pm
September 4, 2015 at 1:50 am
Hi Suranga, good repair. Keep up.
September 4, 2015 at 2:08 am
September 4, 2015 at 4:08 am
Good job, Suranga.
September 4, 2015 at 6:14 am
Great Job Suranga!
September 4, 2015 at 7:06 am
Classic job Suranga, well done!
September 4, 2015 at 7:58 am
Wow i havent seen a CRT tv for years but nice fix nevertheless.
The tv looks very uncared for no wonder it had problems!
September 4, 2015 at 8:36 am
Excellent job,keep it up.Suranga
September 4, 2015 at 4:31 pm
Good job. Thanks for sharing this article.
September 7, 2015 at 9:58 pm
True, the other TWO components are not mentioned. What was wrong with them?
September 7, 2015 at 11:28 pm
I share Gary's comments. Great job though. Personally I don't like working on CRT TVs. I prefer LCD and LED for obvious reasons.
September 11, 2015 at 10:59 pm
Me too, my back can't handle those heavy CRT's anymore. But I still like learning about them since my scope has one in it.
September 12, 2015 at 2:18 am
Please send link to SRT-5Q0765RT datasheet and alternate P/N .