No Tuning and Channel Stored In TV Solved
The complaint of this Singer CRT TV was no tuning and channel stored. No matter how hard you try to tune to the UHF and VHF channel, you still won’t be able to lock on the screen. So what you can see from the TV screen was just the snowy picture-see the below photo.
In order to confirm if it is really the tuner fault, one has to download the Tuner schematic and perform the voltage test. I can’t find the exact diagram so I’m using another TV model for reference.
The first step is to open the cover and access to the tuner. Next, you need to power On the TV and check the AGC, VHF-H, UHF, BM and etc pins. All the voltages seem to be within the specification.
Since all the Tuner pins voltages are within specification so I can now assume the Tuner is the cause of the problem. In my workshop I have a similar TV (working unit) so I removed the Tuner and replaced it.
Guess what? The TV now can be tuned and the channel can be stored-see the photo below. My repair job is done.
This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.
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https://www.jestineyong.com/no-power-in-toshiba-led-tv-repaired/
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George
August 13, 2015 at 10:30 pm
Good job, Suranga.
How incredibly lucky you were to have an identical TV in your shop. What are you going to do with your newly broken TV now?
Marvin
August 14, 2015 at 9:07 pm
Have you try to see for dry joint in the tuner. This was a common fault for sony CRT T.v
Suranga Electronics
October 26, 2015 at 2:12 pm
I repaired Some Tuner Replacing IC. But Not Come Drying Solder this Type Tuner. Thanks !!!!!! your comment.
Albert
August 13, 2015 at 10:53 pm
I have at least 5 older CRT tv's portable Color and B&W (60's and 70's models) that I wanted to give to anyone that wants them in perfectly working condition. But nobody wants them. It would give me some space back. And since they are perfectly working, I just hate to throw them away. It would be a real shame since I also repaired them in the past by replacing the defect components.
Martin
August 13, 2015 at 10:53 pm
Now you just need to repair the tuner and document it for us to see 😉
Yogesh Panchal
August 13, 2015 at 11:43 pm
Congratulations! Suranga for another fix.
sagar sen
August 14, 2015 at 12:22 am
sir, is all tv have same problem when this symptom shown..
Robert Calk
August 14, 2015 at 12:37 am
Good job, Suranga. Did you open the defective tuner and see what was wrong with it?
Suranga Electronics
October 26, 2015 at 2:22 pm
yes Mr i checked Tuner I re soldered and checked SMD parts But not Success
i think it's IC defect. ic not available our market. ok thanks Mr. your Comment.
hongkongpom
August 14, 2015 at 3:54 am
Hello there I liked the article very much but am confused.
You say that the voltages on the tuner pins are all correct but then state that the tuner is faulty?
If it was faulty wouldn't the pin voltages be incorrect?
Thank you
trevor
August 14, 2015 at 6:05 am
Good work.
I try to repair the tuners if possible first, usually flip the can plates off and i find they are plagued with dry joints, rework worst solder joints with iron then i apply liquid flux and apply hot air from rework station to reflow pcb. Then i check for cracked or broken wire from rear of tuner socket to pcb then check dc block capacitor and clipping diodes.
Then i change tuner if not a worker, tuners in thru plate boards are worse to remove.
Joe
August 14, 2015 at 8:22 am
Great article, but I have a question.. If the voltages were within specs, then why replace the tuner, assuming you were testing the original tuner... otherwise great article...
dicksy
August 14, 2015 at 2:58 pm
nice work suranga.well done .
dicksy,colombo
Mark Tembo
August 14, 2015 at 3:30 pm
Thanks for the article.
bruno
August 15, 2015 at 3:56 am
Hello in your article you said all the voltages of tuner are within specs. Then you put in a tuner. confused
Almas Shahzad
May 25, 2017 at 4:02 pm
I think these voltages are input but not output
BIRUK AWEKE
August 16, 2015 at 3:39 pm
Good job &explanation thanks.
Humberto
August 20, 2015 at 12:49 am
Good repair Suranga. Explanations are excelent. Congratulations.
Suranga Electronics
October 26, 2015 at 2:28 pm
Thanks mr.
aziz ola
August 20, 2015 at 12:15 pm
thank you jestine yong your website is very good
wills
August 20, 2015 at 6:04 pm
thanks for your explanations
Ravindra
November 11, 2015 at 11:20 pm
I have LG Flatron tv.during tune that tv display some channels.but after tuning not stored any channel.
Prasanna Wasalathanthri
May 30, 2016 at 8:37 pm
Thanks Bro, God Bless You
Niro
June 17, 2016 at 10:21 pm
Great job and thank you very much for sharing your valuable knowledge with us.
shanaka
July 21, 2016 at 12:34 pm
i have sony 29 crt tv the tv have a no snow & no tuning the channel and audi muting work is av dune but no sound ple. tel me a matter
sagar
September 20, 2016 at 1:36 am
Sir, I have a CRT TV make lg company the problem is that I m unable to store any channel only snow dots in my tunner there is SDA and Scl pin which come fro 24f16 memory ic , sir is this my tunner problem, all voltages are OK there is no B1 Or B2 plz help
Md s islam
January 13, 2017 at 8:43 am
sir how are you? sir i am change an tuner but my tv is on screen display whene i tuning the tv but not any chanel please an solution this
Chaminda
September 1, 2017 at 5:23 am
Dear Suranga,
Please clarify what BM pin is.
Thanks
Belief tamang
January 3, 2018 at 8:36 pm
No village in tunner
Sumith
February 17, 2018 at 10:03 am
I have singer led tv 19 inch only flashing singer logo display cannot on can u help.thanks
AMIR
June 15, 2018 at 5:38 pm
DOES UR TV LED INDICATOR FLASHES 5 TIMES? DOES ANYBODY KNOWS WHAT IS THIS MEANS?