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Sharp GF9797 tuner display and issues!


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#1 BoomboxLover48

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Posted 14 February 2016 - 09:11 AM

I have a GF9797 radio that works only once in a blue moon. 

 

When you press power button the display screen won't show any digits, sometimes it shows partial numbers. If you press it again it will go for clock selection, or part of a FM frequency display. But once in a while it starts scanning like usual and can auto scan and select a station. 

 

Repeatedly by pressing the power on button if it is not working, if you unplug and lug it back after a min or two it might work normally in radio mode. 

 

I cleaned all the switch contacts and this didn't help a bit. Cleaned the AC in plug/battery switch and showed no difference. 

 

What is causing this issue? Any help regarding this issue greatly appreciated.

 

~Royce



#2 toshik

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Posted 14 February 2016 - 10:31 AM

Is it LED or EL display?

#3 BoomboxLover48

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Posted 14 February 2016 - 11:10 AM

Is it LED or EL display?

It is not an LED display. 

It is the old fashioned black numbers on gray screen liquid crystal display with a less bright built in green bulb on the side to illuminate it. 

 

It is a sweet sounding box. :drool:  :drool:

Very nice tone! See the performance... :drool:

 

You can barely see the display screen in this video. :-)

 



#4 BoomboxLover48

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Posted 14 February 2016 - 05:11 PM

This is a very complicated box....I have no idea where to start.. :blink:  The seller said ....you got the best box ....as usual.  :thumbsdown:  :sad:



#5 baddboybill

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Posted 15 February 2016 - 10:15 AM

Royce that is one issue I would not want to deal with but I'm wondering if it's same issues like the Sanyo M9990 clock 🤔 I've seen a few posts for repair on those 👍


Bad Boy Bill

#6 BoomboxLover48

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Posted 15 February 2016 - 11:01 AM

Royce that is one issue I would not want to deal with but I'm wondering if it's same issues like the Sanyo M9990 clock I've seen a few posts for repair on those


Bad Boy Bill

It works once in a while and if your turn it off then the display is inconsistent. It jumps back and forth and sometimes no display even. 



#7 toshik

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Posted 15 February 2016 - 11:56 AM

May I see a picture of display regardless?



#8 jimmyjimmy19702010

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Posted 15 February 2016 - 11:29 PM

If the individual digits come and go, then you have a contact issue. On the Sanyo displays, there is a row of contacts within a strip of flexible rubberised material. This material is pushed against the board contacts. Over the past 30 years, this rubber strip gets a slight bend in it that lifts the contacts on one side slightly, thus causing this issue.

The fix I used on my M9990 & TRK-9150 was to straighten up the strip with strips of thin cardboard - this proved to be an easy and effective fix.

So you're going to have to pull it apart for a look-see.

James.... :-)

#9 toshik

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Posted 16 February 2016 - 01:29 AM

If the individual digits come and go, then you have a contact issue. On the Sanyo displays, there is a row on contacts within a strip of flexible rubberised material. This material is pushed against the board contacts. Over the past 30 years, this rubber strip gets a slight bend in it that lifts the contacts on one side slightly, thus causing this issue.

The fix I used on my M9990 & TRK-9150 was to straighten up the strip with strips of this cardboard - this proved to be an easy and effective fix.

So you're going to have to pull it apart for a look-see.

James.... :-)

Yep! Straight to the point.