The Mystery of the Sanyo Clock Revealed...

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superlew

superlew

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So...
The clock on my personal grail Sanyo M9990 was displaying only 1 segment. That's no way to live. :nonono:




Turns out the display wasn't making proper contact with the board. First, CAREFULLY remove the clock and "stuff".



Next, remove the plastic retainer with the plastic spacer, polarized lens, and display.



Then, make a "shim" out of thin clear plastic. This will apply pressure to the display when assembled, ensuring contact to the board.



Then, test it. If the clock circuit isn't damaged by spazing out trying to put the clock layers back together, you should be successful.



It looks much better with the chassis installed in the radio.



I'm not sure if this is a closely gaurded secret, but I have not been able to find any info on the clock on this unit. That's why I thought it appropriate to share this repair. Should I sleep with one eye open? :huh:
HINT: if you don't have them, pick up some reading glasses and a magnifying glass.
 
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superlew

superlew

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Great job .... I'm glad the box don't look like that truck :lol: :lol:
Me too! :lol: Just having some fun at my Uncle's shop.
Poor guy - I'm always taking his tools. He's half the reason my boxes are alive.
 
Lasonic TRC-920

Lasonic TRC-920

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Wow man, now that's digging deep. Most people would just write that off as F'd. But like Bill, I hate a non working clock. Call it my OCD kicking in, but my brain just can't take it :blink: I would have to figure something out.

Now a days everything is digital, but back then a digital clock was a sign of a high end product. When I see blasters with this luxury item I think class and quality :yes:
 
superlew

superlew

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Wow man, now that's digging deep. Most people would just write that off as F'd. But like Bill, I hate a non working clock. Call it my OCD kicking in, but my brain just can't take it :blink: I would have to figure something out.

Now a days everything is digital, but back then a digital clock was a sign of a high end product. When I see blasters with this luxury item I think class and quality :yes:
Thanx TRC 920. I was inspired to get it right when I came across an eBay listing for a 9990 with a busted clock. The seller had even glued some fake switches to where the actual clock switches were supposed to be.I knew there had to be something more to these clocks, seeing that most seem to be failing on this model. :hmmm:
So I went to the shed and dug out the old chainsaw and pickax :jason: and after some digging, the problem turned out to be a lot simpler than one might expect.
I hope others try this to get their clocks going. Just work carefully, as the clock circuit is somewhat fragile. :-)
BTW, the eBay Sanyo went for $52.00 .
 
Macdude443

Macdude443

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This is great info. My clock has never worked fully. I was under the impression that the problem was a NLA IC. I'm going to pull her apart this weekend!
 
superlew

superlew

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This is great info. My clock has never worked fully. I was under the impression that the problem was a NLA IC. I'm going to pull her apart this weekend!
Let everyone know how it turns out. I see so many of these clocks with missing segments.
I really hope you get it going. :-D
Does that model take a little AA battery tucked away somewhere like the 9797?
Yup. :yes: It's located in the battery compartment above the 8 D's.

Edit: I also find this to be the most accurate clock in the apartment. No lie.
 
J

jimmyjimmy19702010

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I did a similar thing on my Hitachi TRK-9150. Whilst the LCD was dead, the timer kept turning the radio on and waking me in the night so I knew timer and sleep functions worked. After pulling the LCD display apart I realised the foam that sat behind the glass screen had shrunk allowing the rubber conducting set up to bend a little thus stopping contact with the circuit board behind. A lot of trimming etc got it working 100%. That was a very satisfying repair as it enabled all of the front controls of the unit to finally have a purpose! - I've tested the clock and it's as accurate as my $800 Quartz Seiko!

James.. :-)
 
Alberto

Alberto

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superlew said:
So...
The clock on my personal grail Sanyo M9990 was displaying only 1 segment. That's no way to live. :nonono:




Turns out the display wasn't making proper contact with the board. First, CAREFULLY remove the clock and "stuff".



Next, remove the plastic retainer with the plastic spacer, polarized lens, and display.



Then, make a "shim" out of thin clear plastic. This will apply pressure to the display when assembled, ensuring contact to the board.



Then, test it. If the clock circuit isn't damaged by spazing out trying to put the clock layers back together, you should be successful.



It looks much better with the chassis installed in the radio.



I'm not sure if this is a closely gaurded secret, but I have not been able to find any info on the clock on this unit. That's why I thought it appropriate to share this repair. Should I sleep with one eye open? :huh:
HINT: if you don't have them, pick up some reading glasses and a magnifying glass.
Click to expand...
My clock is also not working. Between what parts does this shim get installed ? :hmmm:
 
superlew

superlew

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Alberto, the clock parts are layered like this:

Retainer - Factory Shim - Polarizing Lens - Display

I placed my shim between the Factory Shim and Polarizing Lens. I supposed you colud place it anywhere in the "sandwich," but you do want the Polarizing Lens to sit tight to the display. Also, double-check the clock to ensure that you have the polarizing lens properly oriented before completely re-assembling. I made my shim from a pack of sheet metal screws.

BTW, thanks again for that clutch assembly. The M70 is going strong at 100%!
 
Van Presence

Van Presence

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Jan 27, 2015
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Rainy day at home, thought I'd give your clock repair a go. Took my time getting apart. Wasn't exactly sure what to use or where to put 'shim' so just put back together. Turns out it worked. Happy happy joy joy. And randomly I actually got my not working 1 to work. Although my setting buttons not exactly working. Can't set hours. Either way its working. Wicked! Cheers
 

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