Question about Microwave Ovens

5 Answers

Fault with Sharp Combination Microwave R959SLM-A If I try to start the unit pressing the "START/AUTO MINUTE" button, nothing happens, but I can set the time using the 'time keys' but only for 59secs, Any help,service manual &/or parts supplier will be very welcome. Many thanks John [UK]

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  • 2 more comments 
  • johnjo999 Mar 28, 2011

    Hi, many thanks for your help but, the download appears to be more a user manual/cookbook. Any chance you could find me a workshop service manual. I have found an electronics engineer who is willing to have a look at it but would appreciate a service manual for reference.

    Regards & thanks again

    John

  • johnjo999 Mar 29, 2011

    Hi, again thanks for the help. Regarding the workshop service manual, as long as the price is reasonable I would be willing to pay, on that basis where can you suggest I can find one.

    Kind regards

    John

  • johnjo999 Mar 30, 2011

    Hi dcramer531, fully appreciate your comments,I was originally hoping it was a common fault/fix but now think it;s a bit more complicated than I first thought, hence requesting a workshop service manual for John that might help him trace the problem. If we should sort the problem I'll post any help we can on here.
    Regards & thanks for all the advice.
    John

  • johnjo999 Apr 01, 2011

    Many thanks to all those who have replied so far, however, what I realise I really need is a workshop service manual and not a user manual, or someone who has come across this particular problem before and found the solution, so that an electrical engineer [who I have been lucky enough to find through a friend] can sort this problem out. Just to clarify the situation, we bought this oven, which was brand new & boxed from a house clearance but with no receipt for the original sale therefore we are unable to return it to Sharp under warranty and our purchase was a 'No return or warranty' sale, that's how it goes sometimes and I accept that. A friend already has one of these and it's really great to use, hence my reluctance not to try every avenue to get this going.
    Again thanks to all relpies so far received.
    John

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5 Answers

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  • Microwave Ovens Master
  • 2,605 Answers

Hello John, Welcome to FixYa. I'm not entirely sure why it hasn't been mentioned or perhaps it has, however all the tech & service info required to service the unit should be located inside the cabinet typically right behind the control panel/user interface. To my knowledge "Sharp" do not issue a service manual specific to any one model, just whats inside the cabinet upon removal, Im pretty sure the engineer friend would suffice with that info. Although I would bet dollars to donuts the interface itself is at fault. When you locate the tech sheet it should instruct how to test switches, magnetron, hv diode, capacitor etc. with the ohm values, position open & closed etc. Hope this helps clarify some uncertainty regarding the "service manual" hunt. Thank you for choosing FixYa. Good luck. Regards, Macmarkus :)

Posted on Apr 01, 2011

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  • Master
  • 1,622 Answers

Hi,If the "fuse" was a self resetting thermo breaker, then it would do
exactly as described. I do believe they are common in microwaves.


While they are common on microwaves they are usually only found on the
magnetron tube (the microwave 'generator') which if cut out would only
stop operation of that tube and would not effect the exhaust fan or
any lights.


The most common intermittent of this type that I see is caused by
solder cracks on the controller pcboards. It's somewhat of a
testimonial to the reliability of the electronics that the solder
connections fail more often than the components themselves.

I see this a lot, on both microwaves and electronic control ranges.
'Have been re soldering them for many years, with good results.
Sometimes you have to look at the conn's with a magnifying glass,
but in cases like you're describing the faulty ones will be obvious
once you get down to the conn. side of the board.

The old microwave were well known for this - they'd burn a 1/4
inch hole right *through* the power/relay boards at the harness
plug pins! But even they could be repaired, so don't be too hasty
to scrap this one. Hold out for a technician who's not afraid to pull
the board and take a look at it before condemning the whole unit.

'Shouldn't have to be pulled off the wall to do this. Access is usually
pretty easy from the front.

Also Microwave Receives Power But Will Not Operate

You may find that the microwave oven display works, but the oven does not operate when the cooking commands are input. This often occurs if the microwave door is not fully closed. The safety features on microwaves will not allow the oven to operate when the door is open.

If the door shuts, check to see if any packing material was left on the door. Leftover packing material may keep the door from securely shutting. Check for any damage to the door that may keep it from closing.

When you are finished checking the door, press the "Cancel" button twice, and reenter the cooking settings. If the oven still doesn't start, contact a service repair technician.

Posted on Mar 30, 2011

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  • Master
  • 1,654 Answers

I have tried to find a free service manual but to no avail, everyone wants to charge for them and that is the common practice. Sometimes you get lucky with a free manual but most times not.
What help I can give is I believe this is a touch pad issue and it has gone bad. What happens is s button or two stick after repeated use and casues the pad to prematurly die. This is a common issue with these ovens and a simple change of the pad will correct the problem.
Order a new control panel frame which has the keypad, trim piece and door button already installed and swap your control boards into it.

Disassemble your control panel frame, peel off the old keypad and stick a new one on.
Even though the keypad alone is inexpensive, this job takes a lot of time and labor.
If you (or someone you know) might want to replace just the keypad yourself, I have uploaded a handy guide with pictures showing you what's typically involved.
You can try this link to see if this place has the service manual, they claimed they do but I can't acces this currently but give it a try here and see if this to helps you.

You will need the
free Acrobat Reader to view or print it in case you don't have it already

Here is some more reading on this issue with the touch pads from sharp. Just cut and past the link in your browser.
www.gallawa.com/microtech/Ch13.html

Posted on Mar 28, 2011

  • 2 more comments 
  • Dcramer531
    Dcramer531 Mar 29, 2011

    Hi just got home from work and I tried the link and it works, the only problem is this is a different model, but the basics are there. I hope this is helpful. I can't find a manual for your model number.

  • Dcramer531
    Dcramer531 Mar 29, 2011

    Ok I found a place that charges about $17.00 US for these manuals. They calim they can get any manual, if one is not listed they will find it for you. that place is. www.servicemanuals.net
    I tried again several times and your model does not come up with anything on other sites and this place did not show one either, but they claim they can find it and send you the download. You can try them and see what they can find. I hope this helps

  • Dcramer531
    Dcramer531 Mar 30, 2011

    You might need to re-phrase your question. It leads some of us on when you say any help is appreciated when in fact what you want is a manual. I gave advice on fixing your oven, and you got that for free from me now you want a manual. I do this every day and I can't find that manual in any of my clients databases. Did you even try the links to the site that sells manuals? Most places don't give them because they want to service your machine, they don't want you to fix it yourself.

  • Dcramer531
    Dcramer531 Apr 01, 2011

    Hi John, good luck with that service manual, I would love to find out if someone can get these for you, but if not, I am confident of the replacement on the touch pad, cause I believe this to be the issue as I have seen these act in the same matter as you are describing. I know of no one that rebuilds them or can for that matter. If your friend can do this for you you might want to get him to sign up and help us out here at Fix ya. Best of luck on this!

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  • Master
  • 794 Answers

Hi johnjo999,

Kindly click on this link where you can download and print a user/service manual for your Sharp Combination Microwave Oven. The manual is applicable for your certain model. Below are the details about the phone numbers that you can contact for the spare parts and General after sales support and advice:

General after sales support and advice
UK: 08705 274 277
Ireland: 01 676 0648
(9am - 5.30pm)

Spare parts (Account Customers)
020 8734 2220

Spare parts (Non Account Customers)
Willow Vale Electronics: 0870 4422 510
Wizard Distributors: 0161 4283 263
SEME: 0166 4484 000
Charles Hyde & Son Ltd: 0175 9303 068


Hope it helps.

Thank you for using Fixya.

Posted on Mar 27, 2011

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  • Master
  • 1,335 Answers

You can get a user manual at
http://www.sharpelectronics.info/Manuals.aspx

Posted on Mar 30, 2011

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ff87dd8.jpg

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