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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Recurrent Keyboard Failure on GE clock radio
Recurrent Keyboard Failure on GE clock radio
My favorite old GE clock radio has metal membrane keys for the direct-set alarm. Looks like this: http://nm7u.tripod.com/homepage/keys.jpg Every six months or so, they quit working. Starts at the bottom row and works it's way up over a period of months. I take it apart and run a strip of paper soaked in alcohol between the contacts and it's all good for another six months. I'm wearing out the screw holes that mount it together. Is there anything I can put on the contacts to retard oxidation or whatever's happening? I thought it was dirt, but sealing the whole thing in packing tape didn't help a bit. The radio isn't worth nothin' but it sure is easy to set the alarm time...when the keys work. I have two of these and they both have the same problem. Ideas? mike -- Bunch of stuff For Sale and Wanted at the link below. laptops and parts Test Equipment 4in/400Wout ham linear amp. Honda CB-125S 400cc Dirt Bike 2003 miles $550 Police Scanner, Color LCD overhead projector Tek 2465 $800, ham radio, 30pS pulser Tektronix Concept Books, spot welding head... http://www.geocities.com/SiliconValley/Monitor/4710/ |
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Recurrent Keyboard Failure on GE clock radio
Try some contact cleaner to see if this will sustain them. If you call the
GE Thompson parts department, or any of their authorized parts dealers, you may be able to order a new keypad assy. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "mike" wrote in message ... Recurrent Keyboard Failure on GE clock radio My favorite old GE clock radio has metal membrane keys for the direct-set alarm. Looks like this: http://nm7u.tripod.com/homepage/keys.jpg Every six months or so, they quit working. Starts at the bottom row and works it's way up over a period of months. I take it apart and run a strip of paper soaked in alcohol between the contacts and it's all good for another six months. I'm wearing out the screw holes that mount it together. Is there anything I can put on the contacts to retard oxidation or whatever's happening? I thought it was dirt, but sealing the whole thing in packing tape didn't help a bit. The radio isn't worth nothin' but it sure is easy to set the alarm time...when the keys work. I have two of these and they both have the same problem. Ideas? mike -- Bunch of stuff For Sale and Wanted at the link below. laptops and parts Test Equipment 4in/400Wout ham linear amp. Honda CB-125S 400cc Dirt Bike 2003 miles $550 Police Scanner, Color LCD overhead projector Tek 2465 $800, ham radio, 30pS pulser Tektronix Concept Books, spot welding head... http://www.geocities.com/SiliconValley/Monitor/4710/ |
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Recurrent Keyboard Failure on GE clock radio
"Jerry G." writes:
Try some contact cleaner to see if this will sustain them. If you call the GE Thompson parts department, or any of their authorized parts dealers, you may be able to order a new keypad assy. Yeah, maybe for twice the original cost of the radio. --- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html Important: The email address in this message header may no longer work. To contact me, please use the Feedback Form at repairfaq.org. Thanks. |
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Recurrent Keyboard Failure on GE clock radio
DeoxIt made by Caig Labs is the best performing product I've found for
switch contacts. I don't know where you're located, but these products can be purchased from many of the larger parts/supplies dstributors in the U.S., even that Shack store sells it, I think. The big problem with some push switches (and others like microswitches) is that there isn't any sliding action to keep oxidants wiped clear from the contact area. Cleaning with many type of conact cleaners leaves no protection to eliminate or reduce the reformation of the oxidants. The DeoxIt products work most effectively when the contacts can be accessed, and applied with a rubbing action with something such as a cotton swab tip. You'll see the oxidants on the swab and when the contacts are clean, they're also protected. Heavy/stubborn oxidation can be scrubbed with a hardwood swab stick dipped in DeoxIt. Just flooding push/snap switches with spray isn't as effective as manually cleaning them. I spray the aerosol DeoxIt into a small needle-tipped bottle for applying it to switches and swabs, and this provides a more controlled application. The only application where I've found that contact wasn't improved was a test I tried on the resistive compound contact pads in an IR remote control. For all other metal contacts, the product has always provided excellent, lasting results. In power switching applications, badly burnt or pitted contacts should be replaced. Applying a treatment of DeoxIt to new contacts will insure that they're clean and protected. WB ................... "mike" wrote in message ... Recurrent Keyboard Failure on GE clock radio My favorite old GE clock radio has metal membrane keys for the direct-set alarm. Looks like this: http://nm7u.tripod.com/homepage/keys.jpg Every six months or so, they quit working. Starts at the bottom row and works it's way up over a period of months. I take it apart and run a strip of paper soaked in alcohol between the contacts and it's all good for another six months. I'm wearing out the screw holes that mount it together. Is there anything I can put on the contacts to retard oxidation or whatever's happening? I thought it was dirt, but sealing the whole thing in packing tape didn't help a bit. The radio isn't worth nothin' but it sure is easy to set the alarm time...when the keys work. I have two of these and they both have the same problem. Ideas? mike -- Bunch of stuff For Sale and Wanted at the link below. laptops and parts Test Equipment 4in/400Wout ham linear amp. Honda CB-125S 400cc Dirt Bike 2003 miles $550 Police Scanner, Color LCD overhead projector Tek 2465 $800, ham radio, 30pS pulser Tektronix Concept Books, spot welding head... http://www.geocities.com/SiliconValley/Monitor/4710/ |
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