This 2 year old oven failed last week. ALL the appliances in my house
are dying - central vac, dryer, fridge, wall oven, microwave within 3
months. Even my alarm clock is threatening to die. The dryer, fridge
and oven are the same age, but the vac is much older, micro and clock
much newer. Is there anything that could cause mass appliance death?

After reading sci.electronics.repair.faq for mwaves, I found that one of
the relays was about 300 ohms across the contacts when it was off. I
replaced it with the closest I could find (24VDC coil, 40A AC contacts).

Now, after re-assembly, the oven looks dead. However, if I open the
door, the display turns on welcoming me to set the clock. I set the
clock and then when I close the door, the power goes off, and it's dead.

Open door, set clock, close door can be repeated. No fuses or breakers
blow. When the door is open, the light comes on.

I thought that perhaps the coil resistance might not be a good match.
The old one was 1.1K and the new one was 650 ohms. So I added 600 ohms
in series. Now, I hear the relay pull in, and the microwave no longer
turns off when you close the door. The control panel 'works' but there
is no energy, the turntable doesn't turn and the fan doesn't come on.

Without drawings this is like working in the dark.

What I really need is an OMIF-S-124LM, but delivery is 20 wks and I have
to buy 50 groan. Any suggestions or help very welcome.

Rob

Remove your modification, and check all the door switches for their proper
functioning. You may need to get a relay that is more exact in its match to
the original one. Sharp has a parts order department where original parts
may be bought. There are also electronics parts suppliers around who handle
original manufacture parts.

--

JANA
_____


"Rob Mitchell" wrote in message
. ..
This 2 year old oven failed last week. ALL the appliances in my house
are dying - central vac, dryer, fridge, wall oven, microwave within 3
months. Even my alarm clock is threatening to die. The dryer, fridge
and oven are the same age, but the vac is much older, micro and clock
much newer. Is there anything that could cause mass appliance death?

After reading sci.electronics.repair.faq for mwaves, I found that one of
the relays was about 300 ohms across the contacts when it was off. I
replaced it with the closest I could find (24VDC coil, 40A AC contacts).

Now, after re-assembly, the oven looks dead. However, if I open the
door, the display turns on welcoming me to set the clock. I set the
clock and then when I close the door, the power goes off, and it's dead.

Open door, set clock, close door can be repeated. No fuses or breakers
blow. When the door is open, the light comes on.

I thought that perhaps the coil resistance might not be a good match.
The old one was 1.1K and the new one was 650 ohms. So I added 600 ohms
in series. Now, I hear the relay pull in, and the microwave no longer
turns off when you close the door. The control panel 'works' but there
is no energy, the turntable doesn't turn and the fan doesn't come on.

Without drawings this is like working in the dark.

What I really need is an OMIF-S-124LM, but delivery is 20 wks and I have
to buy 50 groan. Any suggestions or help very welcome.

Rob

Rob Mitchell wrote:
This 2 year old oven failed last week. ALL the appliances in my house
are dying - central vac, dryer, fridge, wall oven, microwave within 3
months. Even my alarm clock is threatening to die. The dryer, fridge
and oven are the same age, but the vac is much older, micro and clock
much newer. Is there anything that could cause mass appliance death?

After reading sci.electronics.repair.faq for mwaves, I found that one of
the relays was about 300 ohms across the contacts when it was off. I
replaced it with the closest I could find (24VDC coil, 40A AC contacts).

Now, after re-assembly, the oven looks dead. However, if I open the
door, the display turns on welcoming me to set the clock. I set the
clock and then when I close the door, the power goes off, and it's dead.

Open door, set clock, close door can be repeated. No fuses or breakers
blow. When the door is open, the light comes on.

I thought that perhaps the coil resistance might not be a good match.
The old one was 1.1K and the new one was 650 ohms. So I added 600 ohms
in series. Now, I hear the relay pull in, and the microwave no longer
turns off when you close the door. The control panel 'works' but there
is no energy, the turntable doesn't turn and the fan doesn't come on.

Without drawings this is like working in the dark.

What I really need is an OMIF-S-124LM, but delivery is 20 wks and I have
to buy 50 groan. Any suggestions or help very welcome.

Rob

Every microwave I have ever worked on always had a schematic somewhere
on the inside of the shell/cover or on the bottom or somewhere. If you
post the details about make, model and serial number people might be
able to give you suggestions.

H. R. (Bob) Hofmann

The only thing they all have in common is your power source.

Rob Mitchell wrote:
This 2 year old oven failed last week. ALL the appliances in my house
are dying - central vac, dryer, fridge, wall oven, microwave within 3
months. Even my alarm clock is threatening to die. The dryer, fridge
and oven are the same age, but the vac is much older, micro and clock
much newer. Is there anything that could cause mass appliance death?

Every microwave I have ever worked on always had a schematic somewhere
on the inside of the shell/cover or on the bottom or somewhere. If you
post the details about make, model and serial number people might be
able to give you suggestions.

H. R. (Bob) Hofmann


I've heard this, but not mine. I've been over every inch of the
cabinet, inside and out, including the bottom.

Rob

Check for the price of the control assembly and the safety switches. Replace
the complete controller. Sharp parts department can look up the part number
and price. Modifying these things can give you unwanted results.
"Mike Berger" wrote in message
...
The only thing they all have in common is your power source.

Rob Mitchell wrote:
This 2 year old oven failed last week. ALL the appliances in my house
are dying - central vac, dryer, fridge, wall oven, microwave within 3
months. Even my alarm clock is threatening to die. The dryer, fridge
and oven are the same age, but the vac is much older, micro and clock
much newer. Is there anything that could cause mass appliance death?