Annoying Clock on Microwave
 

On Friday, April 22, 2011 10:35:47 AM UTC-7, jeff_wisnia wrote:
From my "I can't believe they'd make it this way" list.

Last year I purchased a new Westinghouse Model WST-3501 microwave oven
for our office lunchroom.

The TOD, which is displayed whenever the unit is on standby, loses about
two minutes a day, and has to be reset every few days

Check your outlet! It sounds like some considerable voltage drop
occurs in the wiring and the clock stops during operation.
I've seen a microwave gain seconds when in use, too (the
TTL chips in the clock circuitry had no bypass capacitors).

Annoying Clock on Microwave
 

whit3rd wrote:
On Friday, April 22, 2011 10:35:47 AM UTC-7, jeff_wisnia wrote:

From my "I can't believe they'd make it this way" list.

Last year I purchased a new Westinghouse Model WST-3501 microwave oven
for our office lunchroom.


The TOD, which is displayed whenever the unit is on standby, loses about
two minutes a day, and has to be reset every few days


Check your outlet! It sounds like some considerable voltage drop
occurs in the wiring and the clock stops during operation.
I've seen a microwave gain seconds when in use, too (the
TTL chips in the clock circuitry had no bypass capacitors).


I doubt if it's voltage drop because the clock loses about 6 minutes
over a three day (holiday) weekend when no one is there using the microwave.

Also, FWIW, a complete power drop out and recovery causes the clock to
start at 12:00.

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10e12 furlongs per fortnight.