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“What questions do you think are going unanswered here?
Think that Kennmore Washers are expensive! Home warranties may make sense
if appliances are expensive to replace or nearing
the end of their life span. If you have a faulty home appliance, then you must not
wait until the minor issue can become major and unbearable.
Also, if I bought a replacement for the entire unit,
I'd then have yet another set of electronics without
a meter! Common problems with older electronics in general are dried up electrolytic capacitors, bad connections, deteriorated wiring, and
corrosion if used or stored under damp conditions. Pressing "Load Hold" under normal conditions
will override the CVT-16 set-point and allow the load to be powered regardless of pressure.
Pressing "Reset" and "Load Hold" at the same time will
override the fault and allow the load to be powered should this be
needed to remove the fault condition. It seems that no two TC gauges ever use the same
drive frequency! An off-center hole was drilled and tapped for
an 0-80 screw that would adjust the separation of the two "leaves".
There were a grand total of two (2) caps (one
for half wave rectified line voltage and the other for the low voltage derived from it - 4 uF
at 150 WVDC and 20 uF at 10 WVDC). I have put
TWO sections, further down this article, for do it yourself-ers (DIY).
The hands can be reversed by registering the lugs differentlyAll project content written and produced by Mike Edwards,
founder of DIY Doctor and industry expert in building technology.
With modern and scientific innovation there are
various technology has evolved in different types of fridges being in the market.
Replacing them with slightly larger values from my
used but tested stock, totally cleaned up the drive
signal which was a bit over 0.3 V p-p, just about right for the DV-4D TC gauge tube (there is an adjustment of this if needed).
This Web-site is actually my second TC gauge using a DV-4D tube.
I still would like to find a DV-4D for this or my other gauge (which I also tested with the DV-4AM).
It uses a DV-4D TC gauge tube and has a useful range of 0.1 to
20 Torr so it is for the upper end of medium vacuums.
When I worked on repairing this unit, I didn't yet have a TC gauge tube for either but was
able to look at the heater drive signal with an oscilloscope and
inject a low DC voltage to simulate the thermocouple output to test the meter and amplifiers, if any (in this unit there
are no amplifiers for the meter). The main precautions to take are to avoid
blowing out the meter or TC gauge tube heater with excessive current - even measuring their resistance
with an analog VOM on the low ohms range may be fatal.
Figuring that this was due to dried up electrolytic
capacitors, I opened the back of the meter (all the circuitry is on a printed circuit
board inside a metal cover). The schematic of the VT-4 (courtesy of Hastings) is shown in:
Hastings VT-4/VT-6 Readout Circuit. Later, after noticing
that the line regulation of the simple zener
circuit wasn't that great, and in addition, the reading was drifting as the gauge heated up, I replaced the AC input circuitry with
a low voltage power supply consisting of a 12.6 VRMS
centertapped transformer, full wave rectifier, filter capacitor, and LT1084 regulator set
up for 6.0 VDC, which was slightly less than what I measured across the
zener but the adjustment pot had plenty of extra range and that allowed
me to use a transformer I had gathering dust on my transformer shelf.
Simply remove the filter cover and pull lower rack out to remove filter
cover inside a dishwasher. After removing the front cover
and set-point mechanism, the extent of the damage could be seen. It can be taken off by
removing the screws and sliding it forward. Avoid buying an automatic defrost freezer,
which can decrease energy efficiency by up to 40%.
And if your freezer suddenly starts to take on a lot more frost, or needs defrosting more
than every couple of months, check the door again for a good seal.
Most customers don’t know this, have the inclination to investigate, or even want
to take a chance they’ll cause more problems than they already have.
For other responsibilities like marketing strategy
and distribution and just general maintenance, I'll have other amazing members of my team take care of
that. General Electric makes a wide range of appliances that have given the homeowner an edge that previous generations could only dream about. |
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