>>>READER-TO-READER QUESTIONS AND ANSWERS
These chips can memorize commands
from your existing remote, for playing
back under control of your own switches. With IRMimic2, you can record
several commands and then play them
back in sequence as a macro, all in
response to one button press.
[#11073 - November 2007]
In the past several years, it has
become harder and takes greater
pressure to make contact with most of
the rubberized keys on our TV remote.
Inside, I've noticed a slimy film
covering the circuit board and
keys. I've cleaned everything with
contact cleaner. It worked for several
months, then, the same old problem
are not worn out.
Carefully pry apart the remote
control; some may have screws
holding it together. Place the pad in a
tall microwave safe drinking glass.
Cover the pad with water to one inch
above the pad. Add one teaspoon of
table salt. Place in a microwave oven
and microwave on high power for
three or four minutes. Remove it from
the oven and add a squirt of liquid
dishwashing soap. Stir well, remove
the pad, and carefully scrub it with a
toothbrush. Also, clean the remote
control top cover, inside and out.
Rinse well and allow to dry. To clean
the circuit board, I use Rawn
contact/degreaser part #1118 (
available from MCM; order #20-2005).
Use a paper towel saturated with this
and wipe the board and keypad.
You may also use denatured
alcohol, but be careful not to get any
on the plastic case.
problem. In our shop, we clean the
rubber buttons with dish soap and
warm water. Clean the board contacts
with 90% alcohol. If that works well
and excess pressure isn't needed to
operate, return it to service and
consider some form of plastic bag,
wrap, or other protection to keep it
from the drink spills that no one will
ever admit to. If the excess pressure or
no operation still persists, apply
conductive coating to the bottom
of the rubber key pads. (Caig Caikote
44 #K-CK44-G, MCM #200-315 or
Chemtronics Rubber Keypad Repair
Kit #CW2605; MCM #20-3890.)
Des Moines, IA
#1 I also have seen the problem
with remote controls and some two-way radios that use pressure type
switches. The carbon impregnated
rubber either becomes contaminated
or wears away over time.
A solution that I have found is to
buy some adhesive backed foil. Craft
stores and home centers carry metal
tapes that should work. I have a few
rolls of tape that I got from
RadioShack years ago that were used
on audio tapes.
Take either a handheld hole
punch or a hobby knife and cut the
foil to fit over the carbon part of the
rubber buttons, where they depress
against the PC board inside of the
remote control. Carefully place
the adhesive foil over the old rubber,
trimming it to fit neatly and reassemble the remote.
Whenever you press one of the
buttons, the foil will make contact with
the PC board instead of the less or
non-conducting carbon coating. The
foil will make good, long lasting
contacts that should be much less
prone to contamination or wear.
E. Kirk Ellis, KI4RK
#3 The slimy build-up on the PC
board can be all or just part of the
#4 Make sure the contact cleaner
you're using is of the fast dry,
non-residue type (non-lubricating).
"The slimy film" may be left over from
the contact cleaner and will attract dirt
to the contact pads. Isopropanol
alcohol can also be used to clean
these type of contacts.
#2 I have successfully cleaned
dozens of remote controls using
the following method. This is a
long-term solution if the carbon pads
January 2008 103