DC777

Date: 09 Oct 92 23:29:43 EDT (Fri)
From: wa2ise@kb1bd.nj.usa (BOB)
Subject: philips DC777 FM scan mod


For those who have the Philips DC777 car radio and are aggrivated by
the fact that it's initial sensitivity is about that of a dead cow,
there is something you can do about it.  I am talking about the fact
that when you scan stations on FM it only stops at the brutally strong
ones, leaving the other weaker yet very listenable ones out in
nevernever land.

So here is what you do:

Open the top of the radio.  This is very easy as the top plate is held
on by pressure alone.  Remove the cassette mechanism, which is held
down by 3 small screws and two connecting cables to the circuit board.
Also no problem.

With the front of the radio facing you, the antenna jack should be on
the far right corner.  Just before that is an aluminum box on the
right edge of the circuit board, about 1.5" square and standing on
end.  To its immediate left you will see a chip labeled TEA6100.  Just
below that (toward the front of the radio) you will see an adjustable
coil which is in a silver box with a black slotted top.  Next to that
is a pot in a smaller silver box with an orange slotted top, and next
to it is a ceramic filter.  The adjustment is made to the orange pot
described above.

Before turning it, mark the original position of the pot so you can
put it back the way it was if things do not turn out right.  Turning
the pot clockwise gives greater and greater sensitivity.

The above procedure will most likely void the warranty, but will make
listening and finding stations much more enjoyable.  The above stuff
is for the FM section only.  

I take no responsibility for anyone who manages to alter their radio
to the point of nonfunctionality or other degredations.
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Note: I haven't tried or verified this, proceed at your own risk. WA2ISE