[1000mp] Need some data about FT1000MP display

[Steve]

----Original Message-----
Sent: Sunday, June 04, 2006 12:07 UTC
To: 'All about Yaesu 1000mp'
Subject: [1000mp] Need some data about FT1000MP display

Hello guys,

One of my friends has a problem with the MP display which suddenly became
almost invisible. As the Service Manual doesn't give too much infos, he
would like to know what is the nominal input/ouput voltage of the inverter
which supply the high voltage necessary to the discharge tube. Two blown
fuses were replaced with no result.

In the past, I've heard on reflector about problems with the outsourced
inverte, but nothing about eventual discharge tube failure.

Any help will be appreciated.
73
Morel
4X1AD

---- Reply -----

The attached message posted by KC3QL several years ago may be of some help.
Steve .. AI7W

----Attached Message-----

John SUGGS 1000mp at mailman.qth.net
Sun, 19 Jan 2003 09:07:04 -0500

If you would like to improve the brightness of the display this how you can
do it.  On the inverter board, there is an 18 OHM  1 Watt resister.  (
R3502 ).  Replace this resister with either two 10 Ohm 1/2 Watt resisters,
in parallel, or one 5 Ohm 1 Watt resister.  The result will be as follows..
Hi will be brighter, but not too bright.  A more pleasant looking display.
DO NOT jumper the resister as you can cause components to fail on the
display board from over heating.  Note if you
use a single 1 watt resister, the leads will be too large for the holes,
suggest that you cut out the old resister and solder the new resister to the
leads.  Otherwise you will have to enlarge the holes.  The resisters that I
used were radioshack 10 ohm's. Which fit nicely..  Once the display is
warmed up I can now easily see it across the room as well in sunlight
conditions.

TIPs:  If you ever have a problem with the display, check these items
first. A. R3502   B.  Fuse F3501  C.  Thermo fuse F3502.  D. Make sure there
is 13v at pin 2 of J3501, if not, the problem is on the display board.

This should work on the MP  & Field.. If some one has the schematics copied
of the field scanned into the computer,  please Email them to me

The original resister drops the 13V dc down to about 10V dc.  The new
resisters will only drop the voltage to about 12V dc....   There are NO
heating issues from this mod.  ONLY a much better display...

I make NO guarantee with this mod, do it at your own risk..
73's   John KC3QL    jrsuggs at msn.com