From: Garey Barrell 
Subject: Re: [drakelist] TR7 misc.


Garey Barrell  made an utterence to the drakelist gang
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Mike -

Good choice!

The PTO bulb IS supposed to be lit, but some seem to think it generates 
too much heat near the PTO.  Never noticed the problem myself, and I use 
mine for PSK-31.

Anyway, it's a #53, round bulb, 14V.   You have to pull out the DR-7 
board to get to the bulb.  Not particularly hard to do the second or 
third time, but the first time is an experience!  There are several 
groups of connectors, (just very long pins that are unsupported,) that 
hold the board in.  There is (or should be) one screw left of center 
that must be removed.   The cable connectors are marked with a paint 
dot, and the coax connectors are all made to just reach.   But make a 
sketch anyway the first time.  The connectors are 9 pins at the rear 
edge, 12 pins at the left and a couple of groups of three.  Start at the 
back edge and lift a little.  There will be a LOT of resistance.  Just 
try to work your way from group to group and coax it out.  The back edge 
comes out first, and the LED displays fit into a little "pocket" in the 
front panel, so lift up the back and when the pins clear pull it towards 
the rear of the radio.  A length of coathanger wire can be formed into a 
"card puller" similar to what Drake provided with the radio, with just a 
little "foot" bent at the end to hold under the board.

While you have it out, reflow the solder on all the long connector 
pins.  The most common failure in this board is cracked solder on those 
pins.  Visually make sure the pins are all straight and even before 
reinstalling.

Replacement is just the opposite, get comfortable and gently insert the 
display into the "pocket" and lower the rear of the board while watching 
through the various holes to be sure that the pins line up correctly.  
It will go down smoothly as long as all the pins are in the sockets.

The second time is a LOT easier!  :-)

73, Garey - K4OAH
Atlanta


Mike Williams wrote:

>As a new TR7 owner, let me first  say that I have waited 25 years to
own this radio and it is sweet.  Sitting next to my 4 C line and residing
above the inferior Icom below it.  OK I need to know if the PTO lamp should
be illuminated on the analogue dial,  the rig has the DR7 display,
>and is there a lamp for the band switch?  The schematic I have shows
DS1 and DS5 as the two lamps in question.  If so, how much of a chore is it
to change them?
>Thanks,
>
>Mike   AK7P
>  
>

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