[ICOM] New Thread: Repair of ICOM IC-27H (or IC-27A)

[D C Macdonald]

The problem (so far) is with one individual segment
of one individual display (top horizontal segment) of
the 1 MHz display.

My original display unit (DS1) progressively failed
one segment at a time until the frequency could
no longer be determined.  The replacement display
unit (now beginning to fail) cost me $78 back in 1994.

This is the reason I am searching for individual LED
segments.  I simply don't want to eventually simply
have to pitch my IC-27H into the trash bin.

73  ---  Mac, K2GKK/5


----Original Message Follows----
From: ma.locksmith at juno.com
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: icom at mailman.qth.net
Subject: Re: [ICOM] New Thread:  Repair of ICOM IC-27H (or IC-27A)
Date: Sun, 23 May 2004 09:52:27 -0400

The IC-27A has a multiplexed display and each segment
(a through g) has a current limiting resistor in the vicinity
of the 4511 driver chip.

I've seen these increase in value (from the nominal 39
ohms) and it will lower the current, and therefore the
brightness, of the display segment.  However, the symptom
is that the same segment is less bright in each digit.  Is this
what you see?  Or is an entire digit dim?  Before I condemned
a digit, I'd make sure the digit drive is good.

Ed
K1ZOK


On Sun, 23 May 2004 03:16:35 +0000 "D C Macdonald" <k2gkk at hotmail.com>
writes:

  > Has anybody ever found replacement LED segments
 > for repair of the display?  I already replaced the entire
 > display at a horrible expense about 6 years ago.  My
 > 27H was the rig I used for my packet BBS until 5
 > years ago.  I have not used the rig since 1999, but
 > now several segments have already gone dark.  I
 > REALLY don't want to spend $75 for a new display
 > unit and I could repair the display if I could locate
 > a source for the individual segments (which are
 > discrete).
 >
 > Any help would be appreciated.
 >
 > 73  ---  Mac, K2GKK/5
 > Oklahoma City, OK