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

[ma.locksmith at juno.com]

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:
> Okay, now that the squelch problem of the 27A has
> apparently been solved, I have a question pertaining
> to both 27A and 27H.
> 
> 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
> 
> 

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