[TowerTalk] AlfaSpid controller problems

[Al Kozakiewicz]

The only component common to just the A display is the CD4056 BCD-7 segment driver.

Al
AB2ZY

________________________________________
From: TowerTalk [towertalk-bounces at contesting.com] On Behalf Of Robert Bajuk [rbajuk at gmail.com]
Sent: Monday, January 14, 2013 4:48 PM
To: towertalk at contesting.com
Subject: [TowerTalk] AlfaSpid controller problems

Hi guys,

I am using Alfaspid Rot1Prog rotator here. Strange thing happened few weeks
ago... Rotator works OK, but I do have problems with the controller.

Controller has two 7-segment 2-digit LCD (A1/A2 and B1/B2).

Right (B) displays shows all the numbers OK, but left (A) doesn't. About
half of the left - "A" LCD segments do not illuminate, i.e. - if I turn
antenna to 270 degrees; only half of number  2 which is on A2 display shows
up, hard to read. Same thing thing with A1, ie. "H" - half auto mode, only
part of "H" is there.

I have replaced "A" LCD display, still the same, checked resistors - looks
OK...

Here is the  schematics:
http://www.alfaradio.ca/downloads/support/old/alfaSpid-wire-diagram-Rot1Prog_A4-wip2.pdf

Any idea what could be wrong?

73 Robert, S57AW
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk