Author Topic: Bar graphs - theory of operation please  (Read 2154 times)

kilmister

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Bar graphs - theory of operation please
« on: October 29, 2013, 08:29:59 PM »
Hey guys!

I'm working with new client and he has bargraphs installed in his 4024E console. It looks like there's few plasmas worned out but there's also some trouble with motherboard.
I've been reading Service Manual but I just don't understand how in the heck meters are working. I'm totally confused with all these Ramp Generators and stuff. I'm sure it's not that complicated so I'm asking a favour here. Could someone please write me a wireframe model what's going on with the meters.

Thanks in advance,
Paavo
-- Too much amp power is just right --

-- 5 by 5 Audio
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pascal.verdet

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Re: Bar graphs - theory of operation please
« Reply #1 on: October 30, 2013, 08:45:45 AM »
Hi Paavo,

Please read section 12 in service manual. The entire operation is explained on pages 12-1 to 12-17.
Warning, high voltage on some cards!

kilmister

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Re: Bar graphs - theory of operation please
« Reply #2 on: October 30, 2013, 08:57:02 AM »
Yes, I've spent few hours with Service Manual but I just don't get it  :o
250V just nips a bit, try HT from Ampeg head sometime :p

-Paavo
-- Too much amp power is just right --

-- 5 by 5 Audio
-- 5 by 5 @ Facebook