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Old 21st Jun 2019, 1:56 pm   #12
andrewgm
Retired Dormant Member
 
Join Date: Jun 2019
Location: Gateshead, Tyne and Wear, UK.
Posts: 9
Default Re: Signal Communications Corp R535 Receiver

Quote:
Originally Posted by Jon_G4MDC View Post
Hi Andrew, we like this sort of thing!
Biggles has a good point to look for PLL reference frequency - definitely before touching the CX7925B!! Absolute last resort there.

The reference frequency comes from a crystal - in an oval metal can and with part reference Y2. I have highlighted the location on the main RF board here.
Mostly these have the frequency stamped on the can and are easy to read. See if you can pick up that frequency on another receiver.
...and I thought I was being a pain in the a.. !
Thank you for your encouragement...I'll do what you say and report back...
Quote:
Originally Posted by HamishBoxer View Post
The time I have ordered chips only to find it is not that. Could even be the crystal itself or dry jointed.

You need a head magnifier though and to know what you are looking for.
I'll buy one, and I'm beginning to understand the schema and the board itself now.

Thanks for your input

Andrew
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