M&S MC350 Intercom issues - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 2 Old 07-21-2010, 07:40 PM - Thread Starter
Member
 
gotcha640's Avatar
 
Join Date: Jan 2008
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I'm staying with my inlaws for a few months, and to earn my keep I'm fixing everything they've broken in the last 15 years around the house. The latest challenge is the intercom system.

It appears to be a M&S MC350. The problem is that when we turn up the Speaker knob (bottom right) we get a squeal that will broadcast to any active room units (not sure what you call the...units in the...rooms. They'd be clients if this was technology from my generation). If the system is left plugged in, the squeal will come and go.

The system was installed by dad, who says the runs to the rooms should all be straight shots, but all the connections on the back of the board, connecting all the remote units to the (server?) are just twisted together and electrical taped. His theory is that there's a loose dusty connection somewhere, so I'm planning on soldering plugs on all the connections to make sure they're solid. Mom's theory is that since the squeal comes from the Speaker knob, the pot could be bad, which is possible, but it does still change the volume. If I get the plugs in and the connections soldered and the squeal remains, I might look at that.

This almost looks like a radio interference issue, since the squeal comes and goes, but I'm not nearly familiar with this stuff enough to just start sticking resistors on there. I haven't found any forums that address home intercoms specifically, and I'm not even sure if this is the place for it.

Any help will be appreciated.
gotcha640 is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 05-04-2020, 02:58 PM
Newbie
 
Join Date: May 2020
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Problem ever fixed

I have the exact same problem. What was the resolution?
David Kasson is offline  
Sponsored Links
Advertisement
 
Reply Home A/V Distribution

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off