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Studer A800 MKIII stuck in Mute
Old 24th September 2018
Here for the gear
๐ŸŽง 5 years
Studer A800 MKIII stuck in Mute

Hello everybody.
I have an A800 MKIII permanently stuck in Mute problem.
The mute light is permanently on and the mute switch has no effect.
No audio playback so it is definitely muted.
I have tried swopping the control panel with a spare and then ran out of time.
Before I start looking at the command cards, I was wondering if anybody might have a simple "have you checked the ??????" or a bad connector type solution.
The machine is a couple of hours away so I want to arm myself with as much repair ammo as possible.

Many thanks....
Old 25th September 2018
Lives for gear
Zeppelin's Avatar
๐ŸŽง 15 years
What a coincidence.
I just finished recapping all the PSU and control cards.
The transport and VU's etc all seemed to work fine, but when tried to record, play back or listen to line inputs everything is quiet.

I noticed the "mute" switch and it doesn't react when pressed. I'll investigate further, but also interested if anyone has any obvius things to look for.
Attached Thumbnails
Studer A800 MKIII stuck in Mute-studer-mute.jpg  
Old 28th September 2018
Lives for gear
Zeppelin's Avatar
๐ŸŽง 15 years
For future reference.
I narrowed the fault down to the Delay Ctrl. card(1.180.551) in the back of the machine. When replaced with a known good card the mute function worked as expected.
Old 27th March 2021
Here for the gear
๐ŸŽง 10 years

I'm just hunting down other A800 mkIII users. I'm trying to change the 24 track head block. Apart from the three screws holding the head block in is there anything else I need to do? The machine works fine with the 24 track head but won't play or rewind/FF when I fit the 16 track head.


Old 4 weeks ago
Lives for gear
Zeppelin's Avatar
๐ŸŽง 15 years
Is the stop light flashing?
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