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MC3000 deskset reboots when set to full volume

Tech21

Member
Joined
Oct 16, 2018
Messages
118
MC3000 deskset connected to a digital junction box, and the digital junction box is connected to an xtl-5000 consolette. Has anybody experienced this issue before and resolved it? If so how did you resolve it?
 

wgbecks

Member
Joined
Jan 17, 2005
Messages
229
Location
Porterfield, Wisconsin
This sounds on the surface like you have a power issue in that high volume settings cause the audio output amplifier to draw more current and whereby the voltages sags enough to reset the microprocessor.

My first thought would be to verify that you have the correct power who's voltage and current ratings match the requirements of your MC3000.
It it turns out you have the correct power supply then you will want to measure the output voltage under load to see if it sags with speech under higher volume settings. Beyond that check the condition of the power cord, the plug, and condition of the mating jack on the MC3000 looking for loose or corroded connections.

If you don't find any of the above suggestions to be the cause then you'll have to open up the deskset and trouble shoot the supply regulator and filter sections looking for similar voltage drop conditions. It's also possible the audio amplifier chain draws excessive current that might also
explain the sudden reset of the processor.

Bill
 

Tech21

Member
Joined
Oct 16, 2018
Messages
118
Transmit works perfectly fine and doesn't cause any issues. The volume setting works perfectly fine at mid volume but since this deskset sits in an ER and is used for communication between the hospital and ambulances, it's always been set to full blast. Power supply was good. As old as the deskset is, it was going to start kicking the bucket at some point. An upgrade to a APX and MCD5000 is a little overdue.
 

rescue161

KE4FHH
Database Admin
Joined
Jun 5, 2002
Messages
3,078
Location
Hubert, NC
Had a power supply go bad on one of these before and it behaved like yours. Voltage was correct, but current was flaky and would crap out when volume was turned up.
 
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