mcs2000 no audio&tx

[michiel sanders]

since a few days my vhf 25W model II mcs2000 has no more audio & tx

the audio is complete gone, no startup beep or nothing.
the speaker works fine on the mcs2000 of a friend of mine.

and it doesnt respont to the ptt button, tried 2 mics.

when transmitting with my mt2100 the rx light burns so that's ok.

but what can be the problem with the audio end the tx?

michiel.

[Jim202]

There are a number of different models of the MCS2000. The model 1 has an internal
speaker. You may or may not have the accessory cable plugged in. If the radio was
never used with external accessories, then this is not the issue. If it was, then you
need to have the right angle accessory connector plugged into the bottom of the radio.
It will have a jumper from pin 1 to 2. This makes the internal speaker work.

If you have a model 2 or model 3, then you need an external speaker. I would check
to make sure the speaker is working. Normally they have a plug in series with the wires
that you can open and measure with an Ohm meter across both wires. You should
see about 1 to 4 Ohms, depending on how good you meter is. If you don't see this
almost dead short on the wires going to the speaker, it probably opened up on you
and needs to be replaced. Does the yellow busy light come on when a signal is present
and should be heard.

On the TX issue, you need to provide some more details. Is the radio even showing
a display on the channel display? You didn't mention that you could see that the
radio was turned on.

Jim

since a few days my vhf 25W model II mcs2000 has no more audio & tx

the audio is complete gone, no startup beep or nothing.
the speaker works fine on the mcs2000 of a friend of mine.

and it doesnt respont to the ptt button, tried 2 mics.

when transmitting with my mt2100 the rx light burns so that's ok.

but what can be the problem with the audio end the tx?

michiel.

[michiel sanders]

i found the problem,

the audio ic has a short, after i removed it i could tx again.
now i orderd a new audio ic from fleabay for $15, hope it will put the audio back again

michiel sanders

[N4PLY]

I had a similar problem with an install for a Model II Smartnet radio. One side of the speaker lead had inadvertantly been grounded thru the door threshold molding clip. The receive audio was still ok, a little pinched off, but the radio would not transmit. Replaced the speaker lead and all was good.

[michiel sanders]

yesterday received the ic that i orderd trough fleabay, solderd it in and it works great.