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Vx-2200

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curtbrim

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I have two VX-2200 radios that when the ptt is pressed, looks like it turns the radio off and back on instead of transmitting. is there a programming problem here? It seemed to have started when we changed to narrow band, but that might only be a coincidence.
 

N0GX

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I have two VX-2200 radios that when the ptt is pressed, looks like it turns the radio off and back on instead of transmitting. is there a programming problem here? It seemed to have started when we changed to narrow band, but that might only be a coincidence.
Are they hooked to the same power source? If they are, check the voltage of your power source.
 

curtbrim

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one is in a vehicle using a direct wire to battery connection and the other is attached to an external desktop 12v power supply.
 

VSTech

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1. With NZ07; Check to see if you have enough current to power the PA's.
2. Are you using an in-line noise filter with your DC plug connection? In the past, I have seen issues with VX-2200 main boards that has caused this issue.
 

curtbrim

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not sure what NZ07 is. I have checked and the power is at 13.78 volts on the desk top power supply I am using to test with. The power cables have an inline fuse but no noise filters.
 

VSTech

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Sorry I meant member NZ0J.

Power supply should be set to 13.6Vdc @ 15A

Is this a standard VX-2200 or LTR model?

If LTR, check programming to make sure it's not corrupt, if corrupt do try reloading program to default settings.

Disconnect power, unsolder pin 3 of Q1009 (PA) from the board (this removes 13.6Vdc and disables the PA), reconnect and turn unit on. Does it reset power when you PTT?
If the unit does not reset power, when you PTT, Replace Q1009 (Need to know if its LTR, Standard, UHF, or VHF) example: VX-2200-D0 or G7, VX-2200-AD0H or AG7H

If the unit still resets power, might be your code plug / program or I'll have to look more into what the issue is, but it sounds like your PA has gone bad.
 

MBill

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2200 power issue

For the vehicle issue I would also check that you have clean, tight connections for your power
cables to the battery. Also check power connection at radio end. Have seen this problem with
radios that have bad connections at battery or at the connector at radio. Also make sure you do
have a fuse in the negative side power cable if you are connecting directly to the battery. Otherwise,
if you lose the battery ground strap to the vehicle chassis, the only path for all the battery/alternator
current is thru your radio power cables. Seen a few cable melt-downs when this happens without a
fuse in both positive and negative cables to the battery.
As I recall the VX-2200 draws about 7 amps when transmitting. As others have suggested make
sure you are getting enough amps to power the radio.
 
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