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GP350 schematic or info
Posted: Mon Jan 03, 2005 1:31 pm
by jistabout
Hello,
I have a 2ch. UHF GP350 (P94MGC20A2AA) to which I just mounted an aftermarket (Pipo P7-V)DTMF pad. I'm thinking that the best place to tap into power and audio for this is at the connector inside on the bottom of the radio where the OEM DTMF option normally connects.
I need to look at a schematic of this radio if anyone who has one would be so kind.
Thanks Alot!
- Darrell
Posted: Tue Jan 04, 2005 2:12 am
by Will
Same connections as the GP300 and P110.
Posted: Tue Jan 04, 2005 2:17 pm
by jistabout
Why thanks Will, but I don't have schematics for either of those either
- DBH
Posted: Tue Jan 04, 2005 11:34 pm
by Will
I'll look up the pin outs tomorow eve. If i remember, everything needed is on the bottom 'pins'.
Posted: Wed Jan 05, 2005 10:31 am
by jistabout
Thank you
Posted: Wed Jan 05, 2005 11:53 pm
by Will
There is a row of pads on the bottom of the board called the DTMF pad/Display connector, eight including the ground. Pin one is nearest the notch, and 8 is the ground.
Pin 2 is 5v
Pin 3 is PTT
Pin 4 is TX audio, but do not load down this line, use the biggest series resistor value and still get the 3kdev on the DTMF. Loading this line shunts the radios mic amp. This pin is the input to the IDC and Dev attenuator circuits.
Posted: Thu Sep 14, 2006 10:07 pm
by flecom
Will wrote:There is a row of pads on the bottom of the board called the DTMF pad/Display connector, eight including the ground. Pin one is nearest the notch, and 8 is the ground.
Pin 2 is 5v
Pin 3 is PTT
Pin 4 is TX audio, but do not load down this line, use the biggest series resistor value and still get the 3kdev on the DTMF. Loading this line shunts the radios mic amp. This pin is the input to the IDC and Dev attenuator circuits.
do you know what the rest of the pins do?