HR 2510 with no audio!

[hacksaw]

Hi, I picked up a President HR 2510 today and was told that it had no audio. I checked it when I got home and sure enough, no audio comming from the speaker. I hooked up my working external speaker and still nothing. It will tx. and has good power output. The accessory plug is the one with several wires comming from it. I believe on my last 2510, I had a plug with one white jumper, and I thought the jumper is what made you have audio output. PLEASE HELP!!!

Shawn

 

[ExitThirteen]

Do you have TX audio at all? If you have no TX audio, I'd suspect the audio chip has gone south. I think it's labelled IC103, and it's TDA1905 on the actual chip. I'd be looking at that first, especially if you have a deadkey on AM, but no modulated audio. Check it out and let us know how you get on.


-Exit

 

[hacksaw]

Hi, I do have modulation on both ssb and am on transmit. Just no sound comming out of the speaker. However, I do not know if there is any receive either. Hard to tell. No movement on the meter, but with no speaker sound??? I did hook my 2950 back up and it was very quiet. The meter was not moving at all on it either. I figured that since I had transmitt with full power on ssb and am, and with full modulation, then that part is working fine. It is not the speaker either. I belileve that something is wired up wrong, or some IC is burned out of the circuit that powers the speaker.?????

 

[hacksaw]

RADIO IS BACK FROM THE DEAD!!! Repaired!!!! One of the caps were out, replaced with 470uF 16v and works fine! Thanks everyone, and thanks to Rogerbird!!!

 

[catsknr]

RADIO IS BACK FROM THE DEAD!!! Repaired!!!! One of the caps were out, replaced with 470uF 16v and works fine! Thanks everyone, and thanks to Rogerbird!!!

I have a 2600 with the same problem, which cap was it that you replaced?
Thanks,
Gary

 

[ButtFuzz]

Connector on the back.

General Info:

PIN FUNCTIONS:
Pins 2,5, & 8 are ground, Pins 1 & 7 are Internal Speaker, 1
& 2 are External Speaker, Pins 4 & 8 are The PA Speaker, Pins
9 & 5 are CW Key, and Pins 3 & 6 are not used

 

[Rogerbird1]

Audio Caps

I have a 2600 with the same problem, which cap was it that you replaced?
Thanks,
Gary

Hello,
Replace C97 and C95 they are next to the Audio IC.
See:http://www.cbtricks.com/radios/uniden/hr_2510/graphics/hr2510_pb111ab_main_pcb.gif
Its similar to the 2600.
You should replace them with 16volt or 25 volt caps.

Make sure you have the accy jack jumper in place between pins 1 and 7, that activates the internal speaker .
See: http://rogerbird.tripod.com/accmic.htm

Roger

 

[kd0pmz]

I hate bringing up an old post but I am having a similar problem I replaced the two caps and now only when I turn the radio do I have audio for a couple of seconds and it dies off. Any ideas?