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Re: [IC-7000] Re: Front panel troubleshooting

 

Hi Paul
I have a 7000 with no audio on rx and will not tx.
I think its the logic board
are these boards available?
james
Re: IC-7000 no rx and no sound out from speaker

 

IC551

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Re: IC-7000 no rx and no sound out from speaker

 

James, Keep up the good work. Keep us posted. We all appreciate your information.
Bob W4JFA

On Thu, Oct 31, 2024 at 5:52?AM James Tiberius via <nono2212000=[email protected]> wrote:
Checked? CW tx using keyer input and radio not going into TX mode .more work to do ....
Re: IC-7000 no rx and no sound out from speaker

 

Checked? CW tx using keyer input and radio not going into TX mode .more work to do ....
Re: IC-7000 no rx and no sound out from speaker

 

Hi Geoff
looks like dds 2nd osc is ok at 124.032 and 1st local osc varies with tuning knob so looks like front end might be ok and the dsp board may be the culprit.
i need to confirm signal present at dds input. the dds board takes care of the signal strength display and also passes audio to the audio amplifier.
I haven't checked TX yet but will hopefully get around to that soon
James
Re: IC-7000 no rx and no sound out from speaker

 

Hi James,
?
If you confirm the audio amp is ok then you need to look further back. At least now you know that if you fix an upstream fault you should hear something.
?
The fact that you acquired this 7000 recently and it has never worked from when you got it, you can't rule out that someone before you has had a go at fixing it. It's worth seeing if the synthesiser is working.
?
I recall you saying that you saw no S meter bar graph on the display when you turned the rf attenuator/mute throughout its entire range. I would now look at the DDS adjustment procedure that appears in the 7000 Service Manual and see if the reference freq is correct at 124.032000Mhz. If not follow the procedure carefully and you should be able to get it within a few Hz of the correct value.
?
Geoff
?
?
Re: IC-7000 no rx and no sound out from speaker

 

tried with an earphone in the headset socket top rhs next to band switch ??

On Wednesday 30 October 2024 at 10:00:35 GMT+13, James Tiberius via groups.io <nono2212000@...> wrote:


Hi all
I recently acquired a second hand 7000 with what looks like a fault.
It powers on and all front panel controls seem to be ok but when i apply a signal on any band there is no rx indication and no sound from speaker even when squelch is off.
Any advice would be much appreiated
James
Re: IC-7000 no rx and no sound out from speaker

 

Hi Tommy
i have been checking the TRX videos -they are good
thanks
james
Re: IC-7000 no rx and no sound out from speaker

 

Hi J.D
yes will try TX tonight
james
Re: IC-7000 no rx and no sound out from speaker

 

Thanks Bob
good point - will try tonight
james
Re: IC-7000 no rx and no sound out from speaker

 

Late to reading this thread, but have you tried a full reset to see if that makes a difference?
Other than that it may be time to troubleshoot the radio.
Does it transmit on any mode into a dummy load?
If so that would indicate that the RF section is "mostly" working as it is shared between the RX and TX.
Then look at the signals along the receive chain with a 'scope.
Sometimes it just takes having the right equipment and techniques.
Re: IC-7000 no rx and no sound out from speaker

 

James
Checkout this troubleshooting for ¡°no audio¡± from TRX LABS
Tommy KF4RWG

On Wed, Oct 30, 2024 at 8:26?AM Bob via <W4JFABob=[email protected]> wrote:
You need to check transmit. You said you had no mic so put the radio on CW, turn on break in, insert a plug into the key jack. With dummy load, do u get a carrier?

This will narrow it down to TX and/or RX.

Bob W4JFA?

On Wed, Oct 30, 2024, 5:44 AM James Tiberius via <nono2212000=[email protected]> wrote:
Hi Joe
Yes checked squelch and rf gain and associated menu settings
No joy so currently probing around the circuitry to see if any clues?
Re: IC-7000 no rx and no sound out from speaker

 

You need to check transmit. You said you had no mic so put the radio on CW, turn on break in, insert a plug into the key jack. With dummy load, do u get a carrier?

This will narrow it down to TX and/or RX.

Bob W4JFA?

On Wed, Oct 30, 2024, 5:44 AM James Tiberius via <nono2212000=[email protected]> wrote:
Hi Joe
Yes checked squelch and rf gain and associated menu settings
No joy so currently probing around the circuitry to see if any clues?
Re: IC-7000 no rx and no sound out from speaker

 

Hi Joe
Yes checked squelch and rf gain and associated menu settings
No joy so currently probing around the circuitry to see if any clues?
Re: IC-7000 no rx and no sound out from speaker

 

I got into this thread midstream.? Did you check the setting of the SQ/RF control and the setting of Set Mode 7?? Maybe someone else covered this but it may be something simple.

73, Joe, K1ike
Re: IC-7000 no rx and no sound out from speaker

 

Hi Geoff
Yes I will take your approach. I think the audio output is accessable and a good place to start to check for supply voltage.
James?
Vk2vjz
Re: IC-7000 no rx and no sound out from speaker

 

James, I'm not a fan of the shot gun approach to fault finding.

Start from a known point of trouble, in this case it's the audio output. Using the circuit schematic it would be my suggestion to start by checking the voltage rails on the active devices at that point working back "upstream". If you have a audio generator of any type, use a 0.1uf? to feed a signal into the inputs of the devices as you go back.


Geoff
VK3 ZGW

On Wed, 30 Oct 2024, 14:23 James Tiberius via , <nono2212000=[email protected]> wrote:
Hi Rick
Yes that's pretty much what I did .
It reset everything back to defaults but still no Rx or audio?
Just dead?
?
Looks like I need to open it up and check all the regulators?
Thanks for your help?
James?
Re: IC-7000 no rx and no sound out from speaker

 

Hi Rick
Yes that's pretty much what I did .
It reset everything back to defaults but still no Rx or audio?
Just dead?
?
Looks like I need to open it up and check all the regulators?
Thanks for your help?
James?
Re: IC-7000 no rx and no sound out from speaker

 



On Tue, Oct 29, 2024 at 7:49?PM James Tiberius via <nono2212000=[email protected]> wrote:
Hi Rick
What's the procedure for full reset?
James?
Re: IC-7000 no rx and no sound out from speaker

 

Hi Neil
Tried just about everything as you mentioned. Looks like a hardware issue . The only thing I haven't tried is a full reset?
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