Re: [IC-7000] Re: Front panel troubleshooting
Geoff, These posts on troubleshooting are interesting, not annoying. They're good reading. Bob W4JFA
James,
The datasheet for IC551 is on the internet and maybe worth a look.
You say you have the analogue signal at IC551 is it pin 4. Can you see anything at R611, R615, or the filter device IC601 pin 5.
Do you see a digital signal from IC551 pin 13? Do you have a logic analyser you could use?
Maybe we can continue off Group to save annoying others. My callsign + gmail.
Cheers
Geoff
On Mon, Nov 4, 2024 at 8:35?AM James Tiberius via <nono2212000= [email protected]> wrote: Thanks PaulYes that's expensive. Looking for a parts radio now Regards? James? On Mon, Nov 4, 2024 at 8:34 AM, Paul Hansen
Logic units have been a
relatively high failure item. Icom never even attempted to repair them except
for the CI-V components. The latest price list I have from Icom does list the
part as being available. It’s US$353.29. Ouch!
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Hi Paul
Yes just wanted to reach out to see if you have any
experience with the logic board on the 7000
My 7000 could have the fault?
James?
?
On
Sun, Nov 3, 2024 at 10:13 PM, Paul Hansen
Is
this for me?
?
Thank
You
?
Paul
W. Hansen, W6XA
Amateur
Radio Service
2134
Carthage Road
Tucker,
GA 30084
(864)
222-3539
?
?
I have a 7000 with no audio on rx and will not
tx.
I think its the logic board
are these boards available?
|
I recently bought an IC-7000.? During my very first QSO (on QRP 70cm CW) my QSO partner (Chris GU3TUX) noticed frequency jumps at the start of each of my transmissions.? He kindly informed me, and I found the article by Daniel SM6VFZ via a Google search.
I also heard the frequency jumps when listening to GU3TUX after a TX-to-RX transition (when I went from TX to RX).
?
I inserted a small piece of 10 mm thick medium density foam to fill the gap between the TCXO and the rear heat sink, and which filled the small gap between the side of the fan and the edge of the PCB.? ? No adhesive was needed: only the gentle pressure as the PCB was screwed back into position.? Initial tests in the shack indicate a complete resolution of the drifting/jumping issue.? I am very pleased? :-)
Thank you, Daniel SM6VFZ!
|
Re: [IC-7000] Re: Front panel troubleshooting
Hi Geoff
Nothing out of IC551 pins 25 and 26 which feed IC601 , ic601 is underneath so very hard to get to but checked on ic551 pins 25 and 26 and nothing at all with a good clean signal on pin 4. i haven't checked pin 13 on 551 yet but will try and get to it by the end of the week. Also thinking about ordering another chip to replace ic551 - they are relatively cheap and worth a shot. If it doesn't fix the problem then the issue lies somewhere else
James
|
Re: [IC-7000] Re: Front panel troubleshooting
James,
The datasheet for IC551 is on the internet and maybe worth a look.
You say you have the analogue signal at IC551 is it pin 4. Can you see anything at R611, R615, or the filter device IC601 pin 5.
Do you see a digital signal from IC551 pin 13? Do you have a logic analyser you could use?
Maybe we can continue off Group to save annoying others. My callsign + gmail.
Cheers
Geoff
On Mon, Nov 4, 2024 at 8:35?AM James Tiberius via <nono2212000= [email protected]> wrote: Thanks PaulYes that's expensive. Looking for a parts radio now Regards? James? On Mon, Nov 4, 2024 at 8:34 AM, Paul Hansen
Logic units have been a
relatively high failure item. Icom never even attempted to repair them except
for the CI-V components. The latest price list I have from Icom does list the
part as being available. It’s US$353.29. Ouch!
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Hi Paul
Yes just wanted to reach out to see if you have any
experience with the logic board on the 7000
My 7000 could have the fault?
James?
?
On
Sun, Nov 3, 2024 at 10:13 PM, Paul Hansen
Is
this for me?
?
Thank
You
?
Paul
W. Hansen, W6XA
Amateur
Radio Service
2134
Carthage Road
Tucker,
GA 30084
(864)
222-3539
?
?
I have a 7000 with no audio on rx and will not
tx.
I think its the logic board
are these boards available?
|
Re: [IC-7000] Re: Front panel troubleshooting
Thanks Paul Yes that's expensive. Looking for a parts radio now Regards?
On Mon, Nov 4, 2024 at 8:34 AM, Paul Hansen <pwhansen@...> wrote:
Logic units have been a
relatively high failure item. Icom never even attempted to repair them except
for the CI-V components. The latest price list I have from Icom does list the
part as being available. It’s US$353.29. Ouch!
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
www.amateurradioservice.com
?
?
Hi Paul
Yes just wanted to reach out to see if you have any
experience with the logic board on the 7000
My 7000 could have the fault?
James?
?
On
Sun, Nov 3, 2024 at 10:13 PM, Paul Hansen
Is
this for me?
?
Thank
You
?
Paul
W. Hansen, W6XA
Amateur
Radio Service
2134
Carthage Road
Tucker,
GA 30084
(864)
222-3539
www.amateurradioservice.com
?
?
I have a 7000 with no audio on rx and will not
tx.
I think its the logic board
are these boards available?
|
Re: [IC-7000] Re: Front panel troubleshooting
Logic units have been a
relatively high failure item. Icom never even attempted to repair them except
for the CI-V components. The latest price list I have from Icom does list the
part as being available. It’s US$353.29. Ouch!
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
www.amateurradioservice.com
?
toggle quoted message
Show quoted text
From: [email protected]
[mailto:[email protected]] On Behalf Of James Tiberius via groups.io
Sent: Sunday, November 3, 2024 20:48
To: [email protected]
Subject: Re: [ic7000] [IC-7000] Re: Front panel troubleshooting
?
Hi Paul
Yes just wanted to reach out to see if you have any
experience with the logic board on the 7000
My 7000 could have the fault?
James?
?
On
Sun, Nov 3, 2024 at 10:13 PM, Paul Hansen
Is
this for me?
?
Thank
You
?
Paul
W. Hansen, W6XA
Amateur
Radio Service
2134
Carthage Road
Tucker,
GA 30084
(864)
222-3539
www.amateurradioservice.com
?
?
I have a 7000 with no audio on rx and will not
tx.
I think its the logic board
are these boards available?
|
Re: [IC-7000] Re: Front panel troubleshooting
Hi Paul Yes just wanted to reach out to see if you have any experience with the logic board on the 7000 My 7000 could have the fault? Regards
On Sun, Nov 3, 2024 at 10:13 PM, Paul Hansen <pwhansen@...> wrote:
Is this for me?
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
www.amateurradioservice.com
?
?
I have a 7000 with no audio on rx and will not tx.
I think its the logic board
are these boards available?
|
Re: IC-7000 no rx and no sound out from speaker
Hi Tommy
Not sure, the audio in and out of this IC also go through the DSP.
The fact that no audio passes through this chip Rx or tx either means a complete failure of ic551 or the DSP has some issue which is going to be hard to find given the board is only accessible on one side.
I could try to obtain ic551 and replace it but I think if I can get a spare board it might be an easier option
James?
Vk2vjz
|
Re: IC-7000 no rx and no sound out from speaker
James Did you conclude IC551 is bad? Tommy KF4RWG
On Sun, Nov 3, 2024 at 3:54?AM James Tiberius via <nono2212000= [email protected]> wrote: looks like the logic board is faulty.
looking for a replacement now
TBC
|
Re: [IC-7000] Re: Front panel troubleshooting
Is this for me?
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
www.amateurradioservice.com
?
toggle quoted message
Show quoted text
From: [email protected]
[mailto:[email protected]] On Behalf Of James Tiberius via groups.io
Sent: Sunday, November 3, 2024 08:53
To: [email protected]
Subject: Re: [ic7000] [IC-7000] Re: Front panel troubleshooting
?
I have a 7000 with no audio on rx and will not tx.
I think its the logic board
are these boards available?
|
Re: IC-7000 no rx and no sound out from speaker
looks like the logic board is faulty.
looking for a replacement now
TBC
|
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
|
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
|
Bob
Steve G4ALG
