Date   

Re: IC-7000 x2 transmitts on mic while on data send

Steve W3AHL
 

Page 116 is correct when connecting to the DATA port.  When using the ACC port, if there is a mic plugged into the front or rear mic jack any audio in the room will be mixed with the data audio stream.  There is no way around that except to disconnect the mic or use a mic that doesn't always have its audio active, even if its PTT is not active.

Use the DATA port instead.  It requires a higher audio signal level, which also makes it less prone to RFI, compared to the ACC port.

For higher speed data (Pactor, Winmor) many 7K users put a 56K resistor in series with the audio input to the ACC jack (inside the 13-pin DIN connector shell, so it is shielded), which accomplishes the same thing.

Steve, W3AHL


---In ic7000@..., <mystictreg@...> wrote :

​I am sending data though the 13-pin data connection using a signal link.



According to page 116 of the manual, (screen shot follows, and is attached):

[image: Inline image]

"When the PPT P goes to ground, it will disconnect the pin 6 of [mic]."

However, it seems to not be doing this - when the system transmits, it also
transmits the mic, so there is an audio feed over and interfering with the
data feed.

Is there a setting on the IC-7000 that I am missing? I have two radios,
both do it, same SignalLink USB, doesn't matter if [MIC] is on the face or
back.

Has anyone else solved this problem?




J Tregre,
KD8M,
on behalf of
Her Imperial Majesty,
Mystic, Kitty



[Non-text portions of this message have been removed]


Re: IC-7000 x2 transmitts on mic while on data send

Steve W3AHL
 


Re: I need a Logic board and ribbon cables

Tom Courtney
 

Did a bit more on the radio today removed all boards and removed all ribbon cables as I don't have access to new cables, I thought I would try something, I carefully trimmed a millimetre off the end of each ribbon cable so when I push them home the contacts will seat on virgin cable this has worked out great now I have solid video on the head screen one problem fixed just need a logic board now. Tom VK4DDG


IC-7000 x2 transmitts on mic while on data send

Mystic Treg
 

​I am sending data though the 13-pin data connection using a signal link.



According to page 116 of the manual, (screen shot follows, and is attached):

[image: Inline image]

"When the PPT P goes to ground, it will disconnect the pin 6 of [mic]."

However, it seems to not be doing this - when the system transmits, it also
transmits the mic, so there is an audio feed over and interfering with the
data feed.

Is there a setting on the IC-7000 that I am missing? I have two radios,
both do it, same SignalLink USB, doesn't matter if [MIC] is on the face or
back.

Has anyone else solved this problem?




J Tregre,
KD8M,
on behalf of
Her Imperial Majesty,
Mystic, Kitty


Re: IC7000 transmits, puts out power, no audio

 

I get a very small signal on my TEM TAS645 at pin 3 or more properly at R1310 ,but I think it is too small.
The big cap C2610 is hotter than I would expect, but it behaves like a good cap when removed and checked with a meter.
I think I will have to trace the signal back to the audio circuits and see where it is going south.
I did notice that the fan runs as soon as I key on the transmitter.
The other radio does not run the fan until the finals heat a little.
I also noticed that the ALC is pegged out when on SSB and not on CW and RTTY.
The power might be folded back on SSB and this might be connected with the fan running.
It puts out full power an RTTY.
The COM bar graph modulates with voice.
Even with the power cut way back this is what happens 
With the power turned back on RTTY and FM it still puts out full (or close) to full power.


Re: IC7000 transmits, puts out power, no audio

Steve W3AHL
 

So it sounds like the DSP circuits are OK on the Logic board.  I forgot to ask if you had receive audio, if so most of the IF circuits are working.  If you do, then I would look at the TX audio into the 3rd IF mixer, IC1301.  It is located on the top side of the Main board and easily accessed with a scope probe.  In the Service Manual it is shown in the first Inside View photo, midway down on the left side as TX 3rd Mixer.  

Refer to the Main board schematic for IC1301 pin out.  Pin 1 is the 3LO at about 438 KHz.  Pin 3 is audio from the DSP.  Pin 5 is the 455 KHz output to the 2nd IF mixer.

If you have a scope you should be able to trace the signals through the IF, until the frequency gets too high.  If you don't see audio at IC1301-3 when you speak into the mic with PTT enabled in USB mode, then the problem is probably in the Logic card or its stacking connectors to the main board.

Sometimes a good visual inspection with strong light and a magnifier will reveal the problem easier than trying to scope the signals.   Use static (ESD) protection anytime you are working or handling the boards.

Let us know what you find.

Steve, W3AHL

---In ic7000@..., <jeter.d.barron@...> wrote :

Yes to all the monitor also works.
The recorder works and plays back
There may be a little modulation on the AM,I can't tell about the FM
No ALC on talking into the mike even with the gain all the way up.


Re: I need a Logic board and ribbon cables

allgyer@...
 

I have successfully repaired Logic Boards in the past including one with these symptoms and one that needed a new CPU. Would be happy to have a go at this one or to buy the whole 7K. QRZ has my particulars.

Warren Allgyer - WA8TOD


I need a Logic board and ribbon cables

Tom Courtney
 

Hi I purchased a dead 7K and the radio s/n 28010xx does power up but didn't post, so I removed the logic board and noticed it has a popped chip with a small piece missing its IC1218 on the underside of the logic board, I tried the head on my other 7K and it works fine, so I tried my good logic can in the broken radio, it 

powered up and posted, band switching is OK and Mode switching is OK and looks promising but the video on the screen is running sideways and is not readable, I have read thru the posts and a problem like this was mentioned with faulty ribbon cables, this is an export PAL type with the 4.43 ref Xtal, but a NTSC Logic board will be fine as I can change the rock. Anybody got a good Logic Board that they will sell?  Thanks in advance Tom VK4DDG


Re: IC7000 transmits, puts out power, no audio

 

I have done those things and it does everything that yu asked about except for the ALC or any SSB modulation.
I have tried to post, but it doesn't seem to post


Re: IC7000 transmits, puts out power, no audio

 

Yes to all the monitor also works.
The recorder works and plays back
There may be a little modulation on the AM,I can't tell about the FM
No ALC on talking into the mike even with the gain all the way up.


Re: IC7000 transmits, puts out power, no audio

 

The VOX works as well.


Re: IC7000 transmits, puts out power, no audio

 

I can see some wiggle on the power in AM, but I don't know how much modulation there might be there.
I can hear the monitor if I turn it on and up so there is modulation audio getting at least that far.


Re: IC7000 transmits, puts out power, no audio

 

  1.  Have you done a CPU reset (p. 25 of manual)?  --- YES I tried that this AM
  2. Does the red TX LED come on when you PTT?  ___ YES It has always lit the TX LED
  3. In FM mode do you get full TX power out? --- YES with AM as well, but no modulation
  4. In SSB mode is there any ALC activity when you do a loud AHHHH into the mic.  What about if the mic gain is increased to max? - MIke gain all the way up no output in SSB
  5. If you Record a Voice Message for Transmit (p.96 of manual) and play it back to confirm, is there any audio locally through the speaker?  --- Yes I can record a message and play it back I can see the meter go up and down with modulation.
Any guesses as the why the SSB modulation (And AM and I don't know if the FM is or not)
The unit will output power on RTTY and CW.


Re: IC7000 transmits, puts out power, no audio

Steve W3AHL
 

  1.  Have you done a CPU reset (p. 25 of manual)?
  2. Does the red TX LED come on when you PTT?  
  3. In FM mode do you get full TX power out?
  4. In SSB mode is there any ALC activity when you do a loud AHHHH into the mic.  What about if the mic gain is increased to max?
  5. If you Record a Voice Message for Transmit (p.96 of manual) and play it back to confirm, is there any audio locally through the speaker? 
Steve, W3AHL

---In ic7000@..., <jeter.d.barron@...> wrote :

I have two IC7000s that I bought in unknown condition and neither worked.

I fixed them both since the front panel killed the +8 volt series resistor feeding the regulator.

One works OK with the one face plate I fixed and the other I thought was working,  but it outputs no audio when the mike is connected to either the front panel or the jack in the rear.

The mike drive is set just like the other unit, but no joy.

Any ideas where to start?

I assume I need to start at the mike and work my way into the radio.

Someone have a common area to check first?


Thanks,


KE4MD


IC7000 transmits, puts out power, no audio

 

I have two IC7000s that I bought in unknown condition and neither worked.

I fixed them both since the front panel killed the +8 volt series resistor feeding the regulator.

One works OK with the one face plate I fixed and the other I thought was working,  but it outputs no audio when the mike is connected to either the front panel or the jack in the rear.

The mike drive is set just like the other unit, but no joy.

Any ideas where to start?

I assume I need to start at the mike and work my way into the radio.

Someone have a common area to check first?


Thanks,


KE4MD


Anyone got an IC-7000 for sale in the UK

Ade Mc
 

Looking for an IC-7000 to take with me to ZC4 in a few weeks if anyone in the UK has one for sale please pop me a message over


Adrian G0KOM




Re: [IC-7000] IC7000 Front panel kills 8 Volt series resistor

Tom Courtney
 

I had a simular problem with a 7k I bought, it was DOA.

On turning it on I noticed the back light on the mic was very dim if plugged into the head, if the mic was plugged into the back it was much brighter but was only on for a moment before the cpu would sense a fault and shut down,

The fix was replacing the large Chip filter caps on the front panel one had gone short and was pulling the rail down, I replaced both of them, Good luck Tom VK4DDG

 

Sent from Mail for Windows 10

 


Re: [IC-7000] IC7000 Front panel kills 8 Volt series resistor

 

Thanks for the info.
They are not shorted, but the resistance on the line is lower than the other one and does not "charge" like the other.
I ordered replacement 7805 but the case is larger than the one I thought I was buying.
The 7808s I bought were correct
I need a few more parts from Icom for the head as well.
At least the other head is working and it doesn't smoke the 4.7 ohm resistor on the main board.
I am checking out the rig and antennas and getting back on the air after many many years off the air.


Re: [IC-7000] IC7000 Front panel kills 8 Volt series resistor

k4pwo <k4pwo@...>
 

The filter electrolytic caps on the 8-volt line in the head are famous for shorting.

Perry K4PWO 



Sent from my Sprint Samsung Galaxy S7 edge.

-------- Original message --------
From: "jeter.d.barron@... [ic7000]" <ic7000@...>
Date: 10/3/17 12:31 PM (GMT-06:00)
To: ic7000@...
Subject: [IC-7000] IC7000 Front panel kills 8 Volt series resistor

I have two IC7000 bought at an estate sale and bot were DOA when tested.

I found on one unit the series 4.7 Ohm resistor was bad and replaced it and turned the unit on after replacing it blew again. The 7808 was OK so I fed it a second resistor and tried the front panel from the second radio and the unit quit clicking and shutting down an booted up.

This panel has a bad headphone jack and has no audio out.

I tried the other panel and "tested" the resistor again.

I wonder if anyone else had had experience with this.

The DC resistance on the 8 volt line is 980 Ohms and clipping the lead on the 7805 makes no difference.

Any other thoughts?

By the way to troubleshoot this problem I added two wires to the working front panel to be able to read the 8 and 5 volt levels at the 7805 in that panel.

The bad one zapps the regulator resistor before one can check anything of course.

Any particular parts to look at and save some hacking about?


Thanks 

KE4MD


IC7000 Front panel kills 8 Volt series resistor

 

I have two IC7000 bought at an estate sale and bot were DOA when tested.

I found on one unit the series 4.7 Ohm resistor was bad and replaced it and turned the unit on after replacing it blew again. The 7808 was OK so I fed it a second resistor and tried the front panel from the second radio and the unit quit clicking and shutting down an booted up.

This panel has a bad headphone jack and has no audio out.

I tried the other panel and "tested" the resistor again.

I wonder if anyone else had had experience with this.

The DC resistance on the 8 volt line is 980 Ohms and clipping the lead on the 7805 makes no difference.

Any other thoughts?

By the way to troubleshoot this problem I added two wires to the working front panel to be able to read the 8 and 5 volt levels at the 7805 in that panel.

The bad one zapps the regulator resistor before one can check anything of course.

Any particular parts to look at and save some hacking about?


Thanks 

KE4MD

1961 - 1980 of 41451