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-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of W1JCW via groups.io
Sent: Monday, February 10, 2025 8:22 PM
To: [email protected]
Subject: [ic7000] Fixing the unrepairable IC7000

This email thread has great timing. Have 3 of these awesome rigs and a previous one lost the cap. Sent it to a friend hamrepair.com in SA Texas.

Just have that failure again, now I'm inspired to fix it myself.

The components to check are 4R7 and you lost me with 20v caps? Where do they go?

I'm going to take pics of this for this group when I go through this.

73-
W1JCW
John

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Andrew Lenton
Sent: Sunday, February 9, 2025 4:28 AM
To: [email protected]
Subject: Re: [ic7000] Fixing the unrepairable IC7000

Hi,

When the two 12v tants are nearly all SC after 20 years, if one holds the power on button in for too long this takes the 4R7 resistor on the underside of the logic power supply board. The resistor is 5125 1 Watt device.


I have had over 10 units with this fault some 20v caps will fit

73

Andrew
73

Andrew

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On 9 Feb 2025, 04:39, at 04:39, "(( KT6LN )) via groups.io" <ke6tln@...> wrote:

This is very insightful and inspiring, Craig.

Thank you for sharing your experiences.

ismail


On Sat, Feb 8, 2025, 06:09 Craig- KB4RU via groups.io <ki4coa=
[email protected]> wrote:

Hey everyone,

I am new to this group and I am in the process of repairing a few
IC-7000s. One was given to me by my grandfather and the other was my

dad's

that failed and was deemed irreparable due to parts being

unavailable.

Turns out my dad's IC-7000 was actually my grandfather's (KB4NZJ's).

My

grandfather passed away a few years ago and his IC-7000 became a

donor

radio to fix mine, but after finding out the history, I am determined

to

fix it. My radio had the dreaded click-click problem no turn on

problem.

My grandfather's, wouldn't turn on, I never tried it, but was listed

with

Bad Main Board, Bad Logic Board, and Bad DDS Module. My desire to

fix it

was originally to learn a new skill and do something nice for my dad,

but

after finding out the story behind the radio, its more sentimental.

*KB4RU (IC-7000 Fix)*
My radio was repaired once before but after about a year, it failed
again. I found once I pulled apart the display unit, the Capacitors

that

were supposed to be 100uf 16v were actually 47uf 25v. I was afraid

this

took out parts in my radio and after tearing it apart and checking it

over,

I found nothing appearing damaged. Pulled apart the other display

unit and

turns out the screens were switched at some point between the radios.

Put

the other screen on mine, and it came back to life. Thank god, easy

fix

for the first one. Replaced the Capacitors with the correct ones and

the

other display unit now works and turns the radio on. Looks like one

of the

2 caps failed. FYI, Digikey lists 100uF 20v as an upgrade for the

caps,

they are slightly too thick and create a bulge in the back of the

display

case. Stick to the 16v.

*Onto the second radio. KB4NZJ (Silent Key) IC-7000* Display Board-
This is the older IC-7000, the display board above had

the

47uf 20v Caps described above. Replaced caps and its working as it

should

now.

Main Board- I thought I had a burned resistor and failed cap near the
logic board connection point. Cleaned the char off and found a burnt

trace

going to the connector. I attempted to bridge the trace and the wire

kept

shifting to the space between the pins. I tried to remove the

connector and

make a new trace, but everything kept moving around it kept getting

worse

until I ended accidently pulling up the whole trace. After several

hours

trying to make something work, I gave up and ordered a new main board

for

now. Eventually, I will try to cut and make a new trace to keep the
mainboard as a spare. Surface mount PCB repairs and overall radio

repairs

is a new learning experience for me.

Logic board- Found a burned inductor on the back side of the logic

board.

Replaced the inductor and logic board appears to be working again! I
tested it in my radio and it powered up and appeared to be working

normally.

DDS- Says No RX, No TX. I have looked all over it with magnifying

glass

and have not found anything appearing damaged. I haven't poked

around with

the multimeter yet, but I decided to start with the Main Board and

Logic to

see if I can get it to power on, then try the DDS board. I am not

sure how

it was tested to determine it was no good. May have originally come

out of

my radio, but I am not sure which part came from which radio

originally

anymore.

*Inspiration for others.*
Hopefully this helps someone else have some hope in restoring their
IC-7000 and keeps a few more of these wonderful radios alive. I will

post

up some pictures of the projects later on. I never attempted to

repair

these myself before because it was outside of my comfort zone and

something

I never did before. However, I had the option of try it and see what
happens and learn something new or give up on the radio and let it

sit in

the attic. Glad I did. A lot of this is easier than I expected, and

I am

learning a lot as I go along. I have minimal experience fixing

radios and

by no means an expert in soldering or electronics repair. My dad

taught me

the basics and I learned the rest on YouTube. So, don't give up. If
you're determined enough, it can be done.