[ICOM] ICOM 706 MK IIG

[KK2DOG in NY]

I had the same problem and evidently it was the loss of "HV" voltage as described here:


    https://www.n1eq.com/icom-ic-706mkiig-tech-notes/

ICOM IC-706MKIIG Tech Notes – Icom Amateur (Ham) Radio Repair<https://www.n1eq.com/icom-ic-706mkiig-tech-notes/>
www.n1eq.com
Loss of “HV” voltage: If your IC-706MKIIG will not power up (and you’ve ruled out the DC cable and power supply), check the state of the “HV” line.






________________________________
From: icom-bounces at mailman.qth.net <icom-bounces at mailman.qth.net> on behalf of John King via Icom <icom at mailman.qth.net>
Sent: Sunday, May 13, 2018 10:55 AM
To: ICOM Reflector
Subject: [ICOM] ICOM 706 MK IIG

Recently, I posted a request for technical help with my Icom 706 MKIIG  on the reflector and got ONLY ONE  response and it recommended that I send it to a repair facility for repair. I don't want a repair facility. I have been Licensed for 60 years, hold a 20 WPM Extra Class License and what was originally called a First Class Radiotelephone  license I used in the Broadcast industry.

It seems that this reflector may only have Walkie Talkie operators and generally non technical memorized study material  Hams.

I have three large rooms full of gear on the shelves from before WWII until present. I measure it by the tons. I personally work on some of it every day. I will soon be 80 years old and have little respect for button pushing programmers and Walkie Talkie operators. That is why I always state in my request for input "based upon your personal knowledge and personal experience" with the particular piece of radio gear.

I have confirmed that the suspected broken trace on the PLL board is not broken or suffering from oxidation . I used a Fluke Ohmeter to verify that the trace was not open and that there was no  damage from chemical reaction.  I cleaned the area with alcohol, inspected it with magnifying glass and coated the area with Plasticoat.  I reassembled the radio. and it still would not fire up. There is a fuse on the board that is GOOD.

I next purchased a NEW Connector and installed it in the front panel "head" of the radio and it still will not fire up.

Before it stopped firing up. it would turn on intermittently and the intermittent firing up increased in frequency until the point when the radio would not turn on at all.
I suspected the connector because when it first became intermittent at turning on, I could remove the front and replace and it would turn on.

There was No catastrophic failure such as buzzing or smoking. Out of a clear blue sky one day, it just wouldn't come on. I have no plans at this time to send it for repair anywhere. I am still trouble shooting it.

Thanks and 73,

John, K5PGW  "GROUCHY and IMPATIENT"
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