[ICOM] 7610 relay

[Ed K1EP]

Hi Adam-
Thanks for the reply. I am familiar with the Icom way of implementing the
SEND function, as I have dealt with it as far back as the first 756.  I
normally run low power, so the SEND issue usually doesn't affect me. If I
know that I will be using an amp, I will use a buffer. I have built many
for my use and for others. The situation was that I was in the Bahamas a
couple of years ago with the 7610 and it was supposed to be a LP operation
for the 7610. After a series of events, we ended up using an old tube amp
and I hadn't brought a buffer. The reed relay fused closed, which rendered
the FET useless.  I built an opto isolated relay out of junk box parts to
"save the day" and used the ACC pins. The problem now is that I want to
sell the radio and a prospective buyer won't accept the ACC solution,  no
matter how much I explain it. I would be satisfied with cutting it out if
it were easier! Thanks for the details.

reply to: K1EP at arrl.net

On Tue, Sep 28, 2021, 15:44 Adam Farson <afarson at telus.net> wrote:

> Hi Ed,
>
> The SEND relay is RL4001, a reed relay mounted on the bottom corner of the
> RF Unit board. To access the RF Unit, the Digi-Sel Units and a shield
> plate must be removed. You will need to remove the RF Unit to replace the
> relay.
>
> The IC-7610 has two menu-selectable amplifier keying options on the SEND
> RCA jack; RELAY (rated at 16V/500mA non-inductive) and MOSFET (rated at
> 250V 200mA non-inductive). Refer to IC-7610 user manual, p. 2-3. If the
> amplifier keying line exceeds these limits, an auxiliary keying buffer is
> required.
>
> You will need the service manual to perform this repair. If your 7610 is
> still under warranty, an authorised Icom service centre will take care of
> it.
>
>
> 73, Adam VA7OJ/AB4OJ
>
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
> On Behalf Of Ed K1EP
> Sent: 26 September 2021 04:48
> To: icom at mailman.qth.net
> Subject: [ICOM] 7610 relay
>
> Has anyone replaced or repaired the internal amp keying relay in a 7610?
> Is it easily accessible or do you have to remove boards because it is
> buried somewhere?
>
> reply to: K1EP at arrl.net
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