[ICOM] R71A Problems

[Gary P. Fiber]

Sounds like the ram programming is gone. The battery of around 3 VDC 
keeps the ram alive.  Another thing to check for a cracked solder joints 
around the connectors on the ram unit.

Did the R-71A work, show correct frequencies before you replaced the 
battery?
Did you measure the battery voltage while it was still attached to the 
ram unit? Was it at the 0.3 volts DC you mentioned it was at when you 
removed it?

There are replacement ram units available, mostly a eeprom these days. I 
am unsure if Icom still can reprogram those ram units, you could contact 
them also.


Gary K8IZ

On 4/8/2011 9:08 AM, Gary H. Harmon, Jr. wrote:
> I have a friend's R71A on the bench and before I get too crazy I thought I
> would check the list.  I replaced the battery IAW instructions on the web.
> The removed battery measured 0.3 volts.  It comes on with a frequency
> display of either 466.666.6 or 666.666.6.  There is a little hum in the
> speaker but no rushing noise.
>
>
>
> Are there any other obvious issues to check?  Is there a service manual
> available online?
>
>
>
> Vr,
>
>
>
> Gary H. Harmon, Jr. - K5JWK
>
> 6003 Archwood
>
> San Antonio, TX 78239-1504
>
> 210.657.1549h / 210.884.6926c
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>
>
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-- 
Gary P. Fiber K8IZ

General Radio Telephone Operators License PG-19-6691,
with Shipboard Radar Endorsement.
Washington State Resident.

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