[ICOM] IC-2AT BP3 battery pack

[Gary Fiber]

Dick,

So far as I remember the battery supplied directly to the terminals 
and did not go through any semi conductors. The semiconductors were 
used for recharging the battery but out of circuit when it was 
suppling the 2AT. Probably what you will find is an open ground. Look 
on the circuit board for a burned open or corroded away ground trace.

I also remember Icom used in some of the other batteries of that 
series a small fuse between two posts in reality it was a piece of 
about # 22 wire. We used to use one strand of 16 gauge stranded wire. 
We removed the insulation and then unwound one of the several strands 
and soldered that between the two posts. Another way might to replace 
that fuse with a Pico fuse.

Icom tech support should have a schematic of the battery pack 
available but not likely the circuit board layout. A CM3 and BP3 were 
the very same battery.

Gary K8IZ

At 01:26 PM 7/10/2005, you wrote:
>After all these years my 2AT quit. Found out that the battery
>is good but no voltage on the pack plus contact. No
>schematic for the pack charger circuit but traced the
>voltage to the base of the switch transistor A1048 and it
>stops there. Charger works. Voltage is fine at the end
>terminals so trouble is definitely on the circuit board. My
>guess is the A1048 transistor (good logic, huh?!) and cannot
>find a x-ref other than NTE2036 which Mouser says "not
>found" so who has an idea?
>
>A copy of the schematic would help. If anyone has a BP3 pack
>with dead batteries I would purchase the pack for the
>circuit board if price is reasonable.
>73, Dick KF4NS
>St. Petersburg, FL 33714 USA
>Keep the glow!

Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident