RE: Battery - I Sit Corrected

"Dave Hartman [email protected] [YaesuVR-5000]" <[email protected]> Sat, 11 Feb 2017 12:32:17 -0500
Newsgroups gmane.recreation.radio.hardware.yaesu.vr-5000
Message-ID <[email protected]>
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Since I'm sitting right now, I sit corrected!  Upon much closer 
inspection, I did indeed find a battery in mine. Firmly stuck onto the 
back of the front panel assembly. It was very well hidden. I have yet to 
locate it on any of the schematics I have. If I can locate the service 
manual I will look there also. It was stuck on with double sided tape 
AND some sort of white glue that did not want to let go of the circuit 
board, but with a hot air rework too set to 250F it softened enough to 
scrape off. The voltage of the one I removed was whopping 1.2V so it 
still had 1 cell alive. No wonder the clock always needed to be reset 
after the power went out. Rather than have to go through the disassembly 
again in the future, i installed some wires so I can locate a future 
battery somewhere easier to get to. I was going to use a small 5V .o3F 
super cap for backup, but decided against that when I measured the 
voltage that charges the battery at 9.9V. I did not measure the charging 
current, but might do that later in my -spare- time.

I also noted some jumper wires tacked onto an electrolytic cap on the 
front assembly running to a much larger cap glued to the rear of the 
chassis with what looks like the same sort of glue. Is that a common 
thing, a factory afterthought, a mod, or what...
Dave - AC2GL

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      <p>Since I&#39;m sitting right now, I sit corrected!  Upon much closer <br>
inspection, I did indeed find a battery in mine. Firmly stuck onto the <br>
back of the front panel assembly. It was very well hidden. I have yet to <br>
locate it on any of the schematics I have. If I can locate the service <br>
manual I will look there also. It was stuck on with double sided tape <br>
AND some sort of white glue that did not want to let go of the circuit <br>
board, but with a hot air rework too set to 250F it softened enough to <br>
scrape off. The voltage of the one I removed was whopping 1.2V so it <br>
still had 1 cell alive. No wonder the clock always needed to be reset <br>
after the power went out. Rather than have to go through the disassembly <br>
again in the future, i installed some wires so I can locate a future <br>
battery somewhere easier to get to. I was going to use a small 5V .o3F <br>
super cap for backup, but decided against that when I measured the <br>
voltage that charges the battery at 9.9V. I did not measure the charging <br>
current, but might do that later in my -spare- time.<br>
<br>
I also noted some jumper wires tacked onto an electrolytic cap on the <br>
front assembly running to a much larger cap glued to the rear of the <br>
chassis with what looks like the same sort of glue. Is that a common <br>
thing, a factory afterthought, a mod, or what...<br>
Dave - AC2GL<br>
</p>

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        Posted by: Dave Hartman &lt;[email protected]&gt;        <hr style="height:2px ; border-width:0; color:#E3E3E3; background-color:#E3E3E3;">
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