LOW sound VOLUME from a PRO-38 scanner

B

B Ghostrider

Guest
Hi there
A friend of mine asked me to look at his Pro-38 portable
scanner which he was having a problem with low volume levels. Not
being a electronic wiz I did my best to see what I could find out. I
first tried a external speaker thinking that the internal one was
shot. No joy. I then carefully opened the unit up and did a visual
inspection of what compondent i could identify any hint that a
compondent had visually failed. No luck. I then identified and
resoldered the solder points for the speaker, volume pot. and the
earphone jack. Again no luck. the last thing I could think of wa to
soak the volume pot with contract cleaner. I tried to get to cleaner
in side so it would get to the wiper in the the pot. . Again no luck.
i have given the scanner back to my friend and told him that he may
try and get a new one but because Radio Shack Canada nolonger is
selling scanners and there is no local dealers at carry scanner his
opions are not good. I am still trying too find a solution for this
problem but am running out of ideas. The only other thing that I have
yet to try is a small ampified speaker that Radio Shack has but
because he uses this unit "portable" , I am not sure weather he will
go for packing around more stuff along . Does Any one have have any
more ideas?
 
Find out who made the scanner for RS, and send it there for proper service.
These are difficult for the novice to troubleshoot, and many of the
manufactures will not sell service manuals or the spare parts to outside
servicers.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"B Ghostrider" <Barryufp@hotmail.com> wrote in message
news:0afe90dqb12j56jknc64cini8cg9fp7l0q@4ax.com...
Hi there
A friend of mine asked me to look at his Pro-38 portable
scanner which he was having a problem with low volume levels. Not
being a electronic wiz I did my best to see what I could find out. I
first tried a external speaker thinking that the internal one was
shot. No joy. I then carefully opened the unit up and did a visual
inspection of what compondent i could identify any hint that a
compondent had visually failed. No luck. I then identified and
resoldered the solder points for the speaker, volume pot. and the
earphone jack. Again no luck. the last thing I could think of wa to
soak the volume pot with contract cleaner. I tried to get to cleaner
in side so it would get to the wiper in the the pot. . Again no luck.
i have given the scanner back to my friend and told him that he may
try and get a new one but because Radio Shack Canada nolonger is
selling scanners and there is no local dealers at carry scanner his
opions are not good. I am still trying too find a solution for this
problem but am running out of ideas. The only other thing that I have
yet to try is a small ampified speaker that Radio Shack has but
because he uses this unit "portable" , I am not sure weather he will
go for packing around more stuff along . Does Any one have have any
more ideas?
 
B Ghostrider wrote:

Hi there
A friend of mine asked me to look at his Pro-38 portable
scanner which he was having a problem with low volume levels.
Click to expand...
I have one of these.
Mine currently has low-level audio noise which I think is coming from
the DC-DC converter, haven't got around to looking at it yet ;)

There is/was a service manual listed for it, # MS2000139, so there might
be some service info around on the 'net.

You might simply try injecting an audio signal into the amp chip though,
just in case it's a fault in this area, which would be a lot easier to
fix than an RF/IF fault.

Lee
--
Email address is valid, but is unlikely to be read.
 
thank for the info. I will pass this on to my friend.

On Tue, 04 May 2004 21:30:40 +0100, Lee <cyberwitch@ukonline.co.uk>
wrote:

B Ghostrider wrote:

Hi there
A friend of mine asked me to look at his Pro-38 portable
scanner which he was having a problem with low volume levels.

I have one of these.
Mine currently has low-level audio noise which I think is coming from
the DC-DC converter, haven't got around to looking at it yet ;)

There is/was a service manual listed for it, # MS2000139, so there might
be some service info around on the 'net.

You might simply try injecting an audio signal into the amp chip though,
just in case it's a fault in this area, which would be a lot easier to
fix than an RF/IF fault.

Lee
Click to expand...
 
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