Broken volume control - Garmin 340

V

ve3tjd

Guest
Hi Guys:

I'm trying to fix a Garmin 340 Street Pilot which my brother dropped.

The volume control was sheared off the board, but is still still
intact.
The problem I have is that the pad which connects to the center
terminal of the pot was torn off and it looks like the trace goes to
one of the center layers of the multi layer board.

Can anyone who has a schematic or PCB layout tell me the closest
component which this pad goes to. I would assume the center pin
of the POT goes to the audio amp input.

Thanks for any assistance.

Tedd, VE3TJD

Please reply to ve3tjd at RAC dot CA
 
"ve3tjd" <ve3tjd@gmail.com> wrote in message
news:c9b28dee-54a4-44db-9e58-142d7c14fb41@d61g2000hsa.googlegroups.com...
Hi Guys:

I'm trying to fix a Garmin 340 Street Pilot which my brother dropped.

The volume control was sheared off the board, but is still still
intact.
The problem I have is that the pad which connects to the center
terminal of the pot was torn off and it looks like the trace goes to
one of the center layers of the multi layer board.

Can anyone who has a schematic or PCB layout tell me the closest
component which this pad goes to. I would assume the center pin
of the POT goes to the audio amp input.

Thanks for any assistance.

Tedd, VE3TJD
Click to expand...

I doubt you'll find anyone with either, that sort of thing is not released
outside of the company that makes it.

Can you get to a stub of the trace to do a continuity check? Hold a probe on
that, then touch it to likely places such as pins on any op-amps, you should
be able to figure it out with some patience.
 
Garmin does not release any service information or sell spare parts to
outside servicers. Their units are serviced mainly by board swapping,
unless the fault is simple. To have your unit properly serviced, you
must send it to Garmin or one of their authorised service reps. They
may want to change the circuit board. This may be not feasible becasue
of the cost.

Jerry G.
======




On Nov 20, 9:26 am, ve3tjd <ve3...@gmail.com> wrote:
Hi Guys:

I'm trying to fix a Garmin 340 Street Pilot which my brother dropped.

The volume control was sheared off the board, but is still still
intact.
The problem I have is that the pad which connects to the center
terminal of the pot was torn off and it looks like the trace goes to
one of the center layers of the multi layer board.

Can anyone who has a schematic or PCB layout tell me the closest
component which this pad goes to. I would assume the center pin
of the POT goes to the audio amp input.

Thanks for any assistance.

Tedd, VE3TJD

Please reply to ve3tjd at RAC dot CA
Click to expand...
 
"ve3tjd" <ve3tjd@gmail.com> wrote in message
news:c9b28dee-54a4-44db-9e58-142d7c14fb41@d61g2000hsa.googlegroups.com...
Hi Guys:

I'm trying to fix a Garmin 340 Street Pilot which my brother dropped.

The volume control was sheared off the board, but is still still
intact.
The problem I have is that the pad which connects to the center
terminal of the pot was torn off and it looks like the trace goes to
one of the center layers of the multi layer board.

Can anyone who has a schematic or PCB layout tell me the closest
component which this pad goes to. I would assume the center pin
of the POT goes to the audio amp input.

Thanks for any assistance.

Tedd, VE3TJD
Click to expand...
Tedd

Garmin do not release any service info at all on their products, and usually
service by whole unit replacement with one that they have already repaired /
refurbed. You might try asking over on sci.geo.satellite-nav. There are some
very clued in and helpful guys on that group. It doesn't specifically deal
with repair issues, but I've had some helpful advice in this regard, in the
past

Arfa
 
James Sweet wrote:

I doubt you'll find anyone with either, that sort of thing is not released
outside of the company that makes it.
Click to expand...
That's what I was afraid of James, and others. I've been in the
electronic
repair industry for over 23 years, and it still baffles me why they
keep
such things so secret. The firmware is what makes these things what
they are, not the hardward. Brings back memories of the UPS guys
(APC) :(

Can you get to a stub of the trace to do a continuity check? Hold a probe on
that, then touch it to likely places such as pins on any op-amps, you should
be able to figure it out with some patience.
Click to expand...
I tried that, but the needed trace is beneath a ground plane which
covers the entire board (on the side of the torn pad). I could
probably
grind away the ground in every direction, but not for a $200 GPS.
There
is no VIA under the pad.

I'll see if I can borrow a unit from a friend and use his to trace
through the trace.

Thanks for the help guys, Tedd, VE3TJD
 
"Arfa Daily" <arfa.daily@ntlworld.com> wrote in
news:ZLL0j.9331$pg.7507@newsfe6-win.ntli.net...
in response of "ve3tjd" <ve3tjd@gmail.com> previous post
news:c9b28dee-54a4-44db-9e58-142d7c14fb41@d61g2000hsa.googlegroups.com...
Garmin do not release any service info at all on their products, and
usually
service by whole unit replacement with one that they have already repaired
/
refurbed.
Click to expand...
As soon as the device has be opened or modified bu the user, they will no
more propose to exchange it.

Four years ago, I get an exchange of my broken unit (after it falls) by
GARMIN Support U.K. for no more than having to paid for the express tracked
delivery service.
They simply send my a replacement unit (obvouislly a used one) in return of
my send. This unit is still perfectly working today.

If you plan to send any devise to GARMIN Support service, please don't
forget to get in touch with them and wait for the exchange coupon, so that
your equipment will not be lost (they receive units worldwide).

You might try asking over on sci.geo.satellite-nav. There are some
very clued in and helpful guys on that group. It doesn't specifically deal
with repair issues, but I've had some helpful advice in this regard, in
the
past
Click to expand...
Why not simply asking GARMIN, same ingenior may perhaps have the opportunity
to help you directly. He certainly can't send you any document, but same
time oral advise may be suffisant depending of your your skill in
electronics.

At least aonother suggestion :
Had the C340 unit an audion output socket (such as the C550 which have an
3.5 cinch outlet) ? You may perhaps track the audio circuit from this socket
?

Hope this will be of any use.

C.RET
 
clifto wrote:
Jerry G. wrote:
Garmin does not release any service information or sell spare parts to
outside servicers. Their units are serviced mainly by board swapping,
unless the fault is simple. To have your unit properly serviced, you
must send it to Garmin or one of their authorised service reps. They
may want to change the circuit board. This may be not feasible becasue
of the cost.

The last I checked, they have a one-price-for-all-repairs policy.
Click to expand...
If it is under warranty they give you a RMA number, you ship it to them,
they repair it (or replace it with a like model), and send it back.

I have had three repaired, it took two or three weeks each time and I
was fully satisfied. As it happened, I've never received the same unit
back, I've always gotten an as good as new replacement.

For out of warranty models, the prices vary. You can look them up here:

http://www8.garmin.com/support/outofwarranty.html

Jack
 
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