Vintage Simmons Drums (UK) Users Group

I'm sure mine must need changing after 15 years. Whats the procedure? I'm thinking Maplins will have a replacement - would that be right? And if anyone has a part No or any other info I would be gratefull.

Thanks in advance.

Mark Frost skrev 2011-12-07 22:00:

> I'm sure mine must need changing after 15 years. Whats the procedure?
> I'm thinking Maplins will have a replacement - would that be right? And
> if anyone has a part No or any other info I would be gratefull.
>
> Thanks in advance.

I'd suggest a non-rechargeable long-life nicad battery. This to avoid
future leakage. Get a AA-type and a socket for it. Place it far off the
PCB and remove the recharging circuit (if I recall correct it's just one
component). I hope your battery hasn't leaked on the PCB yet. It can be
scary...
In times like these you realise you ought to take more shots of the
procedure while at it. :S

No part no to recommend since I bought my stuff here, among the polar bears.

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se

Basically, you need to take it apart to the extent that you can get the main PCB out. This means removing the case and jack panels so that you can un-nut the PCB and remove it. Install the new battery and reassemble.
Here's the battery I use:
http://www.radioshack.com/product/index.jsp?productId=2715655
Good luck, Mark!

--- In Simmons_Drums@yahoogroups.com, "Mark Frost" <airflamesred@...> wrote:
>
> I'm sure mine must need changing after 15 years. Whats the procedure? I'm thinking Maplins will have a replacement - would that be right? And if anyone has a part No or any other info I would be gratefull.
>
> Thanks in advance.
>

My solution is to replace the old Nicad battery with a standard Lithium cell
CR-2032.

You will need to install one 1N4148 diode in series with the + side of the
CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!

WT

----- Original Message -----
From: "jesper" <jesper@...>
To: <Simmons_Drums@yahoogroups.com>
Sent: Wednesday, December 07, 2011 10:29 PM
Subject: Re: [Simmons Drums] MTM battery


> Mark Frost skrev 2011-12-07 22:00:
>> I'm sure mine must need changing after 15 years. Whats the procedure?
>> I'm thinking Maplins will have a replacement - would that be right? And
>> if anyone has a part No or any other info I would be gratefull.
>>
>> Thanks in advance.
>
> I'd suggest a non-rechargeable long-life nicad battery. This to avoid
> future leakage. Get a AA-type and a socket for it. Place it far off the
> PCB and remove the recharging circuit (if I recall correct it's just one
> component). I hope your battery hasn't leaked on the PCB yet. It can be
> scary...
> In times like these you realise you ought to take more shots of the
> procedure while at it. :S
>
> No part no to recommend since I bought my stuff here, among the polar
> bears.
>
> --
> electronically yours, jesper
>
> - -- --- ---- ----- ---- --- -- -
> www.electronic-obsession.se
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

My word you guys are quick!
Plenty of options so I'll keep you posted. Is there anything we can do with the display - backlighting? It's all working but just, well, dim at best.

--- In Simmons_Drums@yahoogroups.com, "WT" <waveterm@...> wrote:
>
> My solution is to replace the old Nicad battery with a standard Lithium cell
> CR-2032.
>
> You will need to install one 1N4148 diode in series with the + side of the
> CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!
>
> WT
>
> ----- Original Message -----
> From: "jesper" <jesper@...>
> To: <Simmons_Drums@yahoogroups.com>
> Sent: Wednesday, December 07, 2011 10:29 PM
> Subject: Re: [Simmons Drums] MTM battery
>
>
> > Mark Frost skrev 2011-12-07 22:00:
> >> I'm sure mine must need changing after 15 years. Whats the procedure?
> >> I'm thinking Maplins will have a replacement - would that be right? And
> >> if anyone has a part No or any other info I would be gratefull.
> >>
> >> Thanks in advance.
> >
> > I'd suggest a non-rechargeable long-life nicad battery. This to avoid
> > future leakage. Get a AA-type and a socket for it. Place it far off the
> > PCB and remove the recharging circuit (if I recall correct it's just one
> > component). I hope your battery hasn't leaked on the PCB yet. It can be
> > scary...
> > In times like these you realise you ought to take more shots of the
> > procedure while at it. :S
> >
> > No part no to recommend since I bought my stuff here, among the polar
> > bears.
> >
> > --
> > electronically yours, jesper
> >
> > - -- --- ---- ----- ---- --- -- -
> > www.electronic-obsession.se
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

WT skrev 2011-12-07 22:35:

> My solution is to replace the old Nicad battery with a standard Lithium
> cell
> CR-2032.
>
> You will need to install one 1N4148 diode in series with the + side of the
> CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!

That's what I meant. Lithium, not nicad. Thanks for clearing that out WT!

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se

Backlight? I have two MTMs and neither screen lights up. It's been
difficult to read them and I always thought a backlight would've been nice but not
available or too expensive in 1985.


In a message dated 12/7/2011 5:41:27 P.M. Eastern Standard Time,
airflamesred@... writes:




My word you guys are quick!
Plenty of options so I'll keep you posted. Is there anything we can do
with the display - backlighting? It's all working but just, well, dim at best.

--- In _Simmons_Drums@yahoogroups.com_
(mailto:Simmons_Drums@yahoogroups.com) , "WT" <waveterm@...> wrote:

>
> My solution is to replace the old Nicad battery with a standard Lithium

cell

> CR-2032.
>
> You will need to install one 1N4148 diode in series with the + side of

the

> CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!
>
> WT
>
> ----- Original Message -----
> From: "jesper" <jesper@...>
> To: <_Simmons_Drums@yahoogroups.com_

(mailto:Simmons_Drums@yahoogroups.com) >

> Sent: Wednesday, December 07, 2011 10:29 PM
> Subject: Re: [Simmons Drums] MTM battery
>
>
> > Mark Frost skrev 2011-12-07 22:00:
> >> I'm sure mine must need changing after 15 years. Whats the procedure?
> >> I'm thinking Maplins will have a replacement - would that be right?

And

> >> if anyone has a part No or any other info I would be gratefull.
> >>
> >> Thanks in advance.
> >
> > I'd suggest a non-rechargeable long-life nicad battery. This to avoid
> > future leakage. Get a AA-type and a socket for it. Place it far off the
> > PCB and remove the recharging circuit (if I recall correct it's just

one

> > component). I hope your battery hasn't leaked on the PCB yet. It can be
> > scary...
> > In times like these you realise you ought to take more shots of the
> > procedure while at it. :S
> >
> > No part no to recommend since I bought my stuff here, among the polar
> > bears.
> >
> > --
> > electronically yours, jesper
> >
> > - -- --- ---- ----- ---- --- -- -
> > www.electronic-obsession.se
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

[Non-text portions of this message have been removed]

Oh, is there a backlight ?

Never thought about that. My MTM´s has always been dark.

WT

----- Original Message -----
From: "Mark Frost" <airflamesred@...>
To: <Simmons_Drums@yahoogroups.com>
Sent: Wednesday, December 07, 2011 11:07 PM
Subject: Re: [Simmons Drums] MTM battery


> My word you guys are quick!
> Plenty of options so I'll keep you posted. Is there anything we can do
> with the display - backlighting? It's all working but just, well, dim at
> best.
>
> --- In Simmons_Drums@yahoogroups.com, "WT" <waveterm@...> wrote:
>>
>> My solution is to replace the old Nicad battery with a standard Lithium
>> cell
>> CR-2032.
>>
>> You will need to install one 1N4148 diode in series with the + side of
>> the
>> CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!
>>
>> WT
>>
>> ----- Original Message -----
>> From: "jesper" <jesper@...>
>> To: <Simmons_Drums@yahoogroups.com>
>> Sent: Wednesday, December 07, 2011 10:29 PM
>> Subject: Re: [Simmons Drums] MTM battery
>>
>>
>> > Mark Frost skrev 2011-12-07 22:00:
>> >> I'm sure mine must need changing after 15 years. Whats the procedure?
>> >> I'm thinking Maplins will have a replacement - would that be right?
>> >> And
>> >> if anyone has a part No or any other info I would be gratefull.
>> >>
>> >> Thanks in advance.
>> >
>> > I'd suggest a non-rechargeable long-life nicad battery. This to avoid
>> > future leakage. Get a AA-type and a socket for it. Place it far off the
>> > PCB and remove the recharging circuit (if I recall correct it's just
>> > one
>> > component). I hope your battery hasn't leaked on the PCB yet. It can be
>> > scary...
>> > In times like these you realise you ought to take more shots of the
>> > procedure while at it. :S
>> >
>> > No part no to recommend since I bought my stuff here, among the polar
>> > bears.
>> >
>> > --
>> > electronically yours, jesper
>> >
>> > - -- --- ---- ----- ---- --- -- -
>> > www.electronic-obsession.se
>> >
>> >
>> > ------------------------------------
>> >
>> > Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Now that you mention, perhaps it would be an easy retrofit. Any tips
before I tear mine open?


In a message dated 12/7/2011 5:46:59 P.M. Eastern Standard Time,
waveterm@... writes:




Oh, is there a backlight ?

Never thought about that. My MTM´s has always been dark.

WT

----- Original Message -----
From: "Mark Frost" <_airflamesred@..._
(mailto:airflamesred@...) >
To: <_Simmons_Drums@yahoogroups.com_
(mailto:Simmons_Drums@yahoogroups.com) >
Sent: Wednesday, December 07, 2011 11:07 PM
Subject: Re: [Simmons Drums] MTM battery

> My word you guys are quick!
> Plenty of options so I'll keep you posted. Is there anything we can do
> with the display - backlighting? It's all working but just, well, dim at
> best.
>
> --- In _Simmons_Drums@yahoogroups.com_
(mailto:Simmons_Drums@yahoogroups.com) , "WT" <waveterm@...> wrote:
>>
>> My solution is to replace the old Nicad battery with a standard Lithium
>> cell
>> CR-2032.
>>
>> You will need to install one 1N4148 diode in series with the + side of
>> the
>> CR2032 to stop the charging voltage otherwise the CR2032 might
explode!!!
>>
>> WT
>>
>> ----- Original Message -----
>> From: "jesper" <jesper@...>
>> To: <_Simmons_Drums@yahoogroups.com_
(mailto:Simmons_Drums@yahoogroups.com) >
>> Sent: Wednesday, December 07, 2011 10:29 PM
>> Subject: Re: [Simmons Drums] MTM battery
>>
>>
>> > Mark Frost skrev 2011-12-07 22:00:
>> >> I'm sure mine must need changing after 15 years. Whats the procedure?
>> >> I'm thinking Maplins will have a replacement - would that be right?
>> >> And
>> >> if anyone has a part No or any other info I would be gratefull.
>> >>
>> >> Thanks in advance.
>> >
>> > I'd suggest a non-rechargeable long-life nicad battery. This to avoid
>> > future leakage. Get a AA-type and a socket for it. Place it far off
the
>> > PCB and remove the recharging circuit (if I recall correct it's just
>> > one
>> > component). I hope your battery hasn't leaked on the PCB yet. It can
be
>> > scary...
>> > In times like these you realise you ought to take more shots of the
>> > procedure while at it. :S
>> >
>> > No part no to recommend since I bought my stuff here, among the polar
>> > bears.
>> >
>> > --
>> > electronically yours, jesper
>> >
>> > - -- --- ---- ----- ---- --- -- -
>> > www.electronic-obsession.se
>> >
>> >
>> > ------------------------------------
>> >
>> > Yahoo! Groups Links
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>






[Non-text portions of this message have been removed]

Mark Frost skrev 2011-12-07 23:07:

> My word you guys are quick!
> Plenty of options so I'll keep you posted. Is there anything we can do
> with the display - backlighting? It's all working but just, well, dim at
> best.

I guess you could echange or modify it, but I doubt it's worth it. I
program my units in the light of a lamp and when happy leave it at that.
But they are permanently hooked up to SDS-V and SDS-7 so I don't fiddle
around much anyway...

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se

Retrofitting a backlit lcd is a really easy swap...

I used this display:
http://www.kjell.com/sortiment/el/elektronik/optokomponenter/lcd-displayer/lcd-display-p90215
(In Swedish, sorry...)

The only difference is that it requires positive voltage for the lcd contrast instead of the original display that uses negative voltage... Otherwise, looks awsome and is way more easy to read in the dark :-)

// Lars

--- In Simmons_Drums@yahoogroups.com, sovereigng@... wrote:
>
>
> Now that you mention, perhaps it would be an easy retrofit. Any tips
> before I tear mine open?
>
>
> In a message dated 12/7/2011 5:46:59 P.M. Eastern Standard Time,
> waveterm@... writes:
>
>
>
>
> Oh, is there a backlight ?
>
> Never thought about that. My MTM´s has always been dark.
>
> WT
>
> ----- Original Message -----
> From: "Mark Frost" <_airflamesred@..._
> (mailto:airflamesred@...) >
> To: <_Simmons_Drums@yahoogroups.com_
> (mailto:Simmons_Drums@yahoogroups.com) >
> Sent: Wednesday, December 07, 2011 11:07 PM
> Subject: Re: [Simmons Drums] MTM battery
>
> > My word you guys are quick!
> > Plenty of options so I'll keep you posted. Is there anything we can do
> > with the display - backlighting? It's all working but just, well, dim at
> > best.
> >
> > --- In _Simmons_Drums@yahoogroups.com_
> (mailto:Simmons_Drums@yahoogroups.com) , "WT" <waveterm@> wrote:
> >>
> >> My solution is to replace the old Nicad battery with a standard Lithium
> >> cell
> >> CR-2032.
> >>
> >> You will need to install one 1N4148 diode in series with the + side of
> >> the
> >> CR2032 to stop the charging voltage otherwise the CR2032 might
> explode!!!
> >>
> >> WT
> >>
> >> ----- Original Message -----
> >> From: "jesper" <jesper@>
> >> To: <_Simmons_Drums@yahoogroups.com_
> (mailto:Simmons_Drums@yahoogroups.com) >
> >> Sent: Wednesday, December 07, 2011 10:29 PM
> >> Subject: Re: [Simmons Drums] MTM battery
> >>
> >>
> >> > Mark Frost skrev 2011-12-07 22:00:
> >> >> I'm sure mine must need changing after 15 years. Whats the procedure?
> >> >> I'm thinking Maplins will have a replacement - would that be right?
> >> >> And
> >> >> if anyone has a part No or any other info I would be gratefull.
> >> >>
> >> >> Thanks in advance.
> >> >
> >> > I'd suggest a non-rechargeable long-life nicad battery. This to avoid
> >> > future leakage. Get a AA-type and a socket for it. Place it far off
> the
> >> > PCB and remove the recharging circuit (if I recall correct it's just
> >> > one
> >> > component). I hope your battery hasn't leaked on the PCB yet. It can
> be
> >> > scary...
> >> > In times like these you realise you ought to take more shots of the
> >> > procedure while at it. :S
> >> >
> >> > No part no to recommend since I bought my stuff here, among the polar
> >> > bears.
> >> >
> >> > --
> >> > electronically yours, jesper
> >> >
> >> > - -- --- ---- ----- ---- --- -- -
> >> > www.electronic-obsession.se
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > Yahoo! Groups Links
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

Aah very cool.

Might have to look into that one day.

WT

----- Original Message -----
From: "xylofoam" <lars.frisk@...>
To: <Simmons_Drums@yahoogroups.com>
Sent: Wednesday, December 07, 2011 11:57 PM
Subject: Re: [Simmons Drums] MTM battery


Retrofitting a backlit lcd is a really easy swap...

I used this display:
http://www.kjell.com/sortiment/el/elektronik/optokomponenter/lcd-displayer/lcd-display-p90215
(In Swedish, sorry...)

The only difference is that it requires positive voltage for the lcd
contrast instead of the original display that uses negative voltage...
Otherwise, looks awsome and is way more easy to read in the dark :-)

// Lars

--- In Simmons_Drums@yahoogroups.com, sovereigng@... wrote:
>
>
> Now that you mention, perhaps it would be an easy retrofit. Any tips
> before I tear mine open?
>
>
> In a message dated 12/7/2011 5:46:59 P.M. Eastern Standard Time,
> waveterm@... writes:
>
>
>
>
> Oh, is there a backlight ?
>
> Never thought about that. My MTM´s has always been dark.
>
> WT
>
> ----- Original Message -----
> From: "Mark Frost" <_airflamesred@..._
> (mailto:airflamesred@...) >
> To: <_Simmons_Drums@yahoogroups.com_
> (mailto:Simmons_Drums@yahoogroups.com) >
> Sent: Wednesday, December 07, 2011 11:07 PM
> Subject: Re: [Simmons Drums] MTM battery
>
> > My word you guys are quick!
> > Plenty of options so I'll keep you posted. Is there anything we can do
> > with the display - backlighting? It's all working but just, well, dim
> > at
> > best.
> >
> > --- In _Simmons_Drums@yahoogroups.com_
> (mailto:Simmons_Drums@yahoogroups.com) , "WT" <waveterm@> wrote:
> >>
> >> My solution is to replace the old Nicad battery with a standard
> >> Lithium
> >> cell
> >> CR-2032.
> >>
> >> You will need to install one 1N4148 diode in series with the + side of
> >> the
> >> CR2032 to stop the charging voltage otherwise the CR2032 might
> explode!!!
> >>
> >> WT
> >>
> >> ----- Original Message -----
> >> From: "jesper" <jesper@>
> >> To: <_Simmons_Drums@yahoogroups.com_
> (mailto:Simmons_Drums@yahoogroups.com) >
> >> Sent: Wednesday, December 07, 2011 10:29 PM
> >> Subject: Re: [Simmons Drums] MTM battery
> >>
> >>
> >> > Mark Frost skrev 2011-12-07 22:00:
> >> >> I'm sure mine must need changing after 15 years. Whats the
> >> >> procedure?
> >> >> I'm thinking Maplins will have a replacement - would that be right?
> >> >> And
> >> >> if anyone has a part No or any other info I would be gratefull.
> >> >>
> >> >> Thanks in advance.
> >> >
> >> > I'd suggest a non-rechargeable long-life nicad battery. This to
> >> > avoid
> >> > future leakage. Get a AA-type and a socket for it. Place it far off
> the
> >> > PCB and remove the recharging circuit (if I recall correct it's just
> >> > one
> >> > component). I hope your battery hasn't leaked on the PCB yet. It can
> be
> >> > scary...
> >> > In times like these you realise you ought to take more shots of the
> >> > procedure while at it. :S
> >> >
> >> > No part no to recommend since I bought my stuff here, among the
> >> > polar
> >> > bears.
> >> >
> >> > --
> >> > electronically yours, jesper
> >> >
> >> > - -- --- ---- ----- ---- --- -- -
> >> > www.electronic-obsession.se
> >> >
> >> >
> >> > ------------------------------------
> >> >
> >> > Yahoo! Groups Links
> >> >
> >> >
> >> >
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>




------------------------------------

Yahoo! Groups Links

--- In Simmons_Drums@yahoogroups.com, "WT" <waveterm@...> wrote:

>
> My solution is to replace the old Nicad battery with a standard Lithium cell
> CR-2032.
>
> You will need to install one 1N4148 diode in series with the + side of the
> CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!
>
> WT

Why not just replace the NiCad with a NiMH? It's a drop-in replacement and you won't have to worry about it for another 20 years...

__
Gordon JC Pearce MM0YEQ

Well that sounds like my kind of solution Gordon. There are signs of leakage from the battery but its not serious. I have so far lifted off the cover cap, but I can't seem to see how to get the battery out. It is shrouded in a plastic tube. Any help would be apreciated.
On the backlit display issue I think I have found http://www.maplin.co.uk/supertwist-alphanumeric-lcd-modules-36389
something that seems to fit the bill. Will I need to cut the ribbon cable and re-solder?
thanks in advance.

--- In Simmons_Drums@yahoogroups.com, "gordonjcp" <gordon@...> wrote:
>
>
>
> --- In Simmons_Drums@yahoogroups.com, "WT" <waveterm@> wrote:
> >
> > My solution is to replace the old Nicad battery with a standard Lithium cell
> > CR-2032.
> >
> > You will need to install one 1N4148 diode in series with the + side of the
> > CR2032 to stop the charging voltage otherwise the CR2032 might explode!!!
> >
> > WT
>
> Why not just replace the NiCad with a NiMH? It's a drop-in replacement and you won't have to worry about it for another 20 years...
>
> __
> Gordon JC Pearce MM0YEQ
>

Leakage is always serious since it won't stop tearing at the PCB. The
acids are still there you know... Clean it - a lot!
You need to desolder the entire battery pack. Don't cut the plastic tube.

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se


Mark Frost skrev 2011-12-08 20:44:

> Well that sounds like my kind of solution Gordon. There are signs of
> leakage from the battery but its not serious. I have so far lifted off
> the cover cap, but I can't seem to see how to get the battery out. It is
> shrouded in a plastic tube. Any help would be apreciated.
> On the backlit display issue I think I have found
> http://www.maplin.co.uk/supertwist-alphanumeric-lcd-modules-36389
> something that seems to fit the bill. Will I need to cut the ribbon
> cable and re-solder?
> thanks in advance.

Well the thing is/was that there was nothing to de solder so this has all gone wrong. I'm gonna have to remove the board to get at things I guess.

--- In Simmons_Drums@yahoogroups.com, jesper <jesper@...> wrote:
>
> Leakage is always serious since it won't stop tearing at the PCB. The
> acids are still there you know... Clean it - a lot!
> You need to desolder the entire battery pack. Don't cut the plastic tube.
>
> --
> electronically yours, jesper
>
> - -- --- ---- ----- ---- --- -- -
> www.electronic-obsession.se
>
>
> Mark Frost skrev 2011-12-08 20:44:
> > Well that sounds like my kind of solution Gordon. There are signs of
> > leakage from the battery but its not serious. I have so far lifted off
> > the cover cap, but I can't seem to see how to get the battery out. It is
> > shrouded in a plastic tube. Any help would be apreciated.
> > On the backlit display issue I think I have found
> > http://www.maplin.co.uk/supertwist-alphanumeric-lcd-modules-36389
> > something that seems to fit the bill. Will I need to cut the ribbon
> > cable and re-solder?
> > thanks in advance.
>

the battery for the mtm has to be rechargeable,i went to radio shack or the source and bought a four AA battery holder and three AA nihi ,1.2 volts rechargeable batteries,then resolder the holder so it works for three batteries just move the wire over to battery three as you wont need the fourth (1.2 x 3=3.6volts),this way it is easy to replace them and if it leaks the container will hold it hopefully,so then i took the plastic cap off and used a razor blade and small screwdriver to pry off the welded tabs and soldered a wire from the positive of circuit board to positive of battery pack,then the negative to negative,and it works. if you pry the battery off and tabs break,then pull circuit board off and solder directly to the the circuit board path.once i rebuit the circuit path eaten by the acid leak using real tin foil duct tape ,i used and ohm meter to trace out every path and resoldered every joint because as soon as the it got cold the bars would show up instead of the startup display,which i think happens when the battery shorts out and poor soldering joints,its been along battle,but the battry advice came from Michael a support from the drum museum,Simmons repair expert

Yes, you need to completely remove the motherboard to be able to desolder
the battery.

WT

----- Original Message -----
From: "Mark Frost" <airflamesred@...>
To: <Simmons_Drums@yahoogroups.com>
Sent: Friday, December 09, 2011 5:35 PM
Subject: Re: [Simmons Drums] MTM battery


> Well the thing is/was that there was nothing to de solder so this has all
> gone wrong. I'm gonna have to remove the board to get at things I guess.
>
> --- In Simmons_Drums@yahoogroups.com, jesper <jesper@...> wrote:
>>
>> Leakage is always serious since it won't stop tearing at the PCB. The
>> acids are still there you know... Clean it - a lot!
>> You need to desolder the entire battery pack. Don't cut the plastic tube.
>>
>> --
>> electronically yours, jesper
>>
>> - -- --- ---- ----- ---- --- -- -
>> www.electronic-obsession.se
>>
>>
>> Mark Frost skrev 2011-12-08 20:44:
>> > Well that sounds like my kind of solution Gordon. There are signs of
>> > leakage from the battery but its not serious. I have so far lifted off
>> > the cover cap, but I can't seem to see how to get the battery out. It
>> > is
>> > shrouded in a plastic tube. Any help would be apreciated.
>> > On the backlit display issue I think I have found
>> > http://www.maplin.co.uk/supertwist-alphanumeric-lcd-modules-36389
>> > something that seems to fit the bill. Will I need to cut the ribbon
>> > cable and re-solder?
>> > thanks in advance.
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Mark Frost skrev 2011-12-09 17:35:

> Well the thing is/was that there was nothing to de solder so this has
> all gone wrong. I'm gonna have to remove the board to get at things I guess.

If the entire mounting is wrecked by the battery acid you should really
clean it. THere might even be rewiring to be done. :(

My third MTM arrived today. Version 4 of the OS and a serial in the
700's. Remains to be seen if it works since the Ebayer who sold it said
it was "as seen". The battery is old but not leaking (yet) and it does
accept commands, stores changes and have all the knobs. Cannot be all
bad then. :)

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se

Brian Horton skrev 2011-12-10 04:10:

>
> the battery for the mtm has to be rechargeable---

It doesn't _have to_. If you change to a long-life non-rechargable you
have to alter the circuitry though. I prefer this operation plus moving
the battery far from the PCB.

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se

Great News.
MTM No 809 is out of Hospital and working well. Brian, your explplanation was great so many thanks. Got it back together without too many problems and had to reset every single parameter (obviously).
One point to note for anyone else attemping this is the ribbon cable from the front panel. The first pin isn't used - I hadn't noticed when taking it off.
Anyway, bouiyed by my success I may well look into the display change soon.

--- In Simmons_Drums@yahoogroups.com, "Brian Horton" <brianhorton21@...> wrote:
>
>
> the battery for the mtm has to be rechargeable,i went to radio shack or the source and bought a four AA battery holder and three AA nihi ,1.2 volts rechargeable batteries,then resolder the holder so it works for three batteries just move the wire over to battery three as you wont need the fourth (1.2 x 3=3.6volts),this way it is easy to replace them and if it leaks the container will hold it hopefully,so then i took the plastic cap off and used a razor blade and small screwdriver to pry off the welded tabs and soldered a wire from the positive of circuit board to positive of battery pack,then the negative to negative,and it works. if you pry the battery off and tabs break,then pull circuit board off and solder directly to the the circuit board path.once i rebuit the circuit path eaten by the acid leak using real tin foil duct tape ,i used and ohm meter to trace out every path and resoldered every joint because as soon as the it got cold the bars would show up instead of the startup display,which i think happens when the battery shorts out and poor soldering joints,its been along battle,but the battry advice came from Michael a support from the drum museum,Simmons repair expert
>

Congrat's! :)

If you went for the rechargable type. Remember to check it in another
15-20 years.

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se


Mark Frost skrev 2011-12-12 22:32:

> Great News.
> MTM No 809 is out of Hospital and working well. Brian, your
> explplanation was great so many thanks. Got it back together without too
> many problems and had to reset every single parameter (obviously).
> One point to note for anyone else attemping this is the ribbon cable
> from the front panel. The first pin isn't used - I hadn't noticed when
> taking it off.
> Anyway, bouiyed by my success I may well look into the display change soon.
>
> --- In Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>, "Brian Horton"
> <brianhorton21@...> wrote:
> >
> >
> > the battery for the mtm has to be rechargeable,i went to radio shack
> or the source and bought a four AA battery holder and three AA nihi ,1.2
> volts rechargeable batteries,then resolder the holder so it works for
> three batteries just move the wire over to battery three as you wont
> need the fourth (1.2 x 3=3.6volts),this way it is easy to replace them
> and if it leaks the container will hold it hopefully,so then i took the
> plastic cap off and used a razor blade and small screwdriver to pry off
> the welded tabs and soldered a wire from the positive of circuit board
> to positive of battery pack,then the negative to negative,and it works.
> if you pry the battery off and tabs break,then pull circuit board off
> and solder directly to the the circuit board path.once i rebuit the
> circuit path eaten by the acid leak using real tin foil duct tape ,i
> used and ohm meter to trace out every path and resoldered every joint
> because as soon as the it got cold the bars would show up instead of the
> startup display,which i think happens when the battery shorts out and
> poor soldering joints,its been along battle,but the battry advice came
> from Michael a support from the drum museum,Simmons repair expert
> >