True... stupid me. OK, a new diode it is and the same for both of the
others.
thanks,
/j.
WT skrev 2011-12-29 09:55:
> That diode doesn´t block the charging voltage. If it did, how would the
> original battery get charged ?
>
> WT
>
> ----- Original Message -----
> From: "jesper"<jesper@...>
> To:<Simmons_Drums@yahoogroups.com>
> Sent: Thursday, December 29, 2011 5:17 AM
> Subject: Re: [Simmons Drums] MTM and change of battery
>
>
>> OK, me again, with insomnia, hence the somewhat slow brain...
>>
>> I checked the schematics and noted that the two components on the + side
>> of the battery is in fact "just" the mentioned resistor (37) and the
>> diode (30) already in place.
>>
>> http://www.electronic-obsession.se/studio/simmons/mtm_battery_circuit.jpg
>>
>> So I cannot see any need for another diode. Please correct me if I'm
>> misinterpreting anything.
>>
>> /j.
>>
>>
>> jesper skrev 2011-12-29 05:00:
>>> Hi WT,
>>>
>>> so, basically just between the PCB solder point and the red wire in my
>>> photo? To block any voltage from reaching the battery? Any critical
>>> value or would any decent diode do?
>>>
>>> thanks,
>>> /j.
>>>
>>>
>>> WT skrev 2011-12-29 00:50:
>>>> I would just put a diode in series with the + side of the Lithium-cell.
>>>>
>>>> How you do it depends on where you put the Lithium-cell.
>>>>
>>>> WT
>>>>
>>>> ----- Original Message -----
>>>> From: "jesper"<jesper@...
>>>> <mailto:jesper%40electronic-obsession.se>>
>>>> To:<Simmons_Drums@yahoogroups.com<mailto:Simmons_Drums%40yahoogroups.com>>
>>>> Sent: Wednesday, December 28, 2011 10:57 AM
>>>> Subject: [Simmons Drums] MTM and change of battery
>>>>
>>>> > Hi list,
>>>> >
>>>> > I thought I should change the battery of my latest MTM today. But
>>>> since
>>>> > I was stupid enough not to make notes or take pictures when last
>>>> time
>>>> > doing this I dug out one of the other units to have a look.
>>>> >
>>>> > No. 114 had it's battery changed by the former owner and as far as
>>>> I
>>>> > remember I copied the work in my other MTM. Apart from the removal
>>>> of
>>>> > the old battery and the insertion of a AA-sized Lithium dito I can
>>>> only
>>>> > see one change: the lifting/removal of resistor 37. I did the same
>>>> on my
>>>> > other MTM and both works well, both functions and memory.
>>>> >
>>>> > Here's a shot of what can be seen inside no. 114.
>>>> >
>>>> http://www.electronic-obsession.se/studio/simmons/mtm_battery_mod.jpg
>>>> >
>>>> > So techs, let me know if this is wrong. Should I lift diode 30 too?
>>>> > Anything else? The schematics aren't the best and I'm no master at
>>>> > reading it anyway. :)
>>>> >
>>>> > Happy holidays,
>>>> > --
>>>> > electronically yours, jesper
>>>> >
>>>> > - -- --- ---- ----- ---- --- -- -
>>>> > www.electronic-obsession.se
>>>> >
>>>> >
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>>>> >
>>>> > Yahoo! Groups Links
>>>> >
>>>> >
>>>> >
>>>>
>>>>
>>>
>>>
>>
>>
>> --
>> electronically yours, jesper
>>
>> - -- --- ---- ----- ---- --- -- -
>> www.electronic-obsession.se
>>
>>
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>>
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>>
>>
>>
>
>
>
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--
electronically yours, jesper
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