stihl radio headphones

Adder1

recently I dropped my stihl radio head phones the ear pads came away (they are replaceable) and the lead from the recharge socket got disconnected and I am not sure which pins to connect it to. There are 5 pins which give a total of 3 connection positions as the plug has 3 pins please see attached photo I would appreciate it if any one could tell me the connection position either to the left tight to the red battery connection(looking down on battery) or center or to the right

redser7

I'd throw them into the compost bin meself.

Askim

Hi op
What is the other end connected too ?

Can you post more pics & maybe someone could figure it out, i.e. What is the other end of the 5 pins & what is the other end of the wire.
Can you see any dirt on 2 pins, it would usually mean nothing connected.

A

looksee

And then maybe post in one of the electronics forums!

Askim

I won't find it then, electronics is the day job, I'll be fecked if I am doing it on my time, that's for anoraks

The equipment is for gardening etc

A

Adder1

Askim wrote: »

Hi op
What is the other end connected too ?

Can you post more pics & maybe someone could figure it out, i.e. What is the other end of the 5 pins & what is the other end of the wire.
Can you see any dirt on 2 pins, it would usually mean nothing connected.

A

Thanks for your reply only just got in had a look at the pins 4 of them appear to have marks on them starting at the 3 pin in from the side the battery plug is connected to. the other end of the wire is soldered to the recharge socket
the pins are connected to the circuit board which has surface mount components there are no labels on the board to identify the components But the 3 pin from the left is connected to the negative plane on the back of the board also the 6th pin is like wise connected.both the blue and the black wire on the plug are shorted together when the recharge plug is connected to the socket and these are negative the red is positive
cannot seem to upload more pics it comes back service unavailable will try tomorrow
again thanks for your reply
almost forgot there is a component connected to the positive battery the number on this reads ft321 stg least think it is an f very hard to make out

Adder1

looksee wrote: »

And then maybe post in one of the electronics forums!

I thought that some one may have a set of these head phones And be able to check the plug position it is easy to remove the ear pads if you have a very fine flat head screw driver they just prise off and clip back (meant to be replaceable)

Nonmonotonic

What model is it? Its not this one because batteries are included (not rechargeable). Better photos would also be helpful.



If the three wire connector goes to a jack plug socket, it is probably wired as per left hand image.




One wire goes to ground and the battery connects to another terminal. When you plug in the charger, it physically breaks the battery connection to the radio and puts the charge voltage across the battery. I assume the battery connections are the + & -

example

Adder1

thanks for your reply nonmonotonic the connection that has came away is the plug connection to the circuit board the wires are still connected to the jack socket. please see photo 2012-09-03 23.48.16.jpg it shows jack and plug disconnected both black and blue wire are connected together in the jack socket dose not break connection between them when you insert jack plug. I dont remembet the model there is a sticker with EPS sn v2 02098-04-23 and also stihl fm/ukwstrereo radio is printed on the casing
these are the older models
I have included more pics sorry the quality is not great but my camera is gone faulty so i took them on the phone

and thanks again
ps I also contacted stihl but they told me I should bring them to local dealer and contact their tech department local stockist does not have a tech department

Nonmonotonic

I would have assumed that the black wire is the negative, the red is the positive and the blue is the switched ( by charger jack plug ) part.

You just need to find where the red and black wires go. Do this putting one probe of your meter on the black connector (-) of the battery and check for zero resistance on the 5 available pins ( you might get several ). Do the same with the red connector (+) on the battery ( in this case there should be only one pin @ zero resistance ). From this information you will know how to position the 3 pin connector.