The MS200 Remote Control
Duncan Chisholm ([email protected])
After a few weeks of owning my new MS200 I was very tired of titling my
music using the little volume up/down buttons, and actually a little concerned
that these buttons might wear out with the heavy use I was making of them.
I figured that if the Sharp portables used a remote control scheme similar
to the Sony units (i.e. switching different resistances for each function)
and if the recorder had support for buttons on the remote control that
weren't present on my particular remote (especially ENTER and CHARACTER/TIME),
then it wouldn't be too difficult to build a computer titling system similar
to the infrared ones made for minidisk decks. After doing a little
investigating, I had to conclude that this wouldn't really be a practical
way of titling minidisks after all, mostly because Sharp portables don't
seem to have as many functions available (or potentially available) as
the Sony portables do. So, presented here is the information I collected
before giving up on the project. I hope someone can make use of it.
Although I don't think a computer titler would be
very useful, especially because of the lack of a remote ENTER button, I'm
considering building an enhanced remote control with a jog dial to make
manually titling minidisks a little less painful and time consuming.
If anyone has any suggestions for this, please let me know!
|
MS200 Remote Control Connections
|
|
Contact Number
|
Wire Colour
|
Plug Position
|
Function
|
|
1
|
White
|
Inside Ex. Ring
|
Switch Control
|
|
2
|
Black
|
Ring 1
|
GND
|
|
3
|
Yellow
|
Ring 2
|
Audio GND
|
|
4
|
Red
|
Ring 3
|
Right Channel
|
|
5
|
Green
|
Tip
|
Left Channel
|
|
6
|
(unused)
|
Outside Ex. Ring
|
LCD Display
|
|
The "Contact Number" used here is the number silk-screened
on the MS200's circuit board.
|
MS200 Remote Control Schematic (AD-MS20RM)
White ---/\/\/---/\/\/--/\/\/---/\/\/---/\/\/---/\/\/---/\/\/---/\/\/---/\/\/---
1.8K | 2.2K 2.7K | 3.3K | 3.9K | 4.7K | 6.8K | 10.0K | 180K |
| | | | | | | |
Play Stop Forward Back Vol.Up Vol.Dwn Bass |
| | | | | | | |
Black --------------------------------------------------------------------------
|
MS200 Remote Control Resistor Values
|
|
Function
|
Remote Resistance
|
Total Resistance
|
| Play |
1.8K
|
1.8K
|
| Stop |
4.9K
|
6.7K
|
| Forward |
3.3K
|
10K
|
| Back |
3.9K
|
13.9K
|
| Volume Up |
4.7K
|
18.6K
|
| Volume Down |
6.8K
|
25.4K
|
| Bass/Track Mark |
10K
|
35.4K
|
| Display* |
~15K
|
~50K
|
| Mode* |
~20K
|
~70K
|
| (More functions?) |
?
|
?
|
| None (standby) |
180K
|
215.4K+
|
*These functions aren't present on the standard
MS200 remote control; I managed to discover them with a little experimentation.
Remote Resistance is the resistor value found
in the remote control. Total Resistance is the resistance
as "seen" by the MS200. |
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