LMK1+ User's Guide Page 2
The difference between the MIDI Masterkeyboards LMK1 und LMK1+ is the type of keys. LMK1 uses
weighted plastic keys while LMK1+ has keys with real hammer mechanics. The control of LMK1 and
LMK1+ is identical. Both instruments are delivered with the combined LMK1/LMK1+ manual.
Technical specifications are subject to change without notice.
1. POWER SUPPLY
The LMK1 does not have a built-in power supply. Instead it uses a plug-in type external power supply
(AC adapter). One reason for this feature is electrical safety. Keeping danger voltages (main) out of
the keyboard increases the electrical safety. Therefore an external power supply of high quality
and safety should be used. If the keyboard is used in Germany the external power supply
must be VDE approved. Another reason for the external power supply is the fact that line voltages
and plug types vary considerably from country to country. Using a plug-in external supply the LMK1
can be used any where with a locally purchased power supply, thus keeping the retail price down.
The power supply must be able to deliver 7-12 VDC unstabilized voltage, as well as a minimum
current of 200mA. The LMK1 is switched ON by plugging the AC adapter into a wall outlet and
connecting it to the appropriate jack on the back of the keyboard case. There is no separate ON/OFF
switch. If the polarity of the power supply is incorrect, the LMK1 will not function. However, there is no
danger of damage to the circuitry since it is protected by a diode. A 230V power supply with European
type of plug is included with the LMK1. Other types of power supply must be purchased locally by the
user.
If you are using not the power supply enclosed with the LMK1 you may find the pinout of the LMK1
power jack in the appendix.
2. MIDI-INTERFACE
Connect the MIDI-OUT jack(s) of the LMK1 with MIDI-IN of the device(s) to be controlled (i.e.
Expander, Sequencer, Synthesizer, etc.) via a suitable MIDI-cable. Both MIDI-OUTs are
sending the same MIDI-signal. If you want to control more than 2 MIDI devices you have to use daisy
chain MIDI THRU/MIDI IN connection of the devices ore use a external MIDI THRU BOX.
3. CONNECTION OF EXTERNAL PEDAL AND FOOT CONTROLLER
Located on the rear of the keyboard case are 2 jacks for connecting a single or double foot switch and
a foot controller. The jack for the switches is labeled SUSTAIN, the jack for the foot controller
VOLUME. The two foot switches have SUSTAIN (MIDI controller #64) and SOSTENUTO
pedal function (MIDI controller #66). If a single foot switch is used only the SUSTAIN function is
available. A suitable double foot switch is the DOEPFER VFP2. If a foot controller is connected to the
VOLUME jack it has volume function (MIDI controller #7). A suitable foot controller is the DOEPFER
FP5.
If you are not using VFP2 or FP5 you may find the pinout of the SUSTAIN and VOLUME jacks in the
appendix as well as the type of potentiometer required for the foot controller.
Do not connect the footswitches or the foot controller unless the LMK1 is switched OFF. While power
on the LMK1 electronics checks the levels of the foot switches and assumes that these levels are the
"off" states. So do not operate the foot switches while turning power on. This feature allows the use of
foot switches with contacts open at rest as well as those closed at rest. The foot switches and the foot
controller are not included with the LMK1 and have to be ordered separately if required. The LMK1
will work without the foot switches and the foot controller, although the functions SUSTAIN,
SOSTENUTO and VOLUME will not be available to the user in that case.
4. CONTROLS
The only controls of LMK1 is a power control display (LED) and 2 wheels. The wheel without spring is
the
Modulation Wheel
(MIDI controller #1). The spring loaded wheel is the
Pitch Bend Wheel
(MIDI
pitch bend function). In addition LMK1 is equipped with a
monophonic After Touch
sensor below the
keys that is activated if you put pressure on the keys pressed down.
