DOEPFER | LMK2+ | User`s guide | DOEPFER LMK2+ User`s guide

DOEPFER
MIDI Keyboard
PK88
User's Guide
Contents
1. Introduction
2. Operating and Security
Instructions
3. Power Supply
4. MIDI Connectors
5. Connection of the Foot Switch
Appendix A:
Modifications
A-1: Foot switch type
A-2: MIDI Channel
Appendix B:
Pin Assignment of the Jack
Sockets
1. Introduction
PK88 is a MIDI master keyboard designed especially for the requirements of the "mobile pianist" who needs
a high class and easy to carry keyboard but is able to dispense with extended MIDI features. PK88 includes
no sound generation as is was made to combine it with a piano expander offered by some manufaturers
(e.g. Kurzweil, Emu, Yamaha, Roland, Akai). The PK88 uses a 88 keys keyboard with real hammer
mechanics. The case used is a rugged and easy to carry black flightcase with handle and removable lid.
The dimensions are about 135 x 27 x 11 cm, the weight is about 20 kg.
The MIDI features are limited to what the user of such a keyboard really needs: PK88 transmits MIDI note
events in the MIDI note range 21-108 with velocity on MIDI channel 1. The velocity resolution is 127 steps.
We set a high value on the conversion of the mechanical impact to the MIDI velocity so that it is as close as
possible to the bevaviour of a real piano - within the limited possibilities of MIDI. At the rear panel a double
foot switch can be connected to obtain the piano features sustain (MIDI controller #64) and soft pedal (MIDI
controller #67). If you need more MIDI functions - like pitch-bend, modulation, after touch, program change,
start/stop/continue, keyboard-zones or others - we recommend one of our large-scale master keybords
(e.g. LMK2+ or LMK4+). The PK88 is also available as bundle together with the Kurzweil Micro Piano.
2. Operating and Security Instructions
Please follow the given instructions for use of the instrument because this will guarantee correct instrument
operation. Due to the fact that these instructions touch on Product Liability, it is absolutely imperative that
they be read carefully. Any claim for defect will be rejected if one or more of the items was observed.
Disregard of the instructions can endanger the 6 month warranty.
• The instrument may only be used for the purpose described in this operating manual. Due to safety
reasons, the instrument must never be used for other purposes not described in this manual. If you are
not sure about the intended purpose of the instrument please contact an expert.
• The case (flight case) is not a packing suitable for shipment but the case of the instrument. If you want to
ship the instrument via mail, UPS, rail, forwarding agency or others you always must use the original
packaging. Therefore, you should keep the original packaging.
• Transport the instrument carefully, never let it fall or overturn. Make sure that during transport and in use
the instrument has a proper stand and does not fall, slip or turn over because persons could be injured.
• The instrument or the external power supply may only be operated with the voltage written on the
instrument power supply input on the rear panel or on the external power supply.
• Before opening the instrument or the external power the instrument or external power supply must be
disconnected from mains power supply.
• All eventual modifications must only be carried out by a qualified person who will follow the valid safety
instructions. Every modification should becarried out only at the manufacturer or an authorized service
company. Any modification not released by the manufacturer leads to the extinction of the operation
permission.
• With the introduction of a third person the warranty will be lost. In case of a destroyed warranty seal, any
warranty claim will be rejected.
• The instrument must never be operated outdoors but in dry, closed rooms. Never use the instrument in a
humid or wet environment nor near inflammables.
• No liquids or conducting materials must get into the instrument. If this should happen the instrument must
be disconnected from power immediately and be examined, cleaned and eventually be repaired by a
qualified person.
• Never subject the instrument to temperatures above +50°C or below -10°C. Before operation the
instrument should have a temperature of at least 10°C. Do not place the instrument into direct sun light.
Do not install the instrument near heat sources.
• Keep the top side of the instrument free in order to guarantee proper ventilation, otherwise the instrument
could be overheated.
• All cables connected with the instrument must be checked periodically. If there is any damage the cables
must be repaired or replaced by an authorized person.
• Never place heavy objects on the instrument.
PK88 User's Guide V2 - Page 2
• Never use the instrument in the immediate proximity of interfering electronic devices (e.g. monitors,
power supplies, computers) since this could create disturbances within the instrument.
• The exchange of electronic parts (e.g. EPROMs for software update) is allowed only if the instrument is
disconnected from power supply.
• The instrument should only be shipped in the original packaging. Any instruments shipped to us for return,
exchange, warranty repair, update or examination must be in their original packaging! Any other deliveries
will be rejected. Therefore, you should keep the original packaging and the technical documentation.
• When using the instrument in Germany, the appropriate VDE standards must be followed. The following
standards are of special importance: DIN VDE 0100 (Teil 300/11.85, Teil 410/11.83, Teil 481/10.87), DIN
VDE 0532 (Teil 1/03.82), DIN VDE 0550 (Teil 1/12.69), DIN VDE 0551 (05.72), DIN VDE 0551e (06.75),
DIN VDE 0700 (Teil 1/02.81, Teil 207/10.82), DIN VDE 0711 (Teil 500/10.89), DIN VDE 0860 (05.89), DIN
VDE 0869 (01.85). VDE papers can be obtained from the VDE-Verlag GmbH, Berlin.
3. Power Supply
The PK88 does not have a built-in power supply. Instead it uses a plug-in type external power supply (DC
adapter). The connector is labeled „9V DC„ and is located next to the two MIDI sockets. The primary reason
for this feature is the fact that line voltages and plug types vary considerably from country to country. Using a
plug-in external supply the PK88 can be used anywhere with a locally purchased power supply, thus keeping
the retail price down.The PK88 is switched ON by plugging the AC adapter into a wall outlet and connecting
it to the appropriate jack on the back of the case. There is no separate ON/OFF switch. PK88 sold in
Germany do include an AC adapter for 230V mains supply.
In other countries the power supply is NOT included with the PK88 and must be purchased locally by the
user. The power supply must be able to deliver a voltage of 7-12 VDC (unstabilized), as well as a minimum
current of 100mA.
4. MIDI Connectors
Next to the power supply connector you will find the two MIDI connectors labelled "MIDI-Out". On both
connectors the same MIDI data are available. Connect one of both outputs with MIDI-IN of the device to be
controlled (Expander, Synthesizer, Sampler) via a suitable MIDI-cable. If you want to control a second device
with the same MIDI data you may use the second MIDI output or you link the devices via MIDI THRU/MIDI IN.
5. Connection of the Foot Switch
Located on the rear of the keyboard case is a jack for connecting a single or double foot switch. Do not
connect the footswitch unless the PK88 is switched OFF. The two foot switches have SUSTAIN (MIDI
controller #64) and SOFT PEDAL function (MIDI controller #67). If a single foot switch is used only the
SUSTAIN function is available. A suitable double foot switch is e.g. the DOEPFER VFP2.
There are two types of foot switches available: "contacts open at rest" or "contacts closed at rest". The
factory setting of the PK88 is for "closed at rest" (suitable for our VFP2). If you want to use a single or double
foot switch "open at rest" you have to modify the setting for the foot switch type (see appendix:
modifications).
Please pay attention that some MIDI expanders do not support the MIDI controller #67 (Soft pedal). Sustain
(#64) is recognized by nearly all expanders. Please refer to the user's guide of the expander used if both
controllers are supported.
The double foot switch is not included with the PK88 and has to be ordered separately if required. The PK88
will work without the double foot switch, although the functions SUSTAIN and SOFT PEDAL will not be
available to the user in that case.
PK88 User's Guide V2 - Page 3
Appendix A: Modifications
These remarks are only for authorized service personal. If you open the device (removing the keyboard or
the rear panel) the warranty will be lost. In case of a destroyed warranty seal, any warranty claim will be
rejected. Every modification has to be carried out only at the manufacturer or an authorized service
company. Any modification not released by the manufacturer leads to the extinction of the operation
permission. For details you may ask for the PK88 service manual available at 10.- US$ (only in German
language).
1. Foot switch type
On the connector board behind the rear panel there is a jumper that defines the type of foot switch used in
combination with the PK88. Two types of foot switches available:
• "contacts open at rest": this means that the contact(s) inside the foot switch are open at rest and will
close when the foot switch is actuated. In this case the jumper has to be open (i.e. removed or put to
only one of the two pins)
• "contacts closed at rest": this means that the contact(s) inside the foot switch are closed at rest and will
open when the foot switch is actuated. In this case the jumper is has to be put on the 2-pin connector on
the pc board. This is the factory setting (e.g. for VFP2).
If the behaviour of the foot switch used with the PK88 is reverse the foot switch type setting has to be
changed. To get at the jumper the rear panel has to be removed (4 screws). The connector board is fixed to
the rear panel. The jumper is a small black or red plastic part located to the 10-pin connector leading to the
keyboard.
Remark: For all PK88 devices manufactured until end of 1999 the jumper had a different meaning (piano
mode on/off). If you are not able to change the foot switch type with the jumper as described above you
probably own a PK88 manufactured in 1999 or earlier. In this case the former user manual (without V2) is
valid !
2. MIDI channel
On the scanner board below the keyboard there are 4 solder bridges (J5...J8) to adjust the MIDI channel.
With these jumpers any MIDI channel between 1 and 16 can be selected. For this the keyboard has to be
dismounted and the jumpers in question have to be set with solder wire. If J5...J8 are left open MIDI channel
1 is selected. If J5...J8 are closed the MIDI channel is 16. For details you may ask for the PK88 service
manual available at 10.- US$. The factory setting is MIDI channel 1 (J5...J8 left open).
Appendix B: Pin Assignment of the Jack Sockets
1
2
Foot Switch 2 (Soft Pedal)
Foot Switch 1 (Sustain)
Foot Controller
1 = +7...12V DC
2 = GND
Power Supply
PK88 User's Guide V2 - Page 4
Download PDF