CHD KM500-KBD, Руководство по обслуживанию

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Korg M500 Interface Korg M500 Interface Korg M500 Interface Korg M500 Interface
KM500 KM500 KM500 KM500----KBD KBD KBD KBD
Service Manual Service Manual Service Manual Service Manual
8 88 8----428 / v. 1.00 428 / v. 1.00 428 / v. 1.00 428 / v. 1.00
Copyright © 2019 CHD Elektroservis. All rights reserved.
No part of this publication may be reproduced in any form without the written permission of CHD Elektroservis.
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4. Switch the instrument on by main switch joined with the POWER/VOLUME knob and turn the knob fully
clockwise (to maximum).
5. Now, the interface is in "Stand-by" mode - the interface’s indication LED is off. If not, press the "RESET"
button of the interface
2 22 2
.
6. Wait a few minutes Wait a few minutes Wait a few minutes Wait a few minutes to stabilize the temperature of all instrument circuits.
7. Measure the voltage between pins of the "TP" jumper head (fig. 2) with a quality digital multimeter. It
should be zero volts exactly. If it is not, adjust it with "OFFSET” variable resistor (fig. 2).
Figure
Figure Figure
Figure 3
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8. Press the C3 key on the instrument’s keyboard (fig. 3) – the
interface’s indication bi-color LED remains off.
9. Measure the output tone frequency by the tuner (frequency meter).
It should be 1047 Hz approx. Remember the measured tone
frequency. Then release the C3 key.
10. Press the C3 key on the master keyboard (i.e. send MIDI Note Nr. 84 to the interface) and hold it. The
interface’s indication LED will light in green.
11. Check the output tone frequency by the tuner (frequency meter) again. It must be the same as the
frequency measured in paragraph 9. If it is not, adjust it with "RANGE” variable resistor on the interface
board (fig. 2.9.1).
12. Release the C3 key on the master keyboard. Switch the instrument off and close the instrument.
KORG M500 MIDI Interface
Model KM500-KBD, Nr. 8-428, ver. 1.00
Document: 842810_service
Manufacturer: CHD Elektroservis, Czech Republic
www.chd-el.cz info@chd-el.cz
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It is suppossed that the interface is in "Factory Reset" status before the adjustment procedure. If it is not, send the F0 00 20 21 7F 54 50 03 7F 5A
F0 00 20 21 7F 54 50 03 7F 5A F0 00 20 21 7F 54 50 03 7F 5A
F0 00 20 21 7F 54 50 03 7F 5A
F7 [hex] F7 [hex] F7 [hex] F7 [hex] SysEx message to the intarface first.