Akai MPD16 User manual

SERVICE MANUAL 1
USB / MIDI PAD CONTROL UNIT

SERVICE MANUAL
2
SAFETY INSTRUCTIONS INFORMATIONS
1. Parts identified by the symbol are critical for safety.
Replace them only with the parts number specified.
2. In addition to safety, other parts and assemblies are
specified for conformance with such regulations as those
applying to spurious radiation.
These must also be replaced only with the specified
replacements.
Examples : Noiseblockingcapacitors,noiseblockingfilters,
etc.
3. Use specified internal wiring. Note especially :
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
4. Use specified insulating materials for hazardous live parts.
Note especially :
1) Insulation Tape
2) PVC tubing
3) Spacers (insulating barriers)
4) Insulation sheets for transistors
5) Plastic screws for fixing micro switches
5. When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors, etc.),
wrap the ends of the wires securely around the terminals
before soldering.
6. Make sure that wires do not contact heat producing parts
(heat sinks, oxide metal film resistors, fusible resistors,
etc.).
7. Check that replaced wires do not contact sharp edged or
pointed parts.
8. Also check areas surrounding repaired locations.
9. Make sure that foreign objects (screws, solder droplets,
etc.) do not remain inside the set.
SAFETY CHECK AFTER SERVICING
After servicing, make measurements of leakage-current or
resistance in order to determine that exposed parts are
acceptably insulated from the supply circuit. The leakage-
current measurement should be done between accessible
metal parts (such as chassis, ground terminal, microphone
jacks,signalinput/output connectors, etc.) and the earth ground
through a resistor of 1500 ohms paralleled with a 0.15 F
capacitor, under the unit’s normal working conditions.
The leakage-current should be less than 0.5 mArmsAC. The
resistance measurement should be done between accessible
exposed metal parts and power cord plug prongs with the
power switch (if included) “ON”. The resistance should be
more than 2.2 M ohms.
SYMBOLS FOR PRIMARY DESTINATION
Unit destinations are indicated with letters as shown below.
Symbols Principal Destinations
A U.S.A
B England
E Europe
J Japan
VGermany
X1 Japan
X4 Universal Area
MAKE YOUR CONTRIBUTION TO PROTECT THE
ENVIRONMENT
Used batteries with the ISO symbol for recycling as
well as small accumulators (rechargeable batteries),
mini-batteries (cells) and starter batteries should not
be thrown into the garbage can.
Please leave them at an appropriate depot.
PRECAUTIONS FOR LITHIUM BATTERY
The lithium battery may explode when incorrectly replaced.
[OBSERVE THE FOLLOEING WHEN REPLACING]
 Replace with the same make and type or equivalent recom
mended by manufacturer.
 Place battery in correct polarity.
 Do not short the terminals.
 Do not charge battery.
 Do not dispose of battery in fire.

SERVICE MANUAL 3
SPECIFICATIONS
Functions: Transmission of MIDI Note-On/Off,Aftertouch (Key pressure), Control Change
messages
Terminals: USB USB connector x 1 (USB V1.1)
MIDI OUT 5-pin DIN x 1
DC IN 9V AC Adaptor connection x 1
Controls: Pad x 16, FULL LEVEL key, 16 LEVELS key, BANK key, ACTIVE key, Slider
Indicators: LED x 4 (FULL LEVEL, 16 LEVELS, BANK, ACTIVE)
Power: 9V DC/95mA ÐAC Adaptor MP-9 (optional)
Dimensions: 264 (W) x 205 (D) x 40 (H) mm
Weight: 950g
Accessories: Operators Manual, USB cable (1m), CD-ROM Disc
Options: AC Adaptor MP-9
* The specifications above are subject to change without prior notice.
I.

SERVICE MANUAL
4
II. SUPPLEMENTARY INFORMATION
MPD16 Utility Software Installation
1. Double click on the Installer inside the folder named Utility on the CD-
ROM to let it boot up.
2. In the Installer Wizard window, click on "NEXT".
3. In the End-User LicenseAgreement window, check on I accept the terms
in the license agreement, if you agree, and click on "NEXT".
4. Enter the user name and then click on "NEXT".
5. Check on Complete and then click on "NEXT". Do not check on Cus-
tom here, as this Utility software may not work properly .
6. Click on "Install". The installation begins.
7. Complete window appears when the installation is completed. Click on
"Finish" to finish it.
USB Driver Installation
After the computer is completely booted up, connect the MPD16 to the compu-
ter using an appropriate USB cable. The Windows will pop-up a prompt saying
that it has found the new hardware and its driver software needs to be installed.
Follow the on-screen instructions as you would install a new device, e.g. printer,
scanner, etc., to install the driver. The driver software for the MPD16 is inside
the folder named "Driver" on this CD-ROM. Specify this folder to load the file
from. After the driver has been installed, you need to restart your computer
before the MPD16 can be used.
System Conditions
OS: Windows 98/98SE, Windows Me, Windows 2000 or Windows XP
CPU: Pentium 166MHz or higher
Free disk space: 2MB or more
Display resolution: 800 x 600/ 16bit colors or higher
Windows 98/98SE, Windows Me, Windows 2000 and Windows XP are ei-
ther registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
All other product and company names are either trademarks or registered
trademarks of their respective holders.

SERVICE MANUAL 5
III. PARTS LIST
HOW TO USE THIS PARTS LIST
1. This Parts List lists those parts which are considered necessary for repairs.
2. Parts not shown in the Parts List will not in principle be supplied.
3. How to read the Parts List.
WARNING
INDICATES SAFETY CRITICAL COMPONENTS. FOR CONTINUED SAFETY, REPLACE SAFETY CRITICAL
COMPONENTS ONLY WITH MANUFACTURER'S RECOMMENDED PARTS.
AVERTISSEMENT
IL INDIQUE LES COMPOSANTS CRITIQUES DE SÉCURITÉ. POUR MAINTENIR LE DEGRÉ DE SÉCURITÉDE
L'APPAREIL, NE REMPLACER QUE DES PIÉCES RECOMMANDEES PAR LÉ FABRICANT.
1. PC MAIN BOARD BLK
Ref. No. Part No. Description
D5 ED-431276C D SCHOT 1S30-J T05
D110 ED-431276C D SCHOT 1S30-J T05
:
:
IC5 EI-811073J ICTRC-6593
IC10 EI-811068J IC HD74HC157FP
Service parts classification
These reference symbols correspond with component
symbols in the Schematic Diagrams.
2. FINAL ASSEMBLY BLK
Ref. No. Part No. Description
1. SA-349332 FOOT
2. ZS-344754C ST PAN30x06STL CMT
:
:
44. SP-417333J COVER TOP
45. ZS-418385J BT BID30X06STL BNI EATRH LOCK
46-A EW-380905J AC CORD 250S KP300 KS16A
H B J [J]
46-B EW-368420J1 AC CORD 200SKP30KS B AC [A]
46-C EW-410608J AC CORD 250 KP4819D KS31A B E
[E,V]
Symbols for primary destination
[A] U.S.A. [J] Japan
[B] England [V] Germany
[E] Europe [x1] Japan
[X4] Universal Area
Safety critical component
This number corresponds with the individual parts index number
in the figure.
ATTENTION
1. When placing an order for parts, be sure to list the Part No., Model No. and the description of each part.
Otherwise, the non-delivery of the part or the delivery of a wrong part may result.
2. Please make sure that Part No. is correct when ordering.
If not, a part different from the one you ordered may be delivered.
3. Since the parts shown in Parts List or Preliminary Service Manual may have been the subject of changes,
please use this Parts List for all future reference.

SERVICE MANUAL
6
1. PC BOARD BLK
Ref.No. 
1
2. PC MAIN BLK
Ref.No.
D30
D31
D32
D33
IC1
IC2
IC3
IC4
IC5
IC7
IC10
IC11
J1
J2
J3
P1
P2
SW1
SW2
SW3
SW4
VR1
X1
X2
D1
D2
D3
D4
D5
D6
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
F1
IC6
L1
TR1
TR2
TR3
TR4
FINAL ASSEMBLY BLK
Ref.No.
1
2
3
4
5
6
7
8
9
Description
PC MAIN BLK MPD16
Description
D LED L-934SRD-G RED
D LED L-934SRD-G RED
D LED L-934SRD-G RED
D LED L-934SRD-G RED
IC HD64F3664H QFTY
IC NET2890
IC M51953BL
IC HD74HC00P
IC BU4094BC
IC 24LC01-B I/P
IC NJU7032D
IC NJU7032D
SOCKET CONNECTER YKF45-0002 4P
DIN J M1707 5P
SOCKET DC HTJ-020-05A 1P
SOCKET 5229-20APB 20P
PLUG B5B-PH-K WHT 5P
SW TACT SKQEAD
SW TACT SKQEAD
SW TACT SKQEAD
SW TACT SKQEAD
VRSLIDE RS4511210925B14 B103S
OSC X'TAL AT-51 16.000MHZ
OSC X'TAL AT-51 48.000MHZ
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D ZENER H HZS4B3 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
D SILICON H 1SS133T-77 T26
FUSE ICP-N10 T05 50V 0.4A
IC NJM78L05AT1 T05
COIL FIX 1 LAP02TA T26 1R0K
TR 2SB1443 T05
TR 2SC3330 S,T,U T05
TR 2SC3330 S,T,U T05
TR 2SC3330 S,T,U T05
Description
CASE TOP
PAD TW-BLACK
PC PAD SENSOR
BUTTON FUNCTION
SW TACT SKQEAD
KNOB SLIDE
VRSLIDE RS4511210925B14 B103S
DISPLAY SHEET
DIN J M1707 5P
SOCKET DC HTJ-020-05A 1P
SOCKET CONNECTER YKF45-0002 4P
BT BID30X10STL BZN
Part No.
BA L4030A020A
Part No.
ED 812087J
ED 812087J
ED 812087J
ED 812087J
EI 821475X
EI 820955X
EI 375185
EI 388711J
EI 821458X
EI 821476X
EI 821282X
EI 821282X
EJ 820316X
EJ 821457X
EJ 812072J
EJ 821080X
EJ 364344
ES 415015J
ES 415015J
ES 415015J
ES 415015J
EV 821481X
EI 401963J
EI 821490X
ED 811455J
ED 811455J
ED 397100J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
ED 811455J
EF 366600
EI 438318J
EO 379354
ET 821474X
ET 362209
ET 362209
ET 362209
Part No.
SP 821464X
SE 821562X
BA 379695J1
SB 821463X
ES 415015J
SK 821466X
EV 821481X
SP 821465X
EJ 821457X
EJ 812072J
EJ 820316X
ZS 393515J

SERVICE MANUAL 7
FINAL ASSEMBLY BLOCK
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3
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SERVICE MANUAL 35
4-7-3, KITA-YAMATA, TSYZUKI-KU, YOKOHAMA, JAPAN
SERVICE SECT. PHONE : [phone] FAX : [phone]