Akai S 900 Service Manual

Page 1

AKA] 55mm mnnunl e

MIDI DIGITAL SAMPLER

moon S900
MODEL ASK90

DRUM INTERFACE

SPECIFICATIONS
System ..................... Digital sampling Communlcauon RS-232C or EQUIVALENT
Sampling frequency: 7.5 kHz ~ 40 kHz External itch MIDI (IN. OUT, THRU)
(MIN ~ MAX) REC triggerx 1
Sampling time: 63.3 sec. ~ 1 1.75 sec. Mic input/PB triggerx 1
(MAX ~ MIN) " Line input/PBtriggerx 1
Voice: 3 Voice Line output x 8
Flange: 6 Oct-vs Stereo output x 2 (LB)
Stone. ..................... Built-in FLOPPY DISK DRIVE Mix output x 1
Memory capacity: 1 M byte Voice output x 1 (13 PIN/DIN)
Memory Medium: 3.5 inch (200) Dimensions .............. 482.6 (W) x 1326 (H) x 41 O (D) mm
BOTH SIDE. DOUBLE TRACK. (EIA Rack mount/3U)
DOUBLE DENSITY Weight ..................... 10.8 kg
lntemal memory: 750K byte
Mum sampling 32
Edn Scanning (ONE SHOT, LOOPING.
ALTERNATING)
AD.S.R (Velocity-Attack.
Velocity-Release)
Velocity cross fade
Velocity switch
Positional cross fade
Attack pitch offset (- Velocity)
LFO (delay. rate. depth)
Filter (Key tracking, Velocity)
Sample merge

' For imptovement purposes, specifications and design are subject to change without notice.

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*SAFETY INSTRUCTIONS

PRECAUTIONS DURING SERVICING

1. Parts identified by the A symbol parts are critical
for safety. Replace only with 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 specified
replacements.

Examples: RF converters, tuner units, antenna
selector switches, RF cables,noise blocking capacitors,
noise blocking filters, 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 microswitch (especially
in turntable)

5. When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors, etc),
wrap ends of wires securely about the terminals
before soldering.

Wiwfiwéfl

6. Observe that wires do not contact heat producing
parts (heatsinks, oxide metal film resistors, fusible
resistors, etc).

*INFORMATION

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7. Check that replaced wires do not contact sharp
edged or pointed parts.

. Also check areas surrounding repaired locatoinsi

, Use care that foreign objects (screws, solder droplets,
etc.) do not remain inside the set.

00

SAFETY CHECK AFTER SERVICING

Confirm the specified insulation resistance between
power cord plug prongs and externally exposed parts
of the set is greater than 10 M ohms, but for equipment
with external antenna terminals (tuner, receiver, etc.)
and is intended for or I, specified insulation re
sistance should be headphone jacks line-in-out jacks etc.

more than 2.2 M ohms (ground terminals, microphone

jacks).

PRECAUTION FOR THE LITHIUM BATTERY

The LITHIUM BATTERY employed for memory Back
up has a explosive probability when the BATTERY
itself is excessive heated.

IN CASE OF REPLACING: RESOLDER and SOLDER
AS RECOMMENDED WAY.

[DANGER] [RECOMMENDED WAY]

SYMBOLS FOR PRIMARY DESTINATION

Alphabet indicates the destination of the units as listed
below.

Prin Destinations
USA

UK

Canada

Europe (except UK)

Japan

Au malia

W. Germany only
Universal Area
Custom version

SERVICE MANUAL

VOLTAGE CONVERSION

( E V B S Model only)
Before connecting the power cord. SET the VOLTAGE
SELECTOR located on the rear panel with a screwdriver
so that the correct voltage is indicated.

In

220V 240V
VOLTAGE SELECTOR

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