Akai S900 Service Manual

AKAT Service MANUAL
MIDI DIGITAL SAMPLER
MODEL $900
MODEL ASK9O
DRUM INTERFACE
SPECIFICATIONS
System
.............cesee00
Digital
sampling
Communication.......
RS-232C
or
EQUIVALENT
Sampling frequency: 7.5 kHz ~ 40 kHz External jack............ MIDI (IN, OUT, THRU)
(MIN ~ MAX) REC trigger x 1
Sampling time: 63.3 sec. ~ 11.75 sec. Mic input/P.B trigger x 1
(MAX ~ MIN) * Line input/P.B trigger x 1
Voice: 8 Voice Line output x 8
Range: 6 Octave Stereo output x 2 (LR)
Storage.............--0000 Built-in FLOPPY DISK DRIVE Mix output x 1
Voice output x 1 (13 PIN/DIN)
Dimensions............... 482.6 (W) x 132.6 (H) x 410 (D) mm
(EIA Rack mount/3U)
Memory capacity: 1M byte
Memory Medium: 3.5 inch (2DD)
BOTH SIDE, DOUBLE TRACK,
DOUBLE DENSITY SNE saxcecisecscerccsasnce
Internal memory: 750K byte
Multi sampling ........ 32
BAG sivctctssciesinisieesines 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)
* For improvement purposes, specifications and design are subject to change without notice.

Akai S900 Specifications

General

Type	Digital Sampler
Polyphony	8 voices
Bit Depth	12-bit
MIDI	In, Out, Thru
Filter	Low-pass filter
Outputs	8 individual outputs
Memory	750 KB

Summary

SPECIFICATIONS

System

Details on sampling frequency, time, voice, and octave range.

Storage

Information on built-in floppy drive and internal memory capacity.

Multi sampling

Edit

Communication

Dimensions

Weight

SAFETY INSTRUCTIONS

PRECAUTIONS DURING SERVICING

Guidelines for safe servicing procedures and part replacement.

SAFETY CHECK AFTER SERVICING

Procedures for verifying insulation resistance post-service.

PRECAUTION FOR THE LITHIUM BATTERY

Warnings regarding lithium battery handling and potential hazards.

SYMBOLS FOR PRIMARY DESTINATION

Explanation of country/region codes used for product destinations.

VOLTAGE CONVERSION

Instructions for setting the correct voltage selector for regional use.

ADJUSTMENT

ADJUSTMENT OF REC AMP OFF-SET

ADJUSTMENT OF PB AMP OFF-SET

MIDI IMPLEMENTATION CHART

PARTS LIST

HOW TO USE THIS PARTS LIST

RECOMMENDED SPARE PARTS LIST

INFORMATION OF ICs

VOICE BLOCK DIAGRAM

FDD BLOCK DIAGRAM SCHEMATIC DIAGRAM

ASK90 DRUM INTERFACE SCHEMATIC DIAGRAM

POWER SUPPLY SCHEMATIC DIAGRAM

PANEL SCHEMATIC DIAGRAM