Akai S 1100 Service Manual

Page 1

MIDI STEREO DIGITAL SAMPLER

MODEL 51 100

SPECIFICATIONS

Display ....................... Backlit 320 characters/240 X 64 AES/EBU

graphic LCD (Digital out) ............. RS-422 level
Disk drive ................... 3.5 dual density drive, 2Mbyte ca-

pacity (2HD), 1Mbyte capacity Connectors

(ZDD) Front panel ............. REC INPUT
Memory ...................... 2Mbyte expandable to 32Mbyte CANON PLUG x2 (L ch., R ch.)
Data format ................. 16 bit linear MIC PLUG x2 (Lch., R ch.)
Maximum number of Rear panel .............. STEREO HEADPHONE x1
samples ...................... 200 STEREO OUT x2, EFFECT SEND
Maximum number of x1, ASSIGNABLE MIX OUT x8,
programs .................... 100 EFFECT RETURN x2, FOOT SW x1,
Sampling rates ............. 44.1 /22.05 kHz, switchable MIDI IN x1 , MIDI OUT x1 , MIDITHRU

Sampling time

(unexpanded memory) 23.76 sec. (mono/sampling rate

44.1 kHz)
47.52 sec. (mono/sampling rate
22.05 kHz)
11.88 sec. (stereo/sampling rate
44.1 kHz) _
23.76 sec. (stereo/sampling rate
22.05 kHz)
Frequency response ..... 20 Hz to 20 kHz (sampling rate
22.05 kHz)
20 Hz to 10 kHz (sampling rate
22.05 kHz)
Pitch shift ................... Interpolation and decimation digi-
tal algorithm (24 bit algorithm/cus-
' tom LSI)
-I_-2 octave changeable, 1 cent/step
Filter .......................... Digital moving low pass filter (-18
dB/oct)
Envelope generator ...... 2 sets/digital ADSR
Levels/impedance
REC INPUT ............. HI : -58 dBm
(L. R./MIC PLUG) ...... MID: -38 dBm
LOW: -18 dBm
STEREO OUT
(L/mono & R CH) ...... -5dBm/600 ohms
EFFECT SEND ......... -5dBm/600 ohms

-5dBm/600 ohms

CH1 t0 CH 8 OUT

x1
Power requirement ....... AC 100 V, 50/60 Hz for Japan
AC 120 V, 60 Hz for USA and Ca-
nada
AC 220 V, 50 Hz for Europe except
UK
AC 240 V, 50 Hz for UK and Austra-
lia
Power consumption ...... Jz32W. A:50W. E,V:32W
Dimensions ................. 483(W) x 133(H) x 425(D)mm
(EIA 3U size)
Weight .. ..................... 10.1 kg
Options
EXM005 ................. Memory expansion board(2M
bytes)
EXM008 ................. Memory expansion board(8M
bytes) _
IB104 ..................... AES/EBU Digital audio interface
board
BL1000 .................. 3.5 inch 2HD blank disk
"" - l'
Standard accessories
Sound library disk .............................. 4
AC cord ............................................ 1
Operators manual .............................. 1

* For improvement purposes, specifications and design are subject to change without notice.

Page 2

k SAFETY INSTRUCTIONS

PRECAUTIONS DURING SERVICING

1. Parts indentified by the A (*) symbols are critical for
safety Replace only with parts number specified.

2. In addition to safety, other parts and assemblies are
specified forconformance with I such regulations as
those applying to spurious radiation.

These must also be replaced only with specified re-
placements.

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
turtable)

5. When replacing AC primary side components(transfor-
mers, power cords, noise blocking capacitors, etc.),
wrap ends of wires securely about the terminals be-
fore soldering.

\it e i; e i

6. Observe that wires do not contaCt heat producing
parts (heatsinks, oxide metal film resistors, fusible re-
sistors, etc.).'

it INFORMATION

SYMBOLS FOR PRIMARY DESTINATION

Alphabet indicates the destination of the units as listed
below.

Symbols Principal Destinations

USA

UK

Canada

Europe (except UK)

-Japan

Australia

W. Germany only

C

UniVersal Area

Custom version

'3

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

8. Also check areas surrounding repaired locations.

9. Use care 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 be-
tween accessible metal parts (such as chassis, ground
terminal, microphone jacks, signal input/output connec-
tors, etc.) and the earth ground through a resister of
15000hms paralleled with a 0.15 pF capacitor, under the
units normal working condition. The leakage-current
should be less than 0.5 mA rms AC.

The resistance measurement should be done between
accessible exposed metalparts and power cord plug
prongs with the power switch (it included) ON. The re-
sistance should be more than 2.2 Mohms.

SERVICE MANUAL