Yamaha-A-4000-Service-Manual.pdf

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PROFESSIONAL SAMPLER
SERVICE MANUAL
CONTENTS
SPECIFICATIONS ................................................................................ 3
PANEL LAYOUT .................................................................................. 4
CIRCUIT BOARD LAYOUT ................................................................... 5
BLOCK DIAGRAM ............................................................................... 6
DISASSEMBLY PROCEDURE ............................................................ 7
LSI PIN DESCRIPTION ...................................................................... 10
IC BLOCK DIAGRAM ......................................................................... 16
TEST PROGRAM ............................................................................. 19
ERROR MASSAGE ........................................................................... 31
MIDI DATA FORMAT .......................................................................... 32
MIDI IMPLEMENTATION CHART ........................................................ 43
PARTS LIST
OVERALL CIRCUIT DIAGRAM
CIRCUIT BOARDS
SY
011491
A5000 19991210-229000
A4000 19991210-149000
HAMAMATSU,JAPAN
1.57K-859 I Printed in Japan2000.01
A5000/A4000
IMPORTANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been
assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are
already known and understood by the users, and have therefore not been restated.
WARNING:
Failure to follow appropriate service and safety procedures when servicing this product may
result in personal injury, destruction of expensive components and failure of the product to per
form as specified. For these reasons, we advise all Yamaha product owners that all service
required should be performed by an authorized Yamaha Retailer or the appointed service
repre sentative.
This presentation or sale of this manual to any individual or firm does not constitute authoriza-
tion, certification, recognition of any applicable technical capabilities, or establish a principal-
agent relationship of any form.
IMPORTANT:
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research
engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifica-
tions are, therefor, inevitable and changes in specification sre subject to change without notice or obligation to
retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.
WARNING:
Static discharges can destroy expensive components. Discharge any static electricity your
body may have accumulated by grounding yourself to the ground buss in the unit (heavy gauge
black wires connect to this buss).
Turn the unit OFF during disassembly and parts replacement. Recheck all work before you
apply power to the unit.
IMPORTANT:
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical / electronic and / or
plastic (where applicable) components may also contain traces of chemicals found by the California Health and
Welfare Agency (and possibly other entities) to cause cancer and / or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL / ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY
REASON WHAT SO EVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or
expose eyes to solder / flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands
before handling food.
WARNING
Components having special characteristics are marked
originally installed.
and must be replaced with parts having specification equal to those
A5000/A4000
SPECIFICATION
Tone generation method
AWM2 tone generator
Maximum Polyphony
126 notes (64 notes on the A4000), 32 multi-timbre parts (16 parts on the A4000)
A/D conversion
20 bit 64-times oversampling
D/A conversion
24 bit 8-times oversampling
Digital I/O (only when AIEB1 I/O expansion board is installed)
Input/output
DIGITAL connectors
OPTICAL connectors
Input frequency
Output frequency
48 kHz, 44.1 kHz, 32 kHz
44.1 kHz
S/P-DIF (coaxial)
S/P-DIF (optical)
Function buttons (six buttons)
COMMAND/EXIT button
ASSIGNABLE button
AUDITION button
LCD (320 x 80 dot, LED backlight)
LCD contrast control
3.5" 2HD/2DD dual mode floppy disk drive
Rear panel
STEREO OUT L/MONO, R (phone jack x 2)
ASSIGNABLE OUT L, R
(phone jack x 2)
MIDI IN-A/B, OUT, THRU-A/B (IN, OUT, THRU on the A4000)
SCSI (half-pitch, 50-pin)
Expansion board slot
Power supply connector (AC inlet)
Fan
Dimensions
Two-space rackmount unit
W 480 mm x D 461 mm x H 90 mm (18-7/8” x 18-1/8” x 3-9/16”)
Weight
8.0 kg (17l bs 10 oz)
Included items
Power cable
CD-ROM set
(See the separate “Guide for the Accompanying Disks” booklet)
FD
Power Cable for Internal Hard Disk (long)
Power Cable for ZIP Drive (short)
SCSI Cable for Internal Hard Disk
IDE Cable for Internal Hard Disk
Owner’s manual
Options (made by Yamaha)
AIEB1: I/O expansion board
Internal expansion devices (made by other manufacturers)
Expansion memory
(use a pair of identical-size 72pin SIMM modules of the following types)
Access time
Bit Width
70 ns or less
x 32 (no parity) or x 36 bit (parity)
Fast Page or EDO, JEDEC standard.
Capacity
4 megabyte/8 megabyte/16 megabyte/32 megabyte
x4
x1
x1
x1
x1
x1
x1
Sampling frequency
Analog input
44.1, 22.05, 11.025 kHz, 5.5125 kHz (mono and stereo)
Digital input (only when AIEB1 I/O expansion board is installed)
48 kHz, 44.1 kHz, 32 kHz external synchronized recording
(stereo only)
1/2, 1/4 and 1/8 undersampling is supported
Internal sample memory capacity
Standard
Maximum
4 Mbytes (installed on-board)
128 Mbytes
(When four 32 Mbyte 72 pin SIMM modules are installed. The on-
board 4 Mbytes are unused only if memory has been expanded to the
maximum.)
Sampling time
Maximum sample length
32 Mbytes monaural
64 Mbytes stereo
Maximum sampling time (mono or stereo)
6 minutes 20 seconds (44.1 kHz)
12 minutes 40 seconds (22.05 kHz)
25 minutes 21 seconds (11.025 kHz)
50 minutes 43 seconds (5.5125 kHz)
Effects
6 effect blocks (3 on the A4000)
Total equalizer (4 bands)
Sample equalizer
Program
128 program
Sequencer
Real-time recording and playback
Front panel
POWER switch
INPUT L,R jacks (phone x 2)
REC VOLUME (L& R shared)
MASTER VOLUME (L&R shared, STEREO OUT & PHONES shared)
PHONES OUTPUT jack
Knobs (1 - 5)
Mode buttons (PLAY, EDIT, REC, DISK, UTILITY)
Internal hard disk drive (3.5 inch) performance requirements
Interface
Power supply
50-pin SCSI or 40-pin IDE
+5 V
+12 V
Internal ZIP Drive
Interface
Power supply
40-pin IDE (ATAPI)
+5 V
0.8 A
maximum 840 mA
maximum 2400 mA
3
A5000/A4000
PANEL LAYOUT
Front Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Master Vol [Master Volume]
Rec Vol [Recording Volume]
Phones jack
Input L, Input R jacks
LCD Contrast
Display
Knobs 1-5
Mode buttons
Function buttons [F1]-[F6]
Command Exit button
Assignable button
Audition button
Floppy Disk Drive
Power switch
Rear Panel
1
2
3
4
5
6
7
8
AC inlet
Midi In-A, In-B, Out, Thru-A, Thru-B (A5000)
connectors / Midi In, Out, Thru (A4000) connectors
Assignable Out L, R jacks
Stereo Out L/Mono, R jacks
SCSI connector
Optical In, Out connectors
Digital In, Out connectors
Assignable Out jacks 1-6
4
A5000/A4000
CIRCUIT BOARD LAYOUT
5

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