EasyManua.ls Logo

Yamaha SPX50D Service Manual

Yamaha SPX50D
31 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
DIGITAL
SOUND PROCESSOR
SERVICE
MANUAL
CONTENTS
(S'A)
SPECIFICATIONS
(|g-a-f±W
2
PANELLAYOUT
TO
I')
3
CIRCUIT BOARD
LAYOUT
(zl
~
y
h
U
T
T
't7>
)
4
BLOCKDIAGRAM (^ y
^ Y
T
A)
6
DIMENSIONS
(^>±[H)
6
LSI DATA
TABLE
(LSliffi^^#!*)
7
1C
BLOCK
DIAGRAM
(1C
yn
y^m)
10
CIRCUIT
BOARDS
12
DISASSEMBLY
PROCEDURE
16
TEST
PROGRAM
(y^hynyyA)
19
CHECKS
22
ADJUSTMENTS
(H^)
24
ERROR MESSAGES
(:c7-y
y-tz-y)
24
MIDI DATA
FORMAT
(
MIDI
y-y
y
^
-
v
y h
)
25
MIDI
IMPLEMENTATION CHART
27
PARTS
LIST
006865
YAMAHA
GORP
HAMAMATSU,
JAPAN
2.64K-313
Printed in
Japan
’88.6.

Other manuals for Yamaha SPX50D

Question and Answer IconNeed help?

Do you have a question about the Yamaha SPX50D and is the answer not in the manual?

Yamaha SPX50D Specifications

General IconGeneral
Number of Effects50
Sampling Frequency44.1 kHz
Frequency Response20 Hz - 20 kHz
Dynamic Range100 dB
Power SupplyAC Adapter
TypeMulti-Effects Processor
EffectsReverb, Delay, Modulation, Pitch, EQ
THD0.05%
MIDIIn/Out

Summary

Specifications

ELECTRICAL CHARACTERISTICS

Details of the unit's electrical performance parameters including frequency response, dynamic range, and THD.

FRONT PANNEL

Description of controls and indicators on the front of the unit, such as keys, display, and input level controls.

REAR PANEL

Description of connectors and controls on the rear of the unit, including input, output, and MIDI ports.

MIDI Terminals

Specification of MIDI input and output connectors and their functions.

GENERAL

General specifications including dimensions, weight, and power consumption.

Panel Layout

Front Panel

Labeled diagram of the front panel controls and displays, with corresponding numbers.

Rear Panel

Labeled diagram of the rear panel connectors, with corresponding numbers.

Circuit Board Layout

Block Diagram

Dimensions

LSI Data Table

YM3901 (XC282001) ADA

Pinout and function details for the YM3901 ADA LSI.

YM3807 (IT380700) Modulation Data Generator

Pinout and function details for the YM3807 Modulation Data Generator LSI.

LSI Data Tables Continuation

HD6303Y (XE386A00) CPU

Pinout and function details for the HD6303Y CPU LSI.

HD63B50P (IG147300) Asynchronous Communications Interface Adapter

Pinout and function details for the HD63B50P ACIA LSI.

PCM54HP (XA566001) Digital to Analog Converter

Pinout and function details for the PCM54HP DAC LSI.

LSI Data Tables Continuation

YM3804 (IT380400) Digital Signal Processor

Pinout and function details for the YM3804 DSP LSI.

IC Block Diagram

Component Descriptions

TC4053BP (IG055100) Triple 2-Ch. Multiplexer/Demultiplexer

Pinout and function details for the TC4053BP IC.

M5238P (XA013001) NJM4558DV (IG001390) Dual Operational Amplifier

Pinout and function details for the M5238P Dual Operational Amplifier IC.

IR9311 (IG134900) Comparator

Pinout and function details for the IR9311 Comparator IC.

Disassembly Procedure

1. Removal of Top cover

Step-by-step guide to remove the top cover of the unit.

2. Removal of AD Circuit board

Steps to remove the AD circuit board after the top cover.

Disassembly Procedure Continuation

3. Removal of PW circuit board

Steps to remove the PW circuit board from the unit.

4. Removal of FP circuit boards

Steps to remove various FP (Front Panel) circuit boards.

Disassembly Procedure Continuation

4-3 Removal of FP3/4 circuit board.

Specific steps to remove the FP3/4 circuit board.

4-4 Removal of the FP4/4 circuit board.

Specific steps to remove the FP4/4 circuit board.

5. Removal of the LCD circuit board.

Steps to remove the LCD circuit board.

Test Program

A. Test Program Activation Method

How to enter the diagnostic test program by pressing specific switches.

B. Test Program No. Selection Method

How to select specific test routines using MEMORY and arrow keys.

C. Return to Normal Operation from Test Program

How to exit the test program and return to normal operation.

1. TEST1: LCD Check

Procedure to test the functionality of the LCD display by cycling segments.

2. TEST2: LED Check

Procedure to test the functionality of the unit's LEDs by sequential display.

Test Program Continuation

3. TEST3: Switch Check

Procedure to verify the operation of all switches and foot switches.

4. TEST4: AD OFFSET Adjustment

Procedure to adjust the AD converter offset voltage for optimal performance.

Test Program Continuation

5. TEST5: User's memory setting

Procedure for copying user memory presets to other locations.

6. TEST 10-17 : DRAM CHECK

Procedure to check the DRAM memory modules for errors.

Checks

1. PREPARATIONS

Initial setup of front panel controls and rear panel switches for checks.

1-1 Preparatory Settings

Specific initial settings for volume and switches.

1-2 Measuring Instruments

Specifications for filters and signal generators used in measurements.

2. INSPECTIONS

Procedures and criteria for checking the unit's performance parameters.

2-1 Gain

Verification of input signal to output signal level.

2-2 Frequency Characteristics

Verification of output frequency response across different bands.

2-3 Distortion Factor

Measurement of signal distortion at specific input levels.

2-4 Maximum Output

Maximum output signal level with acceptable distortion.

Checks Continuation

2-5 Meter Seusitivity

Procedure to verify the input level meter sensitivity.

2-6 Muting Circuit

Verification of the muting circuit's operation during power on.

2-7 Noise Level

Measurement of the output noise levels against specifications.

Adjustments

1. PREPARATIONS

Initial setup for performing adjustments, including input level and load resistors.

2. ADJUSTMENTS

Procedures for adjusting clipping, distortion, output levels, and noise.

Error Messages

MIDI Data Format

1. Reception Conditions

Conditions for receiving MIDI messages, including channel and mode settings.

2. Reception Data

Details of received MIDI data, including status and note information.

2-1. Channel Information

Channel voice messages like NOTE ON/OFF and PROGRAM CHANGE.

MIDI Implementation Chart

Circuit Boards

Circuit Boards Continuation

FP Circuit Board

Layout and component identification for the FP circuit board.

PW Circuit Board

Layout and component identification for the PW circuit board.

Parts List

Related product manuals