Kurzweil SP5-8 Service Manual

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Table of Contents
Kurzweil International Contacts .......................................................................................................................iv
Chapter 1
Introduction
Notes, Cautions, Warnings .......................................................................................................................1-1
Front Panel Features ..........................................................................................................................................1-2
Shift, Sw, and Zone Buttons and Control Sliders ...................................................................................1-2
Mode and Function Buttons .....................................................................................................................1-3
Navigation ................................................................................................................................................... 1-4
Category Buttons and KB3 LED ...............................................................................................................1-4
Double Press Buttons .................................................................................................................................1-5
Pitch and Mod Wheels ...............................................................................................................................1-5
Rear Panel Features ...........................................................................................................................................1-6
Chapter 2
Printed Circuit Boards
Function Overview ............................................................................................................................................2-1
Engine PCB Function Summary ...............................................................................................................2-1
General ..................................................................................................................................................2-1
CPU .......................................................................................................................................................2-2
Memory ................................................................................................................................................2-2
Scanning ...............................................................................................................................................2-3
Synthesis ASIC.....................................................................................................................................2-3
D-to-A converter ..................................................................................................................................2-3
USB Controller ..................................................................................................................................... 2-4
MIDI (5-pin) Interface .........................................................................................................................2-4
Voltage Regulators ..............................................................................................................................2-4
Front Panel PCBs Function Summaries ..................................................................................................2-5
Right and Left Front Panel PCBs ......................................................................................................2-6
ScanPort interface to front panel LED indicators ...........................................................................2-6
ScanPort interface to front panel buttons ........................................................................................2-6
Right Front Panel PCB ........................................................................................................................ 2-6
ScanPort interface to the keyboard ................................................................................................... 2-6
MIDI In/Out connector interface .....................................................................................................2-6
DC power input jack and voltage regulators .................................................................................. 2-7
LCD contrast voltage adjuster ...........................................................................................................2-7
Left Front Panel PCB ..........................................................................................................................2-7
Switch Pedals and CC Pedal connectors and interface .................................................................2-7
ScanPort interface to Pitch and Mod wheels...................................................................................2-8
Volume Control and control sliders .................................................................................................2-8
Audio dierential ampliers for Left/Right output jacks ............................................................2-8
Amplier for Headphones jack .........................................................................................................2-8
ScanPort analog multiplexor .............................................................................................................2-8
Audio Muting circuits ........................................................................................................................2-9
Automatic Shutdown (ERP Control) PCB .....................................................................................................2-9

Kurzweil SP5-8 Specifications

General

Keyboard number of keys	88
MIDI-keyboard number of keys	- keys
Product color	Black
Pitch bend wheel	Yes
Interface	USB
Headphone outputs	1
Input voltage	15 V
Power source type	DC
Power consumption (typical)	15 W

Weight and Dimensions

Depth	350 mm
Width	1392 mm
Height	120 mm
Weight	21000 g