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Roland Boss RC-20XL User Manual

Roland Boss RC-20XL
27 pages
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SERVICE NOTES
Issued by RJA
Copyright © 2004 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of ROLAND CORPORATION.
Printed in Japan (0500) (TP)17058256E0
Sep.2004
RC-20XL
TABLE DF CONTENTS
CAUTIONARY NOTES ...................................................2
SPECIFICATIONS.............................................................2
LOCATION OF CONTROLS ..........................................4
LOCATION OF CONTROLS PARTS LIST ...................5
EXPLODED VIEW, EXPLODED
VIEW PARTS LIST ........................6
PARTS LIST......................................................................10
CHECKING THE VERSION NUMBER.......................13
SERIAL DUMP (SYSTEM UPDATE, USERS
DATA SAVE AND LOAD) ..............13
INSTRUCTIONS FOR FACTORY RESET ...................14
TEST MODE.....................................................................14
BLOCK DIAGRAM.........................................................19
CIRCUIT BOARD (PANEL) ..........................................20
CIRCUIT DIAGRAM (PANEL).....................................22
CIRCUIT BOARD (JACK)..............................................24
CIRCUIT DIAGRAM (JACK 1) .....................................26
CIRCUIT DIAGRAM (JACK 2) .....................................28
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Roland Boss RC-20XL Specifications

General IconGeneral
TypeLoop Station
Recording Time16 minutes (mono)
Number of Loops1
Power9V DC adapter
Outputs1/4" output

Summary

CAUTIONARY NOTES AND PRODUCT OVERVIEW

User Data Status

Describes how user data is preserved or deleted after certain operations.

Product Specifications Overview

Covers power, dimensions, weight, accessories, and options.

Unit Components Description

Describes controls, indicators, and connectors.

Parts List Disclaimer

Explains limitations on supplying parts as service parts.

SPECIFICATIONS DETAILS

Input/Output Characteristics

Details nominal input/output levels and impedance characteristics.

Internal Memory Details

Specifies internal memory capacity and recording duration.

LOCATION OF CONTROLS

Control Panel Layout

Illustrates the front panel with numbered controls for identification.

Control Element Descriptions

Lists and briefly describes each control element shown on the panel.

LOCATION OF CONTROLS PARTS LIST

Control Parts Identification

Detailed list of part codes, names, descriptions, and quantities for controls.

EXPLODED VIEW 1 AND PARTS LIST

Exploded View 1 Components

Diagram and list of components for the first exploded view section.

EXPLODED VIEW 2 AND PARTS LIST

Exploded View 2 Components

Diagram and list of components for the second exploded view section.

EXPLODED VIEW 3 AND PARTS LIST

Exploded View 3 Components

Diagram and list of components for the third exploded view section.

EXPLODED VIEW (FIG. A) AND PARTS LIST

Exploded View (Fig. A) Components

Diagram and list of components for the Fig. A exploded view section.

PARTS LIST (CHASSIS, SWITCHES, JACKS, ICs, TRANSISTORS)

Chassis, Knob, Switch, and Jack Parts

Lists components for chassis, knobs, switches, and jacks.

PCB, IC, and Transistor Parts

Lists components for PCBs, integrated circuits, and transistors.

PARTS LIST (DIODES, RESISTORS, CAPACITORS)

Diode and Resistor Components

Lists various diodes and resistors with specifications and locations.

Potentiometer and Capacitor Components

Lists potentiometers and capacitors with their specifications.

PARTS LIST (COILS, CONNECTORS, HARDWARE)

Coil, Crystal, Connector, and Cable Parts

Lists coils, crystals, connectors, and wiring components.

Hardware, Packing, and Accessory Parts

Lists screws, packing materials, miscellaneous items, and accessories.

VERSION CHECK AND SERIAL DUMP

Checking the Version Number

Explains how to check internal ROM and external FLASH version numbers via LEDs.

Serial Dump Procedure

Details the steps for transmitting and receiving data between units.

Serial Dump Data Types and Notes

Explains transmittable data types and important notes for the process.

FACTORY RESET AND TEST MODE INTRODUCTION

Instructions for Factory Reset

Step-by-step guide to restore the unit to its original factory settings.

Test Mode Overview

Introduces the test mode and lists general test items required.

TEST MODE PROCEDURES (PART 1)

FLASH ROM Check

Verifies the integrity of the FLASH ROM by checking LED indicators.

Version Number Check

Explains how to verify internal ROM and external FLASH version numbers.

Switches and LED Check

Tests the functionality of switches and LEDs using external equipment.

LEVEL Volume Check

Verifies the LEVEL volume control's effect on output waveform.

TEST MODE PROCEDURES (PART 2)

GUIDE Volume Check

Verifies the GUIDE volume control's effect on output waveform.

DA Check

Checks DC leakage and level of the output waveform.

OUTPUT Check

Verifies the output waveform with INST and MIC volumes set.

INST Volume Check

Verifies the INST volume control's effect on output waveform.

TEST MODE PROCEDURES (PART 3)

MIC Volume Check

Verifies the MIC volume control's effect on output waveform.

MUTE Check

Verifies the output waveform and noise level in mute condition.

AUX IN (NORMAL) Check

Tests AUX IN functionality in NORMAL mode via waveform.

AUX IN (FLAT AMP SIMULATE) Check

Tests AUX IN functionality in FLAT AMP SIMULATE mode.

TEST MODE PROCEDURES (PART 4)

AUX IN (CENTER CANCEL) Check

Tests AUX IN functionality in CENTER CANCEL mode.

AUX IN (L ch) Check

Tests AUX IN functionality with L channel input via waveform.

Solder Spot Check

Verifies solder joints by checking output waveform conditions.

Noise Check

Measures residual noise output under various volume and drop conditions.

BLOCK DIAGRAM

System Block Diagram

Illustrates the overall system architecture and component interconnections.

CIRCUIT BOARD (PANEL)

Panel Board Component Layout

Shows the placement of components on the main panel circuit board.

Panel Board Foil Side Layout

Displays the trace layout on the foil side of the panel circuit board.

CIRCUIT DIAGRAM (PANEL)

Panel Circuit Diagram

Detailed schematic showing the electrical connections of the panel board.

CIRCUIT BOARD (JACK)

Jack Board Component Layout

Shows the placement of components on the jack board circuit board.

Jack Board Foil Side Layout

Displays the trace layout on the foil side of the jack board circuit board.

CIRCUIT DIAGRAM (JACK 1)

Jack 1 Circuit Diagram

Detailed schematic showing electrical connections for Jack 1.

CIRCUIT DIAGRAM (JACK 2)

Jack 2 Circuit Diagram

Detailed schematic showing electrical connections for Jack 2.

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