Roland RC-20 - User Manual

RC-20 May. 2001
1
SERVICE NOTES
First Edition
Issued by RJA
• Nominal Input Level
INPUT : -20 dBu (variable)
MIC : -40 dBu (variable)
AUX IN : -10 dBu
• Input Impedance
INPUT : 1M ohm
MIC: 1k ohm
AUX IN : 47k ohm
• Nominal Output Level
OUTPUT : -20 dBu
• Output Impedance
1k ohm
• Recommended Load
Impedance
10k ohm or greater
• Internal Memory
Recording Time : 5 min. 30 sec.
(max.)
10 loop phrases + 1 one-shot
phrase (max.)
• Controls
REC/PLAY/OVERDUB Pedal
STOP/TAP TEMPO Pedal
INST Knob
MIC Knob
PHRASE SELECT Knob
GUIDE Knob
LEVEL Knob
REVERSE Button
TAP TEMPO Button
WRITE Button
EXIT Button
AUTO START Button
MODE Button
• Indicators
POWER (serves also as battery
check indicator)
REC
PLAY
OVERDUB
PEAK
PHRASE USED
MEMORY FULL
LOOP QUANTIZE
TAP TEMPO
REVERSE
WRITE
EXIT
AUTO START
INST & MIC
NORMAL
CENTER CANCEL
FLAT AMP SIMULATE
• Connectors
INST Jack
MIC Jack
AUX IN Jack (Stereo miniature
phone type)
PHRASE SHIFT Jack
REVERSE Jack
OUTPUT Jack
• Power
DC 9V : Dry battery (AA type)
x 6, AC Adaptor
• Power Consumption
85 mA (9 V max.)
* Expected battery life under con-
tinuous use:
Carbon : 9 hours
Alkaline : 25 hours
These figures will vary depend-
ing on the actual conditions of
use.
• Dimensions
173 (W) x 158 (D) x 57 (H) mm
6-13/16 (W) x 6-1/4 (D) x 2-1/4
(H) inches
• Weight
1.2 kg / 2 lbs 7 oz (including
batteries)
• Accessories
Owner's Manual English
(#G6017294)
Dry battery <AA type> x 6
(#********)
Sound Library for RC-20 <Sam-
ple Phrase CD-ROM>
(#G2567113)
Sound Library for RC-20 <Sam-
ple Phrase CD LEAFLET>
(#G6017447)
• Options
AC Adaptor (PSA-series)
Foot Switch (FS-5U)
* 0 dBu = 0.775 Vrms
* In the interest of product
improvement, the specifications
and/or appearance of this unit
are subject to change without
prior notice.
SPECIFICATIONS
RC-20 : PHRASE RECORDER
Copyright  2001 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION.
17059083
Printed in Japan 900 (DP)
TABLE OF CONTENTS
SPECIFICATIONS ....................................................................................
LOCATION OF CONTROLS ....................................................................
EXPLODED VIEW ...................................................................................
PARTS LIST ............................................................................................
TEST MODE ............................................................................................
SERIAL DUMP AND UPDATE PROCEDURE .........................................
BLOCK DIAGRAM ...................................................................................
CIRCUIT BOARD (PANEL, JACK) ..........................................................
CIRCUIT DIAGRAM (PANEL) .................................................................
CIRCUIT DIAGRAM (JACK 1-16 LOT) ....................................................
CIRCUIT DIAGRAM (JACK 17 LOT up) ..................................................
CIRCUIT BOARD (CENTER) ..................................................................
CIRCUIT DIAGRAM (CENTER) ..............................................................
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Summary

RC-20 Specifications

Nominal Input Level

Specifies input signal levels for various inputs.

Input Impedance

Details the impedance for different input jacks.

Output Impedance

States the impedance of the output jack.

Recommended Load Impedance

Indicates the optimal load impedance for best performance.

Internal Memory

Describes the recording time and storage capacity.

Controls Overview

Lists and briefly describes all physical controls on the unit.

Indicators

Details the function of each LED indicator on the unit.

Standard Accessories

Lists standard items included with the product.

Optional Accessories

Lists optional accessories available for purchase.

Location of Controls

Exploded View

Parts List

Detailed list of all components with part codes and quantities.

Screws List

List of screws used in the assembly with part codes.

Parts List

Transistors

Lists all transistors used in the RC-20 with part codes.

Diodes

Lists all diodes used in the RC-20 with part codes.

Resistors

Lists all resistors used in the RC-20 with part codes.

Potentiometers

Lists all potentiometers used in the RC-20 with part codes.

Capacitors

Lists all capacitors used in the RC-20 with part codes.

Switches

Lists all switches used in the RC-20 with part codes.

Jacks and Terminals

Lists all jacks and external terminals with part codes.

PWB Assemblies

Lists Printed Wiring Board assemblies with part codes.

Integrated Circuits (ICs)

Lists integrated circuits used in the RC-20 with part codes.

Test Mode Procedures

Entering Test Mode

Procedure for activating the device's test mode.

Test Item Explanations

Detailed descriptions of each diagnostic test item.

Skipping to Specific Tests

Instructions on how to directly access a desired test item.

Cautions

Important notes and warnings regarding testing and servicing.

Serial Dump and Update Procedure

Procedure

Step-by-step guide for transmitting and receiving data between RC-20 units.

Block Diagram

Circuit Board Panel Jack

Circuit Diagram Panel

Circuit Diagram Jack 1-16 Lot

Circuit Diagram Jack 17 Lot Up

Circuit Board Center

Circuit Diagram Center

Roland RC-20 Specifications

General

Category	Loop Station
Maximum Recording Time	16 minutes
Sampling Frequency	44.1 kHz
Output Impedance	1 kΩ
Power Supply	DC 9 V (AC Adaptor)
Phantom Power	No
Loop Time	Up to 16 minutes
Undo/Redo	Yes
Recommended Load Impedance	10 kΩ or higher
Weight	0.9 kg
Inputs	1/4" instrument input
Outputs	1/4" output