Table of Contents
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RC-20
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) ..............................................................
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
SERVICE NOTES
First Edition
Issued by RJA
Page
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Printed in Japan 900 (DP)
SPECIFICATIONS
RC-20 : PHRASE RECORDER
• Nominal Input Level
• Power
INPUT : -20 dBu (variable)
DC 9V : Dry battery (AA type)
MIC : -40 dBu (variable)
x 6, AC Adaptor
AUX IN : -10 dBu
• Power Consumption
• Input Impedance
85 mA (9 V max.)
INPUT : 1M ohm
* Expected battery life under con-
MIC: 1k ohm
tinuous use:
AUX IN : 47k ohm
Carbon : 9 hours
Alkaline : 25 hours
• Nominal Output Level
These figures will vary depend-
OUTPUT : -20 dBu
ing on the actual conditions of
use.
• Output Impedance
1k ohm
• Dimensions
173 (W) x 158 (D) x 57 (H) mm
• Recommended Load
6-13/16 (W) x 6-1/4 (D) x 2-1/4
Impedance
(H) inches
10k ohm or greater
• Weight
• Internal Memory
1.2 kg / 2 lbs 7 oz (including
Recording Time : 5 min. 30 sec.
batteries)
(max.)
10 loop phrases + 1 one-shot
• Accessories
phrase (max.)
Owner's Manual English
(#G6017294)
• Controls
Dry battery <AA type> x 6
REC/PLAY/OVERDUB Pedal
(#********)
STOP/TAP TEMPO Pedal
Sound Library for RC-20 <Sam-
INST Knob
ple Phrase CD-ROM>
MIC Knob
(#G2567113)
PHRASE SELECT Knob
Sound Library for RC-20 <Sam-
GUIDE Knob
ple Phrase CD LEAFLET>
LEVEL Knob
(#G6017447)
REVERSE Button
TAP TEMPO Button
• Options
WRITE Button
AC Adaptor (PSA-series)
EXIT Button
Foot Switch (FS-5U)
AUTO START Button
MODE Button
* 0 dBu = 0.775 Vrms
• Indicators
* In the interest of product
POWER (serves also as battery
improvement, the specifications
check indicator)
and/or appearance of this unit
REC
PLAY
are subject to change without
OVERDUB
prior notice.
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
May. 2001
1
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Table of Contents
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Summary of Contents for Roland RC-20
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Page 1: Table Of Contents
AUX IN Jack (Stereo miniature phone type) Copyright © 2001 ROLAND CORPORATION PHRASE SHIFT Jack All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION. REVERSE Jack OUTPUT Jack 17059083... -
Page 2: Location Of Controls
RC-20 May. 2001 LOCATION OF CONTROLS [Parts] Part Code Part Name Q'ty G2017146 CASE G2187530 PEDAL R G2187531 PEDAL L G2357116 PEDAL PLATE H5029851 PEDAL SHAFT G2217133 PANEL H5029850 HEXAGON SOCKET BUTTON HEAD SCREW M4x6 F3279802 POT. RD901-40-125F-B54-00D F3279803 POT. RD901-40-125F-B54-11D F3279805 POT. -
Page 3: Exploded View
RC-20 May. 2001 EXPLODED VIEW [Parts] Part Code Part Name Q'ty G2017146 CASE G2357111 CUSHION R H5029851 PEDAL SHAFT 2215770201 PEDAL GUIDE BUSH G2177104 SPRING G2357116 PEDAL PLATE G2357115 PEDAL FOOT G2187530 PEDAL R G2187531 PEDAL L G2017148 BOTTOM COVER... - Page 4 RC-20 May. 2001 EXPLODED VIEW...
- Page 5 RC-20 May. 2001 EXPLODED VIEW Align this part with the edge surface.
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Page 6: Parts List
RC-20 May. 2001 PARTS LIST 15329521 RN1307(TE85R) TRANSISTOR Q1,Q2 on CB. Q3-Q7,Q12 on JB 15329533 RN2307(TE85R) TRANSISTOR Q3-Q10 on CB DIODE SAFETY PRECAUTION: The parts marked CONSIDERATIONS ON PARTS ORDERING CB -> CENTER BOARD ASSY, The parts marked have # are new (initial When ordering any parts listed in the parts list, please specify the following items in the order PB ->... - Page 7 RC-20 May. 2001 F5367542 10/16V CHIP CAPACITOR C2,C20,C28,C30,C32 on CB. F2259117 SHIELD SHEET C4-C9 on PB. C24,C34,C35 on JB G2177104 SPRING F5367546 100/16V CHIP CAPACITOR C18 on CB. C23,C29,C40 on JB 02341489 ECPU1C474MA5 MYLAR CAPACITOR(SUBMICRON) C10 on PB. C1,C9,C10 on JB...
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Page 8: Test Mode
RC-20 May. 2001 TEST MODE 2. Version number check • Press the right pedal. • The internal ROM version number and the external FLASH ROM ver- sion number will be indicated by the LEDs. Test items Internal ROM version number display 1. - Page 9 RC-20 May. 2001 4. LEVEL volume check • Connect your waveform measurement equipment as shown in the dia- gram below. Connect your oscilloscope to OUTPUT. (0.5 V/DIV, 1 mS/DIV) 200 Hz, 2.2 Vp-p ± 0.2 Vp-p 6. DA check • Once again check the output waveform at the point that "5. GUIDE vol- ume check"...
- Page 10 RC-20 May. 2001 • Set the INST volume to 'minimum,' and slowly move it to 'maximum.' • Connect a noise meter to OUTPUT, and verify that the reading is in the • Verify that the waveform increases smoothly. range of -22.0 dBm +/- 1.5 dBm.
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Page 11: Serial Dump And Update Procedure
• Enter Test mode. • The FLASH ROM check will occur automatically, and if there is no 4. Select the data that you want to send from the transmitting RC-20 problem, all LEDs other than "PEAK" will light. • Follow the procedure described in the section for the test you want to 1)Press the [TAP TEMPO] button to select the data that you want to send. - Page 12 "FLAT AMP SIMULATE" Waiting to transmit * The RC-20 will briefly be in this state between data items. * Since the guide sound data is divided into two parts, the RC-20 will briefly be in this state even when transmitting only the guide sound data.
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Page 13: Block Diagram
RC-20 May. 2001 BLOCK DIAGRAM RC-20 Block Diagram DRAM AD/DA +3.3V DC/DC CONVERTER BATTERY GATE ARRAY FLASH IC5A IC6A IC6B MEMORY IC2B IC2A RESET IC OUTPUT REVERSE CENTER BOARD (75D433M000) PHRASE SHIFT IC2A FLAT AMP IC2B FILTER POWER LED LED17... -
Page 14: Circuit Board (Panel, Jack)
RC-20 May. 2001 CIRCUIT BOARD (PANEL, JACK) View from component side... - Page 15 RC-20 May. 2001 CIRCUIT BOARD (PANEL, JACK) View from foil side...
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Page 16: Circuit Diagram (Panel)
RC-20 May. 2001 CIRCUIT DIAGRAM (PANEL) OVER CENTER AUTO MEMORY INST PLAY EXIT CANCEL START FULL SKQKAB D1 1SS352 SKQKAB L-34YDSL L-34GDSL L-34HDSL L-312LRD L-34HDSL L-34HDSL L-312LRD L-34HDSL TEMPO LED1 LED2 LED3 LED4 LED5 LED6 LED15 LED8 WRITE SKQKAH 1SS352... -
Page 17: Circuit Diagram (Jack 1-16 Lot)
RC-20 May. 2001 CIRCUIT DIAGRAM (JACK 1-16 LOT) AVcc 1SS302 AVcc AVcc INST IN PEAK LED POWER LED MIC IN 0.47/16S MIC IN MIC OUT 2SK880GR INST MIC OUT N2012Z601T2 AVcc INST OUT HTJ-064-12I 1/2AVcc INST IN 1SS302 AVcc N2012Z601T2... -
Page 18: Circuit Diagram (Jack 17 Lot Up)
RC-20 May. 2001 CIRCUIT DIAGRAM (JACK 17 LOT up) AVcc 1SS302 AVcc AVcc INST IN PEAK LED POWER LED MIC IN MIC IN 0.47/16S MIC OUT 2SK880GR INST MIC OUT N2012Z601T2 AVcc INST OUT HTJ-064-12I 1/2AVcc INST IN 1SS302 AVcc... -
Page 19: Circuit Board (Center)
RC-20 May. 2001 CIRCUIT BOARD (CENTER) View from component side View from foil side... -
Page 20: Circuit Diagram (Center)
RC-20 May. 2001 CIRCUIT DIAGRAM (CENTER) P103 INST_MUTE FLAT_AMP_ON/OFF P104 P105 MIC_MUTE AUX_NORM_MUTE P106 P107 AUX_C.CANCEL_MUTE REVERSE T_SHIFT FET SW D 3. 3 DA_R N2012Z601T2 D 3. 3 DA_L D 3. 3 D 3. 3 N2012Z601T2 N2012Z601T2 100/6.3 10/16 A2001WR2-14P...
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