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Apr.2002 OD-20(T) (T) TABLE OF CONTENTS SPECIFIC.ATIONS...2 LOCATION OF CONTROLS ...4 LOCATION OF CONTROLS PARTS LIST ...5 EXPLODED VIEW ...6 EXPLODED VIEW PARTS LIST ...9 PARTS LIST...10 CHECKING THE VERSION NUMBER...13 SERVICE NOTES Issued by RJA RESTORING THE FACTORY SETTINGS ...13 TEST MODE...13 BLOCK DIAGRAM...16 CIRCUIT BOARD(JACK)...18 CIRCUIT BOARD(PANEL) ...19 CIRCUIT DIAGRAM(JACK) ...20 CIRCUIT DIAGRAM(PANEL)...22 Copyright © 2002 ROLAND CORPORATION All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION. 17058015E0 Printed in Japan (0800) (NB) Apr.2002 SPECIFIC.ATIONS OD-20: Overdrive/Distortion 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 1.1 kg / 2 lbs 7 oz (including batteries) Nominal Input Level -20 dBu Accessories Owner's Manual English :G6017351 Japanese :G6017350 Input Impedance 1 M Nominal Output Level -20 dBu Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information"):(********) Dry battery (LR6 (AA) type) x 6:(********) * We recommend that alkaline batteries be used when replacing the batteries. Output Impedance 1 k Options AC Adaptor (PSA-series) * * 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. Recommended Load Impedance 10 k or greater Dynamic Range 102 dB (IHF-A typ.) Controls EFFECT ON/OFF Pedal MANUAL/MEMORY Pedal DRIVE Knob BOTTOM Knob TONE Knob LEVEL Knob ATTACK SHAPE Knob HEAVY OCTAVE Knob TYPE Knob VARIATION Button AMP CTRL (amp control) Button MEMORY WRITE Button MEMORY SELECT Button Indicators POWER Indicator (serves also as battery check indicator) EFFECT ON/OFF Indicator MANUAL Indicator MEMORY Indicator VARIATION Indicator AMP CTRL (amp control) Indicator MEMORY Number Indicator (1-4) Connectors INPUT Jack AMP CTRL (amp control) Jack LINE OUT/PHONES Jack OUTPUT Jack AC Adaptor Jack (DC 9 V) Power Supply DC 9 V: Dry Battery (R6/LR6 (AA) type) x 6 AC Adaptor Current Draw 85 mA (9 V max.) * Expected battery life under continuous use: 8 hours 20 hours Carbon: Alkaline: These figures will vary depending on the actual conditions of use. 2 OD-20(T) 3 Apr.2002 LOCATION OF CONTROLS fig.front 1 17 16 2 3 4 5 13 6 12 11 8 9 1 8 10 15 14 7 fig.rear 2 4 3 4 5 6 7 OD-20(T) LOC