Roland OD-20 Service Notes Download Page 1

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SERVICE NOTES

Issued by RJA

All rights reserved. No part of this publication may be reproduced in any form without the written permission
of ROLAND CORPORATION.

Printed in Japan (0800) (NB)

17058015E0

Apr.2002

OD-20(T)

TABLE OF CONTENTS

(T)

Summary of Contents for OD-20

Page 1: ...Printed in Japan 0800 NB 17058015E0 Apr 2002 OD 20 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...

Page 2: ...nnectors 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...

Page 3: ...3 OD 20 T...

Page 4: ...4 Apr 2002 LOCATION OF CONTROLS fig front fig rear 1 2 3 6 7 9 10 5 8 11 12 13 14 15 16 17 4 2 3 6 4 5 7 1 8...

Page 5: ...G2217171 LED PANEL 1 10 G2187541 PEDAL R 1 11 H5029852 SCREW 4M3 FEBZC HEXAGON SOCKET BUTTON HEAD 2 12 G2357116 PEDAL PLATE 62X53 2 13 F5029126 POWER LED L 113GDT 1 14 G247751301 VGA KEYTOP S WITHOUT...

Page 6: ...6 Apr 2002 EXPLODED VIEW fig expro1 33 32 26 24 c k 21 b d 23 25 b e f...

Page 7: ...7 OD 20 T fig expro2 a 11 18 a 12 18 11 16 j 14 15 17 10 13...

Page 8: ...8 Apr 2002 fig expro3 1 2 5 3 i 4 g h RIGHT SIDE LEFT SIDE 9 6 7 8...

Page 9: ...G2537552 LABEL CAUTION QUICK MANUAL 1 21 G2477122 R KNOB 7 23 G2257129 INSULATING SHEET 1 24 G2217170 PANEL 1 25 G2217172 REAR PANEL 1 26 G2217171 LED PANEL 1 32 G247751301 VGA KEYTOP S WITHOUT LENS...

Page 10: ...B 2 JACK EXT TERMINAL 13449150MF HTJ 064 12D PHONE JACK STEREO JK1 JK2 JK3 on JB 3 13449155MF HTJ 064 12I PHONE JACK MONO JK4 on JB 1 F3449415 KM02009AB ADAPTOR JACK JK5 on JB 1 PWB ASSY E 75D693P000...

Page 11: ...B 2 POTENTIOMETER F3279819 RD901 40 125F B54 0CD 50KB ROTARY POT W CENTER CLICK VR2 on PB 1 F3279802 RD901 40 125F B54 00D POTENTIOMETERNO CLICK 50KB VR1 VR3 VR4 VR5 VR6 on PB 5 F3279803 RD901 40 125F...

Page 12: ...39414 NYLON WASHER M5 1X9 5X0 5 BLACK 2 H5019430 SCREW M2 6X5 BINDING HEAD TAPTITE FEZC 2 H5039521 VR ACCESSORY NUT M7 7 H5039112 WASHER M9 4 PACKING G2627250 PACKING CASE 1 G2607212 PACKING CASE LOWE...

Page 13: ...RY 2 MEMORY 3 MEMORY 4 MANUAL MEMORY Number Indication Lighting Pattern 1 Only the indicator for the selected memory lights up Carrying out the following procedure completely clears the content curren...

Page 14: ...er LEDs will be dark Press the switches in the following order and verify that in a similar way only one LED at a time is lit 2 Press the AMP CTRL switch and verify that only the AMP CTRL LED is lit 3...

Page 15: ...ark and the output signal will be muted Verify that the noise for L and R is less than 68 dBm IHF A 8 DSP thru check 1 Set the TYPE volume to HM 2 MT 2 2 Connect an oscillator to INPUT and input a 344...

Page 16: ...ONVERTER Q11 EEPROM IC4 BUFFER Q1 PRE EMPHASI S AF AD IC1 BUFFER Q12 DE EMPHASIS BATTERY CN4 TR SW TR SW Q6 Q9 9V CN3 CN5 WIRING 10P WIRING 15P CN1 CN2 CN1 CN2 VR1 VR2 VR3 VR4 VR5 VR6 VR7 SW1 SW2 SW3...

Page 17: ...18 Apr 2002 CIRCUIT BOARD JACK Circuit_Jack 1 eps Circuit_Jack 2 eps...

Page 18: ...19 OD 20 T CIRCUIT BOARD PANEL Circuit_Panel eps...

Page 19: ...1 A1 2 A2 3 VSS 4 SDA 5 SCL 6 WP 7 VCC 8 R18 27 2W R37 10 C24 0 1 C23 10 16 C25 10 16 C26 0 1 C30 0 1 C29 1 50 JK1 HTJ 064 12D 1 2 3 C5 0 0022 C6 100p C7 10 16 R16 47k R8 47k IC1A NJM2100M 2 3 1 R12...

Page 20: ...5F B54 00D 1 2 3 VR1 RD901 40 125F B54 00D 1 2 3 VR3 RD901 40 125F B54 00D 1 2 3 VR6 RD901 40 125F B54 00D 1 2 3 VR5 RD901 40 125F B54 00D 1 2 3 VR7 RD901 40 125F B54 11D 1 2 3 LED12 L 113GDT 1 2 LED5...

Page 21: ...24 Apr 2002...