Text preview for : boss OD-20(T).pdf part of Boss OD20 OD20 overdrive service manual
Back to : boss OD-20(T).pdf | Home
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)
LOCATION OF CONTROLS PARTS LIST
[Front]
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 PART CODE H5029855 G2477122 F3279802 G247751001 G2477122 F3279803 H5029851 1502928100 G2187540 G2017180 G2217171 G2187541 H5029852 G2357116 F5029126 G247751301 1502928100 G2217170 G2477122 F3279819 PART NAME SCREW M4X8 R-KNOB POTENTIOMETERNO CLICK 50KB VGA KEYTOP S BLACK WITH LENS R-KNOB POTENTIOMETER 11 CLICKS 50KB PEDAL SHAFT LED (RED) PEDAL L CASE LED PANEL PEDAL R SCREW 4M3 FEBZC PEDAL PLATE POWER LED VGA KEYTOP S WITHOUT LENS LED (RED) PANEL R-KNOB POTENTIOMETER CENTER CLICK 50KB DESCRIPTION HEXAGON BUTTON HEAD RD901-40-125F-B54-00D Q'TY 4 5 5 2 1 1 1 3 1 1 1 1 2 2 1 2 4 1 1 1
RD901-40-125F-B54-11D L-34HDSL
HEXAGON SOCKET BUTTON HEAD 62X53 L-113GDT
L-34HDSL
RD901-40-125F-B54-0CD
[Rear]
No. 1 2 3 4 5 6 7 8 PART CODE 13449150MF G2537552 G2217172 G2017621 G2017148 G2357118 F3449415 13449155MF PART NAME PHONE JACK (STEREO) LABEL CAUTION REAR PANEL BATTERY COVER BOTTOM COVER BOTTOM FOOT ADAPTOR JACK PHONE JACK (MONO) DESCRIPTION HTJ-064-12D Q'TY 3 1 1 1 1 1 1 1
KM02009AB HTJ-064-12I
5
Apr.2002
EXPLODED VIEW
fig.expro1
b
23
21
k d b c
26
24
32
33 25
e f
6
OD-20(T)
fig.expro2
11 12
a 18
17
10 a 13 j 15 16 14
18 11
7
Apr.2002
fig.expro3
7
6
h g
2
8 RIGHT SIDE 9 LEFT SIDE
1
5 i 4 3
8
OD-20(T)
EXPLODED VIEW PARTS LIST
[Part]
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 21 23 24 25 26 32 33 PART CODE G2017180 G2357111 H5029851 2215770201 2217710900 G2357116 G2357115 G2187541 G2187540 G2017148 G2357118 G2017621 G2017620 G2177308 G2177309 G2177307 G2257130 G2537552 G2477122 G2257129 G2217170 G2217172 G2217171 G247751301 G247751001 PART NAME CASE CUSHION R PEDAL SHAFT PEDAL GUIDE BUSH COIL SPRING PEDAL PLATE PEDAL FOOT PEDAL R PEDAL L BOTTOM COVER BOTTOM FOOT BATTERY COVER BATTERY CASE BATTERY TERMINAL(+) BATTERY TERMINAL(-) BATTERY TERMINAL(+-) BATTERY INSULATING SHEET LABEL CAUTION QUICK MANUAL R-KNOB INSULATING SHEET PANEL REAR PANEL LED PANEL VGA KEYTOP S WITHOUT LENS VGA KEYTOP S BLACK WITH LENS DESCRIPTION Q'TY 1 2 2 2 2 2 2 1 1 1 2 1 1 1 1 1 1 1 7 1 1 1 1 2 2
215-702 214-109 62X53 M8
[Screw]
No. a b c d e f g h i j k PART CODE H5029115 H5019110 H5029855 H5039205 H5039112 H5039510 H5029852 H5039413 H5039414 H5019430 H5039521 PART NAME SCREW 3X8 SCREW M3X6 SCREW M4X8 WASHER 12.5X9.5X0.5/0.9 WASHER M9 NUT M9X12X2 SCREW 4M3 FEBZC NYLON WASHER M4.1X7.5X0.5 NYLON WASHER M5.1X9.5X0.5 SCREW M2.6X5 VR ACCESSORY NUT M7 DESCRIPTION PAN TAPTITE-2 FEBZC PAN TAPTITE-2 FEZC HEXAGON SOCKET BUTTON HEAD FENI INTERNAL TOOTH FENI FENI HEXAGON SOCKET BUTTON HEAD BLACK BLACK BINDING HEAD TAPTITE FEZC Q'TY 7 9 4 4 4 4 2 2 2 2 7
9
Apr.2002
PARTS LIST
fig.part1e
SAFETY PRECAUTIONS: The parts marked have safety-related characteristics. Use only listed parts for replacement.
CONSIDERATION ON PARTS ORDRING
When ordering any parts listed in the parts list, please specify the following items in the order sheet. QTY PART NUMBER DESCRIPTION MODEL NUMBER Ex. 10 22575241 Sharp Key C-20/50 15 2247017300 Knob (orange) DAC-15D Failure to completely fill the above items with correct number and description will result in delayed or even undelivered replacement.
NOTE: The parts marked # are new. (initial parts)
CASING G2357116 G2017620 G2017621 G2017148 G2357118 G2017180 G2217171 G2217170 G2187541 G2187540 H5029851 G2217172 PEDAL PLATE BATTERY CASE BATTERY COVER BOTTOM COVER BOTTOM FOOT CASE LED PANEL PANEL PEDAL R PEDAL L PEDAL SHAFT REAR PANEL 62X53 2 1 1 1 2 1 1 1 1 1 2 1
# # # # # #
"KNOB,BUTTON" G2477122 G247751001 G247751301
R-KNOB VGA KEYTOP S BLACK WITH LENS VGA KEYTOP S WITHOUT LENS
7 2 2
SWITCH 01780101 13129778 SKQKAB SKQKAH TACT SWITCH TACT SWITCH SW3, SW4, SW5, SW6 on PB SW1, SW2 on PB 4 2
JACK,EXT TERMINAL 13449150MF 13449155MF F3449415
HTJ-064-12D HTJ-064-12I KM02009AB
PHONE JACK (STEREO) PHONE JACK (MONO) ADAPTOR JACK
JK1, JK2, JK3 on JB JK4 on JB JK5 on JB
3 1 1
PWB ASSY # E 75D693P000 # 75D693M000
JACK PWB ASSY PANEL PWB ASSY
IC # #
#
02897545 F5209123 F5179604 02565501 F5179125 15289109 15189261 00346445 02451434
MN101C30AHD OD-20 VER1.00 S-80930ALMP-DAT-T2 CAT24WC02J TC220CCA0AF-B01(MR3) S-8520E33MC-BJS-T2 M5216FP-600D M5218AFP-600E NJM2100M(TE3) AK4552VT
IC(CPU 8BIT) IC (REST) IC (EEPROM) IC (DSP) IC (DC-DC) IC (BIPOLAR OP AMP) IC (BIPOLAR OP AMP) IC (BIPOLAR OP AMP) IC (AD/DA)
IC6 on JB IC7 on JB IC4 on JB IC5 on JB IC8 on JB IC10, IC11 on JB IC3 on JB IC1 on JB IC2 on JB
1 1 1 1 1 2 1 1 1
TRANSISTOR 00679045 15309104 15319108 00562012 15319107 F5139608 # F5329530 15329103
2SA1298-Y(TE85R) 2SA1586-GR(TE85R) 2SC-3324GR-TE85R 2SC3265-Y(TE85R) 2SC4116-GR(TE85R) IRF7606 2SK879Y 2SK880GR-TE85R
TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR POWER MOS FET FET TRANSISTOR FET TRANSISTOR
Q5 on JB Q4 on JB Q3, Q12 on JB Q7 on JB Q6, Q9, Q10 on JB Q11 on JB Q2, Q8 on JB Q1 on JB
1 1 2 1 3 1 2 1
DIODE 02562878 01019534 F5029126 02DZ5.1-Y(TPH3) 1SS355 TE-17 L-113GDT ZENER DIODE SWITCHING DIODE POWER LED D8 on JB D1, D4, D6, D10 on JB LED2 on PB 1 4 1
10
OD-20(T)
DIODE 1502928100 F5029117 15339119 00783034 15339120 F5339137 L-34HDSL L-312LRD 1SS-352 1SS294(TE85L) 1SS302 SS14 VF=0.45V LED (RED) LED DIODE DIODE DIODE DIODE LED3, 4, 5, 8, 9, 10, 11 on PB LED6, 7 on PB D2 on JB D3 on JB DA3 on JB D5, D7 on JB 7 2 1 1 1 2
RESISTOR # # F5419707 F5399951 F2569127 00566867 00567023 00567156 00567289 00567412 00567556 00567290 00567301 00567190 00567334 00566934 00567089 00567367 00567245 00567378 00567501 00567134 F3829270 F5429365 F5429386 F5419740 F5419741 CRN34101J 68(1/2W) CHIP MINISMDC075 RPC05T 100 J RPC05T 101 J RPC05T 102 J RPC05T 103 J RPC05T 104 J RPC05T 105 J RPC05T 123 J RPC05T 153 J RPC05T 222 J RPC05T 273 J RPC05T 330 J RPC05T 331 J RPC05T 393 J RPC05T 472 J RPC05T 473 J RPC05T 474 J RPC05T 681 J 27(2W) 10K OHM F RANK (1%) 150K F (1608TYPE) CRN34473J CHIP CRN34681J CHIP RESISTOR ARRAY RESISTOR (1/2W) POLY SWITCH MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR METAL OXIDE RESISTOR CHIP RESISTOR CHIP RESISTOR ARRAY RESISTOR ARRAY RESISTOR RA5,6 on JB R64, R68 on JB R48 on JB R37, R76, R77, R79 on JB R51 on JB R6, R61 on JB R1, R7, R11, R12, R13, R14, R15, R17, R19, R10, R28, R45, R67, R75, R78, R82, R83, R86 R2, R3, R5, R27, R29, R44, R60 on JB R25, R34 on JB R23, R36 on JB R57 on JB R59 on JB R54 on JB R62, R69, R82 on JB R30 on JB R9, R66, R88 on JB R8, R16, R21, R26, R31, R41, R47, R52, R53, R4, R74 on JB R72 on JB R18, 22 on JB R24 on JB R20 on JB RA4 on JB RA2,3 on JB 2 2 1 4 1 2 25 12 7 12 2 1 1 1 3 1 3 11 2 1 2 1 1 1 2
#
# #
POTENTIOMETER # F3279819 F3279802 F3279803
RD901-40-125F-B54-0CD 50KB RD901-40-125F-B54-00D RD901-40-125F-B54-11D
ROTARY POT. W/CENTER CLICK POTENTIOMETERNO CLICK 50KB POTENTIOMETER 11 CLICKS 50KB
VR2 on PB VR1, VR3, VR4, VR5, VR6 on PB VR7 on PB
1 5 1
CAPACITOR 02341489 # # # # # # # # # # # # # F5349704 F5359732 F5359780 F5359382 F5359740 F5359812 F5359372 F5359720 F5359803 F5359370 F5359704 F5359373 F5359800 F3629692 F3629695TS F3629678TS 13629550KM 13629509KM ECPU1C474MA5 ECPU1C474MA5 GRM39B102J50PT GRM39B103K50PT GRM39B182J50PT GRM39B222K50PT GRM39B473J50PT GRM39B683J50PT GRM39CH101J50PT GRM39CH151J50PT GRM39CH180J50PT GRM39CH220J50PT GRM39CH271J50PT GRM39F104Z25PT 0.22/50V 1/50V 10/16V 100/16V 47/16V MYLAR CAPACITOR(SUBMICRON) MYLAR CAPACITOR (SUBMICRON) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CHIP CAPACITOR (1608 TYPE) CAPACITOR CAPACITOR CAPACITOR CAPACITOR CAPACITOR 1 C1 on JB C80 on JB C55, C56, C57, C58, C59, C60, C61, C72 on J C89, C95 on JB C5, C9 on JB C17, C33 on JB C67 on JB C6 on JB C83, C85, C88, C90 on JB C69 on JB C68, C70, C71 on JB C12, C13, C22 on JB C11, C21, C24, C26, C30, C32, C35, C36, C37 C87 on JB C2, C3, C19, C29, C91, C94 on JB C4, C7, C8, C10, C14, C15, C16, C18, C20, C C31, C49, C52, C54, C76, C78, C81, C86, C92 C34, C74 on JB 1 1 8 2 2 2 1 1 4 1 3 3 30 1 6 14 9 2
INDUCTOR,COIL,FILTER F2449216 02563478 F2449210
SLF7045T-151MR40 NFM4516P13C204F SLF7032T-4R7M1R7-2(4.7UH)
SMD COIL EMI FILTER COIL
L3 on JB C48 on JB L2 on JB
1 1 1
CRYSTAL,RESONATOR 02673278 F5299108
CX-49G 11.2896MHZ HC-49SM 8MHZ
CRYSTAL CRYSTAL
X2 on JB X1 on JB
1 1
CONNECTOR F3439160 F3439165 # F3439200
53015-0210 2P P=2MM A2001WR2-10P A2001WR2-15P
CONNECTOR CONNECTOR CONNECTOR
CN4 on JB CN1 on JB CN2 on JB
1 1 1
11
Apr.2002
WIRING,CABLE G3487163 # G3467251 # G3487421 G3477146
WIRING BATTERY WIRING 15P WIRING 10P RIBBON CABLE
L=80MM 2P L=52MM P=2MM L=40MM P=2MM 3P L=40X5X5 MM P=2MM
CN2 on PB CN1 on PB CN3 on JB
1 1 1 1
SCREWS H5019110 H5029115 H5039205 H5029852 H5029855 H5039510 H5039413 H5039414 H5019430 H5039521 H5039112 SCREW M3X6 SCREW 3X8 WASHER 12.5X9.5X0.5/0.9 SCREW 4M3 FEBZC SCREW M4X8 NUT M9X12X2 NYLON WASHER M4.1X7.5X0.5 NYLON WASHER M5.1X9.5X0.5 SCREW M2.6X5 VR ACCESSORY NUT M7 WASHER M9 PAN TAPPING-2 FEZC PAN TAPPING-2 FEBZC INTERNAL TOOTH FENI HEXAGON SOCKET BUTTON HEAD HEXAGON BUTTON HEAD FENI BLACK BLACK BINDING HEAD TAPTITE FEZC 10 7 4 2 4 4 2 2 2 7 4
#
PACKING #
G2627250 G2607212 G2237614 G2237613
PACKING CASE PACKING CASE LOWER REAR PAD SIDE PAD
1 1 1 1
MISCELLANEOUS G2357115 H2369427 2215770201 2217710900 G2257130 G2177308 G2177307 G2177309 G2357111 G2257129 # G2537552 G2197126
PEDAL FOOT LED SPACER PEDAL GUIDE BUSH COIL SPRING BATTERY INSULATING SHEET BATTERY TERMINAL(+) BATTERY TERMINAL(+-) BATTERY TERMINAL(-) CUSHION R INSULATING SHEET CENTER LABEL CAUTION LED GUIDE
M8 H=8MM 215-702 214-109
2 4 2 2 1 1 1 1 2 1 1 1
ACCESSORIES (Standard) # G6017350 # ******** # G6017351
OWNER'S MANUAL ALKALINE BATTERY OWNER'S MANUAL
JAPANESE LR6SG-P2 ENGLISH
1 3 1
12
OD-20(T)
CHECKING THE VERSION NUMBER
After you enter test mode, perform step 5. 1. 2. Turn all knobs to MIN (all the way to the left). While holding down the left pedal and the right pedal, insert the 9V plug into DC IN. At this time, only the POWER LED will light. 3. 4. Release the left and right pedals. The EFFECT ON/OFF LED will blink. Within four seconds, press the left pedal and then the right pedal. If you were successful in entering test mode, the EFFECT ON/OFF LED, MANUAL LED, and MEMORY LED will light. 5. Set the TYPE volume to METAL/LOUD. . The version number will be indicated as follows. For Ver1.00, only the MEMORY 2 LED will light. (The integer portion is indicated by the MEMORY 1 and 2 LEDs 1: MEMORY 1 LED: dark MEMORY 2 LED: lit 2: MEMORY 1 LED: lit MEMORY 2 LED: dark 3: MEMORY 1 LED: lit MEMORY 2 LED: lit The first decimal place is indicated by the MEMORY 3 and 4 LEDs 0: MEMORY 3 LED: dark MEMORY 4 LED: dark 1: MEMORY 3 LED: dark MEMORY 4 LED: lit 2: MEMORY 3 LED: lit MEMORY 4 LED: dark 3: MEMORY 3 LED: lit MEMORY 4 LED: lit The second decimal place is indicated by the MANUAL LED and MEMORY LED 0: MANUAL LED: dark 1: MANUAL LED: dark MEMORY LED: dark MEMORY LED: lit
TEST MODE
Required items
1. Oscillator 2. Noise meter 3. Oscilloscope 4. Monitor amp (e.g., MA-12) 5. Guitar amp (with a channel-switching jack) 6. Stereo plug 7. 47k short plug
1. How to enter test mode
1. 2. Turn all knobs to MIN (all the way to the left). Connect a short plug (47k) to INPUT. While holding down the left pedal and right pedal, insert the 9V plug into DC IN. At this time, only the POWER LED will light. 3. 4. Release the left and right pedals. The EFFECT ON/OFF LED will blink. Within four seconds, press the left pedal and then the right pedal. If you were successful in entering test mode, the EFFECT ON/OFF LED, MANUAL LED, and MEMORY LED will light.
2. List of test items
1. IC check 2. Switching noise / shock noise check 3. Residual noise check
2: MANUAL LED: lit MEMORY LED: dark 3: MANUAL LED: lit MEMORY LED: lit )
RESTORING THE FACTORY SETTINGS
Returning Settings to Their Factory Defaults You can restore the memories (1-4), pedal mode settings, and the MEMORY Number Indication to their original factory values. Memory Settings Memory 1 Memory 2 Memory 3 Memory 4 Pedal Mode LOUD LEAD OD-1 STACK
4. SW and LED check 5. AMP control check 6. VR Check 7. DAC check (includes FET SW (EFFECT) inspection) 8. DSP thru check 9. Analog mute check (FET SW (DIRECT) inspection) 10. Version check
1 (MANUAL -> MEMORY 1 -> MEMORY 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 currently stored in the memories (1-4). 1. 2. Switch off the power. Disconnect the connection plug from the INPUT jack. While holding down the WRITE button, switch on the power. Insert the connection plug into the INPUT jack. When you release the button, the MEMORY Number indicators blink. 3. Press the MEMORY WRITE button. After the MEMORY Number indicators begin blinking rapidly, the setting is stored in memory and the unit returns to its ordinary state. * To cancel the setting change, operate the EFFECT ON/OFF pedal or the MANUAL/MEMORY pedal before pressing the MEMORY WRITE button. The unit will return to its ordinary state.
13
Apr.2002
3. Test contents
1. IC check
1. 2. 3. When you enter test mode, the DSP(IC5) and EEPROM(IC4) check will begin automatically. If no problem is found, the EFFECT ON/OFF LED, MANUAL LED, and MEMORY LED will light. If a problem is found, the LEDs will indicate the problem as follows. ON/OFF LED blinking: EEPROM error MANUAL LED blinking: DSP(PRAM) error MEMORY LED blinking: DSP(IRAM) error If a problem is found, the unit will remain in this state, and it will not be possible to carry out the remaining tests. 7. 8. 9. 6. 2. 3. 4. 5.
Press the switches in the following order, and verify that in a similar way, only one LED at a time is lit. Press the AMP CTRL switch, and verify that only the AMP CTRL LED is lit. Press the MEMORY WRITE switch, and verify that only the EFFECT ON/OFF LED is lit. Press the MEMORY WRITE switch, and verify that only the MANUAL LED is lit. Press the MEMORY WRITE switch, and verify that only the MEMORY LED is lit. Press the MEMORY SELECT switch, and verify that only the MEMORY 1 LED is lit. Press the MEMORY SELECT switch, and verify that only the MEMORY 2 LED is lit. Press the MEMORY SELECT switch, and verify that only the MEMORY 3 LED is lit. Press the MEMORY SELECT switch, and verify that only the MEMORY 4 LED is lit. (It is not possible to proceed to other test items before you have finished the above procedure.)
2. Switching noise / shock noise check
1. 2. 3. With the EFFECT ON/OFF LED, MANUAL LED, and MEMORY LED lit, connect a short plug (47k) to INPUT, and a monitor speaker to OUTPUT. Press the EFFECT ON/OFF switch several times, and verify that no abnormal switching noise occurs. Press the EFFECT ON/OFF switch to make the EFFECT ON/OFF LED go dark (ANALOG BYPASS), and drop the unit from a height of approximately 10 cm to subject it to physical shock. Verify that no abnormal noise occurs. Press the EFFECT ON/OFF switch to make the EFFECT ON/OFF LED light (DSP THRU), and drop the unit from a height of approximately 10 cm to subject it to physical shock. Verify that no abnormal noise occurs.
5. AMP control check
1. 2. Connect the AMP CTRL jack to the channel switching jack of the guitar amp. Verify that the guitar amp channel is switched each time you press the AMP CTRL SW.
4.
3. Residual noise check
1. 2. Connect a noise meter to the OUTPUT. Press the EFFECT ON/OFF switch to make the EFFECT ON/OFF LED light (DSP THRU), and measure the residual noise. Verify that the value detected by the noise meter is below -73 dBm (IHF-A). 3. Press the EFFECT ON/OFF switch to make the EFFECT ON/OFF LED go dark (BYPASS), and measure the residual noise. Verify that the value detected by the noise meter is below -104 dBm (IHF-A).
6. VR check
1. Turn the DRIVE volume from MIN to MAX, and verify that the MEMORY 1-4 LEDs are all dark when the volume is at MIN (the instant you begin turning the volume), and light correspondingly as you turn the volume, so that all LEDs are lit when you reach MAX. (Each VR you operate here must be left at the MAX position so that you will be able to proceed to the next test item.) In the same way, perform this test in the following order for the other VR's. 2. BOTTOM volume TONE volume LEVEL volume ATTACK SHAPE volume HEAVY OCTAVE volume With the TYPE volume turned all the way to the left, turn it toward the right one click at a time, and verify that the LEDs change as follows. (TABLE A)
4. SW and LED check
1. Press the VARIATION switch, and you will proceed to the switch and LED check. First verify that only the VARIATION LED is lit. The other LEDs will be dark.
3. 4. 5. 6. 7.
dark TYPE 0 (OD-2/OD-1) 1 (BD-2/DS-1) 2 (HM-2/MT-2) 3 (BOOST/LEAD) 4 (CRUNCH/STACK) 5 (METAL/LOUD) 6 (T-SCREAM/FULL-D) 7 (DST+/CENTA OD) 8 (GUV DS/P-RAT) 9 (R-MAN/MUFF FUZZ) 10 (FACE/OCT FUZZ) EFFECT MANUAL MEMORY VARI AMPCTRL MEM1 MEM2 MEM3
lit MEM4
(TABLE A)
14
OD-20(T)
7. DAC check
1. 2.
fig.1
9. Analog mute check
1. 2. 3.
fig.4
Set the TYPE volume to BD-2/DS-1. Connect an oscilloscope to OUTPUT, and check the output waveform (DSP oscillation).
Set the TYPE volume to BOOST/LEAD. Connect an oscillator to INPUT, and input a 344 Hz, 50 mVp-p sine wave. Connect an oscilloscope to OUTPUT, and check the output waveform.
(200mV/div, 1msec)
(20mV/div, 1msec)
3.
Press MEMORY SELECT. The MEMORY 4 LED will go dark, and the output signal will be muted. Verify that the signal is less than -67 dBm (IHF-A). Connect an oscilloscope to LINE OUT/PHONES, and check the L and R output waveform (DSP oscillation).
4.
Press MEMORY SELECT. The MEMORY 4 LED will go dark, and the output signal will be muted. Verify that its level is less than -77 dBm (IHF-A).
4.
fig.2
(200mV/div, 1msec)
5.
Press MEMORY SELECT. The MEMORY 4 LED go dark, 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. 2. 3.
fig.3
Set the TYPE volume to HM-2/MT-2. Connect an oscillator to INPUT, and input a 344 Hz, 50 mVp-p square wave. Connect an oscilloscope to OUTPUT, and check the output waveform.
(500mV/div, 1msec)
15
Apr.2002
OD-20(T)
BLOCK DIAGRAM
fig.block
OUTPUT INPUT
JK1
2 3 1
JK4 BUFFER Q1 BUFFER Q12 FET SW Q2 BUFFER Q3
2 3 1
LINEOUT/PHONES
PRE EMPHASI S AF/AD IC1 JK3 DE EMPHASIS IC2 AMP IC3 FET SW Q8 AMP,LPF IC11
2 3 1
CODEC TR SW Q9 TR SW Q6
AMP CTRL
TR SW Q4,Q5,Q7
2 3 1
EEPROM IC4
JK2
JACK BOARD
IC5 COMPARATOR IC10 DSP IC6 CPU
PANEL BOARD
CN1 VR1,VR2,VR3,VR4
3 1 2
-9V
2
CN1 X2 11.2896MHz
VR5,VR6,VR7 WIRING 10P
1 2
1
SW1,SW2,SW3 SW4,SW5,SW6
RESET IC7 CN2
DC IN
JK5
2 1 3
RIBON CABLE
3pin
A +9
CN2 FILTER Q10
LED1,LED2,LED3,LED4 LED5,LED6,LED7,LED8 WIRING 15P
1 2
CN5
CN3
LED9,LED10,LED11,LED12
D +3. 3
BATTERY
CN4
DC-DC CONVERTER Q11, IC8
1
2
X1 8MHz
16
17
Apr.2002
CIRCUIT BOARD(JACK)
Circuit_Jack-1.eps
Circuit_Jack-2.eps
18
OD-20(T)
CIRCUIT BOARD(PANEL)
Circuit_Panel.eps
19
Apr.2002
OD-20(T)
CIRCUIT DIAGRAM(JACK)
fig.jack
R6 1k + C101 N.I.U. + R1 10k C1 3 0.47S R5 1M R8 A R7 10k A + C7 10/16 0.0022 10k R16 47k R19 10k C10 10/16 C11 0.1 R24 A A A R33 10k 10k(F) 6 5 + 7 IC1B NJM2100M 4 R37 10 5 C23 10/16 C24 0.1 C25 10/16 C26 0.1 14 3 IC1C NJM2100M R48 miniSMDC075 A C84 0.1 C30 0.1 C29 1/50 A A D +3. 3 C34 47/16 C35 7 C36 C38 C40 3 2 1 3 2 1 C42 C44 C46 RIBON CABLE 2mm 3P 0.1 0.1 0.1 0.1 0.1 0.1 C37 C39 C41 C43 C45 C47 0.1 0.1 0.1 0.1 0.1 0.1 0.1 IC6 52 51 50 SW_SELECT 49 SW_WRITE 48 SW_AMP CTL SW_VARIATION 47 SW_MAN/MEM 46 45 SW_ON/OFF 44 43 42 41 40 39 38 37 LED_MANUAL LED_MEMORY LED_AMP_CTRL LED_VARIATION LED_4 LED_3 LED_2 LED_1 53 54 55 56 57 58 59 60 31 30 29 28 27 36 35 34 33 32 7 D C75 0.1 10 D 5 C74 IC5 TC220C120AF-006(MR3) 4 OUT 47/16 P77/A15 P76/A14 P75/A13 P74/A12 P73/A11 P72/A10 P71/A9 P70/A8 P67/A7 P66/A6 P65/A5 P64/A4 P63/A3 P62/A2 P61/A1 P60/A0 LED7/D7/P87 LED6/D6/P86 LED5/D5/P85 LED4/D4/P84 LED3/D3/P83 LED2/D2/P82 LED1/D1/P81 LED0/D0/P80 P24/IRQ4 P23/IRQ3 P22/IRQ2 P21/IRQ1/SENS P20/IRQ0 P54/A17 P53/A16 P52/CS P51/RE P50/WE VDD X0 VSS IC12 VDD DS GND NC 1 3 2 3 D C73 0.1 MN101C30A P14/TM4IO P13/TM3IO P12/TM2IO P11/TM1IO P10/TM0TO/RMOUT P06/BUZZER/DK P05/SBT1 P04/SBI1 P03/SBO1 P02/SBT0 P01/SBI0/RXD P00/SBO0/TXD AN7/PA7 AN6/PA6 AN5/PA5 AN4/PA4 AN3/PA3 AN2/PA2 AN1/PA1 AN0/PA0 VREF+ 26 25 24 23 22 20 19 18 17 16 15 14 5 4 3 2 1 64 63 62 6 C62 0.1 VREFMMOD P27/RST OSC2 61 13 21 8 C68 22p D 9 11 12 IC7 D D +3. 3 1 2 OUT VDD VSS NC 4 Cp 5 C72 0.01 D C70 22p X1 49US SMD1 8MHz D C63 10/16 R73 10k D 4 VSS WP SDA SCL 5 6 R51 CAT24WC02J 100 D +3. 3 8 IC4 VCC A0 A1 A2 1 2 3 R49 10k R50 10k LED_ON/OFF LED_MANUAL LED_MEMORY LED_AMP_CTRL LED_VARIATION LED_4 LED_3 LED_2 LED_1 A A D +3. 3 A C6 100p 2 3 + 1 C100 N.I.U. R20 150k(F) C15 10/16 2 LIN LOUT VA VD SDTO SDTI VCOM PDN VSS 13 LRCK BCLK MCLK 15 10 12 11 8 9 R40 10k + C18 10/16 C22 270p 1 IC2 AK4552VT DEM0 DEM1 ROUT 6 7 D 16 R34 12k R23 6 5 R36 15k + + IC3B M5218AFP + R30 39k 7 + R26 2 3 + 47k 1 IC3A M5218AFP C19 1/50 C14 10/16 R25 12k 15k C16 10/16 D +3. 3 C12 270p C13 270p + R27 1M R21 47k R31 47k 1 Q6 2SC4116GR A + D +3. 3 R44 1M R41 47k R47 47k 1 Q9 2SC4116GR A P04 P03 R70 10k D R72 4 3 2 1 4 3 2 1 RA2 RA3 680 5 6 7 8 5 6 7 8 LED_POWER 680 680 10 9 8 7 6 5 4 3 2 1 R45 100k R28 100k IC1A NJM2100M R101 10k Q1 2SK880GR 1 + Q12 2SC3324GR C2 1/50 R100 + + + R2 1M 2 HTJ-064-12D + + Q2 2SK879Y 1 R3 C3 1M 1/50 R4 470k 1 + R80 10k C95 0.0018 Q3 2SC3324GR C4 R82 100k R83 100k R10 100k A R84 10k C89 0.0018 R86 100k R87 100k 6 5 C88 150p A D +3. 3 R11 10k 1 Q4 2SA1586GR R15 10k 2 3 R81 + M5216FP R65 330 C85 150p R85 + M5216FP R69 330 C90 150p A 1 R13 10k R103 100k A 10k IC11B 7 A R102 100k 10k HTJ-064-12I IC11A 1 C81 100/16 R64 68(1/2W) A
OUTPUT
JK4 2 3 1
2
JK1
1
2
2 3 1
3
GUITAR INPUT
2
3
148/40us Pre-Emphasis
C5 R12
10k
C83 150p A
8
8
1 3
D1 1SS355
47k A + C8 10/16
+
2
R9 4.7k R66 4.7k A
10/16 + + R67 100k 0.22/50 C87
C102 N.I.U.
IC11C M5216FP
R14 10k
A R68 68(1/2W) HTJ-064-12D 2 3 1 JK3
4
IC3C M5218AFP A
4
A
R17 10k
C9 0.0022
C86 100/16
+ D +3. 3
RIN
1M 2 Q8 2SK879Y 1
3
R29 C17 0.047
2
PHONES/LINE
A
TO BATTERY
CN4 2 1 2 1 +
8
2
D4 1SS355
3
R35 10k
C20 10/16
C21 0.1
1 3
A
3
D +3. 3
2
2
D Q5 2SA1298Y D2 R18 27 (2W) 2 3 1 R22 27 (2W)
-
1SS352 D3 1SS294
JK2
53015-0210
4
3
HTJ-064-12D A
D
R46 10k
C31 100/16
C32 0.1
C33 0.047
R32 10k 1
3
DC IN
JK6 DJ-0711-020 2 1 3
2
Q7 2SC3265Y D
2
AMP CTRL
CN1 10 9 8 7 6 5 4 3 2 1
A2001WR2-10P
D
79 73 64 59 56 49 38 33 24 23 14 7
D
DC IN
JK5 KM02009_B 2 1 3 R54 33 CN3 3 2 1 3 2 1 3 2 1 3 2 1 D5 C48 NFM4516P13C204F SS14 Q10 3 2SC4116GR 2 C52 100/16 C53 0.1 D +3. 3 + D +3. 3
57 58 60 62 63 65 67 68 69 70 74 75 78 32 77 13 15 C54 100/16 D +3. 3 R59 R88 C64 0.1 C67 C66 D 0.1 0.068 10 16 27k 17 4.7k 18 19 20 21 9 8 55 D7 SS14 3 C78 100/16
DA0 AD0 BCK LRCK0 LRCK1 MCK DA1 AD1 DA2 AD2 DA3 AD3 TESTT TESTS TESTB TESTP VDD PLLBP PLLVAA PLLRO PLLLP PLLAGS PLLAGD VSS DIVS1 DIVS0 DIV
VDD VDD VDD VDD VDD VDD VDD VDD VDD VDD VDD VDD
CA4 CA3 CA2 CA1 CA0 CD7 CD6 CD5 CD4 CD3 CD2 CD1 CD0 RD CS WR INT1 INT0 DRQ SYI OSC OSCSEL XTI
44 45 46 47 48 27 28 29 30 34 35 36 37 50 51 53 41 40 39 76 1 3 D 6 R60 R61 1M 1k X2
CA4 CA3 CA2 CA1 CA0
D +3. 3
D RA4 47k R55 R56 47k 47k D +3. 3
P04 P03 LED_ON/OFF
1 1
TP1 TH RA5 1 2 3 4 1 2 3 4 RA6 100 8 7 6 5 8 7 6 5 100
D
5 6 7 8
TP2 TH
4 3 2 1
R52 47k
R53 47k
CN2 15 14 13 12 11 10 9 8 7 6 SW_SELECT 5 SW_WRITE 4 SW_AMP CTL SW_VARIATION 3 2 SW_MAN/MEM 1 SW_ON/OFF VR_OCTAVE VR_ATTACK VR_LEVEL VR_TONE VR_BOTTOM VR_DRIVE VR_TYPE 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
C49 100/16
C50 0.1
RIBON CABLE 2mm 3P
R57 2.2k C51 0.1
1
0.01
0.01
0.01
0.01
0.01
0.01 C60
A
C55
C56
C57
C58
C59
A L2 SLF7032T-4R7M1R7-2 (4.7uH) Q11 1 2 3 4 5 C76 100/16 1 2 4 C79 0.1 C80 0.001 S S S G IRF7606 8 D D D D 7 6 5 D +3. 3 L3 SLF7045T-151MR37-2(150uH)
D C69 18p C71 22p CA4 CA3 CA2 CA1 CA0
R58 10k
D
C61
D
0.01
D +3. 3
A2001WR2-15P
C65 10/16 D
D +3. 3
XTO RST DRST CTYPE
5 25 CX-49G 11.2896MHz 42 72 D D +3. 3
OSC1 X1
2
D6 1SS355
D +3. 3
D +3. 3
VIN ON/OFF VSS
EXT
VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS
1
R62 330
1
VOUT
IC8 S-8520E33MC-BJS-T2 C77 0.1
80 71 66 61 54 52 43 31 26 22 12 11 4 2
1
D9 N.I.U. D8 02DZ5.1Y
D D D
2
td=48ms
N.I.U.(S-80130ALMC-JAP-T2)
C91
1/50 R74 470k
D +3. 3
+
D10 1 2 1SS355 C92 100/16 1
DA3
1SS302 2
R76 10
1
IC10A +
R75 2 100k 3 R78
R77 10
3
M5216FP IC10C M5216FP 100k 6 D 5
8
+
C93 10/16
C94 D 1/50
R79 7 10
IC10B +
D D
M5216FP
20
4
2
S-80930CLMC
21
Apr.2002
OD-20(T)
CIRCUIT DIAGRAM(PANEL)
fig.panel-c
EFFECT ON/OFF
D +3. 3 1
MANUAL
D +3. 3 1
MEMORY
D +3. 3 1
AMP CTRL
1
VARIATION
D +3. 3 1
4
D +3. 3 1
3
D +3. 3 1
2
D +3. 3 1
1
D +3. 3 1 LED10 L-34HDSL LED11 L-34HDSL 2 D +3. 3 D C1 N.I.U. D
D +3. 3
LED3 L-34HDSL 2 2
LED4 L-34HDSL 2
LED5 L-34HDSL 2
LED6 L-312LRD 2
LED7 L-312LRD 2
LED8 L-34HDSL 2
LED9 L-34HDSL 2 VR7 RD901-40-125F-B54-11D
CN1 10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1 1 WIRRING 10P 2 D LED12 L-113GDT
D +3. 3
HEAVY OCTAVE
3 VR1 2 1
ATTACK SHAPE
3 VR2 2 1
LEVEL
3 VR3
TONE
3 VR4
BOTTOM
3 VR5
DRIVE
3 VR6 2 1
TYPE
D +3. 3 3 1
2 1
2 1
2 1
2
CN2 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
RD901-40-125F-B54-00D (50KB)
RD901-40-125F-B54-0CD (50KB)
RD901-40-125F-B54-00D (50KB)
RD901-40-125F-B54-00D (50KB)
RD901-40-125F-B54-00D (50KB)
RD901-40-125F-B54-00D (50KB)
(CENTER CLICK )
(50KB 11click
D
)
2
2
2
2
2
WIRRING 15P
SW1 1 1 SKQKAH
SW2 1 SKQKAH
SW3 1 SKQKAB
SW4 1 SKQKAB
SW5 1 D SKQKAB
2 SW6 SKQKAB D
D
D
D
D
EFFECT ON/OFF
MAN/MEM
VARIATION
AMP CTRL
WRITE
SELECT
22
23
Apr.2002
24