ME-50 Service Notes English - EL34 World
Transcript of ME-50 Service Notes English - EL34 World
SERVICE NOTES
Issued by RJA
Copyright © 2003 ROLAND CORPORATION
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) (AS)17058813E0
Feb.2003 ME-50
SPECIFICATIONS.............................................................2LOCATION OF CONTROLS ..........................................4LOCATION OF CONTROLS PARTS LIST ...................4EXPLODED VIEW ............................................................6EXPLODED VIEW PARTS LIST .....................................8PARTS LIST......................................................................10CHECKING THE VERSION NUMBER.......................13
RESTORING THE FACTORY SETTINGS...................13TEST MODE.....................................................................13BLOCK DIAGRAM.........................................................20CIRCUIT BOARD............................................................22CIRCUIT BOARD............................................................24CIRCUIT DIAGRAM......................................................26
TABLE OF CONTENTS
2
Feb.2003
SPECIFICATIONSME-50: Guitar Multiple Effects
AD Conversion24 bit + AF method (*)
DA Conversion24 bit
Sampling Frequency44.1 kHz
Patches30 (user)
EffectsTone Modify
Compressor
Overdrive/Distortion
Chorus
Phaser
Flanger
Harmonist
Tremolo
Pan
Vibrato
UNI-V
Rotary
Delay
Reverb
Noise Suppressor
(Effects for Expression Pedal)
Foot Volume
Wah
Resonance
Voice
Ring Modulator
Bend (+1 OCTAVE, -1 OCTAVE)
Nominal Input LevelINPUT: -10 dBu
AUX IN: -10 dBu
Input ImpedanceINPUT: 1 M ohms
AUX IN: 100 k ohms
Nominal Output Level-10 dBu
Output Impedance2 k ohms
Display7 segments, 1character LED
JacksINPUT jack
GUITAR AMP jacks L(MONO)/R
AUX IN jack (Stereo Mini type)
PHONES/LINE OUT jack
AC Adaptor jack
Power SupplyDC 9 V: Dry batteries (R6/LR6 (AA) type) x 6, AC Adaptor (PSA series: Optional)
Current Draw120 mA
* Expected battery life under continuous use:
Carbon: 3.5 hours
Alkaline: 12 hours
These figures will vary depending on the actual conditions of use.
Dimensions384 (W) x 225 (D) x 102 (H) mm
15-1/8 (W) x 8-7/8 (D) x 4-1/16 (H) inches
Weight3.15 kg / 7 lbs (including batteries)
AccessoriesOwner’s Manual ENGLISH :(#G6017362)
JAPANESE :(#G6017361)
Dry Batteries (Alkaline: LR6 (AA) type) x 6:(#********)
OptionsAC Adaptor: BOSS PSA series
Foot Switch: BOSS 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.
* AF method (Adaptive Focus method)This is a proprietary method from Roland that vastly improves the signal-to-noise (S/N) ratio of the A/D and D/A converters.
3
ME-50
5
Feb.2003 ME-50
LOCATION OF CONTROLS
fig.panel
1
2,4
3,4
15,6,18
2,4
3,4
1
7
8
9 10 11,4
13
12
1415,1617,18
19202122232425
26 27 28
29
LOCATION OF CONTROLS PARTS LIST
NO PART CODE PART NAME DESCRIPTION1 1502928100 LED (RED) L-34HDSL2 F3279803 POTENTIOMETER 11 CLICKS 50KB RD901-40-125F-B54-11D3 F3279802 POTENTIOMETERNO CLICK 50KB RD901-40-125F-B54-00D4 G2477122 R-KNOB5 F5029117 LED L-312LRD6 G247751001 VGA KEYTOP S BLACK WITH LENS7 G2027904 TOP COVER8 G2187193 BOTTOM COVER9 G2187602 SWITCH PEDAL10 G2227301 PEDAL ESCUTCHEON11 F3279804 POTENTIOMETER 6 CLICKS RD901-40-125F-B54-06D 50KB12 G2187547 VR PEDAL13 G2357125 PEDAL PLATE14 15029106 LED LD002VB
15 G2047001 7SEG COVER16 F5029408 LED A-601H17 G247751301 VGA KEYTOP S WITHOUT LENS18 F3129306 SWITCH SKQKAB19 G1147002 REAR PANEL20 13449155MF PHONE JACK (MONO) HTJ-064-12I21 13449440 JACK HSJ0857-01-21022 13449150MF PHONE JACK (STEREO) HTJ-064-12D23 F3159111 SLIDE SW SK22F0224 F3449717 JACK HEC2392-01-15025 F2367103 CORD HOOK26 G2217733 PEDAL LABEL (OD/DS)27 G2217734 PEDAL LABEL (MOD)28 G2217735 PEDAL LABEL (DELAY)29 F3279782 POTENTIOMETER RK11K1140(10K SPECIAL B-CURVE)
NO PART CODE PART NAME DESCRIPTION
6
Feb.2003
EXPLODED VIEW
fig.explo1
7
ME-50
fig.explo2
8
Feb.2003
EXPLODED VIEW PARTS LIST
[PARTS]
[SCREWS]
NO PART CODE PART NAME DESCRIPTION1 G2027904 TOP COVER2 G2187193 BOTTOM COVER3 G1147002 REAR PANEL4 G2047001 7SEG COVER5 G2187547 VR PEDAL6 G2187910 PEDAL HOLDER7 G2147119 BOLT HOLDER8 G2357125 PEDAL PLATE9 G2357122 REAR CUSHION10 G2357111 CUSHION R11 G2147806 STAY12 G2217733 PEDAL LABEL (OD/DS)13 G2217734 PEDAL LABEL (MOD)14 G2217735 PEDAL LABEL (DELAY)15 G2227301 PEDAL ESCUTCHEON16 G2187602 SWITCH PEDAL17 G2177103 SUPPORT SPRING18 G2357126 PEDAL FOOT H=7.619 G247751001 VGA KEYTOP S BLACK WITH LENS20 G247751301 VGA KEYTOP S WITHOUT LENS21 G2477122 R-KNOB22 F2367103 CORD HOOK23 G2357120 FOOT H=524 G2017617 BATTERY CASE25 G2027602 BATTERY COVER26 G2177304 BATTERY TERMINAL (+ -)27 G2177305 BATTERY TERMINAL (+)28 G2177306 BATTERY TERMINAL (-)29 75E013P000 MAIN SHEET ASSY30 F3467025 WIRING 2PMAIN SHEET ASSY includes the following parts. 31 ******** EXP BOARD ASSY
NO PART CODE PART NAME DESCRIPTIONa H5039521 VR ACCESSORY NUT M7b H5039520 M9 NUTc H5039126 M9 WASHERd H5039514 NUT M6 HSJ-0999-01-190e H5039121 WASHER 9.5X6.5 HSJ-0999-01-210f H5039510 NUT M9X12X2 FENIg H5039112 WASHER M9h H5029331 SCREW 3X8 BINDING S-TIGHT FEBCk H5029332 SCREW 3X6 BINDING S-TIGHT FEBZCm H5029308 SCREW 3X10 BINDING S-TIGHT FEBCn H5029330 SCREW M3X8 BINDING TAPTITE P BZCo H5019124 SCREW M3X6 PAN MACHINE W/SW+SMALL PW ZCp H5019130 SCREW M3X6 PAN MACHINE W/SW+PW ZCq H5029867 HEX BOLT M6X70 HALF THEREAD BZr H5039122 PLAIN WASHER 6X13X1 BZCs H5039515 NUT M6 U BZCt H5019154 SPRING WASHER 6X12X1u H5039111 PLAIN WASHER 3X8 ZC
9
ME-50
10
Feb.2003
PARTS LISTfig.part1e
CASING# G2047001 7SEG COVER 1 G2017617 BATTERY CASE 1 G2027602 BATTERY COVER 1# G2187193 BOTTOM COVER 1 G2227301 PEDAL ESCUTCHEON 3# G1147002 REAR PANEL 1 G2187602 SWITCH PEDAL 3# G2027904 TOP COVER 1# G2187547 VR PEDAL 1
CHASSIS# G2187910 PEDAL HOLDER # G2147806 STAY 1
KNOB,BUTTON G2357120 FOOT H=5 4# F2367103 CORD HOOK 1 G2477122 R-KNOB 20 G247751001 VGA KEYTOP S BLACK WITH LENS 1 G247751301 VGA KEYTOP S WITHOUT LENS 4
SWITCH 13129778 SKQKAH TACT SWITCH SW7,8,9 3# F3129306 SKQKAB SWITCH SW1,2,3,4,6 5# F3159111 SK22F02 SLIDE SW SW5 1
JACK,EXT TERMINAL 13449150MF HTJ-064-12D PHONE JACK (STEREO) JK6,4 2 13449155MF HTJ-064-12I PHONE JACK (MONO) JK1,2,3 3# F3449717 HEC2392-01-150 JACK JK7 1 13449440 HSJ0857-01-210 JACK JK5 1
PWB ASSY# 75E013P000 MAIN SHEET ASSY 1
IC 01672634 TC74HC4052AFT(EL) IC TTL IC4,7,10 3 15209102 M51957BFP IC (SYSTEM RESET) IC3 1# F5199110 S-81233SGY IC (REGURATOR) IC19 1# F5289101 NJM2100M 8P SOP IC (OP.AMP) IC2 1# 03123889 HD6433687 IC (MASK CPU) IC11 1# F5279309 BU2090F-E2 IC (LED DRIVER) IC16,17 2# F5179607 CAT24WC32J IC (EEPROM) IC15 1 02231767 RA0A-101 (TC223C080AF-101) IC (DSP) IC8 1# F5279520 LC32V4265T-25-TLM IC (DRAM) IC12 1# 03123901 LT1616 IC (DC-DC) IC14 1 15189261 M5218AFP-600E IC (BIPOLAR OP AMP) IC1,5,18 3 01125012 NJM4556AM IC (BIPOLAR OP AMP) IC6 1 02451434 AK4552VT IC (AD/DA) IC3 1
TRANSISTOR 15309104 2SA1586-GR(TE85R) TRANSISTOR Q6 1 15319107 2SC4116-GR(TE85R) TRANSISTOR Q9 1 15319115 2SC4213-A(TE85L) TRANSISTOR Q2,3,4,5 4 15329103 2SK880GR-TE85R FET TRANSISTOR Q1 1
SAFETY PRECAUTIONS:The parts marked have safety-related characteristics. Use only listed parts for replacement.
CONSIDERATION ON PARTS ORDRINGWhen ordering any parts listed in the parts list, please specify the following items in the order sheet.
QTY PART NUMBER DESCRIPTION MODEL NUMBEREx. 10 22575241 Sharp Key C-20/50
15 2247017300 Knob (orange) DAC-15DFailure 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)
11
ME-50
DIODE 1502928100 L-34HDSL LED (RED) LED2,3,6,79,10,11,12,13,14,15,16,17,19,20,21 16 15029106 LD002VB LED LED4,8 2# F5029408 A-601H LED LED5 1 F5029117 L-312LRD LED LED18 1 15339119 1SS-352 DIODE D1,3,5,6 4 F5339137 SS14 VF=0.45V DIODE D4,7 2
RESISTOR F5419707 CRN34101J RESISTOR ARRAY RA1,2,3,4,6 5 F5419705 CRN34103J RESISTOR ARRAY RA7,9 2 F5419726 CRN34473J RESISTOR ARRAY RA8,10,11 3 F5429366 15K OHM F RANK (1%) RESISTOR (CHIP) R79 1# F5399914 6.8KF RESISTOR R82 1 F5399951 68(1/2W) CHIP RESISTOR R39,52 2 F2569127 MINISMDC075 POLY SWITCH R80 1 00566867 RPC05T 100 J MTL.FILM RESISTOR R33,70 2 00567023 RPC05T 101 J MTL.FILM RESISTOR R20,61,100 3 00567156 RPC05T 102 J MTL.FILM RESISTOR R9,10,26,27 4 00567289 RPC05T 103 J MTL.FILM RESISTOR R1,2,5,6,7,13,16,21,22,28,29,35,36,38,42,46, 30 00567412 RPC05T 104 J MTL.FILM RESISTOR R12,63 18 00567556 RPC05T 105 J MTL.FILM RESISTOR R12,R63 2 00567167 RPC05T 122 J MTL.FILM RESISTOR R101 1 00567290 RPC05T 123 J MTL.FILM RESISTOR R86,89 2 00567301 RPC05T 153 J MTL.FILM RESISTOR R4 1 00567190 RPC05T 222 J MTL.FILM RESISTOR R85 1 00567078 RPC05T 271 J MTL.FILM RESISTOR R102,103,104,105,106,107,108,109 8 00567334 RPC05T 273 J MTL.FILM RESISTOR R95,99 2 00567089 RPC05T 331 J MTL.FILM RESISTOR R122 1 00567345 RPC05T 333 J MTL.FILM RESISTOR R3,11,23,77,78,81,84,87,88,138,139,141,145,1 2 00566967 RPC05T 470 J MTL.FILM RESISTOR R83,91 2 00567112 RPC05T 471 J MTL.FILM RESISTOR R94,112 2 00567245 RPC05T 472 J MTL.FILM RESISTOR R17,32,44,56,58,59,140,142 8 00567378 RPC05T 473 J MTL.FILM RESISTOR R15,31,37,40,41,45,47,48,51,54,55,60,129,133 14 00567256 RPC05T 562 J MTL.FILM RESISTOR R127,131 2 00567134 RPC05T 681 J MTL.FILM RESISTOR R92,93,110,111,113,114,115,116,117,118,119,
116
F5429365 10K OHM F RANK (1%) CHIP RESISTOR R24 1 F5429386 150K F (1608TYPE) CHIP RESISTOR R18 1
POTENTIOMETER F3279802 RD901-40-125F-B54-00D POTENTIOMETERNO CLICK 50KB VR3,4,6,7,8,10,11,12,13,14,15,18,19,20,21 15 F3279804 RD901-40-125F-B54-06D 50KB POTENTIOMETER 6 CLICKS VR2 1 F3279803 RD901-40-125F-B54-11D POTENTIOMETER 11 CLICKS 50KB VR5,9,16,17 4# F3279782 RK11K1140(10K SPECIAL B-CURVE POTENTIOMETER VR1 1
CAPACITOR F5349704 ECPU1C474MA5 0.47 MYLAR CAPACITOR (SUBMICRON) C4 1 F3629110 100U/16V (H=7MM) CHEMICAL CAPACITOR C5,28,39,54,76,85,107,108,111,113,117,119,12 19 F3629700 10U/16V (H=7MM) CHEMICAL CAPACITOR C2,9,10,11,12,16,19,20,22,23,24,25,31,42,49, 17 01674612 ECJ1VB1H103K CERAMIC CAPACITOR C116 1# 01674501 ECJ1VB1H182K CERAMIC CAPACITOR C37,53 2 01674512 ECJ1VB1H222K CERAMIC CAPACITOR C1,7,14 3 01674712 ECJ1VF1A105Z CERAMIC CAPACITOR C130 1 01674701 ECJ1VF1E104Z 0.1UF/16VK CERAMIC CAPACITOR C18,26,29,30,32,34,38,45,46,47,48,59,60,61,6 58 01674167 ECUV1H100DCV CERAMIC CAPACITOR C3,8,21,35,36,51,52,128,129 9 01674467 ECUV1H102JCV CERAMIC CAPACITOR C95 1 01674189 ECUV1H120JCV CERAMIC CAPACITOR C100,101 2 01674356 ECUV1H151JCV CERAMIC CAPACITOR C44,58 2# F3629708 0.22U/50 CAPACITOR C56,41 2# F3629701 1/50 CAPACITOR C33 1# F3629703 47/16 CAPACITOR C66 1
INDUCTOR,COIL,FILTER F5409131 QT04-60 EMI L1 1# F2449226 SLF7032T-100M 10UH COIL L3 1
CRYSTAL,RESONATOR F5299306 HC-49SM 10.000MHZ CRYSTAL X1 1 02672401 SG-8002JC 67.7376MHZ PC CRYSTAL X2 1
CONNECTOR F3439123 A2001WR2-3P CONNECTOR 3P CN2 1 F3439160 53015-0210 2P P=2MM CONNECTOR CN3 1
12
Feb.2003
WIRING,CABLE# F3467025 WIRING 2P 1# F3467024 WIRING 3P 1
SCREWS H5039111 WASHER D8D3T0.5 ZC 2# H5039515 NUT M6 U BZC 1 H5019124 SCREW M3X6 PAN MACHINE W/SW+SMALL PW ZC 8 H5019130 SCREW M3X6 PAN MACHINE W/SW+PW ZC 8# H5039121 WASHER 9.5X6.5 HSJ-0999-01-210 # H5039514 NUT M6 HSJ-0999-01-190 # H5029867 HEX BOLT M6X70 HALF THEREAD BZ 1 H5039510 NUT M9X12X2 FENI for Phones Jack 5# H5029330 SCREW M3X8 BINDING TAPTITE P BZC 6 H5029332 SCREW 3X6 BINDING S-TIGHT FEBZC 6 H5029308 SCREW 3X10 BINDING S-TIGHT FEBC 1 H5029331 SCREW 3X8 BINDING S-TIGHT FEBC 10# H5039122 PLAIN WASHER 6X13X1 BZC 1# H5019154 SPRING WASHER 6X12X1 1 G2147119 BOLT HOLDER 2 H5039520 M9 NUT with VR RK11K1140 1 H5039126 M9 WASHER 1 H5039521 VR ACCESSORY NUT M7 with VR RD901-40 20 H5039112 WASHER M9 for Phones Jack 5
PACKING# G2627753 PACKING CASE 1# G2267501 PAD L 1# G2267502 PAD R 1
MISCELLANEOUS# G2199505 LED SPACER LED-7A 15# G2199506 LED SPACER LED-15A 3# G2357126 PEDAL FOOT H=7.6 3# G2217733 PEDAL LABEL (OD/DS) 1# G2217734 PEDAL LABEL (MOD) 1# G2217735 PEDAL LABEL (DELAY) 1 G2177304 BATTERY TERMINAL (+ -) 2 G2177305 BATTERY TERMINAL (+) 1 G2177306 BATTERY TERMINAL (-) 1 G2357111 CUSHION R 1 G2147127 DC JACK HOLDER 1# G2357125 PEDAL PLATE 1 G2357122 REAR CUSHION 2 G2177103 SUPPORT SPRING 3
ACCESSORIES (Standard)# G6017361 OWNER’S MANUAL JAPANESE # G6017362 OWNER’S MANUAL ENGLISH 1 40232389 WARRANTY CARD FOR BOSS JAPAN ONLY
13
ME-50
CHECKING THE VERSION NUMBER
• Device Settings
Turn the VR knobs (pots) completely to the left (minimum).
• Hold down the [EDIT/EXIT] switch and [WRITE] switch and turn the POWER switch on.
Press the [FOOT 1] switch.
If the version number is Ver.1.01, the “b” (flat symbol) LED lights up, and “1” appears in the seven-segment LED. fig.test-4_70
RESTORING THE FACTORY SETTINGS
• Hold down the [WRITE] switch and [ ] switch and turn the POWER switch on.
“F” appears in the seven-segment LED.
• Press the [WRITE] switch. The BANK LED flashes.
• Press the [WRITE] switch. The seven-segment LED and BANK LED flash, and the factory data is loaded.
The dot in the seven-segment portion lights, and Factory Reset is completed when the unit switches to Play mode.
Never turn off the power while factory data is being loaded.
TEST MODE
Items to Have On HandOscilloscope (1)
Oscillator (1)
Monitor amps (2)
Noise meters (2)
FS-5U (2)
Open plug
Measuring Equipment Settings
OscillatorWaveform: Rectangular wave
Frequency: 400 Hz
Output Level: 50 mVp-p
OscilloscopeTIME/DIV : 0.5 msec
VOLTS/DIV : 0.2 V
Noise MeterFilter: IHF-A (JIS-A)
Foot Switch (FS-5U)POLARITY SW: Jack
Switching into Test Mode• Device Settings
Turn all VR knobs (pots) completely to the left (minimum).fig.test-2_50
• Hold down the [EDIT/EXIT] switch and [WRITE] switch and turn the POWER switch on.
Test Categories1. LED Full Lighting, EEPROM Check
2. LED Lighting Check
3. Key SW, Pedal SW Check
4. External SW Check
5. VR Check
6. EXP Pedal Check
7. DSP Check
8. D/A Circuitry Check
9. DRAM Check
10. INPUT A/D Check, AUX IN Check, Noise Check
11. EXP Pedal Adjustment
Test DetailsSwitch to Test mode.
• Device Settings
Turn all VR knobs (pots) completely to the left (minimum).
• Hold down the [EDIT/EXIT] switch and [WRITE] switch and turn the POWER switch on.
1. LED Full Lighting, EEPROM Check• After the test is implemented, with data read from and written to the
EEPROM, all of the LEDs light up.
• Confirm the following.
1. All LEDS are lit.
2. No LED goes off when the unit is subjected to shock.
14
Feb.2003
fig.test-3_50
• With all LEDs lit, press the following switches to enable selection of the type of check to start.
Press the [FOOT 1] switch to proceed to the “Version Check.”
Press the [FOOT 2] switch to proceed to “5. VR Check.”
Press the [FOOT 3] switch to proceed to “6. EXP Pedal Check.”
Press the [ ] switch to proceed to “7. DSP Check.”
Press the [ ] switch to proceed to “11. EXP Pedal Adjustment.”
• Version Check
Press the [FOOT 1] switch.
If the version number is Ver.1.01, the “b” (flat symbol) LED lights up, and “1” appears in the seven-segment LED.
After confirming the version, press the [ ] switch to proceed to the LED lighting check.
2. LED Lighting Check• Confirm that the LEDs light up in sequence each the [WRITE] switch is
pressed.fig.test-5_50
Sequence in Which LEDs Light Up
[TONE MODIFY]→[COMPRESSOR]→[NS]→[REVERB]→([b]−>[#])
→[TUNER]→[MEMORY]
→[EACH SEGMENT OF 7-SEGMENT LED]→[PEDAL MODE SW]→[DELAY]→[MODULATION]
→[OVERDRIVE/DISTORTION VARIATION]→[FOOT 1]→[FOOT 2]→[FOOT 3]
→RETURN TO [TONE MODIFY]
• Press the [ ] switch to proceed to the next step.
Note: This will not advance the procedure to the next step unless the cycle has returned to [TONE MODIFY].
3. Key SW, Pedal SW Check• Press the following switches in the indicated sequence.
[WRITE]→[ ]→[EDIT/EXIT]→[ ]→[TYPE VARIATION]→[FOOT 1]→[FOOT 2]→[FOOT 3]
Note: If the incorrect key is pressed inadvertently, the procedure does not advance to the next key unless the correct key is pressed twice.
fig.test-6_50
If no problem exists, the procedure automatically proceeds to the next step.
4. External SW Check• Connect two FS-5U foot switches, one each to the [TONE MODIFY] and
[COMP ON/OFF] jacks.
Set the FS-5U POLARITY switches at the jacks.fig.test-7_70
• Press the [TONE MODIFY] switch (FOOT SW = TIP).
If no problem exists, then “2” appears in the seven-segment display.fig.test-8_70
• Press the [COMP ON/OFF] switch (FOOT SW = RING).
If no problem exists, the procedure automatically proceeds to the next step.
5. VR CheckThe dot in the seven-segment LED appears when the VR is not at the minimum position.fig.test-9_70
(1) Notched VR Check
• Rotate the following VRs (pots) in the indicated sequence.
[TONE MODIFY]→[OVERDRIVE/DISTORTION]→[MODULATION]→[DELAY]→[PEDAL MODE SW]
Note: The notched VRs turn in both directions (clockwise and counterclockwise).
Note: Confirm that what is displayed in the seven-segment LED changes with each notch position.
[TONE MODIFY], [OVERDRIVE/DISTORTION], [MODULATION], and [DELAY] = “0”--”A”
1 2 3 4 5 6 7 8 9
10
11
12131415161718
19
20
2 3 412
5 6 7 8 9
10
11
1320
1419
151618
17
1
875
6
12
34
15
ME-50
[PEDAL MODE SW] = “0”--”5”fig.test-10_50
(2) Non-Notched VR Check
• Rotate the following VRs (pots) in the indicated sequence.
[COMPRESSOR:SUSTAIN]→[COMPRESSOR:LEVEL]→[NS:THRESHOLD]→[REVERB]→[MASTER LEVEL]→[OVERDRIVE/DISTORTION:DRIVE]→[OVERDRIVE/DISTORTION:BOTTOM]→[OVERDRIVE/DISTORTION:TONE]→[OVERDRIVE/DISTORTION:LEVEL]→[MODULATION:RATE/KEY]→[MODULATION:DEPTH/HARMONY]→[MODULATION:E.LEVEL/RESONANCE]→[DELAY:TIME]→[DELAY:FEEDBACK]→[DELAY:E.LEVEL]
Note: Confirm that what is displayed in the seven-segment LED changes with each notch position.fig.test-11_70
fig.test-12_70
fig.test-13_70
fig.test-14_50
If no problem exists, the procedure automatically proceeds to the next step.
6. EXP Pedal Check• Start with the expression pedal in the depressed position.
• Carry out the following operations in the indicated sequence.fig.test-15_70
1. Raise the tip of the expression pedal until it is at its highest point.fig.test-16_70
2. Lower the tip of the expression pedal until it is approximately at the midpoint.fig.test-17_70
3. Once again, press down tip down completely so that the pedal is in the fully depressed position.fig.test-18_70
If no problem exists, the procedure automatically proceeds to the next step.
7. DSP Check• The DSP check is performed automatically.
If no problem exists, the procedure automatically proceeds to the next step.
8. D/A Circuitry Checkfig.test-19_70
• Oscilloscope Settings: Ch1: 0.2 V/div; Ch2: 0.2 V/div; TIME: 0.5 ms/div
• Connect the cable only to the OUTPUT L(MONO) jack, then confirm that the waveform output by OUTPUT L(MONO) changes accordingly, as shown in the figures below.
1
2
3 4 5
1 2 3 4 5
6 7 8 9 10 11 12 13 14 15
16
Feb.2003
[Mute Off]fig.test-20_50
[Mute On]fig.test-21_50
• Next, connect the cable to OUTPUT R, then confirm that the waveform output by OUTPUT R changes accordingly, as shown in the figures below.
[Mute Off]fig.test-22_50
[Mute On]fig.test-21_50
• Disconnect the cable from OUTPUT R, then confirm that the waveform output by OUTPUT L(MONO) changes accordingly, as shown in the figures below.
[Mute Off]fig.test-20_50
[Mute On]fig.test-21_50
Reconnect the cable to OUTPUT R, then confirm that the waveform output by OUTPUT changes accordingly, as shown in the figures below.
[Mute Off]• Confirm that the value for the waveform amplitude is between 380 and
540 (mVp-p).
17
ME-50
fig.test-22_50
[Mute On]fig.test-21_50
• Confirm that the LINE/PHONES waveform changes accordingly, as shown in the figures below.
• Confirm that the value for the waveform amplitude is between 600 and 850 (mVp-p).
[Mute Off]fig.test-23_50
[Mute On]fig.test-24_50
Press the [ ] switch to proceed to the next step.
9. DRAM Checkfig.test-25_70
• Oscilloscope Settings: Ch1: 0.2 V/div; Ch2: 0.2 V/div; TIME: 0.5 ms/div
• Connect the cable only to the OUTPUT L(MONO) jack, then confirm that the waveform from OUTPUT is smooth, as shown in the figure below.
• Confirm that the value for the waveform amplitude is between 330 and 470 (mVp-p).
fig.test-26_50
• Example of bad waveform: waveform is stepped
18
Feb.2003
fig.test-27_50
• Press the [ ] switch to proceed to the next step.
10. INPUT A/D Check, AUX IN Check, Noise Checkfig.test-28_70
(1) INPUT A/D Check
Input a rectangular wave to the INPUT jack only, then check the waveform from OUTPUT.
• INPUT Signal: 400-Hz, 50-mVp-p square wave
• Oscilloscope Settings: Ch1: 0.2 V/div; Ch2: 0.2 V/div; TIME: 0.5 ms/div
• Confirm that the value for the waveform amplitude is between 320 and 460 (mVp-p).
fig.test-29_50
(2) AUX IN Check
Input a rectangular wave to the AUX IN jack only, then check the waveform from OUTPUT.
• INPUT Signal: 400-Hz, 200-mVp-p square wave
• Oscilloscope Settings: Ch1: 0.2 V/div; Ch2: 0.2 V/div; TIME: 0.5 ms/div
• Confirm that the value for the waveform amplitude is between 400 and 560 (mVp-p) GUITAR/AMP Jack.
fig.test-30_50
• Confirm that the LINE/PHONES waveform amplitude is between 290 and 410 (mVp-p).
(3) INPUT-to-OUTPUT Noise Check
• Disconnect cable connected to INPUT and AUX IN.
• Listen to the noise and confirm the following.
1. Noise level is -83.0 dBm IHF-A (JIS-A) or lower (both L and R).
2. No abnormal sounds are mixed with the output sound.
3. No abnormal sounds occur when the unit is subjected to shock.
• Press the [ ] switch to proceed to the next step.
11. EXP Pedal Adjustmentfig.test-31_70
fig.test-32_70
• Raise the unit’s expression pedal completely, release the pedal, and press the [WRITE] switch.
19
ME-50
Note: Release the pedal when the pedal is fully raised, then press the [WRITE] switch.
If an error occurs, the green LED in the upper portion of the seven-segment LED display flashes.fig.test-33_70
• Press the unit’s expression pedal completely forward, release the pedal, and press the [WRITE] switch.
Note: Release the pedal when the pedal is pressed down completely, then press the [WRITE] switch.
If an error occurs, the green LED in the upper portion of the seven-segment LED display flashes.fig.test-34_70
• Press the [ ] or [ ] switch to select “5,” then press the [WRITE] switch.
• If no problem exists, the procedure automatically proceeds to Factory Reset.
Factory Reset“F” appears in the seven-segment LED.
• Press the [WRITE] switch. The BANK LED flashes.
• Press the [WRITE] switch. The seven-segment LED and BANK LED flash, and the factory data is loaded.
The dot in the seven-segment portion lights, and Factory Reset is completed when the unit switches to Play mode.
Never turn off the power while factory data is being loaded.
When the above is completed, the unit quits Test mode.
21
Feb.2003 ME-50
BLOCK DIAGRAM
fig.block
BUFFERQ1
Pre EmphLevel CTL
IC2 CODEC
(AD/DA)
IC3
DE EmphLevel CTL
IC1
BUFFER
IC18
INPUTOUTPUT R(MONO)
OUTPUT L
FILTER
IC5
MUTEQ2,3
BUFFER(NON INV)
IC6PHONES/LINE
DSPIC8
DRAMIC12
CPU
IC11
RESET
LED 2-4
LED 6-97 SEGLED
LED DRIVERIC16
LED 10-21LED DRIVER
IC17
MUTE CONTROLQ6
EEPROM IC
VR 18-21
VR 14-17
VR 10-13VR 6-9
VR 2-5
ANALOGMULTIPLEXER
IC4
ANALOGMULTIPLEXER
IC10
ANALOGMULTIPLEXER
IC7
EXP PEDAL
RIPPLEFILTER
Q9DC-DC
CONVERTERIC14
+3.3V
FOR ANALOG
+9.0V
AUX IN
CRYSTALOSCILLATOR
X2
SW1-4,6-9
CTL1,2
DC IN
VOLTAGEREGULATOR
IC19
FOR IC2, IC3
BATTERYCN3
MUTEQ4,5
SW5
JK 7
JK 1
JK 5
JK 6
JK 2
JK 3
JK 4
CRYSTALOSCILLATOR
X1
23
Feb.2003 ME-50
CIRCUIT BOARD
comp.eps
View from components side
25
Feb.2003 ME-50
CIRCUIT BOARD
foil.eps
View from foil side
27
Feb.2003 ME-50
CIRCUIT DIAGRAM
fig.main-cr
GUITAR INPUT
TO BATTERY
OUTPUT R
AUX IN
CTL 1,2
DC IN
OUTPUT L(MONO)
PHONES/LINE
7seg LED
144pin QFP
64pin QFP
DRAM
EXP PEDAL
RESET IC (Open Corector)
EXP BOARD
MAIN BOARD
(1Lot)HD6433687 (2Lot-)
LED4LED3LED2
DPGFEDCBA
LED6LED7LED8LED9
LED10LED11LED12LED13LED14LED15LED16LED17LED18LED19LED20LED21
LED
10
LED
11
LED
12
LED
13
LED
14
LED
15
LED
16
LED
17
LED
18
LED
19
LED
20
LED
21
LED
6
LED
7
LED
8
LED
9
A B C D E F G DP
A
+
+
A A
+
+
D
D
+D 3. 3
A
A
+ +
A
A
A
A
+D 3. 3
D
D
+D 3. 3
+D 3. 3
+D 3. 3
D
D
D
+D 3. 3
D
D
+D 3. 3
D
D
AA
D
+
A
D
A
D
D
D
+
D
A
D
D
+D 3. 3
+D 3. 3+D 3. 3
+ D3.3
A
A
D
D
D
D
+D 3. 3
D
D+D 3. 3+D 3. 3+D 3. 3
A
A
+
A
D
+D 3. 3+D 3. 3 +D 3. 3 +D 3. 3 +D 3. 3
+D 3. 3 +D 3. 3+D 3. 3+D 3. 3 +D 3. 3 +D 3. 3 +D 3. 3+D 3. 3+D 3. 3+D 3. 3 +D 3. 3+D 3. 3
+D 3. 3
D
D
+D 3. 3
+D 3. 3
D
D
+D 3. 3
D
+D 3. 3
+D 3. 3
+D 3. 3
D
+D 3. 3
D
+D 3. 3
D D
+D 3. 3
A
A
A
A
+
A
A
A
A
A
A
A A
D
D
D
D
A
AVCC
AVCC
AVCC
AVCC
AVCC
AVCC
D
+D 3. 3
+D 3. 3
D
D
D
D
AVCC
D
AVCC
DD
AVCC
D
D
+D 3. 3
+D 3. 3
+D 3. 3
+D 3. 3
+D 3. 3
+
+
+
D
+
++
+
+
+
A
D
A A
D
D
+ D3.3
+ D3.3
+ D3.3
+ D3.3A
D
A
D
A
D
A
D
A
A
A
+
A
D
D
+D 3. 3
+D 3. 3+D 3. 3
+
A
R8 27k
R210k
C10.0022
C5100/16
C6N.I.U.
R110k
+
-
IC1AM5218AFP
2
31
R25 27k
R2110k
C140.0022
+
-
IC1BM5218AFP
6
57
R1147k
C1210/16
R3310
C3110/16
R2410k(F)
R415k
C2210/16
C290.1
C32
N.I.U.
R710k
C2010/16
C910/16
C28100/16
C1910/16
C70.0022
+
-
IC2BNJM2100M
6
57
R610k
R9 1k
Q22SC4213A
1
23
Q42SC4213A
1
23
Q52SC4213A
1
23
RA9CRN34103J
1 82 73 64 5
RA7CRN34103J
1 82 73 64 5
C95
0.001
X2 SG-8002 (67.7376MHz)
OE1
GND2
OUT3
VDD4
R83
47
SW3SKQKAB1 2
SW4SKQKAB1 2
C10
50.
1
C10
60.
1
X1
49US SMD1 10MHz
C101 12pC100 12p
C74 0.1
C87 0.1
C1610/16
VR8RD901-40-125F-00D
1
2
3
VR10RD901-40-125F-00D
1
2
3
VR16RD901-40-125F-0DD(11detents)
1
2
3
RA2
CRN34101J
1 82 73 64 5
C71
0.1
JK1
HTJ-064-12I
1
24
VR6RD901-40-125F-00D
1
2
3
VR11RD901-40-125F-00D
1
2
3
VR13RD901-40-125F-00D
1
2
3
RA4
CRN34101J
1 82 73 64 5
C98
0.1
C91
0.1
C59
0.1
C17N.I.U.
VR14RD901-40-125F-00D
1
2
3
VR20RD901-40-125F-00D
1
2
3
C62
0.1
C70
0.1
R121M
C97
0.1
C4
0.47S
VR9RD901-40-125F-0DD(11detents)
1
2
3
VR18RD901-40-125F-00D
1
2
3
C90
0.1
VR17RD901-40-125F-0DD(11detents)
1
2
3
R1610k
VR7RD901-40-125F-00D
1
2
3
RA3
CRN34101J
1 82 73 64 5
VR12RD901-40-125F-00D
1
2
3
C93
0.1
IC10
TC74HC4052AF
3Y4
2Y2
1Y5
0Y1
3X11
2X15
1X14
0X12
YCOM3
XCOM13
INH6
B9
A10
VEE7
VCC16
GND8
IC7
TC74HC4052AF
3Y4
2Y2
1Y5
0Y1
3X11
2X15
1X14
0X12
YCOM3
XCOM13
INH6
B9
A10
VEE7
VCC16
GND8
C61
0.1
C69
0.1
Q12SK880GR
3
12
RA6
CRN34101J
1 82 73 64 5
C96
0.1
VR15RD901-40-125F-00D
1
2
3
VR21RD901-40-125F-00D
1
2
3
C99
0.1
VR19RD901-40-125F-00D
1
2
3
C92
0.1
R2210k
C60
0.1
C68
0.1
JK5
HSJ0857-01-1210
1
23
C42 10/16
C49 10/16
R91 47
RA8
CRN34473J
18
27
36
45
R97
10k
IC15
CAT24WC32J
A01
A12
A23
VSS4SDA
5
SCL6
WP7
VCC8
R96
10k C121
0.1
R100100
C45
0.1
C47
0.1
C46
0.1
VR3RD901-40-125F-00D
1
2
3
RA1
CRN34101J
1 82 73 64 5
VR4RD901-40-125F-00D
1
2
3
VR2RD901-40-125F-06D(6detents)
1
2
3
D1
1SS352
12
R63
1M
JK6
HTJ-064-12D
1
23
+
- IC6B
NJM4556
6
57
+
- IC6A
NJM4556
2
31
R38 10k
R50 10k
C35 10p
C51 10p
R564.7k
R584.7k C64
0.1
C650.1
CN2A2001WR2-3P
112233
CN1WIRING 3P
11 22 33
VR5RD901-40-125F-0DD(11detents)
1
2
3
C48
0.1
C18
0.1
R17
4.7k
R44 4.7k
R59 4.7k
IC8
TC223C080AF-101
1
2345
6
78910
1
1
121314
15
1617
1
8
192021
22
232425
2
6
2728
29
30
31
32333435
36
37
383940414243
44
454647484950
5
1
5253
54
55
565758
5
9
60616263
64
65666768697071
72
7
3
7475
76
777879
80
81828384
85
86878889
9
0
9192
9
3
94959697
98
99100
1
01
102103104105106107
108
1
09
110111112113114115
116
117
118119
1
20
121122123
124
125126127
1
28
129130
131
132133
134135
136
137138
139
1
40
141
142143
144
C76 100/16
SW2SKQKAB1 2
C8810/16
SW1SKQKAB1 2
SW8SKQKAH1 2
RA10CRN34473J
18
27
36
45
SW7SKQKAH1 2
SW6SKQKAB1 2
R94
470
LED4
L-34GDSL
12
R93
680
LED3
L-34HDSL
12
R92
680
LED2
L-34HDSL
12
IC16
BU2090F
Q04
Q15
Q26
Q37
Q48
Q59
Q1014
Q610
Q711
Q812
CK3
Q913
Q1115 DATA
2
VDD16
VSS1
C113100/16
CN353015-0210
11
22
Q9 2SC4116GR
1
23
C111100/16
R852.2k
C1120.1
C1100.1
LED6
L-34HDSL
12
R110
680
LED7
L-34HDSL
12
R111
680
LED8
L-34GDSL
12
R113
680
R112
470
LED9
L-34HDSL
12
R119
680
R116
680
LED21
L-34HDSL
12
LED12
L-34HDSL
12
R117
680
LED19
L-34HDSL
12
R114
680
LED13
L-34HDSL
12
R124
680
LED14
L-34HDSL
12
LED15
L-34HDSL
12
LED11
L-34HDSL
12
R120
680
R121
680
R125
680
LED17
L-34HDSL
12
R115
680
R123
680
LED16
L-34HDSL
12
LED20
L-34HDSL
12
R122
330
LED10
L-34HDSL
12
LED18
L-312LRD
12
R118
680
LED5A-601H
A7
B6
C3
D2
E1
F9
G8
DP
4
COM15
COM210
R102
270
R103
270
R104
270
R105
270
R106
270
R107
270
R108
270
R109
270
C107100/16
C85
100/16
SW5B
SK22F02
222123
SW5A
SK22F02
121113
R7915k(F)
R826.8k(F)
C10210/16
+
- IC6C
NJM4556
84
C117100/16
C1200.1
C1180.1
L2N.I.U.
R87 47kR88 47k
D31SS352
12
+
- IC1C
M5218AFP
84
R43N.I.U.
C39
100/16
C54
100/16
R45100k
R60100k
R39
68(1/2W)
R52
68(1/2W)
R26 1k
R32
4.7k
JK3HTJ-064-12I
1
24
Q32SC4213A
1
23
+
- IC5C
M5218AFP
84
C210/16
R10 1k
JK2HTJ-064-12I
1
24
C24
10/16
R27 1k
R15100k
R31100k
C11
10/16
IC17
BU2090F
Q04
Q15
Q26
Q37
Q48
Q59
Q1014
Q610
Q711
Q812
CK3
Q913
Q1115 DATA
2
VDD16
VSS1
RA11CRN34473J
18
27
36
45
JK4HTJ-064-12D
1
23
R1310k
R47100k
R48100k
Q62SA1586GR
1
32
R6210k
R61
100
R5 10k
CN4
N.I.U.
11
22
33
44
55
66
77
R101 1.2k
DA1N.I.U.
21
3
R80miniSMDC075
D51SS352
12
R8612k
R20100
R77 47k
C810p
R18 150k(F)
C15 N.I.U.
R3 47k
C3 10p
R23 47k
C21 10p
+
-IC9B
N.I.U.
6
57 +
-IC9A
N.I.U.
2
31
+
- IC9CN.I.U.
84
C127N.I.U.
C86N.I.U.
R72N.I.U.
C72 N.I.U.
R65 N.I.U.
R68 N.I.U.
R71N.I.U.
R73N.I.U.
R74N.I.U.
R69N.I.U.
C75 N.I.U.
R67 N.I.U.
R75N.I.U.
R76N.I.U.
R66
N.I.U.C73N.I.U.
Q8N.I.U.
1
23
LED1
N.I.U.
12
R64N.I.U.
Q7N.I.U.
12
D2 N.I.U.1 2
C1160.01
C119100/16
L3SLF7032T-100M(10uH)
R95 33k
R99 33k
IC14 LT1616
SHDN4
VIN5
GN
D2
BOOST1
SW6
FB
3
R78 47k
IC4
TC74HC4052AF
3Y4
2Y2
1Y5
0Y1
3X11
2X15
1X14
0X12
YCOM3
XCOM13
INH6
B9
A10
VEE7
VCC16
GND8
R81 47k
JK7HEC2392-01-150
2
13
45
IC12
LC32V4265T-25-TLM
VCC1
I/O12I/O23I/O34I/O45
VCC6
I/O57I/O68I/O79I/O810
NC13
NC14
WE15
RAS16
NC17
A018 A119 A220 A321
VCC22
VSS23
A424 A525 A626 A727 A828
OE29
UCAS30
LCAS31
NC32
I/O935I/O1036I/O1137I/O1238
VSS39
I/O1340I/O1441I/O1542I/O1643
VSS44
+
-
IC18AM5218AFP
2
31
+
-
IC18BM5218AFP
6
57
R1275.6k
R1315.6k
R126 10k
R12810k
R13210k
R129100k
R133100k
R130 10k
C129 10p
C128 10p
R57N.I.U.
R42 10k
R53 10k
R40100k
C56
0.22/50
C67N.I.U.
R3610k
C52 10p
+
- IC5A
M5218AFP
2
31
R51100k R54
100k
R4910k
C370.0018R37
100k
R35 10k
C530.0018
+
- IC5B
M5218AFP
6
57
R41100k
C36 10p
R55100k
C41
0.22/50
R46 10k
C44150p
R13410k
R135100k
R13610k R137
100k
+
-
IC18CM5218AFP
84
C10
10/16
C23
10/16
C126100/16
VR1ARK11K1140 (10KSB) 11
1213
4
L1QT0460
1
2
4
3D4SS14
1 2
D6 1SS35212
D7
SS14
12
IC13M51957BFP
RS
T6
DLY5
VCC7
GN
D4
NC1
NC3
IN2
NC8
R13847k
C115N.I.U.
C133N.I.U.
C134N.I.U.
C136N.I.U.
C135N.I.U.
C137N.I.U.
C138N.I.U.
DA21SS302
2 1
3
DA31SS302
2 1
3
L4
N.I.U.
L5
N.I.U.
C131N.I.U.
R1424.7k
R1404.7k
R13947k
R70
10
+
-
IC2ANJM2100M
2
31
R8912k
C114
0.1
R14147k
R2910k
C260.1
+
-
IC2CNJM2100M
84
C2510/16
R9810k
C82
0.1
C124
0.1
C77
0.1
C380.1
C630.1
C79
0.1
C940.1
C300.1
C125100/16
C78
0.1
C80
0.1
C83
0.1
C1301.0u
C122
0.1
C10
810
0/16
C1030.1
C890.1
C84
0.1
C10
40.
1
C1320.1
C81
0.1
C10
90.
1
C123100/16
C66
47/16
R9010k
C331/50
C50N.I.U.
C58150p
R84
47k
C340.1
C147 100/16
C150
100/16
C151
100/16
R143100k
R144100k
R2810k
IC19S-81233SGY
IN2
OUT3
GN
D1
C1480.1
C1490.1
C152100/16
C146N.I.U.
C139N.I.U.
C140N.I.U.
C141N.I.U.
C142N.I.U.
C143N.I.U.
C144N.I.U.
C145N.I.U.
R14647k
IC11
HD64F3687H
PB2/AN260 PB3/AN359
PB5/AN564
PB4/AN463
P1225
P11/PWM24
P10/TMOW23
P2347
P14/IRQ051
PB7/AN72
PB6/AN61
P3516
P71/RXD_249 P72/TXD_250
PB1/AN161
PB0/AN062
AV
CC
3
P2431
P75/TMCIV29
P76/TMOV30
P17/IRQ3/TRGV54
P16/IRQ253
P15/IRQ1/TMIB152
NMI35
P63/FTIOD032
P62/FTIOC033
P61/FTIOB034
P60/FTIOA036
P66/FTIOC139 P67/FTIOD140
P64/FTIOA137 P65/FTIOB138
P74/TMRIV28
TEST8
VC
L6
P20/SCK344 P21/RXD45 P22/TXD46
X15
OSC210
RES7
OSC111
X24
P3256
P70/SCK3_248
P8541
P3617
P8743
P3718
P3415
P3355
P3058 P3157
VC
C12
VS
S9
P8642
P52/WKP219P53/WKP320
P54/WKP421P55/WKP5/ADTRG22
P56/SDA26P57/SCL27
P51/WKP114
P50/WKP013
R14547k
IC20N.I.U.
IN2
OUT3
GN
D1
C153N.I.U.
C154N.I.U.
IC3 AK4552VT
LIN2
SDTO8
RIN1
VD5 MCLK
11BCLK12
PDN13
DEM17
VCOM14
LRCK10
VSS3
SDTI9
DEM06
VA4
ROUT16
LOUT15
SW9SKQKAH1 2
RESET
BCK
MCK
AD
DA
AD
BCKMCK
DA
LRCK
LRCK
RESET