Boss ME50 Schematic

Feb.2003

TABLE OF CONTENTS

SPECIFICATIONS.............................................................2

LOCATION OF CONTROLS ..........................................4

LOCATION OF CONTROLS PARTS LIST ................... 4

EXPLODED VIEW ............................................................ 6

EXPLODED VIEW PARTS LIST ..................................... 8

PARTS LIST......................................................................10

CHECKING THE VERSION NUMBER....................... 13

ME-50

SERVICE NOTES

Issued by RJA

RESTORING THE FACTORY SETTINGS...................13

TEST MODE..................................................................... 13

BLOCK DIAGRAM......................................................... 20

CIRCUIT BOARD............................................................22

CIRCUIT BOARD............................................................24

CIRCUIT DIAGRAM......................................................26

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

SPECIFICATIONS

ME-50: Guitar Multiple Effects

AD Conversion

24 bit + AF method (*)

DA Conversion

24 bit

Sampling Frequency

44.1 kHz

Patches

30 (user)

Effects

Tone 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)

Power Supply

DC 9 V: Dry batteries (R6/LR6 (AA) type) x 6, AC Adaptor (PSA series:
Optional)

Current Draw

120 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.

Dimensions

384 (W) x 225 (D) x 102 (H) mm

15-1/8 (W) x 8-7/8 (D) x 4-1/16 (H) inches

Weight

3.15 kg / 7 lbs (including batteries)

Accessories

Owner’s Manual ENGLISH :(#G6017362)

JAPANESE :(#G6017361)

Dry Batteries (Alkaline: LR6 (AA) type) x 6:(#********)

Options

AC 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-to­noise (S/N) ratio of the A/D and D/A converters.

Nominal Input Level

INPUT: -10 dBu

AUX IN: -10 dBu

Input Impedance

INPUT: 1 M ohms

AUX IN: 100 k ohms

Nominal Output Level

-10 dBu

Output Impedance

2 k ohms

Display

7 segments, 1character LED

Jacks

INPUT jack

GUITAR AMP jacks L(MONO)/R

AUX IN jack (Stereo Mini type)

PHONES/LINE OUT jack

AC Adaptor jack

2

ME-50

3

Feb.2003 ME-50

LOCATION OF CONTROLS

fig.panel

25

24

23

2122

20

19

2,4

3,4

5,6,18

2,4

3,4

1

17,18

15,16

14

13

1

12

29

1

7

8

26

9

10

LOCATION OF CONTROLS PARTS LIST

NO PART CODE PART NAME DESCRIPTION
1 1502928100 LED (RED) L-34HDSL
2 F3279803 POTENTIOMETER 11 CLICKS 50KB RD901-40-125F-B54-11D
3 F3279802 POTENTIOMETERNO CLICK 50KB RD901-40-125F-B54-00D
4 G2477122 R-KNOB
5 F5029117 LED L-312LRD
6 G247751001 VGA KEYTOP S BLACK WITH LENS
7 G2027904 TOP COVER
8 G2187193 BOTTOM COVER
9 G2187602 SWITCH PEDAL
10 G2227301 PEDAL ESCUTCHEON
11 F3279804 POTENTIOMETER 6 CLICKS RD901-40-125F-B54-06D 50KB
12 G2187547 VR PEDAL
13 G2357125 PEDAL PLATE
14 15029106 LED LD002VB

27

28

11,4

NO PART CODE PART NAME DESCRIPTION
15 G2047001 7SEG COVER
16 F5029408 LED A-601H
17 G247751301 VGA KEYTOP S WITHOUT LENS
18 F3129306 SWITCH SKQKAB
19 G1147002 REAR PANEL
20 13449155MF PHONE JACK (MONO) HTJ-064-12I
21 13449440 JACK HSJ0857-01-210
22 13449150MF PHONE JACK (STEREO) HTJ-064-12D
23 F3159111 SLIDE SW SK22F02
24 F3449717 JACK HEC2392-01-150
25 F2367103 CORD HOOK
26 G2217733 PEDAL LABEL (OD/DS)
27 G2217734 PEDAL LABEL (MOD)
28 G2217735 PEDAL LABEL (DELAY)
29 F3279782 POTENTIOMETER RK11K1140(10K SPECIAL B-CURVE)

5

Feb.2003

EXPLODED VIEW

fig.explo1

6

fig.explo2

ME-50

7

Feb.2003

EXPLODED VIEW PARTS LIST

[PARTS]

NO PART CODE PART NAME DESCRIPTION
1 G2027904 TOP COVER
2 G2187193 BOTTOM COVER
3 G1147002 REAR PANEL
4 G2047001 7SEG COVER
5 G2187547 VR PEDAL
6 G2187910 PEDAL HOLDER
7 G2147119 BOLT HOLDER
8 G2357125 PEDAL PLATE
9 G2357122 REAR CUSHION
10 G2357111 CUSHION R
11 G2147806 STAY
12 G2217733 PEDAL LABEL (OD/DS)
13 G2217734 PEDAL LABEL (MOD)
14 G2217735 PEDAL LABEL (DELAY)
15 G2227301 PEDAL ESCUTCHEON
16 G2187602 SWITCH PEDAL
17 G2177103 SUPPORT SPRING
18 G2357126 PEDAL FOOT H=7.6
19 G247751001 VGA KEYTOP S BLACK WITH LENS
20 G247751301 VGA KEYTOP S WITHOUT LENS
21 G2477122 R-KNOB
22 F2367103 CORD HOOK
23 G2357120 FOOT H=5
24 G2017617 BATTERY CASE
25 G2027602 BATTERY COVER
26 G2177304 BATTERY TERMINAL (+ -)
27 G2177305 BATTERY TERMINAL (+)
28 G2177306 BATTERY TERMINAL (-)
29 75E013P000 MAIN SHEET ASSY
30 F3467025 WIRING 2P
MAIN SHEET ASSY includes the following parts.
31 ******** EXP BOARD ASSY

[SCREWS]

NO PART CODE PART NAME DESCRIPTION
a H5039521 VR ACCESSORY NUT M7
b H5039520 M9 NUT
c H5039126 M9 WASHER
d H5039514 NUT M6 HSJ-0999-01-190
e H5039121 WASHER 9.5X6.5 HSJ-0999-01-210
f H5039510 NUT M9X12X2 FENI
g H5039112 WASHER M9
h H5029331 SCREW 3X8 BINDING S-TIGHT FEBC
k H5029332 SCREW 3X6 BINDING S-TIGHT FEBZC
m H5029308 SCREW 3X10 BINDING S-TIGHT FEBC
n H5029330 SCREW M3X8 BINDING TAPTITE P BZC
o H5019124 SCREW M3X6 PAN MACHINE W/SW+SMALL PW ZC
p H5019130 SCREW M3X6 PAN MACHINE W/SW+PW ZC
q H5029867 HEX BOLT M6X70 HALF THEREAD BZ
r H5039122 PLAIN WASHER 6X13X1 BZC
s H5039515 NUT M6 U BZC
t H5019154 SPRING WASHER 6X12X1
u H5039111 PLAIN WASHER 3X8 ZC

8

ME-50

9

Feb.2003

PARTS LIST

fig.part1e

SAFETY PRECAUTIONS:

The parts marked have
safety-related characteristics. Use
only listed parts for replacement.

NOTE: The parts marked # are new. (initial parts)

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
G247751301

CONSIDERATION ON PARTS ORDRING

When ordering any parts listed in the parts list, please specify the following items in the order sheet.

Failure to completely fill the above items with correct number and description will result in delayed or even
undelivered replacement.

VGA KEYTOP S BLACK WITH LENS

VGA KEYTOP S WITHOUT LENS

QTY PART NUMBER DESCRIPTION MODEL NUMBER

Ex. 10 22575241 Sharp Key C-20/50

15 2247017300 Knob (orange) DAC-15D

1
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

10

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
F3279804 RD901-40-125F-B54-06D 50KB POTENTIOMETER 6 CLICKS VR2 1
F3279803 RD901-40-125F-B54-11D
# F3279782

CAPACITOR

F5349704 ECPU1C474MA5 0.47
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

RK11K1140(10K SPECIAL B-CURVE

POTENTIOMETERNO CLICK 50KB

POTENTIOMETER 11 CLICKS 50KB

POTENTIOMETER VR1 1

MYLAR CAPACITOR (SUBMICRON)

VR3,4,6,7,8,10,11,12,13,14,15,18,19,20,21 15

VR5,9,16,17 4

C4 1

CONNECTOR

F3439123 A2001WR2-3P CONNECTOR 3P CN2 1
F3439160 53015-0210 2P P=2MM CONNECTOR CN3 1

11

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
H5019130 SCREW M3X6
# 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

PAN MACHINE W/SW+SMALL PW ZC

PAN MACHINE W/SW+PW ZC

8
8

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

12

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 Hand

Oscilloscope (1)

Oscillator (1)

Monitor amps (2)

Noise meters (2)

FS-5U (2)

Open plug

Measuring Equipment Settings

Oscillator

Waveform: Rectangular wave

Frequency: 400 Hz

Output Level: 50 mVp-p

Noise Meter

Filter: 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 Categories

1. 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 Details

Switch 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.

Oscilloscope

TIME/DIV : 0.5 msec

VOLTS/DIV : 0.2 V

13

Feb.2003

8

7

5

6

1

234

fig.test-3_50

20

19

1

2

3

18

16

17

14

15

4

6

9

7

8

5

10

11

13

12

• 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.

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

2. LED Lighting Check

• Confirm that the LEDs light up in sequence each the [WRITE] switch is
pressed.

fig.test-5_50

1

17

Sequence in Which LEDs Light Up

2

3

4

15

16

18

14

19

20

6

9

7

8

5

12

10

11

13

[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.

• 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 Check

The 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”

14

ME-50

[PEDAL MODE SW] = “0”--”5”

fig.test-10_50

1

2

3

4

5

(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

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

fig.test-12_70

fig.test-13_70

fig.test-14_50

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.

2

1

3

4

5

8. D/A Circuitry Check

fig.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.

7

6

10

9

8

11

12

13

15

14

15

Feb.2003

[Mute Off]

fig.test-20_50

[Mute On]

fig.test-21_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

• 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

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).

16

ME-50

fig.test-22_50

[Mute On]

fig.test-21_50

[Mute On]

fig.test-24_50

Press the [ ] switch to proceed to the next step.

9. DRAM Check

fig.test-25_70

• 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

• 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

17

Feb.2003

fig.test-27_50

• Press the [ ] switch to proceed to the next step.

10. INPUT A/D Check, AUX IN Check,
Noise Check

fig.test-28_70

fig.test-30_50

• Confirm that the LINE/PHONES waveform amplitude is between 290
and 410 (mVp-p).

(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.

(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 Adjustment

fig.test-31_70

fig.test-32_70

18

• Raise the unit’s expression pedal completely, release the pedal, and press
the [WRITE] switch.

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

ME-50

• 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.

19

Feb.2003 ME-50

BLOCK DIAGRAM

fig.block

JK 1

INPUT

JK 5

AUX IN

JK 6

CTL1,2

BUFFER

Q1

VR 2-5

VR 6-9
VR 10-13

VR 14-17

VR 18-21

Pre Emph

Level CTL

IC2

ANALOG

MULTIPLEXER

IC4

ANALOG

MULTIPLEXER

IC7

ANALOG

MULTIPLEXER

IC10

CODEC

(AD/DA)

IC3

DSP
IC8

DE Emph

Level CTL

IC1

CRYSTAL

OSCILLATOR

X2

DRAM

IC12

BUFFER

IC18

FILTER

IC5

MUTE

Q2,3

BUFFER

(NON INV)

IC6

MUTE

Q4,5

JK 2

OUTPUT R
(MONO)

JK 3

OUTPUT L

JK 4

PHONES/
LINE

JK 7

DC IN

EEPROM IC

EXP PEDAL

SW

1-4,6-9

BATTERY

CN3

SW5

+9.0V

VOLTAGE

REGULATOR

RIPPLE

FILTER

CONVERTER

FOR IC2, IC3

IC19

FOR ANALOG

Q9

DC-DC

IC14

+3.3V

CPU

IC11

RESET

MUTE CONTROL

Q6

CRYSTAL

OSCILLATOR

X1

LED DRIVER

IC16

LED DRIVER

IC17

LED

2-4

LED 6-9
LED

7 SEG

LED 10-21

21

Feb.2003 ME-50

CIRCUIT BOARD

comp.eps

View from components side

23

Feb.2003 ME-50

CIRCUIT BOARD

foil.eps

View from foil side

25

Feb.2003 ME-50

CIRCUIT DIAGRAM

fig.main-cr

EXP PEDAL

VR1A

RK11K1140 (10KSB)

MAIN BOARD

AVCC

VR2

RD901-40-125F-06D(6detents)

3

2

1

VR6

RD901-40-125F-00D

3

2

1

VR10

RD901-40-125F-00D

3

2

1

VR14

RD901-40-125F-00D

3

2

1

VR18

RD901-40-125F-00D

3

2

1

D

TO BATTERY

1

1

2

2

CN3
53015-0210

DC IN

4
5
1
3
2

JK7

HEC2392-01-150

+

D3.3

C139
N.I.U.

D

EXP BOARD

12134

11

VR4

RD901-40-125F-00D

3

2

1

VR3

RD901-40-125F-00D

VR8

RD901-40-125F-00D

3

2

1

VR7

RD901-40-125F-00D

VR12

RD901-40-125F-00D

3

2

1

VR11

RD901-40-125F-00D

RD901-40-125F-00D

RD901-40-125F-00D

A

R80
miniSMDC075

C131
N.I.U.

C140
N.I.U.

3

2

1

VR15

3

2

1

VR19

L1
QT046

124

0

C141
N.I.U.

VR16

RD901-40-125F-0DD(11detents)

VR20

RD901-40-125F-00D

3

C142
N.I.U.

3

3

2

2

1

1

CN1
WIRING 3P

3

2

1

VR5

RD901-40-125F-0DD(11detents)

3

2

1

VR9

RD901-40-125F-0DD(11detents)

3

2

1

VR13

RD901-40-125F-00D

3

2

1

VR17

RD901-40-125F-0DD(11detents)

3

2

1

VR21

RD901-40-125F-00D

1 2

D4

C132

SS14

0.1

C117
100/16

C143
N.I.U.

3

1

3

1

3

1

3

1

3

1

L2
N.I.U.

C144
N.I.U.

3
2
1

CN2
A2001WR2-3P

2

2

2

2

2

SW5A

11
13

SK22F02

SW5B

21
23

SK22F02

C118

0.1

+

k

IC13

84

R8 27

R25 27

R65

C72

1

N.I.U.

IN

IC6C

NJM4556

A

k

k

100

k

C41

0.22/50

R51

kR54

100

C56

0.22/50

D2 N.I.U.

1 2

N.I.U.

N.I.U.

IC9A

-

+

R73

D

N.I.U.

7

2

R2
10

kC10.0022

R3 47

C3

2

3

+

R21
10

k

R23 47

C21

6

5

+

+D+

R40
100

k

100

k

Q7

N.I.U.

R68

N.I.U.

2

3

AVCC

R74
N.I.U.

+

D3.

4

C103

0.1

2

D

X2 SG-8002 (67.7376MHz

+

D3.

C114

R89

k

12

0.1

R90

D

k

10

D

C127
N.I.U.

R126 10

k

10p

­1

+

IC1A

M5218AFP

C14

0.0022

k

10p

­7

+

IC1B

M5218AFP

R35

D3.

N.I.U.

OE

84

10k

C36

10p

IC5A

2

­1

3

+

C44

M5218AFP

150p

A

k

R46 10

10p

C52

IC5B

6

­7

5

+

C58

M5218AFP

150p

A

+

3

R64
N.I.U.

12

LED1

N.I.U.

1

2 3

D

Q8

+

D3.

3

1

R83

3

47

)

D

47

R91

+

3

D3.

IC9C
N.I.U.

D

R36
10k

C37

0.0018R37

R41
100k

R49

++

10k

C53

0.0018

R55
100k

+

3

D3.

1 2

R71
N.I.U.

D

3

VDD

OUT

GND

DA

3

AD

LRCK

BCK

MCK

AVCC

-

+

R127

5.6k

C133
N.I.U.

R128
10k

R131

5.6k

C134
N.I.U.

R132
10k

R42

10k

C135
N.I.U.

R134

+

10

k

k

R53 10

C136
N.I.U.

R136

k R137

10

+

37

73

109

1

11

26

51

90

81
82
83
84
86
87
88
89
91
92
94
95
96
97

99
100
102
103
104
105
106
107

74

75

77

78

79

65

66

67

68

69

70

71

D

30

118
119
121
122
123
125
126
127

129
130
132
133

134
135

137
138

139
141

76
131

31

101

6

15

22

29

36

44

55

64

72

+

84

-

+

IC18C
M5218AFP

A

k

C128

10p

2

­1

3

+

IC18A

M5218AFP

R129

+

100k

R130 10

k

10p

C129

6

­7

5

+

IC18B

M5218AFP

R133

+

100k

C35

10p

k

R38 10

IC6A

2

­1

3

+

NJM4556

R135

10p

100k

C51

k

R50 10

IC6B

6

­7

5

+

NJM4556

100k

+

D3.

3

IC8

18

59

93

120

128

140

63
62
61
60
58
57
56

52
53

54

110
111
112
113
114
115
117

142
143

28
27
25
24
23
21
20
19
17
16

50
49
48
47
46
45
43
42
41
40
39
38
35
34
33
32
10
9
8
7
5
4
3
2

12
13
14

TC223C080AF-101

80

85

98

108

116

124

136

144

144pin QFP

D

1k

C10

R9

10/16

R26

1k

C23

10/16

C39

100/16

R43
N.I.U.

C50
N.I.U.

A

C54

100/16

R57
N.I.U.

C67
N.I.U.

A

+

3

D3.

C77

0.1

D

D

C95

0.001

D

D

2SC4213A

2SC4213A

R39

68(1/2W)

R45
100k

A

R52

68(1/2W)

R60
100k

A

C78

0.1

IC12

28

A8

27

A7

26

A6

25

A5

24

A4

21

A3

20

A2

19

A1

18

A0

13

NC

14

NC

17

NC

32

NC

16

RAS

30

UCAS

31

LCAS

15

WE

29

OE

D

LC32V4265T-25-T

C11

10/16

R17

1

Q2

4.7k

2 3

A

C24

10/16

R32

Q3

1

4.7k

2 3

A

C150

100/16

4.7k

R44

1

Q4

2 3

2SC4213A

A

C151

100/16

4.7k

R59

1

Q5

2 3

2SC4213A

A

C81

C80

C79

0.1

0.1

0.1

1 8

43

I/O16

2 7

42

I/O15

3 6

41

I/O14

4 5

40

I/O13

1 8

38

I/O12

2 7

37

I/O11

3 6

36

I/O10

4 5

35

I/O9

10

I/O8

9

I/O7

8

I/O6

7

I/O5

5

I/O4

4

I/O3

3

I/O2

2

I/O1

+

D3.

22

VCC

6

VCC

1

VCC

0.1

0.1

44

VSS

C105

39

C104

VSS

23

VSS

LM

DRAM

1k

R10

R15
100

k

A

R27

1k

R31

k

100

A

R143
100k

A

R144
100k

A

C82

C83

0.1

0.1

+

3

D3.

RA7
CRN34103J

RA9
CRN34103J

3

0.1

C106

D

OUTPUT R

2
4
1

JK2
HTJ-064-12I

A

OUTPUT L
(MONO)

2
4
1

JK3
HTJ-064-12I

A

PHONES/LINE

2
3
1

JK4
HTJ-064-12D

A

C85

C84

100/16

0.1

+

3

D3.

C107
100/16

D

+

DA1
N.I.U.

OUT

R5 10

A

k

A

R113

680

C16
10/16

D3.

D3.

+

182736

+

45

A

3

3

k

R12
1M

C17
N.I.U.

AA

A

3

C149

0.1

C28

100/16

C137
N.I.U.

A A

A A

+

3

+

D3.

3

R139
47k

L4

N.I.U.

+

3

+

3

D3.

R141
47k

L5

N.I.U.

3

RA8

CRN34473J

3

RA10
CRN34473J

+

D3.

3

12

LED4

L-34GDSL

R94

470

DP
G
F
E
D
C
B

A
LED6
LED7
LED8
LED9

21

Q1
2SK880GR

1 2

R13
10k

A

R48
100k

DA2

D3.

1SS302

2 1

R140

4.7k

D3.

DA3
1SS302

2 1

R142

4.7k

4
5
6
7
8

9
10
11
12
13
14
15

NJM2100M

3

3

IC16

Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11

BU2090F

C29

0.1

IC2C

C9
10/16

84

-

+

C42

C49

C138
N.I.U.

D

R56

4.7k

D

R58

4.7k C64

VDD

VSS

DATA

CK

C7

0.0022

10/16

10/16

C65

0.1

D

0.1

D

182736

16

1

2
3

GUITAR INPUT

JK1

AVCC

3
2
1

D

C146
N.I.U.

D

12

C108

22

IC14

5

VIN

4

SHDN

GND

2

+

D3.

C145
N.I.U.

1 8
2 7
3 6
4 5

CRN34101J

1 8
2 7
3 6
4 5

1 8
2 7
3 6
4 5

1 8
2 7
3 6
4 5

1 8
2 7
3 6
4 5

100/16

BOOST

R98
10k

3

10

RA1

RA2

CRN34101J

RA3

CRN34101J

RA4

CRN34101J

RA6

CRN34101J

A

LT1616

5

R79
15k(F)

R82

6.8k(F)

C109

0.1

C116

0.01

1

6

SW

FB

R95 33

3

R99 33

7seg LED

COM2

COM1

A

7B6

R102

270

A

R20
100

C18

0.1

C45

C46

0.1

0.1

C59

C60

0.1

0.1

C69

C68

0.1

0.1

C91

C90

0.1

0.1

C96

C97

0.1

0.1

D3

1SS352

D D

C110

0.1
100/16

1SS352

D6

L3

SLF7032T-100M(10uH)

D7

SS14

k

1 2

k

C

3D2

R103

R104

270

270

B

C

+

IC20
N.I.U.

D3.

2

C153
N.I.U.

4
2
5

D

1
11
15
14
12

9
10

6

4

2

5

1
11
15
14
12

9
10

6

4

2

5

1
11
15
14
12

9
10

6

+

C112

0.1

A

+

3

C120

0.1

D

LED5
A-601

H

G

8DP4

R107

R108

270

270

F

G

DP

D

C48

C47

0.1

0.1

D

C62

C61

0.1

0.1

D

C71

C70

0.1

0.1

D

C93

C92

0.1

0.1

D

C99

C98

0.1

0.1

D

+

D3.

3

1 2

C102
10/16

2SC4116GR

Q9

23

C111

R85

1

100/16

2.2k

C113

12

C119
100/16

E

1F9

R105

R106

270

270

E

D

IN

1

IC4

3Y
2Y
1Y
0Y
3X
2X
1X
0X

B
A
INH

TC74HC4052AF

IC7

3Y
2Y
1Y
0Y
3X
2X
1X
0X

B
A
INH

TC74HC4052AF

IC10

3Y
2Y
1Y
0Y
3X
2X
1X
0X

B
A
INH

TC74HC4052AF

SW1
SKQKAB
1 2

SW6
SKQKAB
1 2

D

R109

270

3

OUT

C154

GND

N.I.U.

A

3

YCOM

13

XCOM

16

VCC

C38

0.1

8

GND

7

VEE

3

YCOM

13

XCOM

16

VCC

C63

0.1

8

GND

7

VEE

3

YCOM

13

XCOM

16

VCC

C94

0.1

8

GND

7

VEE

SW2
SKQKAB
1 2

SW7
SKQKAH
1 2

+

D3.

3

12

LED6

L-34HDSL

R110

680

LED6

HTJ-064-12I

+

C152
100/16

AVCC

D

AVCC

D

AVCC

D

SW3
SKQKAB
1 2

SW8
SKQKAH
1 2

D3.3

+

D3.3+D3.3+D3.3

12

LED7

L-34HDSL

R111

680

LED7

HSJ0857-01-1210

SW4
SKQKAB
1 2

SW9
SKQKAH
1 2

+

12

LED2

L-34HDSL

R92

680

12

LED8

L-34GDSL

LED8

2
4
1

IC19
S-81233SGY

2

IN

C148

0.1

AUX IN

JK5

CTL 1,2

JK6

HTJ-064-12D

R112

470

0.47S

A

R16
10k

R22
10k

D3.3

C4

1

2
3
1

2
3
1

+

12

LED3

L-34HDSL

12

LED9

+

GND

A

R47
100

45

182736

R93

680

LED9

L-34HDSL

R28
10k

R29
10k

D3.

C122

0.1

R11
47

k

C25
10/16

+

3

45

RA11
CRN34473J

D3.

R7
10k

D3.3

+

+

C123
100/16

D

R4
15

k

C8
10p

IC2A
NJM2100M

2

­1

3

+

C26

0.1

C73
N.I.U.

R138
47k

+

D3.

3

R146

R145

47k

k

47

R77

D3.

R33
10

D

D

D3.

+

R24
10k(F)

C30

0.1

C88
10/16

47k

+

R78 47k

+

D3.

3

R87
R88

R18

C15

6

5

C31
10/16

2SA1586GR

R61

100

R62

k

10

D

R66

N.I.U.

+

3

D3.

3

3

R81 47

LED4
LED3
LED2

47k
47k

64pin QFP

R100
100

3

R101

1.2k

C12
10/16

150k(F)

N.I.U.

­7

+

IC2B
NJM2100M

C32

N.I.U.

D

C33
1/50

+

D3.

3

12

Q6

1

3 2

AVCC

C89

0.1

D

2

PB7/AN7

1

PB6/AN6

64

PB5/AN5

63

PB4/AN4

59

PB3/AN3

60

PB2/AN2

61

PB1/AN1

62

PB0/AN0

54

P17/IRQ3/TRGV

53

P16/IRQ2

52

P15/IRQ1/TMIB1

51

P14/IRQ0

31

P24

47

P23

46

P22/TXD

45

P21/RXD

44

P20/SCK3

55

P33

56

P32

57

P31

58

P30

k

40

P67/FTIOD1

39

P66/FTIOC1

38

P65/FTIOB1

37

P64/FTIOA1

32

P63/FTIOD0

33

P62/FTIOC0

34

P61/FTIOB0

29

P75/TMCIV

30

P76/TMOV

28

P74/TMRIV

50

P72/TXD_2

49

P71/RXD_2

48

P70/SCK3_2

43

P87

42

P86

41

P85

D3.

R96

10

k C121

+

3

D3.

D

IC3

2

LIN

C20
10/16

1

RIN

4

VA

5

VD

C147

100/16

14

VCOM

3

VSS

C34

0.1

A

D1

1SS352

C66

47/16

D

R63

1M

A

+

D3.

C74

D

3

+

3

R97

10

k

CN4

1

1

2

2

3

3

4

4

5

5

6

6

7

7

N.I.U.

3

0.1
C76 100/16

C87

R70

10

6

12

VCL

VCC

AVCC

P11/PWM

P10/TMOW

P55/WKP5/ADTRG

P54/WKP4

P53/WKP3
P52/WKP2

P51/WKP1
P50/WKP0

P60/FTIOA0

P57/SCL

P56/SDA

OSC1

OSC2

TEST

RES

VSS

9

HD64F3687H
HD6433687 (2Lot-)

D

IC15

1

A0

VCC

2

A1

3

A2

WP

5

SDA

6

SCL

VSS

CAT24WC32

J

+ +

84

-

+

AK4552VT

P37
P36
P35
P34

P12

X1

X2

NMI

8

7

4

IC1C

M5218AFP

A

C2
10/16

0.1

D

IC11

24
23
22
21

20
19
18
17
16
15
14
13

36
27
26
25

49US SMD1 10MHz

11

10

5

4

8

35

7

(1Lot)

+

3

D3.

R1

k

10

+

R6

C5

10

100/16C6N.I.U.

k

A A

A

A

+

D3.

3

6

DEM0

7

DEM1

ROUT

LOUT

LRCK
BCLK
MCLK

SDTO

X1

SDTI

PDN

C19

D

10/16

16

C22
10/16

15

10

LRCK

12

BCK

11

MCK

8

AD

9

DA

13

RESET

R67

N.I.U.

C75

N.I.U.

IC9B

6

-

7

R69

5

+

N.I.U.

N.I.U.

AVCC

R76

R75

D

N.I.U.

N.I.U.

12p

C100

12p

C101

D

D

R84

D5

k

47

1SS352

D

1 2

1
3
8

5

C115

C130

N.I.U.

1.0u

D

RESET IC (Open Corector)

0.1

+

84

­IC5C

C126
100/16

+

M5218AFP

A

NC
NC
NC

DLY

RESET

C86
N.I.U.

R72
N.I.U.

D

+

D3.

3

R86
12

6

VCC

RST

GND

4

M51957BFP

-

+

D3.

+

12

LED10

3

LED10

L-34HDSL

R114

680

D3.3

12

LED11

+

LED11

L-34HDSL

R115

680

D3.3

+

12

LED12

LED12

L-34HDSL

R116

680

D3.3

12

LED13

+

LED13

L-34HDSL

R117

680

D3.3

+

12

LED14

LED14

L-34HDSL

R118

680

+

D3.3

D3.3+D3.3+D3.3

12

LED15

L-34HDSL

R119

680

LED15

+

12

LED16

LED16

L-34HDSL

R120

680

12

LED17

LED17

L-34HDSL

R121

680

12

LED18

LED18

L-312LRD

R122

330

D3.3

+

12

LED19

LED19

L-34HDSL

R123

680

D3.3

+

12

LED20

LED20

L-34HDSL

R124

680

D3.3

+

12

LED21

LED21

L-34HDSL

R125

680

LED10
LED11
LED12
LED13
LED14
LED15
LED16
LED17
LED18
LED19
LED20
LED21

IC17

4

Q0

5

Q1

6

Q2

7

Q3

8

Q4

9

Q5

10

Q6

11

Q7

12

Q8

13

Q9

14

Q10

15

Q11

BU2090F

+

D3.

3

16

VDD

C124

C125
100/16

0.1

1

VSS

DATA

D

2
3

CK

27