DG-Stomp
GUITAR PRE-AMPLIFIER WITH EFFECTS

SERVICE MANUAL

CONTENTS SPECIFICATIONS.. 3/4 PANEL LAYOUT. 5 BLOCK DIAGRAM.. 8 CIRCUIT BOARD LAYOUT.. 10 WIRING.. 11 DISASSEMBLY PROCEDURE.. 12 LSI PIN DESCRIPTION.. 15 IC BLOCK DIAGRAM.. 18 CIRCUIT BOARDS.. 20 TEST PROGRAM.. 28 ERROR MESSAGES.. 31 MIDI IMPLEMENTATION CHART... 32 PARTS LIST OVERALL CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper with soy ink.

GA 011537

20001001-39800

1.57K-786 I.T

HAMAMATSU, JAPAN

Printed in Japan 2000.09

IMPOR TANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.

WARNING :

Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative. This presentation or sale of this manual to any individual or firm does not constitute authorization certification, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.

IMPORTANT :

The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division.

WARNING : IMPORTANT :

Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus.) Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.

LITHIUM BATTERY HANDLING

This product uses a lithium battery for memory back-up. WARNING : Lithium batteries are dangerous because they can be exploded by improper handling. Observe the following precautions when handling or replacing lithium batteries. Leave lithium battery replacement to qualified service personnel. Always replace with batteries of the same type. When installing on the PC board by soldering, solder using the connection terminals provided on the battery cells. Never solder directly to the cells. Perform the soldering as quickly as possible. Never reverse the battery polarities when installing. Do not short the batteries. Do not attempt to recharge these batteries. Do not disasemble the batteries. Never heat batteries or throw them into fire.

ADVARSEL!

Lithiumbatteri-Eksplosionsfare ved fejlagtig handtering. Udskiftning ma kun ske med batteri af samme fabrikat og type. lever det brugte batteri tilbage til leverandren.

VARNING

Explosionsfara vid felaktigt batteribyte. Anvand samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera anvant batteri enligt fabrikantens instruktion.

VAROITUS

Paristo voi rajahtaa, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiiin. Havita kaytetty paristo valmistajan ohjeiden mukaisesti. The following information complies with Dutch official Gazette 1995. 45; ESSENTIALS OF ORDER ON THE COLLECTION OF BATTERIES. Please refer to the diassembly procedure for the removal of Back-up Battery. Leest u voor het verwijderen van de backup batterij deze beschrijving.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

WARNING

Components having special characteristics are marked originally installed. and must be replaced with parts having specification equal to those

SPECIFICATIONS

Digital Section
Full Digital Signal Processing 8 Channel Preamp Digital Effects Compressor Chorus, Flanger, Phaser, Rotary Speaker, Tremolo Digital Delay, Tape Echo Spring Reverb, Hall Reverb, Plate Reverb Tap Tempo Function (Delay Time) Speaker Simulator (16 Types) External Controller Function (EXP Pedal/MIDI):8 Controllers/ Parameters Wah Function Tuner Function (Chromatic, Auto)
Connections/Jacks INPUT: Standard Monaural Phone Jack OUTPUT L/MONO, R: Standard Monaural Phone Jack PHONES: Standard Stereo Phone Jack EXP. PEDAL: Standard Stereo Phone Jack DIGITAL OUT: COAXIAL MIDI IN, MIDI OUT: 5 pin DIN

A/D Converter

20 bit + 3 bit Floating

D/A Converter

20 bit
Sampling Frequency MIDI Functions
Receive: Program Change (Program Change Table can be created), Control Change, Bulk In Transmit: Program Change, Control Change, Bulk Out, Merge Out 48 kHz

Memory Allocations

Preset: 90 User: 90

Controller Switch

Top Panel Push Switch x17 UP, DOWN, MANUAL, UTILITY, STORE, COMP, CHORUS, FLANGER, PHASER, ROTARY, TREMOLO, DELAY, TAPE ECHO, SPRING, HALL, PLATE, SP. SIM Knob x15 AMP SELECT, GAIN, MASTER, TREBLE, MIDDLE, BASS, PRESENCE, COMP, SPEED, DEPTH, TIME, FEEDBACK, LEVEL, REVERB, OUTPUT Footswitch x4 1, 2, 3, BANK Rear panel STAND-BY ON/OFF, INPUT LOW/HIGH Display 7 Segment LED (3 digit) x1 Push Switch LED x17 Foot Switch LED x4
Input Level/Impedance (When using preamp bypass)
INPUT HIGH: -25dBm/1Mohm INPUT LOW: -15dBm/1Mohm

Output Level/Impedance

OUTPUT L/MONO, R: 0dBm/1kohm PHONES: 0dBm/47ohms (47ohms load)
Exclusive Power Adaptor (AC-10) AC Output: AC12V, 1000mA

Power Consumption

Dimensions (WxHxD)
280x70x184mm (11.0x2.8x7.2)

Weight

2.2kg (4lbs 14oz)

Accessories

Power Adaptor (AC-10) Owners Manual (this booklet)

PANEL LAYOUT

Top Panel
Display & Main Section

Effect Section

Amp Section

Foot Switch Section

e q w y r t
Up Button (UP) Down Button (DOWN) Manual Button (MANUAL) Utility Button (UTILITY) Store Button (STORE) Display

!2 u i o !0 !1

Amp Select Switch (LEAD1-CLEAN2) Gain Control (GAIN) Master Volume (MASTER) Tone Controls Output Level Control (OUTPUT) Speaker Simulator Button (SP. SIM)
Effect Section !3 !5 !8 @2
13 Compressor Button (COMP) 14 Compressor Knob (COMP) 15 Modulation Group Effect Buttons (CHORUS/FLANGER/PHASER/ROTARY/TREMOLO) 16 Speed Knob (SPEED) 17 Depth Knob (DEPTH) 18 Delay Group Effect Buttons(DELAY/TAPE ECHO) 19 Time Knob (TIME) 20 Feedback Knob (FEEDBACK) 21 Level Knob (LEVEL) 22 Reverb Group Effect Buttons(SPRING/HALL/PLATE) 23 Reverb Knob (REVERB)
Foot Switch Section @4 @5
24 Foot Switches 1, 2, Bank Switch (TAP/BANK/TUNER)

Rear Panel

Power Switch (STAND-BY ON/OFF) Power Adaptor Jack (AC IN 12V 700mA) MIDI OUT Jack MIDI IN Jack Digital Out Jack (DIGITAL OUT) EXP Pedal Jack (EXP. PEDAL) Headphones Jack (PHONES) Output Jacks (OUTPUT R, L/MONO) Input Jack (INPUT) Input Level Switch (LOW/HIGH)

BLOCK DIAGRAM

PN 1/2

IC2,IC3 IC9 IC8

IC10,IC11
AN0~AN3, SELECT-A, SELECT-B (DM-CN3)
PB0~PB7, SW-R0~R3 (DM-CN1) (PN-CN304)

(PN-CN302)

PN 2/2

IC308 IC309

84 LED-FOOT LED-REV LED-MOD SW-001, SW-010, SW-100, SW-LINE (DM-CN2) (PN-CN303) TXDO, RXDO CLD, CIN, CCK

18, 19, 20

IC112 IC113 IC114

KEC-54203

CIRCUIT BOARD LAYOUT

WIRING

V610850

V611470 V611450 V611460

Note) When installing the DM circuit board, use care not to have the wire assembly caught by the bottom case.

V611480

DISASSEMBLY PROCEDURE
Bottom Case Remove the six (6) screws marked [30]. The bottom case can then be removed. (Fig. 1)

Bottom

[30]: Bind Head Tapping Screw-B 3.0x8 MFZN2BL (EP600190)

2. 2-1. 2-2.

DM Circuit Board Remove the bottom case. (See Procedure 1.) Remove the four (4) screws marked [10c-a] and the five (5) special hexagonal nuts marked [10e] from the rear panel and the three (3) screws marked [10c-b] from the DM circuit board. The DM circuit board can then be removed. (Fig. 2)

[10c-a]

Hexagonal Nut

Topcover

Battery VN103500
VN103600(Battery holder for VN103500)
Notice for back-up battery removal Push the battery as shows in figure, then the battery will pop up.

[10c-b]

[10c]: Bind Head Tapping Screw-B 3.0x8 MFZN2BL (EP600190) [10e]: Hexagonal Nut 9.0 12x2 MFNI33 (LX200060)

3. 3-1. 3-2. 3-3-1.

PN Circuit Boards (1/2, 2/2) Remove the bottom case. (See Procedure 1.) Remove the DM circuit board. (See Procedure 2.) PN1/2 Circuit Board Remove the controls, knobs and special hexagonal nuts from the front panel, the three (3) screws marked [10j] and the shield film from the PN1/2 circuit board. The PN1/2 circuit board can then be removed. (Fig. 3) 3-3-2. PN2/2 Circuit Board Remove the four (4) special hexagonal nuts from foot switches. The PN 2/2 circuit board can then be removed. (Fig. 3)

shield film

[10j]:Bind Head Tapping Screw-P 3.0x12 MFZN2BL (VC161100)

4. 4-1.

Heat Sink Remove the two (2) screws marked [A-a] from the soldered face of the DM circuit board and the three (3) screws marked [A-b] from IC112, IC113 and IC114. The heat sink can then be removed from the DM circuit board. (Fig. 4)

Heat sink

IC114 IC113 IC112

LSI PIN DESCRIPTION

HD6413002FP16 (XQ375A00) CPU
PIN NO. NAME PA6 PA7 VCC PB0 PB1 PB2 PB3 PB4 PB5

PB6//DREQ0 PB7//DREQ1

DM: IC12
PIN NO. NAME A12 A13 A14 A15 A16 A17 A18 A19 VSS P60//WAIT P61//BREQ P62//BACK /STBY /RES NMI VSS EXTAL XTAL VCC /AS /RD /HWR /LWR MD0 MD1 MD2 AVCC VREF P70/AN0 P71/AN1 P72/AN2 P73/AN3 P74/AN4 P75/AN5 P76/AN6 P77/AN7 AVSS P80 P81//CS3 P82//CS2 P83//CS1 P84//CS0 VSS PA0 PA1 PA2 PA3 PA4 PA5 I/O O O O O O O O O I I I O I I I I O O O O O I I I I I I I I I I I I O O O O O I I I O O O FUNCTION
I/O O O I I I I I I I I O O O I I O I I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O O O O O O O O O O O O O
FUNCTION Port A Address bus Power supply

Address bus

Port B
Ground Port 6 out Stand-by mode signal Reset Non-maskable interrupt Ground Clock Clock Power supply Address strobe Read strobe Write strobe (High) Write strobe (Low) Mode select Analog power supply Reference voltage Analog data input (EQ) Analog input (EQ) Analog data input Analog input (CS) Analog data input (BEND) Analog input (MOD) Analog input (FC) Analog input (BAT) Analog ground Port 8 Chip select Ground

/RESO VSS P90/TXD0 P91/TXD1 P92/RXD0 P93/RXD1 P94/SCK0 P95/SCK1 P40/D0 P41/D1 P42/D2 P43/D3 VSS P44/D4 P45/D5 P46/D6 P47/D7 D8 D9 D10 D11 D12 D13 D14 D15 VCC A0 A1 A2 A3 A4 A5 A6 A7 VSS A8 A9 A10 A11
Reset Ground Transmit data (MIDI OUT) KSN-ACK Receive data (MIDI IN) KSN-RX Port 9 Port 9

(Ground)

Data bus

Power supply

Address bus (Ground)

Port A

YSS910-S (XV988A00) DSP6 (Digital Signal Processor)

PIN NO.

DM: IC8, IC9
Ground I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O
Vdd Vss XI XO Vdd /SYNCI /SYNCO Vdd CKI CKO CKSEL Vss MCKS /SSYNC /IC /TEST BTYP /IRQ TRIG Vdd Vss /CS /WR /RD CA7 CA6 CA5 CA4 CA3 CA2 CA1 Vss Vdd CD15 CD14 CD13 CD12 CD11 CD10 CD09 CD08 CD07 CD06 Vss Vdd Vdd CD05 CD04 CD03 CD02 CD01 CD00 /WAIT Vss SI0 SI1 SI2 SI3 SI4 SI5 SI6 SI7 Vss Vdd SO0 SO1 SO2 SO3 SO4 SO5 SO6 SO7 Vss DB00 DB01 DB02 DB03 DB04 DB05 DB06 DB07 DB08 DB09 DB10 DB11 DB12 Vdd Vdd

FUNCTION

Power supply (3.3 V) Ground System master clock input (60 MHz or 30 MHz) System master clock output (High or 30 MHz) Power supply (5 V) Sync. signal input Sync. signal output Power supply (5 V) System clock input (30 MHz) System clock output (30 MHz) System master clock select (0: 60 MHz, 1: 30 MHz) Ground Serial I/O master clock input (128 x Fs) Serial I/O Sync. signal output Initial clear Test mode setting (0: Test, 1: Normal) Data bus type select (0: 8 bit, 1: 16 bit) IRQ output Trigger signal input/output Power supply (5 V) Ground chip select signal input Write signal input Read signal input
I O I O I O I I I I I I O I/O I I I I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O
Address bus of internal register
Ground Power supply (3.3 V)
Data bus of internal register
Ground Power supply (3.3 V) Power supply (5 V) I/O I/O I/O I/O I/O I/O O I I I I I I I I O O O O O O O O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O

WAIT output Ground

Serial data input
Ground Power supply (5 V)

Serial data output

Ground

Parallel data bus

Power supply (5 V) Power supply (3.3 V)
Vss 89 DBDBDBDBDBDBDBDBDBDBVss 100 Vdd 101 DBDBDBDBDBDBDBDBDB111 TIMO/DBOB Vss 112 Vdd 113 DADADADADADADADAVss 122 DADADADADADADADAVss 131 Vdd 132 (n.c) 133 Vdd 134 DADADADADADADADAVss 143 DADADADADADADADAVdd 152 Vss 153 AAAAAAAAAAVss 164 Vdd 165 AAAAA171 A15/RAS 172 A16/CAS 173 A17/CE /WE 174 /OE 175 Vdd 176
Timing signal output/ Parallel data bus output/ input Ground Power supply (5 V)

Memory data bus

Ground Power supply (3.3 V) Not used Power supply (5 V) I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O O O O O O O O O O O O O O O O O O O O O
Power supply (5 V) Ground
Memory address (SRAM, PSRAM, DRAM)
Ground Power supply (3.3 V) Memory address (SRAM, PSRAM, DRAM) Memory address (SRAM, PSRAM) Memory address (SRAM, PSRAM), /RAS (DRAM) Memory address (SRAM, PSRAM), /CAS (DRAM) Memory address (SRAM), /CE (PSRAM) Memory write enable signal Memory output enable signal Power supply (5 V)
YM3437C-F (XM530A00) DIT2 (Digital Format Interface Transmitter)
PIN NO. NAME Vss MCLK DM0 DM1 I/O I I I PIN NO. Ground 9 Master clock input 10 DIN/BCLK/WCLK format select 11 DM1,DM0=0,0 DSP,LDSP (64 bit,LSB first) 12 DM1,DM0=0,1stereo,DSP (64 bit,MSB first) DM1,DM0=1,0 DSP2 (128 bit,MSB first) DM1,DM0=1,1 BB (64 bit,MSB first) System reset 13 Word clock input 14 Digital audio serial data input 15 FUNCTION Power supply (+5 V) 16 NAME MUTE VFL CCK CIN I/O I I I I FUNCTION

DM: IC17

Mute Validity flag C,U bit clock input/C bit data input C,U bit data input/U bit data input

RES WCIN DIN VDD

CLD CNTR CSM DOUT

I I I O

End of C,U bit input/16,20 bit/24 bit select 32 bit counter reset/Top of block Channel status input mode select CSM=0 Asynchronous mode CSM=1 Synchronous mode Digital interface formatted data output
AK4520A-VF-E2 (XT802A00) DAC & ADC
PIN NO. NAME I/O I I I I I I I I I I I O FUNCTION Positive Voltage Reference Input, VA Negative Voltage Reference Input, AGND Rch Analog Positive Input Rch analog Negative Input Lch Analog Positive Input Lch analog Negative Input Analog Power Supply Analog Ground Audio Data Interface Format Audio Data Interface Format Input/Output Channel Clock Audio Serial Data Clock Audio Serial Data Input Audio Serial Data Output PIN NO. NAME I/O I I I I/O I/O I I I I O O O FUNCTION Master Clock Input De-emphasis Frequency Select De-emphasis Frequency Select Test Pins (Pull Down Pins) 1 VREFH 2 VREFL 3 AINR+ 4 AINR5 AINL+ 6 AINL7 VA 8 AGND 9 DIFDIFLRCK 12 SCLK 13 SDTI 14 SDTO 15 MCLK 16 DEMDEMTSTTSTTSTVD 22 DGND 23 /PWDA 24 /PWAD 25 CMODE 26 AOUTL 27 AOUTR 28 VCOM

DM: IC104

Digital Power Supply Digital Ground DAC power-Down Mode ADC power-Down Mode Master Clock Select (H:384 fs,L:256 fs) Lch Analog Output Rch Analog Output Common Voltage Output, VA/2

IC BLOCK DIAGRAM

MB3790PF(XR967A00)

DM: IC4

V IN 14 V IN 13

R CN 0.5 100

V OUT V OUT

CONTROL 16

N.C. V BAT1 V OUT V OUT V BAT2 ALARM1 ALARM1 GND

CONTROL

N.C. V IN V IN
Reference Voltage Power Supply Circuit

2.65V 500

V IN 6 ALARM1
V IN 3A 2.37V 7 ALARM2 V SENSE 12 R

V SENSE CT RESET RESET

V OUT 9 V th:3V V OUT 10 V th:1.5V RESET RESET

GND 5 2

V BAT2

74AHC32DT(XZ103A00)

DM: IC5, IC6

74HC08DT(XZ108A00)

DM: IC7

74HC175DT(XZ113A00)

DM: IC110
1A 1B 1Y 2A 2B 2Y 7 GND 8 VCC 4B 4A 4Y 3B 3A 3Y
1A 1B 1Y 2Y 2A 2B 7 Vss 8 VDD 4B 4A 4Y 3Y 3A 3B

Quad D-Type Flip-Flop

CL 1Q 1Q 1D 2D 2Q 2Q Vss VDD 4Q 4Q 4Q 3D 3Q 3Q CK

V BAT1

Q CL CK Q D

C LQ CK D Q

Q D CK Q CL

Q CK CL Q

74HC244DT(XZ109A00)

DM: IC14, IC15, IC16

74HCU04DT (XZ110A00)

DM: IC107

TC74HC4040F(XR684A00)

DM: IC108

Bus Buffer

1G VDD(Vcc) 2G

INVERTER
1A 7 VSS 8 VDD 6A 6Y 5A 5Y 4A 4Y
12-Stage Binary Ripple Counter
Q12 Q6 Q5 Q7 Q4 Q3 Q2 Vss Q12 Q6 Q5 Q7 Q4 Q3 Q2 Q11 Q10 Q8 Q9 CL CK Q11 VDD Q11 Q10 Q8 Q9 CLR ( )

1A1 2Y4 1A2

1Y 1Y1 2A 2A4 2Y 2Y3 1A3 2Y2 1A4 2Y1 (GND)Vss 1Y2 3A 2A3 3Y 1Y3 2A2

10 Input Pulses 9 Q1

1Y4 2A1

74HC374DT(XZ102A00)

PN: IC301~IC307

74HC4052DT(XZ101A00)

PN: IC308, IC309

NJM072M(XC458A00)

DM: IC101
OUT PUT CONTROL 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND 9 10

Q OE D CK OE Q

Multiplexer
VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLOCK OY 2Y Y-COM 3Y 1Y INH VEE VSS 1 0Y 2Y 2X 9 VDD 2X 1X X-COM OX 3X A B

OP AMP

Output A Inverting Input A Non-Inverting Input A DC Voltage Supply V + 7 + 8 +DC Voltage Supply Output B Inverting Input B Non-Inverting Input B

D CK OE Q

CK D OE Q
Y-COM 1X 3Y 1Y INH X-COM 0X 3X A

Q OE D CK OE

Q CK D

NJM5532M (XC011A00)

DM: IC102, IC103, IC106

NJM4556AMT1 (XQ138A00)

DM: IC105
A OUT A IN A+IN V+ B OUT B IN B+IN

CIRCUIT BOARDS

DM Circuit Board
CN101: N.C. CN103: to PN1/2-CN301

CN102: N.C.

to PN A'

to PN1/2-CN302 A'

to PN1/2-CN303

to PN1/2-CN304

CN104: N.C.

Component side

DM: CNA-V588000

Pattern side

PN 1/2 Circuit Board

to PN2/2-CN306

to DM-CN3 A'

PN 2/2 Circuit Board

LD302, LD303, LD304 and LD306 installation

PN: CNA-V587990

to DM-CN103

to DM-CN2 A'

to DM-CN1

A to PN1/2-CN305

TEST PROGRAM
A. Connect each terminal as follows INPUT Monaural input OUT L/MONO Monaural output (RL47Kohm) OUT R Monaural output (RL47Kohm) HEAD PHONES Stereo output (323ohm each) EXP. PEDAL Connect VR of B50K. Pin 1 of JK: MIN of VR, Pin 2 of JK: MAX of VR, Pin3 of JK: CENTER of VR DIGITAL OUT Connect the DA converter. MIDI IN, MIDI OUT Connect IN and OUT by using DIN 5P cable. HIGH/LOW SW Used to select the input level. OFF: 0dB, ON: +10dB AC IN Connect the AC adapter. STAND-BY SW Power switch B. TEST PROGRAM 0: LED Check 1: SW Check 2: VR Check 3: Battery Check 4: MIDI Check 5: SRAM Check 6: DSP Check C. STARTING THE TEST PROGRAM While pressing the MANUAL, STORE and HALL switches, turn on the POWER switch. The TEST program will then be started. D. SELECTING THE TEST NUMBER Using the UP and DOWN switches, select the test number and press the STORE switch to confirm selection. E. TEST PROCEDURE 0: LED Check Using the UP and DOWN switches, select 0 and then press the STORE switch. LED segments light up one after another starting with UP. When SP.SIM is reached, BANK, 3, 2 and 1 light up followed by 7 segments in the following order from the left end. After that, all LED segments light up and go out.

ITEM 1. INPUT sensitivity 2. INPUT sensitivity 3. INPUT sensitivity 4. INPUT sensitivity 5. INPUT sensitivity 6. INPUT sensitivity 7. INPUT sensitivity 8. INPUT sensitivity 9. INPUT sensitivity 10. INPUT sensitivity 11. INPUT sensitivity 12. INPUT sensitivity 13. INPUT sensitivity 14. INPUT sensitivity 15. INPUT sensitivity 16. NOISE LEVEL 17. NOISE LEVEL 18. NOISE LEVEL 19. NOISE LEVEL 20. DISTORTION FACTOR 21. DISTORTION FACTOR 22. DISTORTION FACTOR 23. DISTORTION FACTOR 24. Digital Out
INPUT JK101(INPUT) -5dBm(1kHz) JK101(INPUT) -5dBm(10kHz) JK101(INPUT) -5dBm(100Hz) JK101(INPUT) -25dBm(100Hz) JK101(INPUT) -25dBm(10kHz) JK101(INPUT) -25dBm(1kHz) JK101(INPUT) -5dBm(1kHz) JK101(INPUT) -5dBm(10kHz) JK101(INPUT) -5dBm(100Hz) JK101(INPUT) -25dBm(100Hz) JK101(INPUT) -25dBm(10kHz) JK101(INPUT) -25dBm(1kHz) JK101(INPUT), SW101 ON -35dBm(1kHz) JK101(INPUT), SW101 ON -35dBm(10kHz) JK101(INPUT), SW101 ON -35dBm(100Hz) JK101(INPUT)/No Filter/GND short JK101(INPUT)/No Filter/GND short JK101(INPUT)/No Filter/GND short JK101(INPUT) /No Filter/GND short JK101(INPUT) /No Filter-5dBm(1kHz) JK101(INPUT)/No Filter -25dBm(1kHz) JK101(INPUT)/No Filter -5dBm(1kHz) JK101(INPUT)/No Filter -25dBm(1kHz) JK101(INPUT)/No Filter -15dBm(1kHz)
OUTPUT JK103(OUT L/MONO) +1.0dBm+/-3dB JK103(OUT L/MONO) +1.0dBm+/-3dB JK103(OUT L/MONO) +1.0dBm+/-3dB JK104(OUT R) -1.0dBm+/-3dB JK104(OUT R) -1.0dBm+/-3dB JK104(OUT R) -1.0dBm+/-3dB JK102(HP L) -0.5dBm+/-3dB JK102(HP L) -0.5dBm+/-3dB JK102(HP L) -1.5dBm+/-3dB JK102(HP R) -3.5dBm+/-3dB JK102(HP R) -2.5dBm+/-3dB JK102(HP R) -2.5dBm+/-3dB JK104(OUT R) -0.5dBm+/-3dB JK104(OUT R) -0.5dBm+/-3dB JK104(OUT R) -0.5dBm+/-3dB JK103(OUT L/MONO) -45dBm JK104(OUT R) -45dBm JK102(HP L) -45dBm JK102(HP R) -45dBm JK103(OUT L/MONO) 0.5% JK104(OUT R) 0.5% JK102(HP L) 0.5% JK102(HP R) 0.5% JK2(Digital Out) Lch -18dBm+/-3dB Rch 0dBm+/-3dB
HOW TO CONFRIM ROM VERSION Turn on the power while pressing DOWN and MANUAL SW switches, and the model name appears as dG.S for about 2 seconds and then the version number as *.** also for about 2 seconds. (Each * represents a numeric figure.) Read that number for confirmation. The normal mode will then be resumed.

ERROR MESSAGES

If an error occurs during operation, one of the following error message numbers will appear on the display.
E1: MIDI Receive Buffer Full
CAUSE: Too much MIDI data is being received by the DG amplifier at one time. SOLUTION: Try reducing the amount of data being sent or, break the data into smaller blocks.

E2: Communication Error.

CAUSE: An abnormality is detected during MIDI communications. SOLUTION: Check all connections, etc. and try again.
E3: Bulk Receive Check Sum Error.
CAUSE: The check sum does not match the received MIDI bulk data. SOLUTION: Check all connections and data, and try again.
E4: Bulk Receive Data Abnormality.
CAUSE: An abnormality is detected in the received MIDI bulk data. SOLUTION: Check all connections and data, and try again.
E5: Backup Battery Error.
CAUSE: Backup battery power is depleted. SOLUTION: Continued use of the device will result in the loss of data. Return the device to the music dealer where you purchased it or, have the battery replaced.
[ Guitar Pre Amplifier with Multi Effects] Date:30-Jun-2000 Model DG stomp MIDI Implementation Chart Version : 1.0 +----------------------------------------------------------------------+ : : Transmitted : Recognized : Remarks : : Function. : : : : :-------------------+----------------+----------------+----------------: :Basic Default : 1 - 16 : 1 - 16, off : memorized : :Channel Changed : 1 - 16 : 1 - 16, off : : :-------------------+----------------+----------------+----------------: : Default : 1,3 : 1,3 : memorized : :Mode Messages : x : x : : : Altered : ************** : x : : :-------------------+----------------+----------------+----------------: :Note : x : x : : :Number : True voice: ************** : x : : :-------------------+----------------+----------------+----------------: :Velocity Note ON : x : x : : : Note OFF : x : x : : :-------------------+----------------+----------------+----------------: :After Key's : x : x : : :Touch Ch's : x : x : : :-------------------+----------------+----------------+----------------: :Pitch Bender : x : x : : :-------------------+----------------+----------------+----------------: : 0 : x : x : : : 1 - 31 : o : o : : : 32 - 63 : x : x : : : 64 - 95 : o : o : : : Control 95 -127 : x : x : : : : : : : : Change : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :-------------------+----------------+----------------+----------------: :Prog : o 0 - 127 : o 0 - 127 : : :Change : True # : ************** : : : :-------------------+----------------+----------------+----------------: :System Exclusive : o : o : Bulk Dump : :-------------------+----------------+----------------+----------------: :System : Song Pos. : x : x : : : : Song Sel. : x : x : : :common : Tune : x : x : : :-------------------+----------------+----------------+----------------: :System :Clock : x : x : : :Real Time :Commands: x : x : : :-------------------+----------------+----------------+----------------: :Aux :All Sound OFF: x : x : : : :Reset All Cntrls : x : x : : : :Local ON/OFF : x : x : : : :All Notes OFF: x : x : : :Mes- :Active Sense : o : x : : :sages:Reset : x : x : : :-------------------+----------------+----------------+----------------: : : : : +-------------------+----------------+----------------+----------------+ Mode 1 : OMNI ON, POLY Mode 2 : OMNI ON, MONO o : Yes Mode 3 : OMNI OFF, POLY Mode 4 : OMNI OFF, MONO x : No

YAMAHA

PARTS LIST
CONTENTS OVERALL ASSEMBLY ELECTRICAL PARTS... 2.. 4
Notes : DESTINATION ABBREVIATIONS A : Australian model B : British model C : Canadian model D : German model E : European model F : French model H : North European model I : Indonesian model J : Japanese model
M : South African model O : Chinese model Q : South-east Asia model T : Taiwan model U : U.S.A. model V : General export model (110V) W: General export model (220) N,X : General export model Y : Export model
Components having special characteristics are marked specification equal to those originally installed. and must be replaced with parts having
The numbers QTY show quantities for each unit. The parts with -- in PART NO. are not available as spare parts. This mark } in the REMARKS column means these parts are interchangeable. ) part number is O, not zero. The second letter of the shaded ( ) part number is I, not one. The second letter of the shaded (

OVERALL ASSEMBLY

70 10f 10b 10e

10a 80

50 10c

P10-2 P90 P50 P40

P30 P60

10h 10g 10i 10j

10c 30

100 20

REF NO.

PART NO.

--* V5734300 * V5734500 EP600190 -* V5880000 VS246400 LX200060 VL802300 ET800150 --VC161100 * V5734400 EP600190 V3694100 * V5851800 * V5852300 VZ429100 VZ968600 VU859300 --* P10-1 AAX19500 * P10-2 AAX19510 * P20 V 0 P30 -P40 -P50 -P60 -P90 -10 10a 10b 10c 10d 10d-1 10d-2 10e 10f 10g 10h 10i 10j 80 100
DESCRIPTION OVERALL ASSEMBLY Overall Assembly Top Cover Assembly Top Cover Meter Cover Bind Head Tapping Screw-B Circuit Board Assembly Circuit Board Lithium Battery Hexagonal Nut Flat Washer Toothed Lock Washer-A Circuit Board Assembly Shield Film Bind Head Tapping Screw-P Bottom Case Bind Head Tapping Screw-B Knob (CH) Spacer Knob (FX) Button(S) Button(L) Leg Circuit Board Assembly Circuit Board Circuit Board Circuit Board Button Wire Assembly Wire Assembly Wire Assembly Wire Assembly Wire Assembly
REMARKS DG-STOMP (V573350) (V573420)
3.0X8 MFZN2BL (V600780) DG-STOMP CR2450 9.0 12X2 MFNI33 9X14 0.5 FNM3 9.0 MFZN2Y (V600800) (V585150) 3.0X12 MFZN2BL 3.0X8 MFZN2BL DG60-112
GRAY NO.947 CD-GRAY SR200 PN (AAX19500+AAX19510) (Foot SW Sheet)

4 (V600800) (V587990)

17 C&C #28 12P L100 C&C #28 11P L100 C&C #28 9P L100 C&C #28 6P L250 C&C #28 14P L 50 (V611450) (V611460) (V611470) (V611480) (V610850)
Accessories V 0 AC Adapter V 0 AC Adapter V 0 AC Adapter
AC-10 J AC-10 U,C AC-10 H

J U, C H

: New Parts

RANK: Japan only

ELECTRICAL PARTS

* * * *

DESCRIPTION ELCTRIC PARTS V 0 Circuit Board AAX19500 Circuit Board AAX19510 Circuit Board (Foot SW Sheet) V5880000 -VB763800 VK863100 VS246300 UX145100 UX145100 UR838100 UX145100 UX145100 UR838100 UX145100 UX145100 UR857100 UX145100 UX145100 UR857100 UX145100 UX061120 UX061120 UR838100 UX145100 UX145100 UR838100 UX145100 UX145100 UX064100 UX064100 UX145100 UX145100 UX062220 UX064100 UX064100 UX145100 UX145100 UX064100 UY065220 UX062100 UR857100 V6197100 V6197100 UX061100 UX145100 UX145100 UX061220 UX063100 V6197100 UX061680 UX061220 UX063100 UR857100 UX145100 UR857100 UR857100 UX145100 UX145100 UR857100 UR857100 UX145100 UX145100 UR857100 V6197100 V6197100 UX061220 UR857100 Circuit Board Heat Sink Bind Head Screw IC Socket Battery Holder Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.-BP Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.-BP Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap.

DESCRIPTION Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.-BP Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap. Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap.(chip) Electrolytic Cap. Electrolytic Cap. Connector Base Post Connector Base Post Connector Base Post Connector Base Post Diode Diode Diode Diode Diode Diode Diode IC IC IC IC IC IC IC IC IC IC IC IC
REMARKS 47.00 25.0V 1000P 50V K 10.00 35.0V 22P 50V J 10.00 35.0V 47.00 25.0V 1000P 50V K 22P 50V J 10.00 35.0V 10.00 35.0V 100P 50V J 22P 50V J 10.00 35.0V 10.00 35.0V 100P 50V J 100.00 25.0V 100.00 25.0V 10.00 35.0V 10.00 35.0V 1.00 50.0V 4.70 50.0V 100.00 25.0V 0.1000 25V Z 0.1000 25V Z 100.00 25.0V 0.1000 50V Z 0.1000 50V Z 3300 35.0V 0.1000 50V Z 0.1000 25V Z 100.00 16.0V 1000 16.0V 1000 16.0V 470.00 35.0V 470.00 50.0V 0.1000 50V Z 0.1000 25V Z 100.00 25.0V 100.00 25.0V 220.00 25.0V 220.00 25.0V 5P 50V C 5P 50V C 0.1000 25V Z 0.1000 25V Z 1.00 50.0V 1.00 50.0V M2426XX 12P TE M2426XX 11P TE M2426XX 9P TE M2426XX 6P TE 1SS355 TE-17 1SS355 TE-17 1SS355 TE-17 1SR154-400 1SS355 TE-17 1SR154-400 1SR154-400 MSM27C802CZ-NRS W24258S-70LE-EL10 CY62256LL-70SNCT W24258S-70LE-EL10 CY62256LL-70SNCT MB3790PF ASSP 74AHC32DT 74AHC32DT 74HC08DT YSS910-S YSS910-S MSM514260C-60JS
01 8M 256K 256K 256K 256K ASSP OR OR AND DSP6 DSP6 4M 05

07 RANK: Japan only

* * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * *
IC10 IC11 IC11 IC12 IC13 IC13 IC14 IC15 IC16 IC17 IC18 IC101 IC102 IC103 IC104 IC105 IC106 IC107 IC108 IC109 IC110 IC111 IC112 IC113 IC114 JK1 JK2 JK3 JK101 JK102 JK103 JK104 JK105 J1 -3 J101 -108 K1 K101 L1 -6 L7 L8 L101 RA1 -18 R1 R2 -8 R9 R10 R11 R12 R13 R14 -16 R17 R18 R19 R20 R21 R22 R23 R24 R26 R27 R101 R102 R103 R104
PART NO. XV839A00 XV077A00 XV839A00 XQ375A00 VN686000 VR903700 XZ109A00 XZ109A00 XZ109A00 XM530A00 XU965A00 XC458A00 XC011A00 XC011A00 XT802A00 XQ138A00 XC011A00 XZ110A00 XR684A00 XZ112A00 XZ113A00 XZ162A00 XJ607A00 XD853A00 XD854A00 V6177500 V6178000 V6177700 V3633400 V6177700 V3633400 V3633400 V6177200 ----VB966900 VV075700 VS740100 VS740100 VC548200 V6178900 VG238200 RH047100 RH047100 RG007100 RG005100 RG005100 RG005270 RG007100 RG007100 RG006100 RG005220 RG007100 RG007100 RG006220 RG005220 RG005220 RG006100 RG006100 RG009100 RG004470 RG004750 RG007100 RG000000 RG007100 RG009100 RG006470 RG006470

DESCRIPTION IC IC IC IC Photo Coupler Photo Coupler IC IC IC IC IC IC IC IC IC IC IC IC IC IC IC IC IC IC IC DIN Connector Pin Connector Phone Jack Phone Jack Phone Jack Phone Jack Phone Jack Connector Jumper Wire Jumper Wire Jumper Wire Jumper Wire Style Pin Terminal Plate Chip Inductance Chip Inductance Pulse Transformer Noise Filter LC Filter Resistor Array Resistor Array Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip) Carbon Resistor (chip)
REMARKS SDM4260CLU-6S MSM514260C-60JS SDM4260CLU-6S HD6413002FP16 PC410T HCPL-M600 74HC244DT 74HC244DT 74HC244DT YM3437C-F UPC29M33T-E1 NJM072M NJM5532M NJM5532M AK4520A-VF-E2 NJM4556AMT1 NJM5532M 74HCU04DT TC74HC4040F 74HC164DT 74HC175DT NJM78M05DLA NJM7805FA NJM7815FA NJM7915FA 5P3 HDC-052A HSP-241V1B HTJ-064-12D HTJ-064-12I HTJ-064-12D HTJ-064-12I HTJ-064-12I HTJ-020-05A 0.55 0.55 0.55 0.55 IMSA-6024 BLM21B751S 2125 BLM21B751S 2125 TC-1019-06 7MM ZJYS51R5-2PT PLT2003C 10KX4 10KX4 10K 0.1 J 100 0.1 J 100 0.1 J 270 0.1 J 10K 0.1 J 10K 0.1 J 1.0K 0.1 J 220 0.1 J 10K 0.1 J 10K 0.1 J 2.2K 0.1 J 220 0.1 J 220 0.1 J 1.0K 0.1 J 1.0K 0.1 J 1.0M 0.1 J 47 0.1 J 75 0.1 J 10K 0.1 J 0 0.1 J 10K 0.1 J 1.0M 0.1 J 4.7K 0.1 J 4.7K 0.1 J 4M 4M 4M CPU
BUS BUFFER BUS BUFFER BUS BUFFER DIT2 3.3V REGULATOR OP AMP OP AMP OP AMP ADC&DAC OP AMP OP AMP INVERTER B. COUNTER SHIFT REGISTANT D-FF 5V REGULATOR 5V REGULATOR REGULATOR REGULATOR
(VA07890) (VA07890) (VA07890) (VA07890) 04 04
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
R105 R106 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R162 R163 R164 R165 R166 R167 SW101 * SW102 TR1 TR2 TR101 -106 TR107 TR108

GUITAR PRE-AMPLIFIER

Owners Manual

FCC INFORMATION (U.S.A.)

1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product. 2. IMPORTANT: When connecting this product to accessories and/ or another product use only high quality shielded cables. Cable/s supplied with this product MUST be used. Follow all installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the USA. 3. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class B digital devices. Compliance with these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interference with other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the users manual, may cause interference harmful to the operation of other electronic devices. Compliance with FCC
* This applies only to products distributed by YAMAHA CORPORATION OF AMERICA.
regulations does not guarantee that interference will not occur in all installations. If this product is found to be the source of interference, which can be determined by turning the unit OFF and ON, please try to eliminate the problem by using one of the following measures: Relocate either this product or the device that is being affected by the interference. Utilize power outlets that are on different branch (circuit breaker or fuse) circuits or install AC line filter/s. In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in is 300 ohm ribbon lead, change the lead-in to co-axial type cable. If these corrective measures do not produce satisfactory results, please contact the local retailer authorized to distribute this type of product. If you can not locate the appropriate retailer, please contact Yamaha Corporation of America, Electronic Service Division, 6600 Orangethorpe Ave, Buena Park, CA90620 The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries.

NEDERLAND / NETHERLAND

Dit apparaat bevat een lithium batterij voor geheugen back-up. This apparatus contains a lithium battery for memory back-up. Raadpleeg uw leverancier over de verwijdering van de batterij op het moment dat u het apparaat ann het einde van de levensduur afdankt of de volgende Yamaha Service Afdeiing: Yamaha Music Nederland Service Afdeiing Kanaalweg 18-G, 3526 KL UTRECHT Tel. 030-2828425 For the removal of the battery at the moment of the disposal at the end of the service life please consult your retailer or Yamaha Service Center as follows: Yamaha Music Nederland Service Center Address : Kanaalweg 18-G, 3526 KL UTRECHT Tel : 030-2828425 Gooi de batterij niet weg, maar lever hem in als KCA. Do not throw away the battery. Instead, hand it in as small chemical waste.

ADVARSEL!

LithiumbatteriEksplosionsfare ved fejlagtig hndtering. Udskiftning m kun ske med batteri af samme fabrikat og type. Levr det brugte batteri tilbage til leverandren.

VARNING

Explosionsfara vid felaktigt batteribyte. Anvnd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera anvnt batteri enlight fabrikantens instruktion.

VAROITUS

Paristo voi rjht, jos se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti.
IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord
IMPORTANT. The wires in this mains lead are coloured in accordance with the following code: BLUE : NEUTRAL BROWN : LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured makings identifying the terminals in your plug proceed as follows: The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. Making sure that neither core is connected to the earth terminal of the three pin plug.

The exclamation point within the equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
The lightning flash with arrowhead symbol, within the equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electrical shock.
This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd.
IMPORTANT SAFETY INSTRUCTIONS
INFORMATION RELATING TO PERSONAL INJURY, ELECTRICAL SHOCK, AND FIRE HAZARD POSSIBILITIES HAS BEEN INCLUDED IN THIS LIST.
WARNING- When using any electrical or electronic product, basic precautions should always be followed. These precautions include, but are not limited to, the following:
This product was NOT designed for use in wet/damp locations and should not be used near water or exposed to rain. Examples of wet /damp locations are; near a swimming pool, spa, tub, sink, or wet basement.
Read all Safety Instructions, Installation Instructions, Special Message Section items, and any Assembly Instructions found in this manual BEFORE making any connections, including connection to the main supply.
Do not attempt to service this product beyond that described in the user-maintenance instructions. All other servicing should be referred to qualified service personnel.
This product should be used only with the components supplied or; a cart ,rack, or stand that is recommended by the manufacturer. If a cart, rack, or stand is used, please observe all safety markings and instructions that accompany the accessory product.
Main Power Supply Verification: Yamaha products are manufactured specifically for the supply voltage in the area where they are to be sold. If you should move, or if any doubt exists about the supply voltage in your area, please contact your dealer for supply voltage verification and (if applicable) instructions. The required supply voltage is printed on the name plate. For name plate location, please refer to the graphic found in the Special Message Section of this manual.

The power supply cord (plug) should be disconnected from the outlet when electronic products are to be left unused for extended periods of time. Cords should also be disconnected when there is a high probability of lightening and/or electrical storm activity.
Care should be taken that objects do not fall and liquids are not spilled into the enclosure through any openings that may exist.
DANGER-Grounding Instructions: This product must be grounded and therefore has been equipped with a three pin attachment plug. If this product should malfunction, the ground pin provides a path of low resistance for electrical current, reducing the risk of electrical shock. If your wall socket will not accommodate this type plug, contact an electrician to have the outlet replaced in accordance with local electrical codes. Do NOT modify the plug or change the plug to a different type!
Electrical/electronic products should be serviced by a qualified service person when: a. The power supply cord has been damaged; or b. Objects have fallen, been inserted, or liquids have been spilled into the enclosure through openings; or c. The product has been exposed to rain; or d. The product does not operate, exhibits a marked change in performance; or e. The product has been dropped, or the enclosure of the product has been damaged.
WARNING: Do not place this product or any other objects on the power cord or place it in a position where anyone could walk on, trip over, or roll anything over power or connecting cords of any kind. The use of an extension cord is not recommended! If you must use an extension cord, the minimum wire size for a 25' cord (or less) is 18 AWG. NOTE: The smaller the AWG number, the larger the current handling capacity. For longer extension cords, consult a local electrician.
This product, either alone or in combination with an amplifier and headphones or speaker/s, may be capable of producing sound levels that could cause permanent hearing loss. DO NOT operate for a long period of time at a high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an audiologist. IMPORTANT: The louder the sound, the shorter the time period before damage occurs.

Ventilation: Electronic products, unless specifically designed for enclosed installations, should be placed in locations that do not interfere with proper ventilation. If instructions for enclosed installations are not provided, it must be assumed that unobstructed ventilation is required.
Temperature considerations: Electronic products should be installed in locations that do not seriously contribute to their operating temperature. Placement of this product close to heat sources such as; radiators, heat registers etc., should be avoided.
Some Yamaha products may have benches and/or accessory mounting fixtures that are either supplied as a part of the product or as optional accessories. Some of these items are designed to be dealer assembled or installed. Please make sure that benches are stable and any optional fixtures (where applicable) are well secured BEFORE using. Benches supplied by Yamaha are designed for seating only. No other uses are recommended.

PLEASE KEEP THIS MANUAL

92-469-3
Thank you for purchasing the Yamaha DG-1000 Guitar Pre-amplifier. From its initial conception, the DG-1000 has been entirely developed by Yamaha. The DG-1000 delivers powerful tube amp sounds and offers stability that can not be found in other tube amplifiers. The DG-1000 reproduces 8 preset amp types that can then be custom tailored by the user. A total of 128 sound settings can be stored in internal memory, that can be freely recalled using the panel buttons or a MIDI foot controller. Easy to use controls and a high level of quality will help supply you with a wide variety of tonal colors. To get the best results and longest life out of your DG1000, we recommend that you carefully read this manual. Also, keep this manual in a safe place for future reference.

s Specifications

A/D Converter D/A Converter Sampling Frequency Memory Input Impedance Output Impedance Controllers Analog Digital TRIM, OUTPUT GAIN, MASTER, TREBLE, HIGH MID, LOW MID, BASS, PRESENCE, AMP SELECT (LEAD1, LEAD2, DRIVE1, DRIVE2, CRUNCH1, CRUNCH2, CLEAN1, CLEAN2), RECALL, MIDI Display AMP SELECT display LED x 8, MODE display LED x 3, 7 Segment LED x 2 Place Indicator TRIM level display LED (green) TRIM clip display LED (red) Power Requirements UL CSA : AC 120 V SEMKO BS : AC 230 V Power Consumption Size (W x H x D) Weight 20 Watts 480 x 89 x 275 mm ( 18.9 x 3.5 x 10.8) 6.0 kg (13 lbs. 4 oz) , , STORE, 20 bit + 5 bit Floating 20 bit 48kHz 128 1M (Input Jack) 1k (Output Jack)

CONTENTS

The Panel Controls... 3 Connecting the DG-1000.. 4
s Connecting Procedure.. 4
How to use the DG-1000.. 4
s First, acquire sound.. 4 s Set the TRIM level.. 4 s Set the OUTPUT level.. 4 s Sound Setting... 4

Store and Recall... 5

s Store Settings... 5 s Recall Memory.. 5
MIDI Operations (MIDI Mode).. 6 MIDI Implementation Chart.. 7

About the Backup Battery

A backup battery (lithium battery) is used to keep internal data (settings) from being lost, even when the power cord is unplugged. Internal data will be lost when battery power is depleted, so it is recommended that data be stored to an external data recorder such as the Yamaha MIDI Data Filer MDF2 ( pg. 6), or keep records of settings in memo form. The average battery life span is about 3 years. When replacement becomes necessary contact the music store where the unit was purchased, or a qualified service representative, to perform the replacement. Do not attempt to replace the backup battery by yourself. Keep the backup battery out of reach of children. E6 appears in the display when the battery becomes depleted. Internal data may be lost. Data may be lost if the unit is improperly handled or if repairs are performed.
* Specifications and design may change without notice.

The Panel Controls

s Front Panel

w e u i o !0 !1 !2 !4

s Rear Panel

!6 !7 !5

q Input Jack (INPUT)
Connect the guitar to this jack. * Switch the power OFF before connecting the guitar.
EDIT (Edit mode) Automatically enters this mode when tone control or amp select settings are changed. ( pg. 4) MIDI (MIDI Mode) MIDI functions are edited in this mode. Press the MIDI button u to enter the MIDI mode. ( pg. 6)

w Trim Control (TRIM)

Matches the guitar output level to the pre-amps input level. ( pg. 4) * TRIM level settings are not stored in memory.

!0 Display

Displays Memory Numbers, Program Change Numbers, MIDI Channel, etc.

e Output Level Control (OUTPUT)
Controls the output level of the OUTPUT jack on the back panel. Matches the output level to the amps input level. ( pg.4) * Output level settings are not stored in memory.

Buttons

r Gain Volume (GAIN)
Controls the amount of distortion. * No sound will be produced if GAIN is set to 0, even if the MASTER volume t is turned up.
Increases or decreases the memory number by 1. Also, increases or decreases values by 1, or switches the MIDI mode ON/OFF when in the MIDI mode. Values change continuously when the button is pressed and held.

!2 STORE Button (STORE)

Press this button to save current sound settings to internal memory. ( pg. 5) Also, used to carry out bulk dump functions in the MIDI mode. ( pg. 6)

t Master Volume (MASTER)

Controls the overall volume of GAIN and tone controls settings.
y Tone Controls (TREBLE, HIGH MID, LOW MID, BASS, PRESENCE)
Controls the levels of their respective frequencies.
!3 RECALL Button (RECALL)
Recalls settings from memory. Use the / buttons to select a memory number (01 128), then press the RECALL button to recall those settings from memory. ( pg. 5)

u MIDI Button

Press this button to edit settings in the MIDI mode. ( pg. 6)

!4 POWER Switch (POWER)

The power switch for the DG-1000. * Set the OUTPUT Volume e to 0 before turning the POWER ON/OFF.
i Amp Select Button/Amp Select Display (LEAD 1, 2/DRIVE 1,2/CRUNCH 1,2/CLEAN 1,2)
Selects one of the 8 preset amp types. The currently selected amp type is shown on the display. ( pg. 4) Also acts as the MIDI function switch when in the MIDI mode. ( pg. 6) * When the amp select button is pressed, knobs r y will return to their preset positions (GAIN & MASTER = 7, Tone Controls all = 5).

!5 OUTPUT Jack (OUTPUT)

Connect to the power amp (or guitar amp). ( pg. 4)

!6 MIDI IN Jack

Connected to a MIDI Foot Controllers MIDI OUT jack, the DG-1000 can be controlled by an external foot controller. ( pg. 6)

o Mode Display Lamp (PLAY/EDIT/MIDI)
Displays the DG-1000s currently selected mode. PLAY (Play Mode): Automatically enters this mode when a memory number is recalled, and when the power is switched on. ( pg. 4)

!7 MIDI OUT/THRU Jack

Connect to the MIDI IN jack of a device that can save MIDI data. Data stored in the DG-1000s memory can be saved to an external MIDI device (MIDI Data Filer, etc.). ( pg. 5) Also, sends MIDI data, received by the MIDI IN jack !6, to an external device when MIDI Merge is set to ON. ( pg. 6)

Connecting the DG-1000

To set up a guitar amp system, connect the DG-1000 to a power amp and speaker. As you know, power amps and speakers all have their own special characteristics. So the sounds character will change according to the type of devices used. The combined result of each devices character, room temperature, room humidity, and a variety of other factors, determines the guitars sound. The purpose of the DG-1000 is to create sound by faithfully reproducing the dynamic range and tone nuance of the guitar as well as preserving the characteristics of the power amp, speakers, etc. The DG-1000 will surely provide you with the means to create your own personal sound.

How to use the DG-1000

Once the amp and speaker has been properly set up, try getting some sound out of the system.

s First, acquire sound

1. With the DG-1000 and power amp (guitar amp) power switched OFF, connect the guitar to the INPUT jack on the front panel. 2. With the OUTPUT knob set to 0, switch the power ON. 3. A short time after the power has been switched ON, the DG1000s internal relay will produce a small Click sound. Once the sound is heard, set the power amps (guitar amps) volume to 0 and switch the power ON on the power amp (guitar amp). 4. At first, set the DG-1000s TRIM and OUTPUT levels to 5 and strum the guitar. Then adjust the power amps volume level. 5. Once you have sound, set the TRIM and OUTPUT levels as described in the following procedures.

s Connecting Procedure

Make sure that the power is switched OFF on the DG1000 and the power amp (guitar amp) before making any connections.
1. Connect the OUTPUT jack on the rear panel of the DG-1000 to the INPUT jack on the power amp using a cable. * Choose a cable that matches the required jack standard. The DG1000s OUTPUT jack is monaural. 2. Connect the power amps speaker output (SPEAKER, etc.) to a speaker. * Use a speaker that matches the power characteristics of the amp (power capacity, system impedance). DG-1000 Speaker

s Set the TRIM level

The TRIM level is used to set the output level of the guitar to an optimum level for the DG-1000s INPUT jack. Depending on the TRIM level subtle picking nuances and the attack of a strong strum can be realized. An improperly adjusted trim level will result in noise, feedback and a cut up sound. * Output levels vary according to the type of guitar used. If a different guitar is used, adjust the trim level to match the guitar. * Even to create distortion, make sure that the TRIM level is properly adjusted, and use the GAIN control to create distortion. 1. Set the guitars volume to its maximum level and strum it powerfully. Begin to adjust the TRIM level. An optimum level is achieved when the Green LED is lit. 2. Continue adjusting the TRIM knob until the Red LED lights. Set the TRIM level to 10 if the Red LED does not light. If the Red LED lights, lower the TRIM level until the Green LED lights.

OUTPUT

Power Amp

SPEAKER

q Connecting the DG-1000 to a guitar amp is also possible

Guitar Amp

RETURN or INPUT (RETURN is better) OUTPUT

s Set the OUTPUT level

Use the OUTPUT knob to set the DG-1000s required OUTPUT level. DG-1000
q Add a stereo effector to the system

s Sound Setting

DG-1000
Choose one of the DG-1000s 8 preset amp types, then use the GAIN+MASTER, and Tone Controls to shape the sound. 1. With one of the AMP SELECT buttons choose an amp type. The LED will light on the selected amp type button. 2. Use the GAIN, MASTER, and the 5 Tone Controls to shape the sound. * When an AMP SELECT button is pressed, all knobs (Except TRIM and GAIN) will return to their preset positions (GAIN & MASTER = 7, Tone Controls all = 5). To save edited settings, refer to Store Settings on the next page.

Stereo Effect

2 CH Power Amp

Speaker

Store and Recall
The DG-1000 has an internal memory that can hold up to 128 amp type and settings. Each memory can be recalled at any time. Motor drives in the knobs will automatically set them to the proper positions. Try storing a sound you created to memory.

s Store Settings

1. Create a sound using the 8 preset amp types, GAIN, MASTER, and the 5 Tone Controls. The EDIT lamp lights on the MODE display. * If MODE displays MIDI lamp is lit, press the the EDIT lamp lights. 2. Use the / button so that

s Recall Memory (Recall)

The settings stored in memory can easily be recalled by selecting a memory number. 1. Check the Mode Display lamp. If PLAY is lit: Go to the next step. If EDIT is lit: The current settings are not stored in memory. If you want to save those settings, use the Store Settings procedure on the left page, then proceed to the next step. If MIDI is lit: Press the 2. Use the / button to return to the PLAY or EDIT mode. buttons to select the memory number to be
buttons to select the memory number to which
the settings will be saved. The memory number will flash in the display. / buttons to make memory num* Press and hold one of the bers cycle rapidly. * The third digit of the memory number (100 128) is represented by a dot between the two digits. Sample) 128 is displayed as 3. Hold the button, for about one second, until 8.8 ap. pears on the display. Release the button, the flashing memory number will then light indicating the setting is saved to memory. * TRIM and OUTPUT settings are not stored in memory. Use the MASTER knob to set backing and solo levels. Store Execute

recalled. The memory number appears on the display (flashing). 3. Press the button. The flashing memory number will
then light. Each of the knobs, and the Amp Select Display will change according to the data recalled from memory. * Settings do not change until the button is pushed. * TRIM and OUTPUT knob settings will not change with the Recall operation. * It takes anywhere from seconds for the knob settings to change however, internal settings (sound) will change instantly. * E1 will appear on the display if the volume knob does not go to its assigned position, or the device does not recognize the recall command after 20 seconds from the start of the operation. Continued use of the device in this condition may result in fire or electrical shock. Take the unit to the music dealer where you purchased it, or to the nearest Yamaha Service Center for repair. The memory number to be recalled goes from flashing display lit display

Lights

The memory number to be stored. Flashing 8.8. Lights

Select the memory number

Data stored in memory (1 128) can be saved to an external MIDI storage device. Refer to the next page for details.

PLAY or EDIT Lights

Select the memory number to be recalled.

Recall Execute

HINT Some hints on storing memory numbers
When storing memory, divide the memory numbers into several groups. Recalling memory from these groups is convenient. For example, Create groups according to the amp type (LEAD1, DRIVE 1, etc.). For example, memory numbers are LEAD 1 sounds. Create groups based on sound type (Distortion, Clean, etc.) Create groups based on live performance song lists. Create groups based on the type of guitar used (humbucker, etc.). Its also a good idea to keep a chart listing what types of sounds are stored in memory numbers.
A MIDI foot controller or other external MIDI device can be used to select and recall memory. Refer to the following page for details.

Initialize the memory

Use the following operation to restore all of the internal memory (No. 1 128) to its original initialized condition (GAIN & MASTER = 7, All tone controls = 5). Anything that you have saved to memory will be lost so please use caution. [Operation] While holding both the switch the POWER ON. button and the button,

MIDI Operations (MIDI Mode)

s What is MIDI?

MIDI is the abbreviation for: Musical Instruments Digital Interface. MIDI is a world standard communication interface that allows MIDI compatible musical instruments and computers to share musical information and control one another regardless of instrument type or maker. With the DG-1000, an external MIDI controller can be used to recall memory settings (program change), an external MIDI controller can be used to control the main volume (control change), and memory and MIDI settings can be exchanged with an external MIDI device (bulk dump). * After the Main Volume data is changed, and the external MIDI device is disconnected, the pre-amps volume level may not be sufficient. If this case occurs, transmit a Control Change with a higher volume setting again, or switch the POWER OFF and then back ON.

s Setting the MIDI Merge

To have data received by the DG-1000s MIDI IN jack, re-transmitted from the MIDI OUT jack, set the MIDI Merge to on. If not, set to oF. 1. Press the 2. Press the in the display. 3. Use the / buttons to select on/oF. button, the MIDI Display will light. button, the current MIDI Merge setting is shown
s Using MIDI to Recall Memory
Program change messages from a Yamaha MIDI Foot Controller MFC10, etc., or external MIDI device can be used to recall settings in the DG1000s memory. 1. Use a MIDI cable to connect the DG-1000s MIDI IN Jack to the MIDI OUT Jack on an external MIDI device. * Use only a standard MIDI cable that is less than 15 meters in length. Using a longer cable may result in abnormal operation. MIDI Cable

MIDI OUT

STATUS DATA/CTRL

s MIDI Bulk Out

The DG-1000s data can be sent to an external MIDI storage device (Yamaha MIDI Data Filer MDF2, etc.) for data backup. 1. Use a MIDI cable to connect the DG-1000s MIDI OUT Jack to the MIDI IN Jack on an external MIDI device. 2. Press the button. The MIDI display lamp will light.

MIDI IN

BANK MSB/MAX BANK LSB/MIN TOGGLE ON-OFF /NUMBER OF PGM

8.8.8.

DEC 10 INC /NO /YES

MEMORY EDIT

PC EDIT

WRITE /EXIT

3. To send data for the entire memory (128) + MIDI settings with the Bulk Out operation: Press the button. All is shown in the display.

External MIDI Device

To send a single memory with the Bulk Out operation: Press the 4. Press the Press the button. Use the / buttons to
2. Set the DG-1000s MIDI receive channel and the external MIDI devices MIDI transmit channel to the same MIDI channel. (the factory preset is channel 1). 2-1. Press the button, the MIDI display lamp will light. 2-2. Press the button, the currently set MIDI receive channel is shown on the display. / buttons to select the MIDI receive channel 2-3. Use the (, All, oF). * All is set to OMNI. 3. Create a program change table* (the factory preset is, Program Change No. = Memory No.). * For example, the received Program Change Number 1, recalls the DG-1000s Memory Number 5. To achieve this, assign the received program change number to the corresponding memory number. 3-1. With the Mode Display Lamp lit, press the button. 3-2. Use the / buttons to select a program change number (1 2.8). The selected number appears on the display. 3-3. Press the button.

select the memory number you wish to send. button to transmit the memory data. button to cancel the operation.
* The device number is the same as the MIDI receive channel. If the MIDI receive channel is set to OMNI ( All ) or OFF ( oF ), the MIDI channel will be set to 1.

s MIDI Bulk In

Use a MIDI cable to connect the DG-1000s MIDI IN Jack to the MIDI OUT Jack on an external MIDI device. Return DG-1000 backup data to the DG-1000. * The MIDI bulk in operation is carried out in the PLAY or EDIT modes only. It can not be carried out in the MIDI mode. * The device number is the same as the MIDI receive channel. If the MIDI receive channel is set to OMNI ( All ), the MIDI channel will be set to 1. It will not receive if it is set to OFF ( oF ). * Ld is shown on the display during the MIDI Bulk In operation.
3-4. Use the / buttons to select the corresponding memory number (1 2.8). The number appears on the display. 3-5. If necessary, repeat steps 3-1 through 3-4. 4. When program memory data is transmitted from an external MIDI device, the corresponding memory assigned to the Program Change Table will be recalled.

s Error Messages

If an error occurs during a MIDI operation, one of the following error message numbers will appear on the DG-1000s display.
E2: MIDI receive buffer full.
Too much MIDI data is being received by the DG-1000 at one time. Try to reduce the amount of data being sent or, break the data into smaller blocks. E3: Communication error. An abnormality is detected in the transmitted data. Check all connections and relevant settings and try again. E4: Bulk receive check sum error. A check sum error has been detected in the MIDI bulk data received by the DG-1000. Check all connections and relevant settings and try again.
s About MIDI Control Changes
You can control the overall volume of the DG-1000 by connecting an external MIDI devices MIDI OUT jack to the DG-1000s MIDI IN jack, and transmit Number 7 Control Change Messages (Main Volume) to the DG-1000. * With the exception of the Number 7 Control Change, the DG-1000 does not recognize any other MIDI Control Change messages. * The Main Volume data will not change, even if a different memory number is selected. * When the POWER is switched ON, the Main Volume data is set to its MAX value.
E5: Bulk receive data abnormality.
An abnormality has been detected in the MIDI bulk data reived by the DG-1000. Check all connections and relevant settings and try again.
[ Digital Guitar Pre Amplifier ] Date:9-Jan-1997 Model DG-1000 MIDI Implementation Chart Version : 1.0 +----------------------------------------------------------------------+ : : Transmitted : Recognized : Remarks : : Function. : : : : :-------------------+----------------+----------------+----------------: :Basic Default : x : 1 - 16, off : memorized : :Channel Changed : x : 1 - 16, off : : :-------------------+----------------+----------------+----------------: : Default : x : 1,3 : memorized : :Mode Messages : x : x : : : Altered : ************** : x : : :-------------------+----------------+----------------+----------------: :Note : x : x : : :Number : True voice: ************** : x : : :-------------------+----------------+----------------+----------------: :Velocity Note ON : x : x : : : Note OFF : x : x : : :-------------------+----------------+----------------+----------------: :After Key's : x : x : : :Touch Ch's : x : x : : :-------------------+----------------+----------------+----------------: :Pitch Bender : x : x : : :-------------------+----------------+----------------+----------------: : : x : x : : : 7 : x : o : Main Volume : : 8 - 127 : x : x : : : : : : : : Control : : : : : : : : : : Change : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :-------------------+----------------+----------------+----------------: :Prog : x : o 0 - 127 : Program Change : :Change : True # : ************** : : Number 1-128 : :-------------------+----------------+----------------+----------------: :System Exclusive : o : o : Bulk Dump : :-------------------+----------------+----------------+----------------: :System : Song Pos. : x : x : : : : Song Sel. : x : x : : :common : Tune : x : x : : :-------------------+----------------+----------------+----------------: :System :Clock : x : x : : :Real Time :Commands: x : x : : :-------------------+----------------+----------------+----------------: :Aux :Local ON/OFF : x : x : : : :All Notes OFF: x : x : : :Mes- :Active Sense : o : x : : :sages:Reset : x : x : : :-------------------+----------------+----------------+----------------: : : : : : : : : +-------------------+----------------+----------------+----------------+ Mode 1 : OMNI ON, POLY Mode 2 : OMNI ON, MONO o : Yes Mode 3 : OMNI OFF, POLY Mode 4 : OMNI OFF, MONO x : No

YAMAHA

Printed in Japan VU75530