Yamaha DG60FX-112 Schematic

DG60FX-112

GUITAR AMPLIFIER

SERVICE MANUAL

This document is printed on chlorine free (ECF) paper with soy ink.

011540

GA

20001101-75000

CONTENTS

SPECIFICATIONS ................................................ 3/4

PANEL LAYOUT .................................... 5

CIRCUIT BOARD LAYOUT ................. 7

BLOCK DIAGRAM

WIRING ................................................................... 10

DISASSEMBLY PROCEDURE ............................ 11

LSI PIN DESCRIPTION .............................. 15

IC BLOCK DIAGRAM ................................... 18

CIRCUIT BOARDS ........................................ 20

TEST PROGRAM ................................. 30

ERROR MESSAGES ............................. 33

IDLING ADJUSTMENT ........................ 33

MIDI IMPLEMENTATION CHART......................................... 34

PARTS LIST
OVERALL CIRCUIT DIAGRAM

1.552K-448 I.T Printed in Japan 2000.11

............................ 8

HAMAMATSU, JAPAN

1

DG60FX-112

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 per-

IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-

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 distributor’s Service Division.

WARNING : Static discharges can destroy expensive components. Discharge any static electricity your body may have

IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power

IMPORTANT NOTICE

sonal 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.

cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.

accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to
this bus.)

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 pre-

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.

cautions when handling or replacing lithium batteries.

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 and must be replaced with parts having specification equal to those
originally installed.

22

2

SPECIFICATIONS

DG60FX-112

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)

Analog Section

• 60 W Solid State Power Amp

• 30 cm Speaker (EMINENCE) x 1

MIDI Functions

Receive: Program Change (Program Change Table can be

created), Control Change, Bulk In

Transmit: Program Change, Control Change, Bulk Out, Merge

Out

Controller Switch

A/D Converter

20 bit + 3 bit Floating

D/A Converter

20 bit

Sampling Frequency

48 kHz

Memory Allocations

Preset: 90
User: 90

Input Level/Impedance

INPUT HIGH: -25dBm/1M ohm
INPUT LOW: -15dBm/1M ohm
POWER AMP IN: 0 dBm/100k ohm

Output Level/Impedance

LINE OUT L/MONO, R: -3dBm/2.3k ohm
PHONES: 0dBm/47 ohm (47ohm load)
SPEAKER: 60W RMS/8 ohm

Power

U.S. and Canadian models : 120V, 60Hz
General model : 230V, 50Hz

Top Panel

Push Switch x17

UP, DOWN, MANU AL, UTILITY, ST ORE, COMP, CHOR US,
FLANGER, PHASER, ROTAR Y, TREMOLO , DELAY, TAPE
ECHO, SPRING, HALL, PLATE, SP. SIM

Knob x15

AMP SELECT , GAIN, MASTER, TREBLE, MIDDLE, BASS,
PRESENCE, COMP, SPEED , DEPTH, TIME, FEEDBA CK,
LEVEL, REVERB, OUTPUT

Rear Panel

Push Switch x1

POWER

Display

7 Segment LED (3 digit) x1
Push Switch LED x17

Connections/Jacks

INPUT HIGH, LOW: Standard Monaural Phone Jack
LINE OUT L/MONO, R: Standard Monaural Phone Jack
PHONES: Standard Stereo Phone Jack
POWER AMP IN: Standard Monaural Phone Jack
Foot Switch Unit Terminal: 13 pin DIN
DIGITAL OUT: COAXIAL
MIDI IN, MIDI OUT: 5 pin DIN

Power Consumption

70 W

Dimensions (WxHxD)

513 x 491 x 291 mm (20.2” x 19.3” x 11.5”)

Weight

17 kg (37 lbs 8 oz)

Accessories

Foot Switch Unit
Foot Switch Special Cable
Owner’s Manual
Patch List

Foot Switch Unit

Footswitch x4 (1, 2, 3, BANK)
LED x6 (1, 2, 3, BANK x3)
Connections/Jacks

EXP. PEDAL: Standard Stereo Phone Jack
Connects main unit and foot switch: 13 pin DIN

Dimensions (WxHxD) : 280 x55 x108 mm

(11.0” x 2.2” x 4.3”)

Weight : 930 g (2 lbs 1 oz)

3

DG60FX-112

4

PANEL LAYOUT

Control Panel

DG60FX-112

14

24201711 129 151310

8
7

1 2 43

Input Jacks (INPUT HIGH, LOW)

1

Peak Indicator

2

Amp Select Switch (LEAD1-CLEAN2)

3

Gain Control (GAIN)

4

Master V olume (MASTER)

5

Tone Controls

6

(TREBLE, MIDDLE, BASS, PRESENCE)
Output Level Control (OUTPUT)

7

Speaker Simulator Button (SP. SIM)

8

Up Button (UP)

9

Down Button (DOWN)

10

Display

11

Manual Button (MANUAL)

12

Utility Button (UTILITY)

13

Store Button (STORE)

14

Compressor Button (COMP)

15

Compressor Knob (COMP)

16

Modulation Group Effect Buttons

17

(CHORUS/FLANGER/PHASER
/ROTARY/TREMOLO)
Speed Knob (SPEED)

18

Depth Knob (DEPTH)

19

Delay Group Effect Buttons

20

(DELAY/TAPE ECHO)
Time Knob (TIME)

21

Feedback Knob (FEEDBACK)

22

Level Knob (LEVEL)

23

Reverb Group Effect Buttons

24

(SPRING/HALL/PLATE)
Reverb Knob (REVERB)

25

5 6

5

DG60FX-112

Rear Panel

26
27
28
29
30
31
32
33

26 27 2928 30

31 32 33

Power Switch (POWER)
Headphones Jack (PHONES)
Line Out Jacks (LINE OUT R, L/MONO)
POWER AMP IN Jack
Foot Switch Unit Terminal (FOOT SW)
MIDI OUT Jack
MIDI IN Jack
Digital Out Jack (DIGITAL OUT)

Foot Switch Unit

Top Panel

34 35

Foot Switches 1, 2, 3

34

Bank Switch (TAP/BANK/TUNER)

35

EXP Pedal Jack (EXP. PEDAL)

36

Unit Terminal

37

Rear panel

36 37

6

4/8 7/8 6/8 5/8

1/8

2/8

3/8

(PN1/2)

MAIN MAIN MAIN MAIN

MAIN

DM

MAIN

MAIN

FRONT

(ANALOG8/8)REAR

(PN2/2)SW, LED

CIRCUIT BOARD LAYOUT

DG60FX-112

Foot Switch

7

DG60FX-112

BLOCK DIAGRAM

A

MAIN

DM

FRONT

3/8

IC401 IC402

IC1

-

W401

(

DM-CN1

(

FRONT-CN304

+

57 57

IC401

+

13

(PN1/2)

CN101

)

IC102

-

21

IC103

­1

2

IC2,IC3

)

IC102

-

67

IC103

6-7

IC9 IC8

CN103

IC104

IC12

(

DM-CN2

(

FRONT-CN303

)

FRONT

IC10,IC11

)

CN103

CN102

A'

8

DG60FX-112

A

FRONT

10,IC11

CN103

CN102

MAIN

W502

(

DM-CN3

(

FRONT-CN302

(1/8, 2/8, 4/8~7/8)

)

)

IC501

+

75

IC501

+

31

IC502

+

13

IC502

+

57

A'

SW, LED

REAR

W701

CN306

KEC-54207

9

DG60FX-112

WIRING

MAIN MAIN MAIN MAIN

4/8 7/8

W602

W609

6/8

W607

5/8

W605

AC

CN603

CN602

CN601

POWER

TRANSFORMER

MAIN

W502 W501

2/8

MAIN

1/8

W612

SPEAKER

W608

W503

W606
W604

W601

W610

CN607

W603

W611

CN4

CN1 CN2 CN3

CN104

DM

CN102

CN103

CN101

10

CN304 CN303 CN302 CN305

CN301

FOOT SWITCH OVERALL ASSEMBLY

SW, LED

(PN2/2)

FRONT

(PN1/2)

W701CN306

REAR

(ANALOG8/8)

CN401 W401

3/8

MAIN

DISASSEMBLY PROCEDURE

A. External components

1. Handle Assembly

1-1. Remov e the two (2) screws marked [70]. The handle

assembly can then be removed. (Fig. 1)

2. Corner fitting

2-1. Remov e the two (2) screws mark ed [50]. The corner

fitting can then be removed. (Fig. 1)

3. Leg

3-1. Remove the screw marked [110]. The leg can then

be removed. (Fig. 1)

[50]

DG60FX-112

[50]

[70]

[50]: Oval Head Tapping Screw 3.5X16 MFNI33 (V383360)
[70]: Oval Head Screw 0X25 FNM3-2B (V374370)
[110]: Truss Head Tapping Screw-1 4.0X20 MFZN2BL (O374729)

[110]

Fig.1

11

DG60FX-112

4. Removal of stereo amplifier unit

4-1. Remove the four (4) screws marked [80] and the

four (4) washers marked [90] from the back plate
and then remove the back plate. (Fig. 2)

4-2. Remove the six (6) screws marked [30] and the six

(6) washers marked [40] from the top of the main
unit. The pre main unit can then be removed. (Fig. 2)

5. Removal of speaker

5-1. Remov e the pre main unit. (See Procedure 4.)
5-2. Remove the four (4) screws marked [70]. The

speaker can then be removed. (Fig. 2)

[70]

[80]
[90] [90]

[30]: Oval Head Screw 5.0X35 MFC2BL (V374938)
[40]: Washer 5S MFC2BL (EW30002)
[70]: Hexagonal Nut 4.0 MFZN2Y (O376090)
[80]: Oval Head Tapping Screw 4.0X30 MFC2BL (V374940)
[90]: Washer 4S MFC2BL (V389020)

[80]

[70]

Fig.2

B. Pre main unit

6. FR ONT circuit board (PN 1/2), MAIN circuit board (3/8)

6-1. Remov e the pre main unit. (See Procedure 4.)
6-2. Remove the five (5) screws marked [110] and then

remove the panel. (Fig. 3)

6-3. Remove the seven (7) screws marked [290], eight

(8) knobs marked [310], fifteen (15) hexagonal nuts,
three (3) screws marked [50]. The FRONT circuit
board (PN 1/2) can then be removed. (Fig. 3)

6-4. Remove the two (2) hexagonal nuts marked [210]

and the two (2) flat washers marked [220]. The MAIN
circuit board (3/8) can then be removed. (Fig. 3)

[30]
[40]

[30]
[40]

12

MAIN

DG60FX-112

4/8 7/8 6/8 5/8

MAIN MAIN MAIN MAIN

DM

1/8

[110]

[50]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[110]: Bind Head Tapping Screw-C A4.0X8 MFZN2BL (VC688900)
[210]: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060)
[220]: Flat Washer 9X14 0.5 FNM3 (VL802300)

7. DM, MAIN circuit boards (1/8, 2/8, 4/8, 5/8, 6/8, 7/8), heat sink

7-1. Remov e the pre main unit. (See Procedure 4.)
7-2. Remove the panel. (See Step 6-2.)
7-3. Remove the four (4) hexagonal nuts marked [140]

and four (4) screws marked [50A]. The MAIN circuit
board (2/8) can then be removed. (Fig. 4)

7-4. Remove the five (5) screws marked [50B] and the

three (3) screws marked [55] from the rear panel.
The DM circuit board can then be removed. (Fig. 4)

7-5. Remov e the four (4) scre ws marked [50C]. The MAIN

circuit board (1/8) can then be removed. (Fig. 4)

7-6. Remove the f our (4) scre ws marked [130]. The MAIN

circuit boards (4/8, 5/8, 6/8, 7/8) can then be
removed. (Fig. 4)

7-7. Remov e the four (4) screws marked [110A]. The heat

sink can then be removed. (Fig. 4)

Fig.3

[290][310][290][290]

[210]
[220]

MAIN 3/8

[50]

FRONT (PN1/2)

[110]

13

DG60FX-112

8. Power transformer

8-1. Remov e the pre main unit. (See Procedure 4.)
8-2. Remove the panel. (See Step 6-2.)
8-3. Remove the four (4) screws marked [110B]. The

transformer can then be removed. (Fig. 4)

[110B] [110A] [50B][130] [110A] [130] [110A] [130] [110A] [130]

Power

Transformer

[50C]

Rear panel

MAIN 1/8

[50C]

MAIN 2/8

[50B]

[50C]

[140] [140]

[50A] [50A] [55]

[50]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[55]: Bind Head Tapping Screw-P 3.0X12 MFZN2BL (VC161100)
[110]: Bind Head Tapping Screw-C A4.0X8 MFZN2BL (VC688900)
[130]: Bind Head Screw SP 3.0X12 MFZN2Y (VB763800)
[140]: Hexagonal Nut 12.0 14X2 MFC2BL (VD794100)

[50B]

DM

14

Fig.4

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.

C. Foot switch

9. Foot switch

9-1. Remove the six (6) scre ws mark ed [110A] and then

remove the bottom plate. (Fig. 5)

9-2. Remove the two (2) screws marked [110B] and

hexagonal nuts marked [90] and then remove the
REAR circuit board (MAIN 8/8). (Fig. 5)

9-3. Remove the four (4) hexagonal nuts from the foot

switch. The SW , LED circuit board (PN2/2) can then
be removed. (Fig. 5)

[110A]

DG60FX-112

[110A]

View A

[110B]

[90]

[110A]

[110A]

REAR (MAIN 8/8)

SW, LED

(PN2/2)

Foot switch

Hexagonal nut Hexagonal nut

[90]: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060)
[110]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

Fig.5

15