Yamaha DG60-112 User manual

GA 011476
19990901-65000
SERVICE MANUAL
HAMAMATSU, JAPAN
1.615K-455 Printed in Japan '99.08
GUITAR AMPLIFIER
CONTENTS
SPECIFICATIONS····································································· 3
PANEL LAYOUT········································································ 4
CIRCUIT BOARD LAYOUT······················································· 5
BLOCK DIAGRAM····································································· 6
DISASSEMBLY PROCEDURE·················································· 6
LSI PIN DESCRIPTION····························································· 8
IC BLOCK DIAGRAM ······························································ 10
SELF CHECK AND INSPECTIONS ········································ 12
PARTS LIST
OVERALL CIRCUIT DIAGRAM
CIRCUIT BOARDS

DG60-112
2
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.
IMPORTANT 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.
IMPORTANT: 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.
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
accumulated by grounding yourself to the ground bus in the unit. (Heavy gauge black wires connect to this
bus.)
IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the
unit.
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT. The wires in this main lead are coloured in
accordance with the following code:
GREEN-AND-YELLOW: EARTH
BLUE: NEUTRAL
BROWN: LIVE
As the colours of the wires in the main lead of this apparatus may not
correspond with the coloured markings identifying the terminals in
your plug, proceed as follows:
The GREEN-and-YELLOW wire must be connected to the terminal in
the plug that is marked with the letter E or the safety earth symbol (or
colored GREEN or GREEN-and-YELLOW).
The BLUE wire must be connected to the terminal that is marked with
the letter N (or coloured BLACK).
The BROWN wire must be connected to the terminal that is marked
with the letter L (or coloured RED).
This applies only to products diatributed by Yamaha Kemble Music (U.K.) Ltd.

SPECIFICATIONS
DG60-112
3
Digital Section
Complete Digital Signal Processing
Amplification Type: Internal 8 Channel Preset
Digital Reverb (SPRING)
Speaker Simulator (LINE OUT)
Analog Section
60 W Solid State Power Amp
30 cm Speaker (EMINENCE) x 1
Controller/Switch
Front Panel:GAIN, MASTER, TREBLE, HIGH MID, LOW MID,
BASS, PRESENCE, REVERB, AMP select switch,
for each channel (A/B), Channel select switch (A/B)
Rear Panel: EFFECT BLEND, SP MUTE switch, for each
channel (A/B), EFFECT SEND/RETURN level switch
Indicator
Peak Level Display LED (Red)
Connection Jacks
INPUT HIGH/LOW, EFFECT SEND/RETURN, LINE
OUT/PHONES, FOOT SW (CH SELECT, REVERB):
All Standard Phone Mono Jack
A/D Converter 20 bit + 3 bit floating
D/A Converter 20 bit
Sampling Frequency 48 kHz
Input Level/Impedance
INPUT HIGH: –20 dBm (THRU)/1 MΩ
INPUT LOW: –10 dBm (THRU)/1 MΩ
EFFECT RETURN: 0 dBm/120 kΩ
Output Level/Impedance
SPEAKER: 60 W RMS/8 Ω
LINE OUT: +2 dBm/47 Ω
EFFECT SEND: –2 dBm/1 kΩ
Power Requirements
U.S. and Canadian models : 120 V, 60 Hz
General model : 230 V, 50 Hz
Power Consumption
70 W
Dimensions (W x H x D)
540 x 504 x 276 mm (21.3” x 19.8” x 10.9”)
Weight18.0 kg (39 lbs 11 oz)

DG60-112
4
PANEL LAYOUT
Input Jack (INPUT HIGH, LOW)
Peak Indicator
Channel Select Switch
Channel Indicator
Amp Select Switch
Gain Volume (GAIN)
Master Volume (MASTER)
Tone Controls
(TREBLE, HIGH MID, LOW MID, BASS, PRESENCE)
Reverb Volume (REVERB)
Power Switch (POWER)
Foot Switch (FOOT SW)
Speaker Mute Switch (SP MUTE)
Line Out/Head Phone Jack
(LINE OUT/PHONES)
Effect Send/Return Level Switch
(0 dB/-20 dB)
Effect Send Jack (EFFECT SEND)
Effect Return Jack (RETURN)
Blend Knob (BLEND)
Front Panel
Rear Panel

DM
DM
SW
SW
DM
MAIN
(Bottom)
(Top)
1/5
MAIN 1/5
MAIN 1/5
MAIN 2/5 MAIN 3/5 MAIN 4/5 MAIN 5/5
A-CH
A-CH
Power transformer
AC cord
• Top view
• Front view
• Rear view
• Side view
DG60-112
5
CIRCUIT BOARD LAYOUT

DM
SW
MAIN
INPUT
HIGH
INPUT
LOW
PEAK
ACH BCH
IC201
JK202 JK201 IC202 IC1
IC2
97
IC201
LD201
84 81
3
12
AMP SELECT (SW401)
GAIN (VR302)
MASTER (VR303)
TREBLE (VR304)
HIGH MID (VR305)
LOW MID (VR306)
BASS (VR307)
PRESENCE (VR308)
REVERB (VR309)
AMP SELECT (SW402)
GAIN (VR202)
MASTER (VR203)
TREBLE (VR204)
HIGH MID (VR205)
LOW MID (VR206)
BASS (VR207)
PRESENCE (VR208)
REVERB (VR209)
14 15 11 1 5 2 4 12 14 15 11 1 5 2 4
13
80 85 83
313
82
31
47 21
21
67 31
526 7
5727
MUTE IC4 MUTE MUTE
MUTE
BLEND
IC6
VR1
75
IC6
JK4
SW3 SW2 98 TEST
SP MUTE
BUF
(IC21)
9795,966,7
9,122,5
4711 14
JK5
SW202
BCH
LD402LD401
ACH
31
EFECT DRY
MUTE
CH SELECT A/B REVERB ON/OFF
+B/-B
+15V/-15V
+5V
MUTE
IC5 31
IC5
3+R
-R A/D -L
R
D/A
L
+L
4
67
4
5 6
AK4520A-VF-E2
ADC/DAC
DSP3
YSS228E-F
(IC14)
MPX
(IC19) MPX
(IC20)
CPU HD6473042FP16 (IC17)
DSP2
YSS228E-F
(IC15)
DRAM
4M
(IC16)
(IC3)
LINE
OUT/HEAD
PHONES
SEND
PUSH SW.
RETURN
SP '12
8
AC
POWER
SW
0/-20 dBm
JK3 JK2
SW1
JK1
BT202
D201,202
POWER
AMP
BT203
SW201
PUSH SW.
CH A/B
KEC-54180
POWER
SUPPLY
A-CH
BLOCK DIAGRAM DISASSEMBLY PROCEDURE
DG60-112
6
[30]: Oval Head Screw 5.0X35 MFC2BL (VP104600)
[60]: Hexagonal Nut 4.0 MFZN2Y (03760900)
[70]: Oval Head Yapping Screw-1 4.0X30 MFC2BL (EN240090)
(Fig. 1)
[70]
[120]
[30]
[60]
Pre-main unit
Back board (U)
Speaker
Speaker wire
Speaker
1. Pre-Main Unit
1-1 Remove the four (4) screws marked [70]. The back board
(U) can then be removed. (Fig. 1)
1-2 Remove the speaker wires and the screw marked [120].
(Fig. 1)
1-3 Remove the four (4) screws marked [30]. The pre-main
unit can then be removed by sliding it backward. (Fig. 1)
2. Speaker
2-1 Remove the four (4) screws marked [70]. The back board
(U) can then be removed. (Fig. 1)
2-2 Remove the four (4) hexagonal nuts marked [60]. The
speaker can then be removed. (Fig. 1)
3. DM Circuit Board
3-1 Remove the pre-main unit. (See Procedure 1.)
3-2 Remove the BLEND knob marked [90A], the four (4)
hexagonal nuts marked [130A], the hexagonal nut marked
[190] and the hexagonal nut marked [210].
3-3 Remove the five (5) screws marked [80A]. The DM
circuit board can then be removed. (Fig. 2)
3-4 Remove the button marked [100A] form the DM circuit
board. (Fig. 2)

SW
2/5 3/5 Power transformer
[80]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[130]: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060)
[190]: Hexagonal Nut 12.0 14X2 MFC2BL (VD794100)
[210]: Hexagonal Nut 9.0 11X2 MFZN2BL (VJ388000)
[270]: Bind Head Tapping Screw-C A4.0X8 MFZN2BL (VC688900)
[290]: Bind Head Screw SP 3.0X12 MFZN2Y (VB763800)
(Fig. 2)
[210]
[80A]
[90A] [130A] [130A] [290A] [100A][190]
[290B] [290C] [290D]
[270]X4
[80B]
[90C], [B]
MAIN MAIN
MAIN 5/5
MAIN 4/5
[90B], [A][90D], [A][100B] [110][130B]
[80B]
DM
MAIN 1/5
A-CH
DG60-112
7
4. MAIN (1/5-5/5), A-CH and SW Circuit
Boards
4-1 Remove the pre-main unit. (See Procedure 1.)
4-2 Each circuit board can then be removed in its manner as
below. (Fig. 2)
MAIN 1/5 Circuit Board
Remove the eight (8) knobs marked [90B], the eight (8)
hexagonal nuts marked [A], the two (2) hexagonal nuts
marked [130B] and the five (5) screws marked [80B].
Remove the knob marked [100B] and the knob marked [110]
from the MAIN 1/5 circuit board. (Fig. 2)
MAIN 2/5 Circuit Board
Remove the screw marked [290A]. (Fig. 2)
MAIN 3/5 Circuit Board
Remove the screw marked [290B]. (Fig. 2)
MAIN 4/5 Circuit Board
Remove the screw marked [290C]. (Fig. 2)
MAIN 5/5 Circuit Board
Remove the screw marked [290D]. (Fig. 2)
A-CH Circuit Board
Remove the eight (8) knobs marked [90C] and the eight
(8) hexagonal nuts marked [B]. (Fig. 2)
SW Circuit Board
Remove the two (2) knobs marked [90D] and the two
(2) hexagonal nuts marked [C]. (Fig. 2)
5. Power Transformer
5-1 Remove the pre-main unit. (See Procedure 1.)
5-2 Remove the four (4) screws marked [270]. The power
transformer can then be removed. (Fig. 2)

DG60-112
8
LSI PIN DESCRIPTION
PIN
NO. I/O FUNCTIONNAME PIN NO. I/O FUNCTIONNAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
PA6
PA7
VCC
PB0
PB1
PB2
PB3
PB4
PB5
PB6//DREQ0
PB7//DREQ1
/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
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
Port A
Address bus
Power supply
Port B
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)
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
A12
A13
A14
A15
A16
A17
A18
A19
VSS
P60//WAIT
P61//BREQ
P62//BACK
Ø
/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
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
Address bus
Ground
Port 6
Ø 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
Port A
HD6433042SC10FP (XW325100) CPU DM: IC17

PIN
NO. I/O FUNCTIONNAME PIN NO. I/O FUNCTIONNAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
VSS
XI
XO
VDD
/SYNCI
/SYNCO
CKI
CKO
CKSL
VSS
MCKS
/SSYNC
/IC
/TEST
BTYP
/IRQ
TRIG
VDD
VSS
/CS
/DS
R/W
CA7
CA6
CA5
CA4
CA3
CA2
CA1
CA0/CD15
CD14
CD13
CD12
CD11
CD10
CD09
CD08
CD07
CD06
VSS
VDD
CD05
CD04
CD03
CD02
CD01
CD00
/DTACK
SI0
SI1
SI2
SI3
SI4
SI5
SI6
SI7
VSS
VDD
SO0
SO1
SO2
SO3
SO4
SO5
SO6
SO7
DB00
DB01
DB02
DB03
DB04
DB05
DB06
DB07
DB08
DB09
DB10
DB11
DB12
VDD
I
I
O
I
O
I
I
I
I
I
I
O
I/O
I
I
I
I
I
I
I
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
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
Ground
System master clock input (60 M or30 MHz)
System master clock input (60 M or30 MHz)
Power supply
System synch. input
System synch. output
System clock input (30 MHz)
System clock output (30 MHz)
System master clock select (0:60 M,1:30 MHz)
Ground
Master clock for serial I/O(128 xFs)
Synch. signal for serial I/O
Initial clear
Test mode setting
CPU data bus 8/16 bit select(0:8,1:16)
Interrupt request
Trigger signal
Power supply
Ground
Chip select
Data strobe
Read/Write select
CPU address bus
CPU address/data bus
CPU data bus
Ground
Power supply
CPU data bus
DTACK signal output
Serial data input
Ground
Power supply
Serial data output
Parallel data bus
Power supply
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
VSS
DB13
DB14
DB15
DB16
DB17
DB18
DB19
DB20
DB21
DB22
DB23
DB24
DB25
DB26
DB27
DB28
DB29
DB30
DB31
TIMO/DBOE
VSS
VDD
DA00
DA01
DA02
DA03
DA04
DA05
DA06
DA07
DA08
DA09
DA10
DA11
DA12
DA13
DA14
DA15
VSS
VDD
DA16
DA17
DA18
DA19
DA20
DA21
DA22
DA23
DA24
DA25
DA26
DA27
DA28
DA29
DA30
DA31
VDD
VSS
A00
A01
A02
A03
A04
A05
A06
A07
A08
A09
A10
A11
A12
A13
A14
A15/RAS
A16/CAS
A17/CE
/WE
/OE
VDD
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
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
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Ground
Parallel data bus
Timing signal/Parallel data bus control
Ground
Power supply
External memory data bus
Ground
Power supply
External memory data bus
Power supply
Ground
External memory address bus
External memory address bus/Row address strobe
External memory address bus/Column address strobe
External memory address bus/Chip enable
External memory write enable
External memory output enable
Power supply
YSS228E-F (XQ962D00) DSP3 (Digital Signal Processor) DM: IC14, 15
DG60-112
9

DG60-112
10
IC BLOCK DIAGRAM
TCHCU04AF-TP1 (XD660A00)
Hex Inverter SN74HC08NSR (XD831A00) Quad 2 Input AND
1
2
3
1A
1Y
42A
52B
62Y
7VSS
1B
14
13
12
VDD
4A
11 4Y
10 3B
93A
83Y
4B
1
2
3
A
QA QA
4QB QB
5QC QC
6QD QD
7GND
BB
14
13
12
VCC
QGQG
11 QFQF
10 QEQE
9 CLEARCLEAR
8 CLOCK
QH
CK
QH
1
2
3
1A
1Y
42A
52B
62Y
7GND
1B
14
13
12
Vcc
4A
11 4Y
10 3B
93A
83Y
4B
TC74VHC32F (XR337A00)
Quad 2 Input OR
TC74HC157AF-TP1 (XH603A00)
Quad 2 to 1 Multiplexer
TC74HC175AF -TP1 (XD658A00)
Quad D-Type Flip-Flop
TC74HC164AF (XQ967A00)
8-Bit Shift Register
QCL
QD
CK
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
Vss
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
QCL
QD
CK QCL
QDCK
QCL
QDCK
1
2
3
4
5
6
7
CL
1Q
1Q
1D
2D
2Q
2Q
16
15
14
13
12
11
10
VDD
4Q
4Q
4D
3D
3Q
3Q
8
Vss 9CK
OUTPUTS
OUTPUTS
SIRIAL
INPUT A
A
1
2
3
4
5
6
7
SELECT
1A 1A
1B 1B
1Y 1Y
2A 2A
2B 2B
2Y 2Y
16
15
14
13
12
11
10
Vcc
STROBEG
4A
S3Y
4A
4B4B
4Y4Y
3A3A
3B3B
8
GND 93Y
DM: IC 11 DM: IC 12 DM: IC 13
DM: IC 9DM: IC 21 DM: IC 10
PIN
NO. I/O FUNCTIONNAME PIN NO. I/O FUNCTIONNAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VREFH
VREFL
AINR+
AINR-
AINL+
AINL-
VA
AGND
DIF0
DIF1
LRCK
SCLK
SDTI
SDTO
I
I
I
I
I
I
-
-
I
I
I
I
I
O
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
15
16
17
18
19
20
21
22
23
24
25
26
27
28
MCLK
DEM0
DEM1
TST3
TST2
TST1
VD
DGND
/PWDA
/PWAD
CMODE
AOUTL
AOUTR
VCOM
I
I
I
I/O
I/O
I
-
-
I
I
I
O
O
O
Master Clock Input
De-emphasis Frequency Select
De-emphasis Frequency Select
Test Pins (Pull Down Pins)
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
AK4520A-VF-E2 (XT802A00) ADC & DAC MAIN: IC301

DG60-112
11
TC74HC4052AF (XS790A00)
Differential 4-Channnel
Multiplexer/Demultiplexer
1
2
3
4
5
6
7
0Y
2Y 2Y
Y-COM Y-COM
3Y 3Y
1Y 1Y
INH INH
VEE
16
15
14
13
12
11
10
VDD
2X2X
1X
0Y B
1X
X-COMX-COM
0X0X
3X3X
AA
8
VSS 9B
DM: IC 19, 20
TC74HC4040F (XR684A00)
12-Stage Binary Ripple Counter
CK
1
2
3
4
5
6
7
Q12 Q12
Q6 Q6
Q5 Q5
Q7 Q7
Q4 Q4
Q3 Q3
Q2 Q2
16
15
14
13
12
11
10
VDD
Q11Q11
Q10Q10
Q8Q8
Q9Q9
CLRCL
Input Pulses ( )
8
Vss 9Q1Q1
DM: IC 8
NE5532P (IG102500)
NJM4556AD (XQ824A00)
Dual Operational Amplifier
1
2
3
4-V
8
7
6
5
Output A +V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
DM: IC 1, 2, 4–6
NJM072D (IG107000)
Dual Operational Amplifier
1
A
23456789
+V -IN -V
+INOUT
AAA
+V-IN
+IN OUT
BBB
-
+
B
-
+
MAIN: IC 201, 202

DG60-112
12
SELF CHECK AND INSPECTIONS
PREPARATIONS
1. If no specific frequency is required, set the test frequency at 1 kHz.
2. Before turning the [POWER] switch on, set the Idling Adjustment Volume (VR201, 1 k ohms) on the MAIN circuit
board at minimum.
3. Before turning the [POWER] switch on, set all the knobs at the center position.
SELF CHECK MODE
SET-UP: While pressing the SW2 switch on the DM circuit board, turn the [POWER] switch on. The self check mode
program will be started.
0. LED Check
When the DG60-112 enters the self check mode, the LED check is started and the LEDs light automatically as the
check follows the circular sequence below, while pressing the SW2 switch.
When the SW2 switch on the DM circuit board is released, the check will proceed to the next SW check after all
LEDs light-up and the LED check is finished.
1. SW Check
CHANNEL SELECT SWITCH (A/B)
If the channel select switch is turned on (selected B ch) when a plug is not inserted into the CH SELECT jack
(JK5), A ch LED will light.
CH SELECT (JK5)
When a plug is inserted into the CH SELECT jack (JK5), the channel select function will go out and the A ch
LED will light. Removing the plug will make the A ch LED go out.
REVERB (JK4)
When a plug is inserted into the REVERB jack (JK4), B ch LED will light. Removing the plug will make the B ch
LED go out.
SP MUTE (SW3)
When the SP MUTE switch (SW3) is pressed, both the A ch and B ch LEDs will go out.
When the SW2 switch on the DM circuit board is pressed, the check will proceed to the next Volume check after all
the LEDs light-up and the SW check is finished.
2. Volume Check
This volume check can be tested in the order below from 1 to 18.
1. A ch AMP SELECT (CN3–1 pin)
2. A ch GAIN (CN3–2 pin)
3. A ch MASTER (CN3–3 pin)
4. A ch TREBLE (CN3–4 pin)
5. A ch HIGH MID (CN3–5 pin)
6. A ch LOW MID (CN3–6 pin)
7. A ch BASS (CN3–7 pin)
8. A ch PRESENCE (CN3–8 pin)
9. A ch REVERB (CN3–9 pin)
10. B ch AMP SELECT (CN4–1 pin)
11. B ch GAIN (CN4–2 pin)
12. B ch MASTER (CN4–3 pin)
13. B ch TREBLE (CN4–4 pin)
14. B ch HIGH MID (CN4–5 pin)
15. B ch LOW MID (CN4–6 pin)
16. B ch BASS (CN4–7 pin)
17. B ch PRESENCE (CN4–8 pin)
18. B ch REVERB (CN4–9 pin)
all LEDs on all LEDs off A ch LED on B ch LED on all LEDs off

DG60-112
13
When fully turning the check volume knob counterclockwise, the A ch LED (CN5–2 pin) will light; when fully
turning it clockwise, the B ch LED (CN5–3) will light. If the volume is no good, both the A ch and B ch LEDs
(CN5–2, 3 pin) will light to indicate the error.
Each press of the switch (SW2) will proceed to the next volume check after lighting both the A ch and B ch LEDs.
Press the switch (SW2) after finishing the volume checks to proceed to the next Sound Check. When cancelling a
test during a check, hold down on the switch (SW2) for a few seconds. The A ch and B ch LEDs will then go out, re-
light, then the test will be cancelled.
3. Sound Check (Power Amplifier Adjustment)
3-1 Idling Adjustment
1) Before turning the [POWER] switch on, set the Idling Adjustment Volume (VR201, 1 k ohms) on the MAIN
circuit board at minimum.
2) Press the channel select switch and select the B ch.
3) Connect an 8 ohm load between the speaker terminals BT202 and BT203.
4) Set the B ch MASTER volume at minimum.
5) After turning the POWER switch on, adjust the Idling Adjustment Volume (VR201) to set the voltage of the
terminals of the CN204 or R252 at 5 mV +/- 1 mV.
3-2 Sound Check
This Sound Check is performed by using a signal that goes through the following circuits: the analog circuit, the
A/D converter, the DSP-3 and the D/A converter.
This check should be performed after the VOLUME check has finished and when both the A ch and B ch LEDs
(CN5–2, 3) are lit.
* 0 dBm = 0.775 V
When Sound Check is completed, turn the [POWER] switch off to quit the self check mode.
CN204 T·P T·P
0.33 5W
R252
1
2
3
4
5
6
7
8
9
10
Input Sensitivity
(High)
Input Sensitivity
(Low)
RETURN Level
(0 dB)
RETURN Level
(-20 dB)
SEND Level
(0 dB)
SEND Level
(-20 dB)
Frequency Response
(HIGH IN)
Remain Noise
Sensitivity of LED for Input
Level
Output
1 kHz, -20 dBm, 8 ohms load
1 kHz, -10 dBm, 8 ohms load
1 kHz, -2 dBm,
8ohms load (SW1: 0 dB)
1 kHz, -22 dBm,
8ohms load (SW1: 20 dB)
1 kHz, -20 dBm,
100 kohms SEND load (SW1: 0 dB)
1 kHz, -20 dBm,
100 kohms LINE OUT load
-30 dBm Input, 1 kHz standard
SP Output Terminals: 8 ohms load
TRIM, OUTPUT
VR MIN IHF A net
1 kHz, -10 dBm,
8 ohms load
RETURN, 10 %THD
+25 dBm +/-2 dB
+25 dBm +/-2 dB
+28 dBm +/-2 dB
+28 dBm +/-2 dB
-3 dBm +/-2 dB
+2 dBm +/-2 dB
100 Hz: -0.5 +/-1 dB
10 kHz: -0.5 +/-1 dB
Less than -60 dBm
-10 dBm Input: no light
+50 dBm Input: lit
More than +28 dBm
(50 W) 8 ohms load
Items Conditions Responses (standards)

GUITAR AMPLIFIER
CONTENTS
OVERALL ASSEMBLY ··········································································································································2
PRE-MAIN UNIT ····················································································································································4
OVERALL CABINET ASSEMBLY··························································································································6
ELECTRICAL PARTS······································································································································7~12
PARTS LIST
•The numbers in “ QTY ” show quantities for each unit.
•The parts with “ - - ” in “ PART NO. ” are not available as spare parts.
•The mark “ ” in the remarks column indicates that these parts are interchangeable.
•The second letter of the shaded ( ) part number is O, not zero.
•The second letter of the shaded ( ) part number is I, not one.
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 (110 V)
W: General export model (220 V)
N,X:General export model
Y: Export model
Notes : DESTINATION ABBREVIATIONS
WARNING
Components having special characteristics are marked and must be replaced with parts having
specification equal to those originally installed.

DG60-112
2
OVERALL ASSEMBLY
Pre-main unit: See page 4.
Overall cabinet assembly: See page 6.
10
60
55
50
70
30
20
40
30
40
80 60
70
80
100
110
130
120
130
90
95

DG60-112
3
OVERALL ASSEMBLY
Overall Assembly
Overall Assembly
Overall Assembly
Overall Assembly
Pre-main Unit
Pre-main Unit
Pre-main Unit
Pre-main Unit
Overall Cabinet Assembly
Oval Head Screw
Washer
Speaker
Hexagonal Nut
Oval Head Tapping Screw-1
Washer
Name Plate
Truss Head Tapping Screw-1
Label
Connector Assembly
Bind Head Tapping Screw-C
Toothed Lock Washer-B
DESCRIPTION
10
10
10
10
20
30
40
50
60
70
80
90
95
100
110
120
130
REF NO.
- -
- -
- -
- -
- -
- -
- -
- -
V3691700
VP104600
EW300020
XW018A00
03760900
EN240090
VB890200
V2237300
V3623800
- -
- -
VC688900
ET900050
PART NO.
5.0X35 MFC2BL
5S MFC2BL
EMINENCE 1217F3831
4.0 MFZN2Y
4.0X30 MFC2BL
4S MFC2BL
3.0X10 FCM3-BL
SP frame
A4.0X8 MFZN2BL
4.0 MFZN2BL
DG60-112
J (V369020)
U (V369030)
H (V369040)
B (V369050)
J (V369130)
U (V369140)
H (V369150)
B (V369160)
(V374930)
(V374940)
U (VA03930)
U (V374010)
U
U
REMARKS
4
4
4
8
8
2
2
QTY RANK
*
*
*
*
01
01
09
03
01
*: New Parts RANK: Japan only

DG60-112
4
PRE-MAIN UNIT
80
80
80
51
90
90
90
52
53
10
20
80
80
170
180
90
210
200 190
130
290
290
140
280
260
270
270
220
160
100
150
250
240
237
295
236
235
230
130 140
125
125
120 110
280
100
U model: not used

DG60-112
5
PRE-MAIN UNIT
Pre-main Unit
Pre-main Unit
Pre-main Unit
Pre-main Unit
Chassis
Chassis
Chassis
Insulation Sheet
Circuit Board
Circuit Board
Circuit Board
Circuit Board
Bind Head Tapping Screw-B
Bind Head Tapping Screw-B
Volume Knob (CH)
Button (S)
Power Switch Knob
Escutcheon, Power Switch
Film, Power Switch
Hexagonal Nut
Flat Washer
Insulation Nut
Spacer
Circuit Board
Toothed Lock Washer-A
Hexagonal Nut
Flat Washer
Hexagonal Nut
Power Transformer
Power Transformer
Power Transformer
AC Cord
AC Cord
AC Cord
AC Cord
Pan Head Screw
Toothed Lock Washer-B
Isolation Sheet
Cord Strain Relief
Cord Strain Relief
Cord Strain Relief
Heat Sink
Bind Head Tapping Screw-C
Insulation Sheet
Bind Head Screw
Cord Holder
DESCRIPTION
10
10
10
20
51
51
52
53
80
80
90
100
110
120
125
130
140
150
160
170
180
190
200
210
220
220
220
230
230
230
230
235
236
237
240
240
250
260
270
280
290
295
REF NO.
- -
- -
- -
- -
V3692500
V3817700
V3817800
V3755700
AAX07370
AAX07380
AAX07370
AAX07380
EP600190
EP600190
V3694100
VZ429100
VU859000
VU859100
V4126900
LX200060
VL802300
V3630000
V3630100
V3732600
ET800150
VD794100
VB004700
VJ388000
XV965A00
XV966A00
XV967A00
VZ461100
VV205600
VV058200
VV058300
EL200020
ET900050
V4491100
VV103000
VV103100
V3634000
V3693100
VC688900
V3637600
VB763800
VV104600
PART NO.
MAIN
MAIN
A-CH
SW
3.0X8 MFZN2BL
3.0X8 MFZN2BL
GY
13X8X0.15
9.0 12X2 MFNI33
9X14 0.5 FNM33
DM
9.0 MFZN2Y
12.0 14X2 MFC2BL
12S MFC2BL
9.0 11X2 MFZN2BL
2X0.75 7A VCTF
3X#18 10A SJT
H05VV-F3X0.75 6A
H05VV-F3X0.75
SP 4.0X8 MFZN2Y
4.0 MFZN2BL
SR-5R1
SR-6P1
SR-4N-4 HEYCO
A4.0X8 MFZN2BL
T=0.15
SP 3.0X12 MFZN2Y
DG60-112
J (V369130)
U (V369140)
H (V369150)
B (V369160)
J
U
H,B
J,U
H,B
J,H,B
U
GAIN,...,REVERB,BLEND
A/B channel select switch
EFFECT SEND/RETURN level SW
POWER
J
U
H,B
J
U
H
B
U,H,B
U,H,B
J,H,B
J,H,B
U
REMARKS
13
12
19
2
2
6
6
2
2
4
8
2
4
4
QTY RANK
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
01
01
01
01
02
01
01
01
01
01
01
05
06
06
08
01
01
01
01
01
01
*: New Parts RANK: Japan only

DG60-112
6
OVERALL CABINET ASSEMBLY
Cabinet Assembly
Vinyl
Speaker Net
Corner Protector
Round Head Tapping Screw-1
Handle Assembly
Oval Head Screw
Screw
Truss Head Tapping Screw-1
Leg
Truss Head Tapping Screw-1
Shield Sheet
DESCRIPTION
10
15
25
30
40
50
55
67
70
90
100
110
REF NO. V3691700
- -
- -
- -
V3694400
V3833600
V3630300
V3743700
V3749500
03747400
VV085600
03747290
V3694800
PART NO.
3.5X16 MFNI33
5.0X25 FNM3-2B
4.0X40 MFC2BL
4.0X30 MFZN2Y
4.0X20 MFZN2BL
DG60-112 (V369420)
(V369430)
(V369860)
REMARKS
6
12
2
4
6
4
4
QTY RANK
*
*
*
*
*
*
*
01
01
01
OVERALL CABINET ASSEMBLY
*: New Parts RANK: Japan only
Handle assembly
55
55
70
70
70
40
30
40
25
67
90
10 15
50
110
100

DG60-112
7
ELECTRICAL PARTS
Circuit Board
Circuit Board
Circuit Board
Circuit Board
Circuit Board
Circuit Board
Electrolytic Cap.-BP
Ceramic Capacitor-SL
Mylar Capacitor
Mylar Capacitor
Ceramic Capacitor-SL
Mylar Capacitor
Electrolytic Cap.-BP
Ceramic Capacitor-SL
Ceramic Capacitor-SL
Mylar Capacitor
Electrolytic Cap.
Semiconductive Cera. Cap.
Electrolytic Cap.
Electrolytic Cap.
Semiconductive Cera. Cap.
Electrolytic Cap.
Semiconductive Cera. Cap.
Semiconductive Cera. Cap.
Electrolytic Cap.
Electrolytic Cap.-BP
Electrolytic Cap.
Ceramic Capacitor-SL
Electrolytic Cap.-BP
Ceramic Capacitor-B
Electrolytic Cap.-BP
Electrolytic Cap.-BP
Ceramic Capacitor-B
Electrolytic Cap.-BP
Electrolytic Cap.
Ceramic Capacitor-SL
Electrolytic Cap.-BP
Electrolytic Cap.-BP
Monolithic Ceramic Cap.
Ceramic Capacitor-SL
Electrolytic Cap.-BP
Electrolytic Cap.
Ceramic Capacitor-SL
Electrolytic Cap.-BP
Ceramic Capacitor-SL
Electrolytic Cap.-BP
Electrolytic Cap.-BP
Electrolytic Cap.
Semiconductive Cera. Cap.
Semiconductive Cera. Cap.
Electrolytic Cap.
Electrolytic Cap.
Electrolytic Cap.
Electrolytic Cap.
Electrolytic Cap.
Semiconductive Cera. Cap.
Semiconductive Cera. Cap.
Electrolytic Cap.
Monolithic Ceramic Cap.
Monolithic Ceramic Cap.
Monolithic Ceramic Cap.
Monolithic Ceramic Cap.
Electrolytic Cap.
Monolithic Ceramic Cap.
Electrolytic Cap.
Monolithic Ceramic Cap.
Monolithic Ceramic Cap.
Electrolytic Cap.
DESCRIPTION
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C14
-17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
C35
C36
C37
C38
C39
C40
C41
C42
C43
C44
C45
C46
C47
C48
C49
C50
-55
C56
C57
C58
C59
C60
C61
C62
-65
C66
C67
C68
C69
-72
C73
REF NO.
V3732600
AAX07370
AAX07380
AAX07370
AAX07380
V3732600
UN857100
FG651100
UA355100
UA355100
FG651220
UA353100
UN857100
FG651680
FG651220
UA353100
UR847100
VD930900
UR847100
UR847100
VD930900
UR847100
VD930900
VD930900
UR847100
UN857100
UR847100
FG651220
UN857470
FG613100
UN857100
UN857470
FG613100
UN857100
UR847100
FG651220
UN857100
UN857100
UB052100
FG651220
UN857100
UR847100
FG652100
UN857100
FG651220
UN857100
UN857100
UR847100
VD930900
VD930900
UR848100
UR848100
UR847100
UR847100
UR848100
VD930900
VD930900
UR848100
VJ899000
VJ899000
UB245100
UB245100
UR828100
UB245100
UR828100
UB245100
UB245100
UR828100
PART NO.
DM
MAIN
MAIN
A-CH
SW
DM
10.00 35.0V
10P 50V D
0.1000 50V J
0.1000 50V J
22P 50V J
1000P 50V J
10.00 35.0V
68P 50V J
22P 50V J
1000P 50V J
10.00 25.0V
0.1000 25V M
10.00 25.0V
10.00 25.0V
0.1000 25V M
10.00 25.0V
0.1000 25V M
0.1000 25V M
10.00 25.0V
10.00 35.0V
10.00 25.0V
22P 50V J
47.00 35.0V
1000P 50V K
10.00 35.0V
47.00 35.0V
1000P 50V K
10.00 35.0V
10.00 25.0V
22P 50V J
10.00 35.0V
10.00 35.0V
SL 100P 50V J
22P 50V J
10.00 35.0V
10.00 25.0V
100P 50V J
10.00 35.0V
22P 50V J
10.00 35.0V
10.00 35.0V
10.00 25.0V
0.1000 25V M
0.1000 25V M
100.00 25.0V
100.00 25.0V
10.00 25.0V
10.00 25.0V
100.00 25.0V
0.1000 25V M
0.1000 25V M
100.00 25.0V
CH 5P 50V C
CH 5P 50V C
F 0.100 25V Z
F 0.100 25V Z
100.00 10.0V
F 0.100 25V Z
100.00 10.0V
F 0.100 25V Z
F 0.100 25V Z
100.00 10.0V
DG60-112 (XV996A0)
J,U (XV964B0)
H,B (XV964B0)
(XV964B0)
(XV964B0)
(XV996A0)
REMARKS QTY
RANK
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
01
ELECTRICAL PARTS
*: New Parts RANK: Japan only