Yamaha DG80-112 User manual

GA 011459
19990301-148000
SERVICE MANUAL
HAMAMATSU, JAPAN
2.02K-186 Printed in Japan '99.02
GUITAR AMPLIFIER
CONTENTS
SPECIFICATIONS····································································· 3
PANEL LAYOUT········································································ 4
CIRCUIT BOARD LAYOUT······················································· 5
BLOCK DIAGRAM····································································· 6
DISASSEMBLY PROCEDURE·················································· 6
LSI PIN DESCRIPTION····························································· 9
IC BLOCK DIAGRAM ······························································ 12
CIRCUIT BOARDS·································································· 14
TEST PROGRAM···································································· 18
ERROR MESSAGES······························································· 21
MIDI IMPLEMENTATION CHART··········································· 22
PARTS LIST

DG80-112
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.
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 disassemble the batteries.
Never heat batteries or throw them into fire.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det
brugte batteri tilbage til leverandøren.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren.
Kassera använt batteri enligt fabrikantens instruktion.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty 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.
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 buss in the unit (heavy gauge black wires connect to this
buss.)
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.

SPECIFICATIONS
DG80-112
3
Digital Section
Complete Digital Signal Processing
Internal 8 Channel Preset
Digital Reverb (SPRING, HALL, PLATE)
Digital Tape Echo
Speaker Simulator (LINE OUT)
Analog Section
80 W (8 Ω) Solid State Power Amp
30 cm Speaker (Celestion G12H100) x 1
MIDI Function
Receive : Program change, Control Change (No. 7, 91, 94), Bulk In
Transmit : Bulk Out, Merge Out
Controller/Switch
Front Panel : TRIM, OUTPUT, GAIN, MASTER, TREBLE, HIGH
MID, LOW MID, BASS (TIME), PRESENCE (FEED
BACK), REVERB (LEVEL)
Rear Panel : LINE OUT volume, EFFECT BLEND
Switch : AMP SELECT (LEAD1, LEAD2, DRIVE1, DRIVE2,
CRUNCH1, CRUNCH2, CLEAN1, CLEAN2),
REVERB, MODE, , , STORE, RECALL
Display
AMP SELECT display LED x 8
MODE display LED x 3
REVERB type display x 3
7 segment LED x 2 digits
Indicator
Trim Level Display LED (Green)
Trim Clip Display LED (Red)
Connection Jacks
INPUT HIGH/LOW: Standard Phone Mono Jack
SPEAKER x2: Standard Phone Mono Jack
EFFECT SEND/RETURN: Standard Phone Mono Jack
LINE OUT: Cannon Jack
MIDI IN, MIDI OUT: 5 pin DIN
A/D Converter 20 bit
D/A Converter 20 bit
Sampling Frequency 48 kHz
Memory Number 128
Input Level/Impedance
INPUT HIGH: -30 dBm (THRU)/1 MΩ
INPUT LOW: -20 dBm (THRU)/1 MΩ
EFFECT RETURN: 0 dBm/120 kΩ
Output Level/Impedance
SPEAKER: 80 W RMS/8 Ω, 100 W RMS/4 Ω
LINE OUT: +4 dBm/600 Ω
EFFECT SEND: 0 dBm/2.2 kΩ
Power Requirements
U.S. and Canadian models : 120 V, 60 Hz
General model : 230 V, 50 Hz
Power Consumption 100 W
Dimensions (W x H x D) 542 x 510 x 284 mm (21.3” x 20.1” x 11.2”)
Weight 25.0 kg (55 lbs 2 oz)

Input Jacks (INPUT HIGH, LOW)
Trim Control (TRIM)
Output Level Control (OUTPUT)
Gain Volume (GAIN)
Master Volume (MASTER)
Tone Controls
(TREBLE, HIGH MID, LOW MID, BASS, PRESENCE)
Reverb Volume (REVERB)
Amp Select Button/Amp Select Display
(LEAD 1, 2/DRIVE 1, 2/CRUNCH 1, 2/CLEAN 1, 2)
Reverb Type Select Button (REVERB)
Reverb Type Display Lamp (SPRING, HALL, PLATE)
Mode Select Button (MODE)
Mode Display Lamp (AMP/TAPE ECHO/UTIL.)
Display
/ Buttons
Store Button (STORE)
Recall Button (RECALL)
Power Switch (POWER)
Speaker Jacks (SPEAKER1, 2 (EXT) )
MIDI OUT Jack
MIDI IN Jack
Effect Blend Control (EFFECT BLEND)
Effect Return Jack (EFFECT RETURN)
Effect Send Jack (EFFECT SEND)
Line Out Jack (LINE OUT)
Line Out Level Control (LINE OUT LEVEL)
Speaker Plug
DG80-112
4
PANEL LAYOUT
Front Panel
Rear Panel

DM
ANR
ANF2
1/5MAIN
AC cord
Power
Transformer
Power Switch
ANR
ANR
ANF
5/5MAIN 4/5MAIN 3/5MAIN 2/5MAIN 1/5MAIN
1/5MAIN
DM
DM
VR
VR
PN
PN
DG80-112
5
CIRCUIT BOARD LAYOUT

BLOCK DIAGRAM DISASSEMBLY PROCEDURE
DG80-112
6
INPUT LOW
JK501
INPUT HIGH
JK701
TRIM VR
IC501
RED
GREEN
INPUT LEVEL INDICATOR
IC701
ANF2
ANF
DM
IC104
IC105
IC118
IC119
IC3
IC8,11
IC2
IC123
IC125
I/V
IC122
IC124
IC403
IC34
IC13
IC21,27 IC36
I/V
D/A D/A
DRAM
F-ROM
IC12,14
75
1 2
75
5721
6157
57 31
16
5721
31
21
27
S-RAM
DSP
CPU
D•FF
D•FF
BUFF
A/D
DF
PN
VR
G
A
I
N
M
A S
T
H
•
M
I
D
L
•
M
I
D
B A S S
T
R
E
P
R
E
P
R
VMOTOR
DRIVE
PS PW
ANF
ANR
AC IN
POWER SW
TRANS
MUTING
POWER
SUPPLY
+HB +/-15V +/-5V
OUTPUT
VR
POWER AMP SP JACK
LOAD:
(EXT)
4~8
RETURN
SEND
JK403
IC402
IC401
JK402 JK401
EFECT
LEVEL
LINE OUT LEVEL
LINE OUT
KEC-54160 1
[60]: Hexagonal Nut 5.0 MFC2BL
(20040400) [30A]: Oval Head Screw 5.0X35 MFC2BL
(VP104600)
[70]: Oval Head Tapping Screw-1 4.0X30 MFC2BL
(EN240090)
(Fig. 1) (Fig. 2)
[70]
[60A]X4
Connector assembly (speaker)
Speaker
Back board(U)
Pre-main unit
Pre-main unit
[70]
[30A]
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 plug of the connector assembly
(speaker) located on the rear panel and the six
(6) screws marked [30A]. The pre-main unit
can then be removed by sliding it backward.
(Fig. 1, Fig. 2)
2. Speaker
2-1 Remove the pre-main unit. (See Procedure 1.)
2-2 Remove the four (4) hexagonal nuts with
flanges marked [60A]. The speaker can then be
removed. (Fig. 1)
3. Front Panel Assembly
3-1 Remove the pre-main unit. (See Procedure 1.)
3-2 Remove the five (5) screws marked [30B]. The
front panel assembly can then be removed.
(Fig. 3)

[30B]: Bind Head Screw A4.0X8 MFZN2BL (VP156800)
[30C]: Bind Head Screw A3.0X8 MFZN2BL (VP156700)
[40]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[40c]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)
[50]: Bind Head Screw A4.0X8 MFZN2BL (VP156800)
[80]: Bind Head Screw A4.0X8 MFZN2BL (VP156800)
[20d]: Pan Head Screw SP3.0X8 MFZN2Y (EK400500)
[60C]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)
[150A,B]:Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[150B-E]:Pan Head Screw SP3.0X12 MFZN2Y (EL200070)
(Fig. 3)
(Fig. 4)
Sub angle(R)
Sub angle(L)
Front panel assembly Front panel assemblyDM circuit board assembly
ANR circuit board assembly
ANR
DM
Power transformer
MAIN 5/5
[40]
[50][
150A]
[30C]
[A]
[60B]
[40C] X 6
[30B] X 5
[150E]
[60B]
[50]
[80]
[60C] X 6
[20d] X 2
MAIN 4/5
MAIN 1/5
MAIN 3/5 MAIN 2/5
[150B]
[150C][150D]
DG80-112
7
4. DM Circuit Board
4-1 Remove the pre-main unit. (See Procedure 1.)
4-2 Remove the two (2) screws marked [150A] and
the six (6) screws marked [40c]. The DM
circuit board can then be removed. (Fig. 3)
5. Power Transformer
5-1 Remove the pre-main unit. (See Procedure 1.)
5-2 Remove the four (4) screws marked [80]. The
Transformer can then be removed. (Fig. 3)
6. ANR Circuit Board
6-1 Remove the pre-main unit. (See Procedure 1.)
6-2 Remove the two (2) screws marked [150A] and
the seven (7) screws marked [50]. The DM circuit
board assembly can then be removed. (Fig. 3)
6-3 Remove the screw marked [30C], the two (2)
screws marked [40], the two (2) knobs marked
[60B] and the two (2) hexagonal nuts marked
[A]. The ANR circuit board assembly can then
be removed. (Fig. 3)
6-4 Remove the two (2) screws marked [20d]. The
ANR circuit board can then be removed from
the ANR circuit board assembly. (Fig. 3)
7. Main (1/5-2/5) Circuit Board
7-1 Remove the pre-main unit. (See Procedure 1.)
7-2 Remove the front panel assembly.
(See Procedure 3.)
7-3 Remove the DM circuit board assembly.
(See Procedure 6-2.)
7-4 Remove the ANR circuit board assembly.
(See Procedure 6-3.)
7-5 Each circuit board can then be removed in its
manner as below.
Main 1/5 Circuit Board
Remove the six (6) screws marked [60C]. The
main 1/5 circuit board can then be removed.
(Fig. 4)
Main 2/5 Circuit Board
Remove the screw marked [150B]. The main
2/5 circuit board can then be removed. (Fig. 4)
Main 3/5 Circuit Board
Remove the screw marked [150C]. The main
3/5 circuit board can then be removed. (Fig. 4)
Main 4/5 Circuit Board
Remove the screw marked [150D]. The main
4/5 circuit board can then be removed. (Fig. 4)
Main 5/5 Circuit Board
Remove the screw marked [150E]. The main
5/5 circuit board can then be removed. (Fig. 4)

8. PN Circuit Board
8-1 Remove the pre-main unit. (See Procedure 1.)
8-2 Remove the front panel assembly.
(See Procedure 3.)
8-3 Remove the six (6) screws marked [90]. The
PN circuit board assembly can then be removed.
(Fig. 5)
8-4 Remove the seven (7) top cap assemblies from
the PN circuit board assembly.
9. ANF Circuit Board
9-1 Remove the pre-main unit. (See Procedure 1.)
9-2 Remove the front panel assembly.
(See Procedure 3.)
9-3 Remove the two (2) knobs marked [110], the
two (2) hexagonal nuts marked [B] and the
hexagonal nut marked [120A]. The ANF circuit
board can then be removed. (Fig. 5)
10. ANF2 Circuit Board
10-1 Remove the pre-main unit. (See Procedure 1.)
10-2 Remove the hexagonal nut marked [120B]. The
ANF2 circuit board can then be removed. (Fig. 5)
11. VR Circuit Board
11-1 Remove the pre-main unit. (See Procedure 1.)
11-2 Remove the front panel assembly.
(See Procedure 3.)
11-3 Remove the eight (8) knobs marked [100] and
the four (4) screws marked [30D]. The VR circuit
board assembly can then be removed. (Fig. 5)
11-4 Remove the eight (8) hexagonal nuts marked
[C]. The VR circuit board can then be removed
from the VR circuit board assembly. (Fig. 6)
12. Replacement of The Lithium Battery
12-1 Remove the pre-main unit. (See Procedure 1.)
12-2 The lithium battery marked [D], on the DM
circuit board, can be replaced.
DG80-112
8
Battery [D]
Battery VS246400
VS246300(Battery holder for VS246400)
Notice for back-up battery removal
Push against the holder hook, then the
battery will pop up.
Druk tegen de houder, de batterij springt
dan naar voren. Battery holder
[30D]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)
[90]: Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)
[120A,B]:Hexagonal Nut 9.0X12X2 MFNI33 (LX200060)
(Fig. 5)
(Fig. 6)
[120B]
[120A]
[90]
[100]
Top cap assemblies
VR circuit board assembly
[110], [B]
ANF2
ANF
[C]
Angle,motor volume
[30D]
PN
VR
VR

DG80-112
9
LSI PIN DESCRIPTION
PIN
NO.
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
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
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
NAME
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)
FUNCTION PIN
NO.
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
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
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
NAME
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
FUNCTION
HD6413002FP16 (XQ375A00) CPU <H8/3002> DM : IC13

DG80-112
10
PIN
NO.
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
I/O
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
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
NAME
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
FUNCTION
YSS228E-F (XQ962D00) DSP3 (Digital Signal Processor) DM : IC2, 3
PIN
NO.
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
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
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
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
NAME
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
FUNCTION

DG80-112
11
OBIT 1
OBIT 2 H
22 bit
HL
20 bit
HH
18 bit
LL
no output
L
IBIT 1
IBIT 2
IBIT 3
H
22 bit
H
H
L
20 bit
H
H
H
18 bit
L
H
L
16 bit
L
H
H
AV DSP
H
L
H
MEL
H
L
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
I/O
I
I
I
I
O
I
I
I
I/O
I/O
AGND
APD
AINL+
AINL-
ACAL
LGND
VL+
NC
DACL
DPD
CMODE
SMODE
L//R
SCLK
NAME
Analog ground
Analog signal input (L channel -)
Analog signal input (L channel +)
Analog calibration
Analog logic ground
Analog logic power supply
Digital calibration
Digital power down
Master clock select
(L: CLK=256 fs, H:CLK=384 fs)
Interface clock select
(L: slave mode, H: master mode)
Input channel select
Serial data clock
FUNCTION PIN
NO.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
I/O
O
I/O
I
O
I
I
I
O
O
SDATA
FSYNC
VD+
DGND
CLK
OCLK
NC
ICLK
VA+
VA-
AINR-
AINR+
VREF-
VREF+
NAME
Serial data output
Frame synch. clock
Digital power supply (+)
Digital ground
Master clock
128 fs clock output
128 fs clock input
Analog power supply (+)
Analog power supply (-)
Analog signal input (R channel -)
Analog signal input (R channel +)
Reference voltage (-)
Reference voltage (+)
FUNCTION
AK5390-VP (XQ199A00) ADC (Analog.Digita Converter) DM : IC118
PIN
NO.
1
2
3
4
5
6
7
8
I/O
I
I
I
I
DATA
CLOCK
+Vdd
DGND
-Vdd
LE
NC
NC
NAME
Serial data input
Bit clock
Digital power supply (+5 V)
Digital ground
Digital power supply (-5 V)
Latch enable
Reserved
Reserved
FUNCTION PIN
NO.
9
10
11
12
13
14
15
16
I/O
I/O
O
I/O
I/O
+Vcc
BPO DC
I OUT
AGND
AGND
SERVO DC
REF DC
-Vcc
NAME
Analog power supply (+5 V)
BPO decouple
Current output
Analog ground
Analog ground
Servo decouple
Ref. decouple
Analog power supply (-5 V)
FUNCTION
PCM1702P (XN136A00) DAC (Digital to Analog Converter) DM : IC122, 123
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
I/O
O
I
I
I
I
I
I
I
-
I
XO
XI
VSS2
BCI
SDSY
IBIT1
IBIT2
IBIT3
MUTE
NC
SDI
VDD2
NAME
System clock
Ground
Bit clock
L/R select and input timing
Input bit selection
Mute
No connection
Input data
Power supply
FUNCTION PIN
NO.
13
14
15
16
17
18
19
20
21
22
23
24
I/O
I
I
-
I
O
O
O
O
-
O
OBIT1
OBIT2
NC
ASY
VSS1
BCO
WCO
SHL
DRO
NC
DLO
VDD1
NAME
Output bit selection
No connection
Synchronous/Asynchronous system clock
section
Ground
Bit clock of DLO, DRO
Word clock of DLO, DRO
Deglich signal of L/R channel
Output data of R channel
No connection
Output data of L channel
Power supply
FUNCTION
YSF210-M (XK280A00) Digital Filter DM : IC119

DG80-112
12
IC BLOCK DIAGRAM
Q
DCK
OE
Q
DCK
OE
Q
DCK
OE
Q
DCK
OE
OUTPUT
CONTROL
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
120
219
318
417
516
615
714
813
912
10 11
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(XN963A00)
Quad 2 Input OR
SN74HC244NSR(XD233A00)
Octal 3-State Bus Buffer
TC74HC157AF-TP1(XH603A00)
Quad 2 to 1 Multiplexer
TC74HC175AF -TP1(XD658A00)
Quad D-Type Flip-Flop
TC74HC4040F(XR684A00)
12-Stage Binary Ripple Counter
TC74HC164AF(XQ967A00)
8-Bit Shift Register
SN74HC374ANSR (XQ042A00)
Octal 3-State D-Type Flip-Flop
Vcc
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLOCK
Q
DCK
OE
Q
DCK
OE
CK
Q
DCK
OE
Q
DCK
OE
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
120
219
318
417
516
615
714
813
912
10 11
VDD (Vcc)
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1(GND) Vss
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
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 101 DM : IC 33 DM : IC 28, 29
DM : IC 35, 36
DM : IC 110DM : IC 18
DM : IC 21, 27
DN : IC 202 – 205
DM : IC 117
DM : IC 102

NE5532P(IG102500)
Dual Operational Amplifier
LB1641(XF494A00)
Motor Driver
MB3790PF(XR967A00)
ASSP
NJM072D(IG107000)
Dual Operational Amplifier
1
A
23456789
+V -IN -V
+INOUT
AAA
+V-IN
+IN OUT
BBB
-
+
B
-
+
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
+-
+-
GND
IN 1 IN 2
Vz
PRE DRIVER
56
4
3281097
Vcc2 OUT2 P2 Vcc1OUT1P1
1
INPUT LOGIC
N.C.
V BAT1
V OUT
V OUT
V BAT2
ALARM1
GND
CONTROL
N.C.
V IN
V IN
V SENSE
C T
RESET
RESET
ALARM1
1
2
3
4
5
6
7
8
10
9
13
12
11
16
15
14
2
3
4
5
6
7
8
9
10
11
12
16
14
13
C T
V BAT2 V BAT1
ALARM2
RESET
RESET
ALARM1
V OUT
V OUT
V IN
V IN
V SENSE
CONTROL
GND
-
+
-
+
-
+
590k
240k
1.24V
Reference
Voltage
Power Supply
Circuit
SQ
R
R CN 0.5
100
SBD
2.65V
2.37V
500
V IN
V IN
V OUT
V OUT
3µA
V th:3V
V th:1.5V
DM : IC 104, 105, 124, 125 ANF : IC 501 ANF2 : IC 701
ANR : IC 401 – 403
DM : IC 19
VR : IC 601 – 608
DG80-112
13

A. SET-UP
1. If no specific frequency is required, set the test
frequency at 1 kHz.
2. If no specific TRIM and OUTPUT settings are
required, set the volumes of TRIM and OUTPUT at
maximum.
3. Before turning the [POWER] switch on, set the
Idling Adjustment Volume (VR303, 470 ohms) at
minimum.
B. HOW TO ENTER THE TEST PROGRAM
While simultaneously pressing the [MODE], the
[REVERB] and the [DRIVE2] switches, turn the
[POWER] switch on. The DG80-112 will enter the
self test mode.
C. FACTORY PRESET OF RAM
While simultaneously pressing the [LEAD1] and the
[RECALL] switches, turn [POWER] switch on. The
RAM will be cleared, the factory setting data are
restored on the RAM, and the DG80-112 will enter
the normal mode.
D. PROCEEDING THROUGH THE TESTS
1. Switch Functions
Increment : test no. select upward
Decrement : test no. select downward
RECALL : start of the selected test
STORE : exit (in case of error)
LEAD1
– CLEAN2 : no effect
REVERB, MODE : no effect
2. LED Display Functions
When the DG80-112 is in the self test mode, the
LED display shows the number for the status as
below.
If the LED displays “E” and “(error no.)”, the
DG80-112 status can be changed to “test no.
selection” by pressing the [STORE] key. When the
status has been changed, the LED display shows a
next test no.
When the DG80-112 is in “test no. selection”, the
test no. can be changed by using the increment and
the decrement keys.
E. TEST PROGRAM
(Relay Check)
Check that the relay is switched ON within 2 – 3
minutes after the [POWER] switch is turned on.
(Menu of Test Program)
0. LED Check
1. Switch Check
2. Motor Drive Volume check
3. Volume Center Check
4. Battery Check
5. MIDI Check
6. SRAM Check
7. Flash Memory Erase/Write Check
8. Sound Check
9. TEST END
0. LED Check
(Test Contents)
When the DG80-112 enters the self test mode, the
LED Check is started and the LEDs light
automatically for the check in the sequence as
below.
• All the LEDs light simultaneously.
• All the LEDs go out simultaneously.
• The LEDs light one by one in the sequence as
below.
LEAD1 Program
LEAD2 Memory
DRIVE1 Channel
DRIVE2 Merge
CRUNCH1 All Data
CRUNCH2 User Mem.
CLEAN1 SP SIM
CLEAN2 VOL PEDAL
SPRING
HALL
PLATE
AMP
TAPE ECHO
UTIL.
LED display upper num. top
LED display upper num. right upper
LED display upper num. right lower
LED display upper num. bottom
LED display upper num. left lower
LED display upper num. left upper
LED display upper num. center
LED display upper num. dot
LED display lower num. top
LED display lower num. right upper
LED display lower num. right lower
LED display lower num. bottom
LED display lower num. left lower
LED display lower num. left upper
LED display lower num. center
LED display lower num. dot
DG80-112
18
TEST PROGRAM
• All the LEDs go out simultaneously
• All the LEDs light simultaneously
The LED Check is finished and the DG80-112
selects the next test no., so the LED shows a “1”.
(Error Number)
not appearing
1. Switch Check
Press the [RECALL] key when the LED display
shows “1”. The Switch Check is started and the
LED display shows the first check number “11”.
(Test Contents)
Press the keys according to the LED display guide
in the order as below.
(The Exit function of the [STORE] key is available
on the error status.)
11 LEAD1 Program Switch
12 LEAD2 Memory Switch
13 DRIVE1 Channel Switch
14 DRIVE2 Merge Switch
15 CRUNCH1 All Data Switch
16 CRUNCH2 User Mem. Switch
17 CLEAN1 SP SIM Switch
18 CLEAN2 VOL PEDAL Switch
19 REVERB Switch
1A MODE Switch
1B Increment Switch
1C Decrement Switch
1D STORE Switch
1E RECALL Switch
When all the LEDs display light simultaneously, the
Switch Check is finished. Then the DG80-112 selects
the next test no., so the LED display shows a “2”.
(Error Number)
E1 –EE
The switch corresponding to the error number has a
problem or the wrong switch was pressed.
2. Motor Drive Volume Check
Press the [RECALL] key when the LED display
shows “2”. The Motor Drive Volume Check is
started and the LED display shows the first check
number “21”.
(Test Contents)
Once the Motor Drive Check has been started, all
the volumes rotate automatically as below.
21 to the Minimum
22 to the Maximum
23 to the Center
When all the LEDs light simultaneously, the Volume
Check is finished. Then the DG80-112 selects the
next test no., so the LED display shows a “3”.
(Error Number)
E0 –E3
If a Motor Drive Volume Check operation has not
been finished in 20 seconds, the LED display shows
“E0 – “E3” by replacing “2” to “E”.
3. Volume Center Check
Press the [RECALL] key when the LED display
shows “3”, and the Volume Check is started and the
LED display shows one of the numbers from “31”
to“38”.
(Test Contents)
Select the knob that requires adjustment and turn it
until the LED display shows the next volume check
number.
33 TREBLE
34 HIGH MID
35 LOW MID
36 BASS
37 PRESENCE
The A/D converter value is shown with binary digits
by using the AMP SELECT LEDs. Set the knob to the
center and turn the trimmer potentiometer to adjust the
AMP SELECT LEDs as shown on the list below.
If the knob data is the same as the data of the list
above, the adjustment of that knob can be passed. The
trimmer potentiometer numbers are shown below.
TREBLE : VR603
HIGH MID : VR605
LOW MID : VR607
BASS : VR609
PRESENCE : VR611
Once the required Volume Center Check has been
finished, press the [RECALL] key and the DG80-
112 selects the next test no., so the LED display
shows “4”.
(Error Number)
not appearing
4. Battery Check
Press the [RECALL] key when the LED display
shows "5". The Battery Check is started.
(Test Contents)
The RAM Backup Battery check is executed
automatically.
Function
(status)
test no. selection
test execution
ok
error
upper num.
(test no.)
(test no.)
8.
E
lower num.
(blank)
(check no.)
8.
(error no.)
LED display
AMP
SELECT
LED
LEAD1
Program
On
LEAD2
Memory
Off
DRIVE1
Channel
Off
DRIVE2
Merge
Off
AMP
SELECT
LED
CRUNCH1
All Data
Off
CRUNCH2
User Mem.
Off
CLEAN1
Off
CLEAN2
Off

DG80-112
19
When all the LEDs light simultaneously, the Battery
Check is finished. Then the 80-112 selects the next
test no., so the LED display shows “5”.
(Error Number)
E0 : Battery Low (RAM DATA are kept.)
E1 : Unknown Error
E2 : Battery Low (RAM DATA are not kept.)
or Not Installed
5. MIDI Check
Connect the MIDI IN and the MIDI OUT terminals
with a MIDI cable. Press the [RECALL] key when the
LED display shows “5”. The MIDI Check is started.
(Test Contents)
The loop back MIDI check is executed automatically.
When the MIDI check is started, the LED display
shows “51” and then “52”. When all the LEDs light
simultaneously, the MIDI Check is finished. Then
the DG80-112 selects the next test no., so the LED
display shows “6”.
(Error Number)
E0 : MIDI Error
E1 : MIDI Error
6. SRAM Check
Press the [RECALL] key when the LED display
shows “6”. The SRAM Check is started.
(Test Contents)
The SRAM read/write check is executed
automatically.
When the SRAM Check is started, the LED display
shows “61” and then “62”. When all the LEDs light
simultaneously, the SRAM Check is finished. Then
the DG80-112 selects the next test no., so the LED
display shows “7”.
(Error Number)
E0 :RAM Address Error
E1 :RAM Read/Write Error
7. Flash Memory Erase/Write Check
Press the [RECALL] key when the LED display
shows “7”. The Flash Memory Erase/Write Check is
started.
(Attention)
When the result of the test number 6 has alredy been
“Error”, don't execute this test, or the DG80-112
won't set up at normal mode by the rewrited wrong
data in the Flash Memory.
Don't turn the [POWER] switch off while executing
this test, the DG80-112 won't set up at normal mode
by no data in the Flash Memory.
(Test Contents)
The Flash Memory Erase/Write check is executed
automatically.
When the check is started, the LED display shows
from “70” to “73” successively. When all the LEDs
light simultaneously, the Flash Memory Erase/Write
check is finished. Then the DG80-112 selects the
next test no., so the LED display shows “8”.
(Error Number)
E0, E1 : Flash Erase Error
E2, E3 : Flash Write Error
8. Sound Check
Before executing this sound check, the idling
adjustment, the output wave adjustment and center
voltage adjustment must be finished. the three
adjustments can be done while the LED display
shows “8”.
(Idling Adjustment)
1. Set the idling adjustment volume (VR303) at
minimum.
2. Connect the 4 ohm load to the speaker terminals.
3. Set the output volume at minimum.
4. Adjust the VR303 so that the DC voltage between
the terminals of the RA301 should be 5 +/-1 mV.
(Output Wave Adjustment)
1. After adjusting the idling adjustment, set the
OUTPUT VR at maximum.
2. When the signal of -2 dBm / 1 kHz is inputted from
the RETURN terminal, adjust the VR 301 (4.7 k
ohms) so that the wave shape should be a sine wave
symmetrical for upper and lower as below.
(Center Voltage Adjustment)
1. Adjust the VR302 so that the voltage of the output
circuit (RA301) should be 38 +/- 2 V.
* By adjusting the output adjustment and the center
voltage adjustment alternatively, search the best point.
After finishing the adjustments above, press the
[RECALL] key when the LED display shows “8”.
The Sound Check is started.
T•P
0.22X2 RA301
T•P
Adjust the VR301
to be a sine wave.

DG80-112
20
(Test Contents)
The DG80-112 sets the conditions for the signal
Sound Check through the analogue circuit, the A/D
converter, the DSP-3 and the D/A Converter.
When the Sound Check is started, the LED display
shows “81”. The Sound Check has two conditions.
If the [RECALL] key is pressed when the LED
display shows “81”, the LED display changes to
“82” and the condition changes to the next as below.
81 : DSP3-1
82 : DSP3-2
Check the following items in each condition of “81”
and “82”.
* 0 dBm = 0.775 V Load = 4 ohms
If the Sound Check has been finished, press the
[RECALL] key when the LED display shows “82”.
The LED display shows “9”.
(Error Number)
not appearing
9. TEST END
A “9” on the LED display signals the end of the
TEST and the exit of the Test Program. Press the
[RECALL] key when the LED display shows “9”.
The mode of the DG80-112 changes to the normal
mode and all of the function data are set to the
condition of the latest program number in normal
mode. The Motor Drive Volumes rotate
automatically to the settings of that data.
Items
1. Input Sensitivity
(High)
2. Input Sensitivity
(Low)
3. RETURN Level
4. SEND Level
5. LINE OUT
Level
6. Frequency
Response
(HIGH IN)
7. Remain Noise
8. Sensitivity of
LED for Input
Level
9. Output
Conditions
1 kHz, -30 dBm
1 kHz, -20 dBm
1 kHz, 0 dBm
Condition of 1. and
100 k ohms SEND
load
Condition of 1. and
100 k ohms LINE
OUT load
-40 dBm Input
1 kHz standard
SP Output Terminal
TRIM, OUTPUT
VR MIN IHF A net
Lo Input
TRIM Vol:
maximum
OUTPUT Vol:
maximum
RETURN,10 %THD
Responses
(standards)
+28 dBm +/-2 dB
+28 dBm +/-2 dB
+28 dBm +/-2 dB
-1 dBm +/-2 dB
+3 dBm +/-2 dB
100 Hz: 0.5 +/-1 dB
10 kHz: 0.5 +/-1 dB
less than -60 dBm
Input LED
-30 dBm: no light
-20 dBm: GR only
+4 dBm: both lit
more than +28 dBm
(95 W)

ERROR MESSAGES
DG80-112
21
If an error occurs during operation, one of the following error message numbers will appear on the display.
: Motor Drive Error
CAUSE: The volume knob has not returned to its assigned position after 20 seconds has elapsed from the start of the recall
operation or, the device does not recognize the recall command.
SOLUTION: Turn off the power and check the circuit for Motor Drive.
: MIDI Receive Buffer Full
CAUSE: Too much MIDI data is being received by the DG80-112 at one time.
SOLUTION: Try reducing the amount of data being sent or, break the data into smaller blocks.
: Communication Error
CAUSE: An abnormality is detected during MIDI communications.
SOLUTION: Check all connections, etc. and try again.
: 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.
: Bulk Receive Data Abnormality
CAUSE: An abnormality is detected in the received MIDI bulk data.
SOLUTION: Check all connections and data, and try again.
: Backup Battery Error
CAUSE: Backup battery power is depleted.
SOLUTION: Continued use of the device will result in the loss of data. Replace the battery with a new one.

YAMAHA [ Digital Guitar Amplifier ] Date:1-Dec-1998
Model DG80-112 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 : :
:-------------------+----------------+----------------+----------------:
: 0 - 6 : x : x : :
: 7 : x : o : Main Volume :
: 8 - 90 : x : x : :
: 91 : x : o : Reverb SW. :
: Control 92,93 : x : x : :
: 94 : x : o : Tape Echo SW. :
: Change 95 - 127 : x : x : :
: : : : :
: : : : :
: : : : :
: : : : :
: : : : :
: : : : :
:-------------------+----------------+----------------+----------------:
: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 :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
DG80-112
22

CIRCUIT BOARDS
DG80-112
14
MIDI
IN OUT
to DM-CN9
Component side
ENA-VZ77180-1/10 3
DM Circuit Board
Note : See parts list for details of circuit board
component parts.

DG80-112
15
to DM-CN9
Pattern side
ENA-VZ77180-2/10 1
DM Circuit Board
Note : See parts list for details of circuit board
component parts.