Yamaha DG80-112 Schematic

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

2

1

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

BAS

S

T

R

E

PRE

PRV

MOTOR

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 T ransformer

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

H

L

20 bit

H

H

18 bit

L

L

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+

AINL­ACAL

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-

AINR­AINR+
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

1 20

2 19

3 18

4 17

5 16

6 15

7 14

8 13

9 12

10 11

TCHCU04AF-TP1(XD660A00)
Hex Inverter

SN74HC08NSR(XD831A00)
Quad 2 Input AND

1

2

31A1Y

42A

52B

62Y

7VSS

1B

14

13

12

VDD

4A

11 4Y

10 3B

93A

83Y

4B

1

2

3AQA 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

31A1Y

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

1 20

2 19

3 18

4 17

5 16

6 15

7 14

8 13

9 12

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

QD

CK

QCL

QD

CK

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

9

CK

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

9

3Y

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

9

Q1Q1

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

1A2 3 4 5 6 7 8 9

+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

5

6

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

BAT2V 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

S

Q

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 DG80­112 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