Yamaha Portable Grand DGX-220 User manual

SERVICE MANUAL
HAMAMATSU, JAPAN
Copyright (c) Yamaha Corporation. All rights reserved. PDF ’06.04
PK 001761
CONTENTS
SPECIFICATIONS .................................................................... 3
PANEL LAYOUT........................................................................ 4
CIRCUIT BOARD LAYOUT & WIRING ..................................... 6
BLOCK DIAGRAM .................................................................... 8
DISASSEMBLY PROCEDURE ................................................. 9
LSI PIN DESCRIPTION .......................................................... 15
IC BLOCK DIAGRAM.............................................................. 18
CIRCUIT BOARDS ................................................................. 19
TEST PROGRAM ................................................................... 29
INITIALIZATION ...................................................................... 33
USER DATA BACKUP............................................................. 34
MIDI IMPLEMENTATION CHART ........................................... 35
MIDI DATA FORMAT ............................................................... 36
PARTS LIST
OVERALL CIRCUIT DIAGRAM
DGX-220
YPG-225

2
DGX-220/YPG-225
SAVING DATA
Saving and backing up your data
The panel settings and some other types of data are not retained in memory when you turn off the power to the
instrument. Save data you want to keep to the Registration Memory.
Saved data may be lost due to malfunction or incorrect operation.
Save important data to a USB storage device/or other external device such as a computer.
Be sure to
p
erform it
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 per-
sonal injury, destruction of expensive components and failure of the product to perform as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.
IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.
The data provided is believed 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.
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
WARNING
Backing up the USB storage device/external media
To protect against data loss through media damage, we recommend that you save your important data onto two
USB storage devices/external media.
Be sure to
p
erform it

3
DGX-220/YPG-225
■ SPECIFICATIONS
Keyboards
• 76 box type keys (E0–G6), with Touch Response.
Display
• LCD display (backlit)
Setup
• STANDBY/ON
• MASTER VOLUME:MIN–MAX
Panel Controls
• SONG, VOICE, STYLE, EASY SONG ARRANGER,
P.A.T. ON/OFF, LESSON L, LESSON R, LESSON
START, METRONOME ON/OFF, PORTABLE GRAND,
DEMO, FUNCTION, MUSIC DATABASE, HARMONY ON/
OFF, DUAL ON/OFF, SPLIT ON/OFF, TEMPO/TAP, [0]–
[9], [+], [-], CATEGORY, Dial, REPEAT & LEARN (ACMP
ON/OFF), A-B REPEAT (INTRO/ENDING/rit.), PAUSE
(SYNC START), START/STOP, REW (MAIN/AUTO FILL),
FF (SYNC STOP), REGIST MEMORY ([MEMORY/BANK],
[1], [2]), SONG MEMORY (REC, [1]–[5], [A])
Realtime Control
• Pitch Bend Wheel
Voice
• 116 panel voices + 12 drum/SFX kits + 361 XGlite voices
• Polyphony: 32
• DUAL
• SPLIT
Style
• 150 Preset Styles + 1 User Style File
• Style Control:ACMP ON/OFF, SYNC STOP,
SYNC START, START/STOP,
INTRO/ENDING/rit., MAIN/AUTO FILL
• Fingering: Multi Finger, Full Keyboard
• Style Volume
Music Database
• 267
Education Feature
• Dictionary
• Lesson 1–3, Repeat & Learn
Registration Memory
•8banks x 2 types
Function
• VOLUME: Style Volume, Song Volume
• OVERALL: Tuning, Transpose, Split Point, Touch Sensi-
tivity, Pitch Bend Range, Chord Fingering
• MAIN VOICE: Volume, Octave, Pan, Reverb Level,
Chorus Level
• DUAL VOICE: Voice, Volume, Octave, Pan, Reverb Level,
Chorus Level
• SPLIT VOICE: Voice, Volume, Octave, Pan, Reverb Level,
Chorus Level
• EFFECT: Reverb Type, Chorus Type, Master EQ Type,
Sustain
• HARMONY: Harmony Type, Harmony Volume
• Performance assistant technology:
Performance assistant technology Type
• SFF Load: Style File Load
•
PC: PC Mode
•
MIDI : Local On/Off, External Clock, Initial Send,
Keyboard Out, Style Out, Song Out
• METRONOME : Time Signature Numerator, Time Signature
Denominator, Metronome Volume
• LESSON: Lesson Track (R), Lesson Track (L), Grade
• UTILITY : Demo Cancel
Effects
• Reverb: 9 types
• Chorus: 4 types
• Harmony: 26 types
Song
• 30 Preset Songs + 5 User Songs + Accessory CD-ROM
Songs (70)
• Song Clear, Track Clear
• Song Volume
•Song Control: REPEAT & LEARN, A-B REPEAT, PAUSE,
REW, FF, START/STOP
Performance assistant technology
• Chord, Chord/Free
Recording
• Song
User Song: 5 Songs
Recording Tracks: 1, 2, 3, 4, 5, STYLE
MIDI
• Local On/Off • Initial Send • External Clock
• Keyboard Out • Style Out • Song Out
Auxiliary jacks
• PHONES/OUTPUT, DC IN 12V, USB, SUSTAIN
Ampli er
• 6W + 6W
Speakers
• 12cm x 2 + 3cm x 2
Power Consumption
• 20W
Power Supply
• Adaptor: Yamaha PA-5D AC power adaptor
• Batteries:
Six “D” size, R20P (LR20) or equivalent batteries
Dimensions (W x D x H)
• 1,178 x 412 x 137 mm (46-3/8" x 16-1/4" x 5-3/8")
Weight
• 8.3kg (18 lbs. 5 oz.) (not including batteries)
Supplied Accessories
• Music Rest
• Accessory CD-ROM
• Owner’s Manual
Optional Accessories
• AC Power Adaptor: PA-5D
• Footswitch: FC4/FC5
• Keyboard Stand: LW-16
• Headphones: HPE-150

4
DGX-220/YPG-225
q[STANDBY/ON] switch
w[MASTER VOLUME] control
e[P.A.T. ON/OFF] button
r[MUSIC DATABASE] button
t[FUNCTION] button
yLESSON [L], [R], [START] buttons
u[METRONOME ON/OFF] button
i[TEMPO/TAP] button
oSONG MEMORY
[REC], [1]–[5], [A] buttons
!0 [REPEAT & LEARN]/
[ACMP ON/OFF] button
!1 [A-B REPEAT]/
[INTRO/ENDING/rit.] button
!2 [REW]/[MAIN/AUTO FILL] button
!3 [FF]/[SYNC STOP] button
!4 [PAUSE]/[SYNC START] button
!5 [START/STOP] button
!6 [SONG] button
!7 [EASY SONG ARRANGER] button
!8 [STYLE] button
!9 [VOICE] button
@0 Dial
@1 CATEGORY [ ] and [ ] buttons
!0 !1 !2 !3 !4 !5
q
w
uiy
@9
o
e r t
• Front Panel
• Front Panel
■ PANEL LAYOUT

5
DGX-220/YPG-225
#0 USB terminal
#1 SUSTAIN jack
#2 PHONES/OUTPUT jack
#3 DC IN 12V jack
#0 #1 #2 #3
!6
!7
!8
!9
@4
@2
@3
@5
@0
@1
@6 @7 @8
• Rear Panel
@2 Number buttons [0]–[9],[+] and [-] buttons
@3 [DEMO] button
@4 REGIST MEMORY [MEMORY/BANK], [1], [2] buttons
@5 [PORTABLE GRAND] button
@6 [SPLIT ON/OFF] button
@7 [DUAL ON/OFF] button
@8 [HARMONY ON/OFF] button
@9 PITCH BEND wheel
• Rear Panel

6
DGX-220/YPG-225
■CIRCUIT BOARDS LAYOUT & WIRING
• Upper case
• Lower case
16 1 2 3 1615
Black
Red
Black
Red
MK-76L MK-76H
RIGHT SIDE
RED BLACKBLACKBROWN
LEFT SIDE
1615
2
3161654
1481012139 11
7
DMLCD
PB
(AMJK 6/6)
TWL
(PN 4/6)
TWR
(PN 5/6)
AMJK 4/6
AM
(AMJK 1/6)
PNL
(PN 3/5)
PNR
(PN 1/5)
(Rotary Encoder)(Master Volume)
(STANDBY/ON)
PN 2/5
USB
(AMJK 3/6)
AMJK 5/6

7
DGX-220/YPG-225
30 WC601000 MK1
MK4
MK5
VR3
STB2
AMDM2
MK-76L-CN4 *1 *5 DMLCD-CN401 *1 *5 12P
40 WC601400
WC601500
WG332600
WG332700
WG342900
MK-76L-CN5 *1 *5 DMLCD-CN404 *1 *5 6P
50 MK-76H-CN1 *1 *5 DMLCD-CN405 *1 *5 8P
WH551 AM-CN551 *2 *5 AM-CN552 *2 *5 5P
WH153 AM-CN153 *2 *5 AM-CN154 *2 *5 4P
WH155 AM-CN155 *2 *5 DMLCD-CN101 *1 *5 13P
WH854 WG332500 USB-CN854 *2 *5 DMLCD-CN802 *1 *5 9P
WH782 WG331300 PNR-CN782 *2 *5 PNR-CN783 *2 *5 3P
WH855 WG331500 PB-CN855 *2 *5 PML-CN785 *1 *5 3P
WH781 WG331900 PN3 PNR-CN781 *2 *5 DMLCD-CN701 *1 *5 16P
WH784 WG332000 PN4
JK2
PNL-CN784 *2 *5 DMLCD-CN703 *1 *5 16P
-- WC602600 BL +/- *3 *6 AM-CN152 1*5 2P
WH553 WB342800 TW4
PB2
AM-CN553 *2 *5 TWL +/- *3 *6 2P
WH558 WG342600 TW2 USB-CN558 *2 *5 TWR +/- *3 *6 2P
220 WG324100 SPL
ENC
+/- *3 *10 AM-CN554
USB-CN557
*1 *10 2P
Caution: Be sure to attach the removed filament tape just as it was before removal.
Location Part No. Connector Assembly Destination Remarks
q
w
e
r
t
y
u
i
o
!0
!1
!2
!3
!4
!6
130 V8735600 BAT -- *3 *10 AM-CN151 *1 *10 3P
!5
No.
* The parts with "--" in "Part No." are not available as spare parts.
* 1 : Installation
* 2 : Dip soldering
* 3 : Manual soldering
* 4 : The conductor of a cable and the point of contact of a connector are untited.
* 5 : Edge mark is adjusted to Pin 1 (왕) side.
* 6 : Edge mark is connected to + side.
* 7 : Edge mark is connected to + terminal.
* 8 : White wire is adjusted to Pin 1 (왕) side.
* 9 : White wire is connected to + terminal.
* 10 : Red wire is connected to + terminal.
* 11 : Connected

8
DGX-220/YPG-225
■BLOCK DIAGRAM
+V
+3.3D
37
+3.3D
37
+3.3D
N11-N16,
N21-N26
B1-B14
SD0
SYSCK
BCLK
WCLK
MA01-22
MD00-15
MD01-22
MD00-15
MD01-18
MD00-15
MD01-09
MD00-15
IC501(16P)
IC203(48P)
IC401
(16P)
IC402
(16P) IC206(48P) IC204(44P)
IC502(8P)
Rch
Lch
IC102
IC103
IC101
PE3-6 +2.5D +3.3D
+5D
+V
fc=27KHz
+3.3D
+5D
+2.5D
+V
MASTER
VOLUME
A5K
+3.3V
+2.5V
REGULATOR
REGULATOR
+5V
REGULATOR
SW151
STAND
BY/ON
R
L
WOOFER R
12cm
4
WOOFER L
12cm
4
SPEAKERS
+
-
+
+
-
-
TWEETER R
3cm
TWEETER L
3cm
PHONES
/OUTPUT
BATTERIES
(1.5V x 6)
USB
JK854
JK855
SUSTAIN
LD601
IC802
(64P)
IC301
(128P)
16.9344MHz
IC302(5P)
X301
X801
Rotary Encoder
EC781
VR751
PITCH BEND
BACK LIGHT
PB0-PB7
PB0-PB7
J851 FG
PA0-PA3
PF0
PA0-PA7,
PA0-PA7
PA4-PA7
PB0-PB7 PB0-PB7
PA0-PA7,
RS,ENB
AN2
SP_R
SP_R
VR551
SDI
IC801
(10P)
41
9
2
6325,26
64
16
117
12,13
12,13
8
1
+5D
33
+3.3D
+3.3D
5
+3.3D
TR701-704
IC601(80P)
BATT CHECK
38K0 AN1
6MHz
RESET
DATA ENTRY
RXD0
TXD0
IRQ0
RXD1(EN/A), SCLK1(EN/B)
PF0
VBUS
D+
D-
AN7
AN0
USB
+
-
JK551
PA-5D
JK151 DC IN 12V
-
+
IC151(4P)
+6V
REGULATOR
AMJK
5/6
+
+
-
8
72
6
1
14
+3.3D
16
4,15,46,
89,119
24,66,
90,120
8
7
-
(AMJK 3/6)
TWR
(PN 4/5,5/5)
TWL
(PN 4/5,5/5)
AMJK
4/6
PB
(AMJK 6/6)
AM
(AMJK 1/6)
(PN 3/5)
(PN 1/5)
DMLCD
SW
MATRIX
SW
MATRIX
LED
LCD
DISPLAY
LED
DRIVER
LED
DRIVER
USB
CPU
LCD
DRIVER
CPU+XG
24bit
DAC
ADC
4M
DRAM
4M
FLASH
ROM
64M
ROM
PROG/
WAVE
DECODER
Keyboard
76KEY(16N)
BUFFER
/LPF
RESET
+3.6V
50mS
PN
2/5
PNL
PNR
MK-76L
MK-76H
CN802(9P) CN803(9P) CN782(3P)
CN785(3P)
CN703(16P)
CN784(16P)
CN781(16P)
CN3(12P)
CN2(12P)
(C#3~G6)
(E0~C3)
CN152(2P)
CN701(16P)
CN101(13P)
CN155(13P)
CN405(8P)
CN783(3P)
CN855(3P)
CN404(6P)
CN4(12P) CN5(6P) CN1(8P)
CN401(12P)
CN153(4P)
CN154(4P)
CN854(9P)
CN558(2P)
CN557(2P)
CN554(2P)
CN553(2P)
CN151(2P)
28CA1-2001002837
CN551(5P)
CN552(5P)
POWER AMP
6W x 2
BTL
LA4625
IC551(14P)
13
11
9
1
L CH
+V
R CH 6
8
14
1,6,22

9
DGX-220/YPG-225
■DISASSEMBLY PROCEDURE
(Fig.1)
<Bottom View>
[180] [180]
[180] [180] [180]
[180][180]
[390] [470] [390] [470]
Battery cover assembly
Lower case assembly
[180]: Bind Head Tapping Screw-B 3.0X8 MFZN2W3 (WE774300)
[390]: Bind Head Tapping Screw-B 3.0X30 MFZN2W3 (WF491000)
[470]: Spacer (WG387800)
1. Lower Case Assembly(Time required: About 3 minutes)
1-1 Remove the battery cover assembly. (Fig.1)
1-2 Remove the sixteen (16) screws marked [180], the five (5) screws marked [390] and the ten (10) spacers marked [470].
The lower case assembly can then be removed. (Fig.1)

10
DGX-220/YPG-225
Lower case assembly
Spring terminal (+) Spring terminals Spring terminal (-)
(Fig.2)
Spring Terminal(+)
Hook Hook
Hook
Spring Terminal(-)
Spring Terminal
Hook
(Fig.3) (Fig.4)
2. Spring Terminal
A. Spring Terminal (+) and (-)
2-1 Remove the Lower case assembly. (See procedure 1.)
2-2 Remove the battery harness soldered to the spring terminal (+) or (-). (Fig.2)
2-3 Remove the hooks (two at each place) and pull out the spring terminal (+) or (-). (Fig.3, Fig.4)
B. Spring Terminal
2-1 Remove the Lower case assembly. (See procedure 1.)
2-2 Remove spring terminal hooks (two at each place) and pull out the spring terminal. (Fig.4).

11
DGX-220/YPG-225
3. TWL and TWR(PN 4/5, 5/5) Circuit
Boards, Speaker (Tweeter)
(Time required: About 4 minutes for
each)
3-1 Remove the lower case assembly. (See procedure
1.)
3-2 Remove two (2) screws marked [180A]. The
TWL(PN 4/5, 5/5) circuit board can then be
removed. (Fig.6)
3-3 Remove the speaker (tweeter). (Fig.5)
*The TWR circuit board can be removed in the
same manner. (Fig.5)
[180]: Bind Head Tapping Screw-B 3.0X8 MFZN2W3 (WE774300)
[380]: Bind Head Tapping Screw-B 3.0X12 MFZN2W3 (WE987400)
(Fig.7)
Sponge
Speaker (Tweeter)
TWR TWL
or ( )
(Fig.6)
1 7 8 2
3 4 5 6
DMLCD
[380] x 8
4. PB(AMJK 6/6) Circuit Board
(Time required: About 4 minutes)
4-1 Remove the lower case assembly. (See procedure 1.)
4-2 Remove two (2) screws marked [180B]. The PB (AMJK 6/6) circuit
board and the wheel assembly can then be removed. (Fig.6)
*The wheel assembly is inserted and mounted on the volume shaft of the
PB (AMJK 6/6) circuit board.
5. DMLCD Circuit Board, LCD Unit
(Time required: About 5 minutes)
5-1 Remove the lower case assembly. (See procedure 1.)
5-2 Remove two (2) screws marked [180C] and eight (8) screws marked
[380]. The DMLCD circuit board and LCD unit can then be removed.
(Fig.6)
*When installing the DMLCD circuit board, tighten the screws from
No.1 through No.8 in order as shown in Fig.7.
[380]: Bind Head Tapping Screw-B 3.0X12 MFZN2W3 (WE987400)
[180A]
Speaker
(Tweeter(R))
Speaker
(Tweeter(R)) [180A]
[180B]
Wheel assembly
PB
Upper Case
(AMJK 6/6)
[380][180I] [180F]
TWR
(PN 4/5,5/5)
TWL
(PN 4/5,5/5)
[180E]
AMJK 5/6
[180D]
PNR
(PN 1/5)
DMLCD
LCD unit
AMJK 4/6
(AMJK 1/6)
AM
[180C][180H]
PN 2/5

12
DGX-220/YPG-225
6. AM (AMJK 1/6), AMJK 4/6 and AMJK 5/6 Circuit
Boards
(Time required: About 6 minutes)
*The AMJK 4/6 and AMJK 5/6 circuit boards are connected to the
AM (AMJK 1/6) circuit board via wirings.
6-1 Remove the lower case assembly. (See procedure 1.)
6-2 Remove the master volume knob from the control panel. (Fig.8)
6-3 Remove three (3) screws marked [180D]. The AMJK 4/6 circuit
board can then be removed from the upper case. (Fig.6)
6-4 Remove two (2) screws marked [180E]. The AMJK 5/6 circuit board
can then be removed from the upper case. (Fig.6)
6-5 Remove seven (7) screws marked [180F]. The AM(AMJK 1/6),
AMJK 4/6 and AMJK 5/6 circuit boards can then be removed. (Fig.6)
8. PNL(PN 3/5) Circuit Board
(Time required: About 8 minutes)
8-1 Remove the lower case assembly. (See procedure 1.)
8-2 Remove the AM(AMJK 1/6), AMJK 4/6 and AMJK 5/6 circuit boards. (See procedure 6.)
8-3 Remove ten (10) screws marked [180G]. The PNL (PN 3/5) circuit board can then be removed. (Fig.10)
(Fig.10)
[180]: Bind Head Tapping Screw-B 3.0X8 MFZN2W3 (WE774300)
MASTER VOLUME
Cloth
Encoder knob
Cloth
(Fig.8)
(Fig.9)
[180G] PNL
Upper case
(PN 3/5)
7. PNR (PN 1/5) and PN 2/5 Circuit Boards
(Time required: About 6 minutes)
*The PN 2/5 circuit board is connected to the PNR (PN 1/5) circuit
board via a wiring.
7-1 Remove the lower case assembly. (See procedure 1.)
7-2 Remove the encoder knob from the control panel. (Fig.9)
7-3 Remove four (4) screws marked [180H]. The PN 2/5 circuit board
can then be removed from the upper case. (Fig.6)
7-4 Remove twelve (12) screws marked [180I]. The PNR (PN 1/5) and
PN 2/5 circuit boards can then be removed. (Fig.6)

13
DGX-220/YPG-225
9. Speaker (Woofer)
(Time required: About 4 minutes)
9-1 Remove the lower case assembly. (See procedure 1.)
9-2 Remove four (4) screws marked [200A], then remove the speaker (woofer). (Fig.11)
*Left and right speakers (woofers) can be removed in the same manner.
(Fig.12)
(Fig.11)
[200]: Bind Head Tapping Screw-B 4.0X10 MFZN2W3 (WE974500)
[240]: Bind Head Tapping Screw-P 3.0X20 MFZN2W3 (WF492000)
10. White and Black Keys
10-1 Remove the lower case assembly. (See procedure 1.)
10-2 Remove four (4) screws marked [240A] fixing the white/black
keys for each octave (C through B), then remove the white/
black keys for one (1) octave. (Fig.11)
At that time, push hooks on the black keys to lift the rear part,
then pull and slide the keys toward you to remove it. (Fig.12)
10-3 For the E0-B0 keys and C6-G6 keys, remove three (3) screws
[240B], push hooks on the black keys to lift the rear part, and
then pull and slide the keys toward you to remove it. (Fig.11)
Hook
[200A]
Speaker
(Woofer(L)) [200A]
Speaker
(Woofer(R))
[240B] x 3[240A] x 4[240A] x 4[240A] x 4[240A] x 4[240A] x 4[240B] x 3
E0 B0 C6 G6
Lower Case

14
DGX-220/YPG-225
(Fig.13)
[220]: Bind Head Tapping Screw-B 3.0X10 MFZN2W3 (WE774200)
(Fig.14)
(Fig.15)
Lower Case
[220B] [220D]
[220C][220A]
MK-76L MK-76H
29 678
13
54
12
13
11 10
13 654
13
78
14
21211109
15 1716
MK-76L MK-76H
11. MK-76L and MK-76H Circuit Boards
(Time required: About 7 minutes for each)
11-1 Remove the lower case assembly. (See procedure 1.)
11-2 Remove the E0-B3 white/black keys. (See procedure 10.)
Remove four (4) screws [220A] and nine (9) screws [220B]. The MK-76L circuit board and the key guide can then be
removed. (Fig.13)
11-3 Remove the C3-G6 white/black keys. (See procedure 10.)
Remove five (5) screws [220C] and twelve (12) screws [220D]. The MK-76H circuit board and the key guide can then be
removed. (Fig.13)
*When installing the MK-76L circuit board, tighten the screws from No. 1 through No. 13 in order as shown in Fig.14.
*When installing the MK-76H circuit board, tighten the screws from No. 1 through No. 17 in order as shown in Fig.14.
Rubber Contact
12. Rubber Contact
12-1 Remove the lower case assembly. (See
procedure 1.)
12-2 Remove the keyboard assembly correspond-
ing to the rubber contact. (See procedure 10.)
12-3 Remove the rubber contact. (Fig.15)

15
DGX-220/YPG-225
■ LSI PIN DESCRIPTION
M38K07M4L-307HP (X5186100) CPU(USB) ......................... 15
YMW767-VTZ (X6055A00) CPU............................................. 16
NT3881DFG-01 (X3148A00) LCD DRIVER............................ 17
AK4385ET (X6040A00) DAC .................................................. 17
• M38K07M4L-307HP (X5186100) CPU (USB)
DMLCD:IC802
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1
P1 2 /DQ 2 /AN 2 I/O
Port P1 (In/output)
33
P2 6 I/O
Port P2 (In/output)
2
P1 3 /DQ 3 /AN 3 I/O
34
P2 7 I/O
3
P1 4 /DQ 4 /AN 4 I/O
35
P5 0 /INT 0 I/O Port P5 (In/output)/Interruption input
4
P1 5 /DQ 5 /AN 5 I/O
36
P5 1 /CNTR 0 I/O Port P5 (In/output)/Timer X function
5
P1 6 /DQ 6 /AN 6 I/O
37
P5 2 /INT 1 I/O Port P5 (In/output)/Interruption input
6
P1 7 /DQ 7 /AN 7 I/O
38
P5 3 I/O
Port P5 (In/output)
7
CNV SS - Ground
39
P5 4 I/O
8
RESET
____________
ISystem reset input
40
P5 5 I/O
9
EccE - Analog power supply +3.3V
41
P5 6 I/O
10
V REF IReference voltage input
42
P5 7 I/O
11
Vss - Ground
43
P0 0 I/O
Port P0 (In/output)
12
X IN IClock input
44
P0 1 I/O
13
X OUT OClock output
45
P0 2 I/O
14
Vcc - Power supply +3.3V
46
P0 3 I/O
15
CNV SS 2- Ground
47
P0 4 I/O
16
P60(LED0) I/O
Port P6 (In/output)
48
P0 5 I/O
17
P61(LED1) I/O
49
P0 6 I/O
18
P62(LED2) I/O
50
P0 7 I/O
19
P63(LED3) I/O
51
P4 0 /E X DREQ/R X D I/O
Port P4 (In/output)/External bus interface/Serial I/O
20
PVss -
Analog power supply +3.3V
52
P4 1 /E X DACK/T X D I/O
21
PVcc -
53
P4 2 /E X TC/S CLK
_______
I/O
22
DVcc -
54
P4 3 /E X A1/S RDY I/O
23
USBV REF -USB reference power supply
55
P3 0 I/O
Port P3 (In/output)
24
TrON O USB reference voltage output
56
P3 1 I/O
25
D0+ I/O
USB upstream in/output
57
P3 2 I/O
26
D0- I/O
58
P33/EXINT I/O
Port P3 (In/output)/External bus interface
27
P2 0 I/O
Port P2 (In/output)
59
P34/EXCS I/O
28
P2 1 I/O
60
P35/EXWR I/O
29
P2 2 I/O
61
P36/EXRD I/O
30
P2 3 I/O
62
P3 7 /E X A 0 I/O
31
P2 4 I/O
63
P10/DQ0/AN0 I/O
Port P1 (In/output)
32
P2 5 I/O
64
P1 1 /DQ 1 /AN 1 I/O

16
DGX-220/YPG-225
Pin Pin
No.
NAME I/O FUNCTION
No.
NAME I/O FUNCTION
1 VSS - VSS 65 VSS - VSS
2TESTN I Input for TEST 66 IOVDD - IOVDD +3.3V
3 PLLBPN I PLL bypass select 67 LBN/LWRN/PF6 O External memory lower-byte enable
4PLLVDD - PLLVDD +2.5V 68 UBN/UWRN/PF7 O External memory upper-byte enable
5 CIN - Capacitor terminal for PLL 69 RDN/PF4 O External memory read enable
6 PLLVSS - PLLVSS 70 MD00 I/O
7 TRSTN I 71 MD08 I/O
8 TMS I 72 MD01 I/O
9 TCK I JTAG input 73 MD09 I/O External memory data bus
10 TDI I 74 MD02 I/O
11 TD0 O JTAG output 75 MD10 I/O
12 XI I Crystal oscillator 76 MD03 I/O
13 XO O Crystal oscillator 77 VSS - VSS
14 VSS - VSS 78 MD11 I/O
15 VDD - VDD +2.5V 79 MD04 I/O
16 ICN I Hardware reset 80 MD12 I/O
17 ECSN I CPU I/F chip select 81 MD05 I/O
18 EWRN/PD5 I CPU I/F write enable 82 MD13 I/O External memory data bus
19 ERDN/PD4 I CPU I/F read enable 83 MD06 I/O
20 EA3/PD3 I
CPU I/F address bus
84 MD14 I/O
21 EA2/PD2 I 85 MD07 I/O
22 EA1/PD1 I 86 MD15 I/O
23 EA0/PD0 I 87 WRN/PF5 O External memory write enable
24 IOVDD - IOVDD +3.3V 88 VSS - VSS
25 ED0/PC0 I/O
CPU I/F data bus
89 VDD - VDD +2.5V
26 ED1/PC1 I/O 90 IOVDD - IOVDD +3.3V
27 ED2/PC2 I/O 91 MA17 O
28 ED3/PC3 I/O 92 MA16 O
29 ED4/PC4 I/O 93 MA15 O
30 ED5/PC5 I/O 94 MA14 O
31 ED6/PC6 I/O 95 MA13 O
32 ED7/PC7 I/O 96 MA12 O
33 VSS - VSS 97 MA11 O External memory address bus
34 IRQ0N/PH0 I Interrupt input 98 MA10 O
35 TxD0 O Serial output 99 MA09 O
36 RxD0 I serial input 100 MA08 O
37 TxD1/PG2 O Serial output 101 MA07 O
38 RxD1/PH1 I serial input 102 MA06 O
39 SCLK1/PH2 I External synchronization clock 103 MA05 O
40 SD0 O Serial output 104 VSS - VSS
41 SDI/PH3 I serial input 105 MA04 O
42 BCLK O Bit clock output 106 MA03 O External memory address bus
43 WCLK/SY0 O Word clock output 107 MA02 O
44 SYSCLK/PG3 O Clock output 108 MA01 O
45 VSS - VSS 109 CS0N/PG0 O External memory chip select
46 VDD - VDD +2.5V 110 MA18 O
47 IOVDD - IOVDD +3.3V 111 MA19 O
External memory address bus
External memory address bus
48 PA0 I/O
I/O port
112 MA21/PF1 O
49 PA1 I/O 113 MA22/PF2 O
50 PA2 I/O 114 MA20 O
51 PA3 I/O 115 MA23/PF3 O
52 PA4 I/O 116 CS1N/PG1 O External memory chip select
53 PA5 I/O 117 MA00/PF0 O
54 PA6 I/O 118 VSS - VSS
55 PA7 I/O 119 VDD - VDD +2.5V
56 VSS - VSS 120 IOVDD - IOVDD +3.3V
57 PB0 I/O
I/O port
121 CS2N/PE0 O
58 PB1 I/O 122 CS3N/PE1 O
59 PB2 I/O 123 CS4N/CASN/PE2 O
60 PB3 I/O 124 CS5N/PE3 O
61 PB4 I/O 125 CS50RDN/PE4 O External memory chip select
62 PB5 I/O 126 CS51WRN/PE5 O
63 PB6 I/O 127 CS52WRN/PE6 O
64 PB7/SYI I/O 128
CS53WRN/RASN/PE7 O
YMW767-VTZ (X6055A00) CPU
DMLCD: IC301

17
DGX-220/YPG-225
AK4385ET (X6040A00) DAC (Digital to Analog Converter)
PIN
NO. NAME I/O FUNCTION PIN NO. NAME I/O FUNCTION
1 MCLK I Master Clock 9 AOUTR- O Rch Analog out(-)
2 BICK I Audio Serial Data Clock 10 AOUTR+ O Rch Analog out(+)
3 SDTI I Audio Serial Date Input 11 AOUTL- O Lch Analog out(-)
4 LRCK I L/R Clock 12 AOUTL+ O Lch Analog out(+)
5 PDN I Power Down mode 13 Vss - Ground
6 CSN I Chip Select 14 VDD - Power Supply
7 CCLK I Control Data Input 15 DZFR O Rch Data Zero Input Detect
8 CDTI I Control Data Input 16 DZFL O Lch Data Zero Input Detect
●DMLCD:IC501
• NT3881DFG-01 (X3148A00) LCD DRIVER
DMLCD:IC601
PIN NO.
NAME I/O FUNCTION
PIN NO.
NAME I/O FUNCTION
1 S22
S21
S19
S18
S17
S16
S15
S14
S12
S11
S10
S9
S8
S7
S6
S4
S3
S2
S1
S5
S13
S20
O41DB2 I/O
I/O
I/O
I/O
I/O
I/O
2O42 DB3
3O43 DB4 Data interface
4O44 DB5
5O45 DB6
6O46 DB7
7O47 C1 O
8O48 C2 O
9O49 C3 O
10 O50 C4 O
11 OSegment signal output for LCD 51 C5 O
12 Odriving 52 C6 O
13 O53 C7 O
14 O54 C8 O Common signal output for LCD
15 O55 C9 Odriving
16 O56 C10 O
17 O57 C11 O
18 O58 C12 O
19 O59 C13 O
20 O60 C14 O
21 O61 C15 O
22 O62 C16 O
23 Vss Ground 63 S40 O
24 OSC1 IOscillator 64 S39 O
25 OSC2 OOscillator 65 S38 O
26 V1
V2
V3
V4
V5
66 S37 O
27 67 S36 O
28 Power supply 68 S35 O
29 69 S34 O
30 70 S33 O
31 CLK1
CLK2
OData latch clock 71 S32 O Segment signal output for LCD
32 OData shift clock 72 S31 O driving
33 Vdd Power supply (+5 V) 73 S30 O
34 M OAlternated signal for LCD driver output 74 S29 O
35 D ODisplay data interface 75 S28 O
36 RS I76 S27 O
37 R/W IRead/write 77 S26 O
38 E IEnable 78 S25 O
39 DB0 I/O
I/O
Data interface 79 S24 O
40 DB1 Data interface 80 S23 O

18
DGX-220/YPG-225
■IC BLOCK DIAGRAM
SN74LV32APWR (X5647A00)
Quad 2 Input OR
DMLCD:IC207
1
2
3
1A
1Y
42A
52B
62Y
7 GND
1B
14
13
12
Vcc
4A
11 4Y
10 3B
93A
83Y
4B
SN74LV138APWR(X7284A00)
DECODER
DMLCD: IC401,402
ENABLEINPUTS
G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
H
H
H
L
H
H
H
H
H
H
H
X
X
X
L
L
H
H
L
L
H
H
X
X
X
L
L
L
L
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
X
X
L
H
H
H
H
H
H
H
H
X
H
X
L
L
L
L
L
L
L
L
X
X
X
L
H
L
H
L
H
L
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
SELECTINPUTS
OUTPUTS
1
2
3
4
5
6
7
A
B
Select
Enable
Output
B
CC
G2A G2A
G2B G2B
G1 G1
Y7 Y7
16
15
14
13
12
11
10
Vcc
Y0Y0
Y1Y1
Y2Y2
Y3 Output Y3
Y4Y4
Y5Y5
8
GND 9Y6
A
Y6
BA4510F-E2 (X7300A00)
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
+-
+-
DMLCD: IC502
-OUT2
+OUT2
RIPPLE
FILTER
BIAS
CIRCUIT
STANDBY
SW
POP NOISE
PREVENTION
CIRCUIT
PREDRIVER
PREDRIVER
POWER
POWER
LOAD SHORT
PROTECTOR
OUTPUT PIN TO V
CC
SHORT PROTECTOR
OUTPUT PIN TO V
CC
SHORT PROTECTOR
OUTPUT PIN TO GND
SHORT PROTECTOR
OUTPUT PIN TO GND
SHORT PROTECTOR
PREDRIVER
PREDRIVER
POWER
POWER
OVER VOLTAGE/
SURGE
THERMAL
SHUT DOWN
LOAD SHORT
PROTECTOR
V
CC
-OUT1
+OUT1
POWER
GND2
+
-
IN
+
-
IN
IN2
POWER
GND1
14
2
1
3
4
6
7
5
8
10
9
11
12
13
IN1
PRE-GND
STBY
ON TIME POP
PWR-GND2
PWR-GND1
V
CC DC
LA4625 (XY209A00)
Power Amplifier
AMJK: IC551

19
DGX-220/YPG-225
CONTENTS
AM (AMJK 1/6) Circuit Board (X7176C0)......................................... 22
AMJK 4/6 (Master Volume) Circuit Board (X7176C0) ...................... 22
AMJK 5/6 (Standby/ON) Circuit Board (X7176C0) .......................... 22
DMLCD Circuit Board (X7174C0) .................................................... 20
MK-76H Circuit Board (X2333F0) .................................................... 25
MK-76L Circuit Board (X2334F0) ..................................................... 27
PB (AMJK 6/6) Circuit Board (X7176C0) ......................................... 21
PN 2/5 (Rotary Encoder) Circuit Board (X7178C0) ......................... 24
PNL (PN 3/5) Circuit Board (X7178C0)............................................ 23
PNR (PN 1/5) Circuit Board (X7178C0) ........................................... 24
TWL (PN 4/5, 5/5) Circuit Board (X7178C0) .................................... 21
TWR (PN 4/5, 5/5) Circuit Board (X7178C0) ................................... 21
USB (AMJK 3/6) Circuit Board (X7176C0)....................................... 20
■CIRCUIT BOARDS

20
DGX-220/YPG-225
to PN 4/5,5/5(TWR)
to WOOFER R
SUNTAIN USB
to DMLCD-CN802
Cut the patterns.
C855
R817 R818C855
Fix by bond.
Fix by bond.
Pattern side
to DMLCD CN803 2pin
●DMLCD Circuit Board
Component Side
Component Side
Note: See parts list for details of circuit board component parts. USB (AMJK 3/6): 2NA-WG23590
●USB (AMJK 3/6) Circuit Board
NC
NC
to MK-76L-CN4
to MK-76L-CN5 to MK-76H-CN1
to AMJK 1/6(AM)-CN155
NC to AMJK 3/6(USB)-CN874
to PN 3/5(PNL)-CN784 NC to PN 1/5(PNR)-CN781
to USB (AMJK 3/6)-J851
Coil (WH469300) is attached to
the pad of R817 and R818.
Install it with this direction.
Coil
(WH469300)
L803