Yamaha PSR-S550 User manual

SERVICE MANUAL
HAMAMATSU, JAPAN
Copyright (c) Yamaha Corporation. All rights reserved. ’08.08
PK 001810
CONTENTS（目次）
SPECIFICATIONS ..................................................................... 3
PANEL LAYOUT ........................................................................ 4
CIRCUIT BOARD LAYOUT & WIRING
................................... 6
EXTENSION CABLE FOR SERVICE USE
.............................................. 7
BLOCK DIAGRAM........................... 8
DISASSEMBLY PROCEDURE.............................. 9
LSI PIN DESCRIPTION............................. 16
IC BLOCK DIAGRAM  20
CIRCUIT BOARDS...................................... 21
TEST PROGRAM ................................................................... 33
INITIALIZATION ...................................................................... 37
DATA BACKUP ........................................................................ 38
SYSTEM BOOTING FLOW CHART ....................................... 43
MIDI IMPLEMENTATION CHART
..................... 44
MIDI DATA FORMAT ............................................................... 45
PA RTS LIST
OVERALL CIRCUIT DIAGRAM
PSR-S550 PSR-S550B

2
PSR-S550/PSR-S550B
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.
WARNING: This product contains chemicals known to the State of California to cause cancer, 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.
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
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
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
WARNING

3
PSR-S550/PSR-S550B
■ SPECIFICATIONS
Keyboards
•61 Standerd-size keys (C1–C6), with Touch Response.
Display
•320 x 240 dots LCD display (backlit)
Setup
•STANDBY/ON
•MASTER VOLUME: MIN–MAX
•LCD CONTRAST
Panel Controls
•DEMO, SONG MODE
•SONG-PRESET, SONG-USER, SONG-SCORE,
SONG-LYRICS, SONG-REC
•STYLE CATEGORY, VOICE CATEGORY
•TRANSPOSE [-] [+], METRONOME, TAP TEMPO, TEMPO [-]
[+]
•OTS LINK, AUTO FILL IN, ACMP, INTRO [1]–[3], MAIN VARI-
ATION [A]–[D], ENDING/rit. [1]–[3] (REW) (FF), SYNC STOP
(A-B REPEAT), SYNC START (PAUSE), START/STOP
•REGIST/PART [MIXER], MEMORY, REGIST BANK [-] [+],
REGISTRATION MEMORY [1]–[8], STYLE [1] - [8], SONG
[1/9] - [8/16], EXIT, CATEGORY [ ] [ ], Dial, [+/YES] [-/NO]
•EXECUTE, MDB, FILE MENU, FUNCTION, ONE TOUTCH
SETTING [1]–[4], LEFT, DUAL, HARMONY, TOUCH,
SUSTAIN, DSP, UPPER OCTAVE [-] [+]
Realtime Control
•Pitch Bend Wheel
Voice
•294 Voices + 12 Drum Kits + 10 SFX Kits + 480 XG Voices
(Included 11 Regional Voices and 8 Regional Drum/Percussion
Kits)
•Polyphony: 64
•LEFT
•DUAL
Style
•176
•Style Control: ACMP ON/OFF, SYNC STOP, SYNC START,
START/STOP, INTRO [1]–[3], MAIN VARIA-
TION [A]–[D], ENDING/rit. [1]–[3], AUTO FILL IN
•Fingering: Multi Finger, Full Keyboard
•Style Volume
Music Database
•600
Registration Memory
•8banks x 8 memories
•Regist Clear
Effects
•Harmony: 26 types
•Reverb: 35 types
•Chorus: 44 types
•DSP: 237 types
Song
•5Preset Songs + User Songs + USB Memory
•Song Clear, Track Clear
•Song Volume
•Song Control: A-B REPEAT, PAUSE, REW, FF, START/STOP
Recording
•Song
User Song: 5 Songs
Recording Tracks: 1
- 16, STYLE
MIDI
•Local On/Off
• Initial Setup
• External Clock
•Keyboard Out
• Style Out
• Song Out
Auxiliary jacks
•PHONES/OUTPUT, DC IN 16V, USB TO HOST,
USB TO DEVICE, SUSTAIN
Amplifier
•12W x 2
Speakers
•(12cm + 3cm) x 2
Power Consumption
•25W
Power Supply
•Adaptor: Yamaha PA-301 or PA-300 AC power adaptor
Dimensions (W x D x H)
•946 x 402 x 130 mm (37-1/4" x 15-7/8" x 5-1/8")
Weight
•7.5kg (16 lbs., 9 oz.)
Supplied Accessories
•Music Rest
• Accessory CD-ROM
•Keyboard Stand: L6
•Foot Switch: FC4/FC5
• Owner’s Manual
•AC Power adaptor (May not be included depending on your par-
ticular area.)
Optional Accessories
•Headphones: HPE-150
•Style Creator
Function
•VOLUME: Style Volume, Song Volume
•OVERALL: Tuning, Pitch Bend Range, Split Point, Touch
Sensitivity, Chord Fingering
•MAIN VOICE: Volume, Octave, Pan, Reverb Level,
Chorus Level, DSP Level, Dry Level
•DUAL VOICE: Volume, Octave, Pan, Reverb Level,
Chorus Level, DSP Level, Dry Level
•LEFT VOICE: Volume, Octave, Pan, Reverb Level,
Chorus Level, DSP Level, Dry Level
•EFFECT: Reverb Type, Chorus Type, DSP Type, Master
EQ Type
•HARMONY: Harmony Type, Harmony Volume
•PC: PC Mode
•MIDI: Local On/Off, External Clock, Keyboard Out,
Style Out, Song Out, Initial Setup
•METRONOME: Time Signature Numerator, Time Signature
Denominator, Bell On/Off, Metronome Volume
•SCORE: Quantize, Right-Part, Left-Part
•UTILITY:
•LANGUAGE: Language
Demo Cancel, TG Mode
Mixer
•Volume, Pan, Reverb, Chorus
•Style Creator
•USB

4
PSR-S550/PSR-S550B
■ PANEL LAYOUT
q
w
et i !1
!2 !3
!4
o
#2
!5 !6
!0
#3
r
!7
y u
q[STANDBY/ON] switch
w[MASTER VOLUME] control
e[DEMO] button
r[SONG MODE] button
tSONG
[PRESET], [USER], [SCOPE]
[LYRICS] buttons
y[USB] button
u[REC] button
iSTYLE
oSTYLE CONTROL
[OTS LINK], [AUTO FILL IN], [ACMP]
INTRO[I]-[III], MAIN VARIATION [A]-[D]
ENDING/rit. [I]-[III], [SYNC STOP]
[SYNC START], [START/STOP] buttons
!0 SONG CONTROL
[ ], [ ], [A B], [ ], [ / ] buttons
!1 TRANSPOSE [+] and [ - ] buttons
!2 [METRONOME] button
!3 [TAP TEMPO] button
!4 TEMPO [+] and [ - ] buttons
!5 [REGIST/PART[MIXER]] button
!6 [MEMORY] button
!7 REGIST BANK [+] and [ - ] buttons
!8 Style Part/Song Part [1/9]-[8/16]/
REGISTRATION MEMORY [1] - [8] buttons
!9 DISPLAY
@0 [EXIT] button
• Front Panel

5
PSR-S550/PSR-S550B
@9
!8
!9
@4 @5
#0
#1
@6 @7
@2
@8
@1
@0
@3
#4 #5 #6 #7 #8
Rear Panel
@1 Dial
@2 [+/YES] and [ - /NO] buttons
@3 CATEGORY [ ] and [ ] buttons
@4 [EXECUTE] button
@5 [MDB] button
@6 [FILE MENU] button
@7 [FUNCTION] button
@8 ONE TOUCH SETTING [1] - [4] buttons
@9 VOICE
#0 VOICE CONTROL
[LEFT], [DUAL], [HARMONY], [TOUCH]
[SUSTAIN], [DSP] buttons
#1 UPPER OCTAVE [+] and [ - ] buttons
#2 [PITCH BEND] wheel
#3 Drum Kit
#4 SUSTAIN jack
#5 USB TO HOST and TO DEVICE terminals
#6 CONTRAST knob
#7 PHONES/OUTPUT jack
#8 DC IN 16V jack
• Rear Panel



6
PSR-S550/PSR-S550B
■CIRCUIT BOARD LAYOUT & WIRING（ユニットレイアウト及び結線図）
61L 61H
ENC PNCDM MVR
PB
PSW
500510530
TWTW JACK
550
W401 540
PNR
30
L30 L40L50
PNL
AM
520560
• Upper Case Assembly









Ass’y


• Lower Key Bed Assembly













Ass’y



7
PSR-S550/PSR-S550B
No. Ref. Part No. Assembly Destination Remarks
No.    
130 (WH33630)
*1
SP JACK-CN453 SP(WF) 4P
2500 WJ465900 FFC4 PNL-CN102
*2
PNR-CN301
*2
14P
3510 WJ466000 FFC5 PNC-CN202
*2
PNL-CN101
*2
21P
4520 WQ075900 FFC2 DM-CN701
*2
PNL-CN103
*2
7P
5530 WJ465800 FFC3 DM-CN901
*2
AM-CN104
*2
27P
6540 (WJ46010)
*1
JKAM AM-CN101 JACK-CN451 10P
7550 WJ465600 FFC1 DM-CN501
*2
JACK-CN403
*2
14P
8560 WH336400 LCD AM-CN102 LCD 2P
9L30 WE13850R MK1 DM-CN801 61H-CN1 12P L=220
10 L40 WE13870R MK2 DM-CN803 61H-CN2 5P L=250
11 L50 WE13880R MK3 DM-CN802 61L-CN5 7P L=190
12 W401 (WJ45910)
*1
GND JACK(Soldered) FG L=70
*1: The parts with "( )" in "Part No." are not available as service parts.

*2: Edge mark is adjusted to pin 1 mark(왕mark).
왕
■EXTENSION CABLE FOR SERVICE USE（サービス用延長ケーブル）
JK-AM e
JK-AM e
xtension cab
xtension cab
leJK-AM extension cable
AM-DM e
AM-DM e
xtension cab
xtension cab
leAM-DM extension cable
Check the AM circuit board and the DM circuit board by using the following extension cables.


V8973600 JUMPER WIRE FVP=2.0C26SB10-400
2. AM-DM extension cable
WG123900 FFC CABLE P-70 
DM

8
PSR-S550/PSR-S550B
■ BLOCK DIAGRAM（ブロックダイアグラム）
28CA1-2001035400
PNC
ENC
PSW
PNL
PNR
DM
61L
JACK 2/2
CN403-14P
CN501-14P
SUSTAIN TO DEVICE TO HOST CONTRAST
JK401 CN401 CN402
VR401
USB
LCD
BACKLIGHT
LCD
UNIT
SW & LED
Matrix
LED
DRIVER
TR101-115
CPU
IC101(64P)
SW & LED
Matrix SW & LED
Matrix ROTARY
ENCODER
PA- 301
AC ADAPTER
AC IN
TW-L
3cm
TW-R
3cm
WF-R
12cm
8Ω
WF-L
12cm
8Ω
EC301
JK451
+16V
+5V
Regulator
+5A
6
14
11,13
1
1
2
1
3
8,9
+5D_2
+5LD
+5D
+5D
VR320
+5LD
+5A
+5A
RD/WRN,/WE0,/WE1/RASL,
/CASL,CKIO,CKE
PNL_IC
D[0-15]
AD[0-25]
PITCH_BEND
/ENC-A,ENC-B
/DAC-IC
SYSCLK(LCDC)
+ 3.3D
+1.2V
+3.3V
Regulator
+1.2V
Regulator
IC14-16P
DAC
24bit
ROM
256Mbit(*1)
Wave
IC13-14P
Level
Converter
IC17-44P
Key Scan CPU
MKS
CPU
SWX2
DC/DC
Converter IC4-64P
LCDC
ROM
128MBit(*1)
Program
FLASH ROM
16MBit(*2)
Data
SDRAM
128MBit(*3)
IC13,IC24-14P
Level
Converter
IC7-316P
IC1-3P
IC6-3P
IC19-8P
IC9-56P IC10-48P IC8-54P
Keyboard 61Key 16N
with touch response
BUS Clk 67.7376MHz
Int. Clk 135.4752MHz
Ext. Clk 33.8688MHz
5MHz
Ceramic
IC5-5P
Reset
IC18-5P
USB
Bus Power
Controller
48MHz
Crystal OSC
16.9344MHz
Crystal OSC
IC16-8P
LPF
+3.3D
+3.3D
+3.3D
PNL_IC
+29V
VBUS
FUNCTION D+,D- FUNC_DP,DM
HOST_DP,DM
OVER_CUR_N
POWER_ENB
PK2
PD6
SDO0
WCLK
BCLK
SYSCLK
PK0,PK1
*B
*C
AN3
PD7
6
5
*A39
RxD0
PD3
PEDAL
VEE1
/LCD_OFF
/LCD_IC
/CS4
/WE0,/RD
D[0-7]
A[0-15]
/CS0
/CS5
/CS3
D[0-15]
D[0-15]
A[1-20]
A[1-14]
/DTA-WP
/WE1,/RD
/H-RES
/PRG-WP
D[0-15]
A[1-23]
/WE1,/RD
/H-RES
SYSCLK
+3.3D
43
14
+3.3D
37
+3.3D
+5D
1,3,9,14
27,43,49
FPFRAME
FPLINE
FPSHIFT
MOD
FPDAT[0-3]
VBUS
VBUS
to Device D+, D-
to Host D+, D-
/WAIT
B[7-11]
B[1-7]
N[11-16]
N[21-26]
RD2
CS4N
CS0N
CS5N
CS3N
A[0-25]
D[0-15]
PG2
PG7
RDN
WE1N
WE0N
PK7
TxD0
RESN
XTAL
EXTAL
VBUS
VEE2
+5V,500mA
+20 - 26V
HOST D+,D-
IC11-56P
+1.2D
/H-RES
/H-RES
UCLK
X1
/SCK0
TIO
/RESET
X2
MKS_TX
MKS_SCLK
MKS_REQ
/MKS_IC
/MRD
RxD1
SCK1
TxD1
EICN
/MWR
/MCS0
MA[1-25]
MD[0-15]
+5A
+5D
IC101-5P
IC201-14P
IC102-3P
A Curve
5kΩ
+5V DC/DC
Converter
Power AMP
12W x 2
LA4625
STANDBY/ON
LCD DISPLAY
320 X 240
STN
CN601-14P CN701-7P CN702-3P CN330-4P
CN452-4P
JK452
CN301-3P
CN103-7P CN101-21P
CN202-21P
CN104-27P
CN901-27P
CN455-2P
CN453-4P
CN454-2P
CN102-14P
CN301-14P
CN102-2P
CN204-5P
CN310-5P
CN103-3P
CN320-3P
CN451-10P
CN101-10P
7
+5LD
8MHz
+5LD
PHONES/
OUTPUT
DCIN 16V
MASTER VOLUME
PITCH
BEND
+-
JACK
AM
PB
MVR
1/2
CN802-7P CN801-12P CN803-5P
CN5-7P
CN4-12P
CN3-12P
61H
CN1-12P CN2-5P
+5D
14
14 8
+3.3D
43
+5D
17,38
+5D
4
+5D_2
*A: 7,12,22,25
32,40,48,55
*B: A20,B19,B20,C18,D8,D10
D17,D18,E8,E10,E11,E13
H5,H16,H19,H20,N5,N16
T8,T10,T11,T13,U4,U17
V3,V18,W2,W19Y1,Y20
*C: E5,E6,E15
E16,F5,F16
K5,K16,L5
L16,R5,R16
T5,T6,T15,16

9
PSR-S550/PSR-S550B
■DISASSEMBLY PROCEDURE（分解手順）
Front Side (Printed Side)
 Back Side 
[80A] Lower Case Assembly

[80B] [100A]
[90] [80B]
[90]
[80A]
Upper Case Assembly

Push Knob
 Keyboard Assembly

1. Lower Case Assembly
(Time required: About 2 minutes)
1-1 Remove the six (6) screws marked [80A] , the two (2)
screws marked [100A] and the two (2) screws marked
[90]. The lower case assembly can then be removed.
(Fig.2)
1. 下ケースAss'y
（所要時間：約2分）
1-1 [80A]のネジ6本、[100A]のネジ2本、[90]のネジ2本を外し、
下ケースAss'yを外します。（図2）
Fig.1
Fig.2
 
 
 
（注意）：
•一度剥がしたフィラメントテープは、取り外す前と同じよう
に、取り付けてください。
•フラットケーブルの接点が裏側から透けて見えます。コネクタ
にケーブルの表、裏を逆に差し込まないように注意して取り付
けてください。（図1）
CAUTION:
•Be sure to attach the removed filament tape just as it was before
removal.
•Contacts are visible from the back. Pay attention not to insert and
install the cable to the connector inversely. (Fig.1)

10
PSR-S550/PSR-S550B
2. AM Circuit Board
(Time required: About 3 minutes)
2-1 Remove the lower case assembly. (See procedure 1.)
2-2 Remove the five (5) screws marked [380B]. The AM
circuit board can then be removed. (Fig.3)
3. JACK Circuit Board
(Time required: About 3 minutes)
3-1 Remove the lower case assembly. (See procedure 1.)
3-2 Remove the AM circuit board. (See procedure 2.)
3-3 Remove the screw marked [380E] at the location of “A”.
(Fig.4)
*As for the screw marked [380E] at the location of “A”, it
is tightened together with a GND terminal. (Fig.4)
3-4 Remove the five (5) screws marked [380A] and the two
(2) screws marked [385]. The JACK circuit board can
then be removed. (Fig.3)
2. AMシート
（所要時間：約3分）
2-1 下ケースAss'yを外します。（1項参照）
2-2 [380B]のネジ5本を外し、AMシートを外します。（図3）
3. JACKシート
（所要時間：約3分）
3-1 下ケースAss'yを外します。（1項参照）
3-2 AMシートを外します。（2項参照）
3-3 Aの位置の[380E]のネジ1本を外します。（図4）
*Aの位置の[380E]のネジはGND端子と共締めされてい
ます。（図4）
3-4 [380A]のネジ5本と[385]のネジ2本を外し、JACKシートを外
します。（図3）
Fig.3
 
 
 
 
[380B]
AM
PSW
[380C]
Tweeter (L)

[380D]
(L)
TW
Tweeter (R)


[380D]
(R)
TW
[40] [40] (Woofer (R))

(Woofer (L))

[100B]
(Lower Key Bed Assembly)
 (Upper Case Assembly)

(Lower Case Assembly)

[385] [380A]
JACK

11
PSR-S550/PSR-S550B
4. DM Circuit Board
(Time required: About 4 minutes)
4-1 Remove the lower case assembly. (See procedure 1.)
4-2 Remove the AM circuit board. (See procedure 2.)
4-3 Remove the four (4) screws marked [380E]. The DM
circuit board can then be removed. (Fig.4)
*As for the screw marked [380E] at the location of “A”, it
is tightened together with a GND terminal. (Fig.4)
4. DMシート
（所要時間：約4分）
4-1 下ケースAss'yを外します。（1項参照）
4-2 AMシートを外します。（2項参照）
4-3 [380E]のネジ4本を外し、DMシートを外します。（図4）
*Aの位置の[380E]のネジ1本はGND端子と共締めされ
ています。（図4）

Fig.4
Encoder knob

Fig.6
5. 液晶ユニット
（所要時間：約5分）
5-1 下ケースAss'yを外します。（1項参照）
5-2 AMシートを外します。（2項参照）
5-3 DMシートを外します。（4項参照）
5-4 [380L]のネジ4本を外し、液晶ユニットを外します。（図5）
6. ENCシート
（所要時間：約4分）
6-1 下ケースAss'yを外します。（1項参照）
6-2 コントロールパネル面からエンコーダツマミを外します。
（図6）
6-3 [380F]のネジ4本を外し、ENCシートを外します。（図4）
[380L]
LCD Unit
 Upper Case Assembly 

Fig.5
5. LCD Unit
(Time required: About 5 minutes)
5-1 Remove the lower case assembly. (See procedure 1.)
5-2 Remove the AM circuit board. (See procedure 2.)
5-3 Remove the DM circuit board. (See procedure 4.)
5-4 Remove the four (4) screws marked [380L]. The LCD
unit can then be removed. (Fig. 5)
6. ENC Circuit Board
(Time required: About 4 minutes)
6-1 Remove the lower case assembly. (See procedure 1.)
6-2 Remove the encoder knob from the control panel.
(Fig. 6)
6-3 Remove the four (4) screws marked [380F]. The ENC
circuit board can then be removed. (Fig.4)
MVR
PB
PNC
PNL PNR
ENC
DM
[380H]
[380G]
[380I] [380J] [380K]
[380F]
[380E]
A

12
PSR-S550/PSR-S550B
7. PSWシート
（所要時間：約3分）
7-1 下ケースAss'yを外します。（1項参照）
7-2 [380C]のネジ2本を外し、PSWシートを外します。（図3）
7-3 PSWシートからプッシュツマミ（黒)を外します。（図2）
8. TWシート、スピーカ（ツイーター）
（所要時間：各約3分）
8-1 下ケースAss'yを外します。（1項参照）
8-2 [380D]のネジ2本を外し、スピーカ（ツイーター）を外します。
（図3）
*左右のツイーターは、それぞれ同じ方法で外すことができま
す。
9. ホイールAss'y、PB、MVR、PNL、PNC、PNR
シート
9-1 下ケースAss'yを外します。（1項参照）
9-2 [80B]のネジ2本を外します。（図2）
9-3 [100B]のネジ1本を外し、16N鍵盤Assy、下ケース鍵盤
Ass'yを外します。（図3）
9-4 ホイールAss'y、PBシート
（所要時間：約4分）
9-4-1 [380G]のネジ2本を外し、ホイールAss'yと共にPBシートを外
します。（図4）
9-4-2 ホイールAss'yから、PBシートを外します。（図4）
9-5 MVRシート
（所要時間：約4分）
9-5-1 コントロールパネル面からボリュームツマミを外します。（図7）
9-5-2 [380H]のネジ3本を外し、MVRシートを外します。（図4）
9-6 PNLシート
（所要時間：約5分）
9-6-1 [380I]のネジ13本を外し、PNLシートを外します。（図4）
7. PSW Circuit Board
(Time required: About 3 minutes)
7-1 Remove the lower case assembly. (See procedure 1.)
7-2 Remove the two (2) screws marked [380C]. The PSW
circuit board can then be removed. (Fig.3)
7-3 Pull out the push knob (black) from the PSW circuit
board. (Fig.2)
8. TW Circuit Board, Speaker (Tweeter)
(Time required: About 3 minutes each)
8-1 Remove the lower case assembly. (See procedure 1.)
8-2 Remove the two (2) screws marked [380D]. The speaker
(tweeter) can then be removed. (Fig.3)
*The tweeters L and R can be removed in the same
manner.
9. Wheel Assembly, PB, MVR, PNL, PNC, PNR
Circuit Boards
9-1 Remove the lower case assembly. (See procedure 1.)
9-2 Remove the two (2) screws marked [80B]. (Fig.2)
9-3 Remove the screw marked [100B]. The 16N keyboard
assembly and the lower key bed assembly can then be
removed. (Fig.3)
9-4 Wheel Assembly, PB Circuit Board
(Time required: About 4 minutes each)
9-4-1 Remove the two (2) screws marked [380G]. The wheel
assembly with the PB circuit board can then be removed.
9-4-2 Remove the PB circuit board from the wheel assembly.
(Fig. 4)
9-5 MVR Circuit Board
(Time required: About 4 minutes)
9-5-1 Remove the volume knob from the control panel. (Fig.7)
9-5-2 Remove the three (3) screws marked [380H]. The MVR
circuit board can then be removed. (Fig.4)
9-6 PNL Circuit Board
(Time required: About 5 minutes)
9-6-1 Remove the thirteen (13) screws marked [380I].
The PNL circuit board can then be removed. (Fig.4)
Volume Knob

Cloth

Fig.7

13
PSR-S550/PSR-S550B
9-7 PNC Circuit Board
(Time required: About 6 minutes)
9-7-1 Remove the AM circuit board. (See procedure 2.)
9-7-2 Remove the DM circuit board. (See procedure 4.)
9-7-3 Remove the ten (10) screws marked [380J]. The PNC
circuit board can then be removed. (Fig.4)
9-8 PNR Circuit Board
(Time required: About 5 minutes)
9-8-1 Remove the eleven (11) screws marked [380K]. The
PNR circuit board can then be removed. (Fig.4)
10. Speaker (Woofer)
(Time required: About 3 minutes each)
10-1 Remove the lower case assembly. (See procedure 1.)
10-2 Remove the four (4) screws marked [40]. The speaker
(woofer) can then be removed. (Fig.3)
*The woofers L and R can be removed in the same
manner.
11. Disassembling 16N Keyboard Assembly
11-1 Remove the lower case assembly. (See procedure 1.)
11-2 Remove the two (2) screws marked [80B]. (Fig.2)
11-3 Remove the screw marked [100B]. The 16N keyboard
assembly and the lower key bed assembly can then be
removed. (Fig.3)
11-4 White Keys and Black Keys
11-4-1 White and black keys for one octave unit are integrated
as a set. There are five sets in total.
Only the C6 white key, unlike the other keys, is not
integrated in a set. (Fig. 8)
11-4-2 To remove a set, remove the four (4) each screws marked
[120A]. The white and black keys in the set can then be
removed. (Fig. 8)
When removing, unfasten the two (2) hooks at the back
of the black keys upward, and lift the white and black
keys while pulling them toward you a little. (Fig.9)
11-4-3 To remove the white key C6, remove the screw marked
[120B], unhook as described in Procedure 11-4-2, and
pull out toward you. (Fig. 8)
11-5 Rubber Contact
11-5-1 Remove the white and black keys corresponding to the
rubber contacts to be removed. (Fig.8, Photo.1)
11-5-2 Remove the rubber contacts. (Fig.8, Photo.1)
11-6 61L Circuit Board (MK-L)
(Time required: About 7 minutes)
11-6-1 Remove the white and black keys from C1 to B3. (See
Fig.8 and Procedure 11-4.)
11-6-2 Remove the four (4) screws marked [100A] and the eight
(8) screws marked [110A]. The 61L circuit board (MK-
L) can then be removed. (Fig.8)
9-7 PNCシート
（所要時間：約6分）
9-7-1 AMシートを外します。（2項参照）
9-7-2 DMシートを外します。（4項参照）
9-7-3 [380J]のネジ10本を外し、PNCシートを外します。（図4）
9-8 PNRシート
（所要時間：約5分）
9-8-1 [380K]のネジ11本を外し、PNRシートを外します。（図4）
10. スピーカ（ウーファー）
（所要時間：各約3分）
10-1 下ケースAss'yを外します。（1項参照）
10-2 [40]のネジ4本を外し、スピーカ（ウーファー）を外します。（図3）
*左右のウーファーは、それぞれ同じ方法で外すことができま
す。
11. 16N鍵盤Ass'yの分解
11-1 下ケースAss'yを外します。（1項参照）
11-2 [80B]のネジ2本を外します。（図2）
11-3 [100B]のネジ1本を外し、16N鍵盤Ass'y、下ケース鍵盤
Ass'yを外します。（図3）
11-4 白鍵、黒鍵
11-4-1 白鍵、黒鍵は、左側から1オクターブ単 位 のセットになってい
て、全部で5セットあります。
C6鍵は、白鍵1個のみです。（図8）
11-4-2 セットのものは、[120A]のネジ4本づつ外してそれぞれ1セッ
ト分の白鍵、黒鍵を外します。（図8）
この時、黒鍵の後ろ側にある2つのフックを上方向に外し、
白鍵・黒鍵を少し手前に引きながら持ち上げます。（図9）
11-4-3 C6の白鍵は[120B]のネジ1本を外し、11-4-2項のようにフッ
クを外して手前に引きながら外します。（図8）
11-5 接点ゴム
11-5-1 外そうとする接点ゴムに対応した白鍵・黒鍵を外します。
（図8、写真1）
11-5-2 それぞれの接点ゴムを外します。（図8、写真1）
11-6 シート61L（MK-L）
（所要時間：約7分）
11-6-1 C1〜B3の白鍵・黒鍵を外します。（図8、11-4項参照）
11-6-2 [100A]のネジ4本と[110A]のネジ8本を外し、シート61L
（MK-L）を外します。（図8）

14
PSR-S550/PSR-S550B
 
 
 
Fig.8
Hook

Rubber contact

61H
Fig.9
C6 Key
  
One octave

(C1-B1)
One octave

(C2-B2)
One octave

(C3-B3)
One octave

(C4-B4)
One octave

(C5-B5)
[120A] [120A] [120A] [120A] [120A] [120B]
C1 C2 B2 C3 B3 C4 B4 C5 B5 C6B1
[110A] [110B]
[100A] [100B]
61H61L
Rubber Contact 12P
  
Rubber Contact 12P
  
Rubber Contact 13P
  
Lower Key Bed Assembly

Keyboard Assembly


15
PSR-S550/PSR-S550B
*When installing the 61L circuit board (MK-L), tighten
the screws 1 through 12 in numerical order as shown
in the figure "61L" in Fig.10. (Fig.10)
11-7 61H Circuit Board (MK-H)
(Time required: About 6 minutes)
11-7-1 Remove the white and black keys from C4 to C6. (See
Fig.8 and Procedure 11-4.)
11-7-2 Remove the three (3) screws marked [100B] and the five
(5) screws marked [110B]. The 61H circuit board (MK-
H) can then be removed. (Fig.8)
*When installing the 61H circuit board (MK-H),
tighten the screws 1 through 8 in numerical order as
shown in the figure "61H" in Fig.10. (Fig. 10)
**
**
*シシ
シシ
シーー
ーー
ー
トト
トト
ト61L61L
61L61L
61L
（（
（（
（MK-LMK-L
MK-LMK-L
MK-L））
））
）
をを
をを
を取取
取取
取りり
りり
り付付
付付
付けけ
けけ
けるる
るる
る時時
時時
時はは
はは
は、、
、、
、
図図
図図
図1010
1010
10のの
のの
のシシ
シシ
シーー
ーー
ー
トト
トト
ト
61L61L
61L61L
61L図図
図図
図のの
のの
の番番
番番
番号号
号号
号11
11
1〜〜
〜〜
〜1212
1212
12のの
のの
の順順
順順
順にに
にに
にネネ
ネネ
ネジジ
ジジ
ジをを
をを
を締締
締締
締めめ
めめ
めてて
てて
て下下
下下
下ささ
ささ
さいい
いい
い。。
。。
。
（（
（（
（図図
図図
図1010
1010
10））
））
）
11-7 シート61H（MK-H）
（所要時間：約6分）
11-7-1 C4〜C6の白鍵・黒鍵を外します。（図8、11-4項参照）
11-7-2 [100B]のネジ3本と[110B]のネジ5本を外し、シート61H
（MK-H）を外します。（図8）
**
**
*シシ
シシ
シーー
ーー
ー
トト
トト
ト61H61H
61H61H
61H
（（
（（
（MK-HMK-H
MK-HMK-H
MK-H））
））
）
をを
をを
を取取
取取
取りり
りり
り付付
付付
付けけ
けけ
けるる
るる
る時時
時時
時はは
はは
は、、
、、
、
図図
図図
図1010
1010
10のの
のの
のシシ
シシ
シーー
ーー
ー
トト
トト
ト
61H61H
61H61H
61H図図
図図
図のの
のの
の番番
番番
番号号
号号
号11
11
1〜〜
〜〜
〜88
88
8のの
のの
の順順
順順
順にに
にに
にネネ
ネネ
ネジジ
ジジ
ジをを
をを
を締締
締締
締めめ
めめ
めてて
てて
て下下
下下
下ささ
ささ
さいい
いい
い。。
。。
。
（（
（（
（図図
図図
図1010
1010
10））
））
）
10 11 12
2456
9678
3
61H61L
811 3 4 5 27
Photo.1
Fig.10
Rubber contact

61H

16
PSR-S550/PSR-S550B
CONTENTS（目次）
● AK4385ET (X6040A01) DAC ....................................................................................... 16
● MN101C027YB (XS71120R) CPU ............................................................................... 16
● R8A0232BG (X8810A00) CPU (SWX02) ..................................................................... 17
● S1D13700F01A100 (X5422A00) LCD CONTROLLER ............................................... 19
● UPD789022GB-A15-8E (XZ56010R) CPU (MKS) ....................................................... 19
■LSI PIN DESCRIPTION（LSI 端子機能表）
AK4385ET (X6040A01) DAC (Digital to Analog Converter)
PIN
NO. NAME I/O FUNCTION PIN
NO. NAME I/O FUNCTION
1MCLK I Master Clock 9 AOUTR- O Rch Analog out(-)
2BICK I Audio Serial Data Clock 10 AOUTR+ O Rch Analog out(+)
3SDTI I Audio Serial Date Input 11 AOUTL- O Lch Analog out(-)
4LRCK I L/R Clock 12 AOUTL+ O Lch Analog out(+)
5PDN I Power Down mode 13 Vss - Ground
6CSN I Chip Select 14 VDD - Power Supply
7CCLK I Control Data Input 15 DZFR O Rch Data Zero Input Detect
8CDTI I Control Data Input 16 DZFL O Lch Data Zero Input Detect
DM: IC14
PIN
NO. I/O FUNCTIONNAME PIN NO. I/O FUNCTIONNAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
S1
S2
S3
S4
S5
VREF+
VDD
OSC2
OSC1
VSS
XI
XO
MMOD
RD0
RXD
D0
D1
D2
D3
D4
/RST
D5
D6
D7
D8
D9
S6
S7
S8
S9
S10
S11
I
I
I
I
I
-
-
O
I
-
I
O
I
O
I
O
O
O
O
O
I
O
O
O
O
O
I
I
I
I
I
I
Switch matrix data
Power supply (+5V, analog)
Power supply (+5V)
Crystal oscillator (8MHz)
Crystal oscillator (8MHz)
Ground
Not used
Not used
Memory mode select (Grounded)
Rotary encoder data
MIDI receive data
LED and switch drive data
Reset
LED and switch drive data
Switch matrix data
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
S12
S13
S14
TXD
S15
S16
S17
S18
L16
L17
L18
L19
L8
L9
L10
L11
L12
L13
L14
L15
L7
L6
L5
L4
L3
L2
L1
L0
VREF
AD0
AD1
S0
I
I
I
O
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-
I
I
I
Switch matrix data
MIDI transmit data
Switch matrix data
LED drive data
LED and switch drive data
Grounded
Analog input
Analog input
Switch matrix data
MN101C027YB (XS71120R)CPU
PNL:IC101

17
PSR-S550/PSR-S550B
R8A02032BG
(X8810A00)CPU (SWX02)
DM: IC7
PIN
NO. I/O FUNCTIONNAME
OUTER
NO.
PIN
NO. I/O FUNCTIONNAME
OUTER
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
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
-
I
I
-
I
I
I
-
I/O
-
I/O
O
O
I
-
O
I
I
I
-
I/O
-
I
I
-
O
O
-
I/O
-
I/O
I/O
-
-
O
O
I
I
-
-
I/O
I/O
-
-
-
-
I
-
I
-
I
I/O
O
O
O
I
O
-
-
-
I/O
I/O
I/O
-
-
-
I
-
O
-
I
O
O
O
O
I/O
-
-
-
VSS
AN2
AN1
VSS
RxD1
SCK1
UCLK
VSS
FUNC_DM
VSS
HOST_DM
POWER_ENB
XTAL
EXTAL
VSS
CS7N/PJ6
TRSTN
TDI
TCK
VCCQ
MD15
VSS
AN3
AN0
VSS
TxD1
TxD0
VSS
FUNC_DP
VSS
HOST_DP
SCL
VSS
VSS
CS4N/PJ3
TIOC0A/PJ7
TESTN
TMS
VCCQ
VCCQ
MD13
MD14
VSS
VREFADC
VSSADC
VSS
RxD0
VSS
VBUS
VSS
OVER_CURRENT_N
SDA
CS0N
CS2N/PJ1
CS5N/PJ4
ASEMDN
TDO
VCCQ
VDDPLL
VDDPLL
MD10
MD11
MD12
VSS
VCCADC
VSS
RESN
VCCQ
PULLUP_ENB
VCCQ
UCTL
EICN
CS1N/PJ0
CS3N/PJ2
CS6N/PJ5
ASEBRKAKN
VCCQ
VCCQ
VSSPLL
Ground
ADC analog input 2
ADC analog input 1
Ground
Serial input 1
External sync. clock input 1
USB external clock input (48 MHz)
Ground
USB function data -
Ground
USB host data -
USB voltage enable
Crystal oscillator output
Crystal oscillator input (16.9344 MHz)
Ground
SH2A-CPU chip select 7
JTAG test reset input
JTAG test data input
JTAG test clock input
Power supply +3.3 V
Wave memory data bus 15
Ground
ADC analog input 3
ADC analog input 0
Ground
Serial output 1
Serial output 0
Ground
USB function data +
Ground
USB host data +
E bus (I2C) clock input/output (5V compatible)
Ground
SH2A-CPU chip select 4
PWM output
Test input
JTAG test mode select input
Power supply +3.3 V
Wave memory data bus 13
Wave memory data bus 14
Ground
ADC reference power supply +3.3 V
ADC analog ground
Ground
Serial input 0
Ground
USB cable connection monitor (5V compatible)
Ground
USB overcurrent detection (5V compatible)
E bus (I2C) data input/output (5V compatible)
SH2A-CPU chip select 0
SH2A-CPU chip select 2
SH2A-CPU chip select 5
Debug mode configuration
JTAG test data output
Power supply +3.3 V
PLL analog power supply +1.2 V
Wave memory data bus 10
Wave memory data bus 11
Wave memory data bus 12
Ground
ADC analog power supply +3.3 V
Ground
Hardware reset
Power supply +3.3 V
USB pull-up enable
Power supply +3.3 V
USB output control
E bus reset output
SH2A-CPU chip select 1
SH2A-CPU chip select 3
SH2A-CPU chip select 6
Emulator break
Power supply +3.3 V
PLL analog ground
D20
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
F1
F2
F3
F4
F5
F16
F17
F18
F19
F20
G1
G2
G3
G4
G5
G16
G17
G18
G19
G20
H1
H2
H3
H4
H5
H16
H17
H18
H19
H20
J1
J2
J3
J4
J5
J9
J10
J11
J12
J16
J17
J18
J19
J20
K1
K2
K3
K4
K5
K9
K10
K11
K12
K16
K17
K18
K19
K20
-
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
I/O
I/O
-
-
I/O
I/O
I/O
I/O
O
O
O
O
-
-
I/O
I/O
-
-
O
O
O
O
-
-
-
-
-
-
I/O
I/O
I
O
O
O
O
O
-
-
-
-
-
-
O
I/O
-
-
VSSPLL
MD6
MD7
MD8
MD9
VDD
VDD
VSS
VCCQ
VSS
VCCQ
VCCQ
VSS
VCCQ
VSS
VDD
VDD
D31/PF7
D30/PF6
D29/PF5
D28/PF4
MD2
MD3
MD4
MD5
VDD
VDD
D27/PF3
D26/PF2
D25/PF1
D24/PF0
MA2
MA1
MD0
MD1
VSS
VSS
D23/PE7
D22/PE6
D21/PE5
D20/PE4
MA6
MA5
MA4
MA3
VCCQ
VCCQ
D19/PE3
D18/PE2
VCCQ
VCCQ
MA10
MA9
MA8
MA7
VSS
VSS
VSS
VSS
VSS
VSS
D17/PE1
D16/PE0
CKOEN
CKIO
MA14
MA13
MA12
MA11
VDD
VSS
VSS
VSS
VSS
VDD
CKE
D15
VSS
VSS
PLL analog ground
Wave memory data bus 6
Wave memory data bus 7
Wave memory data bus 8
Wave memory data bus 9
Power supply +1.2 V
Ground
Power supply +3.3 V
Ground
Power supply +3.3 V
Ground
Power supply +3.3 V
Ground
Power supply +1.2 V
SH2A-CPU data bus 31
SH2A-CPU data bus 30
SH2A-CPU data bus 29
SH2A-CPU data bus 28
Wave memory data bus 2
Wave memory data bus 3
Wave memory data bus 4
Wave memory data bus 5
Power supply +1.2 V
SH2A-CPU data bus 27
SH2A-CPU data bus 26
SH2A-CPU data bus 25
SH2A-CPU data bus 24
Wave memory address bus 2
Wave memory address bus 1
Wave memory data bus 0
Wave memory data bus 1
Ground
SH2A-CPU data bus 23
SH2A-CPU data bus 22
SH2A-CPU data bus 21
SH2A-CPU data bus 20
Wave memory address bus 6
Wave memory address bus 5
Wave memory address bus 4
Wave memory address bus 3
Power supply +3.3 V
SH2A-CPU data bus 19
SH2A-CPU data bus 18
Power supply +3.3 V
Wave memory address bus 10
Wave memory address bus 9
Wave memory address bus 8
Wave memory address bus 7
Ground
SH2A-CPU data bus 17
SH2A-CPU data bus 16
Clock output control for SDRAM
Clock output for SDRAM
Wave memory address bus 14
Wave memory address bus 13
Wave memory address bus 12
Wave memory address bus 11
Power supply +1.2 V
Ground
Power supply +1.2 V
Clock enable for SDRAM
SH2A-CPU data bus 15
Ground
80
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

18
PSR-S550/PSR-S550B
PIN
NO. I/O FUNCTIONNAME
OUTER
NO.
PIN
NO. I/O FUNCTIONNAME
OUTER
NO.
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
L1
L2
L3
L4
L5
L9
L10
L11
L12
L16
L17
L18
L19
L20
M1
M2
M3
M4
M5
M9
M10
M11
M12
M16
M17
M18
M19
M20
N1
N2
N3
N4
N5
N16
N17
N18
N19
N20
P1
P2
P3
P4
P5
P16
P17
P18
P19
P20
R1
R2
R3
R4
R5
R16
R17
R18
R19
R20
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
T16
T17
T18
T19
T20
U1
O
O
O
O
-
-
-
-
-
-
I/O
I/O
I/O
I/O
O
O
O
O
-
-
-
-
-
-
I/O
I/O
I/O
I/O
O
O
O
O
-
-
I/O
I/O
I/O
I/O
O
O
O
O
-
-
O
I/O
I/O
I/O
O
O
I
I/O
-
-
O
O
O
O
I/O
I/O
I/O
I/O
-
-
-
-
-
-
-
-
-
-
-
-
O
O
O
O
I/O
MA15
MA16
MA17
MA18
VDD
VSS
VSS
VSS
VSS
VDD
D11
D12
D13
D14
MA19
MA20
MA21
MA22
VSS
VSS
VSS
VSS
VSS
VSS
D7
D8
D9
D10
MA23/PG4
MA24/PG5
MA25/PG6
MA26/PG7
VCCQ
VCCQ
D3
D4
D5
D6
MCS3N/PG3
MCS2N/PG2
MCS1N/PG1
MWRN/PG0
VSS
VSS
RD/WRN
D0
D1
D2
MCS0N
MRDN
BTCHG
PA0
VDD
VDD
WE3N/DQMUU/PH3
RASLN
CASLN
RDN
PA1
PA2
PA3
PA4
VDD
VDD
VSS
VCCQ
VSS
VCCQ
VCCQ
VSS
VCCQ
VSS
VDD
VDD
A0/PH4
WE0N/DQMLL/PH0
WE1N/DQMLU/PH1
WE2N/DQMUL/PH2
PA5
Wave memory address bus 15
Wave memory address bus 16
Wave memory address bus 17
Wave memory address bus 18
Power supply +1.2 V
Ground
Power supply +1.2 V
SH2A-CPU data bus 11
SH2A-CPU data bus 12
SH2A-CPU data bus 13
SH2A-CPU data bus 14
Wave memory address bus 19
Wave memory address bus 20
Wave memory address bus 21
Wave memory address bus 22
Ground
SH2A-CPU data bus 7
SH2A-CPU data bus 8
SH2A-CPU data bus 9
SH2A-CPU data bus 10
Wave memory address bus 23
Wave memory address bus 24
Wave memory address bus 25
Wave memory address bus 26
Power supply +3.3 V
SH2A-CPU data bus 3
SH2A-CPU data bus 4
SH2A-CPU data bus 5
SH2A-CPU data bus 6
Wave memory chip select 3
Wave memory chip select 2
Wave memory chip select 1
Wave memory write enable
Ground
SH2A-CPU read/write enable
SH2A-CPU data bus 0
SH2A-CPU data bus 1
SH2A-CPU data bus 2
Wave memory chip select 0
Wave memory read enable
BOOT ROM switching control
Parallel port A0
Power supply +1.2 V
Writing byte of D31 - D24/Selecting D31 - D24 in case of SDRAM
RAS output for SDRAM
CAS output for SDRAM
SH2A-CPU read enable
Parallel port A1
Parallel port A2
Parallel port A3
Parallel port A4
Power supply +1.2 V
Ground
Power supply +3.3 V
Ground
Power supply +3.3 V
Ground
Power supply +3.3 V
Ground
Power supply +1.2 V
SH2A-CPU address bus 0
Writing byte of D7 - D0/Selecting D7 - D0 in case of SDRAM
Writing byte of D15 - D8/Selecting D15 - D8 in case of SDRAM
Writing byte of D23 - D16/Selecting D23 - D16 in case of SDRAM
Parallel port A5
U2
U3
U4
U5
U6
U7
U8
U9
U10
U11
U12
U13
U14
U15
U16
U17
U18
U19
U20
V1
V2
V3
V4
V5
V6
V7
V8
V9
V10
V11
V12
V13
V14
V15
V16
V17
V18
V19
V20
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
W14
W15
W16
W17
W18
W19
W20
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
Y10
Y11
Y12
Y13
Y14
Y15
Y16
Y17
Y18
Y19
Y20
I/O
I/O
-
I/O
I/O
I/O
I/O
I
I
O
I
O
O
O
O
-
O
O
O
I/O
I/O
-
I/O
I/O
I/O
I/O
I/O
I
I
O
I
I
O
O
O
O
-
O
O
I/O
-
I/O
I/O
I/O
I/O
I/O
I/O
I
I
O
O
I
O
O
O
O
O
-
O
-
I/O
I/O
I/O
I/O
I/O
I/O
I
I
O
O
O
I
O
O
O
O
O
O
-
PA6
PA7
VCCQ
ED1/PC1
ED5/PC5
ED9/PD1
ED13/PD5
EA2/PK1
ECSN
BCLK
IRQ0
A25
A21
A17
A13
VCCQ
A3
A2
A1
PB0
PB1
VCCQ
PB6
ED2/PC2
ED6/PC6
ED10/PD2
ED14/PD6
EA3/PK2
SDI0/PK5
WCLK2/SDO2
IRQ1
BW_MD0
A22/PH5
A18
A14
A10
VCCQ
A5
A4
PB2
VCCQ
PB4
PB7
ED3/PC3
ED7/PC7
ED11/PD3
ED15/PD7
ERDN/PK3
SDI1/PK6
WCLK
SYSCLK2
WAITN/PK7
A23/PH6
A19
A15
A11
A8
VCCQ
A6
VCCQ
PB3
PB5
ED0/PC0
ED4/PC4
ED8/PD0
ED12/PD4
EA1/PK0
EWRN/PK4
SDO0
SDO1
SYSCLK
SYI
A24/PH7
A20
A16
A12
A9
A7
VCCQ
Parallel port A6
Parallel port A7
Power supply +3.3 V
External CPU data bus 1
External CPU data bus 5
External CPU data bus 9
External CPU data bus 13
External CPU address bus 2
External CPU chip select
Bit clock output
Interrupt input 0
SH2A-CPU address bus 25
SH2A-CPU address bus 21
SH2A-CPU address bus 17
SH2A-CPU address bus 13
Power supply +3.3 V
SH2A-CPU address bus 3
SH2A-CPU address bus 2
SH2A-CPU address bus 1
Parallel port B0
Parallel port B1
Power supply +3.3 V
Parallel port B6
External CPU data bus 2
External CPU data bus 6
External CPU data bus 10
External CPU data bus 14
External CPU address bus 3
Serial audio input 0
Word clock output 2/Serial audio output 2
Interrupt input 1
SH2A-CPU data bus width configuration
SH2A-CPU address bus 22
SH2A-CPU address bus 18
SH2A-CPU address bus 14
SH2A-CPU address bus 10
Power supply +3.3 V
SH2A-CPU address bus 5
SH2A-CPU address bus 4
Parallel port B2
Power supply +3.3 V
Parallel port B4
Parallel port B7
External CPU data bus 3
External CPU data bus 7
External CPU data bus 11
External CPU data bus 15
External CPU read enable
Serial audio input 1
Word clock output
Clock output 2
External wait input
SH2A-CPU address bus 23
SH2A-CPU address bus 19
SH2A-CPU address bus 15
SH2A-CPU address bus 11
SH2A-CPU address bus 8
Power supply +3.3 V
SH2A-CPU address bus 6
Power supply +3.3 V
Parallel port B3
Parallel port B5
External CPU data bus 0
External CPU data bus 4
External CPU data bus 8
External CPU data bus 12
External CPU address bus 1
External CPU write enable
Serial audio output 0
Serial audio output 1
Clock output
Sync. input from external device
SH2A-CPU address bus 24
SH2A-CPU address bus 20
SH2A-CPU address bus 16
SH2A-CPU address bus 12
SH2A-CPU address bus 9
SH2A-CPU address bus 7
Power supply +3.3 V
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316

19
PSR-S550/PSR-S550B
PIN
NO. I/O FUNCTIONNAME PIN NO. I/O FUNCTIONNAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
VSS
AB12
AB11
AB10
AB9
AB8
HIOVDD
AB7
AB6
AB5
AB4
COREVDD
AB3
AB2
AB1
AB0
VSS
FPDAT3
FPDAT2
FPDAT1
FPDAT0
NIOVDD
FPSHIFT
XECL
COREVDD
FPLINE
MOD
VSS
YSCL
FPFRAME
YDIS
NIOVDD
I
I
I
I
I
I
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
Ground
Address bus
Power supply
Address bus
Power supply
Address bus
Ground
Data bus
Power supply
Shift clock
X driver enable chain clock
Power supply
Latch pulse
Frame signal
Ground
Scan shift clock
Scan start pulse
LCD power-down output
Power supply
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
VSS
XCD1
XCG1
RESET#
SCANEN
TESTEN
CLKI
COREVDD
RD#
WR#
CS#
DB7
DB6
DB5
DB4
HIOVDD
DB3
DB2
DB1
DB0
VSS
WAIT#
HIOVDD
CNF0
CNF1
CNF2
CNF3
CNF4
AS#
AB15
AB14
AB13
O
I
I
I
I
I
I
I
I
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
I
Ground
Drain output
Gate input
Reset
Test mode set up input
Externally sourced system clock
Power supply
Read strobe
Write strobe
Chip select
Data bus
Power supply
Data bus
Ground
Wait output
Power supply
Input pin for S1D 13700 setting
Address strobe
Address bus
S1D13700F01A100 (X5422A00) LCD CONTROLLER
DM: IC4
PIN
NO. I/O FUNCTIONNAME PIN NO. I/O FUNCTIONNAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
P12
P11
P10
P47/KR7
P46/KR6
P45/KR5
P44/KR4
P43/KR3
P42/KR2
P41/KR1
P40/KR0
NC
IC
X2
X1
VSS0
VDD0
/RESET
P53
P52
P51/TO2
P50/TI0/TO0
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I/O
I/O
I/O
I/O
Port 1
Port 4/Key return signal detection input
Internally connected (N.C.)
Clock
Ground
Power supply
System reset
Port 5
Port 5/16-bit timer output
Port 5/External count clock input to 8-bit timer/8-bit timer output
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
P32/INTP2/CPT2
P31/INTP1
P30/INTP0
P22/RXD/SI0
P21/TXD/SO0
P20/ASCK//SCK0
P07
P06
P05
P04
P03
P02
P01
P00
NC
VDD1
VSS1
P17
P16
P15
P14
P13
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
Port 3/External interrupt input/Capture edge input
Port 3/External interrupt input
Port 2/Asynchronous serial interface serial data input/Serial interface serial data input
Port 2/Asynchronous serial interface serial data output/Serial interface serial data output
Port 2/Asynchronous serial interface serial clock input/Serial interface serial clock
Port 0
Power supply
Ground
Port 1
UPD789022GB-A15-8E (XZ56010R) CPU (MKS)
DM: IC17

20
PSR-S550/PSR-S550B
■IC BLOCK DIAGRAM（IC ブロック図）
SN74LV08APWR (X4463A00)
Quad 2 Input AND
1
2
3
1A
1Y
42A
52B
62Y
7
VSS
1B
14
13
12
VDD
4A
11 4Y
10 3B
93A
83Y
4B
DM: IC13
SN74AHCT08PWR (X3824A00)
DM: IC24
SN74LV14APWR (X6688A0R)
Hex Inverter
1
1A
2
1Y
3
2A
4
2Y
5
3A
6
3Y
7
GND
14
VDD
13
6A
12
6Y
11
5A
10
5Y
9
4A
8
4Y
DM: IC20
NJM4580E(TE2) (X2331A0R)
Dual Operational Amplifier
1
2
3
4-V
8
7
6
5
Output A
+V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A
+-
+-
DM: IC16
-OUT2
+OUT2
RIPPLE
FILTER
BIAS
CIRCUIT
STANDBY
SW
POP NOISE
PREVENTION
CIRCUIT
PREDRIVER
PREDRIVER
POWER
POWER
LOAD SHORT
PROTECTOR
OUTPUT PIN TO VCC
SHORT PROTECTOR
OUTPUT PIN TO VCC
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
VCC
-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 (XY209A0R)
Power Amplifier 13.5W
AM: IC201
MC34063EBD-TR (X7371A00)
DC-DC Converter
DM: IC19
SQ
R
Q2
Q1
100
Ipk
Oscillator CT
Comparator
+
±
1.25 V
Reference
Regulator
Drive
Collector
Ipk
Sense
VCC
Comparator
Inverting
Input
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
8
7
6
54
3
2
1
R5520H001B-T1-F (X7569A00)
USB High-Side Power Switch
GATE
CONTROL
5
OUT
3
FLG
2
GND
4
IN
1
EN CURRENT
LIMIT
UVLO
THERMAL
SHUTDOWN
FLAG
DELAY
1 5
2
34
EN
FLG
OUT
IN
GND
DM: IC18