YAMAHA PSR 550 Diagram

SERVICE MANUAL

■ CONTENTS

SPECIFICATIONS.............................................................................. 3

PANEL LAYOUT ................................................................................. 4

CIRCUIT BOARD LAYOUT & WIRING .............................................. 6

BLOCK DIAGRAM ............................................................................. 8

DISASSEMBLY PROCEDURE .......................................................... 9

LSI PIN DESCRIPTION ................................................................... 13

IC BLOCK DIAGRAM....................................................................... 18

CIRCUIT BOARDS .......................................................................... 19

TEST PROGRAM ............................................................................ 28

DATA BACKUP & INITIALIZATION .................................................. 32

ALERT MESSAGE LIST .................................................................. 33

MIDI IMPLEMENTATION CHART .................................................... 35

OVERALL CIRCUIT DIAGRAM PARTS LISTThis document is printed on chlorine free (ECF) paper with soy ink.

PK 001654

1.412K-667 Printed in Japan ’01.05

PSR-550

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 authoriza-tion,

certification, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.

The data provided is believ ed to be accurate and applicab le to the unit (s) indicated on the cov er. The research engineering, and service departments of Yamaha are continually striving to improve Y amaha products. Modifications are , therefor , ine vitable and changes in specification are subject to change without notice or obligation to retrofit. Should an y 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 par ts replacement. Recheck all work before you apply

power to the unit.

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 betw een 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.

■ WARNING

Components having special characteristics are marked Z and must be replaced with parts having specification equal to those originally installed.

■ SPECIFICATIONS

PSR-550

Keyboards

• 61 standard-size keys (C1 — C6) with touch response.

Display

• Large multi-function LCD display

Setup

• STANDBY/ON

• Master Volume : MIN — MAX

Demo

• 9 Songs

Realtime Controls

• Pitch Bend wheel

Control & Number Buttons

• SONG

• STYLE

• MUSIC DATABASE

• VOICE L

• VOICE R1

• VOICE R2

• VOICE CHANGE

• MIXER

• NEXT/BACK

• DIRECT ACCESS

• EXIT

• Data dial, [1] — [0], [+/YES], [-/NO]

Overall Controls

• Tempo : 32 — 280

• Transpose

Voice

• 219 Panel Voices +14 Drum Kits + 480 XG V oices

• Polyphony : 32

• Voice Set

• R1/R2/L Voices

• Part on/off (R1/R2/L)

• Voice Change : Voice number

• Mixer : Volume, Octave, Pan, Reverb Depth, Chorus Depth, DSP Depth

Auto Accompaniment

• 112 Styles

• Accompaniment Track : RHYTHM SUB/ MAIN, BASS, CHORD 1/2, PAD, PHRASE1/2

• Accompaniment Track Settings : ON/OFF

• Accompaniment Control : ACMP ON/OFF, SYNC ST AR T, SYNC STOP, ST AR T/STOP, INTRO, MAIN A/B (A UTO FILL), ENDING/ rit

• Beat Indicator

• Accompaniment Volume

• Voice Change : Voice number

• Mixer : Volume, Pan, Reverb depth, Chorus depth, DSP depth

• One Touch Setting

• Fingering Mode : Multi Finger/Single Finger/Fingered 1/ Fingered 2/Full Keyboard

Music Database

• 220

Multi Pads

• 40 Multi Pad Banks

• 4 Pads + STOP

• Chord Match

• Naming

Digital Effects

• Reverb : 24 types

• Chorus : 16 types

• DSP (system/insertion) : 74 types

• Harmony/Echo : 22 types

Registration Memory

• 32 Registration Banks : 1 — 4

• Naming

• Accompaniment Freeze

Disk Operations

• Song playback/recording

• Load (Style/Multi Pad/Registration Memory)

• Save (Style/Multi Pad/Registration Memory)

• Utility : Format, Song Copy, Delete File

Song

• Song Volume

• Song Track Settings : ON/OFF

• Repeat Play

• Song Transpose

Song Recording

• Quick Record, Multi Record

• Recording Tracks : 1 — 16

• Punch In/Punch Out

• Quantize

• Naming

• Clear

• Setup Data : Volume, Octave, Pan, Re v erb depth, Chorus depth, DSP depth

Multi Pad Recording

• User Pad Bank : 4 (41 — 44)

• Naming

• Clear

• Chord Match

Style Recording

• User Styles : 3 (113 — 115)

• Recording Tracks : 6 Sections x 8 tracks

• Drum Cancel

• Quantize

• Naming

• Clear

MIDI

• Transmit settings

• Receive settings

• Local Control

• Clock

• Initial Data Send

• MIDI template

Other functions

• Metronome

• Upper Octave

• Master Tuning

• Scale Tuning

• Split Point

• Touch Sensitivity

• Voice Set

• Footswitch function

• Pitch Bend Range

Auxiliary Jacks

• DC IN 10-12V, PHONES/OUTPUT, SUSTAIN, MIDI IN/OUT, TO HOST

Amplifiers

• 6W + 6W (when using PA-6 power adaptor)

• 4.5W + 4.5W (when using batteries)

Speakers

• 12 cm (4-3/4") x 2, 3 cm (1-3/16") x 2

Power Consumption

• 22W (when using PA-6 power adaptor)

Power Supply

• Adaptor : Yamaha PA-6 AC power adaptor

Rated V oltage DC 10-12V Rated Current 2A

• Batteries : Six “D” size, R20P (LR20) or equivalent batteries

Dimensions (W x D x H)

• 952 x 387 x 169 (mm) (37-1/2" x 15-1/4" x 6-5/8")

Weight

• 8.7 Kg (19.2 lbs.) excluding batteries

Supplied Accessories

• Data Disk

• Music Stand

• Owner’s Manual

Optional Accessories

• Headphones : HPE-150

• AC Power Adaptor : PA-6

• Foot Switch : FC4, FC5

• Keyboard Stand : L-6, L-7

PSR-550

AS GA

■ PANEL LAYOUT

● Top Panel

#5 #6

#8 #9

001 Gran

CHORD

TRANSPOSE

@1 @2 @3

dim mM

REC2REC3REC4REC5REC6REC7REC8REC

augsus4

KEYBOARDSTART/STOP

513

REGIST-

TEMPO

RATION

BACK

119

!6 !7

NAVI

D138E1

36T37S39F141

CLICK

42 44A145

40 46 49

d Piano

TRACK(1~16)

ASY GATOR

PART

DIAL

MEASURE

BEAT

REC10REC11REC12REC13REC14REC15REC16REC

!8 !9 @0

0~9

/YES

DSP(FAST)

TOUCH

HARMONY

SUSTAIN

5554 56A257

58 61

E364F3

A’

66G367S68 70C472H73

A’

C 2

R 2

74 75

77H78

79H80

81 82

84L85

87D586

91A59392 94B595C696

L M

PSR-550

q Power switch ([STANDBY/ON]) w [MASTER VOLUME] dial e [DEMO] button r [RECORD] button t [DIRECT ACCESS] button y [DSP] button u [FAST/SLOW] button i [TOUCH] button o [SUSTAIN] button !0 [HARMONY/ECHO] button !1 [BACK] button, [NEXT] button !2 LCD display !3 [VOICE CHANGE] button, [MIXER] button !4 [TRACK 1–16] buttons !5 [SONG] button !6 [STYLE] button !7 [MUSIC DATABASE] button !8 [VOICE L] button !9 [VOICE R1] button @0 [VOICE R2] button @1 [ACMP ON/OFF] button @2 [ACMP/SONG VOLUME] button @3 [TEMPO/TAP] button @4 [TRANSPOSE] button

@5 [FUNCTION] button @6 [PART ON/OFF]

• [VOICE L] button

• [VOICE R1] button

• [VOICE R2] button

@7 Number buttons [1]–[0], [–/NO], [+/YES] @8 [EXIT] button @9 Data dial #0 [DISK LOAD] button #1 [DISK SAVE] button #2 [DISK UTILITY] button #3 [SYNC STOP] button #4 [SYNC START] button #5 [START/STOP] button

#6 [INTRO] button

#7 [MAIN/AUTO FILL A] button #8 [MAIN/AUTO FILL B] button #9 [ENDING/rit.] button $0 [REGISTRATION MEMORY] buttons $1 [ONE TOUCH SETTING] buttons $2 [MULTI PAD] buttons $3 Disk Drive $4 [PITCH BEND] wheel

● Rear Panel

$5 [PHONES/OUTPUT] jack $6 [FOOT SWITCH] jack $7 [TO HOST] connector

$7 $8 $9 $6 $5 %0

$8 [HOST SELECT] switch $9 [MIDI IN], [MIDI OUT] connectors %0 [DC IN 10–12V] jack

PSR-550

■ CIRCUIT BOARD LAYOUT & WIRING

● Lower case side

Speaker

(Woofer-R)

● Upper case side

W-PNS

W-PNL

390

380

L40

W-MID

W-ANAW-DMV

L50

Speaker

(Woofer-L)

Speaker

(Tweeter-L)

W-STB

Speaker

(Tweeter-R)

Caution : Be sure to attach the removed filament tape just as it was before removal.

W-PND

350

MKS5MK-H MK-L

W-PITW-MVR

● Upper case side

Speaker

(Tweeter-R)

390 370 360 W-LCD

FDD

PN 4/5

PSR-550

Speaker

W-STB390380W-PNL

PN 5/5

(Tweeter-L)

W-PNS

W-PND

W-EP2 W-ENC W-EP2 W-MVR

390

PN 2/5

Back Light Assembly & LCD

PN 1/5

W-PIT

PN 3/5

● Side view

RED BLUE WHITE

Back Light Assembly

Location Part No. Connector Assembly Destination Remarks

350 – MKB MKS5-CN1 *2 *1 DM-CN180 *2 *1 6P (V381860) 360 – LCV DM-CN960 *1 PN 1/5-CN102 *1 2P (V381920) 370 V4468500 FDV DM-CN950 *1 FDD-CN2 *1 3P 380 V3819400 FDD DM-CN850 *1 FDD-CN1 *1 34P 390 – BLT DM-CN999 *1 Back Light 6P (V705780) L40 – SPW AM-CN480 *1 Speaker (Wo) 4P (V381950) L50 – BAT AM-CN510 *1 Battery 2P (V705790) W-ANA – ANA AM-CN100 DM-CN250 *1 4P (V381820) W-DMV – DMV AM-CN530 DM-CN920 *1 5P (V381840) W-EP2 – EP2 AM-J411,J412 Speaker (Tw-L) L=160 (V457700) W-EP2 – EP2 AM-J421,J422 Speaker (Tw-R) L=160 (V457700) W-MID – MID AM-CN800 DM-CN170 *1 7P (V381870) W-ENC – ENC PN 2/5-CN602 PN 1/5-CN502 *1 3P (V381800) W-LCD – LCD PN 1/5-CN101 DM-CN750 *1 12P (V445890) W-MVR – MVR PN 4/5-CN801 AM-CN390 *1 5P (V381830) W-PIT – PIT PN 3/5-CN603 PN 1/5-CN503 *1 3P (V381810) W-PND – PND PN 1/5-CN301 DM-CN650 *1 8P (V381880) W-PNL – PNL PN 1/5-CN501 DM-CN550 *1 10P (V381890) W-PNS – PNS PN 1/5-CN401 DM-CN150 *1 11P (V381900) W-STB – STB PN 5/5-CN701 AM-CN520 *1 6P (V381850)

*The parts with “–” in “Part No.” are not available as spare parts. *1 : Edge mark is adjusted to Pin 1 mark (

mark).

* 2 : Be sure to make a correct match when connecting MKS5 (CN1)

and DM (CN180). Connecting the connectors in the wrong way around may cause damage to the MKS5 circuit board.

X100 7MHz

CL1 5MHz

X200

33.8688MHz

X800 16MHz

28CA1-8819395

64M

IC230 44P

2,5,6,9,12, 15,16,19

HC74

CN150

9 – 15

CN603

CN602

CN503

CN502

PITCH BEND

DATA DAIL

RE602

VR603

SI[0 – 10]

YAMAHA PSR-550

CN999

BACK LIGHT Switch 2bit

IC700 16P

TO HOST

HOST SELECT

MIDI

OUT

LF501

VR800

IC370 20P

SW700

CN530

CN920

158

DC IN

(10-12V)

PHONES/OUTPUT

CN480

5/5

4/5

1/5

3/5

2/5

FOOT SWITCH

4-20,22 29-30, 52-54, 56-60, 62-64, 61-70

RESET

IC190

/IC

+5D

1-10, 14-21, 23-30, 32-42

1-3

8,9

2,12

1 2 3

2 5 6

9,12,15 16,19

3,4,7,8,13, 14,17,18

2-15,17-21, 18-21,24-28, 35-38

2-5,7-10, 18-21, 24-28, 35-38

32-35,47,48,50, 51,53,60,61

39-46

/IC

2-5,7-10, 18-21,24-27, 35-38,40-43

2-11,15-22, 24-31,34-44

CN510

MKS5

CN1

+5R

IC1 44P

CPU

MK-L

MK-H

CN3

CN2

CN4

IC100 112P

IC260 44P

IC200 168P

IC270 28P

IC310 42P

IC350 16P

IC800 64P

IC999 14P

IC700 20P

TR998 TR999

IC100 80P

IC200 60P

IC300 44P

IC330 32P

IC500 20P

IC600 16P

PSR-550

■ BLOCK DIAGRAM

■ DISASSEMBLY PROCEDURE

PSR-550

1. Lower Case Assembly

(Time required : About 5 min.)

[430A]

[440A] [440A]

[430A] :Bind Head Tapping Screw-P 3.0X12 MFZN2Y (EP600300) [440A] :Bind Head Tapping Screw-P 3.0X25 MFZN2Y (VK228100)

Battery Cover Assembly

1-1. Remove the fourteen (14) screws marked [430A]

and the four (4) screws marked [440A]. The lo wer case assembly can then be removed. (Fig. 1)

[430A] [430A]

[430A]

Lower Case Assembly

(Fig.1)

[430A][430A]

2. Spring Terminal

(Time required : About 10 min.)

2-1. Remove the lower case assembly. 2-2. Remove the BAT connector assembly (red/black)

soldered to the spring terminal (+)/(-). (Fig. 2) 2-3. Remove the battery cover assembly. (Fig. 1) 2-4. Remove the spring terminal by releasing hooks

(2 locations for each). (Fig. 3)

BAT Connector Assembly (Black)

Hook

Lower Case Assembly

(Fig.2)

(See procedure 1)

BAT Connector Assembly (Red)

Hook

Spring Terminal

3. DM Circuit Board, Shield Box U and L

(Time required : About 10 min.)

3-1. Remove the lower case assembly.

(See procedure 1)

3-2. Remove the two (2) screws marked [430B] and the

fourteen (14) screws marked [450]. The shield box U and the DM circuit board can then be removed. (Fig. 4)

3-3. Remove the three (3) screws marked [420A]. The

shield box L can then be removed. (Fig. 4)

4. Floppy Disk Drive Assembly

(Time required : About 10 min.)

4-1. Remove the lower case assembly.

(See procedure 1)

4-2. Remove the DM circuit board and the shield box

U and L. (See procedure 3)

4-3. Remove the four (4) screws marked [460]. The

floppy disk assembly can then be removed.

(Fig. 5)

5. AM Circuit Board

(Time required : About 15 min.)

5-1. Remove the lower case assembly. 5-2. Remove the DM circuit board and the shield box

U and L. (See procedure 3)

5-3. Remove the eleven (11) screws marked [420B].

The AM circuit board can then be remo ved.

(See procedure 1)

(Fig. 5)

(Fig.3)

PSR-550

Speaker (Woofer)

[420H]

[450]

Shield Box L

[420A]

[L30]

[450]

[420A]

[450]

[L30]

Speaker (Woofer)

[420H]X2

Speaker (Tweeter)

[440B]

[430B] [450] [430B] [30] [30] [440B]

Shield Box U

[30] : Bind Head Tapping Screw-P 3.0X8 MFZN2Y (EP600280) [420] : Bind Head Tapping Screw-P 3.0X8 MFZN2Y (EP600280) [430B] : Bind Head Tapping Screw-P 3.0X12 MFZN2Y (EP600300) [440B] : Bind Head Tapping Screw-P 3.0X25 MFZN2Y (VK228100) [450] : Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) [L30] : Bind Head Tapping Screw-P 4.0X8 MFZN2BL (VB931600)

Keyboard Assembly

MKS5

(Fig.4)

[420B] [460] [420B] [420B]

FDD

Speaker (Tweeter)

[460]

[420B] : Bind Head Tapping Screw-P 3.0X8 MFZN2Y (EP600280) [460] : Sems Pan Head Screw 3.0X10 MFZN2Y (V5115200)

[420B]

(Fig.5)

PSR-550

6. PN 4/5 Circuit Board

(Time required : About 15 min.)

6-1. Remove the lower case assembly.

(See procedure 1)

6-2. Remove the DM circuit board and the shild box U

and L. (See procedure 3)

[420D] [420D]

[420D]

[420E] [420D]

[420] : Bind Head Tapping Screw-P 3.0X8 MFZN2Y (EP600280)

PN 2/5

7. PN 1/5 Circuit Board

(Time required : About 20 min.)

7-1. Remove the lower case assembly. 7-2. Remove the DM circuit board and the shield box

U and L. (See procedure 3) 7-3. Remove the floppy disk drive assembly. (See

procedure 4) 7-4. Remove the AM circuit board. (See procedure 5) 7-5.

Remove the PN 4/5 circuit board. (See procedure 6) 7-6. Remove the twenty-five (25) screws marked

[420D]. The PN 1/5 circuit board can then be

removed. (Fig. 6)

(See procedure 1)

6-3. Remove the AM circuit board. (See procedure 5) 6-4. Remove the volume knob from the control panel

side. (Fig. 7)

6-5. Remove the three (3) screws marked [420C]. The

PN 4/5 circuit board can then be removed. (Fig. 6)

[420G]

PN 1/5 PN 5/5

[420D]

(Fig.6)

PN 4/5

[420C] [420D]

Wheel Assembly

PN 5/5

9. PN 3/5 Circuit Board

(Time required : About 5 min.)

9-1. Remove the lower case assembly . 9-2. Remove the two (2) screws marked [420F]. The

PN 3/5 circuit board can then be removed with the wheel assembly. (Fig. 6)

10. PN 5/5 Circuit Board

(Time required : About 5 min.)

10-1. 10-2. Remove the two (2) screws marked [420G]. The

Remove the lower case assembly. (See procedure 1)

PN 5/5 circuit board can then be removed. (Fig. 6)

PN 3/5

[420F]

(See procedure 1)

8. PN 2/5 Circuit Board

(Time required : About 15 min.)

8-1. Remove the lower case assembly. 8-2. Remove the DM circuit board and the shield box

U and L. (See procedure 3) 8-3. Remove the AM circuit board. (See procedure 5) 8-4. Remove the encoder knob from the control panel

side. (Fig. 8) 8-5. Remove the three (3) screws marked [420E]. The

PN 2/5 circuit board can then be removed. (Fig. 6)

(See procedure 1)

Volume Knob

(Fig.7)

Encoder Knob

(Fig.8)

PSR-550

11. Keyboard Assembly

(Time required : About 10 min.)

11-1. Remove the lower case assembly.

(See procedure 1)

11-2. Remove the two (2) screws marked [440B]. The

keyboard assembly can then be removed. (Fig. 4)

12. Speakers (Time required : About 10 min.)

12-1. Remove the lo wer case assemb ly. 12-2. Remove the right and left (woofer) speakers by

removing four (4) screws marked [L30] from each speaker. (Fig. 4)

12-3. Remove the right and left (tweeter) speakers by

removing two (2) screws marked [420H] from each speaker. (Fig. 4)

(See procedure 1)

13. LCD and Back Light Assembly

(Time required : About 20 min.)

13-1. Remove the lo wer case assemb ly. 13-2. Remove the DM circuit board and the shield box

U and L. (See procedure 3)

13-3. Remove the floppy disk drive assembly.

(See procedure 4) 13-4. Remove the AM circuit board. (See procedure 5) 13-5. Remove the PN 1/5 circuit board. 13-6. The LCD can then be removed with the back light

assembly. (Fig. 9)

Back Light Assembly

LCD Rubber Connector

(See procedure 1)

(See procedure 6)

[140]

Black Key

White Key DFA

White Key CEGB

[140] : Bind Head Tapping Screw-P 3.0X16 MFZN2Y (EP600310)

Black Key

(Fig.11)

[140]

White Key C’

15. Assembling the Keyboard Assembly

15-1 Install the white keys CEGB from the lower notes,

and then install the DFA keys and C' key. Afterwards install the black keys from the higher notes, and tighten the twenty-one (21) screws marked [140]. (Fig. 11)

15-2 Install the rubber contacts in the assembly while

pressing the keys as shown in Figure 12. Check that the rubber contact has been firmly placed into position in the area indicated by the arrow in Figure 13. When fitting the rubber contacts, raise both ends of the frame so that keys do not push the rubber contact up.

15-3 Install the MK-L and MK-H circuit boards in the

assembly so that the hooks B hold it as shown in Figure 14.

Rubber Contact

(Fig.9)

14. Disassembling the Keyboard Assemb ly

14-1 Remove the keyboard assembly . 14-2 Remove the two (2) screws marked [30]. The

MKS5 circuit board can then be removed. (Fig. 4) 14-3 Remove the MK-L and MK-H circuit boards while

pressing the fifteen (15) hooks A inward, and then

remove the rubber contact. (Fig. 10) 14-4 Remove the twenty-one (21) screws marked [140],

then remove the black keys from the lower notes.

Afterwards, remove the white keys DFA and C'

and then remove the white keys CEGB from the

higher notes. At this time, lift the keys from the

front and slide them towards you. the keys can then

be removed from the assembly. (Fig. 11)

MK-L , MK-H

Hooks A

Black Key

Rubber Contact

(Fig.10)

(See procedure 11.)

White Key

MK-L , MK-H

(Fig.12)

Rubber Contact

(Fig.13)

Hooks B

(Fig.14)

■ LSI PIN DESCRIPTION

PIN NO.

I/O FUNCTIONNAME

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

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/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

µPD789022GB-A15-8E (XZ560100) CPU........................................................................................... 13

HD6437042AF90F (XZ787100) CPU .................................................................................................. 14

HG73C205AFD (XU947C00) SWX00B (Tone Generator)................................................................... 15

HD63266F (XI939A00) FDC (Floppy Disk Controller) ......................................................................... 16

S6A0065B01-Q0RJ (XV993A00) LCD DRIVER ................................................................................. 16

S6A0069X10-Q0RJ (XV226A00) LCD DRIVER.................................................................................. 17

PCM1716E (XU829A00) DAC (Digital to Analog Converter) ............................................................... 13

PSR-550

● µPD789022GB-A15-8E (XZ560100) CPU

● PCM1716E (XU829A00) DAC (Digital to Analog Converter)

NAME

NO.

LRCK

DATA

BCK

CLKO 5 6

XTO

DGND

VDD

Vcc2R

AGND2R

EXTR

12 13

VOUTR

AGND1

XTI

I/O

FUNCTION

I I I

Data input Bit clock Clock input Clock input Clock out Digital ground Digital power supply (+5 V) Analog power supply (+5 V) Analog ground

Rch, analog output Rch, analog voltage output

Analog ground

PIN NO.

15 16 17 18 19 20 21 22 23 24

25 26 27 28

MKS5 : IC1

DM : IC270

I/O

O O

FUNCTION

I I

I I I I

Analog power supply (+5 V) Lch, analog voltage output

Lch, analog output Analog ground Analog power supply (+5 V) Zero data flag Reset Chip select Mode control select (H: Software, L: Hardware) Mute control Mode control data/ De-emphasis select1 Mode control BCK/De-emphasis select2 Mode control Latch/input format select

NAME

Vcc1

VOUTL

EXTL

AGND2L

Vcc2L /ZERO

/RST

/CS/IWO

MODE

/MUTE MD/DM0 MC/DM1

ML/IIS

PSR-550

● HD6437042AF90F (XZ787100) CPU

PIN NO.

TIOC4/DACK0/PE14

PE15

VSS 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21

VCC

22 23

VSS

/RAS/PB2

/CASL/PB3

/CASH/PB4

26 27

VSS

/RDWR / PB5

A18//BACK/PB6

A19//BREQ/PB7

A20/PB8

A21/PB9

VSS

/WDTOVF

/WRH/PA13

VCC

/WRL

VSS

/CS1

/CS0

/IRQ3/TCLKD/PA9

TCLKC//IRQ2 /PA8

/CS3

/CS2

/IRQ1/PA5/SCK1

46 47

TXD1/PA4

RXD1

/IRQ0/PA2

TXD0

RXD0

D15

D14

D13

VSS

D12

A0 A1 A2 A3 A4 A5 A6 A7 A8

A9 A10 A11 A12 A13 A14 A15 A16

A17

/RD

I/O FUNCTIONNAME

I/O

O O

O O O O O O O O O O O O O O O O

I/O I/O I/O

O O

O O O

O O

O I/O I/O

O I/O

I/O I/O

I/O

MTU I/O / DMA acknowledge / Port E Port E

I I

Ground

Address bus

Power supply Address bus Ground Row address strobe / Port B Column address strobe (low) / Port B Column address strobe (high) / Port B Ground DRAM read / write / Port B Address bus / Bus acknowledge / Port B Address bus / Bus request / Port B

Address bus/ Port B Ground

Read Watch dog timer overflow High write / Port A Power supply Low write Ground Chip select Chip select Interrupt request / Timer clock/ Port A Timer clock / Interrupt request / Port A Chip select Chip select Interrupt request / Port A / Serial clock Data transmission / Port A Data reception Interrupt request / Port A Data transmission Data reception

Data bus Ground

Data bus

PIN NO.

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

PLLVCC

PLLCAP

PLLVSS

PA15 / CK

PE0/DREQ0

PE1/DRAK0

86 87 88 89 90

PF0 / AN0

PF1 / AN1

PF2 / AN2

PF3 / AN3

PF4 / AN4

PF5 / AN5

96 97

PF6 / AN6

PF7 / AN7

99 100 101 102 103 104 105 106 107 108 109 110 111

/MRES/PE13

112

D11 D10

D9 D8

VSS

D7 D6 D5

VCC

D4 D3 D2 D1 D0

VSS

XTAL

MD3

EXTAL

MD2

NMI VCC MD1 MD0

/RES

PE2

PE3

PE4

VSS

AVSS

AVCC

VSS

PE5 VCC

PE6

PE7

PE8

PE9

PE10

VSS

PE11 PE12

I/O FUNCTIONNAME

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

DM : IC100

Data bus

Ground Data bus

Power supply

Data bus

Ground

Crystal oscillator

Mode control

Crystal oscillator

Mode control

Non-maskable interrupt request

Power supply

Mode control

PLL Power supply

PLL capacitor

O O O O

O O

PLL Ground Port A / Clock

Power on reset Port E / DMA request Port E / DMA acknowledge

Port E

Ground I I

Port F / Analog input

I I I I

Analog ground

I I

Port F / Analog input

Power supply

Ground

Port E

Power supply

Port E

Ground

Port E

Manual reset / Port E

PSR-550

1 ICN I Initial clear 85 CMA3 O Program address bus 2 RFCLKI I PLL Clock 86 CMA8 O Program address bus 3 TM2 I PLL Control 87 CMA2 O Program address bus 4 AVDD_PLL Power supply 88 CRD O read signal 5 AVSS_PLL Ground 89 CMA1 O Program address bus 6 MODE0 I SWX dual mode 90 CUB O high byte effective signal 7 VCC7 Power supply 91 VCC91 Power supply 8 GND8 Ground 92 GHND92 Ground

9 XIN I crystal oscillator 93 CS1 O CS signal 10 XOUT O crystal oscillator 94 CMA0 O Program address bus 11 MODE1 I SWX separate mode 95 CLB O low byte effective signal 12 TEST0 I TEST pin 96 CMA12 O Program address bus 13 TESTON I TEST pin 97 CMA11 O Program address bus 14 AN0-P40 I A/D converter 98 CMA10 O Program address bus 15 AN1-P41 I A/D converter 99 CMA9 O Program address bus 16 AN2-P42 I A/D converter 100 GND100 Ground 17 AN3-P43 I A/D converter 101 CWE O write signal 18 AVDD_AN Power supply 102 CMA16 O Program address bus 19 AVSS_AN Ground 103 CMA15 O Program address bus 20 TXD0 O for MIDI or TO-HOST 104 CMA14 O Program address bus 21 TXD1 O for MIDI 105 CMA13 O Program address bus 22 EXCLK I Crystal oscillator 106 CMD8 I/O Program memory Data bus 23 SMD11 I/O Wave memory data bus 107 CMD7 I/O Program memory Data bus 24 SMD4 I/O Wave memory data bus 108 CMD9 I/O Program memory Data bus 25 SMD3 I/O Wave memory data bus 109 CMD6 I/O Program memory Data bus 26 SMD12 I/O Wave memory data bus 110 CMD10 I/O Program memory Data bus 27 SMD10 I/O Wave memory data bus 111 CMD5 I/O Program memory Data bus 28 SMD5 I/O Wave memory data bus 112 CMD11 I/O Program memory Data bus 29 SMD2 I/O Wave memory data bus 113 CMD4 I/O Program memory Data bus 30 SMD13 I/O Wave memory data bus 114 CMD12 I/O Program memory Data bus 31 SMD9 I/O Wave memory data bus 115 CMD3 I/O Program memory Data bus 32 SMD6 I/O Wave memory data bus 116 CMD13 I/O Program memory Data bus 33 SMD1 I/O Wave memory data bus 117 CMD2 I/O Program memory Data bus 34 SMD14 I/O Wave memory data bus 118 CMD14 I/O Program memory Data bus 35 VCC35 Power supply 119 VCC119 Power supply 36 GND36 Ground 120 GND115 Ground 37 SMD8 I/O Wave memory data bus 121 CMD1 I/O Program memory Data bus 38 SMD7 I/O Wave memory data bus 122 CMD15 I/O Program memory Data bus 39 SMD0 I/O Wave memory data bus 123 CMD0 I/O Program memory Data bus 40 SMD15 I/O Wave memory data bus 124 CMA21 O Program address bus 41 SOE O read signal 125 PDT15 I/O SWX access data bus 42 SWE O write signal 126 PDT14 I/O SWX access data bus 43 SRAS O RAS signal 127 PDT13 I/O SWX access data bus 44 SCAS O CAS signal 128 PDT12 I/O SWX access data bus 45 REFRESH O REFRESH signal 129 PDT11 I/O SWX access data bus 46 CS0 O CS signal 130 PDT10 I/O SWX access data bus 47 SMA0 O Memory address bus 131 PDT9 I/O SWX access data bus 48 SMA16 O Memory address bus 132 PDT8 I/O SWX access data bus 49 VCC49 Power supply 133 VCC133 Power supply 50 GND50 Ground 134 GND134 Ground 51 SMA1 O Memory address bus 135 PDT7 I/O SWX access data bus 52 SMA15 O Memory address bus 136 PDT6 I/O SWX access data bus 53 SMA2 O Memory address bus 137 PDT5 I/O SWX access data bus 54 SMA14 O Memory address bus 138 PDT4 I/O SWX access data bus 55 SMA3 O Memory address bus 139 PDT3 I/O SWX access data bus 56 SMA13 O Memory address bus 140 PDT2 I/O SWX access data bus 57 SMA4 O Memory address bus 141 PDT1 I/O SWX access data bus 58 SMA12 O Memory address bus 142 PDT0 I/O SWX access data bus 59 SMA5 O Memory address bus 143 VCA143 Power supply 60 GND60 Ground 144 GND144 Ground 61 VCC61 Power supply 145 PAD2 I SWX access address bus 62 SMA11 O Memory address bus 146 PAD1 I SWX access address bus 63 SMA6 O Memory address bus 147 PAD0 I SWX access address bus 64 SMA10 O Memory address bus 148 VCC148 Power supply 65 SMA7 O Memory address bus 149 GND149 Ground 66 SMA9 O Memory address bus 150 PCS I Chip select 67 SMA17 O Memory address bus 151 PWR I write enable 68 SMA8 O Memory address bus 152 PRD I read enable 69 SMA18 O Memory address bus 153 RXD0 I for Midi or TO-HOST 70 SMA19 O Memory address bus 154 RXD1 I for Midi or Key scan 71 SMA20 O Memory address bus 155 SCLKI I EXT Clock 72 SMA21 O Memory address bus 156 ADIN I A/D converter 73 SMA22 O Memory address bus 157 ADLR O A/D converter LR clock 74 SMA23 O Memory address bus 158 DO0 O DAC 75 CMA20 O Program address bus 159 DO1 O DAC 76 CMA19 O Program address bus 160 SYSCLK O 1/2 clock 77 VCC77 Power supply 161 VCC161 Power supply 78 GND78 O Ground 162 GND162 Ground 79 CMA18 O Program address bus 163 WCLK O for DAC LR clock 80 CMA17 O Program address bus 164 QCLK O 1/12 clock 81 CMA5 O Program address bus 165 BCLK O IIS-DAC clock 82 CMA6 O Program address bus 166 SYI I Synch signal 83 CMA4 O Program address bus 167 IRQ0 I Interrupt request 84 CMA7 O Program address bus 168 NMI I Interrupt request

PIN NO.

NAME I/O FUNCTION

PIN NO.

NAME I/O FUNCTION

● HG73C205AFD (XU947C00) SWX00B (Tone Generator)

DM : IC200

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