Pioneer PORTATONE PSR-280, PORTATONE PSR-282 Service Manual

SERVICE MANUAL

PK

001641

HAMAMATSU, JAPAN

1.43K-257 Printed in Japan '00.06

CONTENTS

SPECIFICATIONS···································································· 3
PANEL LAYOUT······································································· 4
CIRCUIT BOARD LAYOUT······················································ 6
BLOCK DIAGRAM···································································· 8
DISASSEMBLY PROCEDURE················································· 9
LSI PIN DESCRIPTION·························································· 12
IC BLOCK DIAGRAM ····························································· 14
CIRCUIT BOARDS································································· 15
TEST PROGRAM··································································· 24
DATA INITIALIZATION··························································· 26
MIDI IMPLEMENTATION CHART·········································· 27
PARTS LIST
OVERALL CIRCUIT DIAGRAM

This document is printed on chlorine free (ECF) paper with soy ink.

PSR-280

PSR-282

PSR-280/PSR-282

2

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where
applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly
other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON
WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes
to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling
food.

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that
basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by
the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal

injury, destruction of expensive components and failure of the product to perform as specified. For these
reasons, we advise all Yamaha product owners that all service required should be performed by an authorized
Yamaha Retailer or the appointed service representative.

IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization, certification,

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

The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and
service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and
changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist,
please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have

accumulated by grounding yourself to the ground 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

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

SPECIFICATIONS

PSR-280/PSR-282

3

Keyboards

• 61 standard-size keys (C1 - C6), with Touch Response and
Dynamic Filter.

Display

• Large multi-function LCD display (backlit)

Setup

• STANDBY/ON

• MASTER VOLUME: MIN - MAX

Panel Controls

• OVERALL (L, R), SONG, VOICE, STYLE, PORTABLE
GRAND, DJ, METRONOME, [0]-[9], [+](YES), [-](NO),
DEMO, TOUCH, HARMONY, Dict., L, R, TEMPO/TAP

Voice

• 118 panel voices + 10 Drum Kits + 128 GM Voices

• Polyphony: 32

• Voice Set

Auto Accompaniment

• 100 styles

• Accompaniment Control: ACMP ON/OFF, SYNC STOP,

SYNC START, START/STOP,
INTRO/ENDING, MAIN A/B(AUTO
FILL)

• Fingering : Multi fingering

• Accompaniment Volume

Yamaha Educational Suite

• Dictionary

• Lesson 1-4

One Touch Setting

• Voice (for each style or song)

Overall controls

• Transpose

• Tuning

• Accompaniment Volume

• Song Volume

• Metronome Volume

• MIDI

• Reverb

• DSP

• Harmony

• Grade

• Talking

Effects

• Reverb: 8 types

• DSP: 37 types

• Harmony: 26 types

Song

• 100 Songs + 5 User Songs

• Song Clear, Track Clear

Recording

• Song

User Song: 5 Songs
Real Time Recording
Recording Tracks: 1, 2, 3, 4, 5, CHORD

MIDI

• Clock

• Bulk Send/Receive

• Initial Send

Auxiliary jacks

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

Amplifier

• 3.0 W + 3.0 W

Speakers

• 12 cm x 2 + 3 cm x 2

Power Consumption

• 15 W (when using PA-3B power adaptor)

Power Supply

• Adaptor: Yamaha PA-3B AC power adaptor

• Batteries: Six “D” size, SUM-1, R-20 or equivalent batteries

Dimensions (W x D x H)

• 933 x 370 x 129 mm (36-3/4" x 14-5/8" x 5-1/6")

Weight

• 5.5 kg (12 lbs., 2 oz.)

Supplied Accessories

• Music Stand

• Owner’s Manual

• Song Book

Optional Accessories

• Headphones: HPE-150

• AC power adaptor: PA-3B

• Footswitch: FC4, FC5

• Keyboard stand: L-2L, L-2C

PSR-280/PSR-282

4

PANEL LAYOUT

1

2

3 4

5

6

7 7

10

9

8

11

12

2423

222120

19

18

1716151413

1

Power switch ([STANDBY/ON])

2

[MASTER VOLUME] dial

3

[TOUCH] button

4

[HARMONY] button

5

[Dict.] (DICTIONARY) button

6

LESSON [L] (Left) and [R] (Right) buttons

7

Overall (left, right) buttons

8

[DEMO] button

9

[Piano] button

10

[METRONOME] button

11

[DJ] button

12

Numeric keypad, [+/YES] and [-/NO] buttons

13

[ACMP ON/OFF] / [A-B REPEAT] button

14

[SYNC STOP] button

15

[SYNC START] / [ PAUSE] button

16

[START/STOP] button

17

[INTRO/ENDING] / [ REW] button

18

[MAIN/AUTO FILL] / [ FF] button

19

[TEMPO/TAP] button

20

[SONG] button

21

[STYLE] button

22

[VOICE] button

23

[SONG MEMORY] buttons

24

REGISTRATION MEMORY buttons

Front Panel

25 26 27 28

29

33

343537

30

38 39

36

3140 41 32

25

MIDI IN, OUT terminals

26

SUSTAIN jack

29

Indicators

30

Overall indicator

31

Notation

32

Keyboard

33

Measure

34

Beat marks

35

Chord

27

PHONES/OUTPUT jack

28

DC IN 10-12V jack

36

Song/Voice/Style name and number, Tempo

37

Song track indicators

38

Touch indicator

39

Harmony indicator

40

Sync Stop indicator

41

Accompaniment On indicator

PSR-280/PSR-282

5

Rear Panel

Display

DM

AM

CN102

CN501CN101

390 WH100 WH050WH060WH040

WH500 380

380WH300 WH400380

WH200

WH500WH010

L70WH020

L70WH400WH300

WH040

WH050WH030

LCD unit Upper case assembly

Speaker R (Tweeter)

Speaker R (Woofer)

Speaker L (Tweeter)

Speaker L (Woofer)

Keyboard assembly

PN(PNR) PN(PNC)

LCD

PN(PNL)

PN(PW)

MK-LMK-H

MKS3

PN(VR)

CN911

CN910

CN101

CN912

CN820

CN810

CN801

CN601

CN701

CN702

CN601

CN501

CN911

CN801

CN1

CN703

CN706

CN705

CN701

CN704

2NC-V524070

3

PSR-280/PSR-282

6

CIRCUIT BOARD LAYOUT

PSR-280/PSR-282

7

PN(PNR)-CN701 DM-CN702 14PDM-PN-R

Connector AssemblyPart No.

(V539010)

Location Destination Remarks

WH010

PN(PNR)-CN703 PN(PNL)-CN704 9PPN-R-PN-L(V539100)

WH020

PN(PNL)-CN705 PN(PNC)-CN706 4PPN-L-PN-C(V539110)

WH030

PN(VR)-CN501 DM-CN501 4PDM-VR(V539030)

WH040

PN(VR)-CN801 AM-CN801 4PAM-VR(V539060)

WH050

PN(PW)-CN911 AM-CN911 4PAM-PSW(V539040)

WH060

AM-CN101 DM-CN101 5PDM-AM1(V538990)

WH100

AM-CN601 DM-CN601 6PDM-AM2(V539000)

WH200

AM-CN810

SPEAKER R

2PAM-SP-R(V539140)

WH300

SPEAKER R

AM-CN820

SPEAKER L

2PAM-SP-L(V560490)

WH400

SPEAKER L

LCD-CN1 DM-CN701 12PDM-LCD(V538980)

WH500

LCD UNIT AM-CN912 2PAM-LCD(V539120)

L70

POWER SUPPLYAM-POWER(V539130)

380

KEYBOARD ASSEMBLY

DM-MKS(V616910)

390

DM-CN102 6P

AM-CN910 2P

* Connector assembly listed above are not available as service parts.

Keyboard SW MATRIX

8MHz

RESET

SWX00

4.2V

CPU

CL1 IC1

LCD

DRIVER

SW MATRIX

STANDBY/ON

IC701

LCD

DISPLAY

LD701

LCD

BUCKLIGHT

CN1

CN102 CN701 CN702

CN701 CN911

CN911

CN1

TXD1, LSIIC, RXD1, SCLKI

PAD0~5, PDT0~7, 11, 12

C1~C16,

S1~S40

S-BUS D0~15, A0~20

C-BUS D0~15, A0~20

IC103

1

9

153 14

3

12 1

21

SW60

32

20

156

158, 163, 164

5~7

IC101

RXD0

TXD0

ADIN

CLOCK

DAC

8.4672MHz

CL001

DO0, WCLK, QCLK

IC501

LPF

EQ

POWER

AMP

PHONES/

OUTPUT

IC502

IC800

IC810

IC820

1

3

1521

1712147

7

7

2

6

2

5

6

CN101

CN601

CN101

CN601

JK620

JK630

JK900

JK640

CN820 1

2

1

2

CN810

IC820

IC810

+

+

+

+

3W x 2

CN501

CN501

CN801CN801

MASTER

VOLUME

MIDI I/F

IC601

+3.3V REG

Tweeter L

SUSTAIN

MIDI IN

MIDI OUT

DC IN

10-12V

BATTERIES

1.5V x 6

Tweeter R

SP-L 4

SP-R 4

IC102

+5V REG

IC930

+5V REG

IC920

+5V REG

IC940

+3.3D

+5D

+5V

8M ROM

PROGRAM

IC202

1M SRAM

IC302

1M SRAM

IC301

ROM2

32M ROM

WAVE

IC201

ROM1

+5V

CN910

DM

MK

MKS3

AM

PN(PNL, PNC, PNR)

LCD

PN(PW)

PN(VR)

28CA1-8816895

PSR-280/PSR-282

8

BLOCK DIAGRAM

DM AM

MKS3

PN(PW)

Keyboard assembly [A]

[240]

Lower shield box

[260B][280][250C]

[260B] [250A] [250A]

[30]

[260B] [250A]

[250B][250A]

[270B]

[270B] [270B]

[250C]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280) [280]: Bind Head Tapping Screw-P 4.0 x 8 MFZN2BL (VB931600)

(Fig. 2)

Speaker R

(Tweeter)

Speaker R

(Woofer)

[250C]

[280] [250C]

Speaker L

(Tweeter)

Speaker L

(Woofer)

[250C]

+– +–

Battery cover assembly[260A] Lower case assembly

[260A]

[260A][260A]

[270A] [270A]

[260A]

[260A]: Bind Head Tapping Screw-P 3.0 x 12 MFZN2Y (EP600300) [270A]: Bind Head Tapping Screw-P 3.0 x 25 MFZN2Y (VK228100)

(Fig. 1)

DISASSEMBLY PROCEDURE

PSR-280/PSR-282

9

1. Lower Case Assembly

1-1 Remove the battery cover assembly. (Fig. 1)

1-2 Remove the fifteen (15) screws marked [260A] and two

(2) screws marked [270A]. The lower case assembly can
then be removed. (Fig. 1)

2. Circuit Board and Units on the Panel Asseembly

After removing the lower case assembly. (See Procedure 1.)
Remove the following screws, each circuit board and can be removed. (Fig. 2)

Circuit Board and Unit

DM

AM
PN(PW)

MKS3
Keyboard Assembly

[260B]

[240]
[250A]
[250B]

[A]

[30]

[270B]

Bind Head Tapping Screw-P 3.0 x 12 MFZN2Y (EP600300)
Bind Head Tapping Screw-B 3.0 x 8 MFZN2Y (EP600250)
Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
Push Knob (VQ218800)
Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
Bind Head Tapping Screw-P 3.0 x 25 MFZN2Y (VK228100)

5
9
7
2
1
2
3

Ref. No. Screw QTY

PN(VR)LCD

PN(PNL)

PN(PNC)

PN(PNR)

[250D][L50]

[250H] [250E]

[250E]

[250E][250F] [250F]

[250H]

[250G]

[250H]

[250G]

[250G]

[250H]

LCD unit

[250]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280) [L50]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)

(Fig. 3)

PSR-280/PSR-282

10

3. Speakers

3-1 Remove the lower case assembly. (See Procedure 1.)
3-2 Woofer:

Remove the four (4) screws marked [280]. The right and
left speakers (woofer) can then be removed. (Fig. 2)

3-3 Tweeter:

Remove the two (2) screws marked [250C]. The right and
left speakers (tweeter) can then be removed. (Fig. 2)

4. PN(VR), PN(PNL) Circuit Boards

4-1 Remove the lower case assembly. (See Procedure 1.)
4-2 Remove the AM circuit board. (See Procedure 2.)
4-3 PN(VR) Circuit Board:

Remove the three (3) screws marked [250D]. The PN(VR)
circuit board can then be removed. (Fig. 3)

4-4 PN(PNL) Circuit Board:

Remove the six (6) screws marked [250E]. The PN(PNL)
circuit board can then be removed. (Fig. 3)

5. PN(PNC), PN(PNR), LCD Circuit Boards

5-1 Remove the lower case assembly. (See Procedure 1.)
5-2 Remove the DM circuit board. (See Procedure 2.)
5-3 Remove the AM circuit board. (See Procedure 2.)
5-4 PN(PNC) Circuit Board:

Remove the three (3) screws marked [250F]. The PN(PNC)
circuit board can then be removed. (Fig. 3)

5-5 PN(PNR) Circuit Board:

Remove the eight (8) screws marked [250G]. The PN(PNR)
circuit board can then be removed. (Fig. 3)

5-6 LCD Circuit Board:

Remove the four (4) screws marked [250H]. The LCD unit
can then be removed. (Fig. 3)
Remove the eight (8) screws marked [L50]. The LCD circuit
board can then be removed. (Fig. 3)

* When re-install the LCD, place it so that the small protrusion

on the LCD faces the inside on the right. (Fig. 4)

6. Disassembling the keyboard assembly

6-1 Remove the keyboard assembly. (See Procedure 2.)
6-2 Remove the two (2) screws marked [30]. The MKS3 circuit

board can then be removed. (Fig. 2)

6-3 Remove the MK circuit board while pressing the fifteen

(15) hooks A inward, and then remove the rubber contact.
(Fig. 5)

6-4 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. 6)

Conductor side

• LCD unit

Rubber connector

Rubber connector

(Fig. 4)

(Fig. 8)

(Fig. 9)

(Fig. 7)

Rubber contact

Rubber contact

Hooks B

MK

PSR-280/PSR-282

11

7. Assembling the keyboard assembly

7-1 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. 6)

7-2 Install the rubber contacts in the assembly while pressing

the keys as shown in Figure 9. Check that the rubber
contact has been firmly placed into position in the area
indicated by the arrow Figure 10.

* When fitting the rubber contacts, raise both ends of the

frame so that do not push the rubber contact up. Install the
MK circuit board in the assembly so that the hooks B hold
it as shown in Figure 11. (Fig. 7, 8, 9)

White Keys

Rubber contact

Hooks A

Black Keys

(Fig. 5)

MK

Black Keys

White Keys DFA

White Keys CEGB

White Key C'

[140]

[140]: Bind Head Tapping Screw-P 3.0 x 16 MFZN2Y (EP600310) or

[140]: Bind Head Tapping Screw-P 3.0 x 16 MFZN2BL (VB205200) or

[140]: Bind Head Tapping Screw-P 3.0 x 16 MFZN2B (VS756700)

(Fig. 6)

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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84

ICN

RFCLKI

TM2
AVDD_PLL
AVSS_PLL

MODE0

VCC7

GND8

XIN

XOUT

MODE1

TEST0
TESTON
AN0-P40
AN1-P41
AN2-P42
AN3-P43

AVDD_AN
AVSS_AN

TXD0

TXD1
EXCLK
SMD11

SMD4

SMD3
SMD12
SMD10

SMD5

SMD2
SMD13

SMD9

SMD6

SMD1
SMD14
VCC35
GND36

SMD8

SMD7

SMD0
SMD15

SOE

SWE
SRAS
SCAS

REFRESH

CS0

SMA0

SMA16
VCC49
GND50

SMA1

SMA15

SMA2

SMA14

SMA3

SMA13

SMA4

SMA12

SMA5

GND60
VCC61
SMA11

SMA6

SMA10

SMA7
SMA9

SMA17

SMA8

SMA18
SMA19
SMA20
SMA21
SMA22
SMA23
CMA20
CMA19
VCC77
GND78
CMA18
CMA17

CMA5
CMA6
CMA4
CMA7

I
I
I

I

I

O

I
I
I
I
I
I
I

O
O

I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

I/O
I/O
I/O
I/O

O
O
O
O
O
O
O
O

O
O
O
O
O
O
O
O
O

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

O
O
O
O
O
O
O

Initial clear
PLL Clock
PLL Control
Power supply
Ground
SWX dual mode
Power supply
Ground
crystal oscillator
crystal oscillator
SWX separate mode
TEST pin
TEST pin
A/D converter
A/D converter
A/D converter
A/D converter
Power supply
Ground
for MIDI or TO-HOST
for MIDI
Crystal oscillator
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
Power supply
Ground
Wave memory data bus
Wave memory data bus
Wave memory data bus
Wave memory data bus
read signal
write signal
RAS signal
CAS signal
REFRESH signal
CS signal
Memory address bus
Memory address bus
Power supply
Ground
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Ground
Power supply
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Memory address bus
Program address bus
Program address bus
Power supply
Ground
Program address bus
Program address bus
Program address bus
Program address bus
Program address bus
Program address bus

85
86
87
88
89
90
91
92
93
94
95
96
97
98

99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168

CMA3
CMA8
CMA2

CRD

CMA1

CUB

VCC91

GHND92

CS1

CMA0

CLB
CMA12
CMA11
CMA10

CMA9

GND100

CWE
CMA16
CMA15
CMA14
CMA13

CMD8
CMD7
CMD9
CMD6

CMD10

CMD5

CMD11

CMD4

CMD12

CMD3

CMD13

CMD2

CMD14

VCC119
GND115

CMD1

CMD15

CMD0
CMA21
PDT15
PDT14
PDT13
PDT12
PDT11
PDT10

PDT9

PDT8
VCC133
GND134

PDT7

PDT6

PDT5

PDT4

PDT3

PDT2

PDT1

PDT0
VCA143
GND144

PAD2

PAD1

PAD0
VCC148
GND149

PCS

PWR

PRD
RXD0
RXD1

SCLKI

ADIN
ADLR

DO0

DO1

SYSCLK
VCC161
GND162

WCLK

QCLK
BCLK

SYI

IRQ0

NMI

O
O
O
O
O
O

O
O
O
O
O
O
O

O
O
O
O

O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

I/O
I/O
I/O

O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O

I
I
I

I
I
I
I
I
I

I
O
O
O
O

O
O
O

I

I

I

Program address bus
Program address bus
Program address bus
read signal
Program address bus
high byte effective signal
Power supply
Ground
CS signal
Program address bus
low byte effective signal
Program address bus
Program address bus
Program address bus
Program address bus
Ground
write signal
Program address bus
Program address bus
Program address bus
Program address bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program memory Data bus
Power supply
Ground
Program memory Data bus
Program memory Data bus
Program memory Data bus
Program address bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
Power supply
Ground
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
SWX access data bus
Power supply
Ground
SWX access address bus
SWX access address bus
SWX access address bus
Power supply
Ground
Chip select
write enable
read enable
for Midi or TO-HOST
for Midi or Key scan
EXT Clock
A/D converter
A/D converter LR clock
DAC
DAC
1/2 clock
Power supply
Ground
for DAC LR clock
1/12 clock
IIS-DAC clock
Synch signal
Interrupt request
Interrupt request

HG73C205AFD (XU947C00) SWX00B (Tone Generator)

DM: IC101

PSR-280/PSR-282

12

LSI PIN DESCRIPTION