Yamaha PortaTone PSR-260 User manual

SERVICE MANUAL
CONTENTS
SPECIFICATIONS........................................................................................3
PANEL LAYOUT............................................................................................4
CIRCUIT BOARD LAYOUT & WIRING.....................................................5
BLOCK DIAGRAM........................................................................................6
DISASSEMBLY PROCEDURE...................................................................7
CIRCUIT BOARDS.....................................................................................10
LSI PIN DISCRIPTION..............................................................................14
IC BLOCK DIAGRAM................................................................................14
TEST PROGRAM & INITIALIZE..............................................................15
MIDI IMPLEMENTATION CHART............................................................17
PARTS LIST
OVERALL CIRCUIT DIAGRAM
HAMAMATSU, JAPAN
1.43K-317 I.T Printed in Japan 2000. 05
PK 001638
PSR-260
PSR-262
This document is printed on chlorine free (ECF) paper with soy ink.

PSR-260/262
2
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 sevicing 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 prformed by an authorized Yamaha Retailer or the appointed service
repre sentative.
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 principala-
gent 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, therefor, 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 expencive components. Discharge any static electricity your
body may have accumulated by grounding yourself to the ground buss in the unit (heavy
gauge black wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you
apply power to the unit.
WARNING: 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 lacated inside the enclosure of this product, wash your hands
before handling food.
WARNNG
Components having special characteristics are marked and must be replaced with parts having specification equal to those originally
installed.

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SPECIFICATIONS
Keyboard
61 standard-size keys (C1 - C6) with touch response
Display
Large multi-function LCD display (backlit)
Setup
STANDBY/ON
MASTER VOLUME : MINI-MAX
Panel controls
Overall, SONG, VOICE, STYLE, DEMO, POTABLE
GRAND, DJ, METRONOME, Dict., L, R, TEMPO /
TAP TOUCH, numeric keypad (0 - 9, +,-)
Voices
100 panel voices (max. polyphony: 16)
Effects
Dual (Included in Voice),
Harmony / Echo (Included in Voice),
Split (Included in Voice),
Sustain (Included in Voice)
Auto Accompaniment
100 styles
Fingering: Multi Fingering
Sections: Intro, Main A, B, Ending, Fill
Overall controls
Multi Pad, Grade, Talking, Transpose, Tuning, Accom
-paniment Volume, Song Volume, Metronome Volume
Style controls
Acmp On / Off, Sync-Start, Start, Stop, Intro/Ending,
Main A, B (Auto Fill)
Song controls
Start, Stop, Pause, A-B Repeat, Fast Forward, Rewind,
Melody Voice Change
One Touch Setting
1 / style, 1 / song
Multi Pads
4 pads x 10 banks
Yamaha Education Suite
Dictionary, Lesson 1-4
Preset songs
100 songs
Amplifier
2.0W + 2.0W
MIDI
IN / OUT
Auxiliary jacks
PHONES/OUTPUT, DC IN 10-12V, MIDI IN/OUT,
SUSTAIN
Speakers
12cm x 2
Power consumption
9W (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
933 x 370 x 129 mm
(36-3/4” x 14-7/12” x 5-1/12”)
Weight
5.2kg (11 Ibs., 7 oz.)
Supplied accessories
Music Stand, Owner’s Manual, Song Book
Optional accessories
Headphones: HPE-150
AC power adaptor: PA-3B, PA-3
Footswitch: FC4, FC5
Keyboard stand: L-2L, L-2C

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PANEL LAYOUT
(12) (13) (14) (15) (16) (17) (18) (19) (20) (21)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)
(22) (23) (24) (25)
(1) Power switch (STANDBY/ON)
(2) MASTER VOLUME dial
(3) TOUCH button
(4) DICTIONARY button
(5) LESSON [L] and [R] buttons
(6) OVERALL button
(7) DEMO button
(8) Piano button
(9) METRONOME button
(10) DJ button
(22) PHONES / OUTPUT jack
(23) DC IN 10-12V jack
(11) Numeric keypad, +/- buttons
(12) ACCONPANIMENT ON / OFF button
(13) SYNC START button
(14) START / STOP button
(15) INTRO / ENDING button
(16) MAIN / AUTO FILL button
(17) TEMPO / TAP button
(18) SONG button
(18) STYLE button
(20) VOICE button
(21) MULTI PAD buttons
(24) MIDI IN, OUT terminals
(25) SUSTAIN jack
• Control Panel
• Rear Panel

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CIRCUIT BOARD LAYOUT & WIRING
REF. No. DESTINATION CONNECTOR REMARKS PARTS No.
ASSEMBLY
(1) PN-CN102 M-CN101 STN 4P-L=250 V537970
(2) BATTERY M-CN103 BATTERY 2P Black-L=650 V537990
Red L=250
(3) LCD M-CN104 LED 2P-L=220 V624050
(4) PN-CN202 M-CN201 PN 12P-L=100 V623340
(5) M-CN302 M-CN301 MIDI 7P-L=370 V537940
(6) LCD-CN402 M-CN401 LCD 9P-L=270 V546610
(7) LCD M GND L=200 V546920
(8) M-CN501 SPEAKER Lch SPL L=350 V538250
(9) M-CN502 SPEAKER Rch SPR L=400 V538270
(10) PN-CN602 M-CN601 VR 5P-L=280 V562650
(11) M-CN801 MKC-CN2 MK1 11P-L=470 V545340
(12) M-CN901 MKC-CN1 MK2 13P-L=540 V545350
(13) MK-H MK-L MK-B 12P-L=220 VV58360
(14) MKC-CN3 MK-L MK-C 7P-L=260 VV58350
(15) MKC-CN4 MK-H MK-D 5P-L=625 VV58370
(16) MKC-CN2 MK-L MK-A 12P-L=200 VV58310

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BLOCK DIAGRAM
LCD PN
MIDI
MK
M
VR
SW
Speakers
Back Light
L
R
+3.3 D +3.3 A +5.0 D
DC-IN
SW
LCD
RESET
IC701
100P
IC702
42P
GEW -12
IC103
REGULATOR
+3.3V
ROM
16Mbit
PROGRAM
STYLE
WAVE
BUFFER
IC601
BUFFER
IC601
9P 9P
61KEY (16M) Keyboard
PHONES/
AUX OUT
YST
Battery
AC Adapter
IC301
6P
DRIVER
IC401
80P
LCD
DRIVER
MKSC
14MHz
POWER-AMP
BA5417
IC501
IC101,IC102
REGULATOR
+5V
IC802
16P
DECODER
LVC138
IC801
16P
DECODER
LVC138
MIDI OUT
MIDI
IN SUSTAIN
IC703
1-4
13-15
1-4
13-15
2-7
28-30,33
81-88,90-97 55-57,59-64 66-71,73-77
A0-A19,
D0-D15
22-27,35-40
5,7 3,4
8 2
49,50
53
44-47
9-20
99,100
1
4
1,2
11,12
3,5
3
CN801
CN2
CN901
CN1
CN402 CN401
CN302 CN301
CN202
CN201 CN104
CN102 CN101
CN103
CN602
CN601 CN501 CN502
11P 11P 13P
13P
12P
CN3CN5CN4
12P
5P 5P
7P 7P
9P 9P
7P 7P
12P 12P 2P
4P 4P
2P
5P
5P 2P 2P
28CA1-8816210

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DISASSEMBLY PROCEDURE
1. Bottom Case Assembly
1-1 Remove the battery cover assembly. (Fig. 1)
Bottom Case Assembly [230]
[230] [230]
[230]
[240a]
Battery Cover
2. M Circuit Board
2-1 Remove the bottom case assembly. (See procedure 1.)
2-2 Remove the eight (8) screws marked [220a]. Then
the M circuit board can then be removed. (Fig. 2)
Keyboard Assembly
Upper Case Assembly [220a]
[240b]
[230]: Bind Head Tapping Screw-P 3.0 x 12 MFZN2Y (EP600300)
[240]: Bind Head Tapping Screw-P 3.0 x 25 MFZN2Y (VK228100)
1-2 Remove the fifteen (15) screws marked [230] and the
two (2) screws marked [240a]. The bottom case
assembly can then be removed. (Fig. 1)
3. Keyboard Assembly
3-1 Remove the bottom case assembly. (See procedure 1.)
3-2 Remove the three (3) screws marked [240b]. Then
the keyboard can then be removed. (Fig. 2)
(Fig. 1)
(Fig. 2)
[220]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[240]: Bind Head Tapping Screw-P 3.0 x 25 MFZN2Y (VK228100)

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[220b]
[220d][220c] [220e]
[220c]
4. MIDI Circuit Board
4-1 Remove the bottom case assembly. (See procedure 1.)
4-2 Remove the two (2) screws marked [220b]. Then the
MIDI circuit board can then be removed. (Fig. 3)
5. PN Circuit Board
5-1 Remove the bottom case assembly. (See procedure 1.)
5-2 Remove the M circuit board. (See procedure 2.)
5-3 Remove the eighteen (18) screws marked [220c].
Then the PN circuit board can then be removed.
(Fig. 3)
6. VR Circuit Board
6-1 Remove the MASTER VOLUME knob on the con-
trol panel. (Fig. 4)
6-2 Remove the bottom case assembly. (See procedure 1.)
6-3 Remove the M circuit board. (See procedure 2.)
6-4 Remove the three (3) screws marked [220d]. Then
the VR circuit board can then be removed. (Fig. 3)
7. PW Circuit Board
7-1 Remove the bottom case assembly. (See procedure 1.)
7-2 Remove the M circuit board. (See procedure 2.)
7-3 Remove the two (2) screws marked [220e]. Then the
PW circuit board can then be removed. (Fig. 3)
7-4 Pull off the knob from the PW circuit board.
Volume knob
(Fig. 3)
(Fig. 4)
[L50]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[220]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[250]: Bind Head Tapping Screw-P 4.0 x 8 MFZN2BL (VB931600)

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8. LCD Circuit Board / LCD Unit
8-1 Remove the bottom case assembly. (See procedure 1.)
8-2 Remove the M circuit board. (See procedure 2.)
8-3 Remove the four (4) screws marked [220f]. Then the LCD
unit can then be removed. (Fig. 5)
8-4 Remove the eight (8) screws marked [L50]. Then the LCD
circuit board can then removed. (Fig. 5)
8-5 Remove the two rubber contacts. Be careful not to touch
the conductive surface.
(Fig. 5)
(Fig. 8)
(Fig. 7)
(Fig. 6)
(Fig. 9)
(Fig. 10)
(Fig. 11)
[140]: Bind Head Tapping Screw-P 3.0 x 16 MFZN2Y (EP600130)
[140]: Bind Head Tapping Screw-P 3.0 x 16 MFZN2BL (VB205200)
[140]: Bind Head Tapping Screw-P 3.0 x 16 MFZN2B (VS756700)
[220f][250] LCD Unit
Speaker-R Speaker-L
[250]
LCD [L50]
[L50]
9. Speakers
9-1 Remove the bottom case assembly. (See procedure 1.)
9-2 Remove the eight (8) screws marked [250]. The right and
left speakers can then be removed. (Fig. 5)
*The right and left speakers can be removed in the same
manner.
10. Disassembling the Keyboard Assembly
10-1 Remove the keyboard assembly. (See procedure 3.)
10-2 Remove the two (2) screws marked [220g]. The MKC
circuit board can then be removed. (Fig. 6)
10-3 Remove the MK circuit board while pressing the fifteen
(15) hooks (A) inward, and then remove the rubber
contact. (Fig. 7)
Keyboard Assembly [220g]
10-4 Remove the twenty-one (21) screws marked [140], then
remove the black keys from the lower register. Afterward,
remove the white keys DFA and C’ and then remove the
white keys CEFB from the higher register. At this time, lift
the keys from the front and slide them towards you. The
keys can then be removed from the assembly. (Fig. 8)
11. Assembling the Keyboard Assembly
11-1 Install the white keys CEGB from the lower register, and
then DFA keys and C’ key. Afterwards install the black
keys from the higher register, and tighten the twenty-one
(21) screws marked [140]. (Fig. 8)
11-2 Install the rubber contacts in the assembly while pressing
the keys as shown in Fig. 9. Check that the rubber contact
has been firmly placed into position in the area indicated
by the arrow in Fig. 10. (Fig. 9, 10 and 11)
*When fitting the rubber contacts, raise both ends of the
frame so that keys do not push the rubber contact up.
Install the MK circuitboard in the assembly so that the
hooks (B) hold it as shown in Fig 11.
[L50]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[220]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)
[250]: Bind Head Tapping Screw-P 4.0 x 8 MFZN2BL (VB931600)
[220]: Bind Head Tapping Screw-P 3.0 x 8 MFZN2Y (EP600280)

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CIRCUIT BOARDS
• M Circuit Board
Component side
Note: See partslist for details of circuit board component parts.
DC-INPHONES / OUTPUT
to LCD Unitto BATTERY
to SW-CN102
to SPEAKER (L)to SPEAKER (R)
to VR-CN602
to MIDI-CN301
to MKC-CN1 to MKC-CN2
to PN-CN202
to LCD-CN402
M: 2NA-V536720 1