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Yamaha PORTATONE PSR-270 Service Manual
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Yamaha PORTATONE PSR-270 Service Manual

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SERVICE MANUAL
■ ■ ■ ■ ■ CONTENTS
SPECIFICATIONS ...................................................................................... 3
PANEL LAYOUT ....................................................................................... 4
CIRCUIT BOARD LAYOUT ....................................................................... 5
BLOCK DIAGRAM .................................................................................... 6
DISASSEMBLY PROCEDURE ................................................................. 7
LSI PIN DESCRIPTION .......................................................................... 12
IC BLOCK DIAGRAM ............................................................................. 14
CIRCUIT BOARDS .................................................................................. 15
TEST PROGRAM & INITIALIZE ............................................................... 17
PANEL VOICE LIST ................................................................................. 19
GM VOICE LIST....................................................................................... 20
STYLE LIST ............................................................................................. 21
MIDI IMPLEMENTATION CHART ............................................................ 22
PARTS LIST
PANEL SWITCH TABLE
OVERALL CIRCUIT DIAGRAM
PK
001617
HAMAMATSU,JAPAN
1.95K-504 I Printed in Japan'99.03

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Summary of Contents for Yamaha PORTATONE PSR-270

  • Page 1 SERVICE MANUAL ■ ■ ■ ■ ■ CONTENTS SPECIFICATIONS ..................3 PANEL LAYOUT ..................4 CIRCUIT BOARD LAYOUT ............... 5 BLOCK DIAGRAM ..................6 DISASSEMBLY PROCEDURE ..............7 LSI PIN DESCRIPTION ................12 IC BLOCK DIAGRAM ................14 CIRCUIT BOARDS .................. 15 TEST PROGRAM &...

  • Page 2: Important Notice

    PSR-270 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.
  • Page 3 : L-2L, L-2C Tempo Transpose * Specifications and descriptions are for information purposes Tuning only. Yamaha Corp. reserves the right to change or modify Accompaniment Volume products or specifications at any time without prior notice. Song Volume Metronome Volume Effects...

  • Page 4: Control Panel

    PSR-270 Control Panel MASTER VOLUME dial (13) INTRO/ENDING button OVERALL buttons (s, t, +, -) (14) MAIN A/B (AUTO FILL) buttons FUNCTION button (15) CHORD GUIDE button SONG button (16) RECORD button STYLE button (17) ONE TOUCH SETTING / SONG MEMORY but- (6) VOICE button tons Numeric keypad, +/- buttons...
  • Page 5 PSR-270 PART LIST PART LIST DESTINATION CONNECTOR DESTINATION CONNECTOR REF. NO. REMARKS REF. NO. REMARKS Ref NO. Ref NO. ASSEMBLY ASSEMBLY ① AM/PN-CN902 PVS-CN904 5P/L180 AM/PN-W0902 ⑩ AM/PN-CN907 INV-CN906 2P/420 AM/PN-W0904 ② AM/PN-CN801 PVS-CN804 AM-VR 4P/L440 AM/PN-W0801 ⑪ INV-CN905 EL LIGHT 2P/250 ③...
  • Page 6 PSR-270 28CA1-8813220...
  • Page 7 PSR-270 Lower Case Assembly Remove the battery cover assembly. (Fig. 1) Remove the fourteen (14) screws marked [330] and the two (2) screws marked [340]. The lower case assembly can then be removed. [330]: Bind Head Tapping Screw-P 3.0X12 MFZN2Y (EP600300) [340]: Bind Head Tapping Screw-P 3.0X25 MFZN2Y (VK228100) (Fig.1) DM Circuit Board...
  • Page 8 PSR-270 [310]: Bind Head Tapping Screw-P 3.0X8 MFZN2Y (EP600250) [330]: Bind Head Tapping Screw-P 3.0X12 MFZN2Y (EP600300) [340]: Bind Head Tapping Screw-P 3.0X25 MFZN2Y (VK228100) (Fig. 2) PSV 3/3 Circuit Board Remove the MASTER VOLUME knob on the con- trol panel. (See Fig. 3.) Remove the lower case assembly.
  • Page 9 PSR-270 [320]: Bind Head Tapping Screw-P 3.0X8 MFZN2Y (EP600280) [330]: Bind Head Tapping Screw-P 4.0X8 MFZN2BL (VB931600) (Fig.4) 10-1 Remove the lower case assembly. (See Procedure 1.) 10-5 Remove the AMPN 1/2 circuit board. (See Proce- 10-2 Remove the INV circuit board. (See Procedure 3.) dure 8.) 10-3 Remove the PSV 2/3 circuit board.
  • Page 10 PSR-270 Speakers 11-1 Remove the lower case assembly. (See Procedure 1.) 11-2 Remove the eight (8) screws marked [350]. The right and left speakers can then be removed. (Fig. 6) [350]: Bind Head Tapping Screw-P 4.0X8 MFZN2BL (VB931600) (Fig. 6) Disassembling the keyboard assembly 12-1 Remove the keyboard assembly.
  • Page 11 PSR-270 Assembling the keyboard assembly 13-1 Install the white keys CEGB from the lower notes, 13-2 Install the rubber contacts in the assembly while and then install the DFA keys and the C' key. Af- pressing the keys as shown in Figure 10. Check terwards install the black keys from the higher that the rubber contact has been firmly placed into notes, and tighten the twenty-one (21) screws...
  • Page 12 PSR-270 KS0076BQ-00 (XR793A00) LCD DRIVER KS0066U-10B (XV226A00) LCD DRIVER NAME FUNCTION NAME FUNCTION Data interface Segment signal output for LCD driving Common signal output for LCD driving Ground OSC1 Oscillator OSC2 Oscillator Power supply CLK1 Data latch clock Segment signal output for LCD CLK2 Data shift clock driving...
  • Page 13 PSR-270 HG73C201FD (XT890A00) SW X00 TONE GENERATOR ● NAM E FUNCTION NAME FUNCTION Initia l clear CMA3 Program a ddress bus RFC LKI PLL Clock CMA8 Program a ddress bus PLL Control CMA2 Program a ddress bus AVD D_PLL Power supply CR D re ad signa l AVSS_PL L...
  • Page 14 PSR-270...
  • Page 15 PSR-270 • DM Circuit Board to MKS3-CN1 Component side Patternside • MKS3 Circuit Board to MK-L to MK-L to MK-H DM:2NA-V338490 to DM-CN102 Note: See parts list for details of circuit board component parts.
  • Page 16 PSR-270 • AM/PN 2/2 Circuit Board to AM/PN 1/2 -CN701 • AM/PN 1/2 Circuit Board FOOT SWITCH MIDI DC-IN 10-12V PHONES/AUX OUT to SPEAKERS(R) to PSV 3/3-CN804 to DM-CN101 to AMPN 2/2- CN702 • PSV 1/3 Circuit Board • PSV 3/3 Circuit Board •...
  • Page 17 PSR-270 1. TEST PROGRAM A.PREPARATION 1) PA-3B (AC adaptor) is used when there is no specification. (PA-32,PA-3 are utilizable) 2) The volume is usually moved to the use position when no volume change is required. 3) Measuing instruments: Frequency counter Level meter (with a JIS-C filter) Note: Use a stereo plug and connect the 33Ω...

  • Page 18: Data Initialization

    PSR-270 020:SW Chk Check switches on the panel. Press the switches which are displayed on the LCD. A pre-assigned note is output when depressing the switch. The test result appears on the LCD. 028:LCD On Check that all LCD dots are on. 029:LCD Off Check that all LCD dots are off.
  • Page 19 PSR-270 MIDI MIDI Bank Select Bank Select Voice Voice Program Voice Name Program Voice Name Number Number Change# Change# PIANO Choir Aahs Grand Piano Choir Oohs Bright Piano Synth Choir Honky-tonk Piano Orchestra Hit STRINGS Funky Electric Piano DX Electric Piano Violin MIDI Grand Piano Cello...
  • Page 20 PSR-270 MIDI MIDI Bank Select Bank Select Voice Voice Program Voice Name Program Voice Name Number Number Change# Change# PIANO Orchestra Hit BRASS Acoustic Grand Piano Bright Acoustic Piano Trumpet Electric Grand Piano Trombone Honky-tonk Piano Tuba Electric Piano 1 Muted Trumpet Electric Piano 2 French Horn...
  • Page 21 PSR-270 Bank Select MIDI Bank Select MIDI Voice Voice Program Voice Name Program Voice Name Number Number Change# Change# SOUND EFFECTS Fiddle Shanai Guitar Fret Noise PERCUSSIVE Breath Noise Tinkle Bell Seashore Agogo Bird Tweet Steel Drums Telephone Ring Woodblock Helicopter Taiko Drum Applause...

  • Page 22: Midi Implementation Chart

    PSR-270 [Portable Keyboard] Date: 7-Dec-1998 MIDI Implementation Chart Model: PSR-270 Version: 1.0 Function Transmitted Recognized Remarks Basic Default 1 - 16 1 - 16 Channel Changed 1 - 16 1 - 16 Default Mode Messages Altered ************** Note 0 - 127 0 - 127 Number : True voice...

  • Page 23: Parts List

    PSR-270 PARTS LIST ■ ■ ■ ■ ■ CONTENTS OVERALL ASSEMBLY ......... 2 KEYBOARD ASSEMBLY ........4 ELECTRICAL PARTS ..........5 Note) DESTINATION ABBREVIATIONS J : Japanese model A: Australian model U: U.S. model E: European model C: Canadian model D: German model X: General model B: British model...
  • Page 24 PSR-270...
  • Page 25 PSR-270 DESCRIPTION REMARKS DESCRIPTION REMARKS PART NO. PART NO. REF NO. QTY RANK REF NO. QTY RANK OVERALL ASSEMBLY 総 組 立 V 3 3 2 8 3 0 0 Chinese Guide Sheet Set 中 文 シ ー ト 袋 入 り PSR-270 J,U,C,W,O Overall Assembly 総...
  • Page 26 PSR-270 DESCRIPTION REMARKS PART NO. QTY RANK REF NO . KEYBOARD ASSEMBLY 鍵 盤 Ａ ｓ ｓ ｙ PSR-270 V 2 3 8 6 1 0 0 Keyboard Assembly 16M C61 MKS3 １６Ｍ鍵盤Ａｓｓｙサブ基 E P 6 0 0 2 8 0 Bind Head Tapping Screw-P 3.0X8 MFZN2Y ＋...
  • Page 27 PSR-270 DESCRIPTION REMARKS PART NO. QTY RANK REF NO. ELECTRICAL PARTS 電 気 部 品 PSR-270 V 3 3 4 7 4 0 0 Circuit Board Ａ Ｍ ／ Ｐ Ｎ シ ー ト AM/PN (XV672A0) V 3 3 8 4 9 0 0 Circuit Board Ｄ...
  • Page 28 PSR-270 DESCRIPTION REMARKS PART NO. QTY RANK REF NO. V F 9 6 8 8 0 0 Coil コ イ ル   Ｓ Ｂ   ６ ０ ｕ Ｈ -610 SBT-0260TF V B 8 3 5 0 0 0 L801 Coil FL5R200QNT コ...
  • Page 29 PSR-270 DESCRIPTION REMARKS PART NO. QTY RANK REF NO. FG613220 セ ラ コ ン （ Ｂ ） C505 Ceramic Capacitor-B 2200P 50V K FG612220 Ceramic Capacitor-B セ ラ コ ン （ Ｂ ） C506 220P 50V K セ ラ コ ン （...
  • Page 30 PSR-270 DESCRIPTION REMARKS PART NO. QTY RANK REF NO. H F 7 5 5 2 2 0 Carbon Resistor カ ー ボ ン 抵 抗 R601 220.0 1/4 J H F 7 5 5 2 2 0 Carbon Resistor カ ー...
  • Page 31 PSR-270 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK V I 8 7 8 2 0 0 ケ ー ブ ル ホ ル ダ ー CN805 Cable Holder 51048 4P TE ワ イ ヤ ー ト ラ ッ プ VK024800 CN904 Wire Trap 52147...
  • Page 32 PSR-270 (セ) : Ceramic Capacitor (半セ) : Semiconductive Cera. Cap. (マ) : Mylar Capacitor : 28CA2-8813191 AMPN : 28CA2-8813217 : 28CA2-8813190 : 28CA2-8813194 WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed.
  • Page 33 PSR-270 Note: See parts list for details of circuit board component parts.