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Yamaha Portatone PSR-550 Service Manual
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Yamaha Portatone PSR-550 Service Manual

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See also: Owner's Manual
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 LIST
This document is printed on chlorine free (ECF) paper with soy ink.
PK
001654
1.412K-667
Printed in Japan '01.05

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  • Page 1 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 &...

  • Page 2: Specifications

    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.

  • Page 3: Specifications

    PSR-550 SPECIFICATIONS Keyboards Digital Effects Amplifiers • 61 standard-size keys (C1 — C6) with • 6W + 6W (when using PA-6 power • Reverb : 24 types touch response. adaptor) • Chorus : 16 types • 4.5W + 4.5W (when using batteries) •...

  • Page 4: Panel Layout

    PSR-550 PANEL LAYOUT Top Panel 001 Grand CHORD BACK NEXT NAVIGA START/STOP KEYBOARD augsus4 TRANSPOSE REGIST- TEMPO RATION @3 @4 @5 @1 @2 #3 #4 #5 #6 #7 #8 #9 CLICK A’ nd Piano TRACK(1~16) 0 ~ 9 EASY VIGATOR...
  • Page 5 PSR-550 q Power switch ([STANDBY/ON]) @5 [FUNCTION] button w [MASTER VOLUME] dial @6 [PART ON/OFF] e [DEMO] button • [VOICE L] button r [RECORD] button • [VOICE R1] button t [DIRECT ACCESS] button • [VOICE R2] button y [DSP] button @7 Number buttons [1]–[0], [–/NO], [+/YES]...

  • Page 6: Circuit Board Layout & Wiring

    PSR-550 CIRCUIT BOARD LAYOUT & WIRING Lower case side Speaker Speaker (Woofer-R) (Woofer-L) Upper case side Speaker W-PNS (Tweeter-L) W-MID W-DMV W-ANA W-STB W-PNL MK-H MKS5 MK-L W-MVR W-PIT Speaker W-PND (Tweeter-R) Caution : Be sure to attach the removed filament tape just as it was before removal.
  • Page 7 PSR-550 Upper case side Speaker Speaker (Tweeter-R) (Tweeter-L) W-PNL W-LCD W-STB PN 4/5 PN 5/5 W-PIT W-PNS W-EP2 W-ENC W-EP2 W-MVR PN 2/5 PN 1/5 W-PND PN 3/5 Back Light Assembly & LCD Side view BLUE WHITE Back Light Assembly Location Part No.
  • Page 8 X800 5MHz X100 16MHz 7MHz 2,5,6,9,12, 15,16,19 X200 33.8688MHz IC230 44P...

  • Page 9: Disassembly Procedure

    PSR-550 DISASSEMBLY PROCEDURE Lower Case Assembly 1-1. Remove the fourteen (14) screws marked [430A] and the four (4) screws marked [440A]. The lower (Time required : About 5 min.) case assembly can then be removed. (Fig. 1) [440A] [430A] [440A]...
  • Page 10 PSR-550 [L30] [L30] Speaker (Woofer) Speaker (Woofer) [420H]X2 Shield Box L [450] [450] [420H] [450] [420A] [420A] Speaker Speaker (Tweeter) (Tweeter) Shield Keyboard MKS5 [440B] [430B] [450] [430B] [30] [30] [440B] Box U Assembly [30] : Bind Head Tapping Screw-P 3.0X8...
  • Page 11 PSR-550 PN 4/5 Circuit Board 6-3. Remove the AM circuit board. (See procedure 5) 6-4. Remove the volume knob from the control panel (Time required : About 15 min.) side. (Fig. 7) 6-1. Remove the lower case assembly. (See procedure 1) 6-5.
  • Page 12 PSR-550 Keyboard Assembly [140] (Time required : About 10 min.) Black Key 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) [140] Black Key...

  • Page 13: Lsi Pin Description

    PSR-550 LSI PIN DESCRIPTION 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) ...............
  • Page 14 PSR-550 HD6437042AF90F (XZ787100) CPU DM : IC100 NAME FUNCTION NAME FUNCTION TIOC4/DACK0/PE14 MTU I/O / DMA acknowledge / Port E PE15 Port E Data bus Ground Ground Data bus Power supply Address bus Data bus Ground XTAL Crystal oscillator Mode control...
  • Page 15 PSR-550 HG73C205AFD (XU947C00) SWX00B (Tone Generator) DM : IC200 NAME FUNCTION NAME FUNCTION Initial clear CMA3 Program address bus RFCLKI PLL Clock CMA8 Program address bus PLL Control CMA2 Program address bus AVDD_PLL Power supply read signal AVSS_PLL Ground CMA1...
  • Page 16 PSR-550 HD63266F (XI939A00) FDC (Floppy Disk Controller) DM : IC800 NAME FUNCTION NAME FUNCTION 8"//5" Data transmission speed /TRKO Track 00 signal XTALSET Clock select /INDEX Index signal /RESET Rest /RDATA Read data input from FDD E//RD Enable/Read XTAL2 Clock...
  • Page 17 PSR-550 S6A0069X10-Q0RJ (XV226A00) LCD DRIVER PN : IC100 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...

  • Page 18: Block Diagram

    PSR-550 IC BLOCK DIAGRAM TC74HCU04AP (IG142200) TC74HC32AP (IR003200) TC74HC74AP (IR007400) SN74HCU04N (IG142250) SN74HC32N (IR0032500) SN74HC74N (IR007450) Hex Inverter Quad 2 Input OR Dual D-Type Flip-Flop AM : IC810 DM : IC360 DM : IC999 1CLR 2CLR INPUTS OUTPUTS TC74HC138AP (IR013800)

  • Page 19: Circuit Boards

    PSR-550 LA4705NA (XQ619A00) M5243AP06 (XU911A00) Power Amplifier Graphic Equalizer AM: IC400 AM : IC370 IN 1-2 IN 1-1 NF 1-2 NF 1-1 1.2k IN 2-1 IN 2-2 NF 2-1 NF 2-2 1.2k IN 3-2 IN 3-1 NF 3-2 NF 3-1 1.2k...

  • Page 20: Circuit Boards

    PSR-550 CIRCUIT BOARDS DM Circuit Board to AM-CN800 to AM-CN530 to AM-CN100 to MKS5-CN1 Component side to PN 1/5-CN401 to PN 1/5-CN501 to PN 1/5-CN301 2NA-V701940-1 1...
  • Page 21 PSR-550 DM Circuit Board Pattern side 2NA-V701940-2 1...
  • Page 22 PSR-550 PN 1/5 Circuit Board to DM-CN750 to DM-CN960 to PN 2/5-CN602 to DM-CN650 A’ to PN 3/5-CN603 Component side to DM-CN150 to DM-CN550 A’ 2NA-V701960-1...
  • Page 23 PSR-550 PN 1/5 Circuit Board B’ Pattern side B’ 2NA-V701960-2...
  • Page 24 PSR-550 AM Circuit Board TO HOST HOST SELECT MIDI FOOT SWITCH to DM-CN170 1999 to SPEAKER (Tw) R to SPEAKER (Wo) Component side C’ PN 2/5 Circuit Board PN 3/5 Circuit Board PITCH BEND to PN 1/5-CN503 to PN 1/5-CN502...
  • Page 25 PSR-550 PHONES/ DC-IN OUTPUT 10-12V to DM-CN250 Component side C’ Component side to SPEAKER (Tw) L to PN 4/5-CN801 PN 4/5 Circuit Board PN 5/5 Circuit Board MASTER VOLUME STANDBY/ON to AM-CN520 to AM-CN390 Component side Component side AM : 2NA-V362300 1...
  • Page 26 PSR-550 MK-L Circuit Board to MK-H D’ D’ E’ Component side E’ MKS5 Circuit Board to MK-H MK-L : 2NA-VV58380 to DM-CN180 Component side MKS5 : 2NAKZ-V679750 1...
  • Page 27 PSR-550 MK-H Circuit Board to MKS5-CN4 F’ to MK-L F’ G’ Component side G’ 2NA-VV583900...

  • Page 28: Test Program

    PSR-550 TEST PROGRAM 1. PREPARATION 3. PROCEEDING THROUGH THE TEST 1) PA-6 (AC adaptor) is used. PROGRAM 2) The volume is usually moved to the use position when no MANUAL MODE : volume change is required. 1) When the test program is started, “TEST” appears on 3) Measuring instruments:frequency counter, level meter the LCD.
  • Page 29 PSR-550 TEST No. LCD (initial) Test Functions and Judgment Criteria 019:D/A Noise Connect the level meter (with a JIS-C filter) to the [PHONES] jack. (33 ohm load) Set the [MASTER VOLUME] at maximum. Check D/A converter noise. PHONES L/R : Less than -80.0 dBm 020:SW,LED Chk Check the switches on the panel and LED.
  • Page 30 PSR-550 TEST No. LCD (initial) Test Functions and Judgment Criteria 048:Factory Set All the RAMs are initialized and set to the factory preset data when executing this test. The results appear on the LCD. 049:Test Exit Exit from the test program after executing this test.
  • Page 31 PSR-550 ORDER SWITCH NOTE EXIT Push Exit DEMO Push Demo RECORD Push Record SONG Push Song STYLE Push Style MUSIC DATABASE Push MDB VOICE L Push Voice L VOICE R1 Push Voice R1 VOICE R2 Push Voice R2 ACMP ON/OFF...

  • Page 32: Data Backup & Initialization

    Data Backup Except for the data listed below, all PSR-550 panel settings are reset to their initial settings whenever the power is turned on. The data listed below are backed up - i.e. retained in memory - as long as an AC adaptor is connected or a set of batteries is installed.

  • Page 33: Alert Message List

    PSR-550 ALERT MESSAGE LIST The disk contains no file to be loaded, copied, or be deleted. No File Insert the disk that contains files to be loaded, copied, or deleted. An unformatted disk is inserted. Unformatted Disk An error occurred during execution of a disk operation.
  • Page 34 CannotEnterFunc. when you select a Multi Pad function in the Multi Pad Recording mode. • This message may appear when the PSR-550 is turned on, and Clear Backup indicates that user data temporarily stored in the internal memory has been lost . When this happens, the Data Initialization operation is automatically executed, and the PSR-550 is set to the Style mode.

  • Page 35: Midi Implementation Chart

    PSR-550 MIDI IMPLEMENTATION CHART [Portable Keyboard] Date : 30-NOV-2000 MIDI Implementation Chart Model : PSR-550 Version : 1.0 Function... Transmitted Recognized Remarks Basic Default 1 - 16 1 - 16 Channel Changed 1 - 16 1 - 16 Default Mode...

  • Page 36: Parts List

    PARTS LIST CONTENTS OVERALL ASSEMBLY ..........................2 KEYBOARD ASSEMBLY ......................... 5 ELECTRICAL PARTS ........................6 – 13 Notes : DESTINATION ABBREVIATIONS Australian model South African model British model Chinese model Canadian model South-east Asia model German model Taiwan model European model U.S.A.
  • Page 37 PSR-550 OVERALL ASSEMBLY 220 5/5 210b Music Rest 210a Wheel Assembly Upper Case Assembly Keyboard Assembly (See page 5.) L10f L100 L10c L10d L10f L10c Floppy Disk Drive Assembly L10g L10a L10e L10b 330b L140 330a L130 L130 L130 Battery Cover Assembly...
  • Page 38 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK OVERALL ASSEMBLY PSR-550 (V703480) V 7 0 3 8 9 0 0 Upper Case Assembly Upper Case (V703910) V 7 0 3 8 7 0 0 Speaker Grille LEFT V 7 0 3 8 8 0 0...
  • Page 39 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK VA121600 Bushing Adhesive Tape ECT #590S W=15 (ZL35000) Lower Case with Speaker (V703900) V 7 0 3 9 3 0 0 Lower Case Assembly L10a Lower Case (V703940) L10b CB043750 Foot T1.6 BLACK...
  • Page 40 PSR-550 KEYBOARD ASSEMBLY PART NO. DESCRIPTION REMARKS REF NO. RANK V 7 1 2 7 1 0 0 KEYBOARD ASSEMBLY 16M C61 P2M MKS5 PSR-550  EP600280 Bind Head Tapping Screw-P 3.0X8 MFZN2Y  Bind Head Tapping Screw-P 3.0X8 MFZN2BL ...
  • Page 41 PSR-550 ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS REF NO. RANK ELECTRICAL PARTS PSR-550 V 3 6 2 3 0 0 0 Circuit Board (XV935C0) V 7 0 1 9 4 0 0 Circuit Board (XZ670D0) VV583900 Circuit Board MK-H (XR565C0)
  • Page 42 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK C0812 VC694800 Semiconductive Cera. Cap. 0.1000 25V Z CN100 V I 8 7 8 2 0 0 Cable Holder 51048 4P TE CN390 VK024900 Wire Trap 52147 5P TE CN480 LB918040 Base Post Connector...
  • Page 43 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK R0124 Jumper Wire 0.55 (VA07890) R0300 HF754470 Carbon Resistor 47.0 1/4 J R0301 HF756220 Carbon Resistor 2.2K 1/4 J R0302 HF756220 Carbon Resistor 2.2K 1/4 J R0311 HF755150 Carbon Resistor 150.0 1/4 J...
  • Page 44 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK V 7 0 1 9 4 0 0 Circuit Board (XZ670D0) EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL C0101 VC694800 Semiconductive Cera. Cap. 0.1000 25V Z C0102 UR837100 Electrolytic Cap. 10.00 16.0V...
  • Page 45 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK C0998 VC694800 Semiconductive Cera. Cap. 0.1000 25V Z C0999 VC694800 Semiconductive Cera. Cap. 0.1000 25V Z CA151 VH483900 Ceramic Capacitor Array 100P 50V M CA152 VK994900 Ceramic Capacitor Array 100P 50V M...
  • Page 46 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK R0121 HF757470 Carbon Resistor 47.0K 1/4 J -0123 HF757470 Carbon Resistor 47.0K 1/4 J R0124 HF755100 Carbon Resistor 100.0 1/4 J R0125 HF756100 Carbon Resistor 1.0K 1/4 J R0126 HF756100 Carbon Resistor 1.0K 1/4 J...
  • Page 47 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK TR999 V 3 3 7 5 5 0 0 Transistor 2SC3581 E X0100 V 3 7 9 7 5 0 0 Ceramic Resonator 7MHz EFOMC7004A4 X0200 VV345500 Quartz Crystal Unit DOC-49S5 X0800...
  • Page 48 PSR-550 PART NO. DESCRIPTION REMARKS REF NO. RANK LE205 VC341300 LED Red SLZ-190B-01 ACCOMPANIMENT LE301 V 3 6 2 1 2 0 0 LED Green SLZ-290B-10-T2 REGISTRATION MEMORY LE302 VT387900 LED Red SLZ-190B-10-T2 ENDING/rit. LE303 VT387900 LED Red SLZ-190B-10-T2 MAIN/AUTO FILL B...

  • Page 49: Overall Circuit Diagram

    PSR-550 PSR-550 OVERALL CIRCUIT DIAGRAM 1/2 (DM) DECODER SYSTEM RESET to BACK LIGHT ASS'Y D-FF to PN 1/5-CN501 SRAM 1M to PN 1/5-CN401 D-FF DECODER to AM-CN800 DRAM 4M to PN 1/5-CN301 D-FF to MKS5-CN1 to PN 1/5-CN101 MAIN ROM...

  • Page 50: Overall Circuit Diagram

    PSR-550 OVERALL CIRCUIT DIAGRAM 2/2 (PN, AM, MKS5, MK-L, MK-H) LCD BACK LIGHT TWEETER POWER AMP to DM-CN999 DM-CN250 not installed not installed PHONES/OUTPUT REGULATOR LCD DRIVER LCD DRIVER – PN 5/5 EQUALIZER STANDBY/ON WOOFER to DM-CN920 to BATTERY DM-CN750 –...

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