Download Print this page

Yamaha PORTATONE PSR-740 Service Manual

Hide thumbs Also See for PORTATONE PSR-740:

Advertisement

PK
001627
PSR-740 19990901-160000
PSR-640 19990901-120000
SERVICE MANUAL
CONTENTS
SPECIFICATIONS
PANEL LAYOUT
CIRCUIT BOARD LAYOUT
DISASSEMBLY PROCEDURE
CIRCUIT BOARDS
MIDI DATA FORMAT
PSR-740 MIDI IMPLEMENTATION CHART ......................... 49
PSR-640 MIDI IMPLEMENTATION CHART ......................... 50
PARTS LIST
OVERALL CIRCUIT DIAGRAM
.............................................. 3/4
...................................... 5
................. 8
............................. 10
............................... 14
.................................. 19
........................................ 20
............................. 25/27
.......................................... 29
................... 30/32
................. 34
HAMAMATSU, JAPAN
1.82K-9201
Printed in Japan '99.08
PSR-740
PSR-640
.... 6
.... 7

Advertisement

loading

Summary of Contents for Yamaha PORTATONE PSR-740

  • Page 1: Table Of Contents

    SERVICE MANUAL PSR-740 PSR-640 CONTENTS SPECIFICATIONS ..........3/4 PANEL LAYOUT ........5 PSR-740 BLOCK DIAGRAM ..6 PSR-640 BLOCK DIAGRAM ..7 CIRCUIT BOARD LAYOUT ....8 DISASSEMBLY PROCEDURE ......10 LSI PIN DESCRIPTION ....... 14 IC BLOCK DIAGRAM ........19 CIRCUIT BOARDS ........
  • Page 2: Psr-740 Block Diagram

    PSR-740/PSR-640 PSR-740 BLOCK DIAGRAM IC16 IC33 IC17 IC29 IC21 IC19 IC18 IC20 1 3 5 7 20 21 40 10 13 14 37 17-19 21 IC24 IC11 IC12 IC13 94,96 IC15 11 13 32 11 13 32 22 24 29 IC14 IC15 IC23...
  • Page 3: Psr-640 Block Diagram

    PSR-740/PSR-640 PSR-640 BLOCK DIAGRAM IC420 TR501-505 IC530 IC800 IC400 IC510 IC500 IC430 IC410 10 13 14 37 1 3 5 7 20 21 40 IC190 IC350 IC310 IC320 IC300 IC330 IC100 11 13 32 11 13 32 22 24 29 13 14 31 30 IC360 IC360...
  • Page 4: Lsi Pin Description

    PSR-740/PSR-640 LSI PIN DESCRIPTION SH-7043A (XW485100) CPU SH-7043 (XW180100) CPU NAME FUNCTION NAME FUNCTION  /WRHH/PA23 HH write/Port A   DACK0/PE14 DMA transfer strobe/Port E Data bus   /WRHL/PA22 HL write/Port A   /CASHH/PA21 HH Column address strobe/Port A DACK1/PE15 DMA transfer strobe/Port E Power supply...
  • Page 5 PSR-740/PSR-640 HG73C205AFD (XU947C00) SWX00B TONE GENERATOR 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 Program address bus MODE0 SWX dual mode high byte effective signal...
  • Page 6 PSR-740/PSR-640 TC203C760HF-002 (XS725A00) SWP30B (AWM Tone Generator coped with MEG) Standard Wave Processor NAME FUNCTION NAME FUNCTION (Ground) (Ground) HMD0 HMD1 HMD2 HMD3 HMD4 HMD5 Address bus internal register HMD6 HMD7 Wave memory data bus (Upper data memory) HMD8 HMD9 CA10 HMD10 CA11...
  • Page 7 PSR-740/PSR-640 YSS236-F (XT013A00) VOP3 NAME FUNCTION NAME FUNCTION Power supply WA17 Serial output WA16 WA15 Ground WA14 Power supply External memory address bus WA13 WA12 WA11 Serial output WA10 Ground Power supply WDCK Data enable for DAC WA09 SWPKON SWP00 format key on output WA08 IRQN EG interrupt...
  • Page 8 PSR-740/PSR-640 HD63B05V0F073P (XR951A00) CPU NAME FUNCTION NAME FUNCTION  /RES Reset   /INT Interrupt request   Non-maskable interrupt    Port C            Port A   ...
  • Page 9: Ic Block Diagram

    PSR-740/PSR-640 IC BLOCK DIAGRAM SN74HCU04NSR (XC723A00) SN74HC08NSR (XD831A00) TC74HC32AF (XN241A00) SN74HCU04N (IG142250) HD74LVC08FP (XU720A00) Quad 2 Input OR HD63266F (XI939A00) FDC (Floppy Disk Controller) Hex Inverter Quad 2 Input AND DM: IC14(PSR-740) IC360(PSR-640) IC10,16(PSR-740) IC420(PSR-640) DM: IC15(PSR-740) IC370(PSR-640) NAME FUNCTION NAME FUNCTION JACK: IC02...
  • Page 10: Test Program

    PSR-740/PSR-640 TEST PROGRAM A. PREPARATION 1) PA-6 (AC adaptor) is used. 2) The volume is usually moved to the use position when no volume change is required. 3) Measuring instruments: frequency counter, level meter (with JIS-C filter) Note: Connect a stereo plug to the [PHONES] jack at 33 ohms. 4) Jigs: foot switch, MIDI cable, floppy disk (2HD &...
  • Page 11 PSR-740/PSR-640 015: Output L Connect the level meter (with a JIS-C filter) to the [PHONES] jack. (33 ohm load) Set the [MASTER VOLUME] at maximum and check the output level (1 kHz). PHONES L: -8.0 dBm +/- 2 dB PHONES R: less than -50.0 dBm Connect the monaural plugs of the level meter (with a JIS-C filter) to the [AUX OUT] jacks.
  • Page 12: Data Initialization

    PSR-740/PSR-640 DATA INITIALIZATION CAUTION All data can be initialized and restored to the factory preset condition by turning on the power • All registration and User while holding the highest (rightmost) white key on the keyboard. “Now initializing the internal Style/Pad memory data, memory...”...
  • Page 13: Alert Message List

    PSR-740/PSR-640 ALERT MESSAGE LIST The disk contains no file to be loaded, copied, or be deleted. No file on disk! Insert the disk that contains files to be loaded, copied, or deleted. Insert another disk. An unformatted disk is inserted. Unformatted disk! An error occurred during execution of a disk operation.
  • Page 14 PSR-740/PSR-640 This message appears when executing the Quantize or Recording Memory full! operations (in the Style Recording mode) when the internal memory is full. Clear unnecessary data. This message appears when you attempt to edit, quantize or clear the Data not found! track which contains no data in the Record mode.
  • Page 15 PSR-740 PSR-740 CIRCUIT DIAGRAM (DM1/2, MKS3, MKH, MKL, INV) MKS3 28CC1-8811360 28CC1-8812655 28CC1-8811360 DECODER SRAM 1M INVETER to PN1-CN8 EPROM MAIN1 32M D-FF TRANSISTOR ARRAY Ceramic Capacitor to PN1-CN2 DRAM 4M : Mylar Capacitor to JACK-JK5 : Metal Oxide Film Resistor EPROM MAIN2 32M Note : See parts list for details of circuit board component parts...
  • Page 16 PSR-740 PSR-740 CIRCUIT DIAGRAM (DM2/2, MIC-JACK, MIC) LED DRIVER INVERTER WAVE ROM LL 32M WAVE ROM LH 16M (RE) (GR) 0P AMP 560P INVERTER SWP30B WAVE ROM HH 16M WAVE ROM HL 32M 4.7K 5600p 0P AMP REGULATOR +3.3V 28CC1-8814266 DRAM 4M OP AMP OP AMP...
  • Page 17 PSR-640 PSR-640 CIRCUIT DIAGRAM (DM, MKS3, MKH, MKL, INV) MKS3 28CC1-8811360 28CC1-8812655 28CC1-8811360 DECODER RESET D-FF to PN1-CN2 DECODER DECODER to PN1-CN8 PROGRAM1 ROM H 32M SRAM 1M TRANSISTOR ARRAY DECODER to PN1-CN1 to JACK-JK5 DRAM 16M TRANSISTOR ARRAY L C D D - FF PROGRAM2 ROM L32M SRAM 256K...
  • Page 18 PSR-740 / PSR-640 PSR-740 / PSR-640 OVERALL CIRCUIT DIAGRAM (AM, HP, P.SW, VR, JACK, PN1, PN2, PN3, PN4, WH1, WH2, WH3, ENC) FOOT SWITCH REGULATOR +9V FOOT VOLUME to DM - CN2 EQUALIZER (PSR-740) to DM - CN910 (PSR-640) P.SW C101 28CC1-8813198 EQUALIZER...

This manual is also suitable for:

Portatone psr-640