Yamaha PSR-S770 Service Manual

HAMAMATSU, JAPAN
PK
001917
SERVICE MANUAL
Copyright (c) Yamaha Corporation. All rights reserved. PDF ’15.07
SPECIFICATIONS ............................................................... 3
PANEL LAYOUT .................................................................. 5
CIRCUIT BOARD LAYOUT & WIRING ................................ 8
DISASSEMBLY PROCEDURE .......................................... 12
CIRCUIT BOARDS ............................................................ 21
TEST PROGRAM .............................................................. 38
INITIAL SETTING .............................................................. 54
PSR-S770 SYSTEM BOOTING FLOWCHART ................. 55
PSR-S970 SYSTEM BOOTING FLOWCHART ................. 57
PSR-S770 DMM CIRCUIT BOARD CHECK METHOD ............. 59
PSR-S970 DMH CIRCUIT BOARD CHECK METHOD ............. 61
RESETTING TO THE FACTORY-PROGRAMMED SETTINGS ............ 63
DATA BACKUP .................................................................. 64
VERSION UPGRADE ........................................................ 65
PARTS LIST
BLOCK DIAGRAM
CIRCUIT DIAGRAM
CONTENTS
DIGITAL WORKSTATION
PSR-S770
PSR-S970

Yamaha PSR-S770 Specifications

General

Keyboard	61 keys
Polyphony	128 notes
Music Finder	Yes
Internal Memory	Approx. 13 MB
Amplifiers	15 W x 2
Power Supply	PA-300C or an equivalent recommended by Yamaha
Effects	Reverb, Chorus, DSP, Master Compressor, Master EQ, Part EQ
Style Control	INTRO, MAIN VARIATION x 4, FILL x 4, BREAK, ENDING
One Touch Setting (OTS)	4 per Style
Audio Recorder/Player	Yes
Display	TFT Color Wide VGA LCD
Connectivity	USB TO HOST, USB TO DEVICE, MIDI, AUX IN, LINE OUT
Speakers	13 cm x 2 + 5 cm x 2
Dimensions	1002 x 437 x 148 mm
Weight	11.1 kg