Yamaha P-45B User Manual

SERVICE MANUAL
Copyright (c) Yamaha Corporation. All rights reserved. PDF ’15.02
■
CONTENTS
（目次）
SPECIFICATIONS
（総合仕様）
. . . . . . . . . . . . . . . . . . 3
PANEL LAYOUT
（パネルレイアウト）
. . . . . . . . . . . 5
CIRCUIT BOARD LAYOUT
（ユニットレイアウト）
. 7
DISASSEMBLY PROCEDURE
（分解手順）
. . . . . . . . 9
CIRCUIT BOARDS
（シート基板図）
. . . . . . . . . . . . 25
TEST PROGRAM
（テストプログラム）
. . . . . . . 40/50
DM CIRCUIT BOARD CHECK METHOD
（DM シートチェック方法）
. . . . . . . . . . . . . . . . . . . 60/62
SYSTEM BOOTING FLOWCHART
（起動フローチャート）
. . . . . . . . . . . . . . . . . . . . 64/66
CL
001909
DIGITAL PIANO
DATA BACKUP AND INITIALIZING
（バックアップと初期化）
. . . . . . . . . . . . . . . . . . . . . . . 68
USER DATA BACKUP
（ユーザーデータのバックアップ）
. . . . . . . . . . . . . . 70/71
PARTS LIST
BLOCK DIAGRAM
（ブロックダイアグラム）
WIRING DIAGRAM
（基板結線図）
CIRCUIT DIAGRAM
（回路図）
HAMAMATSU, JAPAN
P-115B/P-115WH/P-45B
P-115B
P-115WH
P-45B

Yamaha P-45B Specifications

General

Type	Digital Piano
Voices	10
Effects	Reverb (4 types)
Sound Source	AWM Stereo Sampling
Dual/Layers	Yes
Duo Mode	Yes
Metronome	Yes
Touch Sensitivity	Hard/Medium/Soft/Fixed
Demo Songs	10
Amplifiers	6 W x 2
Speakers	12 cm x 2
Weight	11.5 kg (25 lbs, 6 oz)
Included Accessories	Music Rest, Pedal/Footswitch, AC Adaptor
Keyboard	88-key Graded Hammer Standard (GHS) keyboard
Polyphony	64
Transpose	Yes
Tuning	414.8 - 440.0 - 446.8 Hz
Connectors	Headphones, Sustain Pedal, USB to Host
Power Supply	PA-150
Dimensions	1326 x 154 x 295 mm
Built-in Songs	10 Voice Demo Songs + 10 Piano Preset Songs

Summary

WARNING

SPECIFICATIONS

DISASSEMBLY PROCEDURE

A. DISASSEMBLY OF P-115B/P-115WH

Disassembly guide specific to P-115B and P-115WH models.

B. DISASSEMBLY OF P-45B

Disassembly guide specific to the P-45B model.

C. Disassembling the Keyboard Assembly

Procedure for disassembling the keyboard assembly.

D. Assembling the Keyboard Assembly

Procedure for assembling the keyboard assembly.

TEST PROGRAM

DM CIRCUIT BOARD CHECK METHOD

PARTS LIST

OVERALL ASSEMBLY

Exploded view and parts list for the overall assembly.

GHL KEYBOARD ASSEMBLY

Exploded view and parts list for the GHL keyboard assembly.

ELECTRICAL PARTS

List of electrical components and their specifications.

CIRCUIT DIAGRAM

BLOCK DIAGRAM

High-level overview of signal flow and component interaction.

WIRING DIAGRAM

Diagrams showing electrical connections between boards and components.

P-115B/P-115WH PNJK Circuit Diagram

Circuit diagram for PNJK, HP, JK, PN1, PN2 boards (P-115B/P-115WH).