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Yamaha P-105B User Manual

Yamaha P-105B
98 pages
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HAMAMATSU, JAPAN
P-105B/P-105WH/P-35B/
L-85WH/LP-5AWH
SERVICE MANUAL
DIGITAL PIANO
CL
001875
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 PROCEDURES
(分解手順)
.................................................9
LSI PIN DESCRIPTION
(LSI 端子機能表)
................................................... 25
CIRCUIT BOARDS
(シート基板図)
.............................................................31
TEST PROGRAM
(テストプログラム)
..................................................43/49
USER DATA BACKUP
(ユーザーデータのバックアップ)
.......................55/56
SYSTEM BOOTING FLOWCHART
(起動フローチャート)
....................57/59
DM CIRCUIT BOARD CHECK METHOD
(DM シートチェック方法)
.....61/63
PARTS LIST
CIRCUIT DIAGRAM
Copyright (c) Yamaha Corporation. All rights reserved.
AM
YBS ´12.07
P-105B
P-35B
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Yamaha P-105B Specifications

General IconGeneral
RMS rated power14 W
Tweeter diameter50 mm
Number of speakers2
Maximum polyphony (notes)128
Mid-range driver diameter120 mm
Music memory capacity (songs)50
Keys quantity88 keys
Product colorBlack
Power consumption (min)11 W
Weight and Dimensions IconWeight and Dimensions
Depth295 mm
Width1326 mm
Height163 mm
Weight11700 g

Summary

Digital Piano Specifications

Product Specifications Overview

Details on dimensions, weight, keyboard features, voice types, effects, styles, song playback, recording, functions, connectivity, and power.

Panel Layouts

P-105B/P-105WH Panel Layout

Explains controls and connectors on the P-105B/P-105WH panel.

P-35B Panel Layout

Explains controls and connectors on the P-35B panel.

Circuit Board Layouts

P-105B/P-105WH Circuit Board Layout

Diagrams showing placement of circuit boards within the P-105B/P-105WH chassis.

P-35B Circuit Board Layout

Diagrams showing placement of circuit boards within the P-35B chassis.

Disassembly Procedures

P-105B/P-105WH Lower Case & DM Board Disassembly

Steps for removing the lower case assembly and DM circuit board for P-105B/P-105WH.

P-105B/P-105WH Component Disassembly

Instructions for removing JK, HP, Speaker, and Tweeter components.

P-105B/P-105WH Keyboard & Board Removal

Steps to remove keyboard assembly, PN1, and PN2 circuit boards.

P-105B/P-105WH Pedal Assembly Disassembly

Instructions for disassembling the pedal unit and its components.

L-85WH/LP-5AWH Pedal Assembly Disassembly

Instructions for disassembling the pedal unit and its components for L-85WH/LP-5AWH.

P-35B Lower Case & DM Board Disassembly

Steps for removing the lower case assembly and DM circuit board for P-35B.

P-35B Component Disassembly

Instructions for removing JK, Speaker, and Keyboard assembly for P-35B.

P-35B PN Circuit Board Removal

Steps to remove the PN circuit board for P-35B.

Keyboard Assembly Disassembly Details

Detailed steps for removing key assemblies, rubber parts, and hammers.

Hammer Removal Procedure

Specific steps for safely removing hammer mechanisms from the key frame.

Keyboard Assembly Reassembly Steps

Re-assembly steps for keyboard components, including hammers and circuit boards.

LSI Pin Descriptions

YDA175 Digital Power Amplifier Pins

Pin descriptions for the YDA175 digital power amplifier IC.

R8A02042BG SWX08 LSI Pins

Pin details for the R8A02042BG SWX08 LSI.

SWL01U CPU LSI Pins

Pin details for the SWL01U CPU LSI.

μPD789022GB-A15-8E CPU Pins

Pin details for the μPD789022GB-A15-8E CPU LSI.

WM8524GEDT/R DAC LSI Pins

Pin details for the WM8524GEDT/R DAC LSI.

Circuit Board Identification

P-105B/P-105WH Circuit Board Identification

Lists and diagrams for DM, FFC, HP, JK, PN1, PN2, PNRC boards.

P-35B Circuit Board Identification

Lists and diagrams for DM, FFCS, JK, PCS, PN, UNS boards.

GHL Series Circuit Boards

Identification for GHL88H, GHL88L, GHL88M circuit boards.

Test Program

Test Program Preparation and Startup

Required items, PC setup, connections, and boot procedures for diagnostic tests.

Test Procedure Execution and Results

Steps to perform tests and interpret outcomes using audible feedback.

User Data Backup

Data Backup Preparation

Required software, PC setup, and USB cable connection for data backup.

Backup Procedure Steps

Detailed steps for backing up user song data using Musicsoft Downloader.

System Booting Flowcharts

P-105B/P-105WH Booting Process

Flowchart detailing the startup sequence, including test mode and safety checks.

P-35B Booting Process

Flowchart detailing the startup sequence for the P-35B model.

DM Circuit Board Check Method

DM Board Symptoms and Voltage Checks

Initial checks for power/sound issues and test point voltage measurements.

DM Circuit Board Output Checks

Verification of output signals from the DM circuit board to various jacks.

Parts List

Overall Assembly Parts

List of parts for the main structural components of the piano.

Keyboard Assembly Parts

List of parts specific to the keyboard mechanism, including hammers.

Electrical Parts List

List of electronic components like circuit boards, capacitors, resistors, and connectors.

Optional Accessories Parts

List of parts for optional items like keyboard stands and pedal units.

Circuit Diagrams

Block Diagrams

High-level overview of the piano's internal architecture and signal flow.

Wiring Diagrams

Diagrams showing physical connections and cable routing between components.

Overall Circuit Diagrams

Detailed schematics for the DM board and inter-board connections.

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