Yamaha P2500S Service Manual

P1000S/P2500S/P3500S
1
SERVICE MANUAL
PA
011690
P1000S: 200306-69000
P2500S: 200306-89000
P3500S: 200306-125000
Copyright (c) Yamaha Corporation. All rights reserved. PDF-K0121 03.06
HAMAMATSU, JAPAN
CONTENTS
SPECIFICATIONS ............................................... 3/4
DIMENSIONS .......................................................... 5
PERFORMANCE GRAPHS ..................................... 5
PANEL LAYOUT .................................... 6
CIRCUIT BOARD LAYOUT & WIRING
........................... 8
DISASSEMBLY PROCEDURE ............................ 10
IC BLOCK DIAGRAM ................................. 16
CIRCUIT BOARDS ...................................... 16
INSPECTIONS ..................................................... 26/30
PARTS LIST
BLOCK DIAGRAM
WIRING DIAGRAM
OVERALL CIRCUIT DIAGRAM
POWER AMPLIFIER
P1000S (J model only)
P2500S
P3500S
（ 総合仕様 ）
（寸法図）
（特性図）
（パネルレイアウト）
（ユニットレイアウト＆結線図）
（分解手順）
（ICブロック図）
（シート基板図）
（検査）
（ブロックダイアグラム）
（配線図）
（総回路図）
（目次）
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

Yamaha P2500S Specifications

General

Total Harmonic Distortion	Less than 0.1%
Input Impedance	20k ohms (balanced), 10k ohms (unbalanced)
Cooling System	Variable-speed fan
Power Output (8 ohms, 20Hz-20kHz)	500W
Power Output (8 ohms, stereo)	500W
Power Output (8 ohms, 1kHz, 0.5% THD)	550W
Connectors (Input)	XLR-3-31 type
Connectors (Output)	Binding posts
Dimensions	480 x 88 x 456 mm

Summary

Specifications

Power Output & Bandwidth

Details power output levels and bandwidth across frequencies and impedances.

Distortion, Noise & Sensitivity

Measures harmonic/intermodulation distortion, noise, and input sensitivity.

Controls, Connectors & Indicators

Lists front/rear panel controls, connectors, and indicators.

Protection, Cooling & Power Specs

Details protection circuits, cooling, power requirements, and consumption.

Dimensions, Weight & Accessories

Physical size, weight, and included accessories of the amplifier.

Dimensions

Performance Graphs

Panel Layout

Power & Status Indicators

Describes POWER, TEMP, PROTECTION, CLIP, and SIGNAL indicators.

Volume & Processing Controls

Details volume knobs and YS Processing controls.

Front Panel Features

Lists air intakes and other front panel elements.

Panel Layout (Rear Panel)

Filter & Frequency Controls

Controls for filter frequency and type.

Mode & Processing Switches

Switches for operating mode and YS Processing.

Input/Output Connectors

Connectors for audio input and speaker output signals.

Ground Terminal & HPF Switch

Ground connection and P1000S HPF switch.

Circuit Board Layout & Wiring

Board Views & Wiring Diagram

Illustrates top, front views, and overall internal wiring connections.

Circuit Board Layout & Wiring (Detail Drawings)

Detail drawing A (A部詳細)

Close-up illustration of specific components and wiring in section A.

Detail drawing B (B部詳細)

Close-up illustration of specific components and wiring in section B.

Detail drawing C (C部詳細)

Close-up illustration of specific components and wiring in section C.

Detail drawing OUT2 circuit board

Detailed view of the OUT2 circuit board and its connections.

Disassembly Procedure

Top Cover & DC Circuit Board Removal

Steps to remove the top cover and DC circuit board.

Power Transformer & IN Circuit Board Removal

Procedures for removing the power transformer and IN circuit board.

Disassembly Procedure (Continued)

IN Circuit Board Details & OUT2 Board Removal

Details on removing volume knobs and connector assembly from IN board.

OUT1/OUT2 Boards (P2500S/P3500S) Removal

Procedure for removing OUT1/OUT2 boards from P2500S/P3500S.

Disassembly Procedure (Continued)

OUT2 Circuit Board (P1000S) Cover & Film Removal

Steps to remove speaker terminal cover and earth film.

OUT1/OUT2 Boards (P2500S/P3500S) Cover Attachment

Procedure for removing boards and attaching covers.

Disassembly Procedure (Continued)

Front Panel 1 & VR Circuit Board Removal

Steps to remove the first front panel and VR circuit board.

DC Fan Removal

Steps to remove the DC cooling fan.

Disassembly Procedure (Continued)

LED & PSW Circuit Board Removal

Procedures for removing LED and power switch circuit boards.

PA Unit & PA Circuit Board Removal

Steps to remove the PA unit and its circuit board.

Disassembly Procedure (Continued)

Front Panel & Knob Removal

Details on removing front panels and power switch knob.

PA Unit Component Removal

Details on removing the PA unit and its internal components.

IC Block Diagram

Dual Op-Amp Block Diagrams

Diagrams for dual operational amplifiers in IN and DC/PA sections.

Circuit Boards (シート基板図)

DC Circuit Board Layouts

Layout diagrams for the DC circuit board (X3499B0/C0).

IN Circuit Board Layouts

Layout diagrams for the IN circuit board (X3501B0/C0).

PA Circuit Board Layout

Layout diagram for the PA circuit board (X3500B0).

SUB Circuit Board Layouts

Layout diagrams for SUB circuit boards (LED, OUT1, OUT2, PSW, VR).

Circuit Boards (Layout Diagrams)

IN Circuit Board (X3501C0) Layout

Layout diagram for the IN circuit board, showing component placement.

Circuit Boards (Layout Diagrams)

DC Circuit Board (X3499C0) Layout

Layout diagram for the DC circuit board, showing component placement.

SUB (VR) Circuit Board Layout

Layout diagram for the SUB VR circuit board.

Circuit Boards (Layout Diagrams)

SUB (VR) Circuit Board Layout

Pattern side layout for the SUB VR circuit board.

Circuit Boards (Layout Diagrams)

DC Circuit Board (X3499C0) Layout

Pattern side layout for the DC circuit board.

SUB Board (PSW) Layouts

Component and pattern side layouts for the SUB PSW circuit board.

Circuit Boards (Layout Diagrams)

DC Circuit Board (X3499B0) Layout

Pattern side layout for the DC circuit board.

Circuit Boards (Layout Diagrams)

PA Circuit Board Layout

Component side layout for the PA circuit board.

Circuit Boards (Layout Diagrams)

PA Circuit Board Layouts

Component and pattern side layouts for the PA circuit board.

Circuit Boards (Layout Diagrams)

SUB (OUT2) Circuit Board Layout

Component side layout for the SUB OUT2 circuit board.

SUB (LED) Circuit Board Layout

Component side layout for the SUB LED circuit board.

SUB (OUT1) Circuit Board Layout

Component side layout for the SUB OUT1 circuit board.

Circuit Boards (Layout Diagrams)

SUB (OUT2) Circuit Board Layout

Pattern side layout for the SUB OUT2 circuit board.

SUB (LED) Circuit Board Layout

Pattern side layout for the SUB LED circuit board.

SUB (OUT1) Circuit Board Layout

Pattern side layout for the SUB OUT1 circuit board.

Inspections

Scope of Inspection

Defines the applicability of the inspection specifications.

Preparation for STEREO/PARALLEL Mode

Lists required settings and equipment for mode preparation.

POWER LED, PROTECTION LED, Muting Time Check

Checks power indicators and muting delay after power on.

Fan and TEMP LED Check

Verifies fan operation and temperature indicator functionality.

Idle Current Adjustment

Procedure to measure and adjust idle current for each channel.

DC Voltage at Output Terminals

Measures DC voltage at the output terminals.

Gain Check (PARALLEL Mode)

Checks amplifier gain levels in PARALLEL mode.

Frequency Response Measurement

Measures amplifier output across different frequencies.

SUB WOOFER Filter Performance

Verifies performance with SUB WOOFER filter settings.

LOW CUT Filter Performance

Verifies performance with LOW CUT filter settings.

YS Processing Functionality Check

Checks YS Processing function and indicator status.

HPF Switch Functionality (P1000S)

Verifies High-Pass Filter function on P1000S.

Distortion Factor Measurement

Measures total harmonic distortion at specified output levels.

Channel Crosstalk Measurement

Checks the isolation between amplifier channels.

Output Noise Level Measurement

Measures the noise level at the output terminals.

Stability Check

Checks for overshoot and ringing with capacitive and resistive loads.

DC Fault Protection Circuit Test

Verifies the protection circuit's response to DC faults.

Efficiency Measurement

Measures the amplifier's electrical power efficiency.

VI Limiter and Compressor Check

Checks the VI limiter and compressor function, including CLIP LED.

SIGNAL LED Check

Verifies the SIGNAL LED behavior with input signals.

Preparation for BRIDGE Mode

Lists settings for preparing the amplifier for BRIDGE mode.

Gain Check

Checks amplifier gain levels.

Frequency Response Check

Measures amplifier output across different frequencies.

Distortion Factor Check

Measures total harmonic distortion at specified output levels.

Output Noise Level Check

Measures the noise level at the output terminals.

Preparation of Delivery

Details the final settings before shipping or delivery.

Parts List

Overall Assembly Parts

List of parts for the complete unit assembly.

P1000S Electrical Parts

List of electrical components specific to the P1000S model.

P2500S Electrical Parts

List of electrical components specific to the P2500S model.

P3500S Electrical Parts

List of electrical components specific to the P3500S model.

Parts List Notes & Abbreviations

Explanation of codes, notes, and warnings for the parts list.

Parts List (P1000S Electrical Parts)

Main Chassis & PA Unit Parts

Part numbers for the main chassis and PA unit assembly.

Power Transformer Part Numbers

Part numbers for the power transformer assembly.

Circuit Board Part Numbers

Part numbers for various circuit boards.

Parts List (P1000S Electrical Parts - Continued)

Screw & Connector Part Numbers

Part numbers for screws and connector assemblies.

Diode Stack, Fuse, IC, & Wire Part Numbers

Part numbers for diodes, fuses, ICs, and wires.

Transistor Part Numbers

Part numbers for transistors.

Parts List (P1000S Electrical Parts - Continued)

Transistor Part Numbers

Part numbers for various transistors.

Resistor Part Numbers

Part numbers for resistors.

Diode Stack & Screw Part Numbers

Part numbers for diode stacks and screws.

Parts List (P1000S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Metal Film Resistor Part Numbers

Part numbers for metal film resistors.

Parts List (P1000S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Metal Oxide Film Resistor Part Numbers

Part numbers for metal oxide film resistors.

Parts List (P1000S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Metal Oxide Film Resistor Part Numbers

Part numbers for metal oxide film resistors.

Parts List (P1000S Electrical Parts - Mixed Components)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Metal Film Resistor Part Numbers

Part numbers for metal film resistors.

Slide Switch Part Numbers

Part numbers for slide switches.

Circuit Board Part Numbers

Part numbers for various circuit boards.

Parts List (P1000S Electrical Parts - Mixed Components)

Mica Capacitor Part Numbers

Part numbers for mica capacitors.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Electrolytic Cap. Part Numbers

Part numbers for electrolytic capacitors.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Connector Base Post Part Numbers

Part numbers for connector base posts.

Fasten Terminal Part Numbers

Part numbers for fasten terminals.

Diode Part Numbers

Part numbers for diodes.

Zener Diode Part Numbers

Part numbers for zener diodes.

Coil Part Numbers

Part numbers for coils.

Transistor Part Numbers

Part numbers for transistors.

Parts List (P1000S Electrical Parts - Mixed Components)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Metal Oxide Film Resistor Part Numbers

Part numbers for metal oxide film resistors.

Relay Part Numbers

Part numbers for relays.

Trimmer Potentiometer Part Numbers

Part numbers for trimmer potentiometers.

Parts List (P1000S Electrical Parts - Mixed Components)

Digital Transistor Part Numbers

Part numbers for digital transistors.

Transistor Part Numbers

Part numbers for transistors.

Carbon Resistor Part Numbers

Part numbers for carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Metal Oxide Film Resistor Part Numbers

Part numbers for metal oxide film resistors.

Push Switch Part Numbers

Part numbers for push switches.

Circuit Board Part Numbers

Part numbers for circuit boards.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Connector Assembly Part Numbers

Part numbers for connector assemblies.

Phone Jack Part Numbers

Part numbers for phone jacks.

Receptacle Part Numbers

Part numbers for receptacles.

Parts List (P1000S Electrical Parts - Mixed Components)

Rotary Variable Resistor Part Numbers

Part numbers for rotary variable resistors.

Power Transformer Part Numbers

Part numbers for power transformers.

Diode Stack Part Number

Part number for diode stack.

AC Cord Part Numbers

Part numbers for AC power cords.

Fan Part Number

Part number for the cooling fan.

Parts List (P2500S Electrical Parts)

Circuit Board Part Numbers

Part numbers for various circuit boards.

Fuse Holder Part Numbers

Part numbers for fuse holders.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Electrolytic Cap. Part Numbers

Part numbers for electrolytic capacitors.

Parts List (P2500S Electrical Parts - Continued)

Transistor Part Numbers

Part numbers for various transistors.

Digital Transistor Part Numbers

Part numbers for digital transistors.

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Metal Film Resistor Part Numbers

Part numbers for metal film resistors.

Diode Part Numbers

Part numbers for diodes.

Zener Diode Part Numbers

Part numbers for zener diodes.

IC Part Numbers

Part numbers for integrated circuits.

Connector Assembly Part Numbers

Part numbers for connector assemblies.

Phone Jack Part Numbers

Part numbers for phone jacks.

Cannon Connector Part Numbers

Part numbers for cannon connectors.

Parts List (P2500S Electrical Parts - Resistors)

Digital Transistor Part Numbers

Part numbers for digital transistors.

Transistor Part Numbers

Part numbers for transistors.

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Parts List (P2500S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Metal Film Resistor Part Numbers

Part numbers for metal film resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Relay Part Numbers

Part numbers for relays.

Trimmer Potentiometer Part Numbers

Part numbers for trimmer potentiometers.

Circuit Board Part Numbers

Part numbers for circuit boards.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Electrolytic Cap. Part Numbers

Part numbers for electrolytic capacitors.

Parts List (P2500S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Parts List (P2500S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Parts List (P2500S Electrical Parts - Mixed Components)

Diode Part Numbers

Part numbers for diodes.

Zener Diode Part Numbers

Part numbers for zener diodes.

Fuse Part Numbers

Part numbers for fuses.

IC Part Numbers

Part numbers for integrated circuits.

Jumper Wire Part Numbers

Part numbers for jumper wires.

GND Plate Part Numbers

Part numbers for ground plates.

Transistor Part Numbers

Part numbers for transistors.

Digital Transistor Part Numbers

Part numbers for digital transistors.

Parts List (P2500S Electrical Parts - Mixed Components)

LED Spacer Part Numbers

Part numbers for LED spacers.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Connector Base Post Part Numbers

Part numbers for connector base posts.

LED Part Numbers

Part numbers for LEDs.

Digital Transistor Part Numbers

Part numbers for digital transistors.

Transistor Part Numbers

Part numbers for transistors.

Carbon Resistor Part Numbers

Part numbers for carbon resistors.

Phone Jack Part Numbers

Part numbers for phone jacks.

Receptacle Part Numbers

Part numbers for receptacles.

Connector Assembly Part Numbers

Part numbers for connector assemblies.

Circuit Board Part Numbers

Part numbers for circuit boards.

Parts List (P2500S Electrical Parts - Mixed Components)

Connector Assembly Part Numbers

Part numbers for connector assemblies.

Circuit Board Part Numbers

Part numbers for circuit boards.

Rotary Variable Resistor Part Numbers

Part numbers for rotary variable resistors.

Power Transformer Part Numbers

Part numbers for power transformers.

Diode Stack Part Number

Part number for diode stack.

AC Cord Part Numbers

Part numbers for AC power cords.

Fan Part Number

Part number for the cooling fan.

Parts List (P3500S Electrical Parts)

Circuit Board Part Numbers

Part numbers for various circuit boards.

Fuse Holder Part Numbers

Part numbers for fuse holders.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Electrolytic Cap. Part Numbers

Part numbers for electrolytic capacitors.

Parts List (P3500S Electrical Parts - Mixed Components)

Diode Part Numbers

Part numbers for diodes.

Zener Diode Part Numbers

Part numbers for zener diodes.

Fuse Part Numbers

Part numbers for fuses.

IC Part Numbers

Part numbers for integrated circuits.

Jumper Wire Part Numbers

Part numbers for jumper wires.

Transistor Part Numbers

Part numbers for transistors.

Digital Transistor Part Numbers

Part numbers for digital transistors.

Parts List (P3500S Electrical Parts - Resistors)

Transistor Part Numbers

Part numbers for transistors.

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Parts List (P3500S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Parts List (P3500S Electrical Parts - Resistors)

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Metal Film Resistor Part Numbers

Part numbers for metal film resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Parts List (P3500S Electrical Parts - Resistors)

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Parts List (P3500S Electrical Parts - Mixed Components)

Flame Proof C. Resistor Part Numbers

Part numbers for flame-proof carbon resistors.

Wire Wound Resistor Part Numbers

Part numbers for wire-wound resistors.

Carbon Resistor Part Numbers

Part numbers for various carbon resistors.

Metal Oxide Film Resistor Part Numbers

Part numbers for metal oxide film resistors.

Relay Part Numbers

Part numbers for relays.

Trimmer Potentiometer Part Numbers

Part numbers for trimmer potentiometers.

Parts List (P3500S Electrical Parts - Mixed Components)

Circuit Board Part Numbers

Part numbers for circuit boards.

LED Spacer Part Numbers

Part numbers for LED spacers.

Ceramic Capacitor Part Numbers

Part numbers for ceramic capacitors.

Mylar Capacitor Part Numbers

Part numbers for mylar capacitors.

Connector Base Post Part Numbers

Part numbers for connector base posts.

LED Part Numbers

Part numbers for LEDs.

Phone Jack Part Numbers

Part numbers for phone jacks.

Receptacle Part Numbers

Part numbers for receptacles.

Parts List (P3500S Electrical Parts - Mixed Components)

Connector Assembly Part Numbers

Part numbers for connector assemblies.

Circuit Board Part Numbers

Part numbers for circuit boards.

Rotary Variable Resistor Part Numbers

Part numbers for rotary variable resistors.

Power Transformer Part Numbers

Part numbers for power transformers.

Diode Stack Part Number

Part number for diode stack.

AC Cord Part Numbers

Part numbers for AC power cords.

Fan Part Number

Part number for the cooling fan.

Circuit Diagram

P1000S Block Diagram

Block diagram illustrating signal flow for the P1000S model.

P2500S/P3500S Block Diagram

Block diagram illustrating signal flow for P2500S/P3500S models.

Wiring Diagram

Diagram showing internal wiring connections.

Overall Circuit Diagram (DC)

Detailed schematic of the DC section of the circuit.

IN Circuit Diagram

Schematic of the input circuitry.

DC Circuit Diagram

Schematic of the DC power supply and related circuits.

PA Circuit Diagram

Schematic of the Power Amplifier circuitry.

SUB Circuit Diagrams

Schematic of the SUB, LED, output, and control circuits.

P1000S BLOCK DIAGRAM

P2500S/P3500S BLOCK DIAGRAM

WIRING DIAGRAM

OVERALL CIRCUIT DIAGRAM 1/4 (DC)

OVERALL CIRCUIT DIAGRAM 2/4 (IN)

OVERALL CIRCUIT DIAGRAM 3/4 (PA)

OVERALL CIRCUIT DIAGRAM 4/4 [SUB (LED, OUT1, OUT2, PSW, VR) ]