Denon PMA-2500NE Service Manual

MODEL JP E3 E2 EK EA E1 E1C E1K
PMA-2500NE
P P
INTEGRATED AMPLIFIER
S1158DM/DG1512
Ver. 1
•
Please use this service manual with referring to the operating instructions without fail.
•
Some illustrations using in this service manual are slightly different from the actual set.
• For purposes of improvement, specications and design are subject to change without notice.
e
SERVICE MANUAL
e
D&M Holdings Inc.
Copyright 2015 D&M Holdings Inc. All rights reserved.
WARNING: Violators will be prosecuted to the maximum extent possible.

Denon PMA-2500NE Specifications

General

Damping factor	700
Amplifier class	-
Frequency range	20 - 20000 Hz
Audio output channels	2.0 channels
Signal-to-Noise Ratio (SNR)	110 dB
Total Harmonic Distortion (THD)	0.01 %
RMS power output per channel (4 Ohm)	160 W
RMS power output per channel (8 Ohm)	80 W
Audio (L/R) in	5
Audio (L/R) out	1
Speaker selector	A / B
Phono audio in (L,R)	Yes
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Digital audio optical in	2
AC input voltage	230 V
AC input frequency	50 Hz
Power consumption (standby)	0.2 W
Power consumption (typical)	310 W
Purpose	Home
Material	Metal
Product color	Silver
Volume control	Rotary
Connectivity technology	Wired
Certification	CE, EAC

Weight and Dimensions

Depth	431 mm
Width	434 mm
Height	181 mm
Weight	25000 g

Summary

SAFETY PRECAUTIONS

General Safety Guidelines

Essential safety checks, handling instructions, and precautions during servicing and inspection.

Important Safety Parts

Guidance on identifying and replacing critical safety components to maintain performance and prevent hazards.

SEMICONDUCTOR AND OPTICAL UNIT HANDLING

Electrostatic Discharge Prevention

Procedures for grounding personnel and equipment to prevent electrostatic discharge damage to sensitive components.

TECHNICAL SPECIFICATIONS

Power Amplifier Specifications

Detailed electrical and performance characteristics of the power amplifier stage.

Pre Amplifier Specifications

Input sensitivity, impedance, and RIAA deviation details for the preamplifier.

Overall Performance Metrics

CAUTION IN SERVICING

Unit Initialization Procedure

Steps to initialize the unit after component replacement to restore factory settings.

Service Tools Required

Information on necessary jigs and tools, like the RS-232C conversion board, for firmware updates.

DISASSEMBLY

Component Disassembly Flow

SPECIAL MODE

Special Mode Operations

ADJUSTMENT

Idling Current Adjustment

Procedures for preparing and adjusting the idling current using a DC voltmeter.

PROCEDURE AFTER REPLACING COMPONENTS

PCB Replacement Procedures

Steps required after replacing printed circuit boards, including resistor changes and software updates.

Microprocessor Replacement Procedures

Steps following microprocessor or flash ROM replacement, including software writing.

FIRMWARE UPDATE PROCEDURE

Updating via USB-B

Detailed steps for updating firmware using a USB-B connection and PC software.

Updating via System u-com

Instructions for firmware updates using a system u-com connection and specific writing kit.

TROUBLE SHOOTING

Power Indicator LED Not Lit

Troubleshooting flowchart for issues where the unit does not power on and the LED is off.

Power Indicator LED Flashing

Troubleshooting flowchart for power-on issues where the indicator LED flashes.

No Sound Output

Troubleshooting guide for situations where the unit powers on but produces no audio output.

DIGITAL PCB SIGNAL PROCESSING

Digital Signal Check

Procedures for checking digital signal processing on the DIGITAL PCB, including power supply and waveforms.

DAC PCB CHECK

DAC PCB Signal Path Verification

Steps to verify signal operations and connections on the DAC PCB.

DIGITAL PCB DIR BLOCK

DIR Signal Path Checks

DIGITAL PCB USB-DAC BLOCK

USB-DAC Signal Verification

MEASURING METHOD AND WAVEFORMS

Digital PCB Test Points

SCHEMATIC DIAGRAMS - Power Amp, Diode

SCH01: Power Amp L/R, Diode Schematic

SCHEMATIC DIAGRAMS - Tone, Volume, Audio

SCH02: Tone, T.SW, P.LED, HP, VOL, EXT.PRE Schematic

SCHEMATIC DIAGRAMS - Input, CD, Phono

SCH03: Input, CD, Phono Schematic

SCHEMATIC DIAGRAMS - SEL, FLD, P.SW, AC1, AC2, CON

SCH04: SEL, FLD, P.SW, AC1, AC2, CON Schematic

SCHEMATIC DIAGRAMS - DAC

SCH05: DAC Schematic

SCHEMATIC DIAGRAMS - Digital (1/4) - MCU

SCH06: Digital (1/4) - MCU Schematic

SCHEMATIC DIAGRAMS - Digital (2/4) - DIR

SCH07: Digital (2/4) - DIR Schematic

SCHEMATIC DIAGRAMS - Digital (3/4) - FPGA

SCH08: Digital (3/4) - FPGA Schematic

SCHEMATIC DIAGRAMS - Digital (4/4) - USB-E

SCH09: Digital (4/4) - USB-E Schematic

POWER AMP PCB ASS'Y - Component List

Power Amp Component Details

INPUT PCB ASS'Y - Component List

Input PCB Component Details

DAC PCB ASS'Y - Component List

DAC PCB Component Details

DIGITAL PCB ASS'Y - Component List

Digital PCB Component Details