KEF PSW3500 User Manual

SERVICE MANUAL
CONTENTS
SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
PARTS LIST:
LED INDICATORS PCB ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SWITCHED MODE PSU CIRCUIT PCB ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
PRE AMP & POWER AMP PCB ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-12
CASING SMPS ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
SPEAKER ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-16
PACKING ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-22
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-25
EXPLODED VIEW DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-28
POWERED SUBWOOFER
Date: Jan.17, 2005
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KEF PSW3500 Specifications

Audio Specifications

LF Drive Unit	300 mm
crossover frequency	40 Hz - 140 Hz
frequency range	30 Hz - 250 Hz

Power

amplifier power	300 Watts
maximum output (SPL)	110 dB
magnetic shielding	Yes

Weight and Dimensions

weight	22.5 kg
dimensions	450 x 600 x 395 mm

Summary

Specification

PSW3500 Speaker Specifications

Detailed specifications for the PSW3500 speaker unit, including frequency response and sensitivity.

PSW3500 System Specifications

Frequency Response Curve

Parts List

LED Indicators PCB Assembly

Switched Mode PSU Circuit PCB Assembly

Component list for the Switched-Mode Power Supply (SMPS) circuit PCB.

Pre Amp & Power Amp PCB Assembly

Component list for the Pre-Amplifier and Power Amplifier PCB assemblies.

Speaker Assembly

Block Diagram

System Block Diagram

Schematic Diagrams

Pre Amp Schematic

Detailed schematic diagram of the pre-amplifier section.

Power Amp Schematic

Detailed schematic diagram of the power amplifier section.

SMPS Schematic

Detailed schematic diagram of the Switched-Mode Power Supply (SMPS).

MCU Schematic