Hitachi HTA-DD3E User Manual

CAUTION:
Beforeservicing this chassis, itisimportantthat the servicetechnician read the“Safety
Precautions”and“ProductSafetyNotices”inthisservicemanual.
ATTENTION:
Avantd’effectuerl’entretienduchâassis,letechniciendoitlireles«Précautionsdesécurité»
etles«Noticesdesécuritéduproduit»présentésdansleprésentmanuel.
VORSICHT:
VorÖffnendesGehäuseshatderService-Ingenieurdie„Sicherheitshinweise“und„Hinweise
zurProduktsicherheit“indiesemWartungshandbuchzulesen.
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
Data contained within this Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manueld’entretienpeuventfairel’objet
demodificationsenvuedeperfectionner
leproduit.
Die in diesem Wartungshandbuch
enthaltenenSpezifikationenkönnensich
zwecksVerbesserungenändern.
September 2000
AV SURROUND SYSTEM
HTA-DD3E
HTA-DD3EBS
HTA-DD3W
HTA-DD3WUN
HTA-DD3WAU
SM0103
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
CONTENTS
SPECIFICATIONS...............................................................................................................................................3
SERVICE POINTS..............................................................................................................................................4
WIRING DIAGRAM.............................................................................................................................................9
PRINTED WIRING BOARD..............................................................................................................................10
SCHEMATIC DIAGRAM....................................................................................................................................25
EXPLODED VIEW.............................................................................................................................................43
REPLACEMENT PARTS LIST..........................................................................................................................47
ADJUSTMENT.....................................................................................................................................................8
BLOCK DIAGRAM.............................................................................................................................................23

Hitachi HTA-DD3E Specifications

General

Frequency Response	40 Hz - 20 kHz
Sensitivity	85 dB
RMS output power	30 W
Speaker Type	Subwoofer
Driver Units	13cm Subwoofer

Summary

Safety Precautions

All Products Safety Guidelines

General safety guidelines applicable to all HITACHI products before servicing.

Picture Tube Safety Hazards

Critical safety warnings and handling procedures for high-voltage picture tubes.

Laser Beam Exposure Warning

Precautions against direct exposure to laser beams when the product is in use.

Insulation Resistance Testing

Specifications Overview

Audio Section Specifications

Detailed technical specifications for the audio amplifier section.

Video Section Specifications

Technical specifications for the composite and component video inputs/outputs.

Tuner Section Specifications

Specifications for FM and AM radio reception capabilities.

General Unit Specifications

Service Points and Disassembly

Internal PWB Removal Steps

Steps for safely removing various Printed Wiring Boards (PWBs) from the chassis.

Transformer and Power PWB Removal

Main PWB and Heat Sink Removal

Adjustments Procedures

FM Discriminator Adjustment

Procedure for adjusting the FM discriminator circuit for optimal performance.

Tuning Level Adjustment

Wiring Diagram

Overall Wiring Schematic

Detailed wiring diagram illustrating internal connections of the AV surround system.

Printed Wiring Boards Layouts

Main PWB Layout

Component layout and soldering side view of the main PWB.

Tuner PWB Layout

Audio PWB Layout

FL, Power, and Digital PWBs Layout

DSP PWB Layout

Block Diagram

System Block Diagram

Overview of the AV surround system's functional blocks and signal flow.

Replacement Parts List

Capacitors Parts List

Comprehensive list of replacement capacitor part numbers and descriptions.

Resistors Parts List

Detailed list of replacement resistor part numbers and specifications.

Transistors Parts List

ICs and Diodes Parts List

Fuses, Coils, Switches Parts List