Electrostatic Discharge (ESD) Precautions

The following practices minimize possible damage to ICs resulting from electrostatic discharge or improper insertion.

• Keep parts in original containers until ready for use.

• Avoid having plastic, vinyl or styrofoam in the work area.

•. Wear an anti-static wrist-strap.

• Discharge personal static before handling devices.

• Remove and insert boards with care.

• When removing boards, handle only by non-conductive surfaces and never touch open-edge connectors except at a static-free workstation.*

• Minimize handling of ICs.

• Do not slide ICs or boards over any surface.

• Insert ICs with the proper orientation, and watch for bent pins on ICs.

• Use anti-static containers for handling and transport.

*To make a plastic-laminated workbench anti-static, wash with a solution of Lux liquid detergent, and allow to dry without rinsing.

Table of Contents

1. Product Overview

Block Diagram 1-1

The Front Panel 1-2

The Rear Panel 1-3

The Remote Control 1-4

Remote Control ACCY Functions

Location Considerations 1-6

AC Connections 1-6

Wiring Considerations 1-7

Speaker Connections • Audio/Video Connections

Connection 1-8

Connecting the DC-1 as a preamp • Video Connections Digital Audio Connections • Recording a Digital Source Using the DC-1 D/A Converter

Digital Input Status Detection 1-10

RECORD/ZONE 2 Operation 1-10

Zone 2 Controls Available during Normal Operation • Zone 2 Remote Control • Exclusive Zone 2 Control

Periodic Maintenance 1-12

Ordering parts 1-12

Returning Units for Service 1-12

2. Specifications

3. Performance Verification

Quick Performance Check 3-1

Audio Performance Verification 3-3

Input to Record Output Test • Input to Zone2 Output Test Audio Output Test • Digital Input Tests • AC-3 Output Tests Video Input/Output Tests 3-8

Composite Input to Monitor Output Test • Composite Input to Record Output Test • S-Video Input to Monitor Output Test • S-Video Input to Record Output Test

4. Troubleshooting

Diagnostics 4-1

Power On Modes • Diagnostic Reporting • Diagnostics Control/ Interface • Power On Diagnostics • Extended Diagnostics

Troubleshooting 4-9

Assembly/Disassembly • User Interface Problems • Audio Problems • Video Problems • Power Supply • Battery Test Power Control Trigger Outputs • Video Subcarrier Calibration Restoring Defaults

5. Theory of Operation

Digital Theory 5-1

Digital Block Diagram • Z80 Processor • Lexichip WCS • LCD Interface • I/O Memory Map • I/O Writes • LEDs, Switches, Encoder • Z80 Serial Control • Serial Control Return Data PIC16C54 Microcontroller Subsystem • System Clocks Lexichip • DSP56004 • Reset and Battery Backup • AC-3 Upgrade

Analog, Digital Audio and Power Supply Theory 5-14

Overview • Analog Block Diagram • Analog Audio Inputs Input/Zone 2 Level Control and A/D Conversion • D/A Conversion and Output Level Control • Analog Audio Outputs • S/PDIF Digital Audio Inputs • Power Supply


Contents Cont'd. Video Module Theory 5-21

Overview • Video Block Diagram • Video Inputs • Monitor Channel DC Restorer • C Multiplexer/Amplifier • Thru Video • OSD Video Video Priority • Sync Detection • Record Channel • OSD Chip Operation • Main Board Interface Signal Names 5-29

6. Parts List

7. Schematics and Assembly Drawings

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