Sharp SM-SX100 User Manual

SM-SX100
– 1 –
SM-SX100
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
SERVICE MANUAL
SHARP CORPORATION
No. S3021SMSX100/
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CONTENTS
Page
IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY)........................................................................................................2
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) ...........................................................................................................2
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 3
OPERATION MANUAL ...................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................. 7
ADJUSTMENT ................................................................................................................................................................. 10
INTRODUCTION OF CIRCUIT OUTLINE ....................................................................................................................... 12
EXPLANATION OF 1-BIT UNIT ....................................................................................................................................... 18
WIRING PROCESS DIAGRAM ....................................................................................................................................... 21
BLOCK DIAGRAM ........................................................................................................................................................... 24
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 26
TYPE OF TRANSISTOR AND DIODE............................................................................................................................. 26
SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD ............................................................................................... 27
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 50
TROUBLESHOOTING ..................................................................................................................................................... 51
FUNCTION TABLE OF IC................................................................................................................................................ 55
PARTS GUIDE/EXPLODED VIEW/PACKING METHOD (FOR U. K. ONLY)/PACKING OF THE SET (FOR U.S.A. ONLY)

Sharp SM-SX100 Specifications

General

Brand	Sharp
Model	SM-SX100
Category	Amplifier
Language	English

Summary

Important Service Notes

For U.S.A. Only

Safety checks and leakage current test for US models.

For U.K. Only

Withstand voltage test for UK models.

Specifications

Rear Panel Connections

Disassembly and Maintenance

Disassembly Steps and Hardware

Lists removal steps, screws, and associated figures.

Adjustment Procedures

1-Bit PWB Adjustment

Method for adjusting the 1-bit PWB, including offset voltage.

Adjustment Verification

Delta-Sigma Modulation

7th Order Delta-Sigma Circuit

1-Bit Amplifier Application

Block Diagram and Operation

1-Bit Amplifier Features

1-Bit Unit Circuit Explanations

Protection and Detection Circuits

Wiring Process Diagrams

System Block Diagrams

Part 1

Overall block diagram of the 1-bit amplifier system.

Part 2

Detailed block diagram of the 1-bit amplifier system.

Schematic Diagram (1/9)

Schematic Diagram (2/9)

Schematic Diagram (3/9)

Schematic Diagram (4/9)

Schematic Diagram (5/9)

Schematic Diagram (6/9)

Schematic Diagram (8/14)

Schematic Diagram (9/14)

Wiring Diagrams (1/14)

Wiring Diagrams (3/14)

Wiring Diagrams (4/14)

Wiring Diagrams (5/14)

Wiring Diagrams (6/14)

Wiring Diagrams (7/14)

Wiring Diagrams (8/14)

Wiring Diagrams (9/14)

Wiring Diagrams (10/14)

Wiring Diagrams (11/14)

Wiring Diagrams (12/14)

Wiring Diagrams (13/14)

Wiring Diagrams (14/14)

Troubleshooting Guide

Power Supply Issues

Diagnosing problems when power is not supplied.

Sound Output Issues

Diagnosing issues when no sound is produced.

Analog Input Sound Issues

Troubleshooting no sound from analog inputs.

Digital Input Sound Issues

Troubleshooting no sound from digital inputs.

1-Bit Amplifying Section Checks

Diagnosing issues when signal is output but no sound.

1-Bit Amplifier Power/Protector Issues

Troubleshooting power troubles and protector activation in the 1-bit amplifier.