SD-EX220H
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications.................................................1-1
[2] Names of parts ..............................................1-2
CHAPTER 2. ADJUSTMENTS
[1] Adjustment.....................................................2-1
[2] To Check and Cancel Protect Circuit Detection
Line ................................................................2-1
[3] Test mode ......................................................2-2
CHAPTER 3. MECHANISM BLOCKS
[1] Disassembly .................................................3-1
[2] Removing and reinstalling the main parts .....3-3
CHAPTER 4. DIAGRAMS
[1] Block diagram ................................................4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Notes on schematic diagram .........................5-1
[2] Types of transistor and LED .......................... 5-1
[3] Description of circuit for 1-bit unit (See the wiring
diagrams on pages 6-16 and 6-17) ............... 5-2
[4] Waveforms of 1-bit circuit.............................. 5-2
[5] Waveforms of CD circuit................................ 5-3
[6] Voltage .......................................................... 5-4
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Wiring side of P.W.Board/schematic diagram 6-1
CHAPTER 7. OPERATION FLOWCHART
[1] Troubleshooting............................................. 7-1
CHAPTER 8. OTHER
[1] Function table of IC ....................................... 8-1
Parts Guide
SERVICE MANUAL
No. S7367SDEX220H
1-BIT DIGITAL AUDIO SYSTEM
SD-EX220H
MODEL
SHARP CORPORATION
CONTENTS
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SD-EX220H 1-Bit Digital Audio System consisting of
SD-EX220H (main unit) and CP-EX220H (speaker system).
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
