XL-DK257N
– 1
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
A
U
D
I
O
IN
iPod is a registered trademark of Apple Inc.
PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION
[1] Important Service Safety Precaution ................ 1-1
[2] Important Service Notes (for U.S.A only).......... 1-1
[3] Specifications..................................................... 1-2
[4] Name Of Parts ................................................... 1-3
CHAPTER 2. ADJUSTMENTS
[1] CD Section .................................................. 2-1
[2] Test Mode .................................................... 2-2
[3] Standard Specification Of Stereo System
Error Message Display Contents ................. 2-4
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Disassembly ................................................ 3-1
CHAPTER 4. BLOCK DIAGRAM
[1] Block Diagram ............................................. 4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Waveforms Of Servo Circuit ........................ 5-1
[2] IC Voltage .................................................... 5-3
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Notes On Schematic Diagram ..................... 6-1
[2] Types Of Transistor And LED ...................... 6-1
[3] Schematic Diagram ..................................... 6-2
[4] Charts Of Connecting Wires ...................... 6-10
[5] Wiring Side of PWB ................................... 6-12
CHAPTER 7. FLOWCHART
[1] Troubleshooting ........................................... 7-1
CHAPTER 8. OTHER
[1] Function Table Of IC .................................... 8-1
[2] FL Display.................................................... 8-9
PARTS GUIDE
SERVICE MANUAL
No. S2807XLDK257N
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.
CONTENTS
!
MICRO COMPONENT SYSTEM
MODEL
XL-DK257N Micro Component System consisting of
XL-DK257N (main unit) and CP-DK257N (speaker system).
XL-DK257N
• In the interests of user-safety (Required by safety regulations in
some countries) the set should be restored to its original condition
and only parts identical to those specified be used.
SHARP CORPORATION
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