XL-UR250H (serv.man3) — Sharp Audio Service Manual (repair manual)

Model
XL-UR250H (serv.man3)
Pages
118
Size
16.95 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
xl-ur250h-sm3.pdf
Date

View Sharp XL-UR250H (serv.man3) Service Manual online

XL-UR250H
 – 1
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION
[1]  Safety Precaution For Service Manual ........ 1-1
[2] Specifications............................................... 1-2
[3] Names 
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
[4]  CD Changer Mechanism Section ................ 2-5
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Removing 
And 
Reinstalling The Main Parts
..................................................................... 3-1
[2] Disassembly ................................................ 3-2
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. S2710XLUR250H
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-UR250H Micro Component System consisting of 
XL-UR250H (main unit) and CP-UR250H (speaker system).
• 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.
XL-UR250H
SHARP CORPORATION
XL-UR250H
 – 2
Audio
XL-MP150
Service Manual
XLMP150
Market
E
 
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
3. Soldering
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper. 
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Ref No.
Description
Parts No.
PWB-A
PWB-B
PWB-C
92LPWB6658MANS
92LPWB6658DPLS
92LPWB6658CDUS
MAIN (A1), POWER (A2), SPEAKER (A3), RE-FLASH (A4)
DISPLAY (B1), USB (B2), JACK (B3), LED (B4), SUB (B5)
CD MP3
PWB-D
QPWBF1055AWZZ
CD CHANGER MOTOR (PWB ONLY)
The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals.The alphabetical 
character following LF shows the type of lead-free solder.
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with 
conventional lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40  C, were 
commend you to use a dedicated soldring bit,if you are not familiar with how to obtain lead-free wire solder or 
soldering bit,contact our service station or service branch in your area. 
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220  C which is higher than the conventional lead 
solder by 40  C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the 
PWB for extended period of time. However, since the land may be peeled off or the maximum heat-resistance 
temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady 
soldering condition. 
Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on 
and off the power of the bit as required. 
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit 
after every use of it.
"MAIN, POWER, SPEAKER, RE-FLASH, DISPLAY, USB, JACK, LED, SUB, CD MP3, CD CHANGER (PWB 
ONLY)" of this model employs lead-free solder.
i
XL-UR250H
1 – 3
CHAPTER 1. GENERAL DESCRIPTION
[1] Safety Precaution For Service Manual
Laser Diode Properties
Material: GaAs + GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.4 mW
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
This product is classified as a CLASS 1 LASER PRODUCT.
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHEN THE CABINET IS REMOVED,THE POWER IS TURNED ON WITHOUT A COMPACT DISC IN POSITION AND THE
PICKUP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICKUP LENS.
2-THE LASER POWER OUTPUT OF THE PICKUP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRESET BEFORE SHIPMENT.
DO NOT ATTEMPT TO READJUST THE LASER PICKUP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICKUP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
1 – 1
XL-UR250H
1 – 4
[2] Specifications
General
Power source
AC 230 V, 50 Hz
Power
consumption
Power on: 90 W                                                   
Power stand-by: 0.6 W(*)
Dimensions
Width: 175 mm (6-3/4") 
Height: 240 mm (9-1/2") 
Depth: 315 mm (12-1/5")
Weight
5.4 kg (11.7 lbs.)
 ( * )This power consumption value is obtained when the demonstration 
mode is cancelled in the power stand-by mode. 
Amplifier
Output power
PMPO: 660 W
MPO: 330 W (165 W + 165 W) (DIN 45 324)
RMS: 160 W (80 W + 80 W) (DIN 45 324)
RMS: 128 W (64 W + 64 W) (DIN 45 500)
Output terminals
Speakers: 6 ohms
Headphones: 16 - 50 ohms 
(recommended: 32 ohms)
Subwoofer pre-out (audio signal): 
200 mV/10 k ohms at 70 Hz
Input terminals
Video/Auxiliary (audio signal): 
500 mV/47 k ohms
CD player
Tuner
Type
5-disc multi-play compact disc player
Signal readout
Non-contact, 3-beam semiconductor laser 
pickup
D/A converter
D/A Multi-bit converter
Frequency response 20 - 20,000 Hz
Dynamic range
90 dB (1 kHz)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Support preset 
memory
40 presets (AM and FM).
USB
USB host 
interface
Complies with USB 1.1 (Full Speed)/ 2.0 
Mass-Storage-Class.
Supports Bulk only and CBI protocol.
Support file
MPEG 1 Layer 3
MPEG 2/2.5 Layer 3
WMA (Non DRM)
Bitrate support
MP3 (32 ~ 320 kbps)
WMA (64 ~ 160 kbps)
Other
Maximum total number of MP3/WMA files 
is 65 535.
Maximum total number of folders is 512 
INCLUSIVE of root directory. (Folders with
non playable files are also counted.)
The ID3TAG information supported are 
TITLE, ARTIST and ALBUM only.
Supports ID3TAG version 1 and version 2.
Maximum number of folders that can be 
recorded is 128.
Maximum number of files in a folder that 
can be recorded is 128.
File  system 
support
Supports USB devices with Microsoft 
Windows/DOS/FAT 12/ FAT16/ FAT 32.
2 kbyte block length for sector.
Speaker
Type
2-way type speaker system
5 cm (2") tweeter
12 cm (4-3/4") woofer
Maximum input power
160 W
Rated input power
80 W
Impedance
6 ohms
Dimensions
Width: 148 mm (5-13/16") 
Height: 260 mm (10-1/4") 
Depth: 224 mm (8-13/16")
Weight
2.7 kg (6.0 lbs.)/each
1 – 2
Page of 118
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Here you can view online or download Sharp XL-UR250H (serv.man3) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp XL-UR250H (serv.man3) System. Information contained in Sharp XL-UR250H (serv.man3) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).