DOWNLOAD Sharp XL-UH240H (serv.man4) Service Manual ↓ Size: 12.64 MB | Pages: 124 in PDF or view online for FREE

XL-UH240H

 – 1

[1]  SAFETY PRECAUTION FOR SERVICE 

MANUAL ..................................................... 1-1

[2]  IMPORTANT SERVICE NOTES (FOR U.K. 

ONLY).......................................................... 1-2

[3]  SPECIFICATIONS....................................... 1-2

[4]  NAMES OF PARTS ......................................1-4

[1]  CD SECTION .............................................. 2-1

[2]  TEST MODE................................................ 2-2

[3]  STANDARD SPECIFICATION OF

STEREO SYSTEM ...................................... 2-4

[4]  CD CHANGER MECHANISM SECTION .... 2-5

[1]  REMOVING AND REINSTALLING THE MAIN 

PARTS..........................................................3-1

[2]  DISASSEMBLY ............................................3-3

[1]  BLOCK DIAGRAM.......................................4-1

[1]  WAVEFORMS OF SERVO CIRCUIT ..........5-1

[2]  VOLTAGE ....................................................5-3

[1]  NOTES ON SCHEMATIC DIAGRAM ...........6-1

[2]  TYPES OF TRANSISTOR AND LED ...........6-1

[3]  WIRING SIDE OF PWB/SCHEMATIC 

DIAGRAM.....................................................6-2

[1]  TROUBLESHOOTING..................................7-1

[1]  FUNCTION TABLE OF IC ............................8-1

[2]  FL DISPLAY................................................8-10

[3]  WIRING OF PRIMARY SUPPLY LEADS 

(FOR U.K. ONLY) .......................................8-11

No. S3608XLUH240H

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

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.

• Note for users in U.K.

Recording and playback of any material may require con-

sent which SHARP is unable to give. Please refer particu-

larly to the provisions of Copyright Act 1956, the Dramatic

and Musical Performers Protection Act 1956, the Perform-

ers Protection Acts 1963 and 1972 and to any subsequent

statutory enactments and orders. 

• In the interests of user-safety (Required by safety regula-

tions in some countries) the set should be restored  to  its

original condition and only parts identical to those specified

be used.

XL-UH240H

 – 2

Example:

Indicates lead-free solder of tin, silver and copper.

Lead-free wire solder for servicing

PWB-A

92LPWB6477MANS

92LPWB6475CDUS

PWB-C

MAIN (A1), POWER (A2), SPEAKER (A3)

PWB-B

92LPWB6483DPLS

DISPLAY (B1), USB (B2), JACK (B3), LED (B4), SUB (B5)

CD MP3

PWB-D

QPWBF0027AWZZ

CD MOTOR (PWB ONLY)

PWB-E

QPWBF1055AWZZ

CD CHANGER (PWB ONLY)

"MAIN,DISPLAY,SPEAKER, DISPLAY, USB, JACK, LED, SUB, CD MP3, CD MOTOR (PWB ONLY), 
CD CHANGER (PWB ONLY)" of this model employs lead-free solder.
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, we recommend 
you to use a dedicated soldering 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 of for 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.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sand paper.
Be careful when replacing parts with polarity indication on the PWB silk.

i

XL-UH240H

1 – 3

Laser Diode Properties
Material: GaAIAs
Wavelenght: 795m
Emission Duration: continuous
Laser Output: max. 0.6 mW

Laser Diode Properties
Material: GaAIAs
Wavelenght: 795m
Emission Duration: continuous
Laser Output: max. 0.6 mW

THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
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

1 – 1

XL-UH240H

1 – 4

Before returning the unit to the customer after completion of a repair or
adjustment it is necessary for the following withstand voltage test to be
applied to ensure the unit is safe for the customer to use.

Setting of Withstanding Voltage Tester and set.

Set name

set value

Withstanding Voltage Tester
Test voltage

4,240 VPEAK
3,000 VRMS

Set time

6 secs

Set current (Cutoff current)

4 mA

Unit
Judgment
OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzer sounds.

PROBE

AC

OUT

UNIT

SHORT-CIRCUIT
AC POWER
SUPPLY CORD

CONNECT THE PROBE
TO GND OF CHASSIS
SCREW

WITHSTANDING

VOLTAGE TESTER

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.

AC 230V, 50 Hz

Power on: 90W
Power stand-by: 0.6W(*)

Width: 175mm (6-3/4")
Height: 240mm (9-1/2")
Depth: 315 mm (12-1/5")

5.4 kg (12 lbs.)

( * )This power consumption value is obtained when the demonstra-

tion mode is cancelled in the power stand-by mode.

PMPO: 660W
MPO: 330W (165W + 165W) (DIN45 324)
RMS: 160W (80W + 80W) (DIN45 324)
RMS: 128W (64W + 64W) (DIN45 500)

Speakers: 6 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Subwoofer pre-out (audio signal):
200 mV/10k ohms at 70Hz

Video/Auxiliary (audio signal):
500 mV/47k ohms

5-disc multi-play compact disc player

Non-contact, 3-beam semiconductor laser
pickup

1-bit D/A converter

20 - 20,000 Hz

90 dB (1 kHz)

FM: 87.5 - 108 MHz

AM: 522 - 1,620 kHz

Mass storage class

MP3/WMA (do not support DRM file)

FAT 16 or FAT 32

MP3 (32 ~ 320 kbps)
WMA (64 ~ 160 kbps)

MP3 ID3 - tag only supports version 1.X
USB supports version 2.0

2-way type speaker system
5cm (2") tweeter
13cm (5-1/8") woofer

80W

6 ohms

Width: 185mm (7-1/4")
Height: 260mm (10-1/4")
Depth: 230mm (9-1/16")

2.8kg (6.1 lbs.)/each

160W

1 – 2