XL-MP8H (serv.man4) - Sharp Audio Service Manual (repair manual)

xl-mp8h (serv.man4) service manual
Model
XL-MP8H (serv.man4)
Pages
69
Size
2.71 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
xl-mp8h-sm4.pdf
Date

Read Sharp XL-MP8H (serv.man4) Service Manual online

 
SERVICE MANUAL
XL-MP8H
No. XXXXXXXXXXXXX
MICRO COMPONENT SYSTEM
XL-MP8H
MODEL
SHARP CORPORATION
CONTENTS
CHAPTER 1. GENERAL DESCRIPTION
[1]  PRECAUTION FOR USING LEAD-FREE 
SOLDER ........................................................ 1-1
[2]  SAFETY PRECAUTION FOR SERVICE 
MANUAL ........................................................ 1-2
[3] SPECIFICATIONS ......................................... 1-3
[4] NAMES 
OF 
PARTS........................................ 1-4
CHAPTER 2. ADJUSTMENTS
[1] ADJUSTMENT ............................................... 2-1
[2] TEST 
MODE .................................................. 2-2
CHAPTER 3. MECHANICAL DESCRIPTION
[1]  REMOVING AND REINSTALLING THE 
MAIN PARTS ................................................. 3-1
[2] DISASSEMBLY .............................................. 3-2
CHAPTER 4. DIAGRAMS
[1] BLOCK 
DIAGRAM 
MAIN ............................... 4-1
[2] BLOCK 
DIAGRAM 
DISPLAY ......................... 4-3
CHAPTER 5. CIRCUIT DESCRIPTION
[1]  WAVEFORMS OF CD CIRCUIT .................... 5-1
[2] VOLTAGE....................................................... 5-2
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 
MAIN(1/3) ..............6-2
[4] SCHEMATIC 
DIAGRAM 
MAIN(2/3) ..............6-4
[5] SCHEMATIC 
DIAGRAM 
MAIN(3/3) ..............6-6
[6] SCHEMATIC 
DIAGRAM 
DISPLAY ................6-8
[7]  WIRING SIDE OF PWB ..............................6-10
[8]  WIRING SIDE OF PWB MAIN TOP ............6-12
[9]  WIRING SIDE OF PWB MAIN BOTTOM......6-14
[10]  WIRING SIDE OF PWB POWER/JACK......6-16
[11]  WIRING SIDE OF PWB DISPLAY/
SWITCH ......................................................6-18
CHAPTER 7. FLOWCHART
[1] TROUBLESHOOTING ..................................7-1
CHAPTER 8. OTHERS
[1]  FUNCTION TABLE OF IC .............................8-1
[2] FL 
DISPLAY ..................................................8-7
Parts Guide
XL-MP8H Micro Component System consisting of XL-MP8H
(main unit) and CP-MP8H (speaker system).

 
In the interests of user-safety the set should be restored to its origi-
nal condition and only parts identical to those specified be used.
XL-MP8H
1 – 1
Home Stereo
XL-MP8H
Service Manual
XLMP8H S/M
Market
E
 
CHAPTER 1. 
GENERAL DESCRIPTION
[1] PRECAUTION 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
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.
3. Soldering
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.
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
DCEKKV558SJ03
"
MAIN,JACK,SENSOR,SWITCH,DISPLAY,POWER
PWB" 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.
MAIN(A1)/JACK(A2)/Sensor(A3)/SWITCH(A4)/DISPLAY(A5)/POWER(A6)
XL-MP8H
1 – 2
[2] SAFETY PRECAUTION FOR SERVICE MANUAL
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class 1 Requirements. However, the follow-
ing precautions must be observed during servicing to protect your eyes against exposure to the Laser beam.
1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than the lead-in posi-
tion, 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 inside the unit and replacement service parts have already been adjusted prior to shipping.
3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.
4) Under no circumstances look directly into the Pickup Lens at any time.
5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous radiation
exposure. 
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ
KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA
A L T I S T A A K Ä Y T T Ä J Ä N T U R V A L L I S U U S L U O K A N 1
YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.
VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN
I D E N N A B R U K S A N V I S N I N G S P E C I F I C E R A S . K A N
A N V Ä N D A R E N U T S Ä T T A S F Ö R O S Y N L I G L A S E R -
S T R Å L N I N G , S O M Ö V E R S K R I D E R G R Ä N S E N F Ö R
L A S E R K L A S S 1 .
ADVARSEL-USYNLIG LASERSTRÅLING VED ÅBNING. SE IKKE IND I
STRÅLEN-HELLER IKKE MED OPTISKE INSTRUMENTER.
VARO! AVATTAESSA OLET ALTTIINA NÄKYMÄTÖN LASERSÄTEILYLLE.
ÄLÄ TUIJOTA SÄTEESEEN ÄLÄKÄ KATSO SITÄ OPTISEN LAITTEEN
LÄPI.
VARNING-OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD.
STIRRA EJ IN I STRÅLEN OCH BETRAKTA EJ STRÅLEN GENOM
OPTISKT INSTRUMENT.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
XL-MP8H
1 – 3
[3] SPECIFICATIONS
General
Amplifier
Tuner
CD player
Speaker
Power source
AC 230 V, 50 Hz
Power
consumption
Power on: 25 W
Power stand-by: 0.9 W
Dimensions
Width: 100 mm (3-15/16")
Height: 205 mm (8-1/16")
Depth: 240 mm (9-7/16")
Weight
2.1 kg (4.6 lbs.)
Output power
PMPO: 30 W (total)
MPO: 15 W (7.5 W + 7.5 W) (DIN 45 324)
RMS: 10 W (5 W + 5 W) (DIN 45 324)
Output terminals
Speakers: 4 ohms
Headphones: 16 - 50 ohms
(recommended: 32 ohms)
Line output: 2 k ohms
Input terminals
Line input: 47 k ohms
Frequency range
FM: 87.5 - 108.0 MHz
AM: 522 - 1,620 kHz
Type
Compact disc player
Signal readout
Non-contact, 3-beam semiconductor laser
pickup
D/A converter
1-bit D/A converter
Frequency
response
20 - 20,000 Hz
Dynamic range
90 dB (1 kHz)
Type
8 cm (3-1/8") full-range speaker
Maximum input
power
10 W
Rated input power
5 W
Impedance
4 ohms
Dimensions
Width: 100 mm (3-15/16")
Height: 205 mm (8-1/16")
Depth: 193 mm (7-5/8")
Weight
1.2 kg (2.6 lbs.)/each
Specifications for this model are subject to change without prior
notice.
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Here you can read online and download Sharp XL-MP8H (serv.man4) Service Manual in PDF. XL-MP8H (serv.man4) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp XL-MP8H (serv.man4) System. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.