DK-A10H (serv.man3) - Sharp Audio Service Manual (repair manual)

dk-a10h (serv.man3) service manual
Model
DK-A10H (serv.man3)
Pages
82
Size
13.25 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
dk-a10h-sm3.pdf
Date

Read Sharp DK-A10H (serv.man3) Service Manual online

DK-A10H/DK-A10H(BK)
 – 1
DISPLAY
PTY
ASPM
RDS
MUSIC SYSTEM FOR iPod
®
  SERVICE MANUAL
No. S3714DKA10H//
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
DK-A10H(BK)
MODEL
iPod is a registered trademark of 
Apple Computer, Inc.
PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION
[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
CHAPTER 2. ADJUSTMENTS
[1] Test 
Function............................................... 2-1
[2]  Test Mode Initial Display ............................. 2-1
[3] Key 
Test....................................................... 2-2
[4] Tuner 
Test ................................................... 2-3
[5] CD 
Test ....................................................... 2-3
[6]  Test Mode For Writing Micom Software 
(FLASH IC).................................................. 2-4
[7]  Test Mode For Writing EEPROM Patch ...... 2-4
[8] Writing 
EEPROM 
Mode .............................. 2-4
[9] User 
Reset .................................................. 2-5
[10]  All Clear (Reset).......................................... 2-5
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Disassembly ................................................ 3-1
CHAPTER 4. DIAGRAMS
[1] Block 
Diagram............................................. 4-1
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]  Chart Of Connecting Wires .........................6-2
[4] Schematic 
Diagram.....................................6-4
[5]  Wiring Side Of PWB....................................6-14
CHAPTER 7. OTHERS
[1]  Function Table Of IC ...................................7-1
[2] FL 
DISPLAY ................................................7-6
[3]  Wiring Of Primary Supply Leads 
(for U.K. only) ..............................................7-7
PARTS GUIDE
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
DK-A10H
MODEL
MUSIC SYSTEM FOR iPod
®
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
l
 
Note for users in U.K.
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Performers Protection Acts
1963 and 1972 and subsequent statutory enactments and
orders.
DK-A10H/DK-A10H(BK)
 – 2
 
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
Example:
Indicates lead-free solder of tin, silver and copper.
Lead-free wire solder for servicing
Ref No.
Description
Parts No.
PWB-A
92LPWB6717MANS
92LPWB6715CDUS
PWB-B
MAIN  (A1)/ POWER (A2)/ KEY (A3)/ SUB WOOFER LED L-CH (A4)/
SUB WOOFER LED R-CH (A5)/ CD EJECT/CD LED R-CH (A6)/
CD LED L-CH (A7)
PWB-C
92LPWB6686PODS
iPOD
CD (B1)/ DISPLAY (B2)/ MOVING MOTOR OPEN/CLOSE (B3) /
"MAIN, POWER, KEY, SUB WOOFER LED R-CH, SUB WOOFER LED L-CH, CD EJECT/CD LED R-CH,  CD 
LED L-CH, CD, DISPLAY, MOVING MOTOR OPEN/CLOSE, iPOD 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.
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 nto 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 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
DK-A10H/DK-A10H(BK)
1 – 3
CHAPTER 1. GENERAL DESCRIPTION
[1] Safety Precaution For Service Manual
DK-A10H/DK-A10H(BK)
DK-A10H/DK-A10H(BK) for U.K.
Laser Diode Properties
Material: GaAS+GaAIAs
Wavelenght: 780 nm
Emission Duration: continuous
Laser Output: max. 0.4 mW
Laser Diode Properties
Material: GaAS+GaAIAs
Wavelenght: 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.
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
WARNUNG-UNSICHTBARE LASERSTRAHLUNG WENN GERÄT
GEÖFFNET. NICHT IN DIE STRAHLUNG SCHAUEN ODER
DIREKT MIT OPTISCHEN HILFSMITTELN BETRACHTEN.
ATTENTION-RAYON LASER INVISIBLE EN CAS D'OUVERTURE.
NE PAS REGARDER LE FAISCEAU DIRECTEMENT OU AVEC DES
INSTRUMENTS OPTIQUES.
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
WARNUNG-UNSICHTBARE LASERSTRAHLUNG WENN GERÄT
GEÖFFNET. NICHT IN DIE STRAHLUNG SCHAUEN ODER
DIREKT MIT OPTISCHEN HILFSMITTELN BETRACHTEN.
ATTENTION-RAYON LASER INVISIBLE EN CAS D'OUVERTURE.
NE PAS REGARDER LE FAISCEAU DIRECTEMENT OU AVEC DES
INSTRUMENTS OPTIQUES.
1 – 1
DK-A10H/DK-A10H(BK)
1 – 4
[3] Specifications
DK-A10H/DK-A10H(BK)
[2] Important Service Notes (for U.K. only)
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 SHELL OF VIDEO
OUT SOCKET
WITHSTANDING
VOLTAGE TESTER
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
 
General
*This power consumption value is obtained when the demonstration
mode is cancelled in the power stand-by mode. 
Tuner
CD player
Power source
AC 220 - 240 V, 50 Hz
Power
consumption
Power on: 34 W
Power stand-by: 0.6 W (*)
Output power
PMPO: 64 W
Front Speaker:
MPO: 10 W (5 W + 5 W) (DIN 45 324)
RMS: 4 W (2 W + 2 W) (DIN 45 324)
RMS: 4 W (2 W + 2 W) (DIN 45 500)
Subwoofer:
MPO: 12 W (6 W + 6 W) (DIN 45 324)
RMS: 10 W (5 W + 5 W) (DIN 45 324)
RMS: 6 W (3 W + 3 W) (DIN 45 500)
Speaker
1-way type light-up speaker system
Front Speakers: 6.5 cm (2-1/2") - 12 ohms - Full 
Range
Subwoofer: 10 cm (4") - 8 ohms - Woofer
Speaker
maximum
input power
Front Speakers: 4W/ Channel
Subwoofer: 10W / Channel
Speaker rated 
input power
Front Speakers: 2W / Channel
Subwoofer: 5W / Channel
Output
terminals
Headphones: 16 - 50 ohms 
(recommended: 32 ohms)
Video output: 1Vp-p
Input
terminals
Auxiliary (audio signal): 
500 mV/47 k ohms 
Dimensions
Width: 500 mm (19-11/16") 
Height: 150 mm (5-7/8") 
Depth: 250 mm (9-7/8")
Weight
5.3 kg (11.7 lbs.)
Frequency range
FM: 87.5 - 108 MHz
AM: 522 - 1,620 kHz
Type
Single disc player
Signal readout
Non-contact, 3-beam semiconductor laser 
pickup
D/A converter
Multi bit D/A converter
Frequency
response
20 - 20,000 Hz
Dynamic range
90 dB (1 kHz)
1 – 2
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Here you can read online and download Sharp DK-A10H (serv.man3) Service Manual in PDF. DK-A10H (serv.man3) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp DK-A10H (serv.man3) 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.