Samsung SW248 Users Manual
• Specifications
• Cautions at Service
• External Part Name
• Necessary equipments and Specifications in needing
Service(P/U replacement)
• Exploded Views & Part List
• Packing Options
• Block Diagram
• Troubleshooting
• Circuit Diagram
• Main Components Block Diagram & Pin Descriptions
• Electrical Parts List
The design and part of this product is subject to change without prior notice for performance improvement.
CONTENTS
SERVICE
Manual
SW-248B
CD-R/RW DRIVE
1
1. General Specifications
- Drive type : Computer built-in
- Power consumption : DC +5V, 1.5A
DC +12V, 1.5A
- Dimensions : 146mm (W)X42mm (H)X184mm (L)
- Net Weight : 750g
2. Electrical Features
- Interface : ATAPI BUS(IDE)
-
Data transfer rate :
Write(CD-R) : 600KBytes/Sec(4X)
1,200KBytes/Sec(8X)
1,800KBytes/Sec(12X)
2,400KBytes/Sec(16X)
3,000KBytes/Sec(20X)
3,600KBytes/Sec(24X)
4,200KBytes/Sec(28X)
4,800KBytes/Sec(32X)
Write(CD-RW) : 600KBytes/Sec(4X)
Write(High Speed CD-RW) : 600KBytes/Sec(4X)
1,500KBytes/Sec(10X)
Resd(MAX) : 2,000~6,000KBytes/Sec(CAV 40X)
- Access time : 110ms (Random. TYPICAL)
- Buffer Capacity : 8Mbyte
- Error ratio : Mode 1: Below 10
-12
Mode 2: Below 10
-9
- Frequency response : 20Hz~20kHz (Lineout)
100Hz~20kHz (H/P out)
- Signal to noise ratio : 70dB(1kHz, Lineout)
- Distortion factor : 0.15% Less than(1KHz)
- Channel separation : 65dB(1kHz, Lineout)
55dB(1kHz, H/P out)
- Used laser : Semiconductor laser
- Audio Output : Line out 0.75 ±20%(Vrms), 47KΩ
H/P out 0.65 ±20%(Vrms), 33Ω
1. General Items
1) Be careful not to have your eyes or a part of body touch withlaser diode at repair because this product uses laser diode.
2) Do not disassemble Pick-up at repair. If the laser diode is
bad, replace the entire Pick-up.
3) Keep away from TV or other electrical units at repair to
prevent influence from surrounding units.
4) If you replace the parts during repair, be sure to unplug the
power cable before replacement.
5) If you insert a disc into the drive, be sure to load it corectly.
6) Because this unit can't be used by itself, surely mount it
on PC (586 DMA support) and check the operations in
use of private device driver floppy diskette.
Refer to Instruction manual.
7) This unit has many parts with features related to safety and
especially, for essential parts, the importance is indicated on
circuit diagram and part list.
Be certain to use the parts with same specifications at
replaing these parts.
2.
Earthing cautions at handling Pick-up
- Because the laser diode in optical Pick-up is subject
to get out of order due to the potential difference occurring
by electricity load charged in clothes or bodies, observe the
following earthing items at handling.
1) Body earthing(hand) : Be sure to wear a wrist strip
with one side earthed.(Impedance : Below 104).
It removes the electricity formed in body.
2) Work table earthing : Put the earthed conductive plate
(Impedance : Below 104) such as copper plate on work
table.
3) Cautions for clothes : Do not have any clothes touch with
Pick-up because the electricity formed in clothes is
destroyed easily.
Specifications
Cautions at Service
2
Electricity sensing device
Safety instructions
Some semiconductor units may be damaged easily by
electricity.
These elements are called as electricity sensing
device(ESD) in general. For example, integrated circuit,
field effect transister, semiconductor chip.
The following methods have to be used to reduce the
accident of element damage generated by electricity.
1) Emit all electric charges in your body through contact
with earthing materail at once before handling a
semiconductor factor or device including it.
In other way, make use of commercial wristlet against
electricity
It shall be detached before power impression to the
unit on testing because of shock.
2) After detaching an electrical device including ESD, it
shall be placed on conductive surface such as
aluminium to prevent the charge acummulation and
unit exposure.
3) Utilize only the soldering iron with earthed end for
ESD soldering or release
4) Make use of only anti-static soldering release unit.
A soldering release unit not to be classified as
antistatic may generate the enough charge to damage
ESD unit.
5) Never use a Freon-propelling chemical product.
It may generate the enough charge to damage ESD.
6) Untill installing ESD unit for replacement, never it from
protection package.
(Most of ESD unit for replacement have lead
composed of package shorted electrically by
conductive foam, aluminium or similar conductive
material.)
7) Contact with shassis including ESD or protection
material in circuit parts just before detaching the
protection material from lead of ESD unit for replacement
8) Minimize the body action at handling an unpacked
ESD unit for replacement.
(Otherwise, an unconscious action, so to speak,
friction between clothes or foot lifting from carpet floor
may generate the enough charge to damage ESD
unit.)
Note : Be sure to avoid the power impression to the
shassis or circuit and observe the safety instruction.
1) Read all safety and operational manuals before
operating this product
2) Keep the safety and operational manuals for future
reference.
3) Observe all precations and operational instructions in
or on the surface of this product.
4) Follow all operation and maintenance cautions.
5) Be sure to plug off the power cable before cleaning.
Use a dry cloth to clean a dusty cover of cabinet
instead of liquid or aersol cleaner.
6) Never use a attachment not to be recommended by
this company. It may result in danger and damage.
7) Never use this product around water such as
bathtub, washbasin, laundry machine, swimming pool
or lakeside.
8) Never place this product on bed, sofa or around
radiator and heater.
9) Power : Utilize the only power displayed on lebel
If the power type can't be checked, call to dealer or
Korea Electricity, Co, Ltd. Refer tooperate this product
by battery or other power.
10) Lightning : Plug off the power cable for product
protection during thunder and lightning flashes or this
product is unused for a long time.
11) Overload : Be careful that the wall outlet and
expanded cord is overloaded due to danger of fire
and electrical shock.
12) Never insert a substance or liquid into this product.
It may cause fire or shorck by contact with voltage
point or short.
13) Part replacement : The service engineer has to use
the parts of same specification at replacement.
Otherwire, fire, shock or other dangers may be
occurred.
14) Safety check : Be sure to perform the safety check
at service or repair completion
Importance : This product includes special impotrant
parts on safety.
These parts are indicated by on schematic
diagram.
At replacement of these parts, use the
parts of same specification due to shock,
fire or other dangers.
Never transform the original design without
permission of this company.
3
1. Front
2. Rear
Digital
output terminal
(Optional)
Sound
output terminal
Master/Slave
select pin
Interface
terminal
Power terminal
External Part Name
Earphhone jack
Stop/Open
button
Emergency
HOLE
Up/Down
Volume
LEDDisc tray
4
Disassembly Diagram
5
Device Part List
PART NAME CODE No SPECFICATION
ASSY DECK BG97-02248A -
BG60-00009A 1.SCREW TITE M1.7*5(10)
LOADING BG97-02250A 1.ASSY LOADING -
BG61-00203A 1.MAIN FRAME HIPS(HG1760S)
BG66-00061A 2.GEAR TRAY POM(F20-03)
BG66-00032A 3.GEAR PULLEY POM(F20-03)
BG66-00044A 4.BELT PULLEY CR-70(BLK 1.3t)
BG97-00789A 5.ASSY LOADING M/T BG31-00027A - LOADING MOTOR RF-300CH-11440 ¿Ü
BG66-00033A - PULLEY MOTOR POM(F20-03)
BG66-00034A 6.LEVER EJECT POM(F20-03)
BG66-00062A 7.SLIDE CAM KOCETAL(K700)
TRAY DISC BG66-00060A 1.TRAY DISC ABS ( SR-0320D )
FEEDING BG97-02251A 1.ASSY FEEDING -
BG61-00078A 1.SUB CHASSIS ABS(GF20%)
BG73-00012A 2.RUBBER-INSULATOR BUTHYL 25Hs
BG73-00027A 3.RUBBER-INSULATOR BUTHYL 25Hs
BG61-00238A 4.MAIN BASE M SECC+POM
BG61-00237A - MAIN BASE P SECC 2.0T
BG31-00025A 5.ASSY STEP M/T “SPS-15RF-054K, P4.5mm”
BG61-00180A 6.GUIDE PU POM(NW-02)
BG61-00122A 7.SHAFT PU R “SUS420J2,¥õ3.0,L85.5mm”
BG31-00036A 8.MOTOR SPINDLE “RSM-2615A,DMBSPC75A”
- FFC-SPM 15 PIN
BG97-02247A 9. ASSY TURN TABLE BG59-00017A TURN TABLE ABS ADC12
BG63-00084A COVER T/T ABS SN PLATE T0.6
BG59-00018A TURN TABLE BALL “STEEL ¥Õ2.5,11EA”
BG73-00026A RUBBER-T/T ABS CR(NEO-B-6150)
BG59-00019A MAGNET T1.5
BG61-00018A BRKT-T/T SECC T1.0
BG30-00025A 10.PICK-UP SW-232B
BG41-00184A 11.EFFC PU “32 PIN (P0.5),88mm”
BG97-01729A 12.ASSY SLIDER STEP BG66-00052A - SLIDE STEP POM(NW-02)
BG61-00225A - SPRING STEP SUS 304-WPB
BG61-20031A 13.HOLDER CAM POM(M90-44)
AH60-10145A 14.SCREW TITE M1.7*5(5.5)
AC60-10074A 15.SCREW TITE M2.6*6
6001-001348 16.SCREW M1.7*3.5
6003-001260 17.SCREW TITE M1.7*4.0*3.5
BG69-00127A 18.PAD-DECK PORON LE-20 2T
BG73-00022A 19.RUBBER-DVA SILICON 25µµ
BG61-00178A 20.PLA-VIB/ABSORBER SECC 2T
ETC 3409-001138 -.SWITCH DETECTOR
BG63-00052A -.SHEET PU PVC FILM 0.85T
BG41-00182A -.FFC MAIN 13 PIN
- -.OIL EP-100
- -.GREASE KG-110
- -.GREASE G-754
6
Disassembly and assembly
Door-tray
Exterior and PCB disassembly
Figure - Door-tray
1) Supply power to open the tray¶Êin direction of arrow “A”
2) Lift up the door¶Â in direction of arrow “B”
3) Close the tray¶Êand power off.
Reference : If the tray¶Êdoesn't open, push the clip3 into specified hole shown in detailed figure to open
it compulsorily.
7
Disassembly and assembly
Panel-front
Exterior and PCB disassembly
1) Remove 6 hooks¶Â
2) Take out the panel-front¶Êforward.
Figure - Panel-front
Loading...