Samsung DVD-S325B, DVD-S224, DVD-S224B, DVD-S225, DVD-S225B Service Manual
...
DVD PLAYER
Chassis : Sellino
(M-Micom/AV-Decoder ; ZORAN)
DVD-S224/S224B
DVD-S225/S225B
DVD-S324/S324B/S324W
DVD-S325/S325B
SERVICE
1. Precautions
2. Disassembly and Reassembly
3. T
roubleshooting
4. Exploded Views and Parts List
5. Electrical Parts List
6. Block Diagrams
7. PCB Diagrams
8. Wiring Diagrams
9. Schematic Diagrams
Manual
DVD PLAYER CONTENTS
SERVICE MANUAL DVD-S224/S225/S324/S325
DVD-S224/S224B
DVD-S225/S225B
DVD-S324/S324B/S324W
DVD-S325/S325B
OPEN/CLOSE
JOG/SHUTTLE
OPEN/CLOSE
OPEN/CLOSE
STOP SKIPSTART/PUSES
OPEN/CLOSE
JOG/SHUTTLE
ELECTRONICS
© Samsung Electronics Co., Ltd. MAY. 2002
Printed in Korea
AK82-00211A
Samsung Electronics 1-1
1. Precautions
1-1 Safety Precautions
1) Before returning an instrument to the customer,
always make a safety check of the entire instrument,
including, but not limited to, the following items:
(1) Be sure that no built-in protective devices are
defective or have been defeated during servicing.
(1)Protective shields are provided to protect both
the technician and the customer. Correctly replace
all missing protective shields, including any
remove for servicing convenience.
(2)When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place
all protective devices, including, but not limited to,
nonmetallic control knobs, insulating fish papers,
adjustment and compartment covers/shields, and
isolation resistor/capacitor networks. Do not operate this instrument or permit it to be operated without all protective devices correctly installed and
functioning.
(2) Be sure that there are no cabinet openings through
which adults or children might be able to insert
their fingers and contact a hazardous voltage. Such
openings include, but are not limited to, excessively wide cabinet ventilation slots, and an improperly fitted and/or incorrectly secured cabinet back
cover.
(3) Leakage Current Hot Check-With the instrument
completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use a isolation transformer during this test.) Use a leakage
current tester or a metering system that complies
with American National Standards institute (ANSI)
C101.1 Leakage Current for Appliances and
Underwriters Laboratories (UL) 1270 (40.7). With
the instrument’s AC switch first in the ON position
and then in the OFF position, measure from a
known earth ground (metal water pipe, conduit,
etc.) to all exposed metal parts of the instrument
(antennas, handle brackets, metal cabinets, screwheads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis.
Any current measured must not exceed 0.5mA.
Reverse the instrument power cord plug in the outlet and repeat the test. See Fig. 1-1.
Any measurements not within the limits specified
herein indicate a potential shock hazard that must
be eliminated before returning the instrument to
the customer.
Fig. 1-1 AC Leakage Test
(4) Insulation Resistance Test Cold Check-(1) Unplug
the power supply cord and connect a jumper wire
between the two prongs of the plug. (2) Turn on the
power switch of the instrument. (3) Measure the
resistance with an ohmmeter between the
jumpered AC plug and all exposed metallic cabinet
parts on the instrument, such as screwheads,
antenna, control shafts, handle brackets, etc. When
an exposed metallic part has a return path to the
chassis, the reading should be between 1 and 5.2
megohm. When there is no return path to the chassis, the reading must be infinite. If the reading is
not within the limits specified, there is the possibility of a shock hazard, and the instrument must be
re-pared and rechecked before it is returned to the
customer. See Fig. 1-2.
Fig. 1-2 Insulation Resistance Test
DEVICE
UNDER
TEST
(READING SHOULD
NOT BE ABOVE
0.5mA)
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
TEST ALL
EXPOSED METER
SURFACES
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
2-WIRE CORD
Antenna
Terminal
Exposed
Melal Part
ohm
ohmmeter
Precautions
1-2 Samsung Electronics
2) Read and comply with all caution and safety related notes non or inside the cabinet, or on the chassis.
3) Design Alteration Warning-Do not alter of add to
the mechanical or electrical design of this instrument. Design alterations and additions, including
but not limited to, circuit modifications and the
addition of items such as auxiliary audio output
connections, might alter the safety characteristics of
this instrument and create a hazard to the user. Any
design alterations or additions will make you, the
service, responsible for personal injury or property
damage resulting therefrom.
4) Observe original lead dress. Take extra care to
assure correct lead dress in the following areas:
(1) near sharp edges, (2) near thermally hot parts (be
sure that leads and components do not touch thermally hot parts), (3) the AC supply, (4) high voltage,
and (5) antenna wiring. Always inspect in all areas
for pinched, out-of-place, or frayed wiring, Do not
change spacing between a component and the
printed-circuit board. Check the AC power cord for
damage.
5) Components, parts, and/or wiring that appear to
have overheated or that are otherwise damaged
should be replaced with components, parts and/ or
wiring that meet original specifications.
Additionally, determine the cause of overheating
and/or damage and, if necessary, take corrective
action to remove any potential safety hazard.
6) Product Safety Notice-Some electrical and mechanical parts have special safety-related characteristics
which are often not evident from visual inspection,
nor can the protection they give necessarily be
obtained by replacing them with components rated
for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by shading,
an ( )or a ( )on schematics and parts lists. Use
of a substitute replacement that does not have the
same safety characteristics as the recommended
replacement part might created shock, fire and/or
other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.
Precautions
Samsung Electronics 1-3
1-2 Servicing Precautions
CAUTION : Before servicing Instruments covered
by this service manual and its supplements, read and
follow the Safety Precautions section of this manual.
Note : If unforseen circument create conflict between
the following servicing precautions and any of the
safety precautions, always follow the safety precautions. Remember: Safety First.
1-2-1 General Servicing Precautions
(1) a. Always unplug the instrument’s AC power cord
from the AC power source before (1) re-moving
or reinstalling any component, circuit board,
module or any other instrument assembly, (2)
disconnecting any instrument electrical plug or
other electrical connection, (3) connecting a test
substitute in parallel with an electrolytic capacitor in the instrument.
b. Do not defeat any plug/socket B+ voltage inter-
locks with which instruments covered by this
service manual might be equipped.
c. Do not apply AC power to this instrument and
/or any of its electrical assemblies unless all
solid-state device heat sinks are correctly installed.
d. Always connect a test instrument’s ground lead
to the instrument chassis ground before connecting the test instrument positive lead. Always
remove the test instrument ground lead last.
Note : Refer to the Safety Precautions section ground
lead last.
(2) The service precautions are indicated or printed on
the cabinet, chassis or components. When servicing, follow the printed or indicated service precautions and service materials.
(3) The components used in the unit have a specified
flame resistance and dielectric strength.
When replacing components, use components
which have the same ratings. Components i-entified by shading, by( ) or by ( ) in the circuit diagram are important for safety or for the characteristics of the unit. Always replace them with the exact
replacement components.
(4) An insulation tube or tape is sometimes used and
some components are raised above the printed
wiring board for safety. The internal wiring is
sometimes clamped to prevent contact with heating components. Install such elements as they
were.
(5) After servicing, always check that the removed
screws, components, and wiring have been installed correctly and that the portion around the
serviced part has not been damaged and so on.
Further, check the insulation between the blades of
the attachment plug and accessible conductive
parts.
1-2-2 Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet
and turn the power ON. Connect the insulation resistance meter (500V) to the blades of the attachment
plug. The insulation resistance between each blade of
the attachment plug and accessible conductive
parts(see note) should be more than 1 Megohm.
Note : Accessible conductive parts include metal panels, input terminals, earphone jacks, etc.
Precautions
1-4 Samsung Electronics
1-3 ESD Precautions
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity.
Such components commonly are called Electrostatically Sensitive Devices(ESD). Examples of typical ESD
devices are integrated circuits and some field-effect
transistors and semiconductor chip components. The
following techniques should be used to help reduce
the incidence of component damage caused by static
electricity.
(1) Immediately before handling any semiconductor
component or semiconductor-equipped assembly,
drain off any electrostatic charge on your body by
touching a known earth ground. Alternatively,
obtain and wear a commercially available discharging wrist strap device, which should be
removed for potential shock reasons prior to applying power to the unit under test.
(2) After removing an electrical assembly equipped
with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
(3) Use only a grounded-tip soldering iron to solder or
unsolder ESD devices.
(4) Use only an anti-static solder removal devices.
Some solder removal devices not classified as
“anti-static” can generate electrical charges sufficient to damage ESD devices.
(5) Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage
ESD devices.
(6) Do not remove a replacement ESD device from its
protective package until immediately before your
are ready to install it.(Most replacement ESD
devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or
comparable conductive materials).
(7) Immediately before removing the protective ma-
terials from the leads of a replacement ESD device,
touch the protective material to the chassis or circuit assembly into which the device will be
installed.
CAUTION : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
(8) Minimize bodily motions when handling unpack-
aged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your
clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient
to damage an ESD device).
Precautions
Samsung Electronics 1-5
1-4 Handling the optical pick-up
The laser diode in the optical pick up may suffer electrostatic breakdown because of potential static electricity from clothing and your body.
The following method is recommended.
(1) Place a conductive sheet on the work bench (The
black sheet used for wrapping repair parts.)
(2) Place the set on the conductive sheet so that the
chassis is grounded to the sheet.
(3) Place your hands on the conductive sheet(This
gives them the same ground as the sheet.)
(4) Remove the optical pick up block
(5) Perform work on top of the conductive sheet. Be
careful not to let your clothes or any other static
sources to touch the unit.
◆ Be sure to put on a wrist strap grounded to the
sheet.
◆ Be sure to lay a conductive sheet made of copper etc.
Which is grounded to the table.
Fig.1-3
(6) Short the short terminal on the PCB, which is in-
side the Pick-Up ASS’Y, before replacing the PickUp. (The short terminal is shorted when the PickUp Ass’y is being lifted or moved.)
(7) After replacing the Pick-up, open the short termi-
nal on the PCB.
THE UNIT
WRIST-STRAP
FOR GROUNDING
1M
1M
CONDUCTIVE SHEET
Precautions
1-6 Samsung Electronics
1-5 Pick-up disassembly and reassembly
1-5-1 Disassembly
1) Remove the power cord.
2) Disassemble the Deck-Assy.
3) Make solder land 2 points short on Pick-up.
(See Fig. 1-4)
4) Disassembly the Pick-up.
1-5-2 Assembly
1) Replace the Pick-up.
2) Remove the soldering 2 points on Pick-up.
3) Reassemble the Deck-Assy.
SOLDER LAND 2 POINTS SHORT
PICK-UP ASS'Y
Note : If the assembly and disassembly are not done in correct sequence, the Pick-up may be damaged.
Fig. 1-4
Samsung Electronics
2-1
2. Disassembly and Reassembly
2-1 Cabinet and PCB
2-1-1 Top Cabinet Removal
1) Remove 3 Screws Πon the back Top Cabinet.
2) Lift up the Top Cabinet in direction of arrow.
Π3 SCREWS
Fig. 2-1 Top Cabinet Removal
Note : Reassembly in reverse order.
2-2
Samsung Electronics
Disassembly and Reaasembly
2-1-2 Door-Tray Removal
1) Supply power and open Tray Œ.
2) Disassemble the Door-Tray ´ in direction of arrow “A”.
3) Close Tray Πand power off.
Note : If Tray Œ doesn’t open, insert a Screw driver ¨ into the Emergency hole ˇ (as shown in detailed draw-
ing) and then push it in the direction of arrow “B”. Open Tray manually.
<Side View>
ˇ EMERGENCY HOLE
¨ SCREW DRIVER
"B"
ΠTRAY
´ DOOR-TRAY
"A"
Fig. 2-2 Door-Tray Removal
Disassembly and Reaasembly
Samsung Electronics
2-3
ΠKNOB-VOLUME
ˆ 2 HOOKS
´ 2 HOOKS
Ø ASS'Y FRONT-CABINET
’ KEY PCB
” 5 SCREWS
∏ KNOB-JOG
¨ 1 HOOK
ˇ 1 HOOK
Fig. 2-3 Ass’y Front-Cabinet Removal (DVD-S224/S224B/S225/S225B)
2-1-3 Ass’y Front-Cabinet Removal
<DVD-S224/S224B/S225/S225B>
1) Release 6 Hooks Œ, ´, ˇ, ¨ and remove Ass’y Front-Cabinet ˆ.
<DVD-S324/S324B/S324W/S325/S325B>
1) Remove Knob-Volume Œ.
2) Release 6 Hooks ´, ˇ, ¨, ˆ and remove Ass’y Front-Cabinet Ø.
3) Remove Knob-Jog ∏, 5 Screws ”, and Key PCB ’.
Fig. 2-4 Ass’y Front-Cabinet Removal (DVD-S324/S324B/S324W/S325/S325B)
¨ 2 HOOKS
Π2 HOOKS
ˆ ASS'Y FRONT-CABINET
ˇ 1 HOOK
´ 1 HOOK
2-4
Samsung Electronics
Disassembly and Reaasembly
DECK-ASS'Y
Π3 SCREWS
FLAT-CABLE
CONNECT-WIRE
DCN1
DCN2
DCN3
MAIN PCB
2-1-4 Ass’y Deck Removal
1) Disconnect Flat-Cable,Connect-Wire from DCN1, DCN2 and DCN3 on Main PCB.
2) Remove 3 Screws Œ from the Ass’y Deck and lift it up.
Fig. 2-5 Ass’y Deck Removal
Disassembly and Reaasembly
Samsung Electronics
2-5
´ 2 SCREWS
ˇ JACK PCB
ˆ MAIN PCB
¨ 4 SCREWS
Π2 SCREWS
1 SCREW
1 SCART JACK
Fig. 2-6 Main PCB, Jack PCB Removal
2-1-5 Main PCB, Jack PCB Removal
1) Remove 2 Screws Œ. (1 Scart Jack ; 1 Screw)
2) Remove 2 Screws ´ and lift up the Jack PCB ˇ.
3) Remove 4 Screws ¨ and lift up the Main PCB ˆ.
2-6
Samsung Electronics
Disassembly and Reaasembly
DVD-S224/S224B/S225/S225B
DVD-S324/S324B/S324W/S325/S325B
JACK PCB
MAIN PCB
JACK PCB
MAIN PCB
KEY PCB
2-2 PCB Location
Fig. 2-7 PCB Location
Disassembly and Reaasembly
Samsung Electronics
2-7
NO. CONNECTOR NO. DIRECTION CONNECTOR NO. NO.
Œ FLAT-CABLE DECK ASS'Y MAIN PCB DCN1 ´
ˇ FLAT-CABLE DECK ASS'Y MAIN PCB DCN2 ¨
ˆ
CONNECT-WIRE
(HCN1) HOUSING PCB JACK PCB DCN3 Ø
∏ CN8 MAIN PCB JACK PCB CN1 ”
’ PCN1 MAIN PCB JACK PCB PCNS1 ˝
CT1
CT2
CT3
CT4
CT5
Œ
ˇ
ˆ
CT1
CT3
CT2
DECK-ASS'Y
JACK PCB
MAIN PCB
´
¨
Ø
∏
’
˝
”
CT4
CT5
DVD-S224/S224B/S225/S225B
2-3 Connector Diagram
Fig. 2-8 Connector Diagram
2-8
Samsung Electronics
Disassembly and Reaasembly
NO. CONNECTOR NO. DIRECTION CONNECTOR NO. NO.
Œ FLAT-CABLE DECK ASS'Y MAIN PCB DCN1 ´
ˇ FLAT-CABLE DECK ASS'Y MAIN PCB DCN2 ¨
ˆ
CONNECT-WIRE
(HCN1) HOUSING PCB JACK PCB DCN3 Ø
∏ CN8 MAIN PCB JACK PCB CN1 ”
’ PCN1 MAIN PCB JACK PCB PCNS1 ˝
Ô CN3 JACK PCB KEY PCB KCN1
CT1
CT2
CT3
CT4
CT5
CT5
Œ
ˇ
ˆ
CT1
CT3
CT2
DECK-ASS'Y
KEY PCB
CT6
JACK PCB
MAIN PCB
´
¨
Ø
∏
’
˝
Ô
”
CT4
CT5
DVD-S324/S324B/S324W/S325/S325B
Fig. 2-9 Connector Diagram
Disassembly and Reaasembly
Samsung Electronics
2-9
2-4 Deck
2-4-1 Tray Disc Removal
1) Insert a Screw Driver Œ into Emergency Hole ´ and push the Slider Housing ˇ in the direction arrow “A”.
2) When the Tray Disc ¨ comes out a little, pull it in the direction arrow “B” by hand.
3) Pull the Tray Disc ¨ to disassemble , while simultaneously pushing 2 Stoppers ˆ (left, right) in the direction
arrow “C”, “D”.
Fig. 2-10 Tray Disc Removal
"A"
ΠSCREW DRIVER
´ EMERGENCY HOLE
ˇ SLIDER HOUSING
¨ TRAY DISC
"B"
"C"
ˆ STOPPER
ˆ STOPPER
"D"
2-10
Samsung Electronics
Disassembly and Reaasembly
2-4-2 Assy P/U Deck Removal
1) Disconnect DCN2 Œ, DCN3 ´.
2) Lift down the Assy P/U Deck ˇ while simultaneously pushing 2 Hooks ¨, ˆ in the direction of arrow
“A”, “B”.
Fig. 2-11 Assy P/U Deck Removal
ΠDCN2
ˆ HOOK
¨ HOOK
´ DCN3
ˇ ASSY- P/U DECK
"A"
"B"
<Assembly Point>
SLIDER HOUSING
Disassembly and Reaasembly
Samsung Electronics
2-11
2-4-3 Housing Ass’y Removal
1) Remove Belt Œ.
2) Push the Hook ´ in the direction arrow “A” and lift up Pulley Gear ˇ.
3) Push the Slider Housing ˆ in the direction arrow “B” and lift up the Gear Tray ¨.
4) Lift up the Slider Housing ˆ.
5) Remove the soldering Ø of 2 points (Red, Black).
6) Remove 2 Screws ∏ and lift down the Motor Load Assy ”.
7) Push the 3 Hooks ’ bottom side in the direction arrow “C” and lift up the Housing PCB ˝.
8) Push the Hooks Ô and remove Deck PCB .
Fig. 2-12 Housing Ass’y Removal
ΠBELT
ˇ PULLEY GEAR
¨ GEAR TRAY
” MOTOR LOAD ASSY
’ 3 HOOKS
˝ HOUSING PCB
Ô HOOK
Ø SOLDERING
∏ 2 SCREWS
ˆ SLIDER HOUSING
´ HOOK
"A"
"B"
<Bottom Side>
"C"
"C"
"C"
2-12
Samsung Electronics
Disassembly and Reaasembly
2-4-4 Sub Chassis Removal
1) Remove the Soldering of Motor Feed (+, - wire) Œ.
2) Remove the 4 Screws ´.
3) Lift up the Ass’y Brkt Deck ˇ.
Fig. 2-13 Sub Chassis Removal
´ 4 SCREWS
ˇ ASSY-BRAK DECK
ΠSOLDERING OF
MOTOR FEED (+, - WIRE)
+
Disassembly and Reaasembly
Samsung Electronics
2-13
2-4-5 Ass’y Brkt Deck Removal
1) Remove Washer Œ.
2) Remove Gear Feed B ´ , Gear Feed Aˇ.
3) Remove 2 Screws ¨.
4) Remove Shaft Pick-Up ˆ and Pick-Up Assy Ø.
5) Remove 1 Screw ∏.
6) Remove 2 Screws ”.
7) Remove 3 Spring Spindle ’ and Motor Spindle Ass’y ˝.
Fig. 2-14 Ass’y Brkt Deck Removal
¨ 2 SCREW
ΠWASHER
´ GEAR FEED B
” 2 SCREWS
∏ 1 SCREW
ˆ SHAFT PICK-UP
ˇ GEAR FEED A
Ø PICK-UP ASS'Y
’ SPRING SPINDLE
˝ MOTOR SPINDLE
2-14
Samsung Electronics
Disassembly and Reaasembly
MEMO
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