Samsung SP403av User manual

LCD PROJECTION TELEVISION
Chassis : PLT51A
Model: SP403JHAX
LCD PROJECTION TELEVISION CONTENTS
Precautions
Reference Information
Specifications
Disassembly and Reassembly
Alignment and Adjustments
Troubleshooting
Exploded View and Parts List
Electric Parts List
Block Diagram
PCB Layout Diagram
Wiring Diagram
Schematic Diagrams
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

ELECTRONICS
©Samsung Electronics Co., Ltd. JAN.1999
Printed in Korea
3PLT51A-0318

1. Precautions
1-1 Safety Precautions
1. Be sure that all of the built-in protective
devices are replaced. Restore any missing
protective shields.
2. When reinstalling the chassis and its
assemblies, be sure to restore all protective
devices, including: nonmetallic control knobs
and compartment covers.
3. Make sure that there are no cabinet openings
through which peopleÑparticularly
childrenÑmight insert fingers and contact
dangerous voltages. Such openings include
the spacing between the picture tube and the
cabinet mask, excessively wide cabinet
ventilation slots, and improperly fitted back
covers.
If the measured resistance is less than 1.0
megohm or greater than 5.2 megohms, an
abnormality exists that must be corrected
before the unit is returned to the customer.
4. Leakage Current Hot Check (Figure 1-1):
Warning: Do not use an isolation
transformer during this test. Use a leakage-
current tester or a metering system that
complies with American National Standards
Institute (ANIS C101.1, Leakage Current for
Appliances), and Underwriters Laboratories
(UL Publication UL1410, 59.7).
5. With the unit completely reassembled, plug
the AC line cord directly into the power
outlet. With the unitÕs AC switch first in the
ON position and then OFF, measure the
current between a known earth ground (metal
water pipe, conduit, etc.) and all exposed
metal parts, including: antennas, handle
brackets, metal cabinets, screwheads and
control shafts. The current measured should
not exceed 0.5 milliamp. Reverse the power-
plug prongs in the AC outlet and repeat the
test.
Fig. 1-1 AC Leakage Test
6. Antenna Cold Check:
With the unitÕs AC plug disconnected from the
AC source, connect an electrical jumper across
the two AC prongs. Connect one lead of the
ohmmeter to an AC prong. Connect the other
lead to the coaxial connector.
7. X-ray Limits:
The picture tube is especially designed to pro-
hibit X-ray emissions. To ensure continued
X-ray protection, replace the picture tube only
with one that is the same type as the original.
Carefully reinstall the picture tube shields and
mounting hardware; these also provide X-ray
protection.
8. High Voltage Limits:
High voltage must be measured each time ser-
vicing is done on the B+, horizontal deflection
or high voltage circuits. Correct operation of
the X-ray protection circuits must be
reconfirmed whenever they are serviced.
(X-ray protection circuits also may be called
Òhorizontal disableÓ or Òhold-downÓ.)
Heed the high voltage limits. These include
the XÐray Protection Specifications Label, and
the Product Safety and X-ray Warning Note on
the service data schematic.
Precautions
Samsung Electronics 1-1
LEAKAGE
CURRENT
TESTER
DEVICE
UNDER
TEST TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
GROUND
(READING SHOULD
NOT BE ABOVE
0.5mA)
Follow these safety, servicing and ESD precautions to prevent damage and protect against potential
hazards such as electrical shock and X-rays.

1-1 Safety Precautions (Continued)
9. High voltage is maintained within specified
limits by close-tolerance, safety-related
components and adjustments. If the high
voltage exceeds the specified limits, check
each of the special components.
10. Design Alteration Warning:
Never alter or add to the mechanical or
electrical design of this unit. Example: Do not
add auxiliary audio or video connectors. Such
alterations might create a safety hazard. Also,
any design changes or additions will void the
manufacturerÕs warranty.
11. Hot Chassis Warning:
Some TV receiver chassis are electrically
connected directly to one conductor of the AC
power cord. If an isolation transformer is not
used, these units may be safely serviced only
if the AC power plug is inserted so that the
chassis is connected to the ground side of the
AC source.
To confirm that the AC power plug is inserted
correctly, do the following: Using an AC
voltmeter, measure the voltage between the
chassis and a known earth ground. If the
reading is greater than 1.0V, remove the AC
power plug, reverse its polarity and reinsert.
Re-measure the voltage between the chassis
and ground.
12. Some TV chassis are designed to operate with
85 volts AC between chassis and ground,
regardless of the AC plug polarity. These units
can be safely serviced only if an isolation
transformer inserted between the receiver and
the power source.
13. Some TV chassis have a secondary ground
system in addition to the main chassis ground.
This secondary ground system is not
isolated from the AC power line. The two
ground systems are electrically separated by
insulating material that must not be defeated
or altered.
14. Components, parts and wiring that appear to
have overheated or that are otherwise
damaged should be replaced with parts that
meet the original specifications. Always
determine the cause of damage or overheat-
ing, and correct any potential hazards.
15. Observe the original lead dress, especially
near the following areas: Antenna wiring,
sharp edges, and especially the AC and high
voltage power supplies. Always inspect for
pinched, out-of-place, or frayed wiring. Do
not change the spacing between components
and the printed circuit board. Check the AC
power cord for damage. Make sure that leads
and components do not touch thermally hot
parts.
16. Picture Tube Implosion Warning:
The picture tube in this receiver employs
Òintegral implosionÓ protection. To ensure
continued implosion protection, make sure
that the replacement picture tube is the same
as the original.
17. Do not remove, install or handle the picture
tube without first putting on shatterproof
goggles equipped with side shields. Never
handle the picture tube by its neck. Some
Òin-lineÓ picture tubes are equipped with a
permanently attached deflection yoke; do not
try to remove such Òpermanently attachedÓ
yokes from the picture tube.
18. Product Safety Notice:
Some electrical and mechanical parts have
special safety-related characteristics which
might not be obvious from visual inspection.
These safety features and the protection they
give might be lost if the replacement compo-
nent differs from the originalÑeven if the
replacement is rated for higher voltage,
wattage, etc.
Components that are critical for safety are
indicated in the circuit diagram by shading,
( ) or ( ).
Use replacement components that have the
same ratings, especially for flame resistance
and dielectric strength specifications.
A replacement part that does not have the
same safety characteristics as the original
might create shock, fire or other hazards.
Precautions
1-2 Samsung Electronics
!

1-2 Servicing Precautions
1. Servicing precautions are printed on the
cabinet. Follow them.
2. Always unplug the unitÕs AC power cord from
the AC power source before attempting to: (a)
Remove or reinstall any component or
assembly, (b) Disconnect an electrical plug or
connector, (c) Connect a test component in
parallel with an electrolytic capacitor.
3. Some components are raised above the printed
circuit board for safety. An insulation tube or
tape is sometimes used. The internal wiring is
sometimes clamped to prevent contact with
thermally hot components. Reinstall all such
elements to their original position.
4. After servicing, always check that the screws,
components and wiring have been correctly
reinstalled. Make sure that the portion around
the serviced part has not been damaged.
5. Check the insulation between the blades of the
AC plug and accessible conductive parts
(examples: metal panels, input terminals and
earphone jacks).
6. Insulation Checking Procedure: Disconnect the
power cord from the AC source and turn the
power switch ON. Connect an insulation
resistance meter (500V) to the blades of the AC
plug.
The insulation resistance between each blade
of the AC plug and accessible conductive parts
(see above) should be greater than 1 megohm.
7. Never defeat any of the B+ voltage interlocks.
Do not apply AC power to the unit (or any of
its assemblies) unless all solid-state heat sinks
are correctly installed.
8. Always connect a test instrumentÕs ground
lead to the instrument chassis ground before
connecting the positive lead; always remove
the instrumentÕs ground lead last.
9. When some parts inside the optical engine
(except lamp) are damaged, replace the whole
optical engine.
Precautions
Samsung Electronics 1-3
Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between
the servicing and safety precautions, always follow the safety precautions.
Warning2: An electrolytic capacitor installed with the wrong polarity might explode.

1. Some semiconductor (Òsolid stateÓ) devices
are easily damaged by static electricity. Such
components are called Electrostatically
Sensitive Devices (ESDs); examples include
integrated circuits and some field-effect
transistors. The following techniques will
reduce the occurrence of component damage
caused by static electricity.
2. Immediately before handling any semicon
ductor components or assemblies, drain the
electrostatic charge from your body by
touching a known earth ground. Alternatively,
wear a discharging wrist-strap device. (Be
sure to remove it prior to applying powerÑ
this is an electric shock precaution.)
3. After removing an ESD-equipped assembly,
place it on a conductive surface such as
aluminum foil to prevent accumulation of
electrostatic charge.
4. Do not use freon-propelled chemicals. These
can generate electrical charges that damage
ESDs.
5. Use only a grounded-tip soldering iron when
soldering or unsoldering ESDs.
6. Use only an anti-static solder removal device.
Many solder removal devices are not rated as
Òanti-staticÓ; these can accumulate sufficient
electrical charge to damage ESDs.
7. Do not remove a replacement ESD from its
protective package until you are ready to
install it. Most replacement ESDs are
packaged with leads that are electrically
shorted together by conductive foam,
aluminum foil or other conductive materials.
8. Immediately before removing the protective
material from the leads of a replacement ESD,
touch the protective material to the chassis or
circuit assembly into which the device will be
installed.
9. Minimize body motions when handling
unpackaged replacement ESDs. Motions such
as brushing clothes together, or lifting a foot
from a carpeted floor can generate enough
static electricity to damage an ESD.
Precautions
1-4 Samsung Electronics
1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

Reference Information
Samsung Electronics 2-1
2. Reference Information
2-1 Tables of Abbreviations and Acronyms
A
Ah
Å
dB
dBm
°C
°F
°K
F
G
GHz
g
H
Hz
h
ips
kWh
kg
kHz
kΩ
km
km/h
kV
kVA
kW
I
MHz
Ampere
Ampere-hour
Angstrom
Decibel
Decibel Referenced to One
Milliwatt
Degree Celsius
Degree Fahrenheit
degree Kelvin
Farad
Gauss
Gigahertz
Gram
Henry
Hertz
Hour
Inches Per Second
Kilowatt-hour
Kilogram
Kilohertz
Kilohm
Kilometer
Kilometer Per Hour
Kilovolt
Kilovolt-ampere
Kilowatt
Liter
Megahertz
MV
MW
MΩ
m
µA
µF
µH
µm
µs
µW
mA
mg
mH
mI
mm
ms
mV
nF
Ω
pF
Ib
rpm
rps
s
V
VA
W
Wh
Megavolt
Megawatt
Megohm
Meter
Microampere
Microfarad
Microhenry
Micrometer
Microsecond
Microwatt
Milliampere
Milligram
Millihenry
Milliliter
Millimeter
Millisecond
Millivolt
Nanofarad
Ohm
Picofarad
Pound
Revolutions Per Minute
Revolutions Per Second
Second (Time)
Volt
Volt-ampere
Watt
Watt-hour
Table 2-1 Abbreviations

Reference Information
2-2 Samsung Electronics
Table 2-1 Abbreviations
ABL
AC
ACC
AF
AFC
AFT
AGC
AM
ANSI
APC
APC
A/V
AVC
BAL
BPF
B-Y
CATV
CB
CCD
CCTV
Ch
CRT
CW
DC
DVM
EIA
ESD
ESD
FBP
FBT
FF
FM
FS
GND
G-Y
H
HF
HI-FI
IC
IC
IF
Automatic Brightness Limiter
Alternating Current
Automatic Chroma Control
Audio Frequency
Automatic Frequency Control
Automatic Fine Tuning
Automatic Gain Control
Amplitude Modulation
American National Standards Institute
Automatic Phase Control
Automatic Picture Control
Audio-Video
Automatic Volume Control
Balance
Bandpass Filter
Blue-Y
Community Antenna Television (Cable TV)
Citizens Band
Charge Coupled Device
Closed Circuit Television
Channel
Cathode Ray Tube
Continuous Wave
Direct Current
Digital Volt Meter
Electronics Industries Association
Electrostatic Discharge
Electrostatically Sensitive Device
Feedback Pulse
Flyback Transformer
Flip-Flop
Frequency Modulation
Fail Safe
Ground
Green-Y
High
High-Frequency
High Fidelity
Inductance-Capacitance
Integrated Circuit
Intermediate Frequency
I/O
L
L
LED
LF
MOSFET
MTS
NAB
NEC
NTSC
OSD
PCB
PLL
PWM
QIF
R
RC
RF
R-Y
SAP
SAW
SIF
SMPS
S/N
SW
TP
TTL
TV
UHF
UL
UV
VCD
VCO
VCXO
VHF
VIF
VR
VTR
VTVM
TR
Input/output
Left
Low
Light Emitting Diode
Low Frequency
Metal-Oxide-Semiconductor-Field-Effect-Tr
Multi-channel Television Sound
National Association of Broadcasters
National Electric Code
National Television Systems Committee
On Screen Display
Printed Circuit Board
Phase-Locked Loop
Pulse Width Modulation
Quadrature Intermediate Frequency
Right
Resistor & Capacitor
Radio Frequency
Red-Y
Second Audio Program
Surface Acoustic Wave(Filter)
Sound Intermediate Frequency
Switching Mode Power Supply
Signal/Noise
Switch
Test Point
Transistor Transistor Logic
Television
Ultra High Frequency
Underwriters Laboratories
Ultraviolet
Variable-Capacitance Diode
Voltage Controlled Oscillator
Voltage Controlled Crystal Oscillator
Very High Frequency
Video Intermediate Frequency
Variable Resistor
Video Tape Recorder
Vacuum Tube Voltmeter
Transistor

Reference Information
Samsung Electronics 2-3
2-2 IC Line Up
Table 2 - 2 IC Line - Up
BLOCK
MAIN
AV-TERMINAL
SOUND
MICOM
LCD-CONTROL
FEATURE-BOX
SPECIFICATION
TDA9810T
TDA7265
PCF8574P
SAA1300
TDA6920X
TEA5114A
TL062CDT
MSP3410D
DPL3519A
TL062CDT
74HC4052
SDA30C264
ST24W16
TMS27C040
SDA5273P
KM44C1004D
HD74HC123P
74HC04D
TDA4780
TDA8444
CXA1853Q
CXA2504N
CXD2443Q
CIP3215A
VPC3210A
TL7705AC
SDA9280
SDA9272
SDA9253
74F125
74F541
FUNCTION
VIF (QSS-IF&AM)
STEREO AMP (25W)
FAN,LEVER S/W,THERMO S/W DETECT
LED CONTROL, LAMP ON/OFF
7*5 VIDEO S/W
VIDEO S/W
OP AMP
SOUND PROCESSOR
DOLBY PRO LOGIC
OP AMP
ANALOG-MULTIPLEXER
8-BIT MICRO CONTROLLER
EEPROM (2K*8)
PROGRAMMABLE ROM
MEGATEXT
DRAM (1M*4BIT)
MULTIVIBRATOR
CMOS-LOGIC
RGB CONTROL
DAC
RGB DRIVER
SAMPLE/HOLD DRIVER
TIMING GENERATOR
COMPONENT INTERFACE PROCESSOR
VIDEO PROCESSOR
POWER-ON RESET GENERATOR
DISPLAY PROCESSOR
VIDEO INTERPOLATION PROCESSOR
DRAM
BUFFER
BUFFER
MAKER
PHILLIPS
SGS-THOMSON
PHILIPS
PHILIPS
SIEMENS
SGS-THOMSON
T.I
ITT
ITT
T.I
PHILIPS
SIEMENS
SGS-THOMSON
T.I
SIEMENS
SEC
HITACHI
PHILIPS
PHILIPS
PHILIPS
SONY
SONY
SONY
ITT
ITT
T.I
SIEMENS
SIEMENS
SIEMENS
PHILIPS
PHILIPS

2-4 Samsung Electronics
MEMO

Specifications
Samsung Electronics 3-1
3. Specifications
CONSUMPTION
REQUIREMENTS
FREQUENCY
SIZE
TYPE
EXT4
BACK (3 SCARTS)
MAIN
CHARACTERISTICS
SYSTEM
SP-403JHA
168 W
Right : 13W
Left : 13W
POWER
LCD
Frequency Synthesizer
PAL, SECAM, NTSC (only AV mode)
NICAM, A2 STEREO, AM
75W, Coaxial Cable
Main Voltage : 230V
Input Range : 220 ~240V
50Hz
1.43" , 16:9
p-Si : Active matrix TFT
100
VHF : 2 ~ 12, UHF : 21 ~ 69, Cable : S1 ~ S41
-1 RCA Input / 1 S-Video input
-Headphone Audio Output
-EXT1 : full RGB Scart / AV-LINK
-EXT2 : Scart (Output Selectable)
-EXT3 : Decoder (Output Selectable)
-Dolby Prologic Signal Output (RCA Jack)
Specifications are subject to change.
MODEL
ANTENNA INPUT
NUMBER OF CHANNELS
TUNING RANGE
SOUND OUTPUT
SOCKETS
Progressive
Dolby Prologic
AV- LINK
TUNING
COLOR
SOUND
0
0 (3D Sound)
0

3-2 Samsung Electronics
MEMO

Disassembly and Reassembly
Samsung Electronics 4-1
4. Disassembly and Reassembly
4-1 Back Cover Removal
1. After removing the 16 screws, pull the bottom part of the cabinet back wards.
2. Loosen the 4 screws and remove
the supporter.
4. Loosen the 2 screws. Remove the optical
meter.
3. After loosening the 4 screws, remove the lens
cover and fan duct.
5. Loosen the 2 screws. Remove the stabilizer.

Disassembly and Reassembly
4-2 Samsung Electronics
6. After loosening the 2 screws, remove the
chassis holder and power mounting.
7. After removing the 6 screws, pull the top
cabinet backwards.

Disassembly and Reassembly
Samsung Electronics 4-3
4-2 Lamp Replacement
1. Loosen the screw.
3. Using a hexagonal wrench, loosen the two
screws that secure the lamp.
2. Remove the cover.
4. Pull out the lamp.
5. PROCEDURE
After completing the lamp replacement, enter
the Service Mode
Press the remote control Keys in the following
sequence:
ÒDisplay ➔P.STD ➔Mute ➔PowerÓ
(1) Select 01 (lamp life) with using the channel
(▼) key, then press the volume (+) key
(See the figure below).
(2) Press the Cancel key to reset the lamp life
(Ò00000Ó).
(3) Press the Power key to reset the factory
value.
(4) Press the DISPLAY key to verify that the
lamp use time is ø.
00 Lamp Total time (05999)
01 Lamp Life (05999)

Disassembly and Reassembly
4-4 Samsung Electronics
4-2-1 Lamp (Bulb only) Replacement
1. Loosen the two screws.
3. After loosening the two brackets, remove the
lamp-holder and wires.
2. Remove the lamp-bracket from the lamp
assembly.
4. After loosening one screw and one nut,
remove the bulb.

Disassembly and Reassembly
Samsung Electronics 4-5
4-3 Air Filter Check
2. Remove the cover.
FILTER
3. After removing the holder and filter from the
cover, clean the filter.
1. Loosen the screw.

Disassembly and Reassembly
4-6 Samsung Electronics
4-4 Liquid Crystal Panel Replacement
1. After removing the 16 screws, pull the cabinet
backwards.
3. After loosening the 4 screws, remove the lens
cover and fan duct.
5. Remove the GUIDE from the FPC-Connector.
2. Loosen the 3 screws. Remove the supporter.
4. Loosen the 2 screws. Remove the optical
meter.
6. Remove FPC cable from the FPC-Connector.

Disassembly and Reassembly
Samsung Electronics 4-7
7. Loosen the 2 screws, 2 PCB spacers and
remove the PCB-LCD.
9. Lift the LCD in the direction of arrow.
8. Using a hexagonal wrench, loosen the two
screws.

Disassembly and Reassembly
4-8 Samsung Electronics
4-5 Speaker Removal
1. Loosen the 4 screws and remove the speaker holders.