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Chassis PD22EO Model LW22A13W
Service Manual
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CONFIDENTIAL
TFT-LCD TV/MONITOR
Chassis Model
PD22EO LW22A13W
SERVICE Manual
TFT-LCD TV/MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignment & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams
11. Panel Description
CONFIDENTIAL
1 Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1 Safety Precautions
1-1-1 Warnings
1. For continued safety, do not attempt to modify the
(READING SHOULD
circuit board. NOT BE ABOVE 0.5mA)
2. Disconnect the AC power and DC Power Jack
before servicing. DEVICE
LEAKAGE
CURRENT
UNDER TESTER
1-1-2 Servicing the LCD Monitor TEST
TEST ALL
EXPOSED METAL
1. When servicing the LCD TV disconnect the AC line SURFACES
cord from the AC outlet.
2-WIRE CORD
2. It is essential that service technicians have an
accurate voltage meter available at all times. Check
the calibration of this meter periodically. ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
1-1-3 Fire and Shock Hazard GROUND
Before returning the monitor to the user, perform the Figure 1-1. Leakage Current Test Circuit
following safety checks:
1. Inspect each lead dress to make certain that the 4. With the unit completely reassembled, plug the AC
leads are not pinched or that hardware is not line cord directly into a 120V AC outlet. With the
lodged between the chassis and other metal parts in unit's AC switch first in the ON position and then
the monitor. OFF, measure the current between a known earth
2. Inspect all protective devices such as nonmetallic ground (metal water pipe, conduit, etc.) and all
control knobs, insulating materials, cabinet backs, exposed metal parts, including: metal cabinets,
adjustment and compartment covers or shields, screwheads and control shafts. The current
isolation resistor-capacitor networks, mechanical measured should not exceed 0.5 milliamp. Reverse
insulators, etc. the power-plug prongs in the AC outlet and repeat
3. Leakage Current Hot Check (Figure 1-1): the test.
WARNING: Do not use an isolation transformer during
this test. 1-1-4 Product Safety Notices
Use a leakage current tester or a metering system
Some electrical and mechanical parts have special
that complies with American National Standards
safety-related characteristics which are often not
Institute (ANSI C101.1, Leakage Current for
evident from visual inspection. The protection they give
Appliances), and Underwriters Laboratories (UL may not be obtained by replacing them with
Publication UL1410, 59.7). components rated for higher voltage, wattage, etc. Parts
that have special safety characteristics are identified by
! on schematics and parts lists. A substitute
replacement that does not have the same safety
characteristics as the recommended replacement part
might create shock, fire and/or other hazards. Product
safety is under review continuously and new
instructions are issued whenever appropriate.
LW22A13W 1-1
1 Precautions
CONFIDENTIAL
1-2 Servicing Precautions
WARNING: An electrolytic capacitor installed with the wrong polarity might explode.
Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions
section of this manual.
Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.
1-2-1 General Servicing Precautions
1. Always unplug the unit's AC power cord from the 4. Check the insulation between the blades of the AC
AC power source and disconnect the DC Power plug and accessible conductive parts (examples:
Jack before attempting to: metal panels, input terminals and earphone jacks).
(a) remove or reinstall any component or assembly, 5. Insulation Checking Procedure: Disconnect the
(b) disconnect PCB plugs or connectors, (c) connect power cord from the AC source and turn the power
a test component in parallel with an electrolytic switch ON. Connect an insulation resistance meter
capacitor. (500 V) to the blades of the AC plug.
2. Some components are raised above the printed The insulation resistance between each blade of the
circuit board for safety. An insulation tube or tape AC plug and accessible conductive parts (see
is sometimes used. The internal wiring is above) should be greater than 1 megohm.
sometimes clamped to prevent contact with
6. Always connect a test instrument's ground lead to
thermally hot components. Reinstall all such
the instrument chassis ground before connecting
elements to their original position.
the positive lead; always remove the instrument's
3. After servicing, always check that the screws, ground lead last.
components and wiring have been correctly
reinstalled. Make sure that the area around the
serviced part has not been damaged.
1-3 Electrostatically Sensitive Devices (ESD) Precautions
Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly
called Electrostatically Sensitive Devices (ESD). Examples of typical ESD are integrated circuits and some field-effect
transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor 6. Do not remove a replacement ESD from its
components or assemblies, drain the electrostatic protective package until you are ready to install it.
charge from your body by touching a known earth Most replacement ESDs are packaged with leads
ground. Alternatively, wear a discharging wrist- that are electrically shorted together by conductive
strap device. To avoid a shock hazard, be sure to foam, aluminum foil or other conductive materials.
remove the wrist strap before applying power to 7. Immediately before removing the protective
the monitor. material from the leads of a replacement ESD,
2. After removing an ESD-equipped assembly, place it touch the protective material to the chassis or
on a conductive surface such as aluminum foil to circuit assembly into which the device will be
prevent accumulation of an electrostatic charge. installed.
3. Do not use freon-propelled chemicals. These can Caution: Be sure no power is applied to the
generate electrical charges sufficient to damage chassis or circuit and observe all
ESDs. other safety precautions.
4. Use only a grounded-tip soldering iron to solder or
desolder ESDs. 8. Minimize body motions when handling
unpackaged replacement ESDs. Motions such as
5. Use only an anti-static solder removal device. Some brushing clothes together, or lifting your foot from
solder removal devices not classified as "anti-static" a carpeted floor can generate enough static
can generate electrical charges sufficient to damage electricity to damage an ESD.
ESDs.
1-2 LW22A13W
CONFIDENTIAL
2 Product Specifications
2-1 Specifications
Item Description
LCD Panel TFT-LCD panel, RGB vertical stripe, normally Black, 22-Inch viewable, 0.381 mm x 0.381 mm pixel pitch
Scanning Frequency Horizontal : 30 kHz ~ 48 kHz (Automatic)
Vertical : 60 Hz ~ 75 Hz (Automatic)
Display Colors 16.7 Million colors
Maximum Resolution Horizontal : 1280 Pixels
Vertical : 720 Pixels
Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75 , internally terminated
Input Sync Signal Type : Separate H/V
Level : TTL level
Maximum Pixel Clock rate 70 MHz
Active Display
487.68 mm / 274.32 mm
Horizontal/Vertical
AC power voltage & Frequency AC 90 ~ 264 Volts, 50~60 Hz, DC14V / 8A
Power Consumption 90 W (Max)
Dimensions
Unit (W x D x H) 23.6 x 7.3 x 18.4 Inches (600 x 185 x 468 mm)
Carton (W x D x H) 27.6 x 21.8 x 10.2 Inches (702 x 553 x 260 mm)
Weight (Unit/Gross) 8.8 kg (19.4 lbs) / 15.3 kg (33.7 lbs)
Environmental Considerations Operating Temperature : 50 °F ~ 104 °F (10 °C ~ 40 °C)
Humidity : 10 % ~ 80 %
Storage Temperature : -4 °F ~ 113 °F (-20 °C ~ 45 °C)
Humidity : 5 % ~ 95 %
Tuning Frequency Synthesize
TV System System PAL, SECAM, NTSC 4.4
Sound B/G, D/K, I, L, L'
Antenna Input 75, Coaxial Cable
MAX Internal speaker Out : Right => 7W
Left => 7W
Sound Characteristic
BASS Control Range : -12 dB~ + 12 dB
TREBLE Control Range : -12 dB~ + 12 dB
Headphone Out: 5mW max (400m Vrms)
Output Frequency : RF => 80 Hz ~ 15 kHz
A/V => 80 Hz ~ 15 kHz
LW22A13W 2-1
2 Product Specifications
CONFIDENTIAL
2-2 Pin Assignments
2-2-1 DVI-I (Analog & Digital)
Ref) DVI-D : Digital only
D-SUB : Analog only
1 2 3 4 5 6 7 8
C1 C2
9 10 11 12 13 14 15 16
C3 C4
17 18 19 20 21 22 23 24
DVI-I Receptacle Connector Front View
Pin No. Signal Assignment Pin No. Signal Assignment Pin No. Signal Assignment
1 RX2- 11 GND 21 NC
2 RX2+ 12 NC 22 GND
3 GND 13 NC 23 RXC-
4 NC 14 DDC Input Power(+5V) 24 RXC+
5 NC 15 Self laster C1 Analog Red
6 DDC Clock (SCL) 16 Output Signal Connection C2 Analog Green
7 DDC Data (SDA) 17 RX0- C3 Analog Blue
8 Analog Vertical Sync. 18 RX0+ C4 Analog Horizontal Sync.
9 RX1- 19 GND
10 RX1+ 20 NC
2-2 LW22A13W
2 Product Specifications
CONFIDENTIAL
2-2-2 SCART1, SCART2 2-2-4 S-Video
Pin Items Scart1 Scart2 Pin Separate
No
1 Audio Out (R;500mV/1K) O O 1 GND
2 Audio IN (R;500mV/10K) O O 2 Y
3 Audio Out (L;500mV/1K) O O 3 C
4 Audio Common GND O O 4 GND
5 Blue GND O O 5 GND
6 Audio IN (L;500mV/10K) O O
7 Blue IN (700mV/75) O
Function S/W
8 O O
(0~2V/9, 5V~12V)
9 Green GND O O
10 No Connection O
11 Green IN (700mV/75) O
12 No connection O
13 Red GND O O
14 F/B GND O O
15 Red IN (700mV/75) O
16 RGB F/B (0~0, 4V/1~3V) O
17 Video Output GND O O
18 Video Input GND O O
19 CVBS Out (1V/75) O O
20 CVBS IN (1V/75) O O
21 Common GND O O
2-2-3 A/V
RCA Yellow CVBS
Audio L
RCA White
GND
Audio R
RCA Red
GND
LW22A13W 2-3
2 Product Specifications
CONFIDENTIAL
2-3 Timing Chart
This section of the service manual describes the timing that the computer industry recognizes as standard
for computer-generated video signals.
2-3-1 LCD Panel Mode : 1 mode
N/C : Non-Interlaced, I : Interlaced
44.769
µs
µs
µs
µs
17.186 µs
µs
µs
µs
16.086
µs
µs
µs
74.841
2-4 LW22A13W
2 Product Specifications
CONFIDENTIAL
2-3-2 Supported Modes (1)
µs µs µs µs µs
µs µs µs µs µs
µs µs µs µs µs
µs µs µs µs µs
µs µs µs µs µs
µs µs µs µs µs
µs µs µs µs µs
µs µs µs µs µs
LW22A13W 2-5
2 Product Specifications
CONFIDENTIAL
2-3-2 Supported Modes (2)
µs µs µs µs
µs µs µs µs
µs µs µs µs
µs µs µs µs
µs µs µs µs
µs µs µs µs
µs µs µs µs
µs µs µs µs
2-6 LW22A13W
CONFIDENTIAL
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
LW22A13W monitor.
WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling
these components.
3-1 Disassembly
Cautions:1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.
1. Remove 4 screws of the cover rear.
2. Remove the stand from LCD-TV.
3. Remove 1 screw of the cover rear.
LW22A13W 3-1
3 Disassembly and Reassembly
CONFIDENTIAL
4. Insert a screw driver into upper groove of
stand fitting hole and lift up right & left side
respectively.
5. Pull the cover rear
3-2 Reassembly
Reassembly procedures are in the reverse order of Disassembly procedures.
3-2 LW22A13W
CONFIDENTIAL
4 Alignments and Adjustments
4-1 General Alignment Instuction
1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation.
Check the basic characteristics such as height, horizontal and vertical sync.
2. Use the specified test equipment or its equivalent.
3. Correct impedance matching is essential.
4. Avoid overload. Excessive signal from a sweep generator might overload the front-end
of the TV. When inserting signal markers, do not allow the marker generator to distort
test result.
5. Connect the TV only to an DC power source with voltage and frequency as specified on
the backcover nameplate.
6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure
that the power cord is disconnected before replacing any parts.
7. To protect aganist shock hazard, use an isolation transformer.
LW22A13W 4-1
4 Alignments and Adjustments
CONFIDENTIAL
4-2 Factory Mode Adjustments
4-2-1 Entering Factory Mode
1. To enter "Service Mode" Press the remote - control keys in this sequence :
- If you do not have Factory remote - control
- If you have Factory remote - control
4-2-2 Factory Mode Tree
4-2 LW22A13W
4 Alignments and Adjustments
CONFIDENTIAL
LW22A13W 4-3
4 Alignments and Adjustments
CONFIDENTIAL
Memo
4-4 LW22A13W
CONFIDENTIAL
5 Troubleshooting
5-1 No Power
No
LAMP off, Power indicator LED off. Check a connection the 14V adapter?
Yes
Does proper DC 14V No
1 Change a 14V adaptor. (BN44-00051C)
appear at Pin 1 of CN205?
Yes
Does proper DC 14V No Check a connection the 6 Pin hamess and
2
appear at C847? change a input board assy. (BN59-00339A)
Yes
Does proper DC +3.3V_A, No IC801 or IC805 are bad.
3 +3.3V_B appear at
Change main assy. (BN94-00400A)
C826, C867?
Yes
Does proper DC +2.5V_A, No IC802 or IC806 are bad.
4 +2.5V_B appear at
Change main assy. (BN94-00400A)
C827, C813?
Yes
Does proper DC +5V_A, +5V, No IC810 or IC804 or ICP22 are bad.
5 +5V_LVDS appear at
Change main assy. (BN94-00400A)
C889, C865, CP133?
Yes
Does proper DC +12V_3 No ICP23 is bad.
6
appear at C841? Change main assy. (BN94-00400A)
Yes
Does proper DC +8V No IC843 is bad.
7
appear at C843? Change main assy. (BN94-00400A)
Yes
No Check a other function. (No picture part)
A power is supplied to set.
Replace a assy LCD panel. (BN91-00388L)
LW22A13W 5-1
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
1 2 3
4 5 6
7
5-2 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-2 No Video (Analog PC Signal)
Power indicator is green,
Lamp on, No video.
Yes
Check the PC signal and check No Input a analog signal and
connection of FPC DVI cable? connected cable.
Yes
Does the signal appear at No Change FPC cable (CN100) or change a
8
#18, 16, 14 (R, G, B) of CN100? input board assy. (BN59-00339A)
Yes
Does the signal appear at No IC350 is bad.
9 output of IC350?
Change main board assy. (BN94-00400A)
(#70_R, #2_G, #12_B)
Yes
Does the signal appear at No IC001 or ICP18 or ICP19 are bad.
10 output of [#1_R(IC001),
Change main board assy. (BN94-00400A)
#1_G(ICP19), #15_B(IC001)]?
Yes
Does the signal appear at CR01, No IC200 is bad.
11
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
12
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-3
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
8 9 10
11 12
5-4 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-3 No Video (Digital PC Signal)
Power indicator is green,
Lamp on, No video.
Yes
Check the PC signal and check No Input a digital signal and
connection of FPC DVI cable? connected cable.
Yes
Does the clock pulse appear at No Change FPC cable. (CN100)
13
#5~12 (Data, Clk +/-) of CN100? Change a input board assy. (BN59-00339A)
Yes
Does the clock pulse appear at No
14
ICP01 is bad.
output at Rap18~RAP21,
Change main board assy. (BN94-00400A)
Rap28, 29 of ICP18, ICP19?
Yes
Does the signal appear at No IC001 or ICP18 or ICP19 are bad.
15 output of [#1_R(IC001),
Change main board assy. (BN94-00400A)
#1_G(ICP19), #15_B(IC001)]?
Yes
Does the signal appear at CR01, No IC200 is bad.
16
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock appear at No IC300 or IC901 are bad.
17
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-5
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
13 14 15
16 17
5-6 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-4 No Picture (Tuner_CVBS)
Power indicator is off, No Connect the RF cable and
Lamp on, No picture. check RF signal.
Yes
No Check the DC voltage. (#4 of tuner) : 10V~33V
18 Does the signal appear at R2?
Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN101)
19
C042(#1) of input? Change a input board assy. (BN59-00339A)
Yes
Does the clock pulse appear at No IC010 is bad.
20
3230Y, C_OUT(0:7) of IC010? Change main board assy. (BN94-00400A)
Yes
Does the clock pules appear at No IC001 or ICP18 are bad.
21
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
22
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock appear at No IC300 or IC901 are bad.
23
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-7
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
18 19 20
21 22 23
5-8 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-5 No Picture (Video_CVBS)
Power indicator is off, No Connect the video cable.
Lamp on, No picture. Operating a video player.
Yes
No Change s video cable.
24 Does the signal appear at R8?
Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN101)
25
C046(#8) of input IC011? Change a input board assy. (BN59-00339A)
Yes
Does the clock pulse appear at No IC010 is bad.
26
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pules appear at No IC001 or ICP18 are bad.
27
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
28
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
29
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-9
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
24 25 26
27 28 29
5-10 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-6 No Picture (S-Video_Y, C)
Power indicator is off, No Connect the S-Video cable.
Lamp on, No picture. Operating a video player.
Yes
Does the signal No Chagne a S-Video cable.
30
appear at R9, R10 (Y, C)? Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN101)
31 C044(#5, Y), C045(#6, C) of
Change a input board assy. (BN59-00339A)
input IC011?
Yes
Does the clock pulse appear at No IC010 is bad.
32
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC001 or ICP18 are bad.
33
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
34
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
35
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-11
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
30 31 32
33 34 35
5-12 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-7 No Picture (SCART1, 2_CVBS : Low Resolution)
Power indicator is off, No Connect the scart cable.
Lamp on, No picture. Operating a video player.
Yes
Does the signal appear at No Chagne a scart cable.
36
R98, R102 (SC1, 2 CVBS)? Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN102)
37 C043(#3, SC1), C048(#10, SC2)
Change a input board assy. (BN59-00339A)
of input IC011?
Yes
Does the clock pulse appear at No IC010 is bad.
38
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC001 or ICP18 are bad.
39
output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
40
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
41
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-13
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
36 37 38
39 40 41
5-14 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-8 No Picture (SCART1 R, G, B : High Resolution)
No Connect the scart cable.
Power indicator is off,
Operating a video player.
Lamp on, No picture.
(Select R, G, B input mode)
Yes
Does the signal appear at No Chagne a scart cable.
42
R101(R), R100(G), R99(B)? Change a input board assy. (BN59-00339A)
Yes
Does the signal appear at No Change FPC cable. (CN102)
43 R123(#7, R), R122(#9, G),
Change a input board assy. (BN59-00339A)
R121(#11, B) of input IC013?
Yes
Does the clock pulse appear at No IC010 is bad.
44
output of IC006~IC009? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear No IC001 or ICP18 are bad.
45
at output of IC002~IC005? Change main board assy. (BN94-00400A)
Yes
Does the signal appear at CR01, No IC200 is bad.
46
CG01, CB01 of R, G, B output? Change main board assy. (BN94-00400A)
Yes
Does the clock pulse appear at No IC300 or IC901 are bad.
47
output of RA311~RA313? Change main board assy. (BN94-00400A)
Yes
Check a LVDS cable. No
Replace a assy LCD panel. Please, call to Samsung Co, LTD.
(BN91-00388L)
LW22A13W 5-15
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
42 43 44
45 46 47
5-16 LW22A13W
5 Troubleshooting
CONFIDENTIAL
5-9 No Sound
No Connect the sound cable.
Picture is display. (RF, Video, Scart, PC etc)
Connect a speaker wire.
Yes
Does the signal appear at
Pin 67 (Tuner sound signal) and Pin
47, 48 (PC sound) and Pin 53, 54 No Chagne a FPC cable. (CN101)
48
(SCART1 sound) and Pin 56, 57 Change a input board assy. (BN59-00339A)
(SCART2 sound) and Pin 50, 51
(VCR) of IC919 (MSP3451G)?
Yes
Check the DC +8V, No Power rugulator IC (ICP23) are bad.
49
+12V_3 of IC919, IC501? Change main board assy. (BN94-00400A)
Yes
Does the signal No Sound IC (IC919 or IC501) are bad.
50
appear at L501~L504? Change main board assy. (BN94-00400A)
Yes
Replace the speaker assy
BN96-00176A (R),
BN96-00177A (L)?
LW22A13W 5-17
5 Troubleshooting
CONFIDENTIAL
WAVEFORMS
48 49 50
5-18 LW22A13W
CONFIDENTIAL
6 Exploded View and Parts List
LW22A13W 6-1
6 Exploded View & Parts List
CONFIDENTIAL
Memo
6-2 LW22A13W
CONFIDENTIAL
8 Block Diagram
8-1 Main
LW22A13W 8-1
8 Block Diagrams
CONFIDENTIAL
8-2 Power
LVDS
8-2 LW22A13W
LW22A13W
9
8
7
6
5
4
3
2
1
15
14
13
12
11
10
NC
14V
14V
14V
14V
14V
14V
GND
GND
GND
GND
GND
GND
9-1 Main PCB
ADJ_BRIGHT
SW_INVERTER
9 Wiring Diagram
CN104
1 +14V
2 +14V
CN103
3 +14V
4 GND
5 GND
6 GND
1 GND 16 GND
2 R_COMP2/SC1_IN 17 SIF
3 L_COMP2/SC1_IN 18 IDENT_H/P
CN101
4 GND 19 WOOFER_OUT
5 R_COMP1/SC1_IN 20 SEL_COMP1/2
6 L_COMP1/SC1_IN 21 SEL_PC/COMP
7 GND 22 IR
8 PC_R 23 LED_GRN
9 PC_L 24 SVIDEO_C
10 25 ADJ_GAMMA 1
GND LED_RED
11 AVI_R 26 SVIDEO_Y LVDS_GND 2
CNP1
12 AVI_L 27 GND TXOUT 0- 3
13 GND 28 VIDEO_CVBS TXOUT 0+ 4
14 HP_R 29 GND LVDS_GND 5
15 HP_L 30 TUNER_CVBS TXOUT 1- 6
TXOUT 1+ 7
LVDS_GND 8
TXOUT 2- 9
1 CHECK_CN102 16 GND TXOUT 2+ 10
LVDS_GND 11
2 GND 17 SC1_CVBS_IN
TXCLKOUT - 12
3 SC2_R_OUT 18 GND
CN102
TXCLKOUT + 13
4 GND 19 SC1_FB
LVDS_GND 14
5 SC2_L_OUT 20 GND
TXOUT 3- 15
6 GND 21 SC1_BLUE
TXOUT 3+ 16
7 SC1_R_OUT 22 GND
8 GND 23 SC1_GREEN LVDS_GND 17
9 24 LVDS_GND 18
SC1_L_OUT GND
10 25 +5V_LVDS 19
GND SC1_RED
11 SC2_CVBS_OUT 26 GND +5V_LVDS 20
12 GND 27 SC2_FSW
13 SC2_CVBS_IN 28 GND
14 GND 29 SC1_FSW
15 SC1_CVBS_OUT 30 GND
1 GND 16 PC_G/COMP_Y
2 SW_BUZZER 17 GND
3 IDENT_PC 18 PC_R/COMP_Pr
CN100
4 GND 19 GND
5 DVI_RX2- 20 DSUB_VSYNC
6 DVI_RX2+ 21 DSUB_HSYNC
7 DVI_RX1- 22 +5V
8 DVI_RX1+ 23 +5V_A
9 DVI_RX0- 24 +3.3V_A
10 DVI_RX0+ 25 GND
11 DVI_RXC- 26 EXT_DATA
12 DVI_RXC+ 27 EXT_CLK
13 GND 28 GND
14 PC_B/COMP_Pb 29 SDA2
15 GND 30 SCL2
CN501(L)
CN502(R)
-
NC
+
-
+
3
2
1
2
1
CONFIDENTIAL
9-1
9-2
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
10
CH-
9-2 Input
CH+
GND
GND
GND
GND
VOL-
GND
+14V
+14V
+14V
VOL+
MENU
+5V_A
BUZZER
SOURCE
9 Wiring Diagrams
1 +14V
2 +14V
3 GND
CN213
4 GND
5 GND
6 GND
CN206
CN205
1 GND
2 NC
CN19
HP_L 16 TUNER_CVBS 1
3 VIDEO_CVBS
HP_R 17 GND 2
GND 18 VIDEO_CVBS 3
CN201
AVI_L 19 GND 4
1 GND AVI_R 20 SVIDEO_Y 5
2 AV_R GND 21 LED_RED 6
3 AV_R PC_L 22 SVIDEO_C 7
CN211
4 GND PC_R 23 LED_GRN 8
5 AV_L GND 24 IR 9
6 AV_L SC1_L_IN 25 GND 10
SC1_R_IN 26 GND 11
GND 27 WOOFER_OUT 12
SC2_L_IN 28 IDENT_H/P 13
1 SVIDEO_C SC2_R_IN 29 SIF 14
2 SVIDEO_Y GND 30 GND 15
3 GND
CN208
4 GND
5 GND
6 NC
SC1_CVBS_OUT 16 NC 1
GND 17 SC1_FSW 2
SC2_CVBS_IN 18 GND 3
CN203
2 GND GND 19 SC2_FSW 4
3 WOOFER_OUT SC2_CVBS_OUT 20 GND 5
CN207
4 WOOFER_OUT GND 21 SC1_RED 6
SC1_L_OUT 22 GND 7
GND 23 SC1_GREEN 8
SC1_R_OUT 24 GND 9
TUNER
U1
1
GND 25 SC1_BLUE 10
SC2_L_OUT 26 GND 11
GND 27 SC1_FB 12
SC2_R_OUT 28 GND 13
1 SC1_R_OUT 12 NC
GND 29 SC1_CVBS_IN 14
INPUT BOARD
2 SC1_R_IN 13 GND
GND 30 GND 15
3 SC1_L_OUT 14 GND
CN300
4 GND 15 SC1_RED
5 GND 16 SC1_FB
6 SC1_L_IN 17 GND
7 SC1_BLUE 18 GND GND 16 SCL2 1
8 SC1_FSW 19 SC1_CVBS_OUT PC_BLUE 17 SDA2 2
9 GND 20 SC1_CVBS_IN GND 18 GND 3
CN200
10 NC 21 GND DVI_RXC+ 19 EXT_CLK 4
11 SC1_GREEN DVI_RXC- 20 EXT_DATA 5
DVI_RX0+ 21 GND 6
DVI_RX0- 22 +3.3V_A 7
DVI_RX1+ 23 +5V_A 8
1 SC2_R_OUT 12 NC DVI_RX1- 24 +5V 9
2 SC2_R_IN 13 GND DVI_RX2+ 25 PC_HSUNC 10
3 SC2_L_OUT 14 GND DVI_RX2+ PC_VSUNC
CN301
26 11
4 GND 15 NC GND 27 GND 12
5 GND 16 NC IDENT_PC 28