Read Panasonic TC-15LT1 Service Manual online
Power Source
AC 100~240V, 50/60Hz
Power Consumption
Average use: 52W (Maximum current 0.9A)
Stand-by condition: 2W (at 120V), 3W (at 240V)
TV set
DC 15V, 3.1 A max.
LCD
15.2-inch, 16:9 aspect ratio LCD panel
Screen Size
13.19" (335mm)(W) x 7.40" (188mm)(H)
Channel Capability-181
VHF-12: UHF-56: Cable-125
Sound
Speaker
Tweeter (3 x 4cm 2pcs, 8
Ω), Woofer (Ø5cm, 8Ω)
Audio Output
6.5W (2.0W+2.0W+2.5W (Woofer)), 10%THD, 65Hz~20kHz
Headphones
M3(3.5 mm) Jack x 1
FEATURES
3D Y/C Digital comb Filter
Aero-Hammer
®
Woofer System (2Way 3Speaker System)
CLOSED CAPTION
V-Chip
Accessories Supplied
Remote control Transmitter N2QAFC000006
Lithium Battery: CR2025 x 1
2000
TC-15LT1
FL1 Chassis
Operating Conditions
Temperature: 41°F-95°F(5-35°C)
Humidity: 5%-90% RH (non-condensing)
Connection Terminals
Video In
VIDEO
RCA PIN Type x 1
1.0Vp-p
S-VIDEO
Mini DIN 4-pin
Y:1Vp-p(75
Ω), C: 0.286Vp-p(75Ω)
AUDIO L-R
RCA PIN Type x 2
1.0Vp-p
COMPONENT IN VIDEO
D Type Connecter
Y, P
B
, P
R
AUDIO L-R
RCA PIN Type x 2
0.5Vrms
AUDIO OUT
M3 Stereo Jack x 1
0.5Vrms
Dimensions (W x D x H)
Including TV Stand
16.26" (413mm) x 7.09" (180mm) x 12.99"(330mm)
TV Set Only
16.26" (413mm) x 2.44" (62mm) x 11.61"(295mm)
Weight (Mass)
12.35lb. (5.6kg) Net
Note:
Design and Specifications are subject to change without notice.
Weight and Dimensions shown are approximate.
Weight and Dimensions shown are approximate.
15.2” LCD TV
ORDER NO.ITD0011013C1
B05
1 Safety Precautions
3
1.1. General Guidelines
3
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
3
3 Self-check function
5
3.1. How to access
5
3.2. Screen display
5
3.3. Display phenomenon and treatment method
5
4 Chasis Board Layout
6
5 Servicing method
7
5.1. Removing tilt base
7
5.2. Removing rear panel
8
5.3. Removing speaker unit
8
5.4. Removing front panel
9
5.5. Removing LCD panel
9
5.6. Removing main A-PCB
10
5.7. Removing B-PCB (with tuner assembly)
11
5.8. Removing digital module
12
5.9. Removing H1-PCB and H2-PCB
12
5.10. Removing PI-PCB
13
5.11. Removing K-PCB
13
5.12. Pull out the flexible cable straight to the coupler.
13
5.13. Removing back-light
14
5.14. Main PCB servicing
14
6 Adjustment method
15
6.1. Test Point Location
15
6.2. Service adjustment mode
15
6.3. RF video level adjustment
18
6.4. Component input video level adjustment
19
6.5. Video input video level adjustment
19
6.6. Video input sub color adjustment
20
7 Conductor Views
21
7.1. A-Board
21
7.2. DG-Board
24
7.3. B, H1, H2, K, P1 and V-Board
26
8 Block and Schematic Diagrams
29
8.1. Schematic Diagram Notes
29
8.2. Interconnection Schematic Diagrams
30
8.3. Power Block Diagrams
31
8.4. Signal Block Diagrams
33
8.5. DG-Board Block Diagram
35
8.6. H1, H2, and A-Board (1/8) Schematic Diagrams
36
8.7. A-Board (2/8) Schematic Diagrams
37
8.8. A-Board (3/8) Schematic Diagrams
38
8.9. B and A-Board (4/8) Schematic Diagrams
39
8.10. A-Board (5/8) Schematic Diagrams
40
8.11. A-Board (6/8) Schematic Diagrams
41
8.12. K and A-Board (7/8) Schematic Diagrams
42
8.13. V and A-Board (8/8) Schematic Diagrams
43
8.14. DG-Board (1/3) Schematic Diagrams
44
8.15. DG-Board (2/3) Schematic Diagrams
45
8.16. DG-Board (3/3) Schematic Diagrams
46
8.17. P1-Board Schematic Diagrams
47
9 Parts Location & Mechanical Replacement Parts List
49
9.1. Parts Location
49
9.2. Mechanical Replacement Parts List
50
9.3. Packing Exploded View
50
10 Replacement Parts List
51
10.1. Replacement Parts List Notes
51
10.2. Electrical Replacement Parts List Notes
52
11 Dimensions
61
CONTENTS
Page
Page
2
TC-15LT1
1.1.1.
Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the equipment such as screwheads, connectors,
control shafts, etc.When the exposed metallic part has a
return path to the chassis, the reading should be between
1M
part on the equipment such as screwheads, connectors,
control shafts, etc.When the exposed metallic part has a
return path to the chassis, the reading should be between
1M
Ω and 5.2MΩ.
When the exposed metal does not have a return path to
the chassis, the reading must be
.
Figure 1
1.1.2.
Leakage Current Hot Check (See
Figure 1.)
Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use an
isolation transformer for this check.
2. Connect a 1.5k
Ω, 10 watts resistor, in parallel with a 0.15µF
capacitors, between each exposed metallic part on the set
and a good earth ground such as a water pipe, as shown in
Figure 1.
and a good earth ground such as a water pipe, as shown in
Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the
above measurements.
6. The potential at any point should not exceed 0.75 volts
RMS.A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current
equivalent) may be used to make the hot checks, leakage
current
must
not
exceed
1/2
milliamp.In
case
a
measurement is outside of the limits specified, there is a
possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the
customer.
possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the
customer.
1 Safety Precautions
1.1.
General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity.Such components commonly are called
Electrostatically Sensitive (ES) Devices.Examples of typical ES 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 electro static discharge (ESD).
Electrostatically Sensitive (ES) Devices.Examples of typical ES 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 electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground.Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
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 ES devices, place the assembly on a conductive surface such as alminum
foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, alminum foil or comparable
conductive material).
conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
3
TC-15LT1
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise hamless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to
damage an ES device).
damage an ES device).
4
TC-15LT1