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ORDER NO. ITD0303001C2
15.2" Diagonal LCD TV
TX-15LT2M
TX-15LT2Q
TX-15LT2Z
TX-15LT2X
TX-15LT2T
LH1 Chassis
Specifications
Power Source Receiving System
AC 100~240V, 50/60Hz
Power Consumption
Average use: 49W
Stand-by condition: 4W
TV set: DC 15V, 2.8 A max.
LCD
15.2-inch (385mm), 16:9 aspect ratio LCD panel
Screen Size
13.21-inch (335.6mm) (W) x 7.43-inch (188.6mm)(H) x 15.2-
inch (385.0mm)(Diagonal)
Sound
Speaker
Tweeter (3 x 4cm 2pcs, 89), Woofer (Ø5cm, 89) Receiving Channels
Audio Output Regular TV
6.5W (2.0W+2.0W+2.5W (Woofer)), 10%THD VHF BAND
Headphones 2-12 (PAL/SECAM B, K1)
M3(3.5 mm) Jack x 1 89 impedance 0-12 (PAL B AUST.)
FEATURES 1-9 (PAL B N.Z)
Aero-Hammer® Woofer System (2Way 3Speaker System) 1-12 (PAL/SECAM D)
1-12 (NTSC M Japan)
2-13 (NTSC M U.S.A)
UHF BAND
21-69 (PAL G, H, I/SECAM G, K, K1)
28-69 (PAL B AUST.)
13-57 (PAL D, K)
© 2003 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
13-62 (NTSC M Japan) VIDEO
14-69 (NTSC M U.S.A) RCA PIN Type x 1
14-69 (NTSC M U.S.A) S-VIDEO
CATV Mini DIN 4-pin
S1-S20 (OSCAR) AUDIO L-R
1-125 (U.S.A CATV) RCA PIN Type × 2
C13-C49 (JAPAN) AUDIO OUT
S21-S41 (HYPER) 3.5mm, Stereo Jack 0.5Vrms
Z1-Z37 (CHINA) Dimensions (W x H x D)
5A, 9A (AUST.) Including TV Stand
Aerial-Rear 413mm x 330mm x 180mm
UHF/VHF TV Set Only
Operating Conditions 413mm x 295mm x 73mm
Temperature: 5-40°C Weight (Mass)
Humidity: 5%-90% RH (non-condensing) 5.6kg Net
Connection Terminals Storage Conditions
AV1 Temperature: 55°C MAX
21 Pin socket Note:
(Audio/ Video in, TV out, RGB in) Design and Specifications are subject to change without notice.
AV2 Weight and Dimensions shown are approximate.
CONTENTS
Page Page
1 Safety Precautions 4 8.1. How to enter SERVICE 1 17
1.1. General Guidelines 4 8.2. How to enter SERVICE 2 17
2 Prevention of Electro Static Discharge (ESD) to 8.3. Option Description 19
Electrostatically Sensitive (ES) Devices 5 8.4. Option Code Setting 21
3 About lead free solder (PbF) 6 9 Adjustment 22
4 Self Check 7 9.1. RF AGC Adjustment 22
5 SERVICE HINTS 7 9.2. DVCO Adjustment 22
5.1. Hotel Mode 7 10 Conductor Views 23
6 Chasis Board Layout 8 10.1. A-Board 23
7 Servicing method 9 10.2. B, H, K, P and V-Board 25
7.1. Removing tilt base 9 10.3. DG-Board 27
7.2. Removing rear panel 10 11 Block and Schematic Diagrams 29
7.3. Removing speaker unit 10 11.1. Schematic Diagram Notes 29
7.4. Removing front panel 11 11.2. Power Block Diagram 30
7.5. Removing LCD panel 11 11.3. Signal Block Diagram 32
7.6. Removing main A-Board 12 11.4. A-Board (1 of 4) Schematic Diagram 34
7.7. Removing B-Board (with tuner assembly) 13 11.5. A-Board (2 of 4) Schematic Diagram 35
7.8. Removing DG-Board 14 11.6. A-Board (3 of 4) Schematic Diagram 36
7.9. Removing H-Board 14 11.7. A-Board (4 of 4) Schematic Diagram 37
7.10. Removing P-Board 15 11.8. DG-Board (1 of 5) Schematic Diagram 38
7.11. Removing K-Board 15 11.9. DG-Board (2 of 5) Schematic Diagram 39
7.12. Pull out the flexible cable straight to the coupler. 15 11.10. DG-Board (3 of 5) Schematic Diagram 40
7.13. Removing back-light 16 11.11. DG-Board (4 of 5) Schematic Diagram 41
7.14. A-Board servicing 16 11.12. DG-Board (5 of 5) Schematic Diagram 42
8 Service Mode Function 17 11.13. B, H, K, and V-Board Schematic Diagram 43
2
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
11.14. P-Board Schematic Diagram 44 12.3. Mechanical Replacement Parts List 47
12 Parts Location & Mechanical Replacement Parts List 45 13 Replacement Parts List 48
12.1. Parts Location 45 13.1. Replacement Parts List Notes 48
12.2. Packing Exploded View 46 13.2. Electrical Replacement Parts List Notes 49
3
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
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.
1.1.1. Leakage Current Cold Check 1.1.2. Leakage Current Hot Check (See
1. Unplug the AC cord and connect a jumper between the two
Figure 1.)
prongs on the plug. 1. Plug the AC cord directly into the AC outlet. Do not use an
2. Measure the resistance value, with an ohmmeter, between isolation transformer for this check.
the jumpered AC plug and each exposed metallic cabinet 2. Connect a 1.5k9, 10 watts resistor, in parallel with a 0.15µF
part on the equipment such as screwheads, connectors, capacitors, between each exposed metallic part on the set
control shafts, etc. When the exposed metallic part has a and a good earth ground such as a water pipe, as shown in
return path to the chassis, the reading should be between Figure 1.
1M9 and 5.2M9. 3. Use an AC voltmeter, with 1000 ohms/volt or more
When the exposed metal does not have a return path to sensitivity, to measure the potential across the resistor.
the chassis, the reading must be .
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 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
Figure 1 repaired and rechecked before it is returned to the
customer.
4
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
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).
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.
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).
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.
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).
5
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
3 About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and (Cu) although other types are available.
This model uses Pb Free solder in it's manufacture due to environmental conservation issues. For service and repair work, we'd
suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol stamped on the back of PCB.
Caution
· Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30 ~ 40 °C) higher.
Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).
· Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb
solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
· After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto
the opposite side. (see figure below)
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder.
However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.
6
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
4 Self Check
1. Self-Check is used to automatically check the bus lines and hexadecimal code of the TV set.
2. To get into the Self -Check mode press the [ Down ( ) ] button on the customer controls at the front of the set, at the same
time pressing the [ SET UP ] button on the remote control, and the screen will show :
If the CCU ports have been checked and found to be incorrect or not located then "--" will appear in place of "O.K.".
5 SERVICE HINTS
5.1. Hotel Mode
Purpose
1. At Hotels, this Mode prevent customer from changing the TV preset data, such as Channel preset data.
Note:
This Mode is useful for hotel, you should not get into "Hotel Mode" with Normal use.
Operation
1. To get into " Hotel Mode", press "Recall" button on the remote control and Channel up "[ ]" key on the TV set
simultaneously, after setting the "Off-Timer" mode.
2. In this mode, The Channel up and down Function will be able as normal Mode, and The maximum volume level for this
mode is set at the current volume level, that means setting at the level before entering the mode. However, other function
will be disable.
3. To exit This mode, press "SET UP" button on the remote control and the "Volume Down [ ]" key on the TV set
simultaneously.
* This Information is informed by Service Manual only.
7
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
6 Chasis Board Layout
8
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7 Servicing method
7.1. Removing tilt base
9
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.2. Removing rear panel
7.3. Removing speaker unit
10
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.4. Removing front panel
7.5. Removing LCD panel
11
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.6. Removing main A-Board
12
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.7. Removing B-Board (with tuner assembly)
13
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.8. Removing DG-Board
7.9. Removing H-Board
14
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.10. Removing P-Board
7.11. Removing K-Board
7.12. Pull out the flexible cable straight to the coupler.
15
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
7.13. Removing back-light
7.14. A-Board servicing
* Follow the procedures described below when checking voltage on rear side of the A-Board.
16
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
8 Service Mode Function
MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be
adjusted by remote control in Service Mode.
8.1. How to enter SERVICE 1
1. In sound menu, set BASS to MAXIMUM, and set TREBLE to MINIMUM.
2. Simultaneously press INDEX button on remote control and DOWN button [ ] on the TV set.
8.2. How to enter SERVICE 2
1. Set the channel to CH99.
2. Press HOLD button on remote control.
Note:
To exit to Service mode, press N or Power button on remote control.
17
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
18
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
8.3. Option Description
Option Models M Q Z X T Description
option1 CF
b0 1 Colour system Auto(1)
b1 1 SECAM(1)
b2 1 NTSC(1)
b3 1 M.NTSC(1)
b4 0 TV NTSC 50 Reserved
b5 0 TV SECAM 60 Reserved
b6 1 AV NTSC 50 Reserved
b7 1 AV SECAM 60 Reserved
option2 FF
b0 1 CH Plan ASIA / M.E. / HK / UK / CHINA (1)
b1 1 NZ / INDES (1)
b2 1 AUSTRALIA (1)
b3 1 E. EUROPE (1)
b4 1 SPECIAL (1)
b5 1 AMERICA (1)
b6 1 CATV (1)
b7 1 JAPAN (1)
option3 10
b0 0 sub picture without sub-picture (0), with sub-picture (1)
b1 0 2tuner 2 tuner (1), 1 tuner (0)
b2 0 VGA enable (1)
b3 0 YUV enable (1)
b4 1 Wide (16:9) 16:9 (1), 4:3 (0)
b5 0 HYPER not use
b6 0 SIF I only(0), BG only(1)
b7 0 I/BG/DK/L(2), BG/DK(3)
option4 E2
b0 0 A2 enable 4.5 (1)
b1 1 5.5 (1)
b2 0 6.0 (1)
b3 0 6.5 (1)
b4 0 NICAM enable 4.5 (1)
b5 1 5.5 (1)
b6 1 6.0 (1)
b7 1 6.5 (1)
option5 DE
b0 0 A2 select 6.5MHz 5.742 MHz (0), 6.742 MHz
b1 1 NICAM priority ASIA / M.E. (1)
b2 1 HK / UK (1)
b3 1 CHINA (1)
b4 1 NZ / INDN (1)
b5 0 AUSTRALIA (1)
b6 1 E. EUROPE (1)
b7 1 SPECIAL (1)
option6 C1
b0 1 VCR/GAME in search On (0), Off (1)
b1 0 SASO enable SASO enable (1)
b2 0 Noise mute Noise mute enable(0)
b3 0 Monitor out AV1 mute Monitor out AV1 mute(1)
b4 0 AV SW 3/2AV out set to 0
b5 0 Tuner MACO tuner (0), ALPS tuner (1)
b6 1 Child lock Child lock enable (1)
b7 1 TEXT VDEFEAT VDEFEAT ON (1), OFF (0)
option7 46
b0 0 Power up EC-Mode Power on EC enable (1)
b1 1 CH Blanking Blanking enable (1)
b2 1 AV Blanking Blanking enable (1)
b3 0 Auto WIDE WSS enable only in aspect Auto (0), WSS always enable (1)
b4 0 Volume correction TV Volume correction enable (1)
b5 0 AVLink Q-Link on/off selectable in menu (1)
b6 1 MPX/NICAM display Display NICAM (0), Display MPX (1)
b7 0 free
19
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
Option Models M Q Z X T Description
option8 51 D0 51
b0 1 0 1 Teletext CH Refresh Enable(1)
b1 0 0 0 Geomagnetic Sensor set to 0
b2 0 0 0 Geomagnetic Polarity set to 0
b3 0 0 0 RF Attenuation Enable(1)
b4 1 1 1 Fine tuning Enable(1)
b5 0 0 0 Search speed Slow(1) Fast(0)
b6 1 1 1 TEXT FLOF Reserved
b7 0 1 0 TEXT TOP TOP enable (1)
option9 80
b0 0 free
b1 0 free
b2 0 free
b3 0 free
b4 0 free
b5 0 Surround SP polarity set to 0
b6 0 Volume curve Volume curve1(0), curve2(1)
b7 1 Volume EXDAC Add Volume
option10 89 83 85
b0 1 1 1 OSD language English Only enable (1) : Top Prority
b1 0 1 0 Arabic enable (1)
b2 0 0 1 Russian enable (1)
b3 1 0 0 Chinese enable (1)
b4 0 0 0 Blue Back enable(0)
b5 0 0 0 free
b6 0 0 0 free
b7 1 1 1 OVP set to 1
option11 0A
b0 0 Shop mode enable(1)
b1 0 Full / 16:9 display Reserved
b2 0 Sub Headphone enable (1)
b3 1 Scan mode Blanking Blanking enable (1)
b4 0 User aspect 14:9 enable (1)
b5 1 NICAM C4 bit enable (1)
b6 0 ID-1 enable (1)
b7 1 1080i enable (1)
option12 41 43 41 Area Option
b0 1 1 1 Asia Asia (1), europe (0)
b1 0 1 0 Australia Australia (1)
b2 0 0 0 Ireland Ireland(1)
b3 0 0 0 UK UK(1)
b4 0 0 0 MELCOA MELCOA (1)
b5 0 0 0 28 inch Reserved for 28 inch etc.
b6 1 1 1 Large size set to 1
b7 0 0 0 PTV set to 0
option13 4A Temporary
b0 0 VDU Version A21 (0), A12(1)
b1 1 GC Version ES5 (0), ES6 (1)
b2 0 UV Swap Swap (1)
b3 1 TEXT Enable (1)
b4 0 LT2 22inch 22inch (1), 15inch (0)
b5 0 free
b6 1 Picture Shift set to 1
b7 0 CIP2 without CIP1 (0), with CIP (1)
20
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
8.4. Option Code Setting
If the memory IC (IC1004) or DG Board is replaced, option code should be re-memorized.
Spare part of IC1004 is already memorized all Data for TX-15LT2M/Z.
If you use for other model, you should re-memorized the different option code in SERVICE 2 mode.
21
TX-15LT2M / TX-15LT2Q / TX-15LT2Z / TX-15LT2X / TX-15LT2T
9 Adjustment
9.1. RF AGC Adjustment
1. Connect RF signal generator to antenna terminal.
2. Receive a RF signal, Colour bar.
3. Enter service 1 mode, and select RF AGC.
4. Adjustment begins when the blue button of the remote controller is pushed.
5. It waits to become stable.
6. The STR button of the remote controller is pushed, and adjustment value is saved.
9.2. DVCO Adjustment
1. Connect PAL colour bar signal generator to AV1 (SCART) terminal.
2. Input a PAL Color bar.
3. Enter service 1 mode, and select DVCO.
4. Adjustment begins when the blue button of the remote controller is pushed.
5. It waits to become stable.
6. The STR button on remote controller is pushed, and adjustment value is saved.
22
Remarks:
1. The Power Circuit contains a circuit area which uses a separate power supply to isolate the
earth connection.
The circuit is defined by HOT and COLD indications in the schematic diagram. Take the
follwing precautions.
All circuits, except the Power Circuit, are cold.
Precautions
a. Do not touch the hot part or the hot and cold parts at the same time or you may
be shocked.
b. Do not short- circuit the hot and cold circuits or a fuse may blow and parts may
break.
c. Do not connect an instrument, such as an oscilloscope, to the hot and cold
circuits simultaneously or a fuse may blow.
Connect the earth of instruments to the earth connection of the circuit being
measured.
d. Make sure to disconnect the power plug before removing the chassis.
2. Following diodes are interchangeable.
MA150- MA162 (Replacement part)
TX-15LT2M/Q/T/X/Z
Schematic Diagram Notes
TX-15LT2M/Q/T/X/Z Power Block Diagram TX-15LT2M/Q/T/X/Z Power Block Diagram
TX-15LT2M/Q/T/X/Z Signal Block Diagram TX-15LT2M/Q/T/X/Z Signal Block Diagram
TX-15LT2M/Q/T/X/Z Signal Block Diagram TX-15LT2M/Q/T/X/Z Signal Block Diagram
A-BOARD (COMPONENT SIDE)
TNPH0529
6
A
5
Parts Location
4 A-BOARD (COMPONENT SIDE)
IC Q810 B-2 TP
Q811 E-5
IC001 D-6 TP4010 F-1
Q812 E-5
IC801 B-5 TP4011 F-1
Q816 A-1
IC802 C-3 TP4012 F-1
Q822 B-5
IC803 B-3 TP4013 F-1
Q823 E-5
IC804 C-2 TP4014 G-1
Q824 E-5
IC806 B-5 TP4015 F-1
Q825 B-5
IC808 C-2 TP4016 F-1
Q826 D-5
IC810 C-3 TP4017 G-2
Q2301 B-4
IC2301 C-5 TP4018 G-2
Q2302 B-4
IC2502 B-5 TP4019 G-2
Q2303 B-4
IC2503 D-4 TP4207 G-1
Q2504 D-4
IC4001 E-2 TP4209 G-1
3 IC4002 D-3
Q2505 D-4
Q2506 D-3
IC4003 E-3
Q2510 E-5
IC4004 E-3
Q2511 E-5
TRANSISTOR Q2512 C-4
Q2517 D-5
Q001 E-3
Q2518 D-5
Q003 E-2
Q4001 E-1
Q004 D-3
Q4002 E-3
Q005 E-3
Q4003 E-3
Q802 C-2
Q4004 E-3
Q803 C-2
Q4005 D-3
Q806 C-2
Q4006 E-3
Q808 C-2
2
1
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
A-BOARD TNPA0529 A-BOARD TNPA0529
A B C D E F G
A-BOARD (FOIL SIDE)
TNPH0529
6
A
5
Parts Location
A-BOARD (FOIL SIDE)
IC TP TP2336 E-4
4 IC2301 D-4 Q2516 D-4 TP2337 E-4
Q2519 E-5 TP4020 D-3
TRANSISTOR TP801 B-5 TP4021 D-3
TP802 F-5 TP4022 C-2
Q002 B-3 TP4023 C-2
TP803 F-6
Q007 C-5 TP4024 B-1
TP804 B-2
Q008 C-5 TP4025 B-1
TP805 F-1
Q801 E-2 TP4028 C-3
TP806 F-5
Q804 C-6 TP4029 C-3
TP807 E-2
Q805 C-6
TP808 E-2
Q807 E-2
TP809 E-3
Q809 E-2
TP810 F-3
Q813 E-2
TP811 F-4
Q814 E-2
TP812 E-2
3 Q815 E-2
TP813 D-2
Q817 F-4
TP814 E-3
Q818 C-5
TP815 E-3
Q819 F-4
TP816 E-3
Q820 F-5
TP817 E-2
Q821 C-5
TP818 D-2
Q2301 E-4
TP819 D-3
Q2302 E-4
TP820 F-4
Q2303 E-4
TP844 F-1
Q2501 E-5
TP2323 D-5
Q2502 E-5
TP2324 D-5
Q2503 E-5
TP2331 E-4
Q2513 E-4
TP2332 E-4
Q2514 D-4
TP2333 D-5
Q2515 E-4
2 TP2334 D-5
1
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
A-BOARD TNPA0529 A-BOARD TNPA0529
A B C D E F G
B-BOARD (COMPONENT SIDE) V-BOARD (COMPONENT SIDE)
6 TXN/B10HGK TNPA2772
P
K
B
H
5 V
H-BOARD (COMPONENT SIDE)
TNPA2774
4
K-BOARD (COMPONENT SIDE)
TNPA2773
3
P-BOARD (COMPONENT SIDE)
2 TNPA2770
Parts Location
P-BOARD (COMPONENT SIDE)
IC TRANSISTOR
IC601 C-2 Q609 C-1
IC602 C-1 Q612 C-1
Q614 D-1
Q615 D-1
Q616 C-2
1 Q617 C-2
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
B-BOARD TXN/B10HGK H-BOARD TNPA2774 K-BOARD TNPA2773 B-BOARD TXN/B10HGK H-BOARD TNPA2774 K-BOARD TNPA2773
P-BOARD TNPA2770 V-BOARD TNPA2772 P-BOARD TNPA2770 V-BOARD TNPA2772
A B C D E F G
B-BOARD (FOIL SIDE) V-BOARD (FOIL SIDE)
6 TXN/B10HGK TNPA2772
P
K
B
H
5
V
H-BOARD (FOIL SIDE)
TNPA2774
4
K-BOARD (FOIL SIDE)
TNPA2773
3
P-BOARD (FOIL SIDE)
2 TNPA2770
Parts Location
P-BOARD (FOIL SIDE)
TRANSISTOR TP
Q601 C-2 TP601 E-2
Q602 C-2 TP602 E-1
Q603 C-2 TP603 A-1
Q604 C-2 TP604 A-1
Q605 C-1 TP605 E-1
Q606 B-2 TP606 A-2
Q607 C-1
Q608 E-1
1 Q610 C-1
Q611 B-2
Q613 C-1
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
B-BOARD TXN/B10HGK H-BOARD TNPA2774 K-BOARD TNPA2773 B-BOARD TXN/B10HGK H-BOARD TNPA2774 K-BOARD TNPA2773
P-BOARD TNPA2770 V-BOARD TNPA2772 P-BOARD TNPA2770 V-BOARD TNPA2772
A B C D E F G
DG-BOARD (COMPONENT SIDE)
6 TXNDG10HGK
DG
5
4
Parts Location
DG-BOARD (COMPONENT SIDE)
IC TP
IC1002 E-3 TP6001 A-4
IC1005 G-2 TP6002 B-4
IC1006 G-1 TP6003 A-3
IC1007 E-2 TP6004 B-3
IC1008 E-2 TP6005 A-4
IC3002 D-3 TP9503 E-5
IC6001 B-4 TP9504 D-5
IC6302 B-2 TP9505 D-5
3 IC6307 C-3
IC9001 D-4
IC9502 C-4
IC9505 C-4
TRANSISTOR
Q1010 G-2
Q6001 D-5
Q6002 D-5
Q6003 D-5
Q9502 C-5
Q9503 C-5
Q9504 C-5
2
1
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
DG-BOARD TXNDG10HGK DG-BOARD TXNDG10HGK
A B C D E F G
DG-BOARD (FOIL SIDE)
6 TXNDG10HGK
DG
5
4 Parts Location
DG-BOARD (FOIL SIDE)
IC Q908 F-4
Q909 F-4
IC901 G-4
Q1001 C-2
IC905 F-5
Q1002 C-2
IC906 F-5
Q1003 C-4
IC907 F-6
Q1004 C-3
IC908 G-5
Q1005 C-4
IC909 F-5
Q1006 B-4
IC910 F-5
Q1007 C-4
IC1001 A-4
Q1008 B-3
IC1003 A-3
Q1009 B-4
IC1004 B-4
3 IC1009 A-5
Q1011 C-2
Q1012 C-2
IC3001 E-2
Q1013 C-3
IC3003 D-2
Q3001 D-2
IC3004 C-2
Q3002 D-2
IC6002 G-3
Q6301 D-3
IC6301 E-3
Q6302 D-3
IC6303 E-3
Q6303 E-3
IC6304 E-2
Q6304 C-1
IC6305 F-2
Q9001 D-4
IC6306 F-2
Q9002 D-5
IC9501 E-3
Q9003 C-4
IC9503 D-4
Q9004 D-3
IC9504 D-4
Q9501 D-4
TRANSISTOR Q9505 E-5
2 Q9506 E-5
Q901 G-5 Q9507 E-5
Q902 E-5
Q903 G-4 TP
Q904 G-4 TP9058 F-4
Q905 F-5 TP9506 F-4
Q906 F-5 TP9507 F-4
Q907 G-5
1
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
DG-BOARD TXNDG10HGK DG-BOARD TXNDG10HGK
A B C D E F G
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
A-Board (1 of 4) Schematic Diagram A-Board (1 of 4) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
A-Board (2 of 4) Schematic Diagram A-Board (2 of 4) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
A-Board (3 of 4) Schematic Diagram A-Board (3 of 4) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
A-Board (4 of 4) Schematic Diagram A-Board (4 of 4) Schematic Diagram
TX-15LT2M/Q/T/X/Z B,H,K,and V-Board Schematic Diagram TX-15LT2M/Q/T/X/Z B,H,K,and V-Board Schematic Diagram
TX-15LT2M/Q/T/X/Z DG-Board (1 of 5) Schematic Diagram TX-15LT2M/Q/T/X/Z DG-Board (1 of 5) Schematic Diagram
TX-15LT2M/Q/T/X/Z DG-Board (2 of 5) Schematic Diagram TX-15LT2M/Q/T/X/Z DG-Board (2 of 5) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
DG-Board (3 of 5) Schematic Diagram DG-Board (3 of 5) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
DG-Board (4 of 5) Schematic Diagram DG-Board (4 of 5) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
DG-Board (5 of 5) Schematic Diagram DG-Board (5 of 5) Schematic Diagram
TX-15LT2M/Q/T/X/Z TX-15LT2M/Q/T/X/Z
P-Board Schematic Diagram P-Board Schematic Diagram
11 Block and Schematic Diagrams
11.1. Schematic Diagram Notes
Important Safety Notice
Components identified by mark have special characteristics important for safety.
When replacing any of these components, use only manufacture's specified parts.
Notes:
1. Resistor
All resistors are cabon 1/4W resistor, unless marked as follows:
Unit of resistance is OHM [W] (K=1,000, M=1,000,000).
: Nonflammable : Metal Oxide
: Solid : Metal Film
: Wire Wound : Fuse:
2. Capacitor
All capacitors are ceramic 50V capacitor, unless marked as follows:
Unit of capacitance is mF, unless otherwise noted.
+
-
: Temperature Compensation : Electrolytic
NP
M : Polyester : Bipolar
m : Metalized Polyester T : Dipped Tantalum
: Polypropylene Z : Z-Type
3. Coil
Unit of inductance is mF, unless otherwise noted.
4. Test Point
: Test Point position
5. Earth Symbol
: Chassis Earth (Cold) : Line Earth (Hot)
6. Voltage Measurement
Voltage is measured by a DC voltmeter.
Conditions of the measurement are the following:
Power Source ................................................... AC 100-240V, 50/60Hz
Receiving Signal ............................................... Colour Bar signal (RF)
All customer's controls ...................................... Maximum positions
7. Number in red circle indicates waveform nember.
(See waveform pattern table.)
8. When arrow mark ( ) is found, connection is easily found from the direction of arrow
9. Indicates the major signal flow. : Video Audio
10. This schematic diagram is the latest at the time of printing and subject to change without
notice.
TX-15LT2M/Q/T/X/Z
Schematic Diagram Notes
29
Remarks:
1. The Power Circuit contains a circuit area which uses a separate power supply to isolate the
earth connection.
The circuit is defined by HOT and COLD indications in the schematic diagram. Take the
follwing precautions.
All circuits, except the Power Circuit, are cold.
Precautions
a. Do not touch the hot part or the hot and cold parts at the same time or you may
be shocked.
b. Do not short- circuit the hot and cold circuits or a fuse may blow and parts may
break.
c. Do not connect an instrument, such as an oscilloscope, to the hot and cold
circuits simultaneously or a fuse may blow.
Connect the earth of instruments to the earth connection of the circuit being
measured.
d. Make sure to disco