Including TV Stand20.2 “ × 18.1 “ × 10.2 “ (514 mm × 459 mm × 259 mm) (TC-19LX50, TC-19LE50)
24.1 “ × 19.9 “ ×10.2 “ (612 mm × 505 mm × 259 mm) (TC-23LX50, TC-23LE50)
TV Set Only20.2 “ × 15.6 “ ×4.9 “ (514 mm × 395 mm × 125 mm) (TC-19LX50, TC-19LE50)
24.1 “× 17.4 “ ×4.9 “ (612 mm × 441 mm × 125 mm) (TC-23LX50, TC-23LE50)
Mass (Weight)8.5 kg (18.7 lb.) NET (TC-19LX50, TC-19LE50)
9.5 kg (20.9 lb.) NET (TC-23LX50, TC-23LE50)
Note:
Design and Specifications are subject to change without notice. Weight and Dimensions shown are approximate.
CONTENTS
Page Page
1 Safety Precautions 3
1.1. General Guidelines
2 Warning
2.1. Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
2.2. About lead free solder (PbF)
3 Location of Controls and Components
4 Service Mode
4.1. How to enter into adjustment mode
4.2. Cancellation
4.3. Contents of adjustment mode
5 Troubleshooting Guide
5.1. Self-check function
6 Disassembly and Assembly Instructions
6.1. Removing the hinge cover
6.2. Removing the pedestal
6.3. Removing the back cover (TC-23LX50/LE50)
6.4. Removing the back cover (TC-19LX50/LE50)
6.5. Removing the tuner cover
6.6. Removing the shield cover
6.7. Removing the button panel and K-board
6.8. Removing the chassis
6.9. Removing the A-Board, AP-Board and Power Unit
6.10. Removing the speaker, and V-Board
6.11. Removing the LCD mount metal
6.12. Removing the LCD panel (TC-23LX50/LE50)
6.13. Removing the LCD panel (TC-19LX50/LE50)
6.14. Removing the LCD fixing metal
6.15. Location of Lead Wiring
7 Measurements and Adjustments
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7.1. Video Signal Level Adjustment (RF)
8 Block Diagram
8.1. Block Diagram (1 of 3)
8.2. Block Diagram (2 of 3)
8.3. Block Diagram (3 of 3)
9 Wiring Connection Diagram
10 Schematic Diagrams
10.1. Schematic Diagram Notes
10.2. A-Board (1 of 6) Schematic Diagram
10.3. A-Board (2 of 6) Schematic Diagram
10.4. A-Board (3 of 6) Schematic Diagram
10.5. A-Board (4 of 6) Schematic Diagram
10.6. A-Board (5 of 6) Schematic Diagram
10.7. A-Board (6 of 6) Schematic Diagram
10.8. AP-Board Schematic Diagram
10.9. K-Board and V-Board Schematic Diagram
11 Printed Circuit Views
11.1. A-Board
11.2. AP-Board
11.3. K-Board and V-Board
12 Exploded View and Replacement Parts List
12.1. Parts Layout
12.2. Packing Exploded Views
12.3. Mechanical Replacement Parts List
13 Electrical Parts List
13.1. Electrical Parts List Notes
13.2. Electrical Replacement Parts List
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2
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
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).
2.2. 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 Copper (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
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.
stamped on the back of PCB.
4
http://getMANUAL.com
3 Location of Controls and Components
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
Board NameFunction
A-BoardMain (AV Switch, Audio, MCU, Grobal Core, AV connector )
V-BoardRemote Reciever
K-BoardPower switch, Control swtich
AP-BoardDC-DC
Power UnitPower (AC/DC),
None serviceable.
Power Unit should be exchange for service.
5
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
4 Service Mode
4.1. How to enter into adjustment mode
While pressing [VOLUME-] button of the main unit, press [RECALL] button of the remote control three times in a row (within 2
seconds).
4.1.1. Adjustment method.....Use the remote control.
“1” button...Main items Selection in forward direction
“2” button...Main items Selection in reverse direction
“3” button...Sub items Selection in forward direction
“4” button...Sub items Selection in reverse direction
“VOL” button...Value of sub items change in forward direction (
), in reverse direction ()
4.2. Cancellation
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
4.3. Contents of adjustment mode
·Value is shown as a hexadecimal number.
·Preset value differs depending on models.
·After entering the adjustment mode, take note of the value in each item before starting adjustment.
B-CENTTest pattern (50% White) B-CENT
OPTOPT00(TV)
RMCODERemote control code A or B
MTSMTSINRF Audio input
SEPAHStereo separation Hi
SEPALStereo separation Low
6
TC-19LX50 / TC-23LX50 / TC-19LE50 / TC-23LE50
5 Troubleshooting Guide
5.1. Self-check function
When phenomena like "the power fails from time to time" or "the video/audio fails from time to time" can not be confirmed at the
time of servicing, the self-check function can be used to confirm the occurrence and to limit the scope for the defective circuits.Also,
when "the power fails from time to time", display on the screen can be used to confirm the occurrence and to limit the scope for
the defective circuits.
Any programmed channels, channels caption data and some other user defined settings will be erased and return to factory setting.
5.1.1. How to access
5.1.1.1. Access
Produce TV reception screen and, while pressing [VOLUME-] button on the main unit, press [SLEEP] button on the remote
controller unit simultaneously.
5.1.1.2. Exit
When one of the buttons for channel selection etc. is pressed, the display returns to the normal screen.