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LCD TELEVISION
LC-32KU63
CONTENTS
Safety precautions...........................................................................1
Alignment instructions.......................................................................3
Software upgrade method..................................................................8
Block diagram.................................................................................10
IC block diagram..............................................................................11
Troubleshooting guide.......................................................................12
Schematic diagram...........................................................................20
APPENDIX-A: Assembly list
APPENDIX-B: Exploded view
Attention: This service manual is only for service personnel to take reference with. Before
servicing please read the following points carefully.
Safety precautions
1. Instructions
Be sure to switch off the power supply before replacing or welding any components or
inserting/plugging in connection wire Anti static measures to be taken (throughout the entire
production process!):
a) Do not touch here and there by hand at will;
b) Be sure to use anti static electric iron;
c) It's a must for the welder to wear anti static gloves.
Please refer to the detailed list before replacing components that have special safety
requirements. Do not change the specs and type at will.
2. Points for attention in servicing of LCD
2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to
use the screen of the original model for replacement.
2.2 The operation voltage of LCD screen is 700-825V. Be sure to take proper measures in
protecting yourself and the machine when testing the system in the course of normal operation or
right after the power is switched off. Please do not touch the circuit or the metal part of the module
that is in operation mode. Relevant operation is possible only one minute after the power is
switched off.
2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or
damage to the set.
2.4 Never operate the set or do any installation work in bad environment such as wet bathroom,
laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc.
Otherwise bad effect will result.
2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into
the module, be sure to cut the power off immediately and do not move anything on the module lest
it should cause fire or electric shock due to contact with the high voltage or short circuit.
2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off
at once. Likewise, if the screen is not working after the power is on or in the course of operation,
the power must be cut off immediately and no more operation is allowed under the same
condition.
2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the
power is off because in this case relatively high voltage still remains in the capacitor of the driving
circuit. Please wait at least one minute before the pulling out or plugging in the connection wire.
2.8 When operating or installing LCD please don't subject the LCD components to bending,
twisting or extrusion, collision lest mishap should result.
2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it's necessary
to pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and
ensure full grounding for all the parts that have to be grounded.
2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or
moving the set please take care not to touch or scratch them. Once they are damaged the screen
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would be unable to work and no way to get it repaired.
If the connection wires, connections or components fixed by the thermotropic glue need to
disengage when service, please soak the thermotropic glue into the alcohol and then pull them
out in case of dagmage.
2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead
to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong
case before the transportation or handling.
2.12 For the storage make sure to put it in a place where the environment can be controlled so as
to prevent the temperature and humidity from exceeding the limits as specified in the manual. For
prolonged storage, it is necessary to house it in an anti-moisture bag and put them altogether in
one place. The ambient conditions are tabulated as follows:
Temperature Scope for operation 0 ~ +50 oC
Scope for storage -20 ~ +60 oC
Humidity Scope for operation 20% ~ 85%
Scope for storage 10% ~ 90%
2.13 Display of a fixed picture for a long time may result in appearance of picture residue on the
screen, as commonly called "ghost shadow". The extent of the residual picture varies with the
maker of LCD screen. This phenomenon doesn't represent failure. This "ghost shadow" may
remain in the picture for a period of time (several minutes). But when operating it please avoid
displaying still picture in high brightness for a long time.
3. Points for attention during installation
3.1 The front panel of LCD screen is of glass. When installing it please make sure to put it in
place.
3.2 For service or installation it's necessary to use specified screw lest it should damage the
screen.
3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between
the screen and the glass will affect the receiving and viewing effect
3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and
insulation please take care to keep it in intactness so as to avoid hidden trouble.
3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or
mounting.
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Alignment Instructions
1. Alignment equipments
Digital Multimeter
Signal Generator (54200)
Personal Computer (FLASH writing tool pre-installed)
VG848 & VG849 (VGA, YPbPr, HDMI signal generator)
DVD player with HDMI jack
CA210 (white balancer)
Monitor
2. Power voltage test and alignment flow chart
2.1 Power voltage test
According to wiring diagram connect all boards correctly. Connect power and press POWER button
to turn on the TV.
a) In turn measure XJ01 all pin voltage. The data is shown below (Table 1).
Table 1: XJ01 all pin voltage
XJ01 Pin1 2 3 45 67 8 9 10 11 12 13
Voltage >2.5 V 03.3 V 0 11.4 V12.6 V 0 31.4 V32.6 V 4.75 V5.25 V 0 4.75 V5.25 V 0 >2.5 V
b) In turn measure XV04 all pin voltage, the data is shown below (Table 2).
Table 2 XV04 all pin voltage
XV04 Pin1 2 3 4 5
Voltage 22.8 V25.2 V 22.8 V25.2 V 0 0 0
2.2 Alignment flow chart (Fig.1)
Check if DDC, FLASH, KEY is written
Data process board making
Complete set alignment
White balance alignment
Input signal and check all TV function (no lost program, analog
control be normal). Check earphone and speaker output is normal.
Check if AV/SVIDEO/SCART input is normal
Check if YPbPr input is normal
Check if VGA input is normal. Check VGA mode analog control, H/V-center, etc.
Check if HDMI input is normal. Check all the function at this mode.
Defaults preset
Check accessory, then pack the TV
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3. Alignment instructions
3.1 Complete set alignment
3.1.1 According to wiring diagram connect all boards correctly. Power on the TV, check if the display
is normal.
3.1.2 Factory menu usage
a) First press "INPUT" button, then in turn press "2580" to access factory main menu.
b) Press " " and " " to select item, then press " " to access.
c) Press " " and " " to move upward or downward and select item.
d) Press " " and " " to adjust.
e) Press "MENU" to return to the previous screen.
3.2 White balance adjustment
3.2.1 Preparations before adjustment
Before white balance adjustment, let the TV work for more than 30 minutes so the TV will be in
stable status. Then use white balancer CA210 to adjust.
a) When adjusting in VGA mode, input VESA800