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SERVICE MANUAL
LM CHASSIS
CONTENTS PAGE
Safety Instructions 3
Technical Specifications 4
Features 5
Inputs/Outputs Diagram 6
Remote Control 7
Set Apperance 8
Service Adjustments 9
Block Diagram 12
Power Supply Diagram 13
Data Sheet VCT4993 14
Data Sheet MST6181 16
Data Sheet MTV512 24
Data Sheet TVP5150A 26
Parts List 32
Circuit Diagram Attached
SAFETY PRECAUTIONS
GENERAL GUIDELINES
1. Always use the manufacturer's replacement safety
components. The critical safety components marked 5 High temperature & high humidity
with on the schematics diagrams should not be reduce the life-time.
by other substitutes. Other substitute may create the LCD is not proper to be used at high temperature
electrical shock , fire or other hazards. Take and high humidity. Please keep specified
attention to replace the spacers with the originals. temperature and humidity condition.
Furthermore where a short circuit has occurred ,
replace those components that indicate evidence of 6- Keep out of Corrosive Gas.
overheating.
Corrosive gas effect the polarizer and the circuit
2. After servicing , see that all the protective devices chemically and cause defects accordingly.
such as insulation barriers, insulation papers, shields
and isolation R-C combinations are correctly 7 - Electrostatic discharge can make
installed.
Damage
3. When the receiver is not being used for a long time
of period of time , unplug the power cord of the There are electro-static sensitive components such
Adaptor from the AC outlet. as CMOS in LCD Module. Please earth human
body when handle the LCD.In addition, please do
not touch the interface connector pin with bare.
Color TFT LCD Module is very sensitive
both electrically and physically.Users,
therefore, are requested to follow the 8- Do not operate for a long time under
the same pattern
"Guidance of handling color TFT LCD
Module"on the followings.
Operating LCD for a long time under the same
pattern can cause image persistence and can
1- Be careful not to make scratch on the damage it. Please follow following guidance.
polarizer. 1. Turn the power off when do not use.
Surface of polarizer is soft and can be physically 2. Change the pattern periodically.
damaged easily.
Please do not touch, push or rub polarizer surface
with materials over HB hardness.
2- Keep clean the surface.
Please wear rubber glove when touch the surface of
LCD screen. Please use soft and anti-static material
as cleaner.
3- Keep out of water.
Water on/in the LCD may cause electrical short or
corrosion. Please wipe out dry or water carefully.
4- Prevent swift Temperature &
Humidity change.
Instantaneous temperature and/or humidity change
can make dew or ice which cause nonconformance
such as malfunction.
Technical specifications chart
Picture tube 27" 16:9
size/type active matrix TFT
Sound outlet
2x7 W
power (10% THD)
Power
120 W
consumption
Stand-by Power 1W
consumption
General technical specifications
Power supply
AC: ............................................................................230V~50 Hz
Program memory: ...................................................100
RF Antenna input: ...................................................75 Ohm (Co-axial)
Loudspeaker impedance: ......................................4 Ohm
Sound systems:.......................................................Mono/Stereo/Nicam
Batteries: ..................................................................2xUM - 4, IEC R03 or AAA 1.5V
Received channels: .................................................VHF (Band I channel 2-4)
..................................................................................VHF (Band III channel 5-12)
..................................................................................UHF (Channel 21-69)
..................................................................................Cable TV (S1-S20/S21-S41)
Received broadcasting systems............................PAL BG
PAL SECAM BG
PA L S E C A M B G D K / D K '
PAL SECAM BG LL'
PAL I
Note: Your television has been manufactured in accordance with your country by selecting from
among the above mentioned broadcasting systems and this system cannot be changed by the user
except the case described below: In countries where BG/DK and BG/LL' broadcasts are done (BG
or DK / BG and LL'). For further information, see the settings part about your television.
4
Your Television
Features