Parker TLU248HB Schematic
LCD
TLU248HB
CONTENT
7cm
PARTS LIST
MODEL PART NUMBER DESCRIPTION SPECIFICATIONPHOTO
Caution.................................................................................................2
Technical Specifications.......................................................................6
Circuit Diagram...................................................................................14
Exploded View....................................................................................26
Parts List ............................................................................................30
Note: This manual is the latest at the time of printing,and does not
include the modification which may be made after the printing, by the
constant improvement of product.
TLU248HB
PK-TLU-248-RM-HB
PK-TLU-248-MB-HB
PK-TLU-248-PW-HB POWER BOARD LS2402003 VER1.0
PK-TLU-248-KEYB-HB
PK-TLU-248-TCW-HB
PK-TLU-248-SPK-HB
PK-TLU-248-RCB-HB
4cm
REMOTE CONTROL REMOTE CONTROL
MAIN BOARD
KEYBOARD
T.COM, WIRE
(LVDS)27PIN
SPEAKER
4 X 7 cm
RECEIVER BOARD
CLAA215FA01
MT8223.2A
T15.022011-00R
T.COM, WIRE (LVDS)27PIN
4Ώ / 5W
T15.035011-02R
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The lightning flash with arrowhead symbol, within an equi-
lateral triangle, is intended to
alert the user to the presence of uninsulated “dangerous
voltage” within the product’s enclo sure that may be of
sufficient magnitude to constitute a risk of electric shock to
persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
PRECAUTIONS DURING SERVICING
1. In addition to safety, other parts and assemblies are specified for
conformance with such regulations as those applying to spurious
radiation. These must also be replaced only with specified replacements.
Examples: RF converters, tuner units, antenna selection switches,
RF cables, noise-blocking capacitors, noise-blocking filters, etc.
2. Use specified internal Wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
3. Use specified insulating materials for hazardous live parts. Note
especially:
1) Insulating Tape
2) PVC tubing
3) Spacers (insulating barriers)
4) Insulating sheets for transistors
5) Plastic screws for fixing micro switches
4. When replacing AC primary side components(transformers, power
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cords, noise blocking capacitors, etc.), wrap ends of wires securely
about the terminals before soldering.
5. Make sure that wires do not contact heat generating parts (heat
sinks, oxide metal film resistors, fusible resistors, etc.)
6. Check if replaced wires do not contact sharply edged or pointed
parts.
7. Make sure that foreign objects (screws, solder droplets, etc.) do not
remain inside the set.
MAKE YOUR CONTRIBUTION TO PROTECT THE ENVIRONMENT
Used batteries with the ISO symbol
for recycling as well as small accumulators(rechargeable batteries),
mini-batteries (cells) and starter batteries should not be thrown into the
garbage can.
Please leave them at an appropriate depot.
WARNING:
Before servicing this TV receiver, read the SAFETY INSTRUCTION
and PRODUCT AFETY NOTICE.
SAFETY INSTRUCTION
The service should not be attempted by anyone unfamiliar with the
necessary instructions on this apparatus. The following are the necessary instructions to be observed before servicing.
1. An isolation transformer should be connected in the power line
between the receiver and the AC line when a service is performed
on the primary of the converter transformer of the set.
2. Comply with all caution and safety related provided on the back of
the cabinet, inside the cabinet, on the chassis or LCD panel.
3. When replacing a MAIN PCB in the cabinet,always be certain that
all protective are installed properly such as control
knobs,adjustment covers or shields, barriers, isolation resistor
networks etc.
4. When servicing is required, observe the original lead dressing. Extra
precaution should be given to assure correct lead dressing in the
high voltage area.
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5. Keep wires away from high voltage or high tempera ture components.
6. Before returning the set to the customer,always perform an AC
leakage current check on the exposed metallic parts of the
cabinet,such as antennas, terminals,screwheads, metal overlay,
control shafts, etc., to be sure the set is safe to operate without
danger of electrical shock. Plug the AC line cord directly to the AC
outlet (do not use a line isolation transformer during this check). Use
an AC voltmeter having 5K ohms volt sensitivity or more in the
following manner.
Connect a 1.5K ohm 10 watt resistor paralleled by a 0.15μF AC type
capacitor, between a good earth ground (water pipe, conductor
etc.,)and the exposed metallic parts, one at a time.Measure the AC
voltage across the combination of the 1.5K ohm resistor and 0.15
uF capacitor. Reverse the AC plug at the AC outlet and repeat the
AC voltage measurements for each exposed metallic part.The measured voltage must not exceed 0.3V RMS.
This corresponds to 0.5mA AC. Any value exceeding this limit
constitutes a potential shock hazard and must be corrected immediately.
The resistance measurement should be done between accessible
exposed metal parts and power cord plug prongs with the power
switch "ON". The resistance should be more than 6M ohms.
TLU248HB
PRODU
CT S AFETY NOTICE
Many electrical and mechanical parts in this apparatus have special
safety-related characteristics.
These characteristics are offer passed unnoticed by visual spection
and the protection afforded by them cannot necessarily be obtained by
using replacement components rates for a higher voltage, wattage, etc.
The replacement parts which have these special safety characteristics
27
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