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MODELS: LT-55154 / LT-40164 / LT-46164 / LT-55164 / LT-46265 / LT-55265
GWG - Green Wire Ground
(Earth Ground)
S2
S1
OPEN
GROUND
SUPPLY CONNECTOR GROUND
RECEIVER
INSULATED TABLE
TOUCH ALL
EXPOSED
METAL PARTS
AC MA
METER
L
N
SAFETY PRECAUTIONS
NOTICE:
Observe all cautions and safety related notes located inside the receiver cabinet and on the receiver chassis.
WARNING:
1. Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard from the
receiver's power supplies. Work on the receiver should not be attempted by anyone who is not thoroughly
familiar with the precautions necessary when working on high voltage equipment.
2. Do not install, remove or handle the LCD panel in any manner unless shatterproof goggles are worn. People
not so equipped should be kept away while the panel is being handled. Keep the panel away from the body
while handling.
3. When service is required, observe the original lead dress. Where a short-circuit has occurred, replace those
components that indicate evidence of overheating.
4. If the LCD Panel is damaged, crystalline liquid may leak from the LCD panel and broken glass may be scat-
tered. The crystalline liquid is toxic. Avoid contact with your skin, eyes, or mouth. DO NOT touch the broken
glass or crystalline liquid with bare hands, as cuts, poisoning, and/or skin irritation may occur. DO NOT let
glass fragments or crystalline liquid get into your eyes or mouth. Should either contact your eyes or mouth,
rinse the contacted area thoroughly with water and consult your doctor.
5. DO NOT dispose of the TV with general household waste. Follow local laws and regulations for legal and
safe disposal of the TV. For disposal or recycling information, contact local authorities or the Electronic Indus-
tries Alliance at www.eiae.org.
Leakage current check
Before returning the receiver to the customer, it is recommended that leakage current be measured according to the
following methods.
1. Cold Check
With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug
prongs. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal part
(i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay, control shafts, etc.), particularly any
exposed metal part that has a return path to the chassis. The resistance of the exposed metal parts having a
return path to the chassis
should be a minimum of 1Meg Ohm
. Any resistance below this value indicates an
abnormal condition and requires corrective action.
2. Hot Check ...Use the circuit shown below to perform the hot check test.
1. Keep switch S1 open and connect the receiver to the measuring circuit. Immediately after connection, and
with the switching devices of the receiver in their operating positions, measure the leakage current for both
positions of switch S2.
2. Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the switching devices
of the receiver in their operating positions, measure the leakage current for both positions of switch S2. Re-
peat the current measurements of items 1 and 2 after the receiver has reached thermal stabilization.
The
leakage current must not exceed 0.5 milliamps (mA).
Summary of Contents for Unisen LT-40164
Page 2: ......
Page 51: ...Page 51 MODELS LT 55154 LT 40164 LT 46164 LT 55164 LT 46265 LT 55265 CIRCUIT BLOCK DIAGRAMS ...
Page 52: ...Page 52 MODELS LT 55154 LT 40164 LT 46164 LT 55164 LT 46265 LT 55265 ...
Page 54: ...Page 54 MODELS LT 55154 LT 40164 LT 46164 LT 55164 LT 46265 LT 55265 ...
Page 55: ...Page 55 MODELS LT 55154 LT 40164 LT 46164 LT 55164 LT 46265 LT 55265 ...
