Safety Precautions - Mitsubishi Electric LT-52151 Service Manual

Vlp41/vlp41+/vlp41++ chassis, lcd flat panel television

Hide thumbs Also See for LT-52151:

Owner's manual (94 pages)

Owner's manual (40 pages)

Owner's manual (96 pages)

Table Of Contents

Table of Contents

MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249

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

scattered. 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. The fluorescent tubes in the panel contain mercury that is toxic and if broken should not be touched.

6. 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

Industries 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. Repeat the current measurements of items 1 and 2 after the receiver has

reached thermal stabilization. The leakage current must not exceed 0.5 milliampere (mA).

GWG - Green Wire Ground

(Earth Ground)