Haier HTX21S31, Service Manual

 4 

4.

 Safety Precautions

SAFETY PRECAUTIONS 

IMPORTANT SAFETY NOTICE 

Many electrical identify these parts and mechanical parts in this chassis have special safety-related 
characteristics!

In the Schematic Diagram and Replacement Parts List. 

It is essential that these special safety parts should be replaced with the same components as 
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. 

Do not modify the original design without permission of the manufacturer. 

General Guidance 

An Isolation Transformer should always be used during the servicing of a receiver whose chassis is 
not isolated from the AC power line. Use a transformer of adequate power rating as this protects the 
technician from accidents that might result in personal injury caused by electrical shocks. 

It will also protect the receiver and it’s components from being damaged by accidental shorts of the 
circuitry that might be inadvertently introduced during the service operation.   

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with a specified one. 

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 
10mm away from PCB. 

Keep wires away from high voltage or high temperature parts. 

Due to the high vacuum and large surface area of the picture tube, extreme care should be taken in 
handling the Picture Tube. Do not lift the Picture Tube by its Neck. 

X-RAY Radiation 

Warning:  

The source of X-RAY RADIATION in this TV receiver is the High Voltage Section and the Picture 
Tube. 

For continued X-RAY RADIATION protection, the replacement tube must be of the same type as 
specified in the Replacement Parts List. 

Before returning the receiver to the customer, 

Always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as 
antennas, terminals, etc., to make sure that the set is safe to operate without any danger of electrical 
shock. 

Safety Precautions