55LV4400 LC550EUH-RDA2-8R1 - LG TV Service Manual (repair manual). Page 7

CONFIDENTIAL – DO NOT COPY 

Page 2-4

File No. SG-0000039

 

 

 

9-2. Operating Precautions 
(1) The spike noise causes the mis-operation of circuits. It should be lower than 

following voltage: 
V=±200mV (Over and under shoot voltage) 

(2) Response time depends on the temperature. (In lower temperature, it 

becomes longer.) 

(3) Brightness depends on the temperature. (In lower temperature, it becomes 

lower.) And in lower temperature, response time(required time that brightness 
is stable after turned on) becomes longer. 

(4) Be careful for condensation at sudden temperature change. Condensation 

makes damage to polarizer or electrical contacted parts. And after fading 
condensation, smearor spot will occur. 

(5) When fixed patterns are displayed for a long time, remnant image is likely to 

occur. 

(6) Module has high frequency circuits. Sufficient suppression to the 

electromagnetic interference shall be done by system manufacturers. 
Grounding and shielding methods may be important to minimized the 
interference. 

(7) Please do not give any mechanical and/or acoustical impact to LCM. 

Otherwise, LCM can’t be operated its full characteristics perfectly. 

(8) A screw which is fastened up the steels should be a machine screw. (if not, it 

causes metallic foreign material and deal LCM afatal blow) 

(9) Please do not set LCD on its edge. 
 

9-3. Electrostatic Discharge Control 
Since a module is composed of electronic circuits, it is not strong to electrostatic 
discharge. Make certain that treatment persons are connected to ground through 
wrist band etc. And don’t touch interface pin directly. 
 

9-4. Precautions for Strong Light Exposure 
Strong light exposure causes degradation of polarizer and color filter.