42PQ3500-ZB (CHASSIS:PD91A) - LG TV Service Manual (repair manual). Page 10

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<Notice> Module Heat-Run Condition for W/B
1.  The  adjustment  must  be  performed  in  the  circumstance  of
25±5°C  of  temperature  and  65±10%  of  relative  humidity  if
there is no any specifics.
2.  Before  an  W/B  adjustment,  the  module  which  will  be  used
should  be  placed  in  the  circumstance  of  15°C~25°C  for
above 2 hours.
3. If a module was placed in the circumstance of below 15°C,
it  should  be  placed  in  the  circumstance  of  15°C~25°C  for
above  2  hours  or  be  run  for  above  5  minutes  in  an  aging
environment of 60°C.
4.  Before  an  W/B  adjustment,  TV  set  should  be  run  for  5
minutes at least.
10. Serial Number Download
10-1. Download Procedure
(1)  Press  “Power  on”  button  of  a  service  R/C.(Baud  rate  :
115200 bps)
(2) Connect RS232-C Signal Cable.
(3) Write Serial number through RS-232C.
(4)  Check  the  serial  number  at  the  Diagnostics  of  ‘SETUP’
menu. (Refer to below).
10-2. Signal TABLE
CMD
: A0h 
LENGTH : 85~94h (1~16 bytes)
ADH
: EEPROM Sub Address high (00~1F)
ADL
: EEPROM Sub Address low (00~FF)
Data
: Write data
CS
: CMD + LENGTH + ADH + ADL + Data_1 + ... + 
Data_n
Delay
: 20ms
10-3. Command Set
[Description]
FOS Default write : <7mode data> write
Vtotal,  V_Frequency,  Sync_Polarity,  Htotal,  Hstart,  Vstart,
0, Phase
Data  write  :  Model  Name  and  Serial  Number  write  in
EEPROM,.
11. Check Information 
(Serial No. & Model name)
(1) Push the menu button in DTV mode.
(2) Select the SETUP -> Diagnostics -> To set
(3) Check the Serial Number
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