32LP645H (CHASSIS:LA3AA) - LG TV Service Manual (repair manual). Page 16

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12. External Speaker Out
Waveform of Oscilloscope
(1)  Connect  external  speaker  to  speaker  out  port  with  phone 
jack on TV side as below
(2)  Check  the  Max.  speaker  output  is  1W  or  not.  Sine  wave 
with 1KHz will be displayed
(3) Check Both of the signal in speaker.
      (only Power -> Fived 1W Default)
     ->  Check the input signal(1KHZ, Sine wave) and the wave 
of output by utilizing oscilloscope.
13.  LAN  Main board Check 
      [Only for XXLP645H series]
13.1. Overview 
It is LNET RF modem  & FTG card
13.2. Equipment 
(1) b_LAN Checker:  UTC-1000 (with Cable accessory)
(2) Computer(for test result monitoring)
(3) Connection JIG
13.3.  Equipment connection map  &  b_LAN 
Check
  Recommended Input Signal 
  : RF, 1kHz, Sine wave 
 
 
Measuring 
point 
 
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