26LT673H (CHASSIS:LA2AM) - LG TV Service Manual (repair manual). Page 11

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8. AUDIO output check
8.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
(3) RGB PC: 1KHz sine wave signal (0.7Vrms)
8.2. Specification
No
Item
Min
Typ
Max
Unit
Remark
1. Audio practical 
max Output, L/R
(Distortion=10% 
max Output)
9.0
10.0 12
W
Measurement 
condition
EQ Off
AVL Off
Clear Voice Off
DRC operation 
under 12W
(32/37/42
LT673H 
serise)
8.5
8.9
9.8
Vrms
2. Speaker 
(8Ω Impedance)
10.0 14.0 W
Measurement 
condition
EQ On
AVL On
Clear Voice On
3. Audio practical 
max Output, L/R
(Distortion=10% 
max Output)
4
5
6.3
W
Measurement 
condition
EQ Off
AVL Off
Clear Voice Off
DRC op-
eration under 
7W(26LT673H 
serise)
5.7
6.4
7
Vrms
4. Speaker 
(8Ω Impedance)
5
7
W
Measurement 
condition
EQ On
AVL On
Clear Voice On
● Measurement condition:
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal 0.4Vrms
(3) RGB PC: 1KHz sine wave signal 0.7Vrms
9. USB S/W Download 
    (optional, Service only)
(1) Put the USB Stick to the USB socket 
(2) Automatically detecting update file in USB Stick
  -  If  your  downloaded  program  version  in  USB  Stick  is  lower 
than  that  of TV  set,  it  didn’t  work.  Otherwise  USB  data  is 
automatically detected.
(3) Show the message “Copying files from memory”
(5) Updating Completed, The TV will restart automatically
(6)  If  your TV  is  turned  on,  check  your  updated  version  and 
Tool option. 
*  If downloading version is more high than your TV have, TV 
can lost all channel data. In this case, you have to channel 
recover. If all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
* After downloading, TOOL OPTION setting is needed again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each model has their number.)
(4) Updating is staring.

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