LG 43LX310C, Service Manual

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Only for training and service purposes
7. AUDIO output check
7.1. 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)
7.2. Specification
8. 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”
(4) Updating is staring.
(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.)
9. Test factor for commercial model
9.1. RJP TEST (Only US model)
9.1.1. Overview
▪ Jig(Commercial Check JIG)
▪ RJ45 cable
▪ Power only mode
9.1.2. Test sequence
(1) Operate JIG(Commercial Check JIG) as shown on picture1
(2) Turn on TV and press “P-ONLY” key on adjustment
remocon.
(3) Connect RJ45 cable into RJP port of the TV set.
(4) Connect RJ45 cable into the JIG.
(5) If shown “OK” it’s normal, “NG” it’s defect.
(6) If defect, check the connection once again as done above.
(7) If the signal power is no good, check the connection of RF
cable.
10. External Speaker Out
(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.
(Power only mode -> Fived 1W Default)
-> Check the input signal(1KHZ, Sine wave) and the wave
of output by utilizing oscilloscope
No Item Min Typ Max Unit Remark
1 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
9.0
8.5
10.0
8.9
12.0
9.9
W
Vrms
(1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (8Ω
Impedance)
(3) 32/37/42/47/55/60
INCH
2 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
9.0
8.5
10.0
8.9
12.0
9.9
W
Vrms
(1) Measurement
condition
- EQ/AVL/Clear
Voice: Off
(2) Speaker (8Ω
Impedance)
(3) 26 INCH
RJP port
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