LG 32LH70 (CHASSIS:LA92D) Service Manual ▷ View online
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5.6. Bluetooth
5.7. Ship-out mode check (In-stop)
• After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode.
• After final inspection, Always turn on the Mechanical S/W.
6.1. Method
- Check that Power Cord is fully inserted to the SET.
(If loose, re-insert)
- Unit fully inserted Power cord, Antenna cable and A/V
arrive to the auto-check process.
- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
(Remove CORD, A/V form AV JACK BOX)
- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
pallet to move on to next process.
6.2. Checkpoint
• TEST voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
• TEST time: 1 second
• TEST POINT
• TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
NEUTRAL
• LEAKAGE CURRENT: At 0.5mArms
Green Eye-Check
Sensor Data:
1
Backlight: 0
O.K
Green Eye-Check
Sensor Data: 215
Backli ght : 100
[step2]
[step5]
[step6]
[step3]
[step4]
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TROUBLESHOOTING
1. TV/CATV doesn’t display
2. DTV doesn’t display
Check the output data of IC100 in the Jack
Board Pin52.
Can you see the normal signal?
NO
Could you measure voltage of IC100 in the
Jack Board & IIC lines?
Are they all normal?
NO
You should check power line
& IIC lines.
YES
You should replace Jack Board.
YES
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
Check the output of TR Q100, Q103
in the Jack Board.
Can you see the normal waveform?
YES
NO
You should decide to replace TR Q100, Q103
in the Jack Board or not.
Check IC100 in the Jack Board.
Can you see t he normal signal?
Check the output of TRQ102 in th e Jack
Board.
Can you see t he normal wavefo rm?
Check the output of Main IC(IC100).
Esp ecially you sh ould ch eck
The H,V sync and cloc k.
Can you see t he normal wavefo rm?
YES
YES
NO
Could you measu re voltag e of IC100 in the
Jack Bo ard & IIC lin es?
Are they all normal?
YES
NO
You sh ou ld check power line
& IIC li nes.
YES
You should rep lace Jack Board .
NO
You sh ou ld decide to rep lace
TR Q102 in the Jack Board or not.
NO
After checking th e Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has b ig problem becau se Main
IC(IC100) have some troubles.
Afte r checking thoroughly all path once again,
You sh ou ld decid e to rep lace Main Bo ard or not.
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3. AV 1/2 doesn’t display
Check JK200 in the Jack Board.
Can you see the normal waveform?
NO
JK200 may have problem. Replace this Jack.
Check the input of A/V Audio switch
(IC405 in the Jack Board),
Can you see the normal waveform?
YES
NO
After checking the Power of A/V Audio switch,
You should decide to replace component
Audio switch or not
YES
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
YES
Check the output of A/V Audio switch
(IC405 in the Jack Board),
Can you see the normal waveform?
NO
After checking the Power of A/V Audio switch,
You should decide to replace component
Audio switch or not
4. Component doesn’t display
Check JK200
Can you see the normal waveform?
Check the input of Component Audio
switch(IC405 in the Jack Board) ,
Can you see the normal waveform?
Check the output of Component Audio
switch(IC405 in the Jack Board) ,
Can you see the normal waveform?
YES
YES
YES
NO
JK200
may have problem. Replace this Jack.
NO
After checking the Power of component Audio
switch, you should decide to replace component
Audio switch or not.
NO
After checking the Power of component Audio
switch you should decide to replace component
Audio switch or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
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5. RGB PC doesn’t display
Check JK203,
Can you see the normal waveform?
NO
JK203
may have problem. Replace this Jack.
Check the input of RGB Audio
switch(IC405 in the Jack Board) ,
Can you see the normal waveform?
Check the output of RGB Audio
switch(IC405 in the Jack Board) ,
Can you see the normal waveform?
YES
YES
NO
After checking the Power of RGB Audio switch,
you should decide to replace RGB Audio switch
or not.
NO
After checking the Power of RGB Audio switch
you should decide to replace RGB Audio switch
or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
YES
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