LG 32LG700H (CHASSIS:LA80A) Service Manual ▷ View online
- 17 -
5. AV Video
Check JK702, JK703.
Can you see the normal waveform?
Can you see the normal waveform?
NO
JK702,JK703 may have problem. Replace this Jack.
Check the input (Pin AN17,AM19) of BCM3563(IC101).
Measure waveform at C623,C624 because it’s more easy
to check. Can you see the normal waveform?
Measure waveform at C623,C624 because it’s more easy
to check. Can you see the normal waveform?
YES
This board has big problem because Main chip(BCM3563) have some troubles.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
YES
6. Component Video
Check JK701.
Can you see the normal waveform?
Can you see the normal waveform?
JK701 may have problem. Replace this Jack.
Check the input (Pin AL21,AM21,AN21) of BCM3563(IC101).
Measure waveform at C616,C617,C618
because it’s more easy to check.
Can you see the normal waveform?
Measure waveform at C616,C617,C618
because it’s more easy to check.
Can you see the normal waveform?
This board has big problem because Main chip(BCM3563) have some troubles.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
YES
YES
NO
7. RGB-PC Video
Check JK700.
Can you see the normal waveform?
Can you see the normal waveform?
YES
JK700 may have problem. Replace this Jack.
This board has big problem because Main chip(BCM3563) have some troubles.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
YES
NO
Check the input (Pin AK16,AN15,AM15,AH16,AJ16)
of BCM3563(IC101).
Measure waveform at C613,C614,C615 and R755,R759
because it’s more easy to check.
Can you see the normal waveform?
of BCM3563(IC101).
Measure waveform at C613,C614,C615 and R755,R759
because it’s more easy to check.
Can you see the normal waveform?
8. HDMI Video
Check input connect JK600,JK601
Can you see the normal waveform?
Can you see the normal waveform?
Check DDC communication lines
(IC601, IC602)
(IC601, IC602)
Check the output of PI3HDMI341ART(IC603, IC604).
Can you see the normal waveform?
Can you see the normal waveform?
After checking the Power of this chip, you should decide to replace this or not.
Check HDCP communication lines(IC100)
After checking the Power of this chip, you should decide to replace this or not.
YES
YES
YES
NO
NO
YES
This board has big problem because Main chip(BCM3563) have some troubles.
After checking thoroughly all path once again,
You should decide to replace BCM355x or not.
After checking thoroughly all path once again,
You should decide to replace BCM355x or not.
JK600,JK601 may have problem. Replace this Jack.
NO
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9. Analog RF Audio
Check TU1001 Pin14(SIF)
Can you see the normal signal?
Can you see the normal signal?
Check the input (Pin AN23) of BCM3563((IC101).
Measure waveform at C636 because it’s more easy to check.
Can you see the normal waveform?
Measure waveform at C636 because it’s more easy to check.
Can you see the normal waveform?
YES
NO
Could you measure voltage of TU1001 & IIC lines?
Are they all normal?
Are they all normal?
NO
You should check power line
& IIC lines.
& IIC lines.
YES
You should replace TUNER.
NO
After checking audio signal line, you should decide to replace item or not.
10. AV/ Component/ RGB-PC Audio(in)
Check JK702, JK703, JK701, JK700.
Can you see the normal waveform?
Can you see the normal waveform?
NO
JK702, JK703, JK701, JK700 may have problem. Replace this Jack.
Check the input (Pin 21,22,11,12,7,8,9,10) of CS5345(IC500).
Can you see the normal waveform?
Can you see the normal waveform?
NO
YES
After checking audio signal line, you should decide to replace item or not.
YES
Check the Output (Pin 41,42,43) of CS5345(IC500).
Can you see the normal waveform?
Can you see the normal waveform?
NO
After checking the Power & MLCK & reset of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
YES
Check the input (Pin AH24,AJ24,AK24) of BCM3563((IC101).
Measure waveform at R511,R512,R525
because it’s more easy to check.
Measure waveform at R511,R512,R525
because it’s more easy to check.
Can you see the normal waveform?
NO
After checking audio signal line, you should decide to replace item or not.
11.HDMI Audio(in)
Check input connect JK600,JK601.
Can you see the normal waveform?
Can you see the normal waveform?
Check DDC communication lines.
(IC601, IC602)
(IC601, IC602)
JK600,JK601 may have problem. Replace this Jack.
Check the output of PI3HDMI341ATR(IC603, IC604).
Can you see the normal waveform?
Can you see the normal waveform?
After checking the Power of this chip, you should decide to replace this or not.
Check HDCP communication lines(IC100).
After checking the Power of this chip, you should decide to replace this or not.
YES
YES
YES
NO
NO
NO
NO
After checking the Power & Select Pin & Etc of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
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12. Audio out
Check the output (Pin AK25,AL25,AJ25) of BCM3563(IC101).
Measure waveform at R669,R670,R671 because it's more easy to check.
Can you see the normal signal?
Measure waveform at R669,R670,R671 because it's more easy to check.
Can you see the normal signal?
Check the input (Pin 17,18,19) of NTP3000((IC501).
Can you see the normal waveform?
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(BCM3563) have some troubles.
After checking thoroughly all path once again,
You should decide to replace BCM3563 or not.
After checking thoroughly all path once again,
You should decide to replace BCM3563 or not.
After checking audio signal line, you should decide to replace item or not.
YES
Check the output (Pin 30,31,36,37,47,48,53,54) of NTP3000((IC501).
Can you see the normal waveform?
Can you see the normal waveform?
NO
YES
After checking the Power & I2C & Reset of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
Check the speaker output wafer P500.
Can you see the normal waveform?
Can you see the normal waveform?
NO
YES
After checking audio signal line, you should decide to replace item or not.
Check the connector & Speaker
13. SPDIF Audio
Check the output (Pin AP11) of BCM3563(IC101).
Measure waveform at R680 because it’s more easy to check.
Can you see the normal signal?
Measure waveform at R680 because it’s more easy to check.
Can you see the normal signal?
Check the input of J500.
Can you see the normal waveform?
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(BCM3563) have some troubles.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
After checking thoroughly all path once again, You should decide to replace
BCM3563 or not.
After checking audio signal line, you should decide to replace item or not.
YES
After checking the Jack, you should decide to replace item or not.
- 20 -
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BLOCK DIAGRAM
1. Main
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