LG 47SL85-UA (CHASSIS:LA92M) Service Manual ▷ View online
Check JK101 or JK102 on main PCB
Can you see the normal waveform?
JK101 or JK102 on main PCB
may have problem. Replace this Jack.
Check the input (Pin R1,R3,P2 and Pin V1,V2,U1)
of LGE3369(IC601).
Measure waveform at C603,C604,C605 and C617,C618,C619
because it’s more easy to check.
Can you see the normal waveform?
of LGE3369(IC601).
Measure waveform at C603,C604,C605 and C617,C618,C619
because it’s more easy to check.
Can you see the normal waveform?
SL80/SL85 Trouble shooting guide – Component
YES
NO
Video
NO
YES
YES
Check all power domain of LGE7329 (IC801)
(3.3V, 1.9V_CORE,1.26V)
(3.3V, 1.9V_CORE,1.26V)
& crystal output (X800 / 12MHz)&FRC_RESET
Measure Power & waveform at L800,L801,L802,L803,
L804,L806
because it’s more easy to check.
Can you see the normal waveform?
L804,L806
because it’s more easy to check.
Can you see the normal waveform?
This board has big problem because FRC chip(LGE7329) have some troubles.
After checking thoroughly all path once again, You should decide to replace
LGE7329.
Although you replace it, you cannot see normal display, decide to replace
After checking thoroughly all path once again, You should decide to replace
LGE7329.
Although you replace it, you cannot see normal display, decide to replace
Main chip(LGE3369)
This board has big problem because Main chip(LGE3369) have some troubles.
After checking thoroughly all path once again,
You should decide to replace LGE3369 or not.
After checking thoroughly all path once again,
You should decide to replace LGE3369 or not.
SL80/SL85 Trouble shooting guide – RGB PC
Check JK106
Can you see the normal waveform?
Can you see the normal waveform?
YES
JK106 may have problem. Replace this Jack.
NO
Check the input (Pin K1,K2,K3,L1,L3)
of LGE3369(IC601).
Measure waveform at R644,R645,C615,C610 and C616
because it’s more easy to check.
Can you see the normal waveform?
of LGE3369(IC601).
Measure waveform at R644,R645,C615,C610 and C616
because it’s more easy to check.
Can you see the normal waveform?
Video
NO
YES
YES
Check all power domain of LGE7329 (IC801)
(3.3V, 1.9V_CORE,1.26V)
(3.3V, 1.9V_CORE,1.26V)
& crystal output (X800 / 12MHz)&FRC_RESET
Measure Power & waveform at L800,L801,L802,L803,
L804,L806
because it’s more easy to check.
Can you see the normal waveform?
L804,L806
because it’s more easy to check.
Can you see the normal waveform?
This board has big problem because FRC chip(LGE7329) have some troubles.
After checking thoroughly all path once again, You should decide to replace
LGE7329.
Although you replace it, you cannot see normal display, decide to replace
After checking thoroughly all path once again, You should decide to replace
LGE7329.
Although you replace it, you cannot see normal display, decide to replace
Main chip(LGE3369)
This board has big problem because Main chip(LGE3369) have some troubles.
After checking thoroughly all path once again,
You should decide to replace LGE3369 or not.
After checking thoroughly all path once again,
You should decide to replace LGE3369 or not.
SL80/SL85 Trouble shooting guide – HDMI
Check input connect
JK200,JK201,JK202,JK203
Can you see the normal waveform?
JK200,JK201,JK202,JK203
Can you see the normal waveform?
Check DDC communication lines
(IC200)
(IC200)
JK200,JK201,JK202,JK203
may have problem. Replace this Jack.
Check the output of TDA9996HL(IC602)
_HDMI1,2,3
_HDMI1,2,3
or HDMI4.
.
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(IC105)
After checking the Power of this chip, you should decide to replace this or not.
YES
YES
YES
NO
NO
NO
Video
NO
YES
YES
Check all power domain of LGE7329 (IC801)
(3.3V, 1.9V_CORE,1.26V)
(3.3V, 1.9V_CORE,1.26V)
& crystal output (X800 / 12MHz)&FRC_RESET
Measure Power & waveform at L800,L801,L802,L803,
L804,L806
because it’s more easy to check.
Can you see the normal waveform?
L804,L806
because it’s more easy to check.
Can you see the normal waveform?
This board has big problem because FRC chip(LGE7329) have some troubles.
After checking thoroughly all path once again, You should decide to replace
LGE7329.
Although you replace it, you cannot see normal display, decide to replace
After checking thoroughly all path once again, You should decide to replace
LGE7329.
Although you replace it, you cannot see normal display, decide to replace
Main chip(LGE3369)
This board has big problem because Main chip(LGE3369) have some troubles.
After checking thoroughly all path once again,
You should decide to replace LGE3369 or not.
After checking thoroughly all path once again,
You should decide to replace LGE3369 or not.
Minerva-LA92B FHD-120/240Hz Model
Audio Trouble Shooting Guide
Minerva
Minerva
-
-
LA92B FHD
LA92B FHD
-
-
120/240Hz Model
120/240Hz Model
Audio Trouble Shooting Guide
Audio Trouble Shooting Guide
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