LG 26LT360C-TA (CHASSIS:LB2AB) Service Manual ▷ View online
- 17 -
7. Audio of All iput
Check the speaker menu
(menu - > sound - > TV speaker)
Check the voltage of AMP IC(IC501)
24V, 3.3V
Check the Mstar Audio_Master_CLK signal
R148
Check the AMP I2C Line
R140, R141
Check the Mstar I2S output
IC501 9, 10, 11pin
Exchange the Mstar(IC101)
Or Main board
Check the I2C signal or
Exchange the Mstar(IC101)
Check the I2C signal or
Exchange the Mstar(IC101)
No
No
No
Yes
Yes
Yes
Yes
Check the Audio output signal
IC501 1, 2, 3, 4pin
Exchange the Audio AMP
IC501
No
Yes
Check the connector P501
Exchange the connector If
the connector is defect
No
Yes
Check the Speaker resistor or connector
Exchange the speaker
No
Yes
Menu toggle
No
Exchange the AMP IC or
Main board
No
8. TV Audio
Check the RF cable of RF signal
Check the voltage of Tuner 3.3V : L3703
Check the voltage of Tuner 1.8V
IC3703 2pin : 1.8V
Check the IF_P/N signal TU3700 10/11pin
Implement the “8. Audio of all input”
Of Malfunction guide
Exchange the L3703
Exchange the Tuner
No
No
Yes
Yes
Yes
Yes
Menu toggle
No
Exchange the L3703
No
- 18 -
Check the AV cable is defective
Check the signal of JK1601
R1684, R1685
Yes
Yes
Exchange the AV Jack
No
Implement the “8. Audio of all input”
Of Malfunction guide
9. AV Audio
10. RGB Audio
Check the Component cable is defective
Check the signal of JK1102
Yes
Yes
Exchange the AV Jack
No
Implement the “8. Audio of all input”
Of Malfunction guide
- 19 -
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BLOCK DIAGRAM
- 20 -
300
200
500
501
510
120
910
900
810
540
521
401
400
LV
1
A2
A21
A31
A10
* Set +Stand * Stand Base + Body
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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