LG 55EA9800-SA (CHASSIS:EJ34D) Service Manual ▷ View online
C. Audio error
No audio/ Normal video
Established
date
Revised date
8/16
LCD TV
Error
symptom
Standard Repair Process
2013.01.31
No audio/ Normal video
Revised date
8/16
No audio
Screen normal
Screen normal
Check user
menu >
Speaker off
menu >
Speaker off
Off
N
Check audio B+ 24
of Power Board
of Power Board
Normal
voltage
voltage
Y
☞
A20
☞
A21+A18
Speaker off
Y
Cancel OFF
N
Replace Power Board and repair parts
Check
Speaker
Speaker
N
Replace MAIN Board
End
Disconnection
disconnection
Y
Replace Speaker
8
C. Audio error
Wrecked audio/ discontinuation/noise
Established
date
Revised date
9/16
LCD TV
Error
symptom
Standard Repair Process
2013.01.31
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Wrecked audio/ discontinuation/noise
Revised date
9/16
☞
A21+A18
Wrecked audio/
Discontinuation/
Noise for
all audio
Check and replace
speaker and
connector
speaker and
connector
Y
Check input
signal
-RF
signal
-RF
Signal
Y
Check audio
B+ Voltage (24V)
B+ Voltage (24V)
☞
A21+A18
Wrecked audio/
Discontinuation/
Noise only
for D-TV
N
Normal
voltage?
-RF
-External Input
signal
-External Input
signal
normal?
Replace Main B/D
N
Wrecked audio/
Discontinuation/
Noise only
for Analog
Replace Power B/D
(When RF signal is not
received)
received)
Wrecked audio/
Discontinuation/
Noise only
for External Input
Connect and check
N
Normal
received)
Request repair to external
cable/ANT provider
Request repair to external
cable/ANT provider
Replace Main B/D
(In case of
End
Connect and check
other external
device
other external
device
Y
Normal
audio?
Check and fix external device
External Input
signal error)
Check and fix
external device
signal error)
Check and fix
external device
Check and fix external device
9
D. Function error
Remote control & Local switch checking
Standard Repair Process
Established
date
Revised date
10/16
LCD TV
Error
symptom
2013.01.31
Remote control & Local switch checking
1. Remote control(R/C) operating error
☞
A22
☞
A22
Replace
Main B/D
☞
A22
Revised date
10/16
Y
N
Check R/C itself
Operation
Normal
operating?
Y
Check & Repair
Cable connection
Connector solder
Connector solder
Normal
operating?
Check B+
3.5V
On Main B/D
Normal
Voltage?
N
☞
A18
Check IR
Output signal
Normal
Signal?
N
Y
N
A22
Y
Check R/C Operating
When turn off light
in room
Check & Replace
Baterry of R/C
Close
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
☞
A18
Repair/Replace
IR B/D
Normal
operating?
Close
If R/C operate,
Explain the customer
cause is interference
from light in room.
N
Y
Replace R/C
10
D. Function error
MR13/P operating checking
Standard Repair Process
Established
date
Revised date
11/16
LCD TV
Error
symptom
2013.01.31
MR13/P operating checking
2. MR13/P (Magic Remocon) operating error
Revised date
11/16
☞
A4
Y
N
Check MR13/P
itself Operation
Normal
operating?
Y
Is show ok
message?
Press the
wheel
N
Turn off/on the
set and press
the wheel
Check the
INSTART menu
RF Receiver ver
is “00.00”?
Y
N
Check & Replace
Battery of MR13/P
Close
Y
Check & Repair
RF assy
connection
☞
A23
Normal
operating?
Close
Is show ok
message?
N
N
Press the back
key about 5sec
Y
RF Receiver ver
N
Cl
☞
A4
N
Y
Replace
MR13
y
Close
Y
is “00.00”?
Close
•If you conduct the loop at 3times, change the
MR13/P.
MR13/P.
Down load the Firmware
* INSTART MENUÆ
02.11
Remocon TestÆ3. Firmware
download
download
11
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