LG 26LH200C / 26LH210C (CHASSIS:LP91Z) Service Manual ▷ View online
- 17 -
Is video
input of the HDMI Jack
normal?(Check JK301,
Same as Block A.
YES
NO
Check the input source.
Check DDC
communication lines(IC300,
IC301_Pin5,6)
Check the IC900, IC901
NO
Check HDCP
communication lines
(IC803)
Check the IC803
NO
YES
YES
JK302)
7. Unusual display from HDMI1/2 mode
All input is no sound?
Is the speaker
on on menu?
Is the speaker
cable normal?
cable normal?
IC800 operate
normally?
Set on speaker
on menu
Check the
Speaker cable
Replace IC800
IC600 operate
normally?
Replace IC800
Replace main board
Only HDMI is
no Sound?
Download the EDID data
Only RF or DTV is
no Sound?
Check the Tuner In/Out
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
8. No Sound
(1) Symptom
- LED is blue
- Screen display bu sound is not output.
- Screen display bu sound is not output.
(2) Check process
- 18 -
Check the input
source
IC602 operate
normally?
Check the external
speaker
Replace the external speaker
Re-solder or replace
the IC602
Change input source.
Check the speak wire
YES
YES
YES
NO
NO
NO
Check the IR waveform
of L402
Replace the Preamp of IR ass y.
Check the RS-232C Pin4.
9. Not operate the external speaker out
10. Not operate IR out
11. Not operate Front clock
- Direct user setting
- Setting that use TTX information
- 19 -
Check the Clock Display
item on SVC Menu
Is the clock
cable normal?
Check I2C line & output
of IC904
Check the LED clock
Re-solder or replace the defect part.
Replace the LED clock
Check the clock cable
Replace the Clock display item
from No to Yes .
Change the Clock ass y
Check the Time item
on user Menu
Check the current time establishment
on Time item of user menu.
Check the Clock Display
item on SVC Menu
. Change the Clock display item
from No to Yes .
. Change the PR. for TTX Clock item
from NO to YES
from No to Yes .
. Change the PR. for TTX Clock item
from NO to YES
YES
NO
Is the clock
cable normal?
Check I2C line & output
of IC904
Check the LED clock
Re-solder or replace the defect part.
Replace the LED clock
Check the clock cable
Change the Clock ass y.
YES
YES
YES
- 20 -
Is the supply
12V power of RJP good.
(JK900_Pin1)
Is the I2C communication good.
(IC101)
. Check the supply power.
Check the RJP &
Replace the RJP.
YES
YES
NO
NO
Check the RJP item
on SVC Menu
YES
Replace the RJP item from No to Yes.
. Check the I2C line of IC101.
NO
12. Not operate RJP
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