LG 37LC2RR (CHASSIS:MF-056M) Service Manual ▷ View online
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4-2. In case of does’t display the screen into specific mode
(1) Symptom
Ø
The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check following
Ø
Check the all input mode should become normality display.
Ø
Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode. (Re-Check it Swap)
(3) In case of becomes unusual display from RF mode
(4) In the case of becomes unusual display from RF, AV mode
(5) In the case of becomes unusual display from Component, RGB mode
(6) In the case of becomes unusual display from HDMI mode
Is the Tuner normal?
Is the CXA2069Q
normal?
Is the Tuner Cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Is the FIL8532
normal?
Replace the Tuner.
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the Input voltage, IIC Communication
and HV sync normal?
and HV sync normal?
No
Replace the IC.
No
Is the Input voltage, IIC Communication
and HV sync normal?
and HV sync normal?
No
Replace the IC.
No
Is the CXA2069Q
normal?
Yes
Is the FIL8532
normal?
Is the Input voltage, IIC Communication
and HV sync normal?
and HV sync normal?
No
Replace the IC.
No
Is the Input voltage, IIC Communication
and HV sync normal?
No
Replace the IC.
No
Is the FIL8532
normal?
Is the Input voltage, IIC Communication
and HV sync normal?
No
Replace the IC.
No
Is the SIL9011
normal?
Yes
Is the FIL8532
normal?
Is the Input voltage, IIC Communication
and HV sync normal?
No
Replace the IC.
No
Is the Input voltage, IIC Communication
and HV sync normal?
No
Replace the IC.
No
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5. In case of no sound
(1) Symptom
Ø
LED is white
Ø
Screen display but sound is not output.
(2) Check following
Is the SPK cable
normal?
Is the SPK cable
connected well?
Cable inserts well.
No
No
Replace IC400
No
Replace IC404
No
Replace SPK cable
Yes
Yes
Is the RF/ AV/
Component/ RGB/
HDMI sound normal?
No
Does IC400
Operates ?
Does IC404
Operates ?
Replace
VSC B/D
Yes
Yes
<DVR Board>
1. Time shift Mode
(1) Symptom
Ø
Doesn’t work time shift mode.
Ø
Can’t enter to recorded list.
Ø
Can’t record AV/RF.
(2) Check following
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Is time shift mode on?
Are the cables connected well?
(12pin, 4pin, 400pin)
(12pin, 4pin, 400pin)
Insert cables well.
No
No
HDD jumper is located
in Master?
in Master?
Yse
Power B/D works well?
Yes
Yes
Change power B/D
No
Place jumper to
maste position.
maste position.
No
31pin flat cables are
connected well?
connected well?
Yes
Connect 31pin cabel.
No
Check U1, U7, U11.
Are these ICs wrong?
Are these ICs wrong?
Yes
Change ICs.
Yes
Change the DVR B/D.
No
Change the HDD.
Is it right?
Is it right?
No
Change time shift
mode from off to on.
mode from off to on.
2. Time shift sound and Recorded video sound
(1) Symptom
Ø
SOUND doesn’t come out.
(2) Check following
3. Recorded video
(1) Symptom
Ø
Can’t play the recorded video.
(2) Check following
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MUTE key on
Is sound cable right?
Connect the speak cable.
Is sound right?
Is sound right?
Turn off the mute Key
Are power cables
connected well.
Yes
No
No
Yes
Is 31pin cable right?
No
No
No
Yes
Connect 31p cable.
No
Check speakers.
Are they right?
Are they right?
Yes
Check U13, U14, U1, U7.
Check MSP(IC406), IC404.
Is it right?
Check MSP(IC406), IC404.
Is it right?
Yes
Yes
No
Connect 31pin cabel.
No
Change the ICs
Is it right?
Change the Board
Check 31pin flat cable.
Is it right?
Is it right?
check 40pin, 4pin HDD cable.
Is it right?
Is it right?
Connect cable well
Connect 31pin well.
Check U11, U1 U7
Is it right?
Is it right?
Remove the recorded lists
and record one more time
and play again.
Is it right?
and record one more time
and play again.
Is it right?
No
Yes 1
Yes 2
Yes
No
Check 2068(IC1206).
Is it right
Is it right
No
Change the HDD
Is it right.
Is it right.
Change the Board
No
No
No
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