DOWNLOAD LG 26LC4R (CHASSIS:LP78A) Service Manual ↓ Size: 4.95 MB | Pages: 32 in PDF or view online for FREE

Model
26LC4R (CHASSIS:LP78A)
Pages
32
Size
4.95 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
26lc4r-chassis-lp78a.pdf
Date
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- 21 -
5. In the case of an unusual display in rear AV mode.
Is video input of
the A/V jack normal?
(Check R172)
Yes
Sam as Block A.
Check the input source.
No
6. In the case of an unusual display in Side AV mode.
Is the
video input of
the A/V jack normal?
(Check CN703
Pin9)
Yes
Sam as Block A.
Check the input source.
No
7. In the case of an unusual display in Side S-Video mode.
Is the
video input of
the A/V jack normal (Check
CN703 Pin1,
Pin3)?
Yes
Sam as Block A.
Check the input source.
No
- 22 -
8. In the case of an unusual display in SCART 1 mode.
Is the video input
of the A/V jack normal?
(Check R172)
Yes
Sam as Block A.
Check the input source.
No
9. In the case of an unusual display in SCART 1_RGB mode.
Is the
video input of
the A/V jack normal?(Check
R110,R170, R171,
R173)
Yes
Sam as Block A.
Check the input source.
No
10. In the case of an unusual display in SCART 2 mode.
Is the
video input of
the A/V jack normal?
(Check R174)
Yes
Sam as Block A.
Check the input source.
No
- 23 -
11. In the case of an unusual display in component 1 mode.
Is the video
input of the A/V jack
normal? (Check R248,
R249,R250)
Yes
Change the IC(IC500).
Check the input source.
No
12. In the case of an unusual display in component 2 mode.
Yes
Change the IC(IC500).
Check the input source.
No
Is the video
input of the A/V Jk202
normal? (Check R241,
R242, R243)
13. In the case of an unusual display in RGB mode.
Yes
Change the IC(IC500).
Check the input source.
No
Is the
R, G, B input
and H, V sync of the JK201
normal?(Check R220, R221,
R253, R254,
R255)
- 24 -
14. No Sound
(1) Symptom
1) LED is green.
2) There is a picture but no sound.
(2) Follow check
Is there
sound in any
mode?
Is the speaker on?
Yes
Yes
Is the speaker
cable normal?
Yes
Yes
Is there
no sound only for
HDMI?
Yes
Is there no 
sound only AV
/COM2/PC?
Is the
output of IC600
(R607, R608)
normal?
Yes
Is there
no sound only for
RF?
No
No
No
No
Download the EDID data.
Set speaker on 
in the menu.
No
Replace the
IC600.
No
Check the Speaker
cable.
No
Is the IC500
operating normal?
Replace the IC500.
No
Yes
Is the IC601
operating normal?
Replace the IC601.
Replace the VSC BD.
Yes
Check the signal after IC600.
refer to circuit diagram.
Check the Tuner In/Out.
No
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