DOWNLOAD LG 47LH9000 (CHASSIS:LD91I) Service Manual ↓ Size: 8.43 MB | Pages: 45 in PDF or view online for FREE

Model
47LH9000 (CHASSIS:LD91I)
Pages
45
Size
8.43 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
47lh9000-chassis-ld91i.pdf
Date
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LG 47LH9000 (CHASSIS:LD91I) Service Manual ▷ View online

- 21 -
Check Signal format
Is it supported?
Check the RGB Cable
YES
MAIN B’D P400 Check
Replace MAIN B’D P400
YES
NO
NO
YES
Check MAIN B’D C208 (Video)
R246 (HSYNC)
R245 (VSYNC)
Replace
MAIN B’D C208 or R246 or R245
NO
Replace MAIN B’D IC 100
YES
MAIN B’D JK Pin #2
Video signal ?
R437 has Vsync ?
R440 has Hsync ?
12. RGB No Video Problem
Check Signal format
Is it supported?
Check the RGB Cable
YES
MAIN B’D P400 Check
Replace MAIN B’D P400
YES
NO
NO
MAIN B’D P400
Pin #3 (BLUE)
  Pin #2 (GREEN)
Pin #1 (RED)
Video signal ?
Check MAIN B’D C212 (RED)
C207 (GREEN)
C213 (BLUE)
Video Signal ?
Replace
MAIN B’ D C212 or C207 or C213
YES
NO
Replace MAIN B’D IC 100
YES
13. RGB No Color Problem
- 22 -
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace MAIN B’D IC 100
Check the ADJUST MENU
EDID OK ?
YES
Download EDID
(Refer to Adjustment Spec)
NO
NO
Replace
MAIN B’D IC601 (HDCP KEY)
14. HDMI1~4 All No Video Problem
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace IC100
MAIN B’ D IC600
MAIN B’ D JACK Check
J600 -> HDMI1
J601 -> HDMI2
J602 -> HDMI3
YES
 * This case is that HDMI Video doesn't display at the some HDMI input, not all.
Check Signal format
Is it supported?
Check the HDMI Cable
YES
YES
Replace IC100
MAIN B’ D JACK Check
J603 -> HDMI4
YES
YES
15. HDMI1 or 2 or 3 or 4 No Video Problem
- 23 -
Check The Speaker
Check Speaker Cable
YES
Check P700 Cable
YES
NO
Replace MAIN B’D IC 701
YES
MAIN B’D
L705 Pin #1
L704 Pin #2
PWM Signal ?
Replace Speaker
NO
Replace Speaker Cable
NO
* If headphone is connected,
  Speaker sound doesn't work
Replace MAIN B’D IC803
NO
YES
MAIN B’D
L700 = 1.8V
MAIN B’D
Check R722, R720, R721
Signal
YES
Replace MAIN B’D IC100
NO
Replace MAIN B’D IC701
NO
16. All Source no Audio Problem
Digital TV Video OK ?
YES
Replace MAIN B’D IC 100
17. Digital TV No Audio Problem
MAIN B’D C1216 Signal (SIF)
Replace MAIN B’D TU1200
NO
Analog TV Video OK ?
YES
Check MAIN B’D
C231 Signal (SIF)
NO
Replace MAIN B’D IC 100
YES
18. Analog TV No Audio Problem
- 24 -
Check the SCART Cable
YES
Check MAIN B’D
C229, C230
MAIN B’D
C229 (Right Sound)
C230 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
AV1 Video OK ?
YES
Check MAIN B’D JK1100
Replace MAIN B’D JK1100
NO
YES
19. AV1 No Audio Problem
Check the SCART Cable
YES
Check MAIN B’D
C2008, C2009
MAIN B’D
C2008 (Right Sound)
C2009 (Left Sound)
signal ?
YES
NO
Replace MAIN B’D IC 100
AV2 Video OK ?
YES
Check MAIN B’D JK1101
Replace MAIN B’D JK1101
NO
YES
20. AV2 No Audio Problem
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