LG 50PC5D-ZB / 50PC5D1-ZD (CHASSIS:PD73A) Service Manual ▷ View online
5-2. In case of does’t display the screen into specific mode
(1) Symptom
1) The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check following
1) Check the all input mode should become normality display.
(3) In case of becomes unusual display from RF mode
(4) In the case of becomes unusual display from side S-video/AV mode
Is the Tuner normal?
Is the CXA2069Q normal?
Is the Tuner Cable connected well?
Cable inserts well.
Yes
No
No
Yes
Is the FIL8548 normal?
Replace the Tuner.
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the Input voltage, IIC
Communication normal?
No
Replace the IC.
No
Is normal the Input voltage, IIC
Communication?
No
Block A
Replace the IC.
No
Is the Video input of the AV
Jack(P1400)normal?
Yes
Is the CXA2069Q normal?
Check the input source and Cable
No
Is the Input voltage, IIC
Communication normal?
No
Replace the IC.
No
Yes
Same as Block A
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(5) In the case of becomes unusual display from Component, RGB mode
(6) In the case of becomes unusual display from HDMI mode
(7) In the case of becomes unusual display from SCART1 mode
(8) In the case of becomes unusual display from SCART2 mode
Is theR,G,B input and H,V
Sync of the J1100 normal?
Check the input source
No
Is the HDMI002(IC1004)
normal?
Yes
Same as Block A
Is the Input and Output signal,IIC
Communication normal?
No
Is the Video input od A/V
Jack(J1200) normal?
Yes
Same as Block A
Check the input source
No
Replace the IC.
No
Is the Video input od A/V
Jack(J1201) normal?
Yes
Same as Block A
Check the input source
No
Yes
Same as Block A
6. In case of no sound
(1) Symptom
1) LED is Green.
2) Screen display but sound is not output.
2) Screen display but sound is not output.
(2) Check following
All input(mode) is no
sound?
Only HDMI is No
Sound?
No
Yes
Download
the EDID data
Check the signal after
CAX2069 refer to circuit diagram
No
Only specific input
(except HDMI,DTV,RF)
is no sound?
Check the signal before
CAX2069 refer to circuit diagram
No
YES
YES
Only RF is no sound?
Check
the Tuner IN/OUT
No
YES
YES
Only AV/component/PC
input is no sound?
Is the output of
CXA2069 normal?
No
YES
IC1300 operates
normal?
Replace the IC1300
(MSP4450)
No
IC1301 operates
normal?
Replace the IC1300
(STA335BW)
No
YES
Replace the VSC B/D
YES
No
Replace the CXA2069
Is the speaker On it
menu?
Set on speaker in menu.
No
Is the speaker Cable
normal?
Check the Speaker
Cable.
No
Yes
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BLOCK DIAGRAM
Integration
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