Service manual

MODEL: L423FR
Page 33
2-4. No picture displayed and picture errors of HDMI signal only.
YES
Is all harness connected correctly?
Poor harness connection or
defective cable.
NO
Enter gray scale pattern of 1080i timing
in J500 connector, and select HDMI INPUT.
And then, perform AV reset by front switch.
The video level inputs above 0.7Vp-p.
Problem is in IC500 or IC501 or their
Peripheral circuits.
Please exchange PWB-MAIN
2-5. No picture displayed and picture errors of INPUT signal only(included S-Video).
1.0Vp-p
YES
Is all harness connected correctly?
Poor harness connection or
defective cable.
NO
Enter an input of NTSC gray scale
in J601 (or J605) connector, and select INPUT.
The video level inputs about 1.0Vp-p.
Problem is in IC5G0 or IC5G1 or their
Peripheral circuits.
Please exchange PWB-MAIN