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3
、
No sound, but picture is normal.
Check if
voltage of N609-
4#/5#/32#/33# is
+24V?
Check +24V of power
board and its related
circuits
.
Check if
N609-12# /
25# has input
signal?
Check if
voltage of N609-
10# / 27# is high
level?
Check peripheral
circuits of power
amplifier.
Check mute circuits of
power amplifier
Check if
N320-3# / 5#
has input
signal?
Check earphone
amplified circuits
Check audio output
circuits of main chip
Yes
Yes
Yes
Yes
No
No
No
No
Summary of Contents for LED-42XR10FH
Page 19: ...Blockdiagram ...
Page 30: ...Troubleshooting guide LED 42XR10FH 1 No Backlight ...
Page 31: ...2 No Picture but backlight is normal ...
Page 43: ...APPENDIX B Exploded view LED 42XR10FH ...
Page 48: ...May 2010 ...