Sanyo LCD-47XR7H, Service Manual

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37
(2) with sound but no picture
(3) with picture but no sound
a) MP7722
Check if
backlight is light Check the power
supply of backlight No backlight power supply
output or short to the ground
XB12 3# switch level is abnormal
(such as shortage) LVDS power supply
of C415 is normal?
N403 and its
periphery has
problem
If X403 has LVDS wave
output Main CPU NS02
LVDS have problem
Problem lies in LVDS
wire or panel
If audio amplifier has
output (if X13 has wave)
Speaker damaged
If sound processing IC has
output (C116,C117)
Audio amplifier and the circuit
has problem. Check the power
supply, 6# MUTE, 14#,19#
Sound processing IC N03 and
its periphery has problem
Yes
No No
Yes
No
No
Yes
No
Yes
No