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3.With picture but no sound.
Check if input signal in pin 2 of sound
Sound power amp. or other peripheral circuit
have
problem. Check power supply, if
SHUTDOWN pin control is normal and if
output short circuited or other problems that
cause protection to work.
4. AV no picture
Check if the pin1 of X4 has signal output
N400 or other peripheral
circuit have problem
PW2300 or other peripheral
circuit have problem
With picture but no sound
No
power amplification
R2S15900 or other peripheral
circuit have problem
Check if pin 7(AV1) and pin10 (AV2) has signal input
Yes
No
Yes
Check the N201 and peripheral circuit
no
If there is output from X700 of
sound power amplification board
Measure if the sound input of the
present channel corresponding to
N400 is normal
Yes
No
There is problem from Av
socket to N102 channel
Yes
PW218 or other peripheral
circuit have problem
30
Sound box damaged
No
Check different levels of
circuit following input audio
signal channel
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