Philips DVP3350V Service Manual page 25

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2. SERVO CIRCUIT
(4) KEY doesn't working
KEY doesn't working.
Is 5V applied to the IC501
Pin36?
YES
Does LED or FLD change
when a function button is
pressed?
NO
Refer to "SMPS 5.3VA
Trouble Shooting".
NO
Replace the defective
switches.
3-9

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