LG RC-185 Service Manual page 24

VCR ELECTRICAL TROUBLESHOOTING GUIDE
2. SERVO CIRCUIT
(4) Keys do not work
Keys do not work
Is 5V applied to IC501
Pin36?
YES
Does CLOCK LED change
when a function button is
pressed?
NO
Refer to "SMPS 5.3VA
Trouble Shooting".
NO
Replace the defective
switches.
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