NAD-118-pre-sh维修电路原理图.pdf

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NAD 118 SERVICE HINT PROBLEM: No audio output on switching on. CAUSE: The AC mains voltage is too high, causing a voltage regulator to lock up. This can occur when the AC mains is more than 234V (Europian version) SOLUTION: Replace U7, Motorola MC7912CT by NEC7912. PRODUCTION: A special thanks to NAD Service Department Aylesbury, UK. PAGE 1-98-08 RadioFans.CN 收音机爱 好者资料库