NAD-C542-cd-tb3 电路图 维修手册.pdf

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1、Page 1 of 1 Technical Bulletin C542 Product: CD Player Hardware Technical Bulletin: C542-H2005-04 Date: June 27/05 Subject: Improved Playability Note: Implemented in production starting from serial #: G56C54224800 Previous T.B.s required: K K K K YES K K K K NO DESCRIPTION: You may have the complain

2、t that some discs are difficult to play . REASON: The rf eyepattern level can be slightly lower than expected when reading some cds. SOLUTION: Increase rf level from laser pick up. Change the following parts to increase the rf level. 1. Change resistor R227 from 100R to a jumper wire. 2. Change resistor R103 from 20K to 15K. 3. Change resistor R218 from 15K to 47K. 4. Change capacitor C221 from 0.1uF to 3900 pF. Contact: NAD Electronics International 633 Granite Court Pickering, ON Canada L1K 3K1 Voice: 905-831-0799 FAX 905-837-6357 RadioFans.CN 收音机爱 好者资料库