NAD-C272-cd-mod1 维修电路原理图.pdf

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1、Page 1 of 1 Technical Bulletin C272 Product: Amplifier Hardware Technical Bulletin: C272-H2005-01 Date: June 27/05 Subject: ATO Logic Sensitivity Note: Implemented in production starting from serial #: H42C27202477 Previous T.B.s required: K K K K YES K K K K NO DESCRIPTION: The ATO Logic of the amp

2、lifier does not always turn on when using the RCA inputs. REASON: The incoming level of the signal is not triggering the ATO Logic circuit. SOLUTION: Increase the sensitivity of the ATO turn on logic circuit. Change the following resistors. 1. Locate the Input sense pc board behind the rear panel. See Figure 1. 2. Change R901 and R902 from 1 M ohm to 330k ohm. Figure 1 Contact: NAD Electronics International 633 Granite CourtPickering, ON Canada L1K 3K1 Voice: 905-831-0799 FAX 905-837-6357 Locaton of R901 and R902 behind the sense/defeat switch at the rear panel. RadioFans.CN 收音机爱 好者资料库