NAD-T562-cd-tbh200401 电路图 维修手册.pdf

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1、Page 1 of 2 Technical Bulletin T562 Product: DVD Player Hardware Technical Bulletin: H2004-01 Date: May 25, 2004 Subject: POPPING NOISE Note: N/A Previous service bulletins required: ? ? YES ? ? NO DESCRIPTION: You may have a complaint that when turning the unit on from the front panel, a pop noise

2、is heard from the analogue audio output. REASON: The muting circuit is not activating during the first second of operation. SOLUTION: Identify the AUDIO VIDEO pc board as VER. 2.0 or 2.1. For VER. 2.1 remove U613 and R605, located near the right side of the video socket J608, as shown in Figure 1. F

3、or VER 2.0 remove only U613, located near the right side of the video socket J608, as shown in Figure 1. Solder a wire from U613s pin 1 (solder pad closest to J608) to Q501s emitter leg as shown in Figure 1 and Figure 2. Figure 1 RadioFans.CN 收音机爱 好者资料库 Page 2 of 2 Technical Bulletin T562 Product: DVD Player Hardware Technical Bulletin: H2004-01 Figure 2 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