Cambridge-740C-cd-tb维修电路原理图.pdf
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Cambridge-740C-cd-tb维修电路原理图.pdf
TNBC-0029 Issue 1 Sept 08 Technical Bulletin Issued by: David Drewett, Service Manager. Email: Telephone: +44 (0) 207 551 5403 Audio Partnership Plc. Gallery Court, Hankey Place, London, SE1 4BB Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Product : Azur 840C and 740C CD players Page 1 of 1 Fault Symptom: Low gain or no audio output on one or both channels. C270 on the 840C , or C5 on the 740C DAC PCB may be visibly damaged (top pushed up). Relays RL1, 2, 3 may not close. Cause: The unregulated 10V supply on these DAC boards is smoothed by a 470uF capacitor, rated at 16V. High mains spikes and supply fluctuations can cause premature failure of the capacitor. Solution: Replace this capacitor with the same value, but rated at 35V. We advise that you make this modification to all service returns. n.b. Production from September 2008 will be revised. RadioFans.CN 收音机爱 好者资料库
