Technics-SUCH900-int-sch 电路图 维修手册.pdf

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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 TechInfo Sheet fax: 01344 853689 Audio Visual email: av.technicalmail.panasonic.co.uk Panasonic CS U.K. Document No: 01 Model: SU-CH900 1 Product Group: HiFi MiniModel: SU-CH900 Date: 14/12/99Revision No: 01Document No: 01 Subje

2、ct: Unit Cuts Out SYMPTOM:The unit turns off unexpectedly during normal operation and an indication of “E“ lights on the main display. CAUSE:One of the following may cause the cut out. 1.A defective fan motor (coil shorted, disconnected or clogged commutator). 2.A faulty detector circuit (short or d

3、isconnection). 3.Smoothing capacitor (C571) used in fault detector circuit of output IC is possibly dry joint. The problem is liable to occur when the output is high. REMEDY:1.Defective fan motor: Replace the fan motor Part No. SYE1128-4 unless the resistance across both ends of the coil is between 20 and 30 Ohms. 2.Incorrect action of fan motor circuit: Mount a capacitor across both ends of the fan motor. 3.Poorly soldered C571, re-solder this capacitor. NB Due to the nature of the problem, it is recommended that all of the three remedies above are carried out simultaneously