Technics-SUCH900-int-sch(1) 维修电路原理图.pdf
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Technics-SUCH900-int-sch(1) 维修电路原理图.pdf
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 853689Audio Visual email: av.technicalmail.panasonic.co.ukPanasonic CS U.K. Document No: 01 Model: SU-CH9001 Product Group: HiFi MiniModel: SU-CH900Date: 14/12/99Revision No: 01Document No: 01Subject: Unit Cuts OutSYMPTOM:The unit turns off unexpectedly during normal operation and anindication 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 cloggedcommutator).2.A faulty detector circuit (short or disconnection).3.Smoothing capacitor (C571) used in fault detector circuit ofoutput IC is possibly dry joint. The problem is liable to occurwhen the output is high.REMEDY:1.Defective fan motor: Replace the fan motor Part No. SYE1128-4unless the resistance across both ends of the coil is between 20and 30 Ohms.2.Incorrect action of fan motor circuit: Mount a capacitor acrossboth 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
