Denon-PMA250-int-维修说明书手册含电器原理图

DENONHi-Fi Stereo Pre-main AmplifierSERVICE MANUALMODEL PMA-250STEREO PRE-MAIN AMPLIFIERTABLE OF CONTENTSSPECIFICATIONSBLOCK DIAGRAMCONTROLS AND DESCRIPTIONSC0 NNECTIONS.…22334METHOD OF ADJUSTMENTS .....................................:...................REMOVAL EACH SECTION…6SEMICONDUCTORS.......................5PRINTED WIRING BOARD PATTERNS AND PARTS LISTETC0862 POWER CONTROL UNIT (for E2)....................................6,10ETC0859 POWER CONTROL UNIT (for EK)...................................7,10ETC0864 POWER&CONTROL UNIT (for E1/EA).................................8,11ETC0865 POWER CONTROL UNIT (for EU/EC).................................9,11WIRING DIAGRAM…12SCHEMATIC DIAGRAM............EXPLODED VIEW OF CHASSIS AND CABINET PARTS LIST14NIPPON COLUMBIA CO.,LTD.