Yorkville Sound 3400 Important Safety Instructions, Power Sources, Alimentation, Hazards, Service

Contents Quality and Innovation Since HIGH EFFICIENCY STEREO POWER AMPLIFIER3400 CANADAREFER SERVICING TO QUALIFIED SERVICE PERSONNEL IMPORTANT SAFETY INSTRUCTIONSPower Sources Power CordSHUTDOWN CIRCUIT VOLTAGE AMPLIFIERCIRCUIT DESCRIPTION CIRCUIT DESCRIPTIONQUIESCENT CONDITION THE SECOND TIERConditions of test Current Limit Protection CircuitryDC Protection Thermal Shutdown Circuit EMS CircuitFan Circuit Identifying Defective Boards in the AP-3400STEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS SPECIFICATIONSSTEP 3 POWER UP PROCEDURE WITHOUT M1002A BOARDS POWERAP3400 Parts List 10/28/98 STEP 3 POWER UP PROCEDURE WITHOUT M1002 BOARDSSTEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS STEP 1 VISUAL INSPECTION OF FRONT PANEL AND FANM1013A.SCH DATABASE HISTORY M1011A.SCH DATABASE HISTORYM1002A.SCH DATABASE HISTORY DATE M1011A.SCH DATABASE HISTORYMODELS - AP-3400 VER# DESCRIPTION OF CHANGESHEAR M1011AMS2BOTTOMBAMP SHEARM1011A M1011A.PCB DATABASE HISTORYRIGHT = CHAN B LEFT = CHAN ASHEAR C8M1012M1012 SHEAR2N5551 MJH11018MPSA06 B C EMPSA06 MJH110182N5551 B C ECOPPER OZ M1013AAP-3400 SHEAR@R55WATT M1002A AP-34005WATT Testing Repaired Circuit Board YORKVILLE SOUND AP3000 AND AP3400 SERVICEQuick Fix for M1002 and M1002A the M1002 or M1002A circuit board to be serviced If the SHEAR M1002AAP-3400 CHECK#1289 SHOWN WIRED FORAP-3400CEXFMR WIRING NOV A C - W H I T E#1289 SHOWN WIRED FORAP-3400CEXFMR WIRING NOV A C - W H I T E