Yorkville Sound service manual M1002A AP-3400, @R55WATT

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 TIERCurrent Limit Protection Circuitry DC ProtectionConditions of test 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 FANM1011A.SCH DATABASE HISTORY M1002A.SCH DATABASE HISTORYM1013A.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 SHEARM1002A AP-3400 5WATT@R55WATT Testing Repaired Circuit Board AP3000 AND AP3400 SERVICE Quick Fix for M1002 and M1002AYORKVILLE SOUND 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