Yorkville Sound 3400 service manual Right = Chan B, Left = Chan A

Contents 3400 HIGH EFFICIENCY STEREO POWER AMPLIFIERQuality and Innovation Since CANADAPower Sources IMPORTANT SAFETY INSTRUCTIONSREFER SERVICING TO QUALIFIED SERVICE PERSONNEL Power CordCIRCUIT DESCRIPTION VOLTAGE AMPLIFIERSHUTDOWN CIRCUIT CIRCUIT DESCRIPTIONTHE SECOND TIER QUIESCENT CONDITIONDC Protection Current Limit Protection CircuitryConditions of test Fan Circuit EMS CircuitThermal Shutdown Circuit Identifying Defective Boards in the AP-3400STEP 3 POWER UP PROCEDURE WITHOUT M1002A BOARDS SPECIFICATIONSSTEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS POWERSTEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS STEP 3 POWER UP PROCEDURE WITHOUT M1002 BOARDSAP3400 Parts List 10/28/98 STEP 1 VISUAL INSPECTION OF FRONT PANEL AND FANM1002A.SCH DATABASE HISTORY M1011A.SCH DATABASE HISTORYM1013A.SCH DATABASE HISTORY MODELS - AP-3400 M1011A.SCH DATABASE HISTORYDATE VER# DESCRIPTION OF CHANGEMS2BOTTOMBAMP M1011ASHEAR SHEARM1011A.PCB DATABASE HISTORY M1011ALEFT = CHAN A RIGHT = CHAN BM1012 C8M1012SHEAR SHEARMPSA06 MJH110182N5551 B C E2N5551 MJH11018MPSA06 B C EAP-3400 M1013ACOPPER OZ SHEAR5WATT M1002A AP-3400@R55WATT Testing Repaired Circuit Board Quick Fix for M1002 and M1002A AP3000 AND AP3400 SERVICEYORKVILLE SOUND the M1002 or M1002A circuit board to be serviced If the AP-3400 M1002ASHEAR CHECKAP-3400CEXFMR WIRING NOV SHOWN WIRED FOR#1289 A C - W H I T EAP-3400CEXFMR WIRING NOV SHOWN WIRED FOR#1289 A C - W H I T E