Yorkville Sound AP3000 AND AP3400 SERVICE, Quick Fix for M1002 and M1002A, Yorkville Sound

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YORKVILLE SOUND

YORKVILLE SOUND

AP3000 AND AP3400 SERVICE

Quick Fix for M1002 and M1002A

To speed up the servicing of the AP3000 or AP3400 on your bench, Yorkville Sound’s service department has developed a method to replace the components most likely to fail when a M1002/A amplifier board requires service.

This Quick Fix kit contains the procedure, assembly drawings, and components to perform the Quick Fix to a M1002 or M1002A board.

It should be understood that the person using this procedure knows how to test resistors, diodes, and transistors to determine if they are defective. This procedure is not intended to be a substitute for one’s lack of electronic capability.

Before starting, look at the board for repair and locate the version number. It is very important that you follow the procedure for the appropriate circuit board version number.

A complimentary service manual for the AP3000 power amplifier is supplied with this M1002KIT.

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Contents HIGH EFFICIENCY STEREO POWER AMPLIFIER 3400Quality and Innovation Since CANADAIMPORTANT SAFETY INSTRUCTIONS Power SourcesREFER SERVICING TO QUALIFIED SERVICE PERSONNEL Power CordVOLTAGE AMPLIFIER CIRCUIT DESCRIPTIONSHUTDOWN CIRCUIT CIRCUIT DESCRIPTIONQUIESCENT CONDITION THE SECOND TIERConditions of test Current Limit Protection CircuitryDC Protection EMS Circuit Fan CircuitThermal Shutdown Circuit Identifying Defective Boards in the AP-3400SPECIFICATIONS STEP 3 POWER UP PROCEDURE WITHOUT M1002A BOARDSSTEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONS POWERSTEP 3 POWER UP PROCEDURE WITHOUT M1002 BOARDS STEP 4 DISMANTLING AND REASSEMBLY PRECAUTIONSAP3400 Parts List 10/28/98 STEP 1 VISUAL INSPECTION OF FRONT PANEL AND FANM1013A.SCH DATABASE HISTORY M1011A.SCH DATABASE HISTORYM1002A.SCH DATABASE HISTORY M1011A.SCH DATABASE HISTORY MODELS - AP-3400DATE VER# DESCRIPTION OF CHANGEM1011A MS2BOTTOMBAMPSHEAR SHEARM1011A M1011A.PCB DATABASE HISTORYRIGHT = CHAN B LEFT = CHAN AC8M1012 M1012SHEAR SHEARMJH11018 MPSA062N5551 B C EMJH11018 2N5551MPSA06 B C EM1013A AP-3400COPPER OZ 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 M1002A AP-3400SHEAR CHECKSHOWN WIRED FOR AP-3400CEXFMR WIRING NOV#1289 A C - W H I T ESHOWN WIRED FOR AP-3400CEXFMR WIRING NOV#1289 A C - W H I T E