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MPA280 

 

SERVICE MANUAL 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for MPA280

Page 1: ...MPA280 SERVICE MANUAL ...

Page 2: ...SERVICE MANUAL MPA280 INDEX BLOCK DIAGRAM SCHEMATICS COMPONENTS LOCATION SCHEMA TESTING AND QUALITY CONTROL TECHNICAL CHARACTERISTICS WIRING DIAGRAM MECHANICAL DIAGRAM PACKING DIAGRAM ...

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Page 9: ...47p FCXCN14700 C123 47µ 16 FCCE100000 C124 47µ 16 FCCE100000 C125 C47p FCXCN14700 C126 47µ 16 FCCE100000 C127 470n FCXCN44700 C128 470n FCXCN44700 C129 22µ 35 FCCE200220 C130 10µ 50 FCCE250100 C131 10µ 50 FCCE250100 C132 22µ 100 FCCE200220 C133 100n FCXCN41000 C134 22µ 35 FCCE200220 C135 22µ 100 FCCE350220 C136 100n FCXCN41000 C137 33n FCXCN40330 C138 470n FCXCN44700 C139 470n FCXCN44700 C140 10µ ...

Page 10: ...CXDDBAS16 D104 Green led FCLED300VE D105 BAS16 FCXDDBAS16 D106 Green led FCLED300VE D107 BAS16 FCXDDBAS16 D108 Green led FCLED300VE D109 BAS16 FCXDDBAS16 D110 BYD17M FCXDD40070 D111 BYD17M FCXDD40070 D112 Z4 7 FCXZ000047 D113 Red led FCLED300RO D114 BAS16 FCXDDBAS16 D115 BYD17M FCXDD40070 D116 BYD17M FCXDD40070 D117 Z4 7 FCXZ000047 D118 Red led FCLED300RO D119 BAS16 FCXDDBAS16 D120 BYD17M FCXDD400...

Page 11: ... L104 68µH FCCHK00680 L105 1µH FCIND00200 L106 1µH FCIND00200 L107 1µH FCIND00200 L108 1µH FCIND00200 Q101 BC857B FCXTT08570 Q102 BC857B FCXTT08570 Q103 BC857B FCXTT08570 Q104 BC857B FCXTT08570 Q105 MJE15030 FCTR150300 Q106 MJE15031 FCTR150310 R101 100 Ohms FCXR021000 R102 470k FCXR054700 R103 100 Ohms FCXR021000 R104 470k FCXR054700 R105 100 Ohms FCXR021000 R106 100k FCXR051000 R107 100 Ohms FCXR...

Page 12: ...051000 R149 22k FCXR042200 R150 MF1k FCXR131000 R151 22k FCXR042200 R152 10k FCXR041000 R153 33k FCXR043300 R154 22k FCXR042200 R155 20 Ohms FCXR012000 R156 2k2 FCXR032200 R157 MF18k2 FCXR141820 R158 22k FCXR042200 R159 22k FCXR042200 R160 33k FCXR043300 R161 MF10k FCXR141000 R162 22k FCXR042200 R163 20 Ohms FCXR012000 R164 2k2 FCXR032200 R165 MF18k2 FCXR141820 R166 MF1k FCXR131000 R167 22k FCXR04...

Page 13: ...0 Ohms FCXR012000 R188 20 Ohms FCXR012000 R189 20 Ohms FCXR012000 R190 20 Ohms FCXR012000 R191 20 Ohms FCXR012000 R192 20 Ohms FCXR012000 R193 20 Ohms FCXR012000 R194 20 Ohms FCXR012000 R195 6k8 FCXR036800 R196 6k8 FCXR036800 R197 6k8 FCXR036800 R198 6k8 FCXR036800 R199 3k FCXR033000 R200 3k FCXR033000 S101 Dial switch RS003 A066BQ FCINTR0500 S102 Switch 17128 FCINTD4000 ...

Page 14: ...ent and correspond to their respective outputs Also check that the leds of clip and SP act with their corresponding input Position 2CH BRIDGED ST Put a charge of 8Ω in the red terminal of CH1 CH2 and do the same for CH3 CH4 see diagram on amp for the correct connection Check that only the buttons of CH1 affect the output formed by CH1 CH2 and the buttonof CH4 affects the output formed by CH3 CH4 T...

Page 15: ...tput level until the CLIP LEDs light up Turn the output level back down and plug the loudspeakers Check the sound quality no distorsions or noises Check ATT action ATT travel signal cut at their low end no scratching or clicking noises and correct stereo channel matching for each one While the power amplifier is working shake it or throw it on a table to make sure the output sound goes on playing ...

Page 16: ...er 0 008 TIM 100 0 2 Signal noise ratio 20Hz 20kHz ref 1W 4Ω 75dB ref nominal power 4Ω 92dB Damping factor 1kHz 8Ω 150 Slew Rate 10Vµs Channel crosstalk 1kHz 68dB Input connector RCA Sensitivity nom impedance 0dBV 1V 25kΩ SIGNAL PRESENT indicators 40dBV Output connector Screw terminal CLIP indicators 1 5dB real clip Mains Depending on your country See characteristics in the back of the unit Power ...

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Page 19: ...40 1 RIGHT LATERAL WD 002242 FCMECMPA40 5 WHITE CONTROL KNOB D15 FCBOT15BL3 4 NUT M5 DIN934 FCTUE00500 1 GROUND TERMINAL WD 00 1761 FCBOR00300 1 WASHER M4 SEG FCARS40000 1 TRANSFORMER WASHER FCMECARTR0 1 WASHER M4 ADE FCARDE0300 1 MAINS INPUT AC 13 FCBASRE300 1 TRANSFORMER WHITH ASSEMBLY KIT FCTFTMPA00 2 SPACER WLS 20 0 FCSEPWLS20 1 POWER SWITCH FCINTRED25 4 SCREW 2 9x13 DIN7981 FCT4002913 1 SCREW...

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Page 21: ...ARN50000 4 WASHER AT 5x11 5x3 5 ABS FCARAT3000 1 PACKING BOX MPA280 FCCAJP8800 1 FUSE T 6 3A FCFUS50180 4 BASE ADHESIVE FCPIE11255 2 PROTECTING M872 1 FCCANT0075 1 BAG FOR MANUAL 120x180mm FCBOL00200 1 PLASTIC BAG 43x60cm FCBOLS0100 1 PLASTIC BAG 60x80mm FCBOL00100 1 MANUAL MPA280 FCMANMPA00 1 WARRANTY CARD FCTARJG000 1 MAIN SUPPLY CABLE STANDARD FCCONX0400 ...

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