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Infinity 1210a, Service Manual

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Reference Series 

1210a 

1211a 

 

1 CHANNEL POWER AMPLIFIER 

 

SERVICE MANUAL

 

 
 

 

 

 

Infinity Systems, Inc. 

250 Crossways Park Dr. 

Woodbury, New York   11797   Rev

2

aa

10

/2005 

Summary of Contents for 1210a

Page 1: ...Reference Series 1210a 1211a 1 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems Inc 250 Crossways Park Dr Woodbury New York 11797 Rev2aa10 2005 ...

Page 2: ... Signal to noise ratio 72dBA reference 1W into 4 ohms Dynamic power 1516W channels 2 ohms Effective damping factor 6 357 4 ohms Frequency response 17Hz 302Hz 3dB Maximum input signal 5 7V Maximum sensitivity Reference 1210a 260mV Reference 1211a 75mV DC Offset 50mV 50 Output regulation 132dB 4 ohms Idle Current 2 8A Input Impedance 22kΩ Max Current Draw 70A 4 ohms 125A 2 ohms Dimensions 12 x 18 1 ...

Page 3: ...test for all measurements unless otherwise specified The voltage applied to the unit shall be measured at the power connection on the Amplifier x Signal Source Unless otherwise specified all tests shall be conducted with the Audio Signal Generator output configured to be balanced less than or equal to 50 ohm source impedance and floating The signal source GND shall be connected to the Amplifier PW...

Page 4: ...e to adequately protect the positive wire from potential damage may result in a vehicle fire When you are done routing and connecting this wire to the battery and to the amplifier you may install the fuse at the battery The fuse value should be selected based on total amplifier current draw see chart at right REMOTE CONNECTION Connect the amplifier s Remote REMOTE terminal to the source unit s Rem...

Page 5: ...ect multiple woofers Either set of terminals may be used when connecting woofers To the right are two application diagrams to help plan your subwoofer system installation Figures 3 and 4 show how to configure the Reference subwoofer amplifiers models 311a 611a and 1211a NOTE For simplicity Figures 3 and 4 do not show power remote and input connections NOTE Minimum speaker load is 2 ohms APPLICATIO...

Page 6: ...e 7 REMOTE LEVEL CONTROL OPTIONAL All three Reference subwoofer amplifiers and the 5761a amplifier have inputs for an optional remote level control 100rc This will allow the subwoofer level to be adjusted from the listening position Connect the optional remote level control using the RJ 11 jack on the side of the amplifier Install the control module in the front of the vehicle within easy reach of...

Page 7: ...HP FREQ between 35Hz and 45Hz adjust the BOOST control according to your preference For tighter sounding bass adjust the HP FREQ between 45Hz and 55Hz adjust the BOOST control according to your preference For vented enclosures the DBO should be used as a subsonic filter to reduce overexcursion of the woofers Set the HP FREQ control 10Hz below the tuning frequency of the enclosure e g 25Hz for a bo...

Page 8: ...EDs flash CAUSE and SOLUTION Voltage less than 9V on BATT connection Check vehicle charging system PROBLEM No audio PROTECT LED is on CAUSE and SOLUTION Voltage greater than 16V or less than 8 5V on BATT connection Check vehicle charging system PROBLEM Distorted audio CAUSE and SOLUTION Input sensitivity is not set properly or amplifier or source unit is defective Check INPUT LEVEL setting or chec...

Page 9: ...Power Amplifier Reference 1210a 1211a 8 ...

Page 10: ...Reference 1210a 1211a 9 ...

Page 11: ...Power Amplifier Reference 1210a 1211a 10 ...

Page 12: ...REFERENCE 1210A 1211a BLOCK DIAGRAM Power Amplifier Reference 1210a 1211a 11 ...

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Page 16: ...Power Amplifier Reference 1210a 1211a 15 ...

Page 17: ...WJ 15K OHM R121 126 2 RES 00 00630RESISTOR CARBON FILM 1 5WJ 18K OHM R415 1 RES 00 00658RESISTOR CARBON FILM 1 5WJ 22K OHM R101 102 2 RES 00 00666RESISTOR CARBON FILM 1 5WJ 27K OHM R417 1 RES 00 00680RESISTOR CARBON FILM 1 5WJ 30K OHM R124 1 RES 00 00730RESISTOR CARBON FILM 1 5WJ 56K OHM R270 271 2 RES 00 00757RESISTOR CARBON FILM 1 5WJ 82K OHM R169 1 RES 00 00604RESISTOR CARBON FILM 1 5WJ 100K OH...

Page 18: ...IC SHL 2200 50V C208 210 308 310 4 ELC 00 00716CAPACITOR ELECTROLYTIC LXZ 3300 25V C50 51 52 53 54 5 ELC 00 00033CAPACITOR ELECTROLYTIC HC 8200 50V C76 86 2 MYC 00 0010CAPACITOR MYLAR 10 100V BOX TYPE 105K C92 93 207 219 220 307 6 MYC 00 0007CAPACITOR MYLAR 10 100V BOX TYPE 225K C78 88 212 213 312 313 6 MYC 00 0010CAPACITOR MYLAR 10 250V BOX TYPE 225K C223 820 2 COI 00 00086 INDUCTOR DRUM COIL CL ...

Page 19: ...87TRANSISTOR SMALL SIGNAL PNP KTA1023Y Q1 1 TRS 00 00090TRANSISTOR SMALL SIGNAL PNP KTA1266GR Q7 8 9 10 4 RES 00 00038RESISTOR METAL FILM 1 2WJ 220 OHM R36 37 2 ELC 00 00250CAPACITOR ELECTROLYTIC SRE 4 7uF 50V C4 9 11 17 23 5 ELC 00 00641CAPACITOR ELECTROLYTIC SRE 22uF 16V C15 16 2 ELC 00 00243CAPACITOR ELECTROLYTIC SRE 100uF 16V C10 12 2 MYC 00 00020CAPACITOR MYLAR 5 100V 102J C13 1 HED 00 00100H...

Page 20: ... 220 OHM R203 1 2 RES 00 00590RESISTOR METAL FILM 1 5WF 910 OHM R202 206 2 4 RES 00 00636RESISTOR CARBON FILM 1 5WJ 1 OHM R207 208 211 212 4 8 RES 00 00685RESISTOR CARBON FILM 1 5WJ 330 OHM R420 421 2 4 RES 00 00637RESISTOR CARBON FILM 1 5WJ 2 2K OHM R201 205 2 4 CEC 00 00076CAPACITOR CERAMIC DISK 50V 104pF C201 202 204 205 4 8 MYC 00 00088CAPACITOR MYLAR 5 63V TL TYPE 224J C203 206 2 4 RES 00 010...

Page 21: ... REF 1210a RESISTOR RES 00 00482 1 5WF 2K OHM R117 2 REF 1211a RESISTOR RES 00 00577 1 5WF 750 OHM R117 REF 1210a RESISTOR RES 00 00575 1 5WF 7 5K OHM R118 3 REF 1211a RESISTOR RES 00 00402 1 5WF 10K OHM R118 REF 1210a POWER TERMINAL TER 00 00163 3P DST0010 00 TER1 3 REF 1211a POWER TERMINAL TER 00 00278 3P DK 03B04 AG 5 UP TER1 REF 1210a SPEAKER TERMINAL TER 00 00034 4P TM0009 01 TER2 4 REF 1211a...

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Page 28: ...Protect LED 27 ...

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Page 31: ...30 REF 1211a SCHEMATIC PAGE 1 Power Amplifier Reference 1211a ...

Page 32: ...31 REF 1211a SCHEMATIC PAGE 2 Power Amplifier Reference 1211a ...

Page 33: ...32 REF 1211a SCHEMATIC PAGE 3 Power Amplifier Reference 1211a ...

Page 34: ...Power Amplifier Reference 1210a 1211a 33 PACKING EXPLODED VIEW ...

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