Infinity 310a Service Manual
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Infinity 310a Service Manual

1 channel power amplifier reference series
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Reference Series
310a
311a

1 CHANNEL POWER AMPLIFIER

SERVICE MANUAL

Infinity Systems, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797
Rev2aa10/2005

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Summary of Contents for Infinity 310a

  • Page 1: Channel Power Amplifier

    Reference Series 310a 311a 1 CHANNEL POWER AMPLIFIER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev2aa10/2005...
  • Page 2 (L x W x D) (305mm x 290mm x 68mm) Fuse: Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in this and related publications are therefore subject to change without notice.
  • Page 3 Reference 310a/311a...
  • Page 4 Power Amplifier Reference 310a/311a OWER ONNECTIONS WIRE-GAUGE CHART The Reference amplifiers are capable of Amplifier Maximum Minimum delivering high power levels, and require a Model Current Draw Wire Gauge reliable connection to the vehicle’s electrical system in order to perform optimally. See Figure 1 for connection location.
  • Page 5 Reference 310a/311a Power Amplifier – 310a/311a PPLICATIONS The Reference subwoofer amplifiers are single-channel amplifiers. There are two sets of terminals to make it easy to connect 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.
  • Page 6 Power Amplifier Reference 310a/311a NSTALLATION AND ETUP SETTING INPUT SENSITIVITY REMOTE LEVEL CONTROL (OPTIONAL) All three Reference subwoofer amplifiers and 1. Initially turn the INPUT LEVEL control(s) to the 5760a amplifier have inputs for an optional minimum (counterclockwise). remote level control (100rc). This will allow the 2.
  • Page 7 Reference 310a/311a Power Amplifier NSTALLATION AND ETUP CONT SETTING DBO ™ STATUS LEDs The Dynamic Bass Optimizer (DBO) is used to Clip: Indicates the amplifier is being overdriven, enhance low-frequency reproduction in a vehicle. and your speakers may be in danger. This...
  • Page 8 Power Amplifier Reference 310a/311a ROUBLESHOOTING • PROBLEM: • PROBLEM: No audio (POWER LED is off). No audio (PROTECT LED is on). CAUSE and SOLUTION: CAUSE and SOLUTION: No voltage at BATT+ and/or REM terminals, or Voltage greater than 16V or less than 8.5V on bad or no ground connection.
  • Page 9 Reference 310a/311a...
  • Page 10 Reference 310a/311a...
  • Page 11 Reference 310a/311a Mechanical Parts List HEA-01-182AB HEAT SINK-MAIN AL/EXTRUSION(L=290.0mm) side:P432C sandton spray,top:silver spray/1 silk screen PAN-06-279AA PANEL-FRONT EGI, 1.2t P432C Painting & silk screen PAN-06-274AB PANEL-REAR EGI, 1.2t P432C Painting & silk screen COV-06-108AA COVER-BOTTOM EGI, 1.2t P432C Painting COV-22-551AA...
  • Page 12 Reference 310a/311a Power Amplifier Ref 310a/311a BLOCK DIAGRAM...
  • Page 13 Reference 310a/311a V-CUT V-CUT TM0006-01 TM0009-01 TER02 TER01 7.5m/m WF-9402 7.5m/m WIRE 7.5m/m 104(M) 60m/m 20m/m 6m/m FH01 7.5m/m C3198GR 20m/m 7.5m/m 6m/m 20m/m 8.2K 6m/m J330 C801 J300 C3198GR 473P A1266GR J301 J302 3.9K 680/2W 1N5404 R198 C14 47/16V 104(M) 4.7/0.5W...
  • Page 14 Reference 310a/311a V - C U T V - C U T VR103 J252 MOD01 VR102 VR101 VR104 R101 R201 R226 R222 R223 R250 C225 R221 R229 R143 R206 J110 C219 J107 C223 R230 R107 R141 U106 U104 U103 C206...
  • Page 15 Reference 310a/311a...
  • Page 16 Reference 310a/311a Electrical Parts List FET-00-00045 F.E.T MUTTING J-FET J108 Q82,151 TRS-00-00087 TRANSISTOR SMALL SIGNAL PNP KTA1023Y Q01,173,174,175 TRS-00-00088 TRANSISTOR SMALL SIGNAL NPN KTC1027Y Q163,164,165,171 TRS-00-00091 TRANSISTOR SMALL SIGNAL PNP KTA1268GR Q22,154,155,161,162 TRS-00-00111 TRANSISTOR SMALL SIGNAL NPN KTC3200GR Q152,153,156,187 TRS-00-00090...
  • Page 17 Reference 310a/311a Electrical Parts List cont'd ELC-00-00218 CAPACITOR ELECTROLYTIC "SMS" 1/50V C163,220 ELC-00-00223 CAPACITOR ELECTROLYTIC "SMS" 2.2/50V C150,151 ELC-00-00229 CAPACITOR ELECTROLYTIC "SMS" 4.7/50V C143,219,243 ELC-00-00195 CAPACITOR ELECTROLYTIC "SMS" 10/16V ELC-00-00203 CAPACITOR ELECTROLYTIC "SMS" 10/25V ELC-00-00220 CAPACITOR ELECTROLYTIC "SMS" 10/50V ELC-00-00197 CAPACITOR ELECTROLYTIC "SMS"...
  • Page 18 Reference 310a/311a Electrical Parts List cont'd DIO-00-00152 DIODE FAST RECOVERY YG225D2 D41,42 DIO-00-00048 DIODE RECTIFIER 1N5404 DIO-00-00206 DIODE ZENER 1W 15V 1N4744A D911,921 RES-00-01223 RESISTOR 100 OHM MOR/S 2WJ RES-00-01270 RESISTOR MOR/S 2WJ 220 OHM R911,921 RES-00-01041 RESISTOR MOR/S 2WJ...
  • Page 19 Reference 310a/311a Power Amplifier Reference 311a Electrical Parts List Addendum The following chart below represents the only electrical parts differences in 310a and 311a models: MODEL PART NAME PART NAME SPEC DESIGNATOR REF 310a RESISTOR RES-00-00586 1/5WF 820 OHM R210...
  • Page 20 Reference 310a/311a...
  • Page 21 Reference 310a/311a Power Amplifier...
  • Page 22 Reference 310a/311a...
  • Page 23 Reference 310a/311a REF 310a Schematic Page 1 B+SW 14.4V 13.64V 13.55V FH01 A1023Y CL-300 10/0.5W DC12V DC12V 10/16V 1N5404 4.7K TER01 TERMINAL 3P 430K 4.7K 1N4004 C3198GR D51 FR154 C801 VCC1 473P 8.2K D52 FR154 47/50V D53 FR154 47/50V 4.7KF 10.5KF...
  • Page 24 Reference 310a/311a REF 310a Schematic Page 2 15.86V R911 220/2W C105 VCC1 C102 R102 R105 C913 C912 D911 C911 22/16V 47KF 47KF 330/16V 104P 1N4744 330/16V R107 C108 LOW INPUT R-CH R101 C104 9.4KF 470P RCA101-A 22KF DJB-554A C103 R103...
  • Page 25 Power Amplifier Reference 310a/311a B+SW FH01 A1023Y CL-300 10/0.5W DC12V DC12V 10/16V 1N5404 4.7K TER01 TERMINAL 3P 430K 4.7K 1N4004 C3198GR D51 FR154 C801 VCC1 473P 8.2K D52 FR154 47/50V D53 FR154 47/50V 4.7KF 10.5KF D54 FR154 VEE1 FQP50N06 104P...
  • Page 26 Power Amplifier R911 220/2W C105 VCC1 Reference 310a/311a C102 R102 R105 C913 C912 D911 C911 22/16V 47KF 47KF 330/16V 104P 1N4744 330/16V R107 C108 LOW INPUT R-CH R101 C104 9.4KF 470P RCA101-A 22KF DJB-554A C103 R103 U101-A 32Hz-320Hz/12dB oct LPF...
  • Page 27 Reference 310a/311a PACKING EXPLODED VIEW...

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