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PESA DA3000 Manual

Audio distribution amplifier
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DA3000
Audio Distribution Amplifier
PESA Switching Systems
330A Wynn Drive
Huntsville, AL 35805
Document No. 81-9059-0306-0 Rev. E

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Summary of Contents for PESA DA3000

  • Page 1 DA3000 Audio Distribution Amplifier PESA Switching Systems 330A Wynn Drive Huntsville, AL 35805 Document No. 81-9059-0306-0 Rev. E...
  • Page 2 Manual Updates: 1/31/95 Manual released for initial printing as Rev A. 8/14/95 Manual released as Rev B to incorporate changes in Section 4, Section 6, and Section 7. 11/10/95 Manual released as Rev C to incorporate PRCO-0313 changes. 6/15/97 Manual released as Rev D to incorporate ECO changes. 03-01-01 Rev E: Deleted Printing Specification per ECO CE00113.
  • Page 5 ALL EQUIPMENT ITEMS MANUFAC- TURED BY OR SOLD BY PESA SWITCHING SYSTEMS, INC. SHOULD BE SERVICED BY QUALIFIED SER- VICE PERSONNEL OR BY QUALIFIED SERVICE TECHNICANS ONLY.

  • Page 6: Table Of Contents

    DA3000 Audio Mainframe Specifications ......... 1.3 ADA3001 Audio Board Specifications ........1.4 ADA3002 Audio Board Specifications ........1.5 Figures Figure 1-1 DA3000 Audio Mainframe Front View ........ 1.2 Figure 1-2 DA3000 Audio Mainframe Rear View ........ 1.2 Section 2. Installation Introduction ................2.1 Receipt Inspection ..............
  • Page 7 Figure 3-1 Gain Adjust Range Switch ..........3.1 Figure 3-2 Gain Adjust Range Switch ..........3.5 Section 4. Functional Introduction ................4.1 DA3000 Audio Backplane ............4.1 Input/Output ................ 4.1 Power Distribution ............... 4.1 ADA3001 Audio Board.............. 4.2 Power ................. 4.2 Input and Gain ..............
  • Page 8 General ................6.1 DA3000 Audio Mainframe Front View ........6.2 DA3000 Audio Mainframe Rear View ........6.3 DA3000 Audio Mainframe Assembly ..CD63-0738 .... 6.4 DA3000 Audio Backplane ......CA25-1242 .... 6.6 ............SC33-1242 .... 6.7 DA3000 Chassis Assembly ...... CD63-0739 .... 6.8 ADA3001 and ADA3002 Audio Boards ..
  • Page 9 General ................7.1 ADA3000 Mainframe ........ 81906516670..7.2 DA3000 Chassis ........81906516680..7.3 DA3000 Audio Backplane ......81906516700..7.4 ADA3001 Audio Distribution Amplifier ..81906516720..7.5 ADA3002 Audio Distribution Amplifier ..81906517330..7.7 PS45A Audio Power Supply (US) ..... 81906516760..7.9 PS45A Audio Power Supply (OUS) ..

  • Page 10: Da3000 Audio

    1.1 Manual Overview This manual provides detailed instructions for installing and operating the PESA DA3000 Audio Mainframe. This manual is divided into seven sections as shown. Sections 3 and 4 contain in-depth operational and functional descriptions of the DA3000 Audio Mainframe and the associated Audio Distribution Boards.

  • Page 11: General Description

    DA3000 Audio 1.2 General Description The DA3000 Audio Mainframe is the heart of PESA's new line of low cost audio distribution amplifiers. The DA3000 Audio Mainframe is housed a 2RU chassis with ten audio card slots. Audio signals can be distributed into 600 ohms or 66 ohms by selecting the appropriate plug-in cards.

  • Page 12: Da3000 Audio Mainframe Specifications

    Introduction Section 1 DA3000 Audio 1.3 DA3000 Audio Mainframe Specifications INPUT CHARACTERISTICS Input Type Looping Inputs Connector Type 3-Pin Connector OUTPUT CHARACTERISTICS Number 8 Per Channel Connector Type 3-Pin Connector CARDS Number 10 Per Chassis ENVIRONMENTAL - Operational Temperature 0°C to 40°C...

  • Page 13: Ada3001 Audio Board Specifications

    Introduction Section 1 DA3000 Audio 1.4 ADA3001 Audio Board Specifications INPUT CHARACTERISTICS Level +30dBm Max. Impedance >50K Ohm Coupling Type Balanced Connector Type 3-Pin, 2-Part Detachable Common Mode Rejection >90dB @ 60Hz >60dB to 20KHz Common Mode Level ±20V OUTPUT CHARACTERISTICS...

  • Page 14: Ada3002 Audio Board Specifications

    Introduction Section 1 DA3000 Audio 1.5 ADA3002 Audio Board Specifications INPUT CHARACTERISTICS Level +30dBm Max. Impedance >50K Ohm Coupling Type Balanced Connector Type 3-Pin, 2-Part Detachable Common Mode Rejection >90dB @ 60Hz >60dB to 20KHz Common Mode Level ±20V OUTPUT CHARACTERISTICS...

  • Page 15: Section 2. Installation

    2.3 Unpacking The DA3000 Audio Mainframe is comprised of a frame, backplane, up to two audio power supplies, and up to ten audio distribution boards. The audio boards can be any combination of ADA3001 Audio Boards and ADA3002 Audio Boards.

  • Page 16: Location

    2.5 Mounting The DA3000 Audio Mainframe is rack mounted in a standard 19” equip- ment rack. Sufficient space must be provided behind the rack to allow for the audio and power cables to be installed. All mounting holes should be utilized and mounting hardware tightened securely.

  • Page 17: Cabling

    Installation Section 2 2.6 Cabling Considerable weight will be added to the rear panel of the DA3000 Audio Mainframe by the audio cables and power cables. Therefore, all cables should be strained relieved and secured to racks or other supporting structures.

  • Page 18: Plug-In Audio Card Installation

    600 ohm loads. Both audio distribution boards can accept input signal levels up to +30dBm. To install a Audio Board in the DA3000 Audio Mainframe take the follow- ing steps while referring to Figure 2-3: 1. Align the Audio Board with a set of circuit card guides in either the center or left-hand compartment of the frame.

  • Page 19: Audio Power Supply Installation

    To install a PS45 Power Supply in the DA3000 Audio Mainframe take the following steps while referring to Figure 2-5: 1.

  • Page 20: Front Panel Installation

    To install the access door (front panel) of the DA3000 Audio Mainframe refer to Figure 2-6 and take the following steps: 1. Align the front panel to the front of the DA3000 Mainframe Assembly. 2. Now slide the front panel onto the mainframe assembly until the slide locks snap into place.

  • Page 21: Rear Panel Connectors

    The alarm connector, located on the backplane, allows connection of the external alarm. The fan is also enabled when PS70A Power Supplies are installed in the DA3000 Audio Mainframe. 12/94...

  • Page 22: Dc Power Connector

    2.10 Rear Panel Connectors Continued: DC Power Connector Power can be supplied to the DA3000 Audio Mainframe through an exter- nally mounted power supply or from internal power supplies. The DC Power Connector can be used as DC power input (external power supply) or as DC power output (internal power supplies) to allow the audio distri- bution amplifier frame to power additional equipment items.

  • Page 23: Figure 2-8 Sample System Connections

    DA3000 Audio Installation Section 2 2.11DA3000 Audio Mainframe System Conn. Cont: Figure 2-8 Sample System Connections 12/94 INSTALLATION P/N 81905903060 page 2.9...

  • Page 24: Introduction

    Operations Section 3 3.1 Introduction The operation of the DA3000 Audio Mainframe consists of applying power to the chassis and monitoring the associated audio distribution amplifier cards and power supplies. This section describes the operation and adjustment of each type of audio distribution amplifier card.

  • Page 25: Ada3001 Audio Board Adjustment

    DA3000 Audio Operations Section 3 3.3 ADA3001 Audio Board Adjustment Though the ADA3001 Audio Boards are tested and adjusted before shipment from the factory readjustment may be necessary when parts are replaced or equipment configuration changes. Refer to Component Assembly, ADA30001 and ADA3002 Audio Boards, page 6.9 for ADA3001 adjustment locations.

  • Page 26: Dc Offset (R8)

    DA3000 Audio Operations Section 3 3.3 ADA3001 Audio Board Adjustment Continued: DC Offset (R8) The DC Offset is adjusted with no input signal applied to the ADA3001 Audio Board. To adjust the DC Offset level take the following steps: 1. Disconnect the input and terminate (or short) the input.

  • Page 27: Gain (R4 And R17)

    3.4 ADA3002 Audio Board Operation The operation of the ADA3002 Audio Distribution Board consists of plugging the board into the DA3000 Audio Mainframe and powering the mainframe up. The operation of the ADA3002 Audio Board also consists of setting the Gain Adjust Range Switch (S1) to the appropriate range.

  • Page 28: Gain Adjust Range Switch (S1)

    DA3000 Audio Operations Section 3 3.4 ADA3002 Audio Board Operation Continued: Gain Adjust Range Switch (S1) The Gain Adjust Range Switch is four position dip switch that allows the customer to select the gain range of the ADA3002 Audio Distribution Amplifier Board.

  • Page 29: Voltage (R1 And R32)

    DA3000 Audio Operations Section 3 3.5 ADA3002 Audio Board Adjustment Continued: Voltage (R1 and R32) The voltage adjustments provide a means of adjusting the output of ADA3002 Board's voltage regulators. To make the voltage adjustments take the following steps: 1. Connect the digital multimeter between pin 3 of U1 and ground. Be careful not to short the pins of U1 together.

  • Page 30: Common Mode Rejection Ratio Cmrr (R35 And R36)

    DA3000 Audio Operations Section 3 3.5 ADA3002 Audio Board Adjustment Continued: Common Mode Rejection Ratio CMRR (R35 and R36) The input common mode rejection ratio adjustment provides a means to eliminate unwanted noise and hum on the audio distribution board's outputs.

  • Page 31: Gain (R4 And R17)

    DA3000 Audio Operations Section 3 3.5 ADA3002 Audio Board Adjustment Continued: Gain (R4 and R17) The gain adjustments enables the customer to adjust the level of the output signal to match the level of the input signal (unity gain) or to a customer preferred output level between -3dB and +31dB .

  • Page 32: Section 4. Functional

    PS45 Audio Power Supply 4.2 DA3000 Audio Backplane The DA3000 Audio Backplane's electronic circuitry is divided into the in- put/output circuits and the power distribution circuits. The backplane's function is to provide the passive ins to the individual audio distribution boards, passive outs from the audio distribution boards, and to route power and ground to the individual audio distribution boards.

  • Page 33: Ada3001 Audio Board

    DA3000 Audio Functional Section 4 4.3 ADA3001 Audio Board The ADA3001 is a general purpose four stage audio distribution amplifier with a high input impedance and eight 66 ohm outputs. The electronic cir- cuitry of the ADA3001 Audio Distribution Amplifier Board is divided into the power, input, gain, inverter, and output circuits.

  • Page 34: Inverter And Output

    DA3000 Audio Functional Section 4 4.3 ADA3001 Audio Board Continued: Inverter and Output The output circuit consists of two identical output drivers plus an inverter amplifier. The inverter is an unity gain amplifier used to provide a bal- anced output by inverting the input signal to one of the identical output drivers.

  • Page 35: Input And Gain

    4.5 PS45 Audio Power Supply The PS45 Audio Power Supply is an unregulated power source that sup- plies plus and minus DC voltages to DA3000 Audio Mainframe and the as- sociated circuit cards. Both the 115VAC (US) and 220VAC (OUS) models of the PS45 Audio Power Supply are similar in design so only one model is discussed here.

  • Page 36: Circuit Description

    C1 and C2. R2 and R3 supply a mini- mum power supply load if the DA3000 Audio Mainframe is empty. After the filters, series diodes are used (D5, D6, D8, and D9) to allow the power supply to be paralleled for redundancy.

  • Page 37: Section 5. Maintenance

    Service information in the front of the manual. Section 6 contains component layout drawings and schematics for assistance in trouble- shooting and Section 7 contains the lists of replacement parts for repair- ing the DA3000 Audio Mainframe, the Audio Distribution Boards, and the PS45A Power Supplies. 5.2 Preventive Maintenance...

  • Page 38: Test Equipment

    If desired, equipment or boards may be returned to the factory (transporta- tion prepaid) for repair. Refer to the General Assistance and Service information sheet in the front of this manual. Call the PESA Service De- Þ partment for a RMA number before shipping an equipment item.

  • Page 39: Troubleshooting

    Power Supplies review sections 3 and 4 of this manual. Use the functional descriptions and adjustment procedures to quickly locate problems. If all of the audio outputs from a DA3000 Audio Mainframe are missing, check the PS45A Power Supply System and the power supply line fuses. See Section 5.5 for fuse replacement details.

  • Page 40: Figure 5-1 Fuse Location On The Ps45A Power Supply

    DA3000 Audio Maintenance Section 5 5.5 Power Supply Fuse Replacement Continued: Figure 5-1 Fuse Location on the PS45A Power Supply 12/94 M A INT ENANCE page 5.4 P/N 81905903060...

  • Page 41: Section 6. Schematics

    Schematics Section 6 6.1 Schematics General This section contains the schematic diagrams and parts location diagrams for the DA3000 Audio Mainframe. Please refer to this section when troubleshooting the equipment or replacing defective parts. Description Dwg No. Page No. DA3000 Audio Mainframe Front View...
  • Page 42 DA3000 Audio Schematics Section 6 DA3000 Audio Mainframe Front View 6/97 P/N 81905903060 page 6.2 SCHE M A TI C S...
  • Page 43 DA3000 Audio Schematics Section 6 DA3000 Audio Mainframe Rear View 6/97 P/N 81905903060 page 6.3 SCHE M A TI C S...
  • Page 44 DA3000 Audio Schematics Section 6 Configuration Drawing (Sheet 1 of 2) • DA3000 Audio Mainframe Assembly (REV B) • CA63-0738 6/97 P/N 81905903060 page 6.4 SCHE M A TI C S...
  • Page 45 DA3000 Audio Schematics Section 6 Configuration Drawing (Sheet 2 of 2) • DA3000 Audio Mainframe Assembly (REV B) • CA63-0738 6/97 P/N 81905903060 page 6.5 SCHE M A TI C S...
  • Page 46 DA3000 Audio Schematics Section 6 Component Assembly • DA3000 Audio Backplane (REV A) • CA25-1242 6/97 P/N 81905903060 page 6.6 SCHE M A TI C S...
  • Page 47 DA3000 Audio Schematics Section 6 Schematic • DA3000 Audio Backplane (REV B) • SC33-1242 6/97 P/N 81905903060 page 6.7 SCHE M A TI C S...
  • Page 48 DA3000 Audio Schematics Section 6 Configuration Drawing • DA3000 Chassis Assembly (REV A) • CD63-0739 6/97 P/N 81905903060 page 6.8 SCHE M A TI C S...
  • Page 49 DA3000 Audio Schematics Section 6 Component Assembly (Sheet 1 of 2) • ADA3001 and ADA3002 Audio Boards (REV B) • CA25-1244 6/97 P/N 81905903060 page 6.9 SCHE M A TI C S...
  • Page 50 DA3000 Audio Schematics Section 6 Component Assembly (Sheet 2 of 2) • ADA3001 and ADA3002 Audio Boards (REV B) • CA25-1244 6/97 P/N 81905903060 page 6.10 SCHE M A TI C S...
  • Page 51 DA3000 Audio Schematics Section 6 Schematic (Sheet 1 of 2) • ADA3001 and ADA3002 Audio Boards (REV D) • SC33-1244 6/97 P/N 81905903060 page 6.11 SCHE M A TI C S...
  • Page 52 DA3000 Audio Schematics Section 6 Schematic (Sheet 2 of 2) • ADA3001 and ADA3002 Audio Boards (REV D) • SC33-1244 6/97 P/N 81905903060 page 6.12 SCHE M A TI C S...
  • Page 53 DA3000 Audio Schematics Section 6 Component Assembly • Power Supply PCB (US) (REV 07) • CA25-1245 6/97 P/N 81905903060 page 6.13 SCHE M A TI C S...
  • Page 54 DA3000 Audio Schematics Section 6 Schematic • Power Supply PCB (US) (REV 05) • SC33-1245 6/97 P/N 81905903060 page 6.14 SCHE M A TI C S...
  • Page 55 DA3000 Audio Schematics Section 6 Component Assembly • Power Supply PCB (OUS) (REv 03) • CA25-1272 6/97 P/N 81905903060 page 6.15 SCHE M A TI C S...
  • Page 56 DA3000 Audio Schematics Section 6 Schematic • Power Supply Board (OUS) (REV 01) • SC33-1272 6/97 P/N 81905903060 page 6.16 SCHE M A TI C S...
  • Page 57 7.1 Parts List General The Parts List in this section have been grouped according to each as- sembly associated with the DA3000 Audio Mainframe. Refer to each list by name of card, board, or section of the equipment requiring replacement parts.
  • Page 58 DA3000 Audio Parts List Section 7 ADA3000 Audio Mainframe Assembly (REV C) - 81906516670 81902003300 FAN GUARD DA3000 MAINFRAME 81902101468 LABEL EQUIP SERIALIZATION 81902104720 COVER BACKPLANE PWR BLK PLAS 81902200088 WASHER #4 FLAT 81902202704 SCREW 4-40 X 3/8 PAN HEAD SIMM...
  • Page 59 DA3000 Audio Parts List Section 7 DA3000 Chassis (REV D) - 81906516680 81902003227 LATCH SLIDE BLACK TAB CEI 81902202940 RIVET 120 DEGREE CENTER-SINK 81903463270 TRAY DA3000 81903463280 TOP PANEL DA3000 81903463290 VERTICAL PLATE LEFT DA3000 81903463300 VERTICAL PLATE RIGHT DA3000...
  • Page 60 DA3000 Audio Parts List Section 7 ADA3000 Audio Backplane (REV A) - 81906516700 81902105050 LABEL BARCODE 1.5" X 0.25" 81902412420 PCB BACKPLANE DA3000 AUDIO 81902901594 CONN MNL 6-POSITION FEMALE 81902903160 HEADER 2-PIN MTA LOCKING 81902906353 CONN 3-POS MALE POLAR STAR...
  • Page 61 81902105050 LABEL BARCODE 1.5" X 0.25" 81902105540 BERGQUIST 0.080 GAP PAD VO 81902202712 SCREW 4-40 X 5/16 SIMM PAN HEAD 81902412440 PCB DA3000 AUDIO CARD 81902907240 CONN 32-POS MALE RT/A 16X2 81903463610 SHIELD DA3000 AUD/VID 81903465170 AL SPACER/HEAT SPREADER 81906600903...
  • Page 62 Parts List Section 7 ADA3001 Audio Board (REV F) - 81906516720 Continued: 81906920030 SWITCH DIP 4-POS GULL-WING SWX1 CA25-1244 DOC ASSY DA3000 AUDIO CARD NOT-PLACED ITEMS NOT-PLACED ON EBOM R11 R34 R36 SC33-1244 DOC ASSY DA3000 AUDIO CARD 6/97 P ARTS LISTS page 7.6...
  • Page 63 81902105050 LABEL BARCODE 1.5" X 0.25" 81902105540 BERGQUIST 0.080 GAP PAD VO 81902202712 SCREW 4-40 X 5/16 SIMM PAN HEAD 81902412440 PCB DA3000 AUDIO CARD 81902907240 CONN 32-POS MALE RT/A 16X2 81903463610 SHIELD DA3000 AUD/VID 81903465170 AL SPACER/HEAT SPREADER 81906600903...
  • Page 64 Parts List Section 7 ADA3002 Audio Board (REV F) - 81906517330 Continued: 81906920030 SWITCH DIP 4-POS GULL-WING SWX1 CA25-1244 DOC ASSY DA3000 AUD CARD NOT-PLACED ITEMS NOT PLACED ON EBOM C34 C36 SC33-1244 DOC ASSY DA3000 AUD CARD 6/97 P ARTS LISTS page 7.8...
  • Page 65 DA3000 Audio Parts List Section 7 Power Supply PCB (US) (REV 05) - 81906516760 81900200700 RESISTOR 1.5K 5% 1/4W 81900200866 RESISTOR 6.8K 5% 1/4W R2 R3 81900700055 CAP 0.1MF 50V CERAMIC RADIAL 81901000820 CAP ELECT 4700UF TO 5600UF C1 C2...
  • Page 66 DA3000 Audio Parts List Section 7 Power Supply PCB (OUS) (REV 04) - 81906517310 81900200700 RESISTOR 1.5K 5% 1/4W 81900200866 RESISTOR 6.8K 5% 1/4W R2 R3 81900700055 CAP 0.1MF 50V CERAMIC RADIAL 81901000820 CAP ELECT 4700UF TO 5600UF C1 C2...

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