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Logitek

TRU-VU
LED Audio Level Display

Operation & Service Manual

Logitek Software License Agreement
The Tru-VU unit you have purchased contains embedded software. The software is owned by Logitek Electronic Systems, Inc. and is protected by United States copyright laws and international treaty provisions. Logitek grants to you the right to use one copy of the embedded software in each Tru-VU meter you purchase. You may not rent or lease the software. You may not reverse engineer, decompile, disassemble, or create derivative works from the software. You may not create copies of the software. This statement will be governed by the laws of the State of Texas, U.S.A. Logitek reserves all rights not specifically granted in this statement.

All information contained herein is confidential. No portions of this manual may be reproduced by any means without written permission from Logitek Electronic Systems, Inc.

COPYRIGHT 1999, LOGITEK ELECTRONIC SYSTEMS, INC.

Tru-VU LED Meter INSTRUCTION MANUAL Table of Contents
SECTION 1 -- GENERAL INFORMATION
1-1 1-2 1-3 1-4 2-1 2-2 2-3 2-4 2-5 2-6 2-7 3-1 3-2 3-3 3-4 4-1 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 5-1 5-2 5-3 5-4 5-6 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Instrument Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Where to find help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Claims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Repacking for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connecting Mains Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connecting Digital Input Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connecting Analog Input Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Bargraph Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Display Ballistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Resetting the Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Fuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Handling of CMOS Integrated Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Access to Circuit Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 DSP Control Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Analog Input Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Digital Input Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 LED Display Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 DSP Control Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Analog Input Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Digital Input Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 LED Display Card (Master) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

SECTION 2 -- PREPARATION FOR USE

SECTION 3 -- OPERATING INSTRUCTIONS

SECTION 4 -- SERVICING

SECTION 5 -- REPLACEMENT PARTS LIST

SECTION 6 -- MANUFACTURERS LIST SECTION 7 -- DIAGRAMS

SECTION 1 -- GENERAL INFORMATION
1-1 General Description The Logitek Tru-VU is a bargraph type audio level meter featuring two curved LED bargraphs. Average is displayed as a solid bar. PPM is displayed as a single dot. The meters accept either analog audio or serial digital inputs and are available in two 19 inch rack mount configurations, both with internal power supplies. 1-2 Electrical Specifications Indicators per bargraph: 25 Scale Range: -35 dB to +16 dB 0 dB Reference Point: Analog Input adjustable -20 to +10 dBu Digital Input -20 dB full scale Response Time: VU Mode 300 mSec / 20 dB attack 300 mSec / 20dB release PPM Mode 0 mSec attack 2.8 Sec / 24 dB release Frequency Response: + - .1dB (20 - 20K hz) Analog Input: Sensitivity -10 to +20 dBU for full scale rear panel adjustable Overload Level +24 dBm Impedance 40K Ohm balanced 20K Ohm unbalanced CMRR -80 dBu Connector Female 3-pin XLR Digital Input: Codes Impedance Loop-through Termination Connector 1-3 Instrument Identification The Tru-VU is identified by a model number and a three or four digit serial number. The model number and serial number appear on a label on the back of the unit near the power cord. All correspondence to your Logitek dealer or to the Logitek factory should refer to the model number and serial number. 1-4 Where to find help Logitek customer service personnel are available to help with any questions, comments or problems you might have with the Tru-VU meter, both during and after the warranty period. Our hours of operation are 8AM to 5PM central time. We may be contacted in one of the following ways: By Phone: 877-231-5870 (U.S.A. & Canada) or 713-664-4470 By Fax: 713-664-4479 By E-mail: [email protected] By Mail: Logitek Electronic Systems, Inc. 5622 Edgemoor Drive Houston, TX 77081 USA

AES/EBU, S/PDIF 110 Ohm balanced 75 Ohm unbalanced 2200 Ohm balanced transformer balanced Female 3-pin XLR (IN) Male 3-pin XLR (OUT)

AC Line Input Voltage: 50-60 Hz (switch settable) Power Requirement: TVU2-(all) TVU4-(all) Dimensions: 1RU enclosure

105-129 VAC or 220-240 VAC

5 watts 10 watts

19"W x 7"D x 3 ½"H

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** Tru-VU Instruction Manual **

SECTION 2 -- PREPARATION FOR USE
2-1 Initial Inspection Check the shipping carton carefully for external damage. If the carton shows evidence of abuse, ask the carrier's agent to be present when the unit is unpacked. Carefully unpack the unit to avoid damaging the equipment through the use of careless procedures. Inspect all equipment for damage immediately after unpacking. Bent and broken parts, dents, and scratches should be noted. If damage is found, refer to paragraph 2-2 for recommended claim procedures. Keep all packing material for possible future use. 2-2 Claims If the unit has been damaged, notify the carrier immediately. File a claim with the carrier and advise Logitek of such action to arrange for repair or replacement without waiting for a claim to be settled with the carrier. 2-3 Repacking for Shipment If the unit must be returned to Logitek, attach a letter to it showing the owner's name and address. A description of the necessary service should be included in the letter. The original shipping carton and packaging materials should be used for reshipment if possible. Use FRAGILE labels on each surface. Return the unit freight prepaid. Be sure to insure the unit for its full value. The unit will be repaired promptly and returned freight prepaid. 2-4 Installation The Tru-VU models are designed to be mounted in a standard 19" equipment rack by using the four mounting holes in the corners of the front panel. Plastic washers should be used to keep the mounting screws from marring the front panel finish. While flow-through ventilation is not necessary, the units should not be mounted directly above equipment which produces significant heat, such as equipment using vacuum tubes. The unit should never be operated if the ambient temperature is above 55 degrees C (131 degrees F). 2-5 Connecting Mains Power Connect the meter to the power mains with the enclosed power cord. The unit is factory set for 115VAC operation but 230VAC operation can be selected via a slide switch located next to the power transformer inside the unit. To gain access to the voltage select switch, remove the enclosure top cover. The switch is located adjacent to the large power transformer. The mains connector is an IEC standard power entry module and may be used with any IEC type power cord of 15 amps or less. Sw1 Up Up Dn Dn Sw2 Up Dn Up Dn Ohms 2200 110 75 44 Use Loop-through mode Balanced twisted pair (XLR) Unbalanced coax (RCA & BNC) do NOT use this setting 2-6 Connecting Digital Input Models The Tru-VU accepts AES/EBU or S/PDIF serial data at sample rates of 30,000 to 50,000 samples per second via a female XLR connector on the rear panel. The input is also wired directly to the male XLR connector on the back panel for use in loop-through mode. The loop-through connector provides a convenient way to daisy-chain several pieces of equipment off of one digital output. Loop-through works well with AES/EBU signals but should be limited to 10 feet with S/PDIF signals and cables. S/PDIF signals using RCA type plugs may be connected to the input using an RCA to XLR adapter. Coax cables using BNC connectors can be connected to the input using a BNC to XLR adapter. Both of these are available from Logitek. AES/EBU Connection Pin 1: Shield Pin 2: Signal + Pin 3: Signal Pin-1 and the shell of each XLR is attached directly to the chassis at the connector. These shielding components do not share a ground path with any of the internal circuitry. One-end-only shield connections are NOT recommended when using digital input models. It is also important to set the two input load switches located between the two XLR connectors. Input Load Switch Settings

The Tru-VU is set so that -4 dBFS will light the top bargraph LED (+16 dB).

** Tru-VU Instruction Manual **

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2-7 Connecting Analog Input Models The Tru-VU accepts balanced or unbalanced inputs via rear panel XLR connectors on analog input only models or 3-circuit 1/4" phone plugs on dual input models. The connectors are wired as follows: Balanced Connection Pin 1 Pin 2 Pin 3 Unbalanced Connection Pin 1 Pin 2 Pin 3 Shield Center Hot Connect to pin 1 Shield Signal + Signal -

The Tru-VU shield pins are bonded directly to the chassis at the connector and do not share any ground paths with the internal circuitry. This allows cable shields to be connected at both ends without causing hum problems. The zero reference level for each input can be set anywhere between -10 dBu and +20 dBu by adjusting the multiturn gain control located adjacent to each input connector. A small flat blade screwdriver is needed to adjust the gain.

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** Tru-VU Instruction Manual **

SECTION 3 -- OPERATING INSTRUCTIONS
3-1 Bargraph Description The Tru-VU meter display contains two or four multi-LED bargraph displays. The 25 segments are arranged in four color groups. The -35 to -1 dB segments are green, the 0 dB segment is yellow, the +1 to +3 segments are orange and the +6 to +16 dB segments are red. Average (VU) levels are shown as a solid bar while peak (PPM) levels are shown as a single dot. 3-2 Display Ballistics In the PPM mode, the display has essentially 0 attack time and a 2.8 second per 24 dB release time. In average mode, the display has an attack and release time of approximately 300 milliseconds per 20 dB. These ballistics conform the international standards with the exception that the Tru-VU peak attack time is slightly faster. 3-3 User Maintenance The chassis and display windows of the unit may be cleaned using a mild detergent or isopropyl alcohol and a soft cloth. Do NOT use abrasive cleaners or aromatic solvents to clean the Tru-VU meter units.

* * * * * * * * * * WARNING * * * * * * * * *
The inside of the Tru-VU contains no controls or user serviceable parts. The cover should only be removed by competent technical personnel capable of servicing this type of equipment. Hazardous voltages exist on the underside of some circuit cards.

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Logitek will be happy to provide further information for servicing the unit. Please contact the factory or your Logitek dealer for further information. 3-4 Resetting the Program The Tru-VU contains software that executes on a programmable DSP integrated circuit. If the processor memory becomes corrupted, the meter may function incorrectly or fail to operate altogether. In most cases, an independent watchdog circuit will notice that the meter is working incorrectly and restart the system. The processor can be reset manually by turning the power off for fifteen seconds and then back on again.

** Tru-VU Instruction Manual **

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SECTION 4 -- SERVICING
4-1 General Information The Tru-VU is designed to need a minimum of maintenance for long trouble-free operation. Should repair be necessary, the technician should first read the information in the manual concerning the circuits in question and should follow proper procedures for testing and replacing semiconductors. Logitek engineers are readily available at the factory to provide technical assistance both during and after the warranty period.

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4-4 Access to Circuit Cards The internal components of the meter are accessed by removing the eight screws that attach the top cover and removing the cover. 4-5 DSP Control Card Filtered +9 VDC from power connector P3 is fed to the +5 VDC regulator IC5 via connector P4. +9 VDC as well as -9 VDC from P3 is also passed to the input cards via connectors P1 and P2. The +5 VDC output of IC5 is clamped against over voltage and voltage reversal by zener diode D1. Distributed power is filtered by C1, C2, C3, C4 and C5. In addition to powering all circuits on this card, IC5 also supplies +5 VDC to the input and display cards via connectors P1, P2, P5 and P6. On power up, the DSP is kept in reset by IC1 until the power has stabilized, ensuring a good power on reset. IC1 also contains a watchdog timer that will reset the DSP if its ST pin in not taken low at least once every 150 mSec. This pin is normally pulsed low every 5 mSec by a DSP write to address 0. The DSP (IC4) is clocked by a 12.288 MHZ crystal oscillator consisting of Y1,C6,C7 and an IC4 internal driver. IC4, pin43 is a buffered output of the oscillator and is used as the master clock for the analog to digital converters on the analog input cards. The first thing the DSP (IC4) does after reset is copy its program from EEPROM IC3 to its internal memory. Note that the 8-bit data bus from the EEPROM is connected to the middle byte of the DSP's 24-bit data port. Address decoder IC2 is used to reset the watchdog timer IC1 and supply the serial bit clock and load signals to the LED drivers on the display cards. The front panel PPM/VU slide switches are connected directly to the low byte of the DSP address port. Serial data is sent synchronously (data,clock,load) to the LED driver chips via display connectors P5 and P6 in 16-bit strings. Data is placed on the top bit of the DSP data port and clocked into the display drivers via a write to address decoder IC2. Other writes to IC2 will load the 16-bit strings into the left or right side display driver. Two channel audio data is fed synchronously (data,clock,frame sync) to serial ports on the DSP via input connectors P1 and P2. If the control card is only driving one display then the DSP IC4 will only have one serial port which will be connected to P1. In this case only left side connectors P1 and P6 will be active.

* * * * * * * * * * WARNING * * * * * * * * *
The inside of the Tru-VU contains no controls or user serviceable parts. The cover should only be removed by competent technical personnel capable of servicing this type of equipment. Hazardous voltages exist on the underside of some circuit cards.

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4-2 Fuse The primary winding of the power transformer is fused with a 12 amp slow-blow 20mm fuse housed in a fuse holder in a slide-out drawer under the power cord on the rear panel of the unit. It should only be replaced with fuses of the same type and current rating. The power cord must be unplugged from the rear panel to gain access to the fuse holder.

* * * * * * * * * * WARNING * * * * * * * * * *
Do NOT replace the fuse without first disconnecting the meter's power cord from the wall socket, as dangerous voltages are present which may cause electrical shock. Always use fuses of the same value and type as specified in this manual. Do NOT use fuses of a higher value than those specified, as a shock hazard and a fire hazard may result.

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A blown fuse is most often, although not always, a symptom of another failure. Related circuitry should always be carefully examined after any fuse failure, especially if a replacement fuse also blows. 4-3 Handling of CMOS Integrated Circuits All logic components in the Tru-VU meter are CMOS type integrated circuits. Even though all circuits have built-in static discharge protection, special care must be taken in the handling of these devices, particularly in dry environments.

* * * * * * * IMPORTANT NOTE * * * * * * * *
Do NOT remove or handle CMOS integrated circuits except in a grounded environment which is free of the risk of static electricity. Store such circuits on conductive foam or in anti-static containers. Do NOT store on styrofoam or other plastic sheets. Improper handling may damage these devices.

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** Tru-VU Instruction Manual **

4-6 Analog Input Card The audio from the left input XLR connector J1 is connected to a RF lowpass filter formed by R1, R2, C1 and C2. The resistors also form a -9 dB pad with the input impedance of balanced receiver IC1. IC1 provides an additional -6 dB pad between its input and output. These pads allow +20 dBu input signals to be handled by the +/- 5 volt supply rails. Signal gain is adjusted via trimpot R7 which is the feedback resistor around gain stage IC3a. Signal from IC3a is fed through anti-alias filter R9, C5 and DC isolated by C8 before connecting to the left input of the sigma delta analog to digital converter. Right channel connects to the converter via similar circuitry. The 12.288 MHZ master clock input to the ADC is generated by a crystal oscillator located on the DSP control card. Combined left and right audio data is sent synchronously (data, clock, frame sync) to the DSP in 64-bit strings via connector P3. IC5 and IC6 supply low noise regulated +/- 5 VDC to the analog portions of the circuit. The digital part of the data converter gets its +5 VDC from the DSP control card. 4-7 Digital Input Card Serial digital audio in the AES/EBU or S/PDIF format enters the card via XLR connector J1 and is directly connected to the output connector P2. Note that no buffering is applied to the loop through output. The input data signal is connected to pulse transformer T1 via DC blocking capacitor C2. The output of T1 is loaded with R1, R2 or R3, depending on the load required, and connected to data receiver IC1. C1 and R4 from a loop filter used by IC1 to recover the embedded clock from the coded input signal. IC1 separates the audio data, channel data and clock from the input signal. The audio is sent to the DSP in 64-bit strings via connector P3. IC2 creates a low noise +5VDC for use by the analog front end of IC1. The voltage is stabilized by C6 & C3 and is clamped against over or reverse voltage by D1. 4-8 LED Display Card Regulated +5 VDC from JP1 is stabilized by C1, C2 and connected to LED display driver U1. U1 controls the 50 display LEDs by scanning them in a eight by eight matrix. Segment lines are current controlled and connected to the LED anodes. Digit lines connect to the LED cathodes. Scanning is accomplished by taking each digit line low one at a time and sourcing current from the segment lines for whichever of the 8 LEDs in a digit group need to be lit. The display driver accepts synchronous serial data (clock, data, load) from the DSP on the control card in 16 bit strings composed of an address byte and a data byte. About once a second the DSP sends a complete

set of setup codes for the display driver. If the display card is plugged in while the meter is running, it will remain blank for a moment until these codes are received. 4-9 Power Supply Each Tru-VU contains a ground isolated and filtered step-down power supply to create the necessary operating voltages. This supply is located on a PCB on the right side of the meter enclosure. Mains AC from the power entry module J2 is fed through fuse F1, located in a drawer under the power cord in J2, to J1 on supply card LG-253. J1 feeds voltage selection switch S1 which connects the dual primaries of transformer T1 in series for 230 VAC operation or parallel for 115VAC operation. The dual secondaries of T1 are wired in parallel and loaded with a full-wave bridge rectifier RT1. The DC output of RT1 is filtered by capacitors C1 and C2 and fed to the red and green output pads. The voltage should be between 8 to 10 VDC with less than .5 volt of ripple. Analog input models will also have a charge pump consisting of IC1 and C3 that feeds filter C4 and the black output pads. The voltage should be -8 to -10 VDC with less than .2 volt of ripple. Jumpers soldered to the output pads feed power to one or two DSP control cards.

* * * * * * * * * * WARNING * * * * * * * * *
Dangerous voltages from the AC mains are present on the bottom of the power supply card. Always disconnect the AC power cord when servicing this circuit board. Always completely reinstall this board before reconnecting the power cord.

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** Tru-VU Instruction Manual **

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SECTION 5 -- REPLACEMENT PARTS LIST
All replacement parts are stocked in depth at the Logitek factory. Most are also available through local electronic parts distributors. For your convenience in purchasing replacement parts locally, we include the following parts list. All Logitek part numbers consist of a two-letter manufacturer code followed by that manufacturer's standard part number for the item. A list of manufacturers, arranged alphabetically by manufacturer code, follows this parts list in Section 7. All resistors are 1/4 watt, +/- 5% tolerance unless otherwise noted.

SYMBOL 5-1 DSP Control Card C1,2 C3-5 C6 C7 D1 P1,2 P3 P4 P5,6 4 pcs. 1 pc. 1 pc. Y1 IC1 IC2 IC3 IC4 IC5 1 pc. 1 pc. 1 pc. 1 pc. R1 R2 1 pc. 5-2 Analog Input Card

DESCRIPTION Capacitors 10uf/25V tantalum .1uf/50V SMD ceramic 25pf/1000V ceramic 15pf/1000V ceramic Diodes 5.6V zener 1 watt Connectors 10-pin dual row header 3-pin large header - locking 3-pin header 10-pin dual row header 10-pin dual row socket 3-pin large socket 3-pin socket (on regulator) Crystals 12.288 MHZ Integrated Circuits uP monitor 3 to 8 decoder EEPROM 8k x 8 150ns DSP 16-bit (drives 2 displays) DSP 16-bit (drives 1 display) +5 VDC regulator 8-pin dip socket 16-pin dip socket 32-pin PLCC 68-pin PLCC Resistors 10K 12K 2% 5 position bussed Circuit card

LOGITEK PART NUMBER

AV-TAP106K025HSB NC-NMC1206Z5U104M50T CE-DD-250 CE-DD-150 MO-1N4734A PN-051-010-153 PN-MLSS156-3A PN-MFSS100-3A PN-051-010-153 PN-050-010-455 PN-CE156F20-3A PN-CE100F28-3A CT-MP122 MM-MAX1232CPA MO-SN74HC138N CA-CAT28C64BN-15 AD-ADSP-2115-KP40 AD-ADSP-2105-KP40 MO-MC7805CT EM-100-083-10-1003 EM-100-163-10-1003 EM-150-032-11-02 EM-150-068-11-02

CT-770-61-R123 LG-275 Bright-VU Control

C1-4 C5,6 C7-12 C13-15 C16-19 C20-23 C24-26

Capacitors 75pf/1000V ceramic 2200pf/50V NPO SMD ceramic 1uf/35V tantalum .1uf/50V SMD ceramic 470pf/ SMD 4.7uf/25V tantalum .01uf/ SMD

CE-DD-750 NC-NMC1206NPO222K50TR AV-TAP105K035HSB NC-NMC1206Z5U104M50T AV-12061A471JATMA AV-TAP475K025CCS AV-12065E103MATMA

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** Tru-VU Instruction Manual **

SYMBOL D1,2 J1,2 P3 J3 IC1,2 IC3 IC4 IC5 IC6 3 pc. R1-4 R5,6 R7,8 R9,10 1 pc. 5-3 C1 C2-4 C5,6 C7 D1 J1 J2 P3 J3 IC1 IC2 R1 R2 R3 R4 SW1,2 T1 1 pc. Digital Input Card

DESCRIPTION Diodes 5.6V zener 1 watt Connectors Female XLR pc 10-pin dual row header 10-pin dual row socket Integrated Circuits Balanced line receiver Quiet op amp ADC 16-bit stereo -5 VDC regulator 100ma +5 VDC regulator 100ma 8-pin dip socket Resistors 21K, .1% 4220, 1% 50K multi-turn trim 300 Circuit card

LOGITEK PART NUMBER MO-1N4734A NT-NC3FK-H PN-051-010-153 PN-050-010-455 AD-SSM2143P AD-OP275GP AD-AD1877JR MO-MC79L05ACP MO-MC78L05ACP EM-100-083-10-1003 DL-RNC55H2102BS MP-CT9X503 LG-271C Bright-VU Analog Input

Capacitors .047uf/50V .1uf/50V SMD ceramic 4.7uf/25V tantalum 1uf/35V tantalum Diodes 5.6V zener 1 watt Connectors Female XLR pc Male XLR pc 10-pin dual row header 10-pin dual row socket Integrated Circuits AES/EBU receiver +5 VDC regulator 100ma Resistors 2200 110 75 1000 Switches 2 position SPST dip lever Transformers AES/EBU Circuit card

CE-CW-20C473K NC-NMC1206Z5U104M50T AV-TAP475K025CCS AV-TAP105K035HSB MO-1N4734A NT-NC3FK-H NT-NC3MK-H PN-051-010-153 PN-050-010-455 CS-CS8412-CS MO-MC78L05ACP

CT-194-2MST SS-67129600 LG-272A Bright-VU Digital Input

** Tru-VU Instruction Manual **

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SYMBOL

DESCRIPTION

LOGITEK PART NUMBER

5-4 LED Display Card (Master) Master Card Capacitors C1 .1uf/50V SMD ceramic C2 220uf/10V SMD tantalum P1,2 J1,2 D1-12 D13 D14-16 D17-25 U1 R1 R2 1 pc. Slave Card P2 J2 D1-12 D13 D14-16 D17-25 1 pc. 5-6 C1 C2 C3,4 RT1 F1 IC1 1 pc. P1 J1 J2 SW1 T1 1 pc. 1 pc. Power Supply Capacitors 6800uf/35V electrolytic .1uf/50V ceramic 100uf/25V electrolytic Rectifiers 6A pc mount / 240V Fuses 1 2 amp slow blow 20mm Integrated Circuits Charge pump 8-pin dip socket Connectors 3-pin large header - locking 3-pin large socket Power entry module/fuse holder Switches Slide DPDT Transformers 10V 2.4A International Circuit card Power cord (North America) Connectors 10-pin dual row header 10-pin dual row socket Diodes Green LED Yellow LED Orange LED Red LED Integrated Circuits 64 LED driver Resistors 1500 1, 1W Circuit card Connectors 10-pin dual row header 10-pin dual row socket Diodes Green LED Yellow LED Orange LED Red LED Circuit card

NC-NMC1206Z5U104M50T AV-TPSE227K010R0100 PN-051-010-153 PN-050-010-455 SY-BG5351K LO-LTL-433Y LO-LTL-433HR HP-HLMP-S401 MM-MAX7219CWG

LG-310A ROC-10 Master Meter PN-051-010-153 PN-050-010-455 SY-BG5351K LO-LTL-433Y LO-LTL-433HR HP-HLMP-S401 LG-311A ROC-10 Slave Meter

IL-688LBA035M2CD CE-UK50-104 NI-UFS1E101MPJ GI-GBPC-602 LF-218.500 LT-LT1054CN EM-100-083-10-1003 PN-MLSS156-3A PN-CE156F20-3A SR-6200.4115 CK-L202-121MS02QE SI-IF-24-16 LG-253C VU Supply BE-17251

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** Tru-VU Instruction Manual **

SECTION 6 -- MANUFACTURERS LIST
CODE AD AV BE CA CE CK CS CT DL EM GI HP IL LF LG LO LT MM MO MP NC NI NT PN QT SI SR SS SY MANUFACTURER Analog Devices Inc. AVX/Stantel Corp. Belden Catalyst Semiconductor Centralab Electronics Div. C&K Components Crystal Semiconductor CTS Dale Ecam Technology General Instruments/Quality Technologies Hewlett Packard Opto-electronics Div. Illinois Capacitor Littlefuse Logitek (Circuit cards) Lite-On Inc. Linear Technologies Maxim Integrated Products Motorola Semiconductor Products Mepco/Electra Inc. NIC Components Nichicon Corporation Neutrik Panduit Corp. Quality Technologies Signal Transformers Co. Schurter Inc. Schott Corp. II Stanely Co., Inc. LOCATION Norwood, MA Myrtle Beach, SC Richmond, IN Santa Clara, CA Milwaukee, WI Newton, MA Austin, TX Elkhart, IN Tempe, AZ Scottsdale, AZ Sunnyvale, CA Santa Clara, CA Lincolnwood, IL Des Plaines, IL Houston, TX Milpitas, CA Milpitas, CA Sunnyvale, CA Phoenix, AZ San Diego, CA Amityville, NY Schaumburg, IL Lakewood, NJ Tinsley Park, IL Sunnyvale, CA Inwood, NY Petaluma, CA Minneapolis, MN Los Angeles, CA

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SECTION 7 -- DIAGRAMS

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Logitek
TWO YEAR LIMITED WARRANTY
Logitek Electronic Systems, Inc. warrants its professional equipment (excluding Logitek Software, which is covered by a separate warranty) against defects in materials and workmanship for two years pursuant to the following terms and conditions. The warranty extends to the original purchaser only. LOGITEK will repair or replace, at its option, at its factory without charge professional equipment if a defect in materials or workmanship develops during the first two years following purchase, when the equipment is returned to the factory or LOGITEK authorized service centers freight prepaid with a description of the nature of the failure. No reimbursements can be made for repair charges that are not factory authorized. After repair or replacement, LOGITEK will return the equipment to the purchaser freight prepaid. In the event that any part of this professional equipment becomes defective during the first two years following purchase, and purchaser wishes to attempt repair, purchaser may obtain a replacement part by notifying LOGITEK of the part of the equipment which has failed. LOGITEK will thereafter ship a replacement part, freight prepaid. LOGITEK may require the purchaser to return the defective part to LOGITEK freight prepaid as a condition of such replacement, either before or after LOGITEK ships the replacement part. LOGITEK shall not be responsible for any other c h a r g e s o r l i a b i l i t i e s a s s o c i a t e d w i t h p u rchaser--made repairs. No part or equipment shall be considered defective if it fails to operate due to exposure to extreme temperatures or excessive moisture in the atmosphere. Light bulbs, batteries, potentiometers or other equipment not manufactured by Seller shall carry only the warranty, if any, of the original equipment manufacturer in effect at the time of shipment of this order; and Seller's obligation under this warranty shall be limited to such adjustment as Seller may obtain from the original manufacturer. This limited warranty is void if equipment is modified or repaired without authorization; subjected to misuse, abuse, accident, water damage or other neglect; or has had its serial number defaced or removed. No obligation is assumed by LOGITEK to update previously manufactured equipment. Specifications are subject to change without notice. EXCEPT AS SPECIFICALLY PROVIDED HEREIN, LOGITEK MAKES NO WARRANTY, REPRESENTATION, PROMISE, OR GUARANTEE, EITHER EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE, WITH RESPECT TO THE EQUIPMENT, USER DOCUMENTATION OR RELATED TECHNICAL SUPPORT, INCLUDING THEIR QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL LOGITEK BE LIABLE FOR INDIRECT, SPECIAL, INCIDENTAL, TORT, ECONOMIC, COVER, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF OR INABILITY TO USE LOGITEK PRODUCTS, EQUIPMENT, OR SERVICES, INCLUDING, WITHOUT LIMITATION, DAMAGES OR COSTS RELATING TO THE LOSS OF PROFITS, BUSINESS, GOODWILL, DATA OR COMPUTER PROGRAMS, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO CASE SHALL LOGITEK `S LIABILITY FOR MONEY DAMAGES EXCEED THE AMOUNT PAID BY YOU FOR THE LOGITEK EQUIPMENT OUT OF WHICH SUCH CLAIM AROSE. THE FOREGOING LIMITATIONS SHALL NOT APPLY TO CLAIMS RELATING TO DEATH OR PERSONAL INJURY WHICH ARISE OUT OF PRODUCTS DEEMED TO BE CONSUMER GOODS UNDER APPLICABLE LAW. Some states or provinces do not allow the exclusion or limitation of implied warranties or limitation of liability for incidental or consequential damages, so the above exclusion or limitation may not apply to you. The warranty and remedies set forth herein are exclusive and in lieu of all others, oral or written, express or implied. No Logitek dealer, distributor, agent, or employee is authorized to make any modification or addition to this warranty.

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