BB100 Broadcast Mixer TECHNICAL MANUAL A Harman International Company
Serial No: IMPORTANT For convenience, write your serial number in the box above and keep this manual in a safe place. The number can be found on the rear of the product. This number MUST be quoted in all communications in order to obtain technical support and spare parts from either the factory or your dealer.
© Harman International Industries Ltd. 1998 All rights reserved. Parts of the design of this product may be protected by worldwide patents. AMEK is a trading division of Harman International Industries Ltd. Information contained in this manual is subject to change without notice and does not represent a commitment on the part of the vendor.
Contents © AMEK Issue 3 1 Introduction 2 Installation 3 Power Supplies & Cabling 4 Connectors 5 Modules 6 System Architecture 7 Maintenance 8 Specification 9 Schematics Introduction 1-3
1-4 Introduction Issue 3 © AMEK
© AMEK Issue 3 Introduction 1-5
1-6 Introduction Issue 3 © AMEK
Precautions and Safety Instructions Caution For your own safety and to avoid invalidation of warranty, all text marked with these Warning Symbols should be read carefully! Please keep this information! Important information. Read this before proceeding. Hazard or unsafe practice which can result in severe personal injury or death.
Note de Précaution et Sécurité Précaution Pour votre sécurité et afin de ne pas interrompre la garantie il est important de lire attentivement les paragraphes marqués d'un symbole! Conserver ce document! Importante information. Priere de lire avant utilisation. Hazadeuse ou dangereuse manipulations peuvent provoquées de graves blessures ou même la mort. Note de précaution.
Warranty 1. Amek is a trading division of Harman International Industries Ltd. End User means the person who first puts the equipment into regular operation. Dealer means the person other than Amek (if any) from whom the End User purchased the equipment, provided such a person is authorised for this purpose by Amek or it’s accredited Distributor. Equipment means the equipment supplied with this manual. 2.
Introduction BB100 Hardware The BB100 Series is a range of compact, high quality audio consoles designed for broadcast professionals. Although it has been designed primarily for broadcast use, the BB100 will find numerous applications in other areas where a cost-effective and flexible audio mixer is required that does not compromise build quality or performance in the least. The console is available in 4 frame sizes and can be supplied as drop through or desktop style chassis.
© AMEK Issue 3 Installation 2-1
Contents Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 EMC Precautions . . . . . . . . . . . . . . . . . . . . . . . . 2-7 BB100 Chassis Dimensions . . . . . . . . . . . . . . . . . . .
Installation Before disposing of the packaging, check that all expected items are present and correct. Refer to the enclosed packing list! Power Supplies Three different types of power supply unit may be used with BB100 consoles. The type supplied depends on the console size and the date it was built. The PSU 300 and the MPS 20 are switch mode supplies whilst the MPS 5 is a linear supply. Note: - Always use the Power Supply which is supplied with the Console.
Checking and connecting the power units BEFORE connecting any power units to the chassis, follow the procedure below: WARNING: THIS APPARATUS MUST BE EARTHED. Use the terminal provided on the rear of the chassis if necessary and connect it to the technical ground for the installation. DO NOT disconnect the safety earth from the AC mains cords. q Make sure the AC operating voltage settings are correct for the local mains supply. (Refer to the power supply section of this manual if necessary).
Earthing The most reliable earthing system is to have only one point to which all equipment is earthed. It is essential for safety that all mains powered equipment in the system has a mains (safety) earth connected. This is especially important on computers with an internal power supply. Connecting a non earthed computer to the console can cause serious damage. Clean Earth The console has an external M4 stud, for a clean or ‘technical’ earth to be connected.
Signal Levels The BB100 has been designed to operate with a wide range of studio equipment. All input and output levels are therefore suitable to match +4dBu systems and the meters are calibrated to read “0” for output levels of +4dBu. The meter trim controls can allow the meters to be adjusted to read “0” for output levels of +6dBu. Refer to Chapter 8 (Specifications) for details of input / output levels. Module Removal Never remove or insert modules or any system parts when the power are switched ON.
EMC Precautions Introduction EMC (electromagnetic Compatibility) is the ability of equipment to function correctly in locations where electromagnetic interference is present. Examples of electromagnetic interference are Radiated Interference e.g. from local broadcast transmitters, mobile phones Conducted interference. This can be introduced into console signal, mains, or dc power cables when they are located close to cables for electrical plant which contain “spikes” Electrostatic discharge. e.g.
Do-it-yourself testing You can do a simple check of the local electromagnetic environment using a radio or television, or, better, an all-wave ham radio or scanner. Antennas and receivers for wireless microphones The antenna of the receiver for a wireless microphone is very sensitive to rf. Because the frequency bands allocated to wireless microphones differ greatly among CENELEC countries, it is not possible just to specify very low emission limits over a particular frequency range.
Connecting unbalanced equipment Equipment with unbalanced audio ports should be avoided or used with one of the many “unbalanced-to-balanced” interface boxes" available. If it is unavoidable to use unbalanced equipment, it must be wired in twin-screened cable. In this case, unbalanced inputs are worse than unbalanced outputs. EMC precautions during Maintenance Mixer panelling To maintain good immunity to an electrostatic discharge or rf field, metal panels should be kept on the console at all times.
BB100 Chassis Dimensions BB100 Chassis Dimensions 14 Position Frame - 483mm 22 Position Frame - 726mm 30 Position Frame - 969mm 38 Position Frame - 1212mm 6mm PUSH PUSH PUSH PUSH PUSH PUSH PUSH PUSH 14 Position Frame - 431mm 22 Position Frame - 674mm 30 Position Frame - 917mm 38 Position Frame - 1160mm 594mm 127mm 166mm 249mm 536mm 2-10 Installation Issue 3 © AMEK
© AMEK Issue 3 Power Supplies & Cabling 3-1
Contents Power Supplies & Cabling . . . . . . . . . . . . . . . . . . . 3-3 Mains Lead Connections. . . . . . . . . . . . . . . . . . . . . 3-3 Supply types & Description . . . . . . . . . . . . . . . . . . . 3-4 Technical Specifications . . . . . . . . . . . . . . . . . . . . . 3-7 Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . 3-9 Output Voltage Adjustments - PSU 300 . . . . . . . . . . . . . 3-10 Output Voltage Adjustments - MPS 5 . . . . . . . . . . . . . .
Power Supplies & Cabling WARNING: THIS APPARATUS MUST BE EARTHED. WARNING: It is important that a console is never left connected to a defective PSU. This may cause serious damage to the console. WARNING: The power cord must be disconnected before removing cover plates. The power supply MUST be earthed. Under no circumstances should the mains earth be disconnected from the power supply unit. Lethal voltages are present on the printed circuit boards. Do not operate the unit with the top cover removed.
Supply types & Description Three different types of power supply unit may be used with BB100 consoles. The type supplied depends on the console size and date it was built. The PSU 300 and the MPS 20 are switch mode supplies whilst the MPS 5 is a linear supply. There are no user serviceable parts in the units. In the event of failure for any reason, the switched mode module should be replaced with a spare and the faulty module returned to AMEK for repair or replacement subject to current warranty conditions.
Replacing Mains Fuse – PSU 300 / MPS 5 WARNING: To avoid risk of fire use the correct value fuse as indicated on the units. Switch the ON/OFF switch to the OFF position. Remove the mains lead from the connector. Use a small screwdriver to prise the fuse carrier from its location in the connector. Check the fuse and replace if necessary. In the event of repeated failure of the mains fuse consult the AMEK dealer from where the unit was purchased.
Clean Earth The console has an external M4 stud, for a clean or ‘technical’ earth to be connected. This stud is located on the rear panel of the console. The incoming technical earth should be connected to this star point; the incoming cable should be terminated in an M4 eyelet. In the best installations, a clean earth is provided from a specially constructed earth rod system.
Technical Specifications Mains Input Voltage Range PSU 300 90v – 254V AC @ 47 – 63 Hz MPS 5 85/100/115/230V AC @ 50 – 60 Hz MPS 20 90v – 254V AC @ 47 – 63 Hz Rated Input Power PSU 300 380 watts MPS 5 450 watts MPS 20 700 watts Mains Fuse Rating PSU 300 Use T8A/250V (slow-blow) for 90 - 132V Use T8A/250V (slow-blow) for 180 - 254V MPS 5 Use T3.15A/250V (slow-blow) for 230V Use T6.3A/250V (slow-blow) for 85/100/115V MPS 20 N/A No External Fuse Fitted Output Capacity PSU 300 ±17.5v @6.
Overall Dimensions PSU 300 MPS 5 MPS 20 Height. (exc. Feet) 133.50mm (3U) Width 482.60mm Depth. (exc. Connectors) 103.50mm Height. (exc. Feet) 88.10mm (2U) Width 482.60mm Depth. (exc. Connectors) 350.50mm Height. (exc. Feet) 133.50mm (3U) Width 482.60mm Depth. (exc. Connectors) 400.00mm Weight (Exc. Packing) PSU 300 5Kg MPS 5 11Kg MPS 20 15Kg Note: All Voltage and Current measurements are taken at the console end of the power supply cable.
Connector Pinouts Pin Voltage PSU 300 Pin 1 0v Pin 2 +17.5V DC Pin 3 -17.5V DC Pin 4 48V DC MPS 5 Pin A AGND (0V) Pin B AGND (0V) Pin C +17.5V DC Pin D -17.5V DC Pin E +5V DC Pin F +48V DC Pin G DGND Pin H Chassis GND MPS 20 © AMEK Issue 3 A +48V DC B 0v (±17V & 48V DC) AGND C 0v (±17V & 48V DC) AGND D +17.5V DC E +17.5V DC F -17.5V DC G -17.
Output Voltage Adjustments The voltage adjustment presets are adjusted during manufacture and should not need resetting unless major repairs have be done to the units. The adjustment trimmers for each PSU are shown in the following diagrams. Any adjustment should be checked with the unit on load. Note: Only an insulated trimmer tool should be used before making any adjustment. Note: There are no user trimmable controls on the PSU 300 except for a for a voltage adjustment on the 5v output.
Output Voltage Adjustments - MPS 5 © AMEK Issue 3 Power Supplies & Cabling 3-11
Output Voltage Adjustments - MPS 20 Mains Switch LED Control Card +17v ADJ +5v ADJ -15v ADJ +15v ADJ -17v ADJ +15v 0v (±15v) -15v +17v 0v (±17v / 48v) -17v +5v 0v (+5v) +48 48v Card +Sense (+5v) Mains Filter -Sense (+5v) Filter Card Output Connector Mains Input 90 - 254v AC @ 47 - 63Hz 700 WATTS 3-12 Fan MPS20 Overlay Diagram Power Supplies & Cabling Issue 3 © AMEK
© AMEK Issue 3 Connectors 4-1
Contents Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Back Panel Layout 4 Group . . . . . . . . . . . . . . . . . . . 4-4 Back Panel Layout 8 Group . . . . . . . . . . . . . . . . . . . 4-5 Fader Starts / Monitor Logic / Remote Mutes . . . . . . . . . . 4-6 56 Way I/O EDAC Connections . . . . . . . . . . . . . . . . . 4-7 Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . .
Connections All the main audio inputs and outputs are located on the back panel of the console. The Mic inputs are balanced and are via 3 pin female XLR connectors. Inputs and Outputs are electronically balanced excluding the send, which is Ground Compensated. The headphone output is located at the front of the console and is via a stereo ¼ inch jack socket.
4-4 Right O/P Connectors EARTH Post 56 Way I/O EDAC COMMS RET 2 Send 2 GRT 2 O/P 2 RET 3 Send 3 GRT 3 RET 4 Send 4 GRT 4 RET L Send L ST Ret L RET R Send R ST Ret R Power Input Connectors Mic PUSH Line Direct O/P Send Return Fader Starts Monitor Logic 25 Way Female D Type A R Line R Line O/P 1 B L Line L Line GRT 1 R Ret L Send L Ret R Send R Ret L Send L Ret Stereo Channels Group 1 R Send Send 1 RET 1 Aux 5 Aux 1 Group 2 Clean-Feed Aux 6 Aux 7 Aux 2
© AMEK Issue 3 Connectors RET 4 Send 4 GRP 4 RET 5 Send 5 GRP 5 RET 6 Send 6 GRP 6 RET 7 Send 7 GRP 7 RET 8 Send 8 GRP 8 Insert Insert GRP O/P EARTH Post Power Input Connectors GRT 4 GRT 5 GRT 6 GRT 7 GRT 8 GRP Ret Aux 4 L Send Aux 5 R Ret Aux 6 Clean 3 R Send Aux 7 Clean 4 ST Ret L Aux 8 Left O/P ST Ret R Aux Sends Right O/P 56 Way I/O EDAC COMMS SPK 1 R GRT 2 RET 2 Send 2 GRP 2 GRT 3 RET 3 Send 3 GRP 3 Aux 2 L Ret Aux 3 Clean 2 Mic PUSH Line Mic
Fader Starts / Monitor Logic / Remote Mutes Fader Start The Fader Start switch allows tape recorders or similar equipment to be remote started. The connection is designed for use with 5 volt (TTL/CMOS type) logic systems and is controlled by an active low. Internal module jumpers select whether or not the TALLY Led can be controlled internally or externally. The TALLY Led when set to external is controlled by applying an active low to a pin on the D Type connector located on the rear panel.
56 Way I/O EDAC Connections Input and Output Connections I/O connections are supplied via a 56 way EDAC located on the rear panel.
Power Supplies 4-8 Connectors Issue 3 © AMEK
© AMEK Issue 3 Modules 5-1
Contents LB1 The Mono Input Module. . . . . . . . . . . . . . . . . . 5-3 LBS The Stereo Input Module . . . . . . . . . . . . . . . . . 5-5 LB2 The Dual Group Module . . . . . . . . . . . . . . . . . 5-7 LB6 The Auxiliary Master Module . . . . . . . . . . . . . . . 5-9 LB4 The Stereo Master Module . . . . . . . . . . . . . . . . 5-10 Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11 BB100 Jumper and Switch Options . . . . . . . . . . . . . . . 5-12 14 Position Motherboard . . . . . . . .
LB1 Mono Input Module The LB1 Mono Input is provided with XLR and ¼ jack connectors, either of which may be used for any level of input signal. The channel is provided with Insert points using a Ground Compensated Send and a Balanced Return at a nominal level of +4dBu located on the rear panel. 1. The 48V switch applies 48v phantom power to the Mic Input XLR. Note: Under no circumstances press the 48v switch if an unbalanced source is connected to the XLR. 2.
Auxiliary Sends 9. Signal is sent to the Aux 1-8 buses via the eight LEVEL controls. All the Auxs have unity gain when the controls are fully clockwise and are switched pre or post in pairs by the PRE switches. 10. Auxs 1 & 2 has an internal switch option to configure the Aux to a Stereo level/pan arrangement. Routing 11. The Pan control feeds the signal to the Stereo mix and the groups. Panning left pans to the odd groups and Stereo left, panning right pans to the even groups and Stereo right.
LBS Stereo Input Module The LBS Stereo Input Module is provided with ¼ jack connectors on the rear panel. The channel is provided with Stereo insert points using Ground Compensated Sends and Balanced Returns at a nominal level of +4dBu located on the rear panel. The insert points have an internal option to move the points post pan. 1. The Mono Left switch applies the left hand signal to the left and right of the module. 2.
Auxiliary Sends Note: The pre and post signals are the sum of the left and right signals except Aux 1 & 2 which has an internal switch option to configure it to a Stereo level/pan arrangement i.e. Aux 1 will be fed by the left only and Aux 2 will be fed from the right only. 8. Signal is sent to the Aux 1-8 buses via the eight LEVEL controls. All the Auxs have unity gain when the controls are fully clockwise and are switched pre or post in pairs by the PRE switches. Routing 9.
LB2 Dual Group Module The Dual Group Module is provided with XLRs on a 4 group console and ¼ jacks on a 8 group console, insert send and returns. Clean feed outputs are provided on XLRs on an 8 group console and jacks on a 4 group console. 1. Signal is sent to Aux 1-4 buses via the four level controls. The Auxs have unity gain when the controls are fully clockwise. The source signal is fed from pre or post group faders. The pre or post switch operates on all four Auxs. 2.
16. The AFL switch provides a post fade signal to the monitor speakers replacing the selected source. 17. The ST Assign switch assigns the signal to the Stereo bus. 18. The Pan control feeds the signal to the Stereo bus and to the Stereo AFL bus. In the centre there is a drop of -3dB. 19. The Mute switch cuts off all output from the channel and utilises a soft mute for click free switching. 20. The AFL switch provides a post fade signal to the monitor speakers replacing the selected source. 21.
LB6 Auxiliary Master Module The Aux Master module is provided with jack connectors for the outputs Comms The Talkback system provides communication to the Groups and Aux outputs and speaker outputs. 1. The 3 pin XLR connector provides a balanced talkback input for a local microphone or gooseneck mic. The sensitivity of the mic input is variable between +10dBu and +70dBu. 2. The Talk switch can be momentary or latching depending on the length of time pressed.
LB4 Stereo Master Module 1. Signal is sent to the Aux 1-4 buses via the four Level/Pan controls. The upper four are sourced from the left Stereo bus and the lower four from the right Stereo bus. They are switched pre or post in groups of four by the PRE switches. Internal jumpers can configure the Aux controls as a level/level option. A further option allows the source signal to be derived from the monitor return inputs instead of the Stereo bus, via internal jumpers.
15. The Mute switch cuts off all output from the console to the Monitor speakers. 16. The Faders are the main level control for the Stereo Master. They have 10dB of gain at the top of travel. 17. The Mix Mute switch cuts off the output from the Stereo Bus. Metering Level indication is monitored by 28 segment LED bargraph meters and VU meters, which are located in the meterhood. The meters read Group Output, Stereo Mix or 2 Track Returns or the PFL/AFL bus.
BB100 Jumper and Switch Options 14 Position Motherboard - GL 1850 Jumpers P1 to P10 are the Cleanfeed options and will be set depending on the operation and configuration of the console. P1/ P5 Cleanfeed Position 5 To enable the module in position 5 to be the cleanfeed input link pins 1 – 2. This can only be applied to a Mono channel or the right input for a Stereo channel. Note: - P5 should be in the disabled position if a Mono channel is fitted.
P2 / P6 Cleanfeed Position 6 To enable the module in position 6 to be the cleanfeed input link pins 1 - 2. This can only be applied to a Mono channel or the right input for a Stereo channel. Note: - P6 should be in the disabled position if a Mono channel is fitted. If a Stereo channel is fitted Jumper P6 will be set as P2 and applies to the left input for the Stereo channel. P3 / P7 Cleanfeed Position 7 To enable the module in position 7 to be the cleanfeed input link pins 1 - 2.
P10 Cleanfeed position 10 If position 10 has a Group module fitted P10 must be in the disabled position. If a Stereo module is fitted and it is to be used as a Cleanfeed input P10 has to be enabled. To enable link pins 1 – 2. Jumpers P11 and P12 are the Virtual Earth Disable options and will be set depending on the operation and configuration of the console. P11 Virtual Earth Disable options Cleanfeed Jumpers. In an eight group console no jumpers are fitted.
LB1 Mono Input Module Jumper and Switch Options – GL1864 P1 Signalisation Select To enable the remote mute facility on the channel, link pins 4 – 6 (Factory Pre-set). Applying an active low to a pin on the 15 way D Type connector controls the remote mute. This is located on the back panel. To disable the remote mute and enable the optional VCA, link pins 2 – 4. To enable the external Tally indicator, link pins 3 – 5.
S31 PFL / AFL Select Switch. When the switch is out (Factory Pre-set), pre fade listen is sent to the Monitor outputs when any SOLO switch is pressed. When the switch is pressed in, stereo after fade listen is sent to the Monitor outputs when any SOLO switch is pressed. S32. Aux 1 & 2 Mono Stereo Switch. When the switch is out, Aux 1 & 2 acts as a level / level arrangement (Factory Pre-set). When the switch is pressed in, Aux 1 & 2 are converted to a level / pan arrangement.
LBS Stereo Input Module Jumper and Switch Options – GL1865 P1 Signalisation Select To enable the remote mute facility, link pins 4 – 6 (Factory Pre-set). Applying an active low to a pin on the 25 / 15 way D Type connector controls the remote mute. This is located on the back panel. (25 way for Group position, 15 way for Input position). To disable the remote mute and enable the optional VCA control link pins 2 – 4. To enable the external tally indicator, link pins 3 – 5.
S27 PFL / AFL Select Switch When the switch is out (Factory Pre-set), stereo pre fade listen is sent to the Monitor outputs when any SOLO switch is pressed. When the switch is pressed in, stereo after fade listen is sent to the Monitor outputs when any SOLO switch is pressed. S28 Aux 1 & 2 Mono Stereo Switch When the switch is out, Aux 1 & 2 is fed by a mono mix of left and right (Factory Pre-set).
LB2 Dual Group Module Jumper and Switch Options – JP 1866 P1 Cleanfeed Off Group Source To route the signal from the Aux Pre / Post switch and send it to the Cleanfeed output, link pins 3 – 5 and 4 – 6. E.g. If the module is Groups 1 & 2, Groups 1 & 2 will be sent to Cleanfeed 1. To disables the function, link pins 1 – 3 and 2 – 4 (Factory Pre-set). P2 Cleanfeed Jumper Linking pins 3 – 5 (Factory Pre-set) enables the chosen Cleanfeed bus to be connected to the Cleanfeed mix amp.
P5 Return Aux Send Bus Select To select Aux buses 1 & 2, link pins 4 – 6 and 3 – 5 (Factory Pre-set). To select Aux buses 3 & 4, link pins 1 – 3 and 2 – 4. P6 Group Bus Select These jumpers should be set for the appropriate Group buses. To select Groups 1 & 2, link pins 1 – 2 and 3 - 4. To select Groups 3 & 4, link pins 5 – 6 and 7 - 8. To select Groups 5 & 6, link pins 9 – 10 and 11 - 12. To select Groups 7 & 8, link pins 13 – 14 and 15 - 16. Note: - Only link one pair of buses per module.
LB4 Master Module Jumper and Switch Options – GL 1867 P1, P2, P8, and P9 Monitor Aux Send Mono / Stereo Select Stereo bus left and right has four sets of Aux sends. These can be configured as a stereo / level pan arrangement or mono level / level arrangement in pairs. P9 operates off the Stereo bus left for Aux 1 and 2. P8 operates off the Stereo bus left for Aux 3 and 4. P2 operates off the Stereo bus right for Aux 1 and 2. P1 operates off the Stereo bus right for Aux 3 and 4. To configure as Stereo.
P4 and P6 Monitor Return Bus Select The Monitor Return outputs can be configured to feed the Aux sends. To disable the Monitor Returns (Factory Pre-set), link pins 1 – 2 and 7 – 8 on both jumpers. To feed the Aux buses, link pins 3 – 4 and 9 – 10 on both jumpers. P6 configures the Monitor Returns 1 and 2. P4 configures the Monitor Returns 3 and 4.
P15 Remote Mute / VCA Control Select To enable the remote mute facility for the Control Room Monitors, link pins 3 - 4. (Factory Pre-set). Applying an active low to a pin on the 25 way D Type connector controls the remote mute. This is located on the back panel. To enable Stereo Bus to be cut externally, link pins 5 – 6. To enable Monitor 2 to be cut externally, link pins 1 – 2. Note:- If fitted with optional VCAs, link pins 7 – 8 to provide external control.
LB6 Aux Master Comms Module Jumper and Switch Options – GL 1868 P1 User Tally / On Air Select To select the internal User Tally indicator, link pins 1 – 3 (Factory Pre-set). To select the external User Tally, link pins 3 – 5. Applying an active low to a pin on the 25 way D Type connector controls the external User Tally. This is located on the back panel. To activate On Air Mode, link pins 4 – 6 (Factory Pre-set). To disable it, link pins 2 – 4.
© AMEK Issue 3 System Architecture 6-1
Contents BB100 Meterhood Layouts . . . . . . . . . . . . . . . . . . . 6-3 Power and Ribbon Harness Locations . . . . . . . . . . . . .
BB100 Meterhood Layouts © AMEK Issue 3 System Architecture 6-3
Power and Ribbon Harness Locations To gain access to the power and ribbon harnesses remove the underside panel. See the following diagrams for the location and function of the harnesses.
Motherboard Harness Locations © AMEK Issue 3 System Architecture 6-5
Power Distribution and Harness Location (1851) 6-6 System Architecture Issue 3 © AMEK
© AMEK Issue 3 Maintenance 7-1
Contents Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 Removing the Modules . . . . . . . . . . . . . . . . . . . . . 7-3 Audio and Level Alignment . . . . . . . . . . . . . . . . . . . 7-3 Moving Coil Meter Alignment . . . . . . . . . . . . . . . . . . 7-3 Oscillator Level . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 Clean-Feed Trim . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance There are no user serviceable parts in the console, all maintenance work should be carried out by AMEK or the authorised dealer. The unit should be cleaned with a soft brush around the controls. DO NOT use solvent cleaners under any circumstances. Removing the Modules Modules are taken out by removing the fixing screws at the top and bottom ends. The modules are removed by pulling them directly upward. Never remove or refit the modules with the power on.
Clean-Feed Trim The clean-feed null trim is used to optimise clean feed attenuation. (Factory Preset). The trim adjustment for the null is accessed through the top faceplate of the Dual Group module (LB2). The null trim is used to cancel the pre stereo bus signal with the chosen clean-feed input modules direct output. The result in cancellation appears on the clean-feed output. Power and Ribbon Harness Location To gain access to the power and ribbon harnesses remove the underside access panel.
© AMEK Issue 3 Specifications 8-1
Contents Technical Specification . . . . . . . . . . . . . . . . . . . . . 8-3 Console Types . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Specification Console Types All specifications for the BB100 console apply to consoles that are installed completely in accordance with Amek’s recommendations. This includes recommendations on power supply cables and grounding. The figures in this specification are typical figures measured on a console, immediately after completing normal production tests. Figures will therefore vary slightly from console to console and the results here should not be regarded as ‘guaranteed minimum performance’.
Headroom Mic input Measured at the channel insert point. Gain 10 dB. PAD in. >+25dBu Line input Measured at the channel insert point. Gain unity. >+25dBu Subgroup & Stereo Bus output Measured at the Stereo Bus output with 600 ohm load. Gain unity.
LBS Stereo Input Channel HF The HF control gives 18dB of cut or boost switchable at frequencies 6kHz or 12kHz. LF The LF control gives 18dB of cut or boost. The frequency switch selects between 40 Hz and 80Hz. Using the X3 switch multiplies the selected frequencies by three giving a selection of 120Hz or 240Hz. MF The MF cut and boost control gives a range of ± 14dB. The HMF frequency control gives a variable frequency range of 80Hz to 5kHz.
8-6 Specifications Issue 3 © AMEK
