Bel 8110 man for pdf - (NI Broadcast Ltd)
Contents
1. I I 5104100 5104100 51 51 lew Bel 8110 Rear v ALIALLISNIS m 0101 1911910 PS MEC 19 T3NNYH2 8 5315 35 0008 0118 139 Bel 8110 Front view Bel 8110 Block Diagram TAJLO Wand 3079 0118733 a ome 1 Jlvo ysam wau Hox 79d i M Dum L TAMEN Twn Mu H I 27 E ied 1 TS ME AUS Pe mam F Be I mcus Dik J SET UP INFORMATION SERVICE PRE SET RESISTORS equipment required oscilloscope and db RMS level meter There are eight pre set ten turn resistors and these are all located on the 8110 Filout PCB daughter board These set the output level of the four stereo L R outputs eight channels RV1 Sets output level of CH3 RIGHT monitor clipping at PL2 1 RV2 Sets output level of CH3 LEFT monitor clipping at PL2 2 Sets output level of CH4 RIGHT monitor clipping at PL2 5 RV4 Sets output level of CH4 LEFT monitor clipping at PL2 6 RV5 Sets output level of CH1 RIGHT monitor clipping at PL2 13 RV6 Sets output level of CH1 LEFT monitor clipping at PL2 14 RV7 Sets output level of CH2 RIGHT monitor clipping at PL2 9 RV8 Sets output l2. even and gentle pull upwards until the PCB is released from the mother board Sockets The PCB can now be lifted clear of the chassis 4 To refit the PCB accurately locate the plugs on the PCB daughter board with the sockets on the mother board making sure the pillars on the mother board locate in the holes on the PCB Gently push the plugs into the sockets keeping the board parallel to the mother board When the plastic pillars click in place the PCB is fitted correctly 5 Replace the cover plate
3. 4 GND 15 GND To UNBALANCE link GND and at the Male connector It is recommended that where possible all cables be good quality screened twisted pair multiway cables BELDEN or similar Optimum performance is obtained using individual screened pairs with a overall screen and separate ground returns Screened MALE 15 way connectors are essential EMC COMPLIANCE The Bel 8110 was designed and tested to comply with the EMC directive numbers EN55103 EN55022 EN55082 1 and EN60950 when used as directed CC Please ensure that wherever possible a 1U space is provided above and below the Bel 8110 to ensure that the unit is properly ventilated unless forced air cooling is employed in the rack SPECIFICATION Input Impedance 25K W Electronically balanced Output Impedance 50 W Electronically balanced Frequency Response 20 20kHz 1db Input Dynamic Range 120 db Signal To Noise Ratio 95 db Typical Distortion less than 015 1kHz 6dbm Nominal Input Level 6db 15db max Nominal Output Level 6db 15db max Conversion Accuracy 20 Bit Delta Sigma A D 24 Bit Delta Sigma D A Sampling Rate 48kHz Power Requirement 115 230VAC 50 60Hz Power Consumption 35W Dimensions 482w x 44h x 200d Net Weight 5kg TROUBLESHOOTING The Bel 8110 is designed and constructed to ensure a long and fault free life but if a problem does occur the following guidelines are provided The unit is constructed using two main printed circuit
4. AL PRINTED CIRCUIT BOARD See PCB layouts 4 A small jumper link should be fitted to one of these pins if PAL was the previous setting Remove this and locate across both link pins Shorting LK1 5 Re fit the cover plate and power cable 6 Power on the 8110 7 Delay set increments will now be in steps of 33ms 1 field NTSC REAR PANEL CONNECTIONS INPUT CONNECTOR 15 WAY MIN D FEMALE CH1 2 1 CH2 RIGHT IN 2 CH2 RIGHT IN CH2 LEFT IN 4 CH2 LEFT IN 5 CH1 RIGHT IN 6 CH1 RIGHT IN 7 CH1 LEFT 8 CH1 LEFT INPUT CONNECTOR 15 WAY MIN D FEMALE CH3 4 1 CH4 RIGHT IN 2 CH4 RIGHT IN 3 CH4 LEFT IN 4CH4LEFT IN 5 CH3 RIGHT IN 6 CH3 RIGHT IN 7 CH3 LEFT IN 8 CH3 LEFT IN OUTPUT CONNECTOR 15 WAY MIN D FEMALE CH1 2 1 CH1 LEFT OUT 2 CH1 LEFT OUT 3 CH1 RIGHT OUT 4 CH1 RIGHT OUT 5 CH2 LEFT OUT 6 CH2 LEFT OUT 7 CH2 RIGHT OUT 8 CH2 RIGHT OUT OUTPUT CONNECTOR 15 WAY MIN D FEMALE CH3 4 1 CH3 LEFT OUT 2 CH3 LEFT OUT 3 CH3 RIGHT OUT 4 CH3 RIGHT OUT 5 CH4 LEFT OUT 6 CH4 LEFT OUT 7 CH4 RIGHT OUT 8 CH4 RIGHT OUT 9 GND CHASSIS 10 GND CHASSIS 11 GND CHASSIS 12 GND CHASSIS 13 GND CHASSIS 14 GND CHASSIS 15 GND CHASSIS 9 GND CHASSIS 10 GND CHASSIS 11 GND CHASSIS 12 GND CHASSIS 13 GND CHASSIS 14 GND CHASSIS 15 GND CHASSIS 9 GND 10 GND 11 GND 12 GND 13 GND 14 GND 15 GND 9 GND 10 GND 11 GND 12 GND 13 GND 1
5. Operators amp Service manual Del DIGITAL AUDIO Model 8110 8 channel audio display BEL Digital Audio Ltd Invicta Works Elliott Road Bromley Kent BR2 9NT UK Tel 44 0 20 8460 7299 Fax 44 0 20 8460 0499 Email sales michael stevens com Web www bel digital com INTRODUCTION FEATURES OPERATION Input Sensitivity Delay Setting To Set Delay Increments to NTSC REAR PANEL CONNECTIONS Cable Recommendation EMC COMPLIANCE SPECIFICATION TROUBLESHOOTING FRONT VIEW REAR VIEW BLOCK DIAGRAM SERVICE INFORMATION SETUP To Remove Power Supply To Remove Main Printed Circuit Board To Remove Filout Daughter Board N N 4 001012 BEL 8110 8 Channel Audio Delay INTRODUCTION The cost effective Bel 8110 audio delay is designed specifically for synchronising audio to video in post production areas where video delays result from the VT editing and video effects units etc It is intended for use where the video delay is known and is likely to be constant or when frequent changes of delay are not required The Bel 8110 may be used in a fixed location with each channel dedicated to a specific item of video equipment Independent A D and D A converters are employed for each channel Each stereo pair of delay lines is switchable in fields PAL NTSC 0 to 15 7 5 frames An input level pre set potentiometer a signal present and peak LED are fitted for each stereo pair The Bel 8110 user co
6. TO REMOVE MAIN PCB s 8110 DIGITAL AND 8110 ANALOGUE Power off Bel 8110 and disconnect IEC power plug from inlet socket 1 Remove cover screws 16 and cover 2 Remove 8 off Hex post fixings on analogue input output sockets 3 Remove 7 off PCB fixing screws see drawing 4 Remove power supply connector 8 PIN Molex see drawing and 2 off Ribbon connectors PL2 and PL3 from Digital PCB 5 Remove 5 off socket screws from underside of front fascia 2 centre heat sink screws see drawing and 4 larger PAN head front panel fascia fixing screws 6 Gently pull front panel including fascia forward and remove 7 Pull forward the 2 PCB s 8110 Digital and 8110 analogue to disengage the 4x 15 way D connectors from the rear panel and lift out together with heat sink 8 Disconnect PL1 SK1 to separate boards Re assemble in reverse order pressing gently on the heat sink to allow location of fixing Screws HEATING FlIXIME SOEs FF rh TER VULT CHANGE PCH FEG SCREW x wer Ja 8110 POSITIONS AND HEATSINK FIXING POSITIONS TO REMOVE THE FILOUT DAUGHTER BOARD 1 With the cover removed as in To remove main PCB s locate filout daughter board see PCB layout diagram 2 Grasp the PCB at both ends and pull gently and evenly upwards releasing the two plastic pillars which will remain in the mother board 3 Keep an
7. boards and four sub assembly boards The two main PCB s carry the digital processing 8110 digital and analogue digital input output systems 8110 analogue Four smaller PCB s carry 1 The filter and output circuits 8110 filout this board plugs into the connectors on the 8110 analogue board 2 A system power supply PCB 3 Delay set switch PCB 4 LED indicator PCB All of the printed circuit boards can be rapidly removed or replaced see servicing section If the outline fault finding suggestions which follow are unsuccessful contact your Bel distributor or the main Bel distributor who will advise you and arrange for the unit to be repaired or provide replacement PCB s Fault Cause Action Dead unit Power supply Check fuses in the IEC and supply connectors then check fuses and connectors on the power supply Distorted output Headroom Check PPI indicators Input signal too high constant red indicator means Input sensitivity control signal level too high set too high reduce by adjusting input sensitivity control No delay on audio signal Delay set switch set Set required field delay by at 0 BYPASS adjusting delay set switch Hum noise channel cross talk Input output cables not Use individually screened individually screened pairs pairs multiway cable BELDEN or similar 7H09 05 s e VS 0 AsLL 0LL s e vsz o 082 022 ONILWY 3Sn3 NI JAYI 011 1Y 11910 138
8. evel of CH2 LEFT monitor clipping at PL2 10 TO SET PROCEED AS FOLLOWS With 6db 1kHz SINEWAVE at CH1 LEFT INPUT and a level meter and 600 W load connected to CH1 LEFT OUTPUT 1 Locate PL2 on 8110 Filout PCB daughter board and monitor PIN 14 Using an oscilloscope 2 Increase INPUT SENSITIVITY CONTROL for CH1 until clipping just occurs at the monitored PIN 3 Adjust RV6 for 15db RMS on level meter 4 Move input signal and output monitor to CH1 RIGHT repeat steps 1 and 2 on CH1 RIGHT OUTPUT PL2 PIN13 RV5 5 Reduce level by adjusting CH1 input sensitivity until output is 6db RMS 3level meter 6 Check balance between CH1 LEFT and CH1 RIGHT and trim either RV5 or RV6 to balance 7 Repeat steps 1 6 for CH2 CH3 and CH4 monitoring and adjusting the relevant PINS and Pre sets listed above TO REMOVE POWER SUPPLY The power supply can be removed with all other boards in place proceed as follows 1 Remove power supply fixing screws 4 off 3 on the chassis side 1 and on the underside of chassis see drawing 2 Disconnect all connectors from the power supply printed circuit board PL1 PL2 2 off 3 Tilt power supply towards the chassis side and lift out 4 Re assemble in reverse order making sure the spacer under the power supply chassis heat sink is properly located See drawing scree SE Au PANEL 7 D TRANS EVER TRACE LAIN BL DESLIDE
9. ntrols are recessed to prevent inadvertent operation Master signal bypass is effected by relays in the event of a power loss FEATURES Refer to front and rear views of the Bel 8110 on pages 7 8 for control connector positions The front panel has four INPUT SENSITIVITY controls with Peak and 20db LED indicators above each control These are used to set the correct operating signal level The delay settings for each channel are set by the four Rotary switches 16 position positioned on the left side of the front panel Each position increases or decreases the set delay by 1 field PAL 20ms and the 0 zero position switches the channel to BYPASS Maximum delay setting is therefore 15 FIELDS 7 5 frames The INPUT and OUTPUT connections are made via four 15 way FEMALE connectors on the rear panel Two for the INPUTS and two for the OUTPUTS Refer to PINOUT information on Page 3 Also on the Rear panel is an EMI filter block with IEC Power socket fuse and ON OFF switch and a voltage selector SENSITIVITY To set the INPUT SENSITIVITY firstly set the delay switches to 1 FIELD DELAY and the INPUT SENSITIVITY controls fully counter clockwise With a signal 1kHz SINEWAVE of at the input socket channel 1 left rotate the INPUT SENSITIVITY control clockwise and either monitor or measure the signal at the OUTPUT socket channel 1 left until it is 6db UNITY GAIN Repeat above f
10. or the other 3 channel pairs The LED indicators above each control show signal present 20db and peak Maximum signal output just before clipping into 600 W load is 15db Can be adjusted internally hence with a 6db input the headroom will be 9db DELAY SETTING NOTE An internal jumper is used to select either PAL or NTSC field increments See below The four Rotary switches 1 per channel pair are used to set multiples of field delays 20m PAL or a RELAY BYPASS The switches have sixteen positions and can be rotated in either clockwise or counter clockwise directions with click positions 1 15 increasing or decreasing the delay by 1 field Position 1 15 in PAL SET MODE 20 300 ms 1 15 fields Position 1 15 in NTSC SET MODE 33 495 ms 1 15 fields Position O in both PAL NTSC will put that channel pair into BYPASS connecting the INPUTS directly to the OUTPUTS On Power off or Power fail the BYPASS will be initiated as above regardless of the delay set switch position A BYPASS hold of approximately 1 second is initiated when the 8110 is powered on to allow random data in the memory to be purged before normal operation Switching to BYPASS in normal operation will also have this hold time Set the other channel pairs as above TO SET DELAY INCREMENTS TO NTSC FIELD 33ms 1 Power off and disconnect the power cable from the 8110 2 Remove the cover plate 3 Locate LK1 on the DIGIT
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