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!!! CAUTION - Important Notes !!!

SERVICE SECTION

22.0

Service section

!!! WARNING - Refer all servicing to qualified service personnel !!!

Risk of electric shock if the unit is opened.

BSS Audio accepts no responsibility for injury

subsequent to opening of the unit.

The primary of the mains transformer within the FDS-388 is protected against
high voltage spike interference by two voltage dependent resistors. These
provide a short circuit to voltage peaks in excess of their maximum rating.

Should the FDS-388 be inadvertently connected to 3 phase line/line voltages,
or to 240V when selected to 120V, or any other incorrect voltage, these
suppressors are likely to fail in a protective short circuit mode. This will be
demonstrated by repeated mains fuse failure when powering up the unit.

Figure 22.1 indicates the location and specification for the suppressors.

22.1 Transient

Suppressor

Replacement

Figure 22.1 Suppressor

location

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Содержание Omnidrive FDS-380

Страница 1: ...1...

Страница 2: ...065 1993 Radiated Emissions USA FCC part 15 Class B Electrical Safety USA UL813 ETL 1996 Commercial Audio Equipment Electrical Safety CAN UL813 ETLc 1996 Commercial Audio Equipment IMPORTANT SAFETY IN...

Страница 3: ...ms Press the RECALL key again to recall the selected program If there is no program suitable then the user will need to set up the unit from scratch to suit the PA manufacturers specification after re...

Страница 4: ...control These can remind the user of a control s operation if the section has already been read Throughout the text there are references to other areas in the following form Refer to Section 16 0 Rec...

Страница 5: ...3 1 Output Section 14 4 0 Getting Around the FDS 388 15 5 0 Default Screen 20 6 0 Default Utility Screen 22 7 0 Delay Screen 24 8 0 Delay Utility Screen 26 9 0 EQ Screen 28 10 0 EQ Utility Screen 30...

Страница 6: ...ntrols 50 21 2 Midi Operation 51 21 3 PC Card Operation 51 22 0 Service section 52 22 1 Transient Suppressor Replacement 52 22 2 100V Tap Conversion 53 23 0 Warranty Information 54 Appendix A 55 A 1 F...

Страница 7: ...uick and easy setup The crossover sections can be configured as stereo 2 3 or 4 way with the option of setting one stereo band as a mono lo output for sub bass processing Various filter types may be s...

Страница 8: ...rear by additional bracing or shelving if it is to be used in a transportable system Failure to do so may damage the case and invalidate the warranty Fig 2 1 details the relevant dimensions and fixing...

Страница 9: ...ector switch provides a simple external adjustment to allow operation on all international AC power standards The allowable ranges for the supply voltage are 99VAC up to 121VAC on the 120V position an...

Страница 10: ...ontinued safety that this specification is strictly adhered to Spare fuses of the correct rating are supplied with the unit from new It is unlikely that the AC fuse will fail during normal use and cau...

Страница 11: ...retrofit option Pin 1 Shield Ground Pin2 Signal Hot Pin3 SignalCold F 2 Channel inputs The FDS 388 audio inputs are electronically balanced Transformer balancing is available as a retrofit option Pin...

Страница 12: ...p leds are driven from the input circuitry and indicates input overload The lower pair of clip leds indicates overload at one of several points through the dsp circuitry Overload in the dsp section is...

Страница 13: ...ch band XOver For adjusting band crossover frequencies and slopes and for setting band gains and limiter thresholds Each screen has an associated blue led which is on whilst the user is in the screen...

Страница 14: ...d The Over led lights at 6dB above the limit threshold when the limiter is on and is left on permanently when the limiter is switched off as a warning Refer to Section 11 0 XOver Screen Limit E Gain t...

Страница 15: ...tion one of the leds will flash to show that the two channels now have different parameter values There are several important points to note about the Split mode operation The FDS 388 was designed pri...

Страница 16: ...een through each of the main editing areas in turn and then back to the main Default screen Pressing and holding the EDIT key will take the user back to the main Default screen from any edit screen Pr...

Страница 17: ...on the cur rent screen Two lines of text for each key on the left hand side of the screen label the key s function Turn the encoder knob to adjust the currently selected variable Press the encoder kn...

Страница 18: ...e internal gain and limiter thresholds for each band Refer to Section 11 0 Xover Screen The blue leds above the EDIT key always show which of the three edit areas the user is in The UTILITY key takes...

Страница 19: ...e to adjust For example in the Delay screen pressing the middle soft key moves the highlight to one of the band delay values Pressing the encoder now moves the highlight around the four band delays Tu...

Страница 20: ...ow pass crossover rolloffs in addition to any equalisation filters that have been used and that are not hidden The rolloff frequencies are adjusted in the XOver Screens refer to Section 11 0 XOver Scr...

Страница 21: ...d program Once edited the program number is displayed with normal size text An edited program is also indicated with an asterisk in the centre of the top row The letter A or B denotes which backup swa...

Страница 22: ...e and humidity messages are output on all chan nels Met Temperature and humidity messages are output on all channels Thru Thru outputs all input data mixed with any dump data requested by an external...

Страница 23: ...0 System Security Power Up Mute 5s to 60s This utility allows the user to adjust the time between powering up the unit and the outputs being returned to the mute status that was set prior to the unit...

Страница 24: ...o the left of the screen represents the listener the line a little to the right of the ear represents the overall delay of the unit This line does not however move as the overall delay changes it is t...

Страница 25: ...ected then the speaker icons for ALL the members of the group will be shown highlighted If any of the delays reaches zero or the maximum delay allowable approximately 635milliseconds at 20 C 68F then...

Страница 26: ...hannels to link Adjusting any of the three delays in the pack will now change all three preserving the time settings within the pack Note that only adjacent bands can be linked and that the setting AB...

Страница 27: ...turns high frequency absorption correction on and off This is used in conjunction with Meteorology below Refer to Section 20 0 Meteorol ogy for more details Corrn Dist Adjustable 0 to 50metres This v...

Страница 28: ...or boost available at either end and adjust able slope of 6dB or 12dB per octave At the top left of the screen are the name of the current band and the bandletter and filter number of the current filt...

Страница 29: ...be missed out If no filters are available it is not possible to enter the EQ Screen Top Soft Key FR Hz Bottom Soft Key dB Pressing the Middle Soft key and turning the parameter wheel adjusts the band...

Страница 30: ...7 0 Delay Screen Note that it is always filter 2 in each band that is taken for phase adjustment Each band is adjustable individually and it is the current band s value of Phase Normal that is adjust...

Страница 31: ...adjustment is preset to 2 1 The first graph below fig 10 1 shows the relationship between the signal level and the filter level with a boost filter The example shown has the dynamic threshold set to...

Страница 32: ...ntrol of the band gain and limiters The left hand end of the top line of the screen gives the master band edge roll off in dB per octave and the edge shape whether it is Linkwitz Riley L R Butterworth...

Страница 33: ...ach on off is represented by brackets around the limiter value When the brackets are NOT visible the limiter is ON for that band When the brackets are visible the limiter is OFF for that band but the...

Страница 34: ...fied to be 12 or 24dB Oct although this unit will allow users access to this shape at 18dB Oct Limit Units dBu mV This item changes the units used for the limiter threshold values on the XOver Screen...

Страница 35: ...35 XOver Utility Screen Top Soft Key XOver More Pressing the top soft key in the XOver Utility Screen will take the user to the XOver More screen See next Section 13 0 XOver More Screen...

Страница 36: ...en gives the user access to the low level adjustment of individual edge slopes and frequencies It also contains the selection of names for each band To the left of the top line are the band name of th...

Страница 37: ...shapes with 18dB per octave Selecting the bottom soft key allows the user to adjust the frequency of each band edge individually In this way two bands can be made to crossover at a different level to...

Страница 38: ...d for both channels regardless of the setting of the SPLIT LEDs All the current parameters related to the audio path are saved in the program such as crossover frequencies levels limit thresholds equa...

Страница 39: ...rchive storage If the current parameters have been changed since the last program store or recall operation this condition is indicated by the program number being shown in small characters or by an a...

Страница 40: ...When storing a file to a card program the file name will default to the current user name If the user wishes to use a different file name from the current user name then select NAME and enter a card...

Страница 41: ...iddle Soft Key TYPE The middle soft button will select the TYPE of program or file which may be adjusted by the parameter wheel from the default INTernal setting to either of the PCMCIA memory card se...

Страница 42: ...n programs are stored Top Soft Key FORMAT CARD Bottom Soft Key DELETE FILE Pressing the Top Soft Key will ask if the user wishes to lose all data on the Smart Card If the user then presses the Top Sof...

Страница 43: ...y is not required and is not used The most appropriate card size for the FDS 388 is the 256k byte card which can hold up to 14 complete setup XAL files 18 1 Card Types SRAM CARDS 128k 256k 512k 1M 2M...

Страница 44: ...Structure CIS information BSS has tested and developed the Card filing system using an IBM compatible PC card reader and a range of palm top computers but cannot guarantee that the cards can be read...

Страница 45: ...available to be adjusted When Lock Mode is ON the Default Screen will display the unit s logo along with the current program number and names Refer to Section 6 0 Default Utility Screen Lock Mode Lock...

Страница 46: ...Screen Lock Mode To turn OEM Lock ON or OFF the user will be asked to enter the current password Once in the OEM Hide Screen the user can change the password Refer to Section 18 6 OEM Hide Screen OEM...

Страница 47: ...allow users limited access to the parameters Hidden param eters are not visible in their respective edit screen and therefore not adjust able The designer may for example not wish the user to see eq...

Страница 48: ...adjust their values respectively The letters can be adjusted to any member of the alphabet or space with the exception of the first letter which cannot be space this is to force OEM designers to passw...

Страница 49: ...ON when adjusting the house EQ The compensation is always in the form of a 6dB Oct high shelf providing various amounts of boost The actual boost value set is not only determined by temperature and hu...

Страница 50: ...ing the current program number C 0 1 If the midi channel select buttons are pushed the display will show the current midi channel number E 0 1 Errors are displayed as an error code Appendix B contains...

Страница 51: ...program change messages sent to its channel All variables in the unit can be adjusted over midi If a variable in the unit has been edited by changing it s value over midi the right hand decimal point...

Страница 52: ...e by two voltage dependent resistors These provide a short circuit to voltage peaks in excess of their maximum rating Should the FDS 388 be inadvertently connected to 3 phase line line voltages or to...

Страница 53: ...e box on the 120 240V selector locate the purple and brown wires and reverse their positions Locate the orange and yellow wires and reverse their positions Fuse values do not change from that required...

Страница 54: ...ler with shipping prepaid You should include a statement listing the faults found The unit s serial number must be quoted in all correspondence relating to a claim We recommend that you record your pu...

Страница 55: ...O NRPN MSB 99 X O Data LSB 38 X O Data MSB 6 X O PROGRAM CHANGE 0 59 0 59 True Number 1 60 1 60 SYSTEM EXCLUSIVE Dump Request X O Dump Follows O O Program follows X O Program Request O O RTA Request...

Страница 56: ...ansformer balanced option Input Impedance 10k Maximum Input Level 20dBu balanced Outputs Electronically balanced floating Transformer balanced option Maximum Output Level 20dBu into 600 Channel Separa...

Страница 57: ...d Bad format E30 Bad card write E31 No space on card E32 File does not exist E33 File error E34 There is no card E35 The card is write protected E36 DATA directory not found E38 Wrong flash card manuf...

Страница 58: ...oard unplug it from the large analogue output board 3 Unplug the small PLL board from the analogue output board The pins on the new AES3 PLL board may be protected with a plastic cover or an IC socket...

Страница 59: ...left corner Newer units have four screws at the front and four between the output xlr connectors at the back 6 Remove the 16 plastite screws fixing the output XLRs in place 7 Remove the analogue outpu...

Страница 60: ...ency input and four male XLRs for AES3 Output With the AES3 I O board fitted it is possible for the user to select AES3 or Analogue input from the Default Utility screen The unit can be operated witho...

Страница 61: ...re Screen Edit Key 13 19 20 edited flag 21 28 36 39 51 EQ Filter 28 Cut and Boost 29 dynamic eq 28 Frequency 29 Symbols 21 28 36 39 10dB switch 11 led 12 50 A Absorb Corrn See Delay Utility Screen abs...

Страница 62: ...ty Screen limiter threshold 14 30 31 32 33 units 34 Linkwitz Riley See crossover edge shape Lock Mode45 48 See also Default Utils Screen logo files 44 M MAIN DELAY See Delay Screen mains input 11 Mast...

Страница 63: ...tting 42 44 Recalling 38 41 SRAM 43 Storing 38 39 40 Smart card format 43 Soft Keys 19 overview 12 Specification 56 58 Split Keys 13 SRAM card 43 Store Key 12 19 20 38 39 40 Card Programs 38 39 40 Int...

Страница 64: ...64 User Notes...

Страница 65: ...65 User Notes...

Страница 66: ...66 User Notes...

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