Jands Event 4 User manual

Event 4 Technical Manual
Revision 1 19/07/99

Contents ii
Revision 1 - 07 July
1999 Event 4 TECHNICAL MANUAL
EMC COMPLIANCE
This product is approved for use in Europe and Australia/New Zealand and conforms to the following standards: AS/NZS 4251.1
(EN 55103-1), AS/NZS 4252.1 (EN 55103-2), AS/NZS 3260 (EN 60950).
To ensure continued compliance with EMC Directive 89/336 and the Australian Radio communications Act 1992, use only high
quality data cables with continuous shield, and connectors with conductive back shells. Examples of such cables are:
DMX, MIDI, Keyboard cables: Belden 8102 100% Aluminium foil screen, 65% Copper braid.
Video: Amtron FR2651 Flat round cable, woven shield.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not properly installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
-reorient or relocate the receiving antenna;
-increase the separation between the equipment and receiver;
-connect the equipment into an outlet on a different circuit from that to which the receiver is connected;
-consult the dealer or an experienced radio/television technician for help.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du
JANDS ELECTRONICS PTY LTD 1999
All rights reserved
DISCLAIMER
Information contained in this manual is subject to change without notice and does not represent a commitment on
the part of the vendor. JANDS ELECTRONICS P/L shall not be liable for any loss or damage whatsoever arising
from the use of information or any error contained in this manual.
It is recommended that all service and repairs on this product be carried out by JANDS ELECTRONICS P/L or it’s
authorised service agents. JANDS ELECTRONICS P/L cannot accept any liability whatsoever for any loss or
damage caused by service, maintenance or repair by unauthorised personnel, or by use other than that intended by
the manufacturer. JANDS lighting consoles must only be used for the purpose they were intended by the
manufacturer and in conjunction with the operating manual.
Manufactured in Australia by JANDS Electronics Pty Ltd (ACN 001 187 837)
40 Kent Rd (Locked Bag 15)
MASCOT NSW 2020
Sydney Australia
PHONE:+61-2-9582-0909 FAX:+61-2-9582-0999 INTERNET:http://www.jands.com.au

Contents iii
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1999 Event 4 TECHNICAL MANUAL
Table of Contents
Table of Contents .......................................................................iii
1. Introduction.............................................................................1-1
2. Equipment Description ..........................................................2-1
2.1 Tools...........................................................................................................................2-1
2.2 Disassembly...............................................................................................................2-1
2.3 Reassembly ................................................................................................................2-2
2.4 Precautions and Installation Notes.............................................................................2-2
3. Circuit Notes...........................................................................3-1
3.1 Processor Card ...........................................................................................................3-1
3.1.1 Boot ROM, FLASH, and RAM ..................................................................3-1
3.1.2 Trim procedure............................................................................................3-1
3.1.3 Battery.........................................................................................................3-2
3.1.4 Logic ...........................................................................................................3-2
3.1.5 Desk Lamp Dimmer....................................................................................3-2
3.1.6 DMX Outputs..............................................................................................3-2
3.1.7 Keyboard.....................................................................................................3-2
3.1.8 Expansion Bus.............................................................................................3-3
3.2 Front Panel Cards.......................................................................................................3-3
3.2.1 Card Select Jumpers....................................................................................3-3
3.2.2 LCDs...........................................................................................................3-3
4. DIP Switch Settings................................................................4-1
5. Boot ROM inbuilt menu, self tests, setups, etc....................5-1
5.1 Entering the Boot Menu.............................................................................................5-1
5.2 Menu Usage ...............................................................................................................5-1
5.3 Boot Menu..................................................................................................................5-1
5.3.1 Continue......................................................................................................5-1
5.3.2 Reload Software..........................................................................................5-1
5.3.3 Test..............................................................................................................5-2
CPU......................................................................................................................5-2

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1999 Event 4 TECHNICAL MANUAL
Bus .......................................................................................................................5-2
RAM.....................................................................................................................5-4
FLASH.................................................................................................................5-4
VGA.....................................................................................................................5-4
Ports .....................................................................................................................5-4
VGA.....................................................................................................................5-4
DMX 1 .................................................................................................................5-4
DMX 2 .................................................................................................................5-4
MIDI.....................................................................................................................5-5
Cards ....................................................................................................................5-5
Scan......................................................................................................................5-5
Activate................................................................................................................5-5
Misc......................................................................................................................5-6
DMX In................................................................................................................5-6
Vers......................................................................................................................5-6
Trash RAM ..........................................................................................................5-6
Boot......................................................................................................................5-6
6. Fault Finding Table.................................................................6-1
7. Maintenance............................................................................7-1
8. Technical Data and Specifications........................................8-1
Event 4 Specifications 8-1
9. Glossary of Terms...............................................................9-1
Appendix A: History of Modifications .......................................9-1
Appendix B: Connector Pinouts................................................9-1
Appendix C: Spare Parts............................................................9-1
Appendix D: DMX to MIDI adaptor.............................................9-1
Appendix E: 2 x DMX, MIDI signal combiner............................9-1
Appendix F: Circuit diagrams....................................................9-1

Contents v
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EV4CPU1 Circuit diagrams........................................................9-2
EV4MAST3 Circuit diagrams......................................................9-3
EV4ASN3 Circuit diagrams........................................................9-4
EV4PRE3 Circuit diagrams ........................................................9-5
EV4PAL3 Circuit diagrams.........................................................9-6
BKLTSML0 Circuit diagrams .....................................................9-7

Introduction
Revision 1 - 07 July
1999 Event 4 TECHNICAL MANUAL
1 - 1
1. Introduction
The Event 4 lighting control console is designed for stage, theatre, corporate, and live
music applications. It has been designed to control all equipment with a DMX-512
input. New fixture types can be added by modifying the fixture library disk if they are
not available on the existing release library.
The console has been designed with the capability for users to upgrade the software
without removing the base. This is achieved by inserting a diskette with the new
operating system, and selecting the appropriate options in the “boot menu”. The boot
menu also provides other functions, including console self tests.
Note that static sensitive devices are used throughout the console, and normal handling
precautions should be applied during service. Note also that connections should never
be made with the power switched on.
Metric fasteners are used almost exclusively throughout the console.
The Event 4 Operating Manual should be consulted for a description of desk
operation.
Jands recommends that all service procedures be performed by a Factory Authorised
Service Centre or the Jands Electronics Service Department.

Circuit Notes 3 - 1
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1999 Event 4 TECHNICAL MANUAL
2. Equipment Description
The Event 4 is constructed using a folded steel chassis, covered with a reverse
screened lexan. The decorative wooden ends are made from plantation growth native
Australian timber mounted on an aluminium former, which provides structural
rigidity. The timber also protects the fascia of the floppy disk drive. An additional pair
of front to back struts reduce flex and ensure front to back spacing is consistent with
the base.
A separate assembly is used to hold the power supply (PSU) and central processor
(CPU) cards. This bracket is removable as a complete pre-wired unit. A backpanel
vent next to the CPU card is removable from the inside and can be used to fit options.
2.1 Tools
With the exception of the base screws and D connector mounting nuts, metric
hardware is used throughout the console. The following tools are recommended:
•7mm nut driver
•5mm nut driver
•#1 Posidrive screwdriver
•#2 Posidrive screwdriver
2.2 Disassembly
Access to the console is through the base. To remove the base place the console face
down onto soft padding. Using the #2 posidrive screwdriver remove all (and only) the
silver screws, leaving the four black screws. The base can then be lifted away.
To remove the PSU/CPU assembly, disconnect all cables to the CPU and PSU, and
use the 7mm nut driver to undo:
•three nuts next to the power inlet socket,
•two nuts between the PSU and CPU,
•three nuts between the CPU card and the vent/option panel
Use the posidrive screwdriver to undo:
•two screws that hold the CPU tray to the chassis.
The assembly can then be removed by sliding it toward the front until it is clear of the
studs, then lifting it out of the chassis.
Note that the CPU card can be removed from the console without removing the
complete assembly. To remove the CPU card from the assembly:
•Remove all connections to the card
•Undo the D connector nuts
•Undo the nine PCB mounting screws
•Slide the CPU card away from the back panel until the D connectors are clear of
the assembly, and lift the CPU away.

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1999 Event 4 TECHNICAL MANUAL
The remaining PCBs may be removed by undoing the relevant screws, however
attention should be made to the following points:
•Faders should be pushed to their mid position before their knob is removed.
Failure to do so may result in damaged faders.
•The position of the address jumpers on the Palette and Assign cards should be
noted when they are removed so they can be correctly set during reassembly
2.3 Reassembly
Attention should be paid to the following during reassembly:
•LCDs and their windows should be wiped clean with a lint-free cloth before
assembly.
•Ensure the address jumper on Palette and Assign cards are set correctly. Note all
cards should only ever have one (1) address jumper installed. Refer to section 3.2.1
for further information on the card select jumper settings.
•When fitting the CPU ensure all connectors are properly installed, including the
DMX output connector. Also check that the DMX connector wiring is located
within the cutout section of the CPU card.
•The CPU trim procedure should be followed if either the CPU or power supply
have been changed, or if the trim has been inadvertently adjusted. Refer to section
3.1.2.
•Test the console fully before installing the base. This includes the disk drive, desk
lamps, back lights, and DMX outputs.
•Double check all flatcable latch connectors are closed before the base is installed.
•Do not overtighten the base screws.
2.4 Precautions and Installation Notes
The Event 4 should be installed in a position which allows sufficient ventilation
around the back panel vents – there should be at least 100mm clear space around the
back panel.
The Event 4 has been manufactured to comply with all CE/C-Tick regulations, and
uses plated panels to ensure minimal radiation emanates from the chassis. In order to
maintain compliance all panels and covers should attached using all screws. All
connections should be made using the recommended cable type. All back shells should
be connected to the cable shield.

Circuit Notes 3 - 1
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1999 Event 4 TECHNICAL MANUAL
3. Circuit Notes
The Event 4 uses a main CPU to provide all processing functions. The CPU
communicates with the front panel PCBs via the front panel card bus.
3.1 Processor Card
The major functional blocks are as follows:
Function IC Number
Core CPU IC1-8, IC33, IC30, OSC1
Boot EPROM IC25
FLASH ROM IC11-14
RAM Bank 1 IC16-19
Floppy Disk Drive Controller IC48
DMX output IC53, IC38, IC39, IC50, IC51
MIDI IC48, IC35, IC52
VGA output IC6, IC57-60, IC66
Reset/power fail/RAM power IC15
Real time clock IC31
Front Panel Card bus IC9, IC10
Expansion bus IC24, IC26-29
3.1.1 Boot ROM, FLASH, and RAM
The CPU memory consists of a Boot EPROM (IC25), four FLASH ROMs (IC11,
IC12, IC13, IC14), and four static RAMs (IC16-19).
The CPU card has the capacity to be fitted with a maximum of 2MBytes program
memory (four x 29F040 devices) and 2MBytes show memory (four x 512Kbyte
devices).
Only AMD brand 29F040 FLASH devices should be used with boot software versions
up to 0.5.
3.1.2 Trim procedure
The adjustment trim on the CPU card adjusts the point where the CPU is informed that
power is failing. If a console is dropping its memory, trimpot T1 may be out of
adjustment and should be adjusted as follows:
1. Save any necessary console information to diskette
2. Turn T1 fully anticlockwise
3. Place a shunt across J1
4. Switch console on and wait until it has completely started up
5. Slowly adjust T1 until LED L3 lights

Circuit Notes 3 - 1
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1999 Event 4 TECHNICAL MANUAL
6. Switch off console.
7. Remove shunt across J1
This procedure should be performed whenever either a new CPU or PSU is installed.
3.1.3 Battery
The lithium battery should last approximately 5 years from the date the battery was
made - note that a 4 year life from date of product sale would not be unexpected when
delivery and manufacturing times are allowed for. The battery should be considered
flat if its terminal voltage measures below 2.9 volts. Backup any required show data to
diskette before the battery is replaced.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the battery manufacturer. Dispose of
used batteries according to the battery manufacturer’s
instructions.
3.1.4 Logic
The logic requirements for the board are contained in two logic devices, IC33 and
IC53. These are in circuit programmable, and are programmed by connecting an
appropriate header to CONN3. If it is necessary to reprogram these devices in the
field, follow the instructions supplied with the kit.
3.1.5 Desk Lamp Dimmer
The desk lamp dimmer circuit consists of a PWM switching circuit protected by a
PTC polyswitch. The polyswitch will trip under overload conditions – when it does
LED L6 will extinguish. Due to the nature of the polyswitch it is necessary to either
disconnect all desk lamps or switch the console off for approximately one minute in
order for it to reset.
3.1.6 DMX Outputs
The DMX outputs are not opto-isolated, however a protection network decouples the
driver ICs from high voltages which may be applied during external mains faults.
After a fault has been removed these devices take approximately one minute to reset,
and during this time the output cables should be disconnected or the console switched
off.
3.1.7 Keyboard
The console is protected against excessive load current through the keyboard
connector by a polyswitch. After a fault has been removed this device takes
approximately one minute to reset, and during this time the keyboard should be
disconnected or the console switched off.

Circuit Notes 3 - 1
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1999 Event 4 TECHNICAL MANUAL
3.1.8 Expansion Bus
The expansion bus is provided to allow for options to be added in the future. The
expansion bus is a buffered extension of the system CPU bus. It is not compatible
with Jandshog, Event, or ESP2 type expansion bus option panels, and they should not
ever be installed.
3.2 Front Panel Cards
All front panel cards follow a design similar to that of other Jands consoles. A
multiplexed 8 bit data/address bus is used to exchange bytes of information between
the CPU and the front panel cards. The pin connections however are not compatible
and under no circumstances should Event, ESP2, and Jandshog type front panel circuit
boards ever be connected to an Event 4 CPU card. Damage will result.
3.2.1 Card Select Jumpers
A jumper on each Preset and Assign card selects the address of the card in the system.
When installing new cards ensure that the replacement card has its jumper in the same
position as the card it is replacing.
The correct jumper position for a Preset or Assign card is equal to its position from the
left eg. the left most Preset and Assign cards have their jumpers set to 0, the next have
it set to 1, etc. Master and Palette cards have no address jumper.
3.2.2 LCDs
The character LCD modules use a single backlight driver circuit to deliver the high
voltage required for all of the electroluminescent (EL) backlights. This is the function
of the EL driver board, mounted near the power supply. This board receives its power
and an analogue control from the CPU card.
Note that intensity of the character LCD backlights reduces with age. This is normal
and to minimise the reduction the backlights are deactivated if the console hasn’t been
used for a preset time. The backlights are immediately reactivated when any front
panel button is pressed.

DIP Switch Settings 3 - 1
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1999 Event 4 TECHNICAL MANUAL
4. DIP Switch Settings
NOTE: At the time of printing all DIP switches should be off for normal console
operation.
Dip SW1 - no function
Dip SW2 - no function
Dip SW3 - no function
Dip SW4 - no function
Dip SW5 - no function
Dip SW6 - Enable main code diagnostics
Dip SW7 - Execute software from RAM – use for development only
Dip SW8 - Reserved

Boot ROM inbuilt Menu, self tests, setups, etc 5 - 1
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1999 Event 4 TECHNICAL MANUAL
5. Boot ROM inbuilt menu, self tests,
setups, etc
The Boot ROM contains software that can be used to test, setup, and configure the
console. Note that the software is subject to change depending on the boot software
version.
5.1 Entering the Boot Menu
The boot menu is accessed by holding down the “RECORD” button on the keypad
while turning power on. Release the Record button when the opening menu is
displayed in the programmer LCD.
5.2 Menu Usage
Each menu offers a number of options available. The options are selected by pressing
one of the five buttons above the programmer LCD, or press EXIT to return to the
previous menu.
5.3 Boot Menu
The following menu options are available in the opening menu
1. Continue
2. Load FLASH
3. Test
5.3.1 Continue
Use this option to exit the boot menu and continue normal execution into the main
operating software. Use this option if the boot menu has been entered by mistake.
5.3.2 Reload Software
Selecting the Load FLASH option initiates the software reload sequence from diskette.
Ensure you have an Event 4 software diskette with the file “EVENT4.BIN in the drive
and follow the instructions on the LCD. Note that this facility should be used with
caution and it is not recommended that software be reloaded at a critical time, eg. just
before the start of a show.

Boot ROM inbuilt Menu, self tests, setups, etc 5 - 2
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1999 Event 4 TECHNICAL MANUAL
5.3.3 Test
The following menu options are available in the Test menu:
1. CPU
2. Ports
3. Cards
4. Misc
5. Boot
Tests may be run continuously or once as required.
CPU
Use this option to test parts of the CPU card. When selected the following options are
displayed:
1. Bus
2. RAM
3. FLASH
4. VGA
Bus
The Bus exercise is not a test as such, but is used to debug CPU cards that have
fundamental faults, such as factory testing of newly manufactured CPU cards.
The CPU has been programmed to output sequences of events that can be seen on a
CRO, synchronised to the edge of L5 and L4. The data can be used to verify the
correct operation of the CPU control signals.
The sequence of operations performed during this routine are shown in table 3.
Event Signals of
interest Comment
Set Green LED L5 on L5 CRO Synchronisation
Set Green LED L5 off L5 CRO Synchronisation
Move 01 to 40010004 IC16 pin 29 Write to RAM bank 0 byte 0
Move 02 to 40010005 IC17 pin 29 Write to RAM bank 0 byte 1
Move 04 to 40010006 IC18 pin 29 Write to RAM bank 0 byte 2
Move 08 to 40010007 IC19 pin 29 Write to RAM bank 0 byte 3
Move 40010004 to
CPU IC16-19 pin 24 Read from RAM bank 0
Set Red LED L4 on L4 CRO Synchronisation
Set Red LED L4 off L4 CRO Synchronisation
Move 10 to 20000000 IC13 pin 29 Write to FLASH byte 0
Move 20 to 20000001 IC14 pin 29 Write to FLASH byte 1
Move 40 to 20000002 IC12 pin 29 Write to FLASH byte 2

Boot ROM inbuilt Menu, self tests, setups, etc 5 - 3
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1999 Event 4 TECHNICAL MANUAL
Move 80 to 20000003 IC11 pin 29 Write to FLASH byte 3
Move 20000004 to
CPU IC11-14 pin 24 Read from FLASH
Move AA to 606A0000 IC65 pin 13 PC Memory Write
Move 606A0000 to
CPU IC65 pin 14 PC Memory Read
Move 55 to 60000000 IC65 pin 50 PC IO Write
Move 60000000 to
CPU IC65 pin 49 PC IO Read
Table 3: Bus exercise event summary
Figure 1 shows the relationship between L5, IC16 WR, and the CPU DACK signals as
measured while running this test.
Figure 1: Sample waveform during Bus Exercise
Trace #1: L5
Trace #2: IC16 Pin 29 (WR)
Trace #3: IC1 pin 44 (DACK1)
Trace #4: IC1 pin 43 (DACK0)

Boot ROM inbuilt Menu, self tests, setups, etc 5 - 4
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1999 Event 4 TECHNICAL MANUAL
RAM
The system RAM is checked for correct operation. This test requires approximately 2
minutes to execute.
FLASH
The system FLASH is checked for correct operation. This test requires approximately
50 seconds to execute. Note that due to the limited number of write cycles available in
FLASH devices, it is not recommended that this test be run continuously.
VGA
The VGA controller is initialised and a memory test is performed on its RAM. This
test takes approximately 17 seconds to execute and during execution a VGA monitor
will show the memory test patterns.
Ports
Use this option to test the ports of the CPU card. When selected the following options
are displayed:
1. VGA
2. DMX1
3. DMX2
4. MIDI
VGA
Test bars are displayed on the VGA and LCD screens for the purpose of checking
colour (VGA) and grey scaling (LCD). Press enter to return to the normal menu when
the screen results have been viewed.
DMX 1
The DMX1 output is connected to the MIDI input via the adaptor cable shown in
Appendix D, or the combiner circuit shown in Appendix E. When the test is run the
DMX1 output is exercised and the results read back into the MIDI input. The test takes
about 3 seconds to complete.
DMX 2
The DMX2 output is connected to the MIDI input via the adaptor cable shown in
Appendix D, or the combiner circuit shown in Appendix E. When the test is run the
DMX2 output is exercised and the results read back into the MIDI input. The test takes
about 3 seconds to complete.

Boot ROM inbuilt Menu, self tests, setups, etc 5 - 5
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1999 Event 4 TECHNICAL MANUAL
MIDI
The MIDI output is connected to the MIDI input via a standard MIDI link cable. When
the test is run the MIDI output is exercised and the results read back into the MIDI
input. The test takes about 3 seconds to complete.
Cards
Use this option to test the front panel cards of the console. When selected the
following options are displayed:
1. Scan
2. Activate
Scan
This test scans the front panel card bus and displays on the VDU the cards found.
When run continuously this test will activate the front panel card bus and the signals
can be used to troubleshoot faulty PCBs.
Activate
When run this test activates the front panel card bus as shown in Table 4, and can be
used to verify correct operation of the majority of the front panel controls. In general a
pressed switch is indicated by its associated LED (or the LCD if no LED available),
and fader values are displayed on the associated LCD or channel LED. The Channel
master levels and preset faders operate in familiar two preset mode, with the levels
appearing at both DMX outputs.
This test is terminated by pressing Exit.
Card Control Type Indication
Palette Palette select Associated LED
Assign Flash button Associated LED changes from
green to red
Assign Fader levels Associated LCD
Assign LCD contrast Controlled by Assign Fader #1
Master Buttons with red LED Associated LED
Master Buttons with Bicolour LED Associated LED turns from
green to red
Master Buttons with no LED LCD
Master Wheels LCD
Master Faders LCD
Preset Faders Associated Mimic LEDs
Preset Flash Buttons Associated Mimic LEDs
Table z: Front panel activation responses

Boot ROM inbuilt Menu, self tests, setups, etc 5 - 6
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1999 Event 4 TECHNICAL MANUAL
Misc
Use this option to run miscellaneous tests on the console. When selected the following
options are displayed:
1. DMX In
2. Vers
3. Trash RAM
DMX In
DMX signal from an external source is connected to the MIDI input using the adaptor
cable detailed in Appendix D. The DMX signal present is displayed on the VDU. Note
that both DMX outputs transmit a test data pattern that can be used to feed into the
input, however only one should be plugged into the MIDI input. Note also that the data
pattern changes each time the test is run.
Press Exit to terminate the test.
Vers
The software version of the test routines is output to L4 and L5 in flashes. The green
LED (L5) flashes once at the start of the test. The version is then displayed in red LED
(L4) flashes. The version is also displayed on the master LCD at startup, and for this
reason this test is mainly for use when no Master card is available.
Trash RAM
The system memory is completely cleared.
Boot
The console is restarted. This is generally used when use of the self tests has been
completed and it is desired to start the main operating software. Holding the Enter
button down immediately after activating this option allows re-entry to the self tests
and setups.

Fault finding table 6 - 1
Revision 1 - 07 July
1999 Event 4 TECHNICAL MANUAL
6. Fault Finding Table
Symptom Possible Cause Remedy
Console won’t run
Show memory corrupt Deep Clear
Program memory corrupt Reload program
Mains fuse blown Replace fuse in power inlet
Front panel config error on start up
Flat cable disconnected Check that all flat cable connectors
are locked closed
Faulty flatcable Replace flatcable
Circuit board not working Replace card
Console crash with message
“Address error exception” etc
Software Bug Write down message and forward
to Jands, then try reboot or
program reload
Console drops its memory
Flat battery Replace battery
Power fail circuit out of adjustment Re-trim T1 as per section 3.1.2
Console always shows error
Software bug Write down message and forward
to Jands, then RAM trash as
described in section 5.3.3.4.3
Console won’t write or read diskette
Disk not DOS format Format on a PC compatible
computer (DOS 3.0 and above)
Diskette damaged Replace diskette
Poor quality diskette Use quality diskette
Diskette drive damaged Replace diskette drive
Fixture not available for patching
Fixture library in console not up to
date or corrupt Load latest library from library
diskette.
No DMX output
Incorrect patch Check patch
Incorrect receiver address Check receiver
Faulty DMX cable Repair / replace cable
No line termination Terminate DMX line
Blown DMX driver Replace driver
Patch to other DMX output
Desk Lamp off
Short circuit lamp Remove short circuit then switch
console off for 1 minute
Level turned down Adjust level
Blown bulb Replace bulb
Radio Interference
Unearthed power cable Use earthed cable/outlet
Poor quality cables Use quality shielded cables
No intensity control from console
Grand Master down Adjust Grand Master
DMX
DBO button active Press DBO button
VGA monitor not working
Monitor not turned on Check power connection
Check power switch
Monitor not plugged into console Check VGA connection to console

Maintenance 7 - 1
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1999 Event 4 TECHNICAL MANUAL
7. Maintenance
If a console should start to misbehave or operate erratically, the problems encountered
can usually be attributed to one of two causes:
•normal wear and tear, eg. switches failing and becoming intermittent.
•physical abuse, eg. transit damage, spilt drinks, shorted cables.
Parts most likely to wear out in time with normal use include the following:
•switches
•faders
•LCD backlights
•digital encoders
These are generally easy to spot and there is little that can prevent such wear from
occurring, however careful use will maximise their life. Almost all parts of the console
can be damaged by physical abuse, however there are a number of things that can be
done to prevent this kind of damage:
•Cover the console when not in use, eg. before, after and between sets.
•ALWAYS insert a diskette into the floppy disk drive when the console is to be
transported. This prevents damage to the drive mechanism.
•Do not use spare audio lines for DMX cable. If so, there is a danger that the
connector will get plugged in to the wrong signal.
•Do not smoke over the console.
•Do not obstruct the rear ventilation holes.
•When cleaning, do not use solvents and never allow the entry of liquids into the
console. Use only a damp soft cloth for cleaning.
The console operating software is extremely complex. It is recommended that the
console be deep cleared at the start of each new tour.
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