ARRI M-Series ARRIMAX 18/12 User manual

S E R V I C E M A N U A L
Date: April 23, 2019
Supported Models
L1.37950.B
ARRIMAX 18/12

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Version History
Version
Author
Change Note
03/2019
S. Papke
Original version
Table of Contents
Version History ..................................................................................................................2
Table of Contents...............................................................................................................2
Important Information........................................................................................................3
Safety Instructions.............................................................................................................3
General Safety Requirements for Operating Lamphead Systems................................3
Required Tools...................................................................................................................4
Disassembling Order.........................................................................................................5
Safety Switch Activator (SSA)..........................................................................................6
Lens Door ...........................................................................................................................7
Reflector: Replacement and Maintenance ......................................................................8
Back Housing.....................................................................................................................9
Lamp Carriage Removal..................................................................................................10
Lamp Carriage Adjustment.............................................................................................13
Lamp Cables.....................................................................................................................15
Fan Cooling System & Maintenance..............................................................................16
Remove Bottom Plate and Skid......................................................................................17
Maintenance and Care.....................................................................................................18
Visual Inspection .............................................................................................................18
Cleaning............................................................................................................................18
Testing of Mechanical Components ..............................................................................18
Contact..............................................................................................................................20
Further Information..........................................................................................................20

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Important Information
This instruction supports only the models listed on page 1. If your model is not listed, please visit
www.arri.com/service-lighting for more information. Also, these instructions are for qualified ARRI service
personnel only. If you are not familiar with the handling of components that can be destroyed by high voltage
or electrostatic discharge, please do not use these instructions and contact the ARRI Lighting Service Team.
Safety Instructions
The following instructions contain helpful advice on how to operate your ARRI lamp head safely. Lamp
heads, lamp head systems and accessories may only be operated and used by qualified persons and only
for professional lighting purposes. Relevant operating instructions must be followed for the equipment you
are using. Please also refer to the Ordinance on Industrial Safety and Health as well as the relevant
guidelines and regulations of your national Industrial Injuries Corporation (e.g. BGI 810-1, -3 and -4, BGV A1
for Germany; OSHA or ESTA for USA; etc.). Please refer also to our leaflet "Operating your ARRI Lamp
heads safely" L5.70431.E
General Safety Requirements for Operating Lamphead Systems
Relevant Hazard Symbols and Warnings
The following symbols relate to all repairs in this manual. Use care and caution when repairing ARRI
Products.
Warning of crushing / hand injury
Warning of a pointed object
Warning of electrical voltage
a) Safety Requirements for Transport, Setup and Operation of lamp heads
» We recommend wearing suitable protective clothing when working with lamp heads in order to prevent
injuries and burns.
» In the interest of your own health and safety, we advise you to consider the weight of your lamp head and
accessories when carrying or lifting them and to observe the relevant precautions recommended by your
Occupational Safety and Health Administration (for Germany BGI 810-1).
» Please ensure that all electrical cables are routed in such a way as to prevent tripping hazards and
damage by vehicles. You can achieve this with the help of suitable signs, covers or cable crossovers.

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b) Safety Requirements Concerning Electrical Danger
» Please check the lamp head system and its electrical protection device before each use.
» The faultless function of the power supply and protection system must be ensured before connecting the
lamp head (e.g. grounding, circuit breaker).
It might be necessary to install additional protection measures; for example:
» the application of residual current operated protective devices (RCDs)
» the application of safety extra low voltage, protective separation or protective insulation
» equipotential bonding
Required Tools
1
Torx Screwdriver TX 20
2
Screwdriver Philips PH2
3
Ratchet: 13mm and 10mm
4
Allen Key size 1.5 mm
5
L4.85204.E Adjustment Pins G38 base (Set)

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Disassembling Order
The graphic shows the order in which the components must be removed to ensure a proper repair. All
components which are not preceded by a further assembly group can be exchanged directly.
Warning: Before starting the repair please take note of the safety instructions! Make
sure that the lamp head is fully disconnected from the mains and cooled down for a
minimum of 30 minutes before opening the cover or beginning the repair.
Safety
Switch
Skid
Fan
Cooling
Lens Door
UV
Protection
Glass
Reflector
Back
Housing
Lamp
Carriage

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Safety Switch Activator (SSA)
Set the Focus to Spot. The reflector is now in
position to open the lens door.
Loosen 1 screw (1.5 mm Allen key) directly
below the SSA. Do not remove.
Now you can move the SSA forward or
backwards to find the right adjustment.
To adjust:
•Allow a small amount of play (C) when
the silver pin (A) contacts the activator
(B).
•When closing the door listen for a
‘click’ sound.
•It should ‘click’ twice before the door
latch closes completely
If this is not adjusted properly than the safety
loop can be opened, and the lamp will not
strike.
Note: You can also measure the safety loop
refer to the wiring diagram.
Important: If the door latch is not adjusted
properly this affects the SSA function.
A
B
C

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Lens Door
Hold the lens door and then loosen and remove the
screw on the top (13mm ratchet.)
Lift the bottom out and tilt the lens door to the front
and slide out.
To exchange/clean the glass or wire mesh remove
12 screw (Philips PH2.)
6 screws around the rim and 3 pairs (6) on the
attachments.
To clean the glass, use a soft cloth and standard
glass cleaner.

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Reflector: Replacement and Maintenance
Remove 6 screws (PH2 Phillips.)
Reach inside the reflector and remove
as pictured.
Inspection/Maintenance points.
•Check if the reflector is dull or
matt, specifically if it is matt
towards the center.
•Check the reflector center rim
for signs of melting. Replace
dull, matt or melted reflectors.
•Clean the reflector with a soft
cloth and glass cleaner often.
Tip: If the reflector has a silver ring on
the inside rim (backside) it is the newest
version of reflector and the material is
thicker and has a longer lifespan.

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Back Housing
Remove 10 screws (10 mm ratchet) 6
(black) screws three on each side and 4
shorter silver screws which are located
on the top.
Turn the lamphead around to access the
screws in the back. Remove the 4 black
screws (Philips PH2) on the bottom half.
Holding the stirrup handles, lift the
housing up (min of 5 cm) and slide the
entire back housing off. Otherwise it is
possible to damage the insulation of the
HT Cables.

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Lamp Carriage Removal
Remove 4 screws (Torx 20) as shown.
Move the focus to flood and then you can
access two additional screws (Torx 20.)