AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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Head-Up Display (HUD)
Dis/assembly Instructions
Version 1.2
February 2017
Written by Tino de Rijk
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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Table of Contents
1. Introduction ........................................................................................... 3!
1.1! Reason for this manual ................................................................................ 3!
1.2 Servicing ......................................................................................................... 3!
1.3 Copyright and Applicable Law ........................................................................ 3!
2. Exploded Diagrams and Parts Lists ..................................................... 4!
2.1 HUD assembly at the Lid ................................................................................ 4!
2.2 HUD assembly at the Mouthpiece .................................................................. 5!
3. Tools ..................................................................................................... 6!
3.1 Special Tools needed ..................................................................................... 6!
3.2 Standard Tools needed .................................................................................. 6!
4. HUD disassembly ................................................................................. 7!
5. HUD assembly .................................................................................... 10!
8. Testing Instructions ............................................................................ 17!
8.1 Test for proper operation .............................................................................. 17!
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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1. Introduction
1.1 Reason for this manual
The AP Diving Inspiration and Evolution line of rebreathers are fitted as standard with a twin
Head-Up Display, further referred to in this manual as HUD.
The HUD is a “static” device, in the sense that it does not contain moving or electrical or
mechanical serviceable parts. It is designed to operate wet.
So although generally speaking the HUD does not need regular servicing or maintenance,
there are a few reasons why you might want to disassemble and assemble the HUD:
- To swap it from the left-side position to the right-side position on the mouthpiece in order
to create a better view for the diver when e.g. the position on the left side is blocking the
view of other diving instruments; The HUD can easily be moved to the right side of the
mouthpiece but then the red lights will appear on the bottom and the green on the top
and the controller 1 lights will be on the right instead of the left. By following the
procedures in this manual you can change the fibre optics to set the “lights” back to their
original positions: Controller 1 on the left, Controller 2 on the right, green lights on the
bottom and red lights on the top.
- When the HUD lights are too dim and adjusting them in the software does not solve this
problem. In that case disassembling and inspecting and cleaning the HUD connection to
the lid could help in diagnosing the problem.
1.2 Servicing
Before servicing the AP Diving HUD you must receive instruction and certification in servicing
it by AP Diving.
Without the correct training it is possible to render the HUD inoperable or even damage the
rebreather lid.
The Inspiration, Evolution and Evolution+ closed circuit rebreathers’ CE certification to
EN14143 is unaffected by servicing the HUD or swapping it from left to right, provided that
the alternate position does not affect the operation of the rebreather.
The AP Diving HUD meets the requirements of the Personal Protective Equipment Directive
89/686/EEC – CE certification when fitted to an AP Diving rebreather.
WARNING: when servicing the HUD it is VERY important that all parts that may suffer
wear and tear get replaced. It is also very important that the correct tools are used to avoid
damaging any part of the fibre optics in the disassembly and assembly process.
Please don’t try to save money by re-using parts that really should be replaced during a
proper servicing action.
1.3 Copyright and Applicable Law
These instructions are copyrighted, all rights reserved. It may not, in whole or in part, be
copied, photocopied, reproduced, translated, or reduced to any electronic medium (including
the Internet) or machine-readable form without prior consent in writing from AP Diving.
All products are sold on the strict understanding that only English Law applies in cases of
warranty claims and product liability, regardless of where the equipment is purchased or
used. Should a claim be made then the venue for this would be in Truro, England.
© 2017 AP Diving.
Head-Up Display (HUD) Service Manual
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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2. Exploded Diagrams and Parts Lists
2.1 HUD assembly at the Lid
NUMBER
DESCRIPTION
PART NUMBER
QUANTITY
1
Fibre optic cable
RB_80_A
1 2 HUD cable ring
RB_80_08
1 3 HUD cable collet
RB_80_09
1 4 HUD locking clamp
RB_80_07
1 5 HUD fibre guide
RB_80_03
1
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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2.2 HUD assembly at the Mouthpiece
NUMBER
DESCRIPTION
PART NUMBER
QUANTITY
1
HUD clip (set of three sizes)
RB_80_05S
RB_80_05M
RB_80_05L
3
1
1
2
HUD outer
RB_80_01
1 3 HUD inner
RB_80_02
1 4 HUD fibre guide
RB_80_03
1 5 HUD locking clamp
RB_80_07
1 6 HUD cable collet
RB_80_09
1 7 HUD cable ring
RB_80_08
1 8 Fibre optic cable
RB_80_0A
1
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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3. Tools
3.1 Special Tools needed
When servicing the AP Diving HUD no special tools are needed.
3.2 Standard Tools needed
The following standard tools are needed:
- 16 and 14 mm spanners
- (Access to) an ultrasonic bath for cleaning the parts.
WARNING: Do NOT use aggressive chemicals. They might damage the metal plating of
the hose ends. Use an ultrasonic cleaning bath with a suitable cleaning fluid. A very good
cleaning fluid is Biox “O2” immersion fluid. See WWW.BIOXINT.COM for further information
and distributors.
The use of rubber gloves while re-assembling the hoses is recommended to avoid rendering
them unclean due to human touch.
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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4. HUD disassembly
- Hold the HUD Locking clamp (RB80_07) with a 16mm spanner.
- Unscrew the HUD cable ring (RB80_08) with a 14mm spanner (anti-clockwise).
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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- Push the HUD cable ring nut up along the cable.
- Gently wiggle the fibre optic cable sideways, backwards and forwards until the cable
collet (RB80_09) comes out far enough to pull it out with your fingers:
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- Slide the cable collet up the cable:
- Once the cable collet is clear of the locking clamp, as shown, use a 16 mm spanner to
loosen the HUD Locking clamp (RB80_07) by unscrewing it anti-clockwise.
- Unscrew the HUD locking clamp all the way and slide it up cable.
- The fibre optic cable and cable clamp can now be pulled together from the lid recess.
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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5. HUD assembly
- Switch the Vision handset on by pressing and holding the left button for 1 second.
- Controller 1’s LEDs (one red and one green) should light up, followed by Controller 2’s
LEDs.
- Clean the round glass window with a wet piece of paper or a cotton swab.
Do NOT use any chemicals!
- If any of the 4 LEDs do not light up, the lid should be returned to the factory.
- If you want the HUD to come in from the left on top of the mouthpiece, hold the HUD so
that the cable comes in from the left.
- Point the lid-end of the cable end at a bright light source, taking care not to touch it onto
a hot surface.
- WARNING: the fibre optic rods are polyethylene and will melt when exposed to a
heat source.
- All four lights should be seen in the HUD and light up evenly.
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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- The lower two lights will be green when assembled correctly.
- By covering the four ends of the fibres in turn with your thumb, identify which pair of
fibres are the green ones.
- If you want the HUD to come in from the right, simply hold the HUD so the cable comes
in from the right and then identify which two fibres are providing light to the lowest two
(green) lights.
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- All four cables need to be inserted into the cable clamp (RB80_03), from left to right as
you look at this picture. There is a small notch on top of the cable clamp (see red arrow
below) and the green fibres need to be on either side of the notch (see green arrows
below).
- In the picture below the green fibres are the top two, on either side of the notch in the
clamp.
AP Diving Ltd. Head-Up Display (HUD) Dis/assembly Instructions
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- Slide the Cable Clamp (RB80_03), so there is an equal length of fibre on each side of
the clamp.
- In the lid there is a small raised section, seen here in the 9 o’clock position (see red
arrow below).
- As you insert the cable and cable clamp assembly, the notch of the cable clamp must
line up with the raised section.
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- To line it up, gently rotate the cable while aligning it, so you can feel for correct
alignment when the cable clamp slips onto the raised section within the lid.
- Once the cable is correctly pushed in and located correctly, keep it secured in its place
by keeping it pushed down.
- Now screw the locking clamp (RB80_07) back into place (clockwise).
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- Slide the cable collet (RB80_09) back in place, ensuring the chamfered side is going into
the chromed brass fitting.
- Tighten the locking clamp GENTLY with a 16mm spanner.
- Take care not to over-tighten!
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- Screw the cable ring (RB80_08) back into place (clockwise).
- Hold the HUD Locking clamp (RB80_07) in place with a 16mm spanner.
- Tighten the HUD cable ring (RB80_08) with a 14mm spanner (clockwise).
- Take care not to over-tighten!
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8. Testing Instructions
8.1 Test for proper operation
- Switch the Vision handset on by pressing and holding the left button for 1 second.
- Controller 1’s LEDs (one red and one green) should light up, followed by Controller 2’s
LEDs.
- Check if all 4 LEDs are clearly visible on the mouthpiece-end of the HUD.
- Check if all 4 LEDs are evenly lit on the mouthpiece-end of the HUD.
- TIP: in order to get the red LED’s to go on, simply keep the oxygen supply closed while
opening up the lid of the rebreather. This will force a “LOW OXYGEN” error and will
subsequently put the red LEDs on.
- Switch controller 1 and 2 off and on, to verify that their corresponding LEDs come on
and are in the correct left-right position on the mouthpiece-end of the HUD.
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