Keeler vantage+ User manual

2415 -P- 7011
Issue A 07/07/2008
Indirect Ophthalmoscope
Service Manual
ALWAYS READ THE INSTRUCTIONS
Keeler Limited, Clewer Hill Road, Windsor, Berks, United Kingdom. SL4 4AA.
Tel No. [phone] Fax No. [phone]

Vantage + Service Manual
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C ONTENTS
Introduction 1
Service Principles 1
Tools Required 2
Precautions 3
Disassembly 4
Remove the Optics Head from the Browbar 4
Remove the Front Cover 5
Remove the Optics Head and Illumination Assy. 6
Reassembly 8
Refit Illumination Assy and Viewing Assy 8
Refit to Browbar 10
Spare Parts List 13

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Introduction
This manual covers servicing of both the Bulb and LED illuminated versions.
The only difference lies in the Illumination Assy and the Dimmer PCB Assy
which are not interchangeable.
Damage may occur if an attempt is made to mix the Bulb and LED
Illumination Assy and Dimmer PCBs.
All drawings refer to the LED version with notes where appropriate for the bulb
version.
Service Principles
The Vantage + comprises a numbe r of modules which have been built and
aligned in the factory. These modules can not be reliably aligned without the
special jigs and should not therefore be disassembled further than described
in this manual. There is a strong possibility of the unit de veloping diplopia or
hyperphoria if the Viewing Optics are disassembled or adjusted.
Where a sub - assembly is quoted it cannot normally be reliably repaired
without special tools, adhesive and/or jigs.

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Tools Required
Most of the tools required will be in standard electro - mechanical toolkit.
The following special tools will make assembly and disassembly easier.
TD351 Lock Ring Key for Eyepieces.

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Precautions
Care should be taken to carry out any repair work on a clean soft surface to
minimise damage to th e outside of the unit.
Solvents should not be used for cleaning.

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Disassembly
Virtually all repairs inside the head unit except changing the Centre Mirror
involve removing both the Viewing Optics Assy and the Illumination Assy from
the Rear Cover. This i nvolves removing the whole Optics Assy from the
Browbar.
Remove the Optics Head from the Browbar
1. Unplug the power supply from the Dimmer Block.
2. Remove the Browbar from the Headband by undoing the knobs.
3. Remove 3 off No2 x PT screws (19) holding the Dimmer Block to the
Browbar.
4. Carefully unsolder the 2 wires from the PCB (31). It may be easier to
remove the PCB Assy from the Dimmer Housing (7).
4.1. Slide the Blue Indicator Pin (23) out of the Control Knob (6).
4.2. Slacken the A llen Screw holding the Knob to the Dimmer Control and
remove the Knob.
4.3. Undo the Nut on the Dimmer Control
4.4. Remove the Dimmer PCB Assy.
Note that these wires will need to be re - soldered after the repair is
completed and there is insufficient spare length to strip the wires again.
5. Undo the Hinge Clamp from the Hinge Pin and remove the Hinge Pin
taking care not to lose the Spacer or the 2 washers under the Hinge
Clamp.
6. The Optics Head can now be separated from the Browbar.
Figure 1

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Remove the Front Cover
1. Remove 2 of f Mirror Spindle Knob (25) by gently pulling.
2. Carefully lift 2 off Control Knob Label (21) with the point of a sharp blade.
They are self adhesive.
3. Remove 2 off M2 x 8 Csk PT Screws (32) from the centre of the 2 Control
Knobs.
4. Remove the 2 Control Knobs ( 17).
5. Turn the Optics Head over and slide the Eyepieces to the middle to reveal
2 off M2 x 8 Csk PT Screws (Figure 3 13). Remove these screws.
6. Remove 2 off M2 x 8 Csk PT Screws (Figure 3 13) from the top of the
unit above the Browbar Mount.
7. Lift the Front Cover off by carefully prising the sides by the filter controls
apart to allow the cover to slide over the filter controls.
8. Carefully remove the Light Shield (12).
9. Remove the Mirror Spindle (29).
Figure 2

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Remove the Optics Head and Illumination Assy.
1. Unscre w 2 off Eye Cap (3) being careful not to lose the +2D Eye Lenses
(2).
2. Unscrew 2 off Eyepiece Lock Ring using TD351 Lock Ring Key.
3. Remove 2 off P D Slider (18)
4. Turn the unit over
Figure 3

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5. The Viewing Assy (27) and Illumination Assy (28) are joined by the Centre
Spindle (24) and must be removed together.
6. Remove 2 off M2 x 8 Csk PT Screws (13) from the Viewing Assy (27).
7. Remove 4 off M2 x 8 Csk PT Screws (13) from the Illumination Assy (13)
8. Carefully lift the 2 assemblies together from the Rear Cover Moulding (17)
9. The 2 assemblies can now be separated.
Further disassembly of either the Illumination Assy or the Viewing Assy is not
advised as special tools and jigs are required to reassemble and align.
Figure 4

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Reassembly
Refit Illumination Assy and Viewing Assy
Great ca re must be taken to avoid any strain on the Eyepiece Mirror Mounts
as these have been carefully aligned on the laser jig during manufacture.
Avoid holding the Viewing Assy by the Mirror Mounts.
Refer to Figure 4
1. Stand the Viewing Assy on its base.
2. Locat e the Centre Spindle (24) in the base of the Viewing Assy so that the
peg on the moving Centre Mirror Assy engages with the slot on the Centre
Spindle
3. Locate the Illumination Assy onto the top end of the Centre Spindle so that
it engages with the Gratic ule Carrier. It will be necessary to rotate the
Graticule Wheel to the smallest aperture so that the link is sticking out.

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4. Lay the Viewing and Illumination Assemblies together as shown below
ensuring that the Centre Spindle remains engaged at bo th ends.
5. Carefully thread the cable from the Illumination Assy up through the Rear
Cover Moulding ensuring that the cable is not twisted.
6. Align the Browbar Mount with the slots on the Rear Cover Moulding and
carefully locate the Rear Cover Moulding ov er the Viewing and Illumination
Assemblies.
Refer to figure 3
7. Place 2 off P D Slider (18) over the Eyepieces
8. Carefully fit 2 off Eyepiece Locking Ring (21) using TD351 Lock Ring Key.
9. Fit 2 off +2D Eye Lens (2) into the Eyepieces.
10. Secure these in place with 2 off Eye Cap (3).
11. Turn the unit over onto the Browbar Mount.
12. Operate the Graticule Wheel and ensure that the Mirror Block on the
Viewing Assy moves to and fro. If not, return to 3 above removing the
items fitted to the Eyepieces first.
Refer to figure 4
13. Fit 2 off M2 x 8 Csk PT Screws (13) to retain the Viewing Assy.
14.Fit 4 off M2 x 8 Csk PT Screws (13) to retain the Illumination Assy.
Refer to figure 2
15. Refit the Mirror Spindle (29) under the Mirror, ensuring that the cam is to
the right of the Mirror and that it engages in the Rear Cover Moulding.
16. Rotate the Mirror Spindle to lift the Mirror to its Highest point.

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17. Carefully fit the Light Shield (12) over the 2 pins in the Viewing Assy
ensuring that it fits under the Mirror.
18. Carefully blow out any dust in th e unit.
19. Offer the Front Cover Assy over the main assembly ensuring that the Light
Shield (12) fits into the slots behind the window. It will be necessary to
gently spring the Front Cover to clear the Graticule and Filter Wheels.
20. Turn the unit over and sli de the Eyepieces together.
21. Fit 4 off M2 x 8 Csk PT Screws 2 on the Viewing Assy and 2 above the
Illumination Assy.
22.Fit 2 off Control Knob (17) to the Graticule / Filter Wheels using 2 off M2 x
8 Csk PT Screws. Hold the Control Knob whilst tightening the screws.
23. Fit 2 off self -adhesive Control Knob Label (21) to the Control Knobs.
24.Fit 2 off Spindle Knob (25) to the Mirror Spindle ensuring that the D
shaped hole mates with the D shape on the Spindle.
Refit to Browbar
1. Note the positions of the Washers a White PTFE washer (32 in Parts
List) should be placed under the head of the Hinge Pin (26) and under the
Black Plastic washer(9).
2. Thread the cable through the grommet in the Browbar
Figure 5

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Refer to figure 1
3. The cable must be a total of 135mm lon g including the stripped ends from
the Grommet in the Browbar. If a new cable has been fitted
3.1 Trim the cable to 135mm from the grommet.
3.2 Separate the 2 wires for 15mm from the free end
3.3 Strip the covering from the wires for 3mm and tin.
4. Feed the cable thro ugh the square slot in the Browbar.
5. Solder the wires carefully to the Dimmer PCB (31). Note the polarity of the
wires when reconnecting the LED version see below. Incorrect
connection may result in damage to the LED.
6. Fit the Dimmer PCB to the Dimmer Control Body (7) and tighten the nut
7. Fit the Dimmer Knob onto the shaft ensuring that the grub screw is
positioned over the flat on the shaft. Tighten the grub screw.
8. Lay the cable along the recess in the Dimmer Body (7) and hook the body
into the Browbar . Fit 3 off No2 x PT Screws (19)

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Spare Parts
Most of the parts are common to both the Bulb and LED versions. Parts not
listed are generally not available as spares.
Parts marked with * are only available as part of a spares kit ( 1202 -P- 7299) .
Current prices for spare parts are available from Technical Service.
Technical Service
Keeler Ltd
Clewer Hill Road
Windsor
Berks
SL4 4AA
Phone [phone]
Fax [phone]

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Spare Parts List
The following parts are common to both versions
Item Part No Description
1 E P79 - 11000 Browbar Grommet *
2 EP39 - 53721 +2D Eye Lens
3 EP39 - 53641 Eye Piece Cap
4 EP39 - 70189 Light Shield
5 EP39 - 70197 Control Knob *
6 EP79 - 09795 Knob Body
7 EP39 - 70178 Dimmer Control Body
11 EP39 - 70174 Metalised Label *
12 EP79 - 09621 Cap Pl ug
13 SP72 - 00001 M2 x 8 Csk PT Screw *
15 EP29 - 59777 Browbar
16 EP39 - 70191 Spindle Knob *
17 EP19 - 70005 Rear Cover Moulding
18 EP39 - 70190 P.D. Slider
19 SP70 - 25117 No2 x 3/8 PT Screw *
20 EP39 - 05121 P.D. Washer *
21 EP39 - 53991 Eyepiece Lockring
22 EP39 - 24664 Hinge Clamp
23 EP79 - 09808 Blue Indicator Pin
24 EP39 - 70209 Centre Spindle
25 EP39 - 70245 Hinge Spacer
26 EP39 - 24656 Hinge Pin
27 1202 -P- 5808 Viewing Optics
29 EP39 - 70215 Spindle
32 EP39 - 70247 P.T.F.E. Washer *
1202 -P- 7299 Fixings Kit

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The follow ing parts are specific to the Bulb version.
Item Part No Description
9 1202 -P- 7280 Front Cover Moulding (Bulb)
28 1202 -P- 5795 Illumination Optics (Bulb)
30 1012 -P- 5241 Vantage Plus Bulb
31 1202 -P- 6253 Dimmer PCB Assy (Bulb)
The following parts are specific to the LED version.
Item Part No Description
9 1202 -P- 7272 Front Cover Moulding (LED)
28 1205 -P- 5006 Illumination Optics (LED)
30 EP39 - 70332 Bulb Aperture Plug (LED) *
31 1205 -P- 5007 Dimmer PCB Assembly (LED)

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