Cleaning; Mechanical And Electronic Components; Reflector Assembly And Ftashtube Lens; F-Stop Plate Exposure Dial Reassembly - Vivitar 283 Service Manual

Automatic Electronic Flash
Model
283
G. The exposure dial components (Figures 3-23 and 3-24) must be reassembled correctly. Take the cover-
plat e and hold it with the knurled edge facing you; the serrations on t he inner edge of the plate
sho uld be towards the bottom_ Pick up the ASA/foot age ind icator plate and hold it so that the num-
bers are right-side up. Now orient the ASA/footage plate so that the larger of t he two black tabs,
and the color wedges are at your left. In this position, the ASA/footage plate should fit right into the
rear - the side turned away from you - of the coverplate.
There are two notches on the rear of the coverplate that accommodate the two black tabs on the ASA/
footage plate. When these two plates are positioned correctly, the large tab on the ASA/footage plate
fits into the large notch on the coverplate and the small tab into the small notch. Pick up the f-stop
plate with the numbers right-side up, the arrow pointing to your right, and place it behind the assem-
bled coverplate and ASA/footage plate. The arrow must point directly away from the color wedges.
Next, insert the two pins on the rear of the f-stop plate int o the two holes of the reflector assembly.
The pins will fit properly into the holes only if the reflector assembly and the dial plates are properly
aligned. The flattened edge of t he f-stop plate must coincide with t he flattened edge of the reflector
assembly. This should place the serrated inner edge of the coverplate directly over these two flattened
edges. The serrations must click against the dial det ent once the d ial is installed in the body case.
Cover plate
\
Serrations
ASA/Footage Plate
Small
Tab
\
Large
Tab
/
F-Stop Plate
\
Flattened
Edges
Holes for Pins
Reflector
Assembly
I
Figure
3-23.
Coverplate, Exposure D ial Reassembly
Figure
3-24.
f-Stop Plate, Exposure Dial Reassembly
H. Make certain that after reinstalling the calculator dial parts and the exposure dial reflector assembly,
the dial clicks when it is rotated. If it does not, check to see that the dial detent is properly in place.
Figures 3-5 and 3-20.
I. Be sure to insert PC trigger board A into mounting slots in reflector case UA checking that the plastic
insulation affixed to the floor of the reflector case is properly positioned. Figures 3-3 and 3-7.
J. Replace plastic insulation between the reflector assembly and PC trigger board A. Figure 3-7.
K. When reassembling body case LB and reflector case UA, make certain that the wires from PC trigger
board A are not pinched. Fig. 3-3.
3.6
CLEANING
3.6.1 Mechanical and Electronic Components.
Wipe the large surfaces with a clean, lint-free cloth. Use low pres-
sure, compressed air to blow dust from hard-to-reach places.
3.6.2 Reflector Assembly and Flashtube Lens.
To clean the diffuser lens, immerse in warm, soapy water and wipe
gently with a clean piece of cotton. Rinse in cold water and BLOT dry (do not wipe) with a clean, lint-free
cloth or tissue. Do not allow the surface to air dry , which results in water marks. Avoid touching the reflec-
tor surface; use dry air or a lens brush to remove dust or lint.
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Vivitar 37460598 (11/80)
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