Figure 4-17. Vacuum Pump Sound Attenuator, Removal and Installation
(3)Lift attenuator cover vertically and remove.
Disconnect electrical cords and place
within the attenuator box and lift box and remove.
Installation . Install the vacuum pump sound
attenuator as follows:
Place replacement attenuator box over
vacuum pump and cables.
Place electrical cords in slots in attenuator
Position replacement attenuator cover on
Connect hose to the vacuum pump.
Connect electrical cord and place the
CAMERA circuit breaker in main power service box to
Section XII. MAINTENANCE OF SAFELIGHT
4-28. General. A swivel mounted darkroom safelight is
installed on the right-hand wall just forward of the water
tank. The safelight includes several filters behind which
is installed a 15w lamp. The light is provided to supply
illumination of a color which will not affect the
photographic material during the processing period. The
light consists of a dome shaped casing which contains
the bulb and which is mounted in a swivel installed in
the shelter ceiling. The safelight power cord plugs into a
receptacle on the shelter wall and incorporates a two-
Inspection Inspect the safelight assembly as
Inspect safelight for security of mounting.
Secure as necessary. (See fig. 4-18.)