User Guide
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10.0 Maintenance
The Phase One 645DF+ generally needs very little maintenance. But
this is a professional tool and should be treated with care and caution.
Always do test shots before a photographic session if the camera for
any reason has not been used for a long period of time.
A frequently used product should be inspected periodically at the
nearest ofcial Phase One repair center. Do NOT try to repair any
camera, lens or back errors or malfunctions – Please consult your local
dealer.
10.1 Changing the Focusing Screen
1. Remove the lens.
2. Pull the Focusing Screen Release lever A forward, as illustrated, with
tweezers to ease the Focusing Screen down.
3. Remove the Focusing Screen from the Focusing Screen Frame by
grasping the tab on the edge of the screen with tweezers as illustrated.
4. When installing the screen, pinch the tab of the screen with tweezers,
and place the screen on the screen frame.
5. Push the screen frame up using the tweezers until hearing a clicking
sound. The screen is now properly installed. Never press down on other
parts as this will affect the focus function.
NOTE
Since the Focusing Screen’s surfaces
are soft and easily damaged, handle
them carefully.
Never touch the surface with bare
ngers. Should dust settle on it, merely
blow away by using a blower.
If the Focusing Screen needs cleaning,
send it to the nearest authorized Phase
One service center.
Do not attempt to clean the surface
of the Focusing Screen, as it is very
delicate.
Do not touch and damage the mirror in
any way.
A