(a) It is important to disconnect any power source to the VR.
Make sure foreign objects are not dropped into the VR. If it is necessary
to remove the top cover of the VR, ensure that the screws are located and
secured in a safe place to be returned to their proper location. Once the
cover is removed, the operator visually inspects the VR for foreign objects.
(b) The most effective tools for cleaning heads are cotton swabs
and alcohol. The operator dips the swab into the alcohol and very gently
wipes the heads in a horizontal direction, back and forth across the heads.
This movement must only be done in the same path that the tape is
transported in order not to damage the heads. The video erase, audio, and
control track heads, and pole guides may be cleaned the same way.
b. After several hundred hours of use, the heads will tend to become
permanently magnetized. In performing maintenance, the operator would then
have to demagnetize the heads. The demagnetizer is operated by AC current
and puts out a magnetic field in order to demagnetize the heads.
The
operator turns the demagnetizer on and approaches the heads, places the
demagnetizer in close proximity to the heads, then draws very slowly away
before turning off the tool. All heads in the VR should be demagnetized as
well as guides.
Learning Event 2:
PERFORM OPERATOR'S MAINTENANCE OF CAMERA CABLES
1.
The camera cables are a major link between the recorder and the
camera. If the camera is damaged or parts are defective, the needed signal
will not travel to the recorder.
It is important to perform operator
maintenance on cables as on all of your equipment.
a. The operator must check the pins on the connectors to make sure they
are not loose. If the pins are loose, the operator must fix them by either
soldering and/or putting new pins on by crimping them in place.
b. The operator must inspect the cable itself to ensure that it does
not have a break in it or that the shield is not broken. If the cable has a
break, then the cable must be repaired by a qualified technician and not by
the operator. There are times when it may be cheaper to replace the cable
than repair it.
c. The cable should be free from dirt or grease.
Cables should be
wiped with a clean rag.
All this is done to prevent loss of valuable
equipment time.
Learning Event 3
PERFORM OPERATOR'S MAINTENANCE OF THE ZOOM LENS
1.
A zoom lens is one important part of the ENG/EFP equipment and it is
necessary to make sure it is always in good working order.
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