Panasonic Omnivision PV-4651, Service Manual, Page: 57 / 205

Fig. M5-2
2. Hold the Cylinder with extreme care so as not to touch the Heads or the tape path
on the Cylinder. If any of these parts are touched, clean them with a deerskin swab
(Head Cleaning Stick) saturated with Ethanol.
3. Upon completion of the replacement procedure, be sure that the Cylinder Unit
works. If any further maintenance is required, perform "TAPE
INTERCHANGEABILITY" with the alignment tape (VFMS0001H6).
4. Adjustment of the Earth Plate Unit is required after installation.
Refer to "CONFIRMATION OF EARTH PLATE UNIT INSTALLATION POSITION".
4.1.3.3. CONFIRMATION OF EARTH PLATE UNIT INSTALLATION
POSITION
Purpose :
To optimize the position of the Earth Plate Unit.
Symptom of Misadjustment :
May cause Cylinder rotating buzz.
Remove the Mechanism Unit. Place it upside down. Check to see if the Earth Plate
Unit is properly set in a position just less than 1mm (but not more than 1mm), as
measured from the center of the plate to the center of the Cylinder Shaft as shown in
Fig. M6. If required, adjust the Earth Plate Unit position by loosening Black Screw (A).
Note:
Never install the Earth Plate Unit in the opposite position (on the left side of the
center of the Cylinder Shaft), but always within a maximum of 1mm to the right side
of the center of this shaft.
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