Panasonic OmniVision PV-M1326, Service Manual, Page: 16 / 173

2-11
Twist counterclockwise
(clockwise as viewed
from the Bottom Side)
POSITION ADJUSTMENT OF TENSION
POST (PRELIMINARY)
Purpose :
To feed a constant tension to the tape so that the tape runs
with stability, by performing a preliminary adjustment.
Symptom of Misadjustment :
1) If the adjusted value is below the specification, the tape
tension is not sufficient, thus causing a tape slack to
occur.
2) If the adjusted value is above the specification, the tape
tension is too high, thus causing tape damage to occur.
*Equipment Required :
2mm Hex. Wrench .......................... (Purchase Locally)
1. Remove the Cassette Up Ass'y.
2. Place a jumper between TP6001 and GND.
3. Turn ON the Power Switch and press the Play Button to
complete the loading operation sequence.
4. As soon as loading is completed, insert the Hex.
Wrench(2mm) into the Tension Band Fastener and adjust it
(only counterclockwise) as indicated by the arrow so that the
outside edge of the Tension Post lines up with the outside
edge of Cut Washer on the P1 post. (See Fig. M7)
5. Remove the Hex. Wrench (2mm).
6. Press the Stop/Eject Button to complete the unloading
operation Sequence.
7. Remove the jumper between TP6001 and GND.
8. Reinstall the Cassette Up Ass'y and cabinet parts.
P1 Post
Tension Post
Outside edge of
the Tension Post
Nut
Line Up
Tension Band
Fastener
FE Head Unit
Outside edge
the Cut Washer
Fig. M7
Earth Plate Unit
Black Screw(A)
Center
1mm
Rotating
Direction
Rear Side
Note :
1. Reinstall the Cylinder Unit so that the 2 projections on the
Cylinder Base of chassis meet the 2 holes on the lower
surface of the Cylinder. Then while twisting the D.D.
Cylinder as shown in Fig. M5-2, fix it with 3 screws.
Correct Cylinder position is necessary for tape
transportation alignment.
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”.
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.
Fig. M6