Panasonic OmniVision PV-M1347, Service Manual

Page: 39 / 143

2-21
REEL TABLE HEIGHT ADJUSTMENT
Purpose:
To align the height of Supply and Take-Up Reel Tables
properly.
Symptom of Misadjustment:
If the height of the Reel Table is not properly aligned, the
tape will eventually be damaged.
Equipment Required:
Post Adjustment Plate ............................ (VFKS0010)
Reel Table Height Fixture ....................... (VFKS0009)
Specification ................................................. 0 +/- 0.2mm
1. Remove the Cassette Up Ass'y.
2. Position the Post Adjustment Plate over the reels.
3. Place the reel table height fixture on the Post Adjustment
Plate so that the foot of the fixture sits in the cutout portion
of the Post Adjustment Plate. Then zero the fixture.
Fig. M4-1
4. Measure to the top edge of each reel table. The height
should be 0 +/- 0.2 mm. If the height is not within the
specification, add or remove Reel Washers (under the reel
table) as necessary.
Fig. M4-2
Note:
Reel Washers are available in one size (0.25 mm) only.
FG HEAD GAP ADJUSTMENT
Purpose:
To properly pick up the FG Signal.
Symptom of Misadjustment:
If the FG Signal is not properly picked up, Servo Operation
cannot be achieved.
Equipment Required:
Oscilloscope
Specification .............................................. 0.13 +/- 0.02mm
1. Remove the VCR Chassis Unit and then place it upside
down.
2. Remove the Main C.B.A.
3. Slightly loosen Black Screw (A). Then set the Screwdriver
(#1 or #2 Phillips Driver) into the Hole (A). Turn the
screwdriver counterclockwise until the FG Head touches
the rotor. Then turn it slightly clockwise to the clearance as
specified.
4. Tighten Black Screw (A).
5. Reinstall the Main C.B.A.
Fig. M5
Note:
Do not touch the outside circumference of the rotor surface
with any tool and keep magnetic material away
from the rotor magnet (especially metal particles).
Confirmation of Signal Level
1) Supply a Video Signal to the Video Input Jack.
2) Insert a cassette tape and place the unit in SLP recording
mode.
3) Connect the oscilloscope to Pin 7 of P2502 on the Capstan
Stator Unit.
Confirm that the signal level is greater than 10mVp-p.
VFKS0009
VFKS0010
VFKS0009
VFKS0010
Reel Table
Hole (A)
FG Head
Capstan Belt
Capstan Rotor
Unit
0.13 +/- 0.02mm
Screwdriver
Black
Screw (A)