Panasonic OmniVision PV-M1326 Service Manual Download

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2-17

2-18

Screw (B)

Hole (C)

FG Head

Capstan Belt

Capstan Rotor
Unit

0.13 ± 0.02mm

Screwdriver

Black Screw (A)

Fig. M17-3

5. When P2 and P3 are adjusted properly, there is no

Envelope Drop at the beginning or end of the track as
shown in Fig. M17-4.

Fig. M17-4

6. Remove a jumper between TP6003 and +5V(TP6020).

Note:

Upon completion of the adjustment of P2 and P3, confirm
the Horizontal Position of the A/C Head by pushing the
Tracking Control Up or Down Buttons alternately, using
the Infrared Remote Control Unit, to check the symmetry
of the envelope. If required, perform “HORIZONTAL
POSITION ADJUSTMENT OF A/C HEAD,” Page 2-16.

ADJUSTMENT OF FG HEAD GAP

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 VCR Main C.B.A..
3. Slightly loosen Black Screw (A) and Screw (B). Then set the

Screwdriver (#1 or #2 Phillips Driver) into the Hole (C)
shown in Fig. M18. 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) and Screw (B) shown in Fig. M18.
5. Reinstall the VCR Main C.B.A.Fig. M18

Dropping envelope level at
the end of track (P3)

Envelope Is Adjusted Properly
(No Envelope Drop)

Fig. M18

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)

1) Supply a Video Signal to the Video Input Jack on the rear

side of the deck.

2) Insert a cassette tape and place the unit in SLP recording

mode.

3) Connect the oscilloscope to Pin 15 of P2502 on the Capstan

Motor Drive C.B.A..
Confirm that the signal level is greater than 10mVp-p.

REPLACEMENT OF CAPSTAN ROTOR
OR STATOR UNIT

1. Remove the Capstan Belt (Fig. M18).
2. In the order described in the Disassembly and Assembly

Procedures of Mechanism section, remove the Motor Block
Ass'y.

3. Carefully pull out the Capstan Rotor Unit. Be careful not to

lose the 2 Oil Seals shown in Fig. M19.

P2502

Bottom View

Screws (E)

Capstan Stator Unit

Capstan Motor
Drive C.B.A.

Thrust Adjust Screw

Oil Seals

Coil

CAPSTAN STATOR

CAPSTAN ROTOR

Magnet

Screw (D)

Capstan
Stator Unit

Screw (D)

Screw (B)

Screw (D)

Black
Screw (A)

Caution Note :

1) The replacement Capstan Rotor Unit is available only

as a complete unit with a spring loaded Capstan
Pulley.

2) Hold the new Capstan Rotor Unit firmly when installing

it, so the rotor will not be pulled toward the stator too
quickly (due to magnetic force). Placing some paper
on the coils before rotor installation may prevent
accidental damage to the coils if the above caution is
not observed.

3) During installation, do not touch the Capstan Shaft

with any hard material like drivers or tweezers.

9. Re-install the Capstan Motor Drive C.B.A. by tightening 2

Screws (E). Then carefully solder P2502 and re-install the
Motor Block Ass’y.

ADJUSTMENT OF THRUST ADJUST SCREW
AND OIL SEALS

10. Re-install the Capstan Belt and, while exerting pressure

to turn the Clutch Unit, tighten the Thrust Adjust Screw
slowly until the Capstan Rotor just starts turning.

11. At the point where the Capstan Rotor starts turning,

tighten the Thrust Adjust Screw another 180

clockwise.

12. Upon completion of the above procedure, confirm that the

Oil Seals are positioned as shown in Fig. M21 and make
sure that the oil seal does not contact the Pressure
Roller or P5 Arm Unit. Then, wipe off the Capstan
Shaft to remove oil, grease, and dust.

Note :

Clean the Capstan Post whenever an Oil Seal is
moved.

Fig. M21

Fig. M19

Fig. M20.

4. Carefully unsolder P2502 on the Capstan Motor Drive

C.B.A.. Then remove the Capstan Motor Drive C.B.A.
by removing 2 Screws (E) shown in Fig. M20.

5. Remove 3 Screws (D), Black Screw (A) and Screw (B).

Then lift out the Capstan Stator Unit.

6. Install the new Capstan Stator Unit and then tighten 3

Screws (D), Black Screw (A) and Screw (B).

7. Before installing the new Capstan Rotor Unit, loosen the