DOWNLOAD Sony JMECHA Service Manual ↓ Size: 1.29 MB | Pages: 41 in PDF or view online for FREE

— 17 —

When the TG1 assy or S-reel table is replaced, or when a part
constituting these parts is replaced, perform the following
adjustment.

• TG1 FWD Position Adjustment
• FWD Back-tension Adjustment (Refer to section 3-7.)
• Reel table (RVS) torque check  (Refer to section 3-8.)

1)

Establish the [RP] mode.

2)

Install the TG1 adjustment jig (Ref. No. J-7) as specified by
the S/T position setting.

Be careful not to damage the flexible wiring board.

3)

Attach the torque screwdriver (Ref. No. J-11) and the TG1 FWD
adjustment screwdriver (Ref. No. J-8) to the adjustment screw
block.

4)

While rotating the adjustment screwdriver a little, press it down
lightly so that it is aligned with the gear of the (FWD)
adjustment plate.

5)

Loosen the adjustment screw that is tentatively tightened by
the torque screwdriver.  Perform adjustment so that TG1 comes
to the center of the gauge’s groove when viewed from directly
above the TG1 adjustment jig (Ref. No. J-7).  Then tighten the
adjustment screw.
Tightening torque: 0.0588 N•m (0.6 kg•cm).

6)

Check again that the TG1 position remains in the correct
position, then remove the jig.

A

— 18 —

1)

Install the Mini DV torque cassette (Ref. No. J-6).

2)

Set the [RP] mode.  Confirm that the torque reading of the
supply side is in the range of 0.45 to 0.55 mN•m (4.5 to 5.6
g•cm) including fluctuation.  If the torque reading is outside
the specified range, perform the following adjustment.

• If the torque reading value is higher than the specification:

(Reduce the spring tension as follows.)
Shift the hook position of the tension coil spring in the direction
of A.

• If the torque reading value is lower than the specification:

(Increase the spring tension as follows.)
Shift the hook position of the tension coil spring in the direction
of B.

1)

Install the Mini DV torque cassette (Ref. No. J-6).

2)

Set the FWD mode.  Confirm that the center of the T-reel table
torque reading value is 0.54 to 1.32 (mN•m) (5.5 to 13.5 g•cm)
and the fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0
g•cm).

1)

Install the Mini DV torque cassette (Ref. No. J-6).

2)

Set the RVS mode (by using the EDIT SEARCH (–) button of
the machine).  Confirm that the center of the S-reel table torque
reading value is 1.37 to 2.11 (mN•m) (14 to 21.5 g•cm) and the
fluctuation value is 0.39 to 0.40 (mN•m) (3.9 to 4.0 g•cm).

If either of the above specifications is not satisfied, check whether
the tension regulator band has any abnormality.  If it has no
abnormality, replace the corresponding reel table.

A

B

1)

Remove the drum referring to section 3-1.  Install the dummy
drum (Ref. No. J-9).

2)

Install the TG36 gauge (Ref. No. J-10) on top of the dummy
drum.  Rotate the slant adjustment zenith screw until the TG3
guide and TG36 gauge (Ref. No. J-10) become parallel.

3)

Remove all the jigs.  Attach the original drum back in its original
position referring to section 3-1.

4)

Clean the TG3 and TG4 guides referring to section 2-2.

5)

Perform the tape path adjustment.  (Refer to section 4, “Tape
Path Adjustment”.)

— 19 —

1)

Remove the drum referring to section 3-1.  Install the dummy
drum (Ref. No. J-9).

2)

Install the TG36 gauge (Ref. No. J-10) on top of the dummy
drum.  Adjust the slant of the TG6 guide.

3)

Rotate the slant adjustment zenith screw until the TG6 guide
and TG36 gauge (Ref. No. J-10) become parallel.

4)

Remove all the jigs.  Attach the original drum back in its original
position referring to section 3-1.

5)

Clean the TG5 and TG6 guides referring to section 2-2.

6)

Perform tape path adjustment.  (Refer to section 4, “Tape Path
Adjustment”.)

1)

Loosen the LS cam fixing screw (M1.4 

×

 4) 1 by 180 degrees.

2)

Establish the [STOP] mode.

3)

While pressing down the center of the LS chassis block assy
with force of 100 to 200 gf (0.98 to 1.96 N), move the LS cam
plate toward the S-reel side and tighten the LS cam plate fixing
screw (M1.4 

×

 4) 1 with force of 500 to 1000 gf (4.9 to 9.8

N).
Tightening torque: 0.059 to 0.01 N•m (0.6 kg•cm).

— 20 —

1)

Confirm that the brake-T block assy has been moved in the
counter-clockwise direction C.  While pressing the TG7 block
in the direction of the arrow D, insert the LS guide shafts T1
and T2 of the LS chassis block assy into the slots of the
mechanism chassis with slanted angle.

2)

While inserting the LS arm dowel into the LS cam plate groove,
insert the LS guide shafts S1 and S2 into the slots of the LS
chassis block assy as shown.

3)

Insert the LS guide retainer from the top, align it with the LS
guide shafts S1 and S2 and fix it with the screw (M1.4 

×

 2) 1.

Tightening torque: 0.059 to 0.01 N•m (0.6 kg•cm).

4)

Confirm that the LS guide retainer has play, is not lifted up, is
not installed in opposite direction and has not been deformed.

5)

Attach the E-type stop ring 1.5 3 into the LS guide shaft T1.

6)

Insert the FPC holder into DC motor (capstan) in the direction
of the arrow E and fix it with the screw (M1.4 

×

 2.5) 2.

7)

Connect the flexible wiring board coming from the FP-100
flexible wiring board into the FPC connector.

3

1

×

2

×

A

C

B

D

E

1)

Remove the FP-100 flexible wiring board from the FPC
connector on the FP-102 flexible wiring board.

2)

Remove the screw (M1.4 

×

 2.5) 2.  Remove the FPC holder

from DC motor (capstan).

3)

Remove the two screws (M1.4 

×

 2) 1.

4)

Remove the LS retainer in the direction of the arrow A on the
top.

5)

Remove the E-type stop ring 1.5 3.

6)

Remove the LS chassis block assy in the direction of the arrow
B

.