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1) Refer to section 3-16 and remove the crescent slide.
2) Refer to section 3-14-2 and remove the S and T incline

mounting assemblies.

3) Remove the clamp 

1

, then remove the components:

the S load gear 

2

, the S load spring 

3

 and the S load

lever assembly 

4

. When you do this, be careful not to

damage the clamp 

1

, which can be damaged easily.

Again, be careful when you disassemble the compo-
nents, as the S load spring 

3

 will spring out.

4) Remove the following components: the T load gear 

5

,

the T load spring 

6

, and the T load lever assembly 

7

.

Be careful when you disassemble the components, as
the T load spring 

6

 will spring out.

1. Apply grease (SGL-505) to the shafts 

8

, 

9

 and parts A

shown in Fig. 3-17-1. Then apply grease (SGL-505) to
the parts shown in Fig. 3-17-2.

2. When fitting the S load gear 

2

 and the T load gear 

5

align them in the tape-loaded state, as shown in Fig. A in
Fig. 3-17-3. Again, after completing tape-unloading on
these gears, check that they are positioned as shown in
Fig. B in Fig. 3-17-3, then refer to section 3-14-2 and fit
the S and T incline mounting assemblies.

4

 S load lever

     assembly

6

 T load 

     spring

5

 T load 

     gear

Parts A
(apply
 grease here)

3

 S load spring

1

 Clamp

8

 Shaft

9

 Shaft

2

 S load 

     gear

7

 T load lever

     assembly

Fig. 3-17-1

Apply
grease here

Apply
grease 
here

Apply
grease here

Apply
grease here

Apply
grease inside
the hole

Apply grease inside 
the hole

Apply grease to the gears

(T side)

(S side)

Fig. 3-17-2

Fig. B: When tape unloading is complete

Fig. A: When tape loading is complete

T load gear

S load gear

T load gear

S load gear

 Fig. 3-17-3

1) Refer to section 3-2 and remove the mechanism unit.
2) Refer to section 3-3-1 and remove the cassette mecha-

nism assembly.

3) Remove the soldering from the MC-1 PWB assembly,

then remove the photo diodes 

1

, 

2

 and the LED 

3

.

When removing the photo diode 

2

 on the tape top

sensor side, refer to section 3-15 and remove the main
cam.

1. Fit the photo diodes 

1

 and 

2

 so that their photorecep-

tors to face the LED 

3

, as shown in Fig. 3-18-1. Align

the cuts in the LED 

3

 and the holder 

4

.

Push the photo diodes 

1

, 

2

 and the LED 

3

 as far

down as they will go, so that they do not protrude above
the top of their holders.

2. Do the soldering quickly.

Turn the photoreceptors to
face the LED 

3

1

 Photo

     diode
    (Tape end
     sensor)

3

 LED

4

 Holder

Holders

Front

Align the cuts

Holders

2

 Photo

     diode
    (Tape top
     sensor)

 Fig. 3-18-1

1) Refer to sections 3-12-2 and 3-12-4. then remove the

clutch mounting assembly, the T soft brake assembly
and the take up reel assembly.

2) Refer to section 3-13-2, then remove the wheel gear 2,

the wheel gear 1. and the brake control lever.

3) Remove the soldering from the MC-1 PWB assembly,

then remove the photo diode (reel sensor) 

1

.

1. When assembling the parts, align the cut on the photo

diode (reel sensor) 

1

 with the protrusion on the

mechanism chassis 

2

.

2. Do the soldering quickly.

Cut

1

 Photo diode

     (reel sensor)

Mounting shaft for
take up reel
assembly

2

 Protrusion

Fig. 3-18-2

1) Refer to section 3-3-1 and remove the cassette mecha-

nism assembly.

2) Remove the EP switch spring 

1

.

3) Remove the clamp 

2

, then remove the EP switch lever

3

.

1. Apply grease (SGL-505) to the protrusion 

4

 on the

back of the EP switch lever 

3

.

2. After fitting the cassette mechanism assembly. check

that in EJECT mode. the EP switch lever 

3

 does not

touch the EP switch 

5

 .

1

 EP switch spring

3

 EP switch lever

2

 Clamp

5

 EP switch

4

 Protrusion on

     back
     (apply grease here)

 Fig. 3-18-3

1) With the power switch turned OFF, stick black vinyl tape

over the photo diodes of the tape sensors. Then turn
the power switch ON. Front loading will begin. Refer to
section 3-2 and Fig. 3-2-2. and release the locks of the
tray lock lever and the lid opener lever.

1. The measurements must be taken without any incan-
descent light or daylight.
2. If the mechanism cannot be put into PLAY, FF or REW
mode by the method described in 1) above, make a
dummy cassette tape, as shown in Fig. 4-1-2. The dummy
cassette tape is made as follows: Unscrew the five screws
on the underside, remove the reels, leaf springs and other
parts on the supply and take up sides, make holes in the
upper surface as wide as the reel diameter, then assemble
the parts.
2) Put the mechanism into REW mode, wait at least 10 sec-

onds, then measure the torque value of the reel table on
the supply side. It should be at least 600 g/cm. Take the
measurement with the torque dial gauge (H-7099-039-H/
H-7099-035-H) held in position in your hand (lock torque).
While taking the measurement, rotate the reel table (take
up reel assembly) on the take up side with your hand so
that the reel sensor does not respond.

3) After switching to FF mode, wait for at least 10 seconds

and then measure the torque value of the reel table on
the take up side. It should be at least 600g/cm (lock
torque).

4) After switching to PLAY mode, wait for at least 10

seconds and then measure the torque value of the reel
table on the take up side. It should be between 80 and
140g/cm (lock torque).

Torque dial gauge
(H-7099-039-H)
(H-7099-035-H)

Reel table on
supply side

Reel table on
take up side

Fig. 4-1-1

Stick black vinyl
tape over the tape
sensor holes.

Dummy cassette
tape

Make holes with
roughly the same
diameter as the reel.

Fig. 4-1-2

1) Without loading a cassette tape, put the mechanism into

PLAY mode (turn the power switch OFF).

2) Adjust point 

A

 on the band brake assembly by rotating

it so that the tip of the BT lever assembly is aligned with
the line on the left side of the mechanism chassis.

3) Refer to section 4-2-2 and check that the back tension

torque is between 30 and 50g/cm.

Align the end of the BT lever
assembly with this line.

BT lever assembly

Tension
pole

Point 

A

Fig. 4-2-1

1) Mount the cassette torque meter (VHT-063S) and

switch to PLAY mode.

2) Check that the back tension torque is between 30 and

50g/cm .

In normal circumstances, the tape path system does not
need to be adjusted. However, after removing or replacing
one of the parts shown in Fig. 4-3-1, you should check and
adjust the tape path. The adjustment of the tape path is
carried out while monitoring the envelope waveform of the
video head output, using an oscilloscope. To make sure
that the tape drawn off the reel runs freely and without
excessive tension along all the tape guides and cylinders
(drums), it is also important to check each tape guide by
eye.

S reel

T reel

T guide roller

S guide roller

Audio R/P head assembly
(ACE head) Capstan shaft

Loading guide

T tape
guide

Pinch roller

Cylinder
(Drum)

Full erase
head

S tape
guide

BT post

0 tape guide

Fig. 4-3-1

1. Select a PAL or NTSC alignment tape or blank cassette

tape, according to the transmission system of the VCR
you are repairing.

NTSC: For models with 525 scanning lines and a field

frequency of 60Hz

PAL:

For models with 625 scanning lnes and a field
frequency of 50Hz

2. Clean the tape guides, the cylinder(drum), the capstan

Shaft, the audio R/P head (ACE head) and the full
erase head.

3. Using an oscilloscope, adjust the height of the guide

roller and carry out horizontal position adjustment,
height adjustment and azimuth adjustment on the audio
R/P head (ACE head). When observing the envelope
waveform, bring the CH-1 probe into contact with the
envelope waveform test point, and bring the CH-2 probe
into contact with the switching pulse (SW P) test point.
While adjusting the tape path, set the trigger at the low
side of the switching pulse (SW P) in order to observe
the output waveform on the CH-1 side of the video
head.

NOTE:The contact point for the oscilloscope varies from
one model to another, so to find the correct point for your
model, refer to the figure entitled “Test point for tape path
adjustment” in the electrical circuit section of the service
manual.
4. When checking the tape path by eye, use a dental

mirror.

1. Refer to sections 3-9-2, and remove the opener

mountIng .

2. Position the height adjustment tool (J-6090-055-A) 

3

under the full surface of the protrusion 

2

 on the load

lever assembly 

1

, as shown in Fig. 4-3-2.

3. Using your firlgers, gently screw the adjustment nut 

4

clockwise into the nut box (J-6082-045-A) 

5

 until the

protrusion 

2

 of the load lever assembly 

1

 touches the

height adjustment tool (J-6090-055-A) 

3

 and the screw

starts to feel tight. Next, loosen the adjustment nut 

4

by 270

°

 anticlockwise.

4. Load a cassette tape (NTSC: T-160, PAL: E-240) and

switch to PLAY mode. Check that when you do this, no
scratches appear on the upper or lower edges of the
tape. If scratches do appear, re-adjust the height.

Arrange the equipment so that the whole surface of the 
projection on the load lever assembly is positioned over 
the height adjustment tool (J-6090-055-A) when seen from 
directly overhead.

5

 Nut box

     (J-6082-045-A)

3

 Height adjustment

     tool (J-6090-055-A)

1

 Load lever

     assembly

2

 Protrusion

4

 Adjustment nut

Fig. 4-3-2