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37

1) Turn the Power S/W on and eject the Cassette by press-

ing the Eject Button.

2) Remove the Top Cover and Plate Assembly Top, visual-

ly check if the Gear Cam Hole is aligned with the
Chassis Hole as below Fig. C-2.

3) IF not, rotate the Shaft of the Loading Motor to either

clockwise or counterclockwise until the alignment  is as
below Fig. C-2.

4) Remove the Screw which fixes the Deck Mechanism and

Main Frame and confirm if the Gear Cam is aligned with
the Gear Drive as below Fig. C-1(A).

5) Confirm if the Mode S/W on the Main P.C.Board is

aligned as below Fig. C-1(B).

6) Remount the Deck Mechanism on the Main P.C.Board

and check each operation.

• Blank tape

• Eject Mode (with Cassette ejected)

• Mechanism and Mode Switch Position

Gear Cam (o) and Gear Drive (o) groove alignment

38

1) Unplug the power cord from the AC outlet.
2) Disassemble the Top Cover and Plate Assembly Top.
3) Plug the power cord into the AC outlet.
4) Turn the power S/W on and push the Lever Stopper of

the Holder Assembly CST to the back for loading the

cassette without tape.
Cover the holes of the End Sensors at the both sides of
the Chassis to prevent a light leak.
Then the Deck Mechanism drives to the Stop Mode.
In this case, the Deck Mechanism can accept inputs of
each mode, however the Rewind and Review operation
can not be performed for more than a few seconds
because the Take-up Reel Table is in the Stop State
and can not be detected the Reel Pulses.

The values are measured by using a Torque Gauge and
Torque Gauge Adaptor with the Torque Gauge affixed.

The torque reading to measure occurs when the tape
abruptly changes direction from Fast Forward to Rewind
Mode, when quick braking is applied to both Reels.

VIDE

O

CASS

ETTE

TORQ

UE

METE

R

VHT-3

03

S

R

K

-

V

H T

- S

SR

K - V H T - T

300

250

200

150

50

0

300

250

200

150

50

0

100

• Torque Gauge(600g/cm ATG)
• Torque Gauge Adaptor
• Cassette Torque Meter

SRK-VHT-303

• Perform each Deck Mechanism mode without

inserting a cassette tape(Refer to above No.2
Preparation for Adjustment).

• Read the measurement of the Take-up or Supply

Reels on the Cassette Torque Meter(Fig. C-3-2).

• Attach the Torque Gauge Adaptor to the Torque

Gauge and then read the value of it(Fig. C-3-1).

Fast Forward Torque

Rewind Torque

Play Take-Up Torque

Review Torque

Fast Forward

Rewind

Play

Review

Cassette Torque Gauge

Cassette Torque Gauge

Cassette Torque Meter

Cassette Torque Meter

Take-Up Reel

Supply Reel 

Take-Up Reel

Supply Reel

More than 400g/cm

More than 400g/cm

40~100g/cm

120~210g/cm

• Play (FF) or Review (REW) Mode

39

1) Confirm if the tape runs along the tape guide line of the

Lower Drum.

2) If the tape runs the bottom of the guide line, turn the

Guide Roller Height Adjustment Screw to clockwise
direction.

3) If it runs the top, turn to counterclockwise direction.
4) Adjust the height of the Guide Roller to be guided to the

guide line of the Lower Drum from the starting and end-
ing point of the Drum.

• Post Height Adjusting Driver

• Play or Review Mode

• Guide Roller Height Adjustment

screws on the Supply and Take-Up
Guide Rollers.

• Oscilloscope
• Alignment Tape
• Post Height Adjusting

Driver

• CH-1:PB RF Envelope
• CH-2:NTSC: SW 30Hz

PAL: SW 25Hz

• Head Switching Output

Point

• RF Envelope Output

Point

• Play an Alignment Tape

• Guide Roller Height

Adjustment Screws

1) Play an Alignment Tape after connecting the probe of the

Oscilloscope to the RF Envelope Output Test Point and
Head Switching Output Test Point.

2) Tracking Control(in PB Mode) : Center Position(When

this adjustment is performed after the Drum Assembly
has been replaced, set the Tracking Control so that the
RF Output is Maximum).

3) Height Adjustment Screw : Flatten the RF waveform. 

(Fig. C-4-2)

4) Turn(Move) the Tracking Control(in PB Mode) clockwise

and counterclockwise.(Fig. C-4-3)

5) Check that any drop of RF Output is uniform at the start

and end of the waveform.

If the adjustment is excessive or insufficient the tape will
jam or fold.

40

• Blank Tape
• Screw Driver(+) Type 5mm

• Play the blank tape 

• Tilt Adjustment Screw(C)
• Height Adjustment Screw(B)
• Azimuth Adjustment Screw(A)

1) Initially adjust the Base Assembly A/C Head as shown

Fig. C-5-1 by using the Height Adjustment Screw(B).

2) Play a blank tape and observe if the tape passes accu-

rately over the A/C Head without tape curling or folding.

3) If folding or curling is occured then adjust the Tilt

Adjustment Screw(C) while the tape is running to resem-
ble Fig. C-5-3.

4) Reconfirm the tape path after Playback about 4~5 sec-

onds.

Ideal A/C head height occurs when the tape runs between
0.2~0.25mm above the bottom edge of the A/C Head core.