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33

1) Turn the VCR on and take the tape out by pressing the

eject button.

2) Separate both top cover and plate top, and check both

the hole (A) of gear cam and the hole (A’) of chassis cor-
respond (Fig. C-2).

3) If it is done as in the paragraph 2): Turn the gear cam as

in No.2) after mantling the motor assembly L/D.

4) Undo the screw fixing the deck and the main frame, and

separate the deck assembly. Check both the hole (A) of
gear cam and the hole (A’) of chassis correspond (Fig.
C-1).

5) Check the mode S/W on the main P.C. board locates at

a proper position as in (B) of the Fig. (C-1).

6) Connect the deck to the main P.C. board and perform all

types of test. 

• Blank Tape (empty tape)

• Eject Mode

(with cassette withdrawn)

• Mechanism and Mode Switch

34

• Torque Gauge 

(600 g.cm ATG)

• Torque Gauge Adaptor
• Cassette Torque Meter 

SRK-VHT-303

• Play (FF) or Review

(REW) Mode

• Try to operate the VCR (VCP) per mode with the

tape not inserted (See ‘2. Prior Preparation for
Deck Adjustment).

• Measure after adhering and fixing the torque

gauge adaptor to the torque gauge (Fig. C-3-1)

• Read scale of the supply or take-up part of the

cassette torque meter (Fig. C-3-2).

1) Take the power cord from the consent.
2) Separate the top cover and the plate assembly top.
3) Insert the power cord into again.
4) Turn the VCR (VCP) on and load the cassette while push-

ing the lever stopper of the holder assembly CST back-
ward. In this case, clog both holes on the housing 
rail part of chassis to prevent detection of the end sensor.

If doing so, proceeding to the stop mode is done. In this
status, input signals of all modes can be received.
However, operation of the Rewind and the Review is
impossible since the take-up reel remains at stop status
and so cannot detect the reel pulse (however, possible for
several seconds).

(Preparation to load the VCR (VCP) with cassette tape not inserted)

Adhere the torque gauge adaptor to the torque gauge for measuring the value. 

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

Fast forward Torque

Rewind Torque

Play Take-Up Torque

Review Torque

Fast Forward

Rewind

Play

Review

Torque Gauge

Torque Gauge

VHT-303

VHT-303

Take-Up Reel

Supply Reel

Take-Up Reel

Supply Reel

More than 400g

°

cm 

More than 400g

°

cm

40~100g

°

cm

120~210g

°

cm

35

1) Travel the tape and check the bottom surface of the

tape travels along with the guide line of the lower drum.

2) If the tape travels toward the lower part of guide line on

the lower drum, turn the guide roller height adjusting
screw to the left

3) If it travels to the upper part, turn it to the right.
4) Adjust the height of the guide roller to ensure that the

tape is guided on the guide line of the lower drum at the
inlet/outlet of the drum.  (Fig. C-4-1)

• Post Height Adjusting

Driver

• Play or Review Mode

• The guide roller height adjusting screw on the 

supply guide roller and the take-up guide roller

1) Play the standard test tape after connecting the probe of

oscilloscope to the RF envelope output point and the
head switching output point.

2) Tracking control (playback) : Locate it at the center

(Set the RF output to the maximum value via the track-
ing control when such adjustment is completed after the
drum assembly is replaced.)

3) Height adjusting screw: Flatten the RF waveform.

(Fig. C-4-2)

4) Move the tracking control (playback) to the right/left.

(Fig. C-4-3)

5) Check the start and the end of the RF output reduction

width are constant.

There must exist no crumpling and folding of the tape due
to excess adjustment or insufficient adjustment. 

Flatten the waveform by
lightly turning the
guide roller height adjust-
ment screw.

When turning the tracking
control to both sides.

When the tracking control
locates at the center.

• Oscilloscope
• Standard test 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 the standard test

tape.

• Guide roller height

adjusting screw

36

1) Basically use the A/C head assembly adjusted as in

SPEC.

2) Check there is crumpling and folding of the tape around

the A/C head. If it is, Turn and adjust the tilt adjusting
screw to ensure that the tape corresponds to the bottom
guide of the P4, and recheck the tape path after pro-
ceeding play for 4-5 seconds. 

3) Where the tape bottom is not equal to Fig. C-5-3, Adjust

the height by using the height adjusting screw (B) and
then readjust it by using the tilt adjusting screw (C).

Always check the height of the A/C head since most ideal
height of A/C head can be obtained when the bottom part
of the tape is away 0.2 ~ 0.25mm from the bottom part of
the A/C head.

• Blank Tape

(Empty Tape)

• Driver (+) Type ø 5

• Play the blank tape

(empty tape).

• Tilt adjusting screw (C)
• Height adjusting screw (B)
• Azimuth adjusting screw (A)