Orion DVD/VR-2961 - Page 31

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MECHANICAL

ADJUSTMENTS

2-2:

CONFIRMATION

AND

ADJUSTMENT

OF

AUDIO/

CONTROL

HEAD

When

the

Tape

Running

Mechanism

does

not

work

well,

adjust

the

following

items.

1.

Playback

the

VHS

Alignment

Tape

(JG001C

or

JGO01E).

(Refer

to

SERVICING

FIXTURE

AND

TOOLS)

2.

Confirm

that

the

reflected

picture

of

stamp

mark

is

appeared

on the

tape

prior

to

P4

Post

as

shown

in

Fig.

2-2-A.

a)

When

the

reflected

picture

is

distorted,

turn

the

screw

@

clockwise

until

the

distortion

is

disappeared.

b)

When

the

reflected

picture

is

not

distorted,

turn

the

screw

()

counterclockwise

until

little

distortion

is

appeared,

then

adjust

the

a).

3.

Turn

the

screw

@

to

set

the

audio

level

to

maximum.

4.

Confirm

that

the

bottom

of

the

Audio/

Control

Head

and

the

bottom

of

the

tape

is

shown

in

Fig.

2-2-C.

c)

When

the

height

is

not

correct,

turn

the

screw

@

to

adjust

the

height.

Then,

adjust

the

1~3

again.

Audio/Control

Head

Reflected

picture

of

Stamp

Mark

U

0.25+0.05mm

Fig.

2-2-C

D2-3

2-3:

TAPE

RUNNING

ADJUSTMENT

(X

VALUE

ADJUSTMENT)

1.

Confirm

and

adjust

the

height

of

the

Reel

Disk.

(Refer

to

item

1-1)

2.

Confirm

and

adjust

the

position

of

the

Tension

Post.

(Refer

to

item

1-2)

3.

Adjust

the

Guide

Roller.

(Refer

to

item

2-1)

4.

Confirm

and

adjust

the

Audio/Control

Head.

(Refer

to

item

2-2)

5.

Connect

CH-1

of

the

oscilloscope

to

TP102,

CH-2to

TP103

and

CH-3

to

pin

19

of

J8004.

6.

Playback

the

VHS

Alignment

Tape

(JG001U

or

JGQ01V).

(Refer

to

SERVICING

FIXTURE

AND

TOOLS)

7.

Set

the

X

Value

adjustment

driver

(UG153)

to

the

©

of

Fig.

2-2-B.

Adjust

X

value

so

that

the

envelope

waveform

output

becomes

maximum.

Check

if

the

relation

between

Audio

and

Envelope

waveform

becomes

(1)

or

(2)

Of

Fig.

2-3.

eae

ae

a

ee

ee

2-4:

CONFIRM

HI-FI

AUDIO

(Hi-Fi

model

only)

1.

Connect

CH-1

of

the

oscilloscope

to

TP103

and

CH-2

to

the

pin

19

of

J8004.

2.

Playback

the

VHS

Alignment

Tape

(JGO01R).

(Refer

to

SERVICING

FIXTURE

AND

TOOLS)

3.

Press

the

Tracking

Up

button

and

count

number

of

steps

which

the

audio

output

is

changed

from

Hi-Fi

(10KHz)

to

MONO

(6KHz).

4.

Press

the

Tracking

Down

button

and

count

number

of

steps

which

the

audio

output

is

changed

from

Hi-Fi

(10KHz)

to

MONO

(6KHz).

5.

If

the

difference

are

more

than

3

steps,

set

the

X

Value

adjustment

driver

(JG153)

to

@

of

Fig.

2-2-B.

Change

the

X

Value

and

adjust

it

so

that

the

value

becomes

within

2

steps.