Watchman FD-30A - Picture Quality Adjustments; Luminance and Focus Adjustment; Centering and Horizontal Alignment; Voltage and Circuit Adjustments

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a)

FD-30A

FD-30A

Luminance

Adjustment

1.

Bridge

the

pattern

according

to

the

mark

on

the

—

A

board

—

neck

of

the

CRT.

mark

2.

Connect

VTVM

across

R408

and

adjust

RV802

for

10

—

11

V

reading

on

VTVM.

—

MPX

board

—

Focus

Adjustment

1.

Set the

power

voltage

4.5

V.

2.

Tune

in

an

off-the-air

signal.

3.

Adjust

RV801

for

the

best

focus

at

the

center

of

the

picture.

4.8

V

Adjustment

Centering

Adjstment

.

Turn

the

socket

of

CRT

toward

the

north.

.

Tune

in

an

off-the-air

signal.

Adjust

RV601

so

that

the

collector

voltage

of

Q601

is

4.8

V.

—G

board

—

.

Adjust

the

centering

magnet

so

that

the

picture

is

in

the

center.

Horizontal

Alignment

Adjustment

1.

Loosen

the

adjustment

screw.

2.

Tune

in

an

off-the-air

signal

adjust

deflection

yoke

for

optimum

picture.

3.

Tighten

the

screw

after

the

adjustment.