Service manual

ManualsBrandsBall Electronic Display Division ManualsComputer equipmentTV-50

IMl035

4.

Low

voltage

bus

incorrect

(for

units

with

a low

voltage

supply)

AI,

A2

NOTE:

Low

voltage

supply

will

indicate

low

or

"0"

volts

if

an abnormal

load

is

evident

on

the

15

volt

line.

5.6

RASTER

SHIFTING

The

extra

cost

factory

option

of

inserting

Rl13

or

R1l5 makes

possible

a

fixed

raster

shift

either

down

or

up by

allowing

a

fixed

DC

current

to

flow

in

the

deflection

coil.

This

option

precludes

the

need

for

using

the

centering

rings

for

non-standard

centering

which would

result

in

disturbance

of

geometry and

focus.

1.

Raster

pull

down

(Refer

to

figure

5-1)

Add

Rl13 from

J102-4

to

ground

in

holes

provided.

Value

to

be

selected

for

desired

amount

of

pull

down.

2.

Raster

pull

up

(Refer

to

figure

5-1)

5-2

Replace

C106

with

a jumper

wire.

Remove

jumper

wire

from

J102-3

and

J102-1

and

replace

with

C107,

470uf,

10v,

electrolytic.

Add

Rl15 from

J102-3

to

ground

in

holes

provided.

Value

of

Rl15

to

be

selected

for

desired

amount

of

pull

up.