Trio CS-2100A - MAINTENANCE; Case Removal and CRT Servicing; Troubleshooting Common Issues

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MAINTENANCE

REMOVAL

CASE

Pull

out CH3 and CH4

POSITION knobs.

Remove

the 4

screws located

at the

rear

of the

case

and

the

located

bottom with

a ©

screwdriver. Carefully

slide

the

body forward from

the

case.

install

the

body

in the

case, place

the

case horizon-

tally

and

slide

the

body into

the

case using

the

rails

located

at the

bottom

of the

case. Then, place

the

body

vertically

and

engage

the

case front edge into

the

front

panel groove.

Temporarily insert

the

case retaining screws

and

then

tighten them evenly.

5. Install

the CH3 and CH4

POSITION knobs.

-CAUTION:

A voltage

of 16kV is

applied

to the CRT

socket

and

anode

cap.

Before removing

the

case, turn

the

power

off

and

pull

out the

power plug. After removing

the

case,

take care

not to

touch them.

REMOVING/INSTALLING

CRT

When servicing CRT,

do not

loosen

the CRT

band. Only

remove

the CRT

retaining screws, then slide

the CRT

backward

and

raise

the

socket.

The CRT can be

remov-

ed easily.

Insert

the CRT

from

the

socket side until

the CRT

comes

in contact with

the

shield plate

and

tighten

the CRT

band retaining screws.

slots

are

provided

in the CRT

bracket,

the CRT can

be moved right

and

left,

and

back

and

force.

the

bracket

inclined

by 45°, the CRT can be

positioned

in an

arbitrary position.

To fix the CRT, fix

the

CRT

band, then

fix the

bracket.

i-CAUTION:

A high tension voltage

remained

at the

anode

of the

CRT. Before removing

the CRT,

connect

the

anode

the ground

via a 100 kil

load

for 5

seconds

discharge

the voltage.

TROUBLESHOOTING

Confirm that

the

voltage selector

is set to the

correct

position.

If one of the

mode LEDs does

not

light,

the

unit will

not

operate correctly. When using

the

unit, confirm that

the

LED lights

up.

service

the

unit effectively, isolate

the

failure first.

Then,

remove

the

case

and

check

the

wiring, P.C.B,

pattern

and

parts.

A low

voltage power supply will affect

the

circuitry.

not use the low

voltage power supply

for

checking.

8-1

Trio CS-2100A - MAINTENANCE; Case Removal and CRT Servicing; Troubleshooting Common Issues

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