Barco RetroData 808s User manual

Brand: Barco

Model: RetroData 808s

Type: User manual

Barco RetroData 808s: Your Gateway to Exceptional Projection Performance

This user-friendly projector offers remarkable versatility with its ability to project up to three images simultaneously, making it ideal for multi-image presentations, conferences, and educational settings. Its high-resolution capabilities ensure crystal-clear visuals, while the advanced lens system delivers sharp images even in large venues. The 808s also boasts a range of connectivity options, enabling seamless integration with various sources, including computers, DVD players, and cameras.

Barco RetroData 808s: Your Gateway to Exceptional Projection Performance

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

Replacement of a picture tube

WARNING: CRT HANDLING

The picture tube encloses a high vacuum and care must be taken not to bump or to scratch

the picture tube as this may cause the tube to implode resulting in personal injury and

property damage. Shatterproof goggles must always be worn by individuals while

handling the CRT or installing it in the projector. Do not handle the CRT by the neck.

I. Removing and disassembling the defective picture tube.

1. Removing top cover of the projector

- Turn the lock screw with a

screwdriver or a coin a half

turn counter clockwise.

- Lift up the top cover and

carefully pivot it vertically

(attention: no cover support

provided).

- Carefully push the top cover

downwards (to eliminate lock

spring) and to the left (when

standing behind the projector)

to pull out the hinge-knuckle

of both lift-off hinges.

- remove the top cover.

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

2. Removing the picture tube cover

picture tube cover

[A]

[C]

[B]

[D]

- Remove the 2 retaining screws [A] on both

sides of the projector holding picture tube

cover on main frame.

- Loosen the 4 retaining screws [B] holding

picture tube cover on main frame.

- Loosen the 2 lock screws [C] locking the

picture tube cover on main frame.

- Rotate the picture tube cover towards the

front of the projector and loosen the 2

retaining screws [D].

- Slide the picture tube cover assembly back-

wards until the head of the retaining screws [B]

and [D] match the free gap.

- Pull the assembly out of the main frame.

Picture tube cover assembly removed

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

3. Picture tube removal (example GREEN picture tube)

A. Electrical disconnection of the defective

picture tube

EHT lead disconnection

Pull out the EHT lead of the defective picture

tube from the EHT splitter.

Deflection and Magnetic coils disconnection

Pull out the deflection connector J24 and Magnetic coils connector J535 of the G defective picture tube

from main frame.

CRT ground (A) and Unit ground (B) lead

disconnection

Disconnect the plug connection in both ground

wires.

CRT module removal

Disconnect the socket of the defective picture tube by

pulling back the CRT socket off of the end of the CRT.

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

B. Mechanical disconnection of the defective picture tube

Disconnection of the CRT from its

support

Remove the 2 bolts, holding the top side of

the picture tube to the support.

Removing the picture Tube

Move the end of the picture tube a little

downwards and clips the front of the picture

tube out of the picture tube lock springs.

Take out picture tube from main frame.

picture tube

lock springs

bolts

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

Disassembling the CRT unit

- Loosen the gear clamp of the stigmator magnets unit and slide the unit off of the end of the CRT.

- Loosen the gear clamp on the Deflection unit and on the Dynamic Astigmatism unit and slide both units

together off of the end of the CRT.

gear clamp of the stigmator magnets

gear clamp on the Dynamic Astigmatism unit

gear clamp on the Deflection unit

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

II. Placement of the new picture tube

1. Assembling the picture tube unit

8mm

3cm

connection on top

HV Lead reference for lining up

the neck components

Assembling

- Slide the Deflection and the Dynamic Astigma-

tism unit together over the neck of the picture

tube, Deflection unit fully to the end and the

Dyn. Astigmatism unit approx. 8mm from the

Deflection block.

- Tighten slightly the gear clamp of both units

(rotation must be possible for correct adjustment

of the units)

- Slide the stigmator magnets unit over the neck of the

picture tube for about 3cm. Tighten the gear clamp.

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

2. Mounting the picture tube unit in the main frame

bolts

Proceed now to the electrical connections and the cover placements (see pages 1 to 3)

Move the socket side of the picture tube below its

output amplifier and place the front of the tube on

the lock springs, lining up the two clearance holes

in the metallic tube support with the threaded

holes in the tube frame.

Push on the top of the tube to lock the tube

between the springs.

Using the two removed bolts, securely tighten the

picture tube into place..

lock spring

foam rubber

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

III. Picture tube alignment

Before starting the alignment of the new picture tube, the projector must warm up for at least 15

minutes at a medium brightness and contrast.

1 or 2 picture

tubes replaced

projected picture of the

non-defective tube can be

used as reference

rotate the deflection yoke

until the Horizontal mid-line

is levelled - tighten the

gear clamp

apply an external crosshatch

pattern at 15 kHz or use the internal

crosshatch

Picture tube alignment

proceed to a quick optical

and electrical focus

all picture tubes

replaced

apply an external crosshatch

pattern at 15 kHz or use the internal

crosshatch

rotate the deflection yoke

until the Horizontal mid-line

is levelled - tighten the

gear clamp

centre the picture on the

CRT faceplate (refer to

installation manual)

note: alignment of the

stigmators will change

again its position, if so,

realign raster centring

proceed to the following

adjustments for each picture

tube separately

Set the midpoint focusing

on 57 (see owner's manual)

and the Contrast on 80

move the focus unit slowly

for- or backwards for max

focusing in the middle of the

screen - tighten the gear

clamp and the centring

clamp

Date : 23/04/98

Replacement of a picture tube

DATA

808S

R9002031(7)

R9002032(8)

a<b

c<d

a' b'

a'=b'

c'=d'

realign the electrical

and optical focus

due tu mutual influence between the

stigmators, focus and centring, it is

advised to repeat above a couple of

times

re-position the raster

as described earlier

adjust the 4-pole rings until the

defocued dots are circular.

decrease the Contrast and

Increae the Brightness to

reveal the background raster

see service sheet 'Deflec-

tion switching/Hor Amplitude'

in this manual for the

alignment of the image width

coils

Note: when only one tube has

been replaced, the image width

of one of the other tubes as a

reference, and obviously limit

the adjustment to the core of the

corresponding replaced tube

scan width

adjustment

2-pole

4-pole

neutral

position

Set the midpoint focusing

on 100

select a source that

generate a field of small

dots and crosshairs

realign the electrical and

optical focus

adjust the 2-pole magnets rings by

rotating one or both up to a point

where 'shading' of both sides of

the vertical and horizontal lines is

equal.

lower the Brightness and

put the Contrast on its max

with the RCU

Set the midpoint focusing

on 0

Barco RetroData 808s User manual

Brand: Barco

Model: RetroData 808s

Type: User manual

Barco RetroData 808s: Your Gateway to Exceptional Projection Performance

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Barco RetroData 808s User manual

Barco RetroData 808s User manual

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