LEITZ PRADOVIT-N User manual

INSTRUCTIONS
pradovit-f
pradovit-n
I 31 - 26 b/Engl. I

This Booklet tells you everything you have to
know about your pradovit. The few controls
are really easy to use, and soon become
almost second nature. But first do take the
trouble to read this instruction booklet. To get
the most out of your slide show, you must
operate your pradovit correctly.
Setting up
Removing cover
Mains lead and remote control
Connecting to the mains supply
Connecting the remote control cable
Page3
4
4
4
Operation
Switching on and off
Remote control for moving the magazine
backward + forward at will
Operating the slide changer of the
projector
Inserting and changing the magazine
Re-arranging slides during projection
Focusing
Levelling
Manuel operation of the slide changer
5
6
6
7
7
8
8
9
Maintenance
Opening the lamp house 10
Taking off the side-panel 11
Inserting + changing the projection-lornp 11
Centring the projection-lomp 12
Cleaning 13
Accessories other Data
Adjusfinq the condensor for 24 x 36 or
38x38mmslides 14
Control by magnetic tape 15
Connecting the pradovit-n 15
Connecting pradovit-f with universal
Motor for various voltages 16
Interchangeable lenses 16
Projection-lenses 17
Projection distance + screen-image size 18
Projection screens 19
Interchangeable magazines 19
2

Setting-up
Removing the Cover
The pradovit® is ready for projection in 0 few
moments. To remove the cover, press in the
two catches and at the same time lift off the
cover from above. After projection push the
cover over the projector until the two catches
engage.
® = registered trade mark
3

Mains lead and Remote Control Cable
are enclosed in the package. These leads may
be stored in the magazine chamber. Cords
must be stored in such a way that the lid
closes properly.
Connecting to the Mains Supply
The motor of the prodovit is designed for
operation from A. C. mains of 110/125 V,
50 cycles, 110/125 V, 60 cycles or 220 V, 50 cy-
cles. A universal motor to be used for voltages
between 110-240 V and 50-60 cycles is avail-
able as well. This model must be connected
according to the prevailing current. Therefore
check the type and voltage of the supply
before connecting the projector. Note also
the data panel on the inside of the magazine
chamber lid.
The projection-lamp must also be rated at the
same voltage.
Connecting the Remote Control Cable
Plug in the remote control cable with the red
line on the plug opposite the red dot on the
back of the body. Push the plug home firmly.
4

Operation
~
.~
10422-31 ~
Switching On and 011
By depressing both buttons the projector is
switched on. To switch off the lomp only the
button with the lomp symbol is depressed. By
doing so the remote control is automatically
set to the center of the focusing range. The
fan is still left on for a quicker cooling of the
projector. Operating the button which is still
pressed down, switches off the projector
completely.
5

10432-31
Remote control with moving the magazine backward
and forward at will.
1.White button for slide changing. The slide
changing is operated by a short depressing
of the button."] Depressing the white button
for a short time only should specially be
observed for shifting the 1st slide into the
film gate.
2. Redbutton for remote focusing. Drepressing
the red button operates the remote control
for focusing.
3. Preselecting switch for backward and for-
ward movement of the magazine.
Depending on the position of this selecting
switch the magazine is moved for the next
slide forward or backward.
*) Holding this button down prolongs the dorkeninq
on the screen. It should, however, not be done lon-
ger than 3 minutes.
Operating the slide changer of the projector and
moving the magazine at will.
Short depressing = slide magazine moves
forward,
lang depressing = slide magazine moves
backward,
long depressing and turning = moving the
magazine at will.
Permanent depressing = darkening the
screen.
6

Inserting and changing of the magazine.
Before inserting the mogazine the slide
changer must be positioned in the magazine
chamber. If this is not the case, give the
magazine transport button a short push. Push
the magazine into the opening at the back of
the pradovit until it engages.
After the last slide in a magazine for 30 or
50slides has been projected, the slide changer
automatically remains positioned inthe maga-
zine chamber. The shutter hereby covers
the rays of projection. The projected maga-
zine is pulled out to the front of the pradovit
ond the next one is pushed in as before.
Re arranging slides with the magazine
in the Projector.
Should it happen that a slide is not in the
right order or upsight down, it can be re-
arranged while the magazine is in the pro-
jector. The button operating the slide changer
on the remote control is depressed and one
can now shift the magazine at will by tur-
ning the magazine transport button back-
ward or forward. The individual slide can
then be taken out to be re-arranged.
7

Focusing.
The projection lens is focused at the begin-
ning af a show to obtain the sharpest pos-
sible image on the screen.
levelling.
You can adjust the height of the projected
image by turning the two milled screws. This
also helps to level the projector on uneven
surtaces.
Do not tilt up the projector more than pro-
vided for by the levelling adjustment.
8

Operating the slide changer by hand alter
switching off the projector.
Depressing the magazine transport button
and turning the milled knob in the direction
of the arrow moves the slide changer manu-
ally.
9

The motor and gears of the pradovit
need no maintenance, and must never
be oiled.
Maintenance Opening the Lamp House.
Disconnect the projector before opening the
lamp house
The lamp house cover will swing open when
you gently lift the spring catch inside the
magazine chamber. To close, push down the
lamp house cover from the outside until the
spring catch engages again.
10

Taking off the side panel.
The side panel which carries the name
prodovit can be pulled upwards after first
maving the twa holding springs ta the side.
Before doing so, the screw which holds the
springs, must be slightly losened and de-
pressed.
., .. ~.
10433·31
Inserting and changing the projection lamp.
First lift out the lamp chimney. The prajection
lomp 300 or 500 watt with pin-type-cap
G 17 q far pradovit-f is pushed in firmly. The
pins in the cap of the lamp must be guided
exactly into the cutouts of the socket. To
change the lamp pull upwords without turn-
ing it.
The low voltage lamp 12 V/100 watt for the
pradovit-n has twa guide pins at the lamp
cap. Push the low voltage lamp in the cutouts
af the lamp socket and turn it to the right
until both pins engage in the bayonet fitting.
When taking out the lamp, push it down first
and turn to the left to disengage the bayonet
fitting.
11

10430-31
Centering the Projection Lamp.
For centering the projection-Iomp insert the
pinhole slide into the film gote. The filament
of the reflected image is observed by holding
a white piece of po per in front of the pro-
jection-lens. The best position 'can easily be
obtained by turning the centering screw as
shown in the illustrotion.
The above illustration of the image represents
the ideal focusing for the pradovit-f. With the
double image of the filament it is aimed to
get as a homogeneous field os possible. With
the low voltage lamp for the pradovit-n the
reflected image must be seen exactly obove
the lamp filoment.
12

Cleaning.
After opening the lamp house you can easily
withdraw the lamp chimney with the reflector
and the aspheric condenser, as well as the
holder of the movable condenser and heat
filter. For cleaning, especially of the pro-
jection lens, use only a soft, clean sable
brush (not an antistatic cloth). To clean the
projection lens simply unscrew it from the
front. All exposed lens surfaces, in other
words the condensers and projection lenses,
are coated with an antireflection layer. This
appreciably increases the brilliance and con-
trast of the projected image. Although the
LEITZ hard coating is highly resistant and
stands up to normal cleaning, the glass sur-
faces - as any high-quality optical glass -
are still sensitive to finger marks and other
dirt. So avoid touching any glass and mirror
surface with your fingers. Remove any major
contamination immediately with a soft, fluff-
less cloth which should, of course, be abso-
lutely clean.
13

Accessories and Other Data
Positioning the Condenser for 24 x 36 mm
or l h x l h inch (38 x 38 mm) Transparencies
The holder for the movable condenser and
heat filter can be inserted in two ways:
For optimum illumination on 24x36 mm minia-
ture transparencies place it in position 1
for 11/2 x 11/, inch (38x38mm) super-slides
place it in position 2.
With the pradovit-n the movable condensor
must always be in position 1.
14

Control by Magnetic Tape.
Every pradovit can be coupled with a mag-
netic tape recorder. For details see leaflet
31-29 b. When ordering the necessary cables
please state number of pradovit.
nov- J25V
Connecting the prndovit-n.
The pradovit-n - the low voltage type of the
pradovit - is filted with a 12 V/100 walt lamp
with cap Ba 15 s. The required transformer is
built into the housing below the magazine
chamber. The pradovit-n therefore can be
connected directly to the mains. The low
voltage pradovit is connected for mains of
220 V/50 cycles but can be used after resolder-
ing the corresponding connections with mains
110-125 V/50 cycles and 240 V, 50 cycles. For
details see above drawing.
15

Connecting pradovit-f with universal Motor for
110 240 V and 50 60 Cycles.
The voltage and cycle selector is fitted at the
bottom of the instrument and can be seen
after unscrewing the bottom-panel. The sett-
ing for the various voltages is done as
follows:
1. Losen screw with screw-driver.
2. Turn the Pertinaxplate so that the desired
voltage + cycle nomination stand oppo-
site each other as for instance in the illu-
stration 50 cycles, 220 volts.
To set the frequencey to 50 or 60 cycles, both
screws holding the rectangular Pertinaxplate
of the transformer are losened. The rectangu-
lar plate is then shifted so that the required
number of frequency stands opposite the cor-
responding voltage.
10479 -31
The interchangeable Lenses
You can change the LEITZ projection lenses
from 90 mm to 120 mm focal length on the
pradovit without adjustment of the condenser
system. For longer focal lengths a different
lens tube and movable condenser are re-
quired.
16

Projection Lamps.
The pradovit-f takes projection lamps of 300
and 500 watt with prefocus G 17 q pin type
cap. In connectian with the 500 watt lamp a
2nd heat absorbing filter as well as the guide
disk for the lamp housing code number
37915 C is essential.
The 2nd heat absorbing filter is fitted in the
upper longitudinal cutouts of the condensor-
mount and tightened down with the milled
screws.
The guide disk is fitted into the lamp housing
immediately in front of the reflector. This
guide disk regulates the ventilation of the
lamp and has no influence, whatsoever, on
the light intensity.
Projection lamps are available rated at 10volt
intervals above and below the normal supply
voltage. If your AC supply carries an over-
voltage, then you should choose, for instance,
a 230 volt lamp in place of the 220-volt one, or
in extreme cases even a lamp for 240 volts.
Before fitting a new lamp, check that the
voltage marked on it corresponds to the ac-
tual mains voltage. For instance, a 11O-volt
lamp must not be connected to a 125-volt -
worse still - a 220 volt supply, otherwise it
will burn out immediately. Projection lamps
are also very sensitive to knocks or appreci-
able tilting during burning. The manufactur-
ers can easily establish whether premature
lamp failure is due to any of these causes;
claims for replacement are therefore useless
in such cases.
17

Projection Distance and Image Size
The following table indicates the width of a square screen necessary for various projection
distances and focal lengths of projection lenses.
Focal Length
I
Projection Distances and Screen Image Sizes for 24 x 36 mm Frame (in feet)
of Lens 10 ft.
I
13 ft.
I
16 ft.
I
20 ft.
I
23 ft.
I
26 ft.
90 mm (3'12 ) 2'6 x 3'9 3'3 x 5'0 4'0 x 6'2 5'1 x7'8
i 5'10 x8'11 I 67 x 10'0
100 mm (4 ) 2'3 x 3'5 2'9 x 4'6 3'8 x 5'6 4'6 x 6'11 15'3 x 7'11 5'11 x 9'
120 mm (5 ) 2'5 x 3'8 3'x47 3'9 x5'9 4'4 x67
I 4'11 x 7'6
I
Projection Distances and Screen Image Sizes for 24 x 36 mm Frame (in feet)
30 ft.
I
33 ft.
I
36 ft.
I
40 ft. 43 ft.
90 mm
(3'1> )
177 x 117
I
100 mm (4 ) 6'10 x 10'4 7'6 x11 '6 8'2 x12'6
I
120 mm (5 )
I 5'8 x 8'8 6'3 x9'6 6'10 x10'4 77 x117 8'2 x12'6
This table applies to 24x36mm miniature transparencies. With l'hx1'h inch (38x38mm) superslides the
screen image is approximately 10 per cent larger at the same projection distance.
For larger projection distances and screen image sizes please ask for further details.
18

5867- 31
Screens,
To moke the most of the light output and
optical performance of your projector, use a
good quality screen of high reflecting power.
You can obtain such screens - portable or
stationary types - from your photo dealer.
You can also use the inside surface of the
cover the pradovit to view your slides in
normal room illumination.
The Interchangeable Magazine.
The LEITZ interchangeable magazines hold
30 or 50slides. The slide compartments are
numbered. Transparencies made from black-
and-white negatives are inserted in the maga-
zine upside down with the emulsion side fac-
ing the lamp.
Reversal colour transparencies are also inser-
ted upside down, but with the emulsion side
facing the screen. When binding the trans-
parencies between 2x2 inch (5x5 cm) cover
glasses, mark the slide accordingly with tilt-
ing strips or spots.
19

I
List I 31 26 b/Engl. I
ERNST LEITZ GMBH WETZLAR
Subsidiary: Ernst Leitz (Canada) Ltd., Midland, Ontario
Printed in Germany 1/61/DY/B