Siemens 2000 User manual

2000
-~. PROJECTOR
as Single-System Magnetic Sound Projector
with Universal Amplifier
Service Manual
Applies only in connection with Instruction Manual
to 2000 Projector
SIEMENS AKTIENGESELLSCHAFT
Berlin · Munchen
~
SIEMENS

... .
li
Contents
General
Universal amplifier
Recording stage for universal amplifier
Assembly of projector and amplifier
Sound heads
Magnetic sound tracks
Preparations
for film projection
Connection of projector to power supply
Voltage selection
Threading film for projection
P age 3
4
:,
6
6
8
9
9
9
9
Switching on amplifier 11
Loudspeaker connection 11
Microphone connection 12
Pickup connection 12
Tape recorder connection 13
Reproduction 13
Tone contro l 13
Instructions for film projection 14
Classes of magnetic sound operation 15
Magnetic recording 15
Checking recording just made 16
Sectional erasure of a recording 16
Sectional new recording 16
Magnetic mixing 17
Transferring optical sound to magnetic track 17
Servicing the projector 17
Servicing the sound heads 17
Servicing the magnetic heads 17
Slit image definition 18
Exchanging the exciter lamp 18
Frame counter 19
Conversion to double-system operation 20

General
The 2000 projector is a single-system magnetic sound model permitting the
dubb ing of amateur films and their subsequent projection as sound films.
The
projector is mechanically and electrically linked with an amplifier by a
simple plug connection. The
two units may be taken apart at any time.
The single-system
projector for magnetic sound may be converted into a
double-system model at any time through the addition of a double-system
sound att ac hment (Page 20).
F1g. 1
2000 projector
as single-system
model for magnetic
sound
3
.....J

....
15-watt universal amplifier Sf .V 6.7
Construction and specifications
Power supply: 110, 130, 220, 240 volts a-c
Microphone input: High impedance · Pickup input · Tape recorder input
Loudspeaker output: 15 ohms
Classes of operation: Optical sound reproduction, magnetic reproduction,
Magnetic recording, \ using recording stage Sf. MZ 6.3
opt1cal-to-magnetic rerecording f
Tube complement: 2x EF 86, 2x ECC 83, 2x EL 84
Voltage selector with fuse holder
0.8-amp fuse for 220 (240) v a-c; 1.6-amp fuse for 110 (130) v a-c
a masterswitch 0 off, 0 on)
b
exciter lamp S~itch 0 Off, {) on
c oass control
d treble control
e volume control for pickup
f volume control for microphone
g vJiume control for sound ftlm
reproduction
cldss-of serv1ce switch for
-:~-optical sound reproduction
3 magnet1c reproduction
0 magnetic recording
t 9 optical sound rerecording
Q other classes of operation
setscrew for elevation adJUStment
of projector base
k terminal strip
I interlocking pawl
m interlocking control button
n connection jacks for magnetic head
cables
upper jack for magnetiC rerecording,
lower jack for magnet1c reproduction
and recording
o ampl1f1er 1nputs for:
=d HI mtcrophone, high impedance
a tape recorder
=0. pickup
p ampltfler output
loudspeaker termtnals 15 ohms
q voltage selector with fuse
r
cover plate installed when
record stage is detached
m/
Fig 2a Universal amplifier, control stde
r n
Fig 2b Universal amplifier, rear- open
k
Two 6-point jacks at the front of the amplifier are for connecting the magnetic
head cables. The
upper jack marked MAGN ET IC RERECORDING (Magnetton-Um-
spielen) is used only for transferring sound on perforated magnetic film to the
magnetic edge track of 16 mm fi Im or vice versa.
4
-

For magnetic recording and reproduction, only the lower socket marked
MAGNETIC RECORDING and REPRODUCE (Magnetton-Aufnahme und -Wieder-
gabe) should be used.
Recording stage for universal amplifier
For dubbing work on magnetic sound film, the recording stage should be
screwed to the front of the amplifier. Universal amplifier and recording stage
are electrically interconnected by blade contacts b (Fig. 3a).
The magic-fan tuning
indicator c is for checking the modulation of the recording.
An automatic record lockout d prevents inadvertent erasure. The recording
stage is automatically disconnected by a relay every time the masterswitch of
the projector is switched on or off.
Fig. 3a
Universal amplifier
w1th recording stage
Fig. 3b
Front of recording
stage
~
w
e~
O--(g
b c d
a recording stage
b blade contact strip
c tuning indicator
d record lockout button
e switch for erase head
f record control
fhe red pushbutton d must be pressed prior to each magnetic recording. The
projector will thereupon be ready for service.
When mounting
or dismounting the recording stage, make sure that master
switch a (Fig. 2a)
of the universal amplifier is switched off.
5

11
Assembly of projector and amplifier
Place projector with sound head on amplifier so that front side of projector
::omes above that of amplifier (Fig. 1 ). The supports of the projector should
enter the four recesses in the top of the amplifier case. There should be an
initial clearance of approx. 2 cm between terminal block b (Fig. 2 a) of amplifier
and the front edge of the projector base. Press projector against terminal
block until interlocking pawl I on side of amplifier that faces terminal block
is heard to click into the recess at rear edge of projector base. Projector and
amplifier will now be both mechanically and electrically interlocked. Interlocking
can be disabled by gently pressing button m (Fig. 2a).
Optical/magnetic sound head
'"'· The 2000 sound film projector is fitted with the following optical/magnetic
sound head:
Fig. 4
6
Sf. TL 6.8- Optical/magnetic sound
head
for optical sound reproduction,
magnetic recording and reproduction
of 2.5 mm track
a head selector
b inscription plate with symbols ex-
plaining positions of selector a
c
magnetic head connecting cable

The symbols on inscription plate b (Fig. 4) ind1cate the positions to which head
selector a should be set for the various tracks.
~
c
0
Caution
This position is for scanning a 2.5 mm magnetic track. Magnetic
head c (Fig. 7) will here lie against the track.
This
position is for scanning optical sound. All magnetic heads are
pivoted away from the film so that they cannot scratch the optical
track.
In this position magnetic head c (Fig. 7) lies against the film and the
exciter lamp is switched on for optical/magnetic transfer.
To prevent damage to the optical sound track, optical sound film must
not be projected unless the white index mark is on the right.
7
__....

....
Magnetic sound tracks
Th e magnetic trac ks depicted below in Fig.5 are cu stomary for dubbing 16 mm film.
Fig. 5
M agnetic sound tracks
on
16 mm film
~u u-u - u- · u u l
u
~ ~ ~ ''
0
I ll : u
0
'
"~ 11 11 '" "'
11 11:1 .1 1:1111111: 11 11 1 11:11 111 111: 1 111. 1: 1 111111:1111111:1111 !
Equa lizi ng track 0.8 mm
Full -w idth tra ck 2 .5 mm
Eq ualizing track 0.8 mm
Ha lf- w idth o uts i de t rack 1 .3 mm
Eq u alizing track 0.8 mm
Half-width i nside track 1.3 mm
As shown in Fig. 7, the magnetic head for the 2.5 mm track is arranged su c ceeding
the optical sound head (looking in the direction of film travel) in order to con-
form to the international standard speci fying a lead-lag relation between sound
and picture of 28 frames in the case of 16 mm film with a full-width magnetic
track. (The standard lead-lag relation between picture and sound for optical
sound film is 26 frames.) Feature films with a magnetic sound track may thus
be projected with the standard lead-lag relation.
The 1.3 mm magnetic track is used when it is desired for certain reasons to
retain the
optical sound track, or when the optical sound track is to be trans-
ferred to the half-width magnetic track with the possible addition of sound from
other sources as well. lt may be recorded and reproduced with the magnetic
head for the 2.5 mm track. To insure uniform wear upon the head, the inside
half-width track and the outside half-width track should be used alternately.
Optimum tonal quality is obtained at a frame frequency of 24 frames per sec.
This corresponds to a tape speed of approx. 18.3 cm per sec.
8

Preparations for film projection
(see Instruction Manual for 2000 proJector).
Connection of projector to power s upply
Before inserting connecting plug of projector into power outlet, check whether
amplifier is set to correct voltage. On connection of the projector to the power
supply, the amplifier is also energized via the plug connection in th e projector
base. The amplifier operates on a-c only.
Voltage selection
If setting to other voltage is required, unscrew fuse holder q (Fig. 2b), remove
cover plate and set to appropriate value.
Select proper fuse: 0.8 Amp. fuse for 220 (240) va-c
1.6 Amp. fuse for 110 (130) va-c.
Before each projection
Check whether current of power supply is correct, whether correct res1stor has
been inserted in projector, and whether voltage selector on amplifier is
correctly set.
Threading film for sound projection
See under "Threading the film" in Instruction Manual for 2000 Projector.
1. Press down spindle k of pressure roller h (Figs. 6 and 7) and lock in axial
direction.
Fig. 6
Path of f il m through s ound head
a sound f1lm
1:> sile nt film
h pressure roller
i loop stabi li z er
I soun drum
m fi ltor rulle r
n lo wer (",procke t
p film loop
q guide r oller
r guide rol ler
9

....
2. Thread film end p (Fig. 6) emerging from film channel between loop stabi-
lizer i and pressure roller h, around sound drum I, over filter roller m and
under
sprocket n.
3. Close sprocket contact lever g.
4. Take film end over guide roller rand under guide roller q ( Fi g. 6) to take-up
reel and thread film in reel.
5. Press release button o (Fig. 7) to enable pressure roller h (Figs. 6, 7).
6. Pull film loop below lens holder downward so that film lies sm oothly be-
tween sound drum I and loop stabilizer i (Figs. 6, 7). If lower loop is too
small, pull more film down through film channel and enlarge upper loop by
pulling more film from supply reel.
7. Check running of film by briefly switch in g on projector us in g the automatic
inching button.
Threading film for silent projection
With si lent projection, the film is not passed through the sound head as in th e
case
of sound film projection. The film is threaded around lower sprocket n
(Fig.
6) so that sprocket teeth mesh with sprocket holes in film by pr essing
down pressure roller h (Fig. 6) and locking in axial direction.
Fig. 7 Optical/magnetic sound head
Roller plate with magnetic head assembly
10
a selector for the various
sound tracks
b inscription plate with
symbols explaining
positions of selector a
c magnetic head for 2.5 mm
track
d erase head
e sound head lens
f slit image adjusting
screw
g
sprocket contact lever
h pressure roller
loop stabilizer
spindle of p ressure roller h
sound drum
m
filter roller
n lower sprocket
o release button

....
Switching on amplifier
Switch on amplifier by means of masterswitch a (Fig. 2a). The amplifier is ready
for
service after a warm-up period of approx . 30 sec.
Fig. 8 Portable loud s peaker
Fig. 9 20- watt loudspeaker combination
Loudspeaker connection
Connect loudspeaker to amplifier output p (Fig. 2b).
For sound film
projection in very large rooms with poor acoustic conditions ,
the 20-watt
loudspeaker combination SI. L 6.4 (Fig. 9) should be used. The units
should be placed side by side and angled for any desired direction of projec-
tion, or located separately at each side of the projection screen for sound
projection with spreading effect.
For large auditoriums and theatres up to
approx. 1,000 seats, the 15-watt port-
able loudspeaker SI. L 6.1 (Fig. 8) should be employed, and for auditoriums and
theatres
of medium size for an audience of up to 700, the tweeter-woofer loud-
speaker system SI. L 6.2 (Fig. 8) should be chosen. The connecting lead is
coiled up inside the case.
As a nonperforated projection screen is generally used for 16 mm film in order
to avoid loss of brightness, the loudspeaker should be placed close to the side
of the screen and, where possible, on the same level as the screen.
The volume can be increased by opening up rear of loudspeaker case (Fig. 8)
and lifting it out sideways.
The amplifier may also be operated in connection with a 50-watt power stage
and a loudspeaker array.
11

....
Tape recorder connection
Connect tape recorder output with terminal =lJl (o in Fig. 2 b) if the pickup
input is used
otherwise.
Reproduction
Optical sound reproduction
Set head selector a (Fig. 7) to optical sound scanning (see under "Sound
heads"), set class-of-service switch h (Fig. 2a) to position -;~- and exciter
lamp switch b (Fig. 2 a) to position 0) . Actuate volume control g (Fig. 2a).
Microphone reproduction
Set class-of-service switch h (Fig. 2a) to position Q.
Actuate microphone volume control f (Fig. 2a).
Disk
reproduction
Set class-of-service switch h (Fig. 2a) to position Q.
Actuate volume control for pickup e (Fig. 2a). All other controls must be in
the zero position.
Magnetic reproduction
Connect magnetic head cable of sound head to connection jack :::>[ (n in
Fig. 2b) at front of
amplifier (Fig. 1 ).
Set class-of-service switch h (Fig. 2a) to position 3 and actuate volume
control g (Fig. 2a).
Tape
reproduction
Set class-of-service switch h (Fig. 2a) to position Q. The volume is controlled
by means of the appropriate control of the tape recorder.
Tone control
Turn knob cd (Fig. 2 a) to normal position (index comes at top). Adjust tone
control according to personal taste when film is running.
13

....
Instructions for film projection
PREPARATION
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Set up projector, plug in and switch on.
Adjust size
of frame by choice of correct focal length for lens.
Align frame.
Adjust speed.
Switch off projector.
Set up loudspeaker and plug in.
Connect microphone and pickup.
Thread film.
Switch on
projector, set selector a (Fig. 7) for the various sound tracks to
required position.
Switch on amplifier and adjust reproduction.
Switch on lamp current.
Adjust focus.
Adjust frame-line.
Check film speed.
For
optical sound film projection the film speed must be exactly 24 frames
per sec. The correct speed is obtained when the inner ring of the strobo-
scopic disk appears to remain stationary when illuminated by the pilot lamp.
For silent and magnetic sound film projection lower film speeds are
admissible.
If a 750-watt lamp
is used, the film speed must be at least 20 frames per sec.
15. Check volume control.
16. Feed film in reverse.
17 . Switch off projector.
18. Switch off amplifier.
Do not make any other adjustments on projector
PROJECTION
1. Switch on amplifier
2. Switch on pilot light.
3. Switch off room lighting.
4. Switch on projector and turn main knob slowly clockwise until ammeter
reads figure specified for particular lamp used.
5. Adjust volume.
6. Readjust tone control.
7. When film transportation, film speed and volume are found correct, switch
off
pilo t lamp.
14

Classes of magnetic sound operation
The uni ve rsal amplifier per mits any of th e fo llow ing c la sses of r eco rding:
r;:~r& ~
// (//
~ Erasure ~
Recordm
~&'2~
, Prerious
~ ~ef~'?~ng
The diagram appli es to all magnetic track s.
Magnetic recording
General magnetic recording in one
operation 1 erase head enabled) .
Erasure of section of an existing
record1ng (
erase head enabled).
New section added to existing
recordi n g; ol d recordi ng is co mp letely
erased ( erase head enabled).
Rerecording or mixing of existing
recording; old recording remains in
background.
( Tr ick circ u1t; er ase head disab led)
All tr ansitions from or to erasure ,
mixing and rerecor dmg are infinitely
adjustab le.
1. Set function switch h (Fig. 2a) of amplifier on red 0 . Press button d (Fig. 3 a) .
2.
Turn tone control cd (Fig. 2a) to midpo si tion (index points to 5- 6 ).
3. Tu rn r eco rd control f (Fig. 3b) clockwise as far as it will go ( Gl and
switch on
erase head (switch e Fig. 3 b C ).
4. Adjust volume c ontrol for pickup e or microphone f (Fig. L: a) according to
lou dest passage of performance so that bright segments of magic-fan indi-
cator c (Fig. 3a) come together with a clearance of approx .1 mm .
Rec
ording s of phonograph rec ords or live rec ording s using the mic rophone
may be made individually or mixed. For live recordings, switch off loud-
s peaker to prevent feedback. The recording c an be monitored with the aid
of a set
of high-i mpedance headphones that may be connected to the
output terminal of he loudspeaker.
5. On c ompletion of these preparations , thread film.
6. Switch on proje ctor. To begin recording, pres s button d of recording stage .
The
renewed illumination of th e magic-fan indic ator de note s that rec ording
may begin
15

'"'·
Checking recordings just made
1. Set function switch h (Fig. 2a) to 3 .
2. Run film in reverse to wanted section.
3. Run film forward and monitor recording by loudspeaker or with set of high-
impedance headphones.
Sectional erasure of a recording
1. Determine section to be erased by reference to frame counter or to scene
cue marks.
2. Run fiIm back past starting cue of the section to be erased.
3. Set function switch h (Fig. 2 a) to red 0
4. Sw i tch on erase head (set swi tch e, Fig. 3 b, to G ).
S. Turn r ecord contro l f ( Fi g. 3 b) counterclockwise as far as it will go (zero
position).
6. Switch on projector and press button d (Fig. 3 a) of recording stage.
7. On reaching section to
be erased, turn record cont rol clockwise as far as it
wil l go ( C ).
8. At the end of the section to be erased, turn recor d cont r ol f counterclock-
wise as far as it wil l go.
9. Switch off projecto r.
Sectional new recording
1. Note setting of control for proper modulation of microphone and tone arm
(see Magnetic recording, section 4).
2. Proceed as in case of erasure of indivual sections.
16
On reaching the point where the new section is to beg i n, turn record con-
trol f (Fig. 3 b)
clockwise as far as it will go and volume control e or f (Fig. 2a)
to
position noted.
When the
new section llas been added, turn record control counterclockwise
as far as it will go.

....
Magnetic mixing
(Mixing of sound from additional sources)
1. Switch off erase head (set switch e in Fig. 3 b to 0 ).
2. Proceed as when adding new section to an earlier recording.
Transferring optical sound to magnetic track
The universal amplifier permits the transfer of optical sound to a 1.3 mm
magnetic track or a separate magnetic film if the projector is additionally
equipped with a double -system sound attachment. Set function switch h (Fig. 2 a)
for this purpose to OPTICAL RE RECORDING (Lichtton-Umspielen). The index of the
head selector a (Fig.?) should come at the bottom . The sound lamp is switched
on. The
recording may be adjusted with the aid of the optical sound reproduc-
tion control o (Fig. 2a) and the red button d (Fig. 3 a) with the film running.
Modulation can be checked by observing the magic-fan indicator c (Fig. 3 a).
Sound from one or more additional sources may be added during rerecording
in the manner descr ibed. For reproduction on completion of r erecording, set
function switch h (Fig. 2a) to MAGNE
TI C REPRODUCE (Magnetton-Wiedergabe)
and turn head selector a (Fig. 7) so that index comes on left.
Servicing the projector
(see instruction Manual for 2000 Projector).
Servicing the sound head
Remove emulsion particles from sound head with a fine-haired brush prior
to each performance. Make sure that loop stabilizer and filter roller turn dur i ng
film travel.
Servicing the magnetic heads
Particles that have worn off the magnetic layer should be removed from the
magnetic heads at intervals with the aid of a fine-haired brush or hardwood
sliver in order to prevent any reduction in tonal quality.
Do not allow magnetic heads to come into contact with metal (e. g. screw-
drivers) or chemicals (e. g. acetone).
17

....
Slit image definition
This is adjusted at the factory and should not be readjusted later. However,
if the projectionist should consider readjustment necessar y on account, say,
of poor speech intelligibility or poor treble rendition, readjustment should be
entrusted to qualified personnel only .
Exchanging the excite r lamp
Loosen locking screw c (Fig. 11) of cover of sound head un it and open housing.
Turn lever a (Fig. 12) in direction of arrow and take out exciter lamp by turning
it
counterclockwise. Insert new lamp turning it in opposite direction. When
arresting pins are properly engaged and exciter lamp has been turned as far as
it will
go, return lever a to initial posit ion. The lamp will now be in i ts correc t
position .
18
Fig. 11
Position of exciter lamp
a leve r
b exciter lamp
c c locking screw
d scanning point

....
Frame counter
For quick location of desired sections in dubbing operations, the frame counter
Sf.Z 6.1 has proved of great use, which can be easily mounted on the front of
the 2000 projector.
Fig 12
Frame counter
m operate pos1t10n
a Zero-setter
b Receptacle lor frame
counter when in idle
position
The magnetic recording and reproduction of works of music and literature
protected by copyright is prohibited except with permission of the copyright
holder. For the rerecording of phonographic records, the consent of the record
manufacturer is required in addition.
19

... .
Conversion to double-system operation
The single-system magnetic sound projector ma y be further additionally
equipped with a double-system attachment. With doubl e- sy stem operation,
a separat e 8 or 16 mm magnetic film runs in synchronization with the picture
film. The double- system sound attachment is mechanically interloc k ed to the
projector, thus insuring complete synchronization. The 2000 projector 16/16
makes
an excellent preview projector. Workprint and separate 16 mm magnetic
track may be interlocked and screened at almost an y location. Original picture
and original recording can be interlocked for "quick access" films: Multi-lingu al ,
or other multi-track films may be recorded and projected, easily and inexpen-
sively. Double-system operatio n is suitable for many other applications. A
sound-on-picture film
or an old silent film with sprocket holes along both edges
can, for instance, be provided wit h a foreign -l anguage or other special track
on a
separate magn etic fil m. it is possible to transfer recordings on separate
magnetic film to sound-on-picture fi lm and vice versa, and also to add and mix
new sound form phonograph records, magnetic tape or microphone; the pro-
jector can thus be used for a var i ety of studio-type mixing operations. it may
also
be used as a small sound copyingmachine; in fact, t here are more than
9
ways of record i ng and rerecording. Our agents wi ll be glad to supply infor-
mation on the
additional equipmen t of a single-system magnetic sound projec t or
with a doub le-system sound attachment.
Fig. 13
Do ub le -syste m so und atta ch ment
2-2 700-05 2 -1 Print ed in Ge rmany 10 661 .36433