Kodak Sound Kodascope Projector FS-10-N

PR~JfCT~R
Get ACf/u(Jillted
Projection
of sound
Sound Kodascope
This manual
pictures
is designed
OPERATION
the amplifier
right
ond...ipeaker,
• Operational
maintenance
producing
from
how to thread
these steps are arranged
easily follow the text as you complete the individual
equipment
MAINTENANCE
....
be easy
and the instructions
the
start
followed
if your
closely.
to help you do this quickly.
the pzojecto
operate
will
is set up correctly
....
brilliant
the film, and how to
in sequence so hat you-cenoperations .
the things you will have to do to keep your
pictures, accompanied
by true reproduction
sound. Many of these suggestions will become a part of routine operation.
are just as important
Sound Kodascope.
of
They
as correct focus or good tone' if you are to enjoy your
PROJECTION
SETUP
The Night
•
If you are to receive the fullest satisfaction
Sound Kodascope,
quate
you should project
size and brilliance.
Generally
jector-to-screen
there are
.quickly
of screen, focal
of screen, and distance
to screen. Whatever
screen size, lens focal
pictures of an adespeaking,
four things which govern picture size-size
length of lens, brightness
jecfor
from your
the
projection
from pro-
the limiting
length,
distance-the
information
you
factor
may be-
screen brightness,
graph
need
below
to make
setup and enjoy maximum-size
or pro-
will give you
the correct
pictures.
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10
20
30
40
60
50
WIDTH
7S0-wall
T. M. Reg. U. S. Pat. Off.
projection
lamp.
M
OF
=
Malle
SCREEN
or Diffusing
70
90
80
IN
Screen.
INCHES
B
=
Beaded
Screen.
100
110
120
OPERATION
YOUR
SOUND
two cases-the
KODASCOPE
speoker
Locate the speaker
as possible
is contained
in
case.
unit in a convenient position as close
to the screen. Lift the two latches and swing
the sides open. Remove the
and
equipment
unit and the Kodascope
POWER
CORD.
TAKE-UP
REEL, PROJECTION
Then turn the speaker
the audience. The speaker
Place the Kodascope
opening
LAMP,
toward
case may be closed or left open.
case on a firm table with the front
end flush with the edge.
lift the four latches and lower
the two sides of the case.
Several operating
=
can
-if
be
operated
additional
closed case
pressions
Kodascope
II
positions are possible. The Kodoscope
from the
neightis
case
rrecessaryj'it
as shown
con be placed
as shown on the opposite
in the case
side indicate
page.
below,
or
upon the
Slight de-
the locotion for the
feet when it is used in the latter position.
Remove the two REEL ARMS.
be removed,
the table
if desired,
The larger
until it is released
or it
Locate the lower spring
NOTE: When using a 1200-,
and attach
SCREWS
reel with a core diameter
the upper
the reel-arm
belts over the reel-arm
belt according
1600-,
or 20oo-foot
pulleys.
to reel size.
take-up
reel (or any
of more than 4 Y2 inches), place the lower
belt over the larger reel-arm
Press the SPRING
raise
CATCH;
and
remove
the LA,MP-
HOUSING.
Insert the projection
flange
toward
lamp into the SOCKET with the larger
the front
of the projector.
Press down on
the lamp and turn it to the right as far as it will go.
reel arms. Use a coin to tighten
screws. Place the spring
spring
on the table
as shown above.
Loosen the two REEL-ARM
and lower
can
the rear of
from the hinges. The small
side of the case can be ,left extended
can be dropped
cover-side
by pushing it toward
pulley.
For smaller
Lower the lamphousing
of the housing engaging
clicks into place.
Attach
the
over the lamp with the grooves
the RAILS. Be sure the spring catch
Secure the lamphouse
power
cord
top
to the receptacle
in place.
on the left
side of the projector
and to a 110- to 125-volt,
60-cycle
outlet.
c-c electrical
50-
or
reels, use
the small pulley.
Be sure that the belt is not wlsteo and that both strands
are under the GUIDE
ROLLER.
Remove the two
knurled
TOP
SCREWS
from
the LAMPHOUSE
and remove the top from the Kodascope.
III
Withdraw
sufficient
case Cordomatic
speaker-cord
speaker
cord
from
the
reel to reach the projector.
plug
to the receptacle
spe okerAttach
in the rear
the
of the
projector.
To recail the speaker
cord, pullout
clicking sound is heard;
on the cord until a
then permit the reel to draw
the
cord into the case. Do not allow the plug to slap against
the case; hold the plug while °the cord is being recoiled.
The ON-OFF
all
circuits.
lighted
is the
SWITCH
With
the
switch
and the projector
Turn the CONTROL
master
at
control
ON,
is ready
the
SCREW
adjustment
a trifle
either
way
turn the ElEVATING
provisionally;
slightly after the framing
turn the LAMP CENTERING
with a coin or screwdriver.
adjustment,
this adjustment
area on the screen
of the lamp' to improve
of the brightness,
For vertical
is
for operation.
the lens until the margins of the lighted
the uniformity
for
to PROJECTION LAMP. Rotate
SWITCH
are sharp. For lateral
switch
threadlight
Make
WHEEl.
it may have to be altered
lever has been set in the proper
position for the film.
Turn the control
switch to OFF and
turn the
LAMP CONTROL knob in a clockwise direction
it will go beyond
next
EXCITER
as far
as
ON. As soon as the small red window,
to the fidelity
lever,
is illuminated
by
the
exciter
lamp, the sound system is ready for operation.
~~~I~=--':'-Now
JHREAD THE KODASCOPE
Turn the THREADING
counterclockwise
KNOB
to be sure that the film is properly
is no slack film between
film
the supply
perforations,
and
that
a few times
threaded,
that there
reel and the feed
sprocket, that the claws of the pull-down
the
•
CHECKVVVV
AFTER THREADING,
1
•
the
engage
loop
with
sizes are
maintained.
2
3
4
Turn the MOTOR
CONTROL knob to SOUND
SPEED.
Be sure the EXCITER LAMP CONTROL knob is turned
beyond
ON as far as it will go.
Turn the CONTROL SWITCH to MOJOR
that the film is running properly.
and check to see
Then turn the control
switch
to
PROJECTION
LAMP.
turned
off
automatically
when the control
The
thread light
is
switch is
turned to PROJECTION LAMP.
S
mlliiiiiillllllir .
Focus the Kodascope
by turning
the lens back
and
forth until the picture is sharp.
TONE
.fiillliii 1111
I
11I1111I1111I
6
SOUND KoDASCOPE
-b",
COMPANY
EASTMAN-KoDA~
R.OCHESTER.
°
oN .Y.
next frame
at the top
picture, move the FRAMING
FS-10-N
MODEL
If the picture shows a blank strip or the edge of the
IV
or bottom
of the
LEVER up or down.
projected
It
THREADING
Place the reel of film on the supply spindle with the
film coming from the bottom of the reel, perforations
toward
you. Lock the reel
on the spindle
latch. Draw off approximately
with
the
three feet of film.
Insert the film between the feed sprocket and sprocket
clamp, engage
the film perforations
with the sprocket
teeth, and close the clamp.
Open
the
gate
by
pushing
forward
on the
lever
until the gate latches.
Turn the threading
are withdrawn
knob
until the
Form the upper
plate.
Form
a
claws
loop. Then slid.e the film behind the
gate and center it between
rear
pull-down
from the gate.
the .edge guides on the
Close the gate.
lower
loop
pressure-roller
lever
sound-loop
roller.
Press dow
on
as illustrated,
and
insert
hold
the
film
back
the
over
the
Release the pressure-roller
tb
tension-roller
lever.
lever and place the
film beneath the sound drum.
Thread
the film between
sprocket
clamp.
the sound sprocket
Engage
the
film
and the.
perforations
with
the sprocket teeth and close the clamp. There must be
no slack between the sound-loop
roller and the sound
sprocket.
Thread
the film over
the stripper
stud and
beneath
the snubber.
Place the take-up
reel on the take-up
spindle
and
lock the reel on the spindle with the latch. Then insert
the end of the film into a slot in
the core of the take-up reel. Take
up the slack between
sprocket
11
and
To place the take-up
proper
the sound
the take-up'
reel.
belt under
tension, hold the take-up
reel with the left hand and turn
the
knob
spindle
on
the
rear
in a clockwise
of
the
direction.
B
A
toward
SOUND
the projector
side away
Focusing the beam from the exciter
track of the film is extremely
important
lamp on the sound
and is accomplished
lens (a), and the other with emulsion
from the projection
lens (b).
Regardless of which type film you are using, focusing is
extremely
simple.
Turn the
TONE
control
knob
by moving the FIDELITY lever up or down. The position of
wise as far
the sound track on the film base will vary depending
up or down to the position giving the most complete
whether
you are using (a) l o-rnrn sound-on-film
upon
originals,
as it will
of sound. When the bearp is sharply
l o-rnm prints from 35·mm originals, or (b) l o-rnrn duplicates
track, you will obtain
of l o-mrn originals,
speech will
block-end-white
The sketches illustrate
or Kodachrome.
the position of the beam upon the
two tY,f>esof_film: ~ne threaded
with emulsion side of film
brilliant
range
focused on the sound
reproduction
be crisp and distinct. After
of music, and
the fidelity
has been set, adjust the TONE and VOLUME
the conventional
clock-
go; then move the FIDELITY lever
lever
controls in
manner.
REWINDING
At the completion
of projection,
to OFF and pull out on the REWIND
Attach the film to the upper
turn the control
switch
LEVER.
reel by inserting the end of
the film into the reel slot. Give the reel a few turns toward
the Kodascope
to make sure that
the end of the film is
secure. See that the film is not twisted
between
the two
reels.
Turn the control switch to MOTOR and permit the film to
rewind.
Exert
a slight
retarding
pressure
reel to keep the film from unwinding
After
the film is rewound,
on the lower
too rapidly.
turn the control switch to OFF
and return the rewind lever to its original
position.
TO PROJECT SILENT PICTURES
Thread
the film through
the feed
sprocket,
the gate,.
and through the sound sprocket as shown in the illustration
on the next page:
Be sure to allow an upper
and a lower
loop.
Turn the EXCITER LAMP CONTROL
VI
knob to OFF unless
a microphone
instructions
toward
or. a phonograph
below).
Turn
pickup is to be used (see
the
the silent speed
MOTOR
arrow.
silent pictures with the MOTOR
If silent pictures
are
CONTROL
Regulate
knob
the speed
of
CONTROL knob.
projected
without
microphone
pickup, it 'is not necessary to have the speaker
or
connected.
MICROPHONE OR
PHONOGRAPH PICKUP
To use phonograph
music or supply
ments with
silent pictures,
microphone
or
left
a jack for
phonograph
pickup
is provided
side of the Sound Kodascope.
with
certain
auxiliary
tortion
high-level
volume
It may
phonograph
control
on the
microphone
com-
a high-impedance
be necessary
pickups
pickup
to
in the first stage of the amplifier.
on the
to
use an
prevent
dis-
Sound from the
film is not cut off when a plug is inserted in the jack, thus
permitting
"mixing"
of sound from microphone
or phono-
graph with sound from film.
Microphone
exciter
Control
or Phonograph
and Silent Pictures: Turn the
lamp control knob until it clicks at the ON position.
volume
with
turn the VOLUME
howls or "feeds
Microphone
the VOLUME
control
or Phonograph
control
or
knob.
Do not
that the microphone
back."
and Sound Pictures: Regulate
sound from film with the exciter
microphone
control
up so for
phonograph
lamp
volume
control
with
knob and
the
VOLUME
knob.
Oper(Jting Suggestions
No sound
will be heard
if any
of the following
• Speaker
and projector
• Volume
control
not connected
not turned
not turned
• Exciter lamp
burned
out, or not located
control
by phonograph
or microphone,
amplifier
on.
turned
Pictures
will be out of focus
in the projected
on. Red window
lamp
control
knob is at sound
the
cord. _
not illuminated.
on all three
studs,
cell need replacement.
be sure the exciter
will go and that the motor
unsteadiness
by speaker
control
pictures,
exist:
on.
• Exciter lamp
• Fuse blown.
• Tubes or photoelectric
For sound
conditions
speaker
if the gate
need
knob
speed.
is turned
For silent pictures,
not be connected
is left open
beyond
during
projection.
to the
ON as far as it
not accompanied
projector,
nor the
Loss of loop will cause
pictures.
VII
MAINTENANCE
CLEANING
LENSES AND
The condensing
REFLECTOR
lenses and the
projection
lens of
Sound Kodascope
are lumenized,
that is, a special
coating
applied
the
has been
The tinted
appearance
to
all
air-glass
like
surfaces.
of the lenses is due to this treat-
ment, which increases the light transmitted,
the brilliance
the
hard
thus increasing
of the image on the screen.
any fine lens, the projection
lens on your projector
should be cleaned with care. Remove the lens by drawing
it out of the
Kodak
lens holder.
lens Cleaning
With
a soft
Paper, carefully
lintless cloth,
wipe
or
the two lens
surfaces.
To clean the CONDENSER
as described
on page
lENS,
remove
the LAMPHOUSING
III. Remove the condenser lens from
the housing and clean it in the same manner as the projection lens. When replacing
as far
the condenser lens, push it in
as it will go and tighten the lock screw. Clean the
REFLECTOR without
removing
it from the lamphousing.
Do not wet the cloth used for cleaning
is required,
breathe
lenses. If moisture
on the lenses or use a drop of Kodak
lens Cleaner.
CLEANING
THE GATE
To remove small pieces of film emulsion which are visible
on the screen during. projection,
throunh
the lens holder
carefully
remove
the
lens, reach
with a brush or small stick, and
run the brush or stick around
the edges of the
cperture.
To remove particles
of emulsion from the surface of the
GATE, use a strip of soft cloth about the width of the fllrn.
Rotate the threading
withdrawn.
..,
Dampen the cloth and thread
just as film is threaded,
up and down.
VIII
knob until the pull-down
claws are
it into the gate
close the gate, and draw the cloth
~
I
l~
..
CLEANING
THE SOUND
OPTICS
OILING
To clean the sound optics, which must be done occasionally,
remove
the KNOB
and
EXCITER LAMP
the SCREW holding the RETAINING
the right and draw
to bend
nearest
Wipe'
end with
a soft
Be careful
OPTICS.
the end of
the sound drum with
opposite
SPRING, move the spring to
out the SOUND
the spring.
the SOUND
When
DRUM.
not
the sound optics
a soft cloth and clean
brush. Clean
replacing
the
the end of .the
PICKUP ROD with a brush' and remove
SOUND
Loosen
COVER.
the
any dirt from
sound optics
be
is between
the
sure that the cam on the FIDELITY lever
There are six points which require occasional lubrication.
They will need oil before
at regular
intervals,
the Kodascope
depending
is first used and
upon how frequently
the
Kodascope is operated.
In ordinary
service, the. motor bearings
must be oiled
about every five or six months with five or six drops of oil.
Oil the four
bearings
bearings
places indicated
in the supply
and
are self-lubricating
Use Kodascope
on the illustration
take-up
spindles.
and the
All other
and need no oiling.
oil or an oil of similar body.
Do not use
light oil.
rails of the sound optics.
Replace the cover over the exciter lamp.
REPLACING LAMPS
Threadlight-
To replace
the shield by drawing
scope;
then
6-watt,
unscrew
120-volt,
Screw
the
new
the threadlight,
it toward
the
lamp
from
the
S-6 clear, candelabra
lamp
shield. Use the locating
into the
first
the front
remove
of the Kodasocket.
Use a
screw-base
socket;
lamp.
then replace
lug and slot to correctly
the
position
the shield.
Projection
. replace
adjust
Lamp-Follow
the projection
for
centering
evenness of
the directions
lamp. After
illumination
on page
installing
by turning
screw. If the lamp has an opaque
III to
a new lamp,
the lamp
top, do not
use a lamp cover.
Exciter Lamp-Loosen
CITER
LAMP
mounting
COVER.
and
at the
counterclockwise.
the KNOB
Push forward
and
on
same time twist
The lamps
have
remove
the
the
prefocus
the EX-
spring-flange
exciter
bases
lamp
and
can be inserted one way only. Turn the lamp clockwise to
lock it in position.
IX
~/
REPLACING
FUSE
Failure of the exciter lamp to light may indicate trouble
in the ornplifler
system or that the fuse is blown. To replace
the fuse, located
on the bottom
connect the power
the fuse from
of the Kodascope,
cord, unscrew the FUSE CAP,
the cap.
dis-
and
pull
Insert a new fuse (3 amperes,
250 volts, part No. 78464)
into the cap and replace
the
cap on the machine. If the exciter -lamp still fails to light,
the oscillator
tube
(the second tube from the right-hand
end) may need replacing.
The Sound Kodascope
alternating
direct
current
current,
FS-10-N is designed
only. If the projector
the
fuse
will
blow.
for use with
is connected
See
page
XIV
to
for
servicing helps.
To replace
removed
opposite
so that
the upper
the opening
between
pulley
will turn freely.
in the front
the two BELT GUiDES
the lower spring
ceed as described
x
cover. When
the upper spring belt, push the rewind
through
lever
in
Feed the belt
of the Kodascope
and the pulley.
belt, pull the rewind
above.
To remove the threading
and
To replace
lever out and pro-
with the elevating
clears the extended
nut holding
glider
the flywheel.
the flywheel
the washer between
When
attaching
post; then remove the smaller
Hold the sound drum while turn-
screw as indicated
and threading
the flywheel
the
knob. Raise
screw until the flywheel
ing this nut. Place the new belt around
replace
is also
knob, loosen the two
screws in the hub of the threading
the Kodascope
Remove the four SCREWS from the forward
replacing
knob must be
and it is more convenient if the flywheel
removed.
R~PLACING BELTS
the DRIVE BELT, the threading
front
the pulleys;
then
knob. Be sure to use
and nut.
cover,
in the illustration.
replace
the
short
REPLACING
AND
TUBES
PHOTOELECTRIC
CAUTION:
CELL
Disconnect the power cord.
Remove the UPPER PANEL for access to the tubes. When
replacing
tubes, consult the decalcomania
illustrated
To reach the tube for the first stage
below.
of amplification,
remove the TUBE COVER SCREW indicated
in the illustration
and remove the small cover. Toke the GRID CLIP from the
tube and remove the tube.
To remove
SPRING
the
PHOTOELECTRIC
CLIP and withdraw
photoelectric
toward
hold
back
on the
the cell. Be sure to replace
the
cell with the concave surface of the CATHODE
the SOUND
REMOVING
Remove
CELl,
PICKUP ROD.
THE AMPLIFIER
the
UPPER and
LOWER
AMPLIFIER PLUG from the receptacle
Disconnect
PANELS.
and remove the TONE
and VOLUME control knobs from the operating
move the three AMPLIFIER SCREWS holding
the platform
and carefully
REMOVING
withdraw
the
side. Re""-
the amplifier
to
the amplifier.
THE AMPLIFIER
PLATFORM
.•
Gjji.-/
Service experience
for
replacing
brushes or the motor governor,
necesscry, proceed
To replace
has shown that there is seldom need
but if it is
as follows:
the motor,
governor
brushes, or governor,
it is necessary to remove the AMPLIFIER PLATFORM. Turn the
Kodascope on its side and use a broad-blade
to remove the four
roundheaded
<I( -
{
..,
-
...
,
screwdriver
screws which hold the
platform
to the base. Take out the three
indicated
in the illustration
COVER
SCREWS
and the five screws around the
base of the cover. Lay the cover on its side. Do not disconnect the rheostat. and
out. To replace
the
switch wires.
MOTOR
BRUSHES,
lift
the platform
unscrew
the
com-
XI
position
caps
and
withdraw
the
brushes are square; the GOVERNOR
replacing
the platform,
The
motor
to decrease the speed. Turn the screw one-half
BRUSHES round.
brushes.
When
recheck the speed.
be sure that the four large washers
fit around the feet of the platform.
Replace the amplifier
large
platform.
spacer washers are around
turn; then
Be sure that the four
the platform
feet
and
that the feet are flat on the base. Attach the cover with
REMOVING
THE MOTOR
GOVERNOR
Remove the nut and washer-cap
from the MOTOR
SISTOR and push the resistor to one side to provide
for removal
of the fan and' governor.
the ,eight screws.
RE-
clearance
Loosen the screw
Slide the amplifier
carefully
into place, taking
care not
to strike the sound pickup rod. Fasten the amplifier
platform
to the
with the three screws and attach the two control
in the hub of the fan and remove the fan. Loosen the two
knobs. Adjust the BUMPER BRACKET, so that there is approxi-
screws holding
the governor
mately
sary,
the
replace
placing
round
the governor,
on the motor shaft. If neces-
governor
brushes.
push it just for
When
enough
re-
back on
the shaft to place the brushes under slight spring tension.
Position the governor
on the shaft
screws can be tightened
so that
the two set-
on the flats of the shaft. Replace
the fan with the blades
bendinq
toward
the motor and
tighten the setscrew against the flat of the shaft. Replace
the washer on the motor resistor bolt and tighten the nut.
. ADJUSTING
THE MOTOR
SPEED
At sound speed, the sprockets should rotate
at not less
than 178 or not more than 182 rpm. Use a tachometer
coun! the
revolutions.
GOVERNOR
ADJUSTING
XII
To increase
SCREW
the
clockwise;
speed,
turn
or
the
counterclockwise
Ys -inch
photoelectric-cell
clearance
between
the bumper
box. Attach the amplifier
plug.
and the
1.-
I
REPLACING DAMAGED SOUND
PICKUP ROD
Remove the flywheel
page
pickup
ROD
(see page
Xl and ornplifler
(see
XI). Lift the felt washer from the end of the sound
rod
and remove
BRACKET. Draw
the two screws from the SOUND
out the sound rod.
Unwrap
from the old sound rod and place it around
the foil
the new rod.
The foil serves to anchor the rod to the bracket
and to
ground the sound rod to the machine.
Remove the exciter
ROllER lEVER and
bearing.
down
Be careful
the
openinq
lamp cover, hold down the TENSION
pull the SOUND
small
DRUM and shaft from
not to damage
retaining
spring
the
the sound drum. Hold
below
the
sound
rod
and insert the end of the new sound rod with the
clear surface down and parallel
t~ the glass of the sound
optics. Replace the bracket
over the foil wrapping
on the
rod and attach the bracket
loosely so that further
adjust-
ment can be made.
ALIGNING
CAUTION,
THE SOUND
PICKUP ROD
Avoid shock from high voltages-do
not touch any internal
ports of the amplifier.
Move
the amplifier
plug the amplifier
close to the Kodascope
base and
cord into the base receptacle.
the power cord to the Kodascope,
Attach
turn on the master ON-
OFF switch and turn the EXCITER LAMP CONTROL
clockwise as far
light on the photoelectric-cell
a piece of paper
PICKUP ROD and
knob
as it will go. Place a desk lamp to cast
end of the sound rod. Insert
between
the SOUND OPTICS and SOUND
then move the sound rod back and forth
until the beam of light from the sound optics is centered
in the spot of light projected
the two
power
from the sound rod. Tighten
screws in the sound-rod
bracket.
Disconnect the
cord and the amplifier.
Be sure the washer is on the sound drum shcft, then replace the shaft and attach
Replace the amplifier
the flywheel,
as described
washer,
and nut.
above.
XIII
I
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SERVICING
THE AMPLIFIER
(Symbols referred
to are those used in the diagrams.)
I I~
IF__ F_U
__S_E_N
__O_T__ B__L_O_W
__N
IF__ F_U_S
__E_B__L_O_W
__N
No Sound From Film Altho Tubes Glow
1. No
"background"
exciter
lamp
is normal
is heard;
control
fully
to a properly
is due largely
volume
advanced.
operating
control
And New
and
"Background"
sound projector
and
to tube noises.
a. Speaker
voice coil may be open.
necting cord, and speaker
and cord assembly
diagram).
b. Remove amplifier
(1) Condensers
Test coil, con-
plug (refer to loud speaker
continuity
78335)
of
with
secondary
winding.
3. Check
sections
Condenser
No. 79826)
R-16 (part
R-17 (part
No. 78361),
(with C-2 part
No. 69301),
No.
and
58527),
No. 58426),
Condenser
Condenser
Condenser
C-16
C-13
transformer
attention
C-9 and
T-4
(part
to ,high-voltage
C-12 of No. 78677
Filter
Block for shorts; also check C-16 Condenser
No. 79822)
for short.
connecting-cord
5 for short to ground.
to disconnect
wires 2, 3, 4, and
Terminals
6 and 7 will normally
to ground.
wires 2 and
It may be necessary
5 to distinguish
between
a
shorts
or
short in the cord and a short in condensers.
C-11 (part
5. Check
(part
broken
No.
and output tubes.
power
special
show a very low reading
(2) Exciter Lamp Control
-
Check
4. Check amplifier
C-14 and C-15 (part
for shorts.
Resistor
2.
(part
and check:
Fuses Blow Repeatedly
1. Test rectifier tube, oscillator,
No.
_
amplifier
wiring
generally
for
leads.
- -798-2-2).
(3) Exciter
R-18 (part
Lamp
Rheostat
No. 78476)
and
Amplifier
for continuity;
to Exciter Lamp Socket
(part
Amplifier Plug Receptacle
Switch
also, wiring
No. 58343)
LOW
AMPLIFIER
(part No. 58337).
1. Test all tubes.
2. If "background"
microphone
is heard.
or phonograph
OUTPUT
and to
Plug in a high-impedance
to amplifier
Check
voltage
all amplifier
voltages-refer
diagram.
pickup and listen for sound
2. Exciter lamp
reproduction.
thermoammeter
current
may be low-radio
will be required
frequency
to check current.
a. If sound is now heard:
3. Photocell
(1) Inspect
good
photocell
contact
normal
for proper
with spring
appearance
and
clip. The cathode
cell has a brownish
or "silvery"
position
appearance;
usually indicates
for
in a
whitish
leakage
of air into the cell due to fine cracks in the glass
envelope
or a broken
seal.
(maximum
bridge
(2) Inspect
sound
rod for breakage
or misalign-
XIII.
b. If sound is not heard:
(1) Check grid clip on 6J7 tube for good
(2) Check position of 6J7 tube in its socket.
(3) Test 6J7 tube in tube tester.
(4) Test all other tubes.
XIV
contact.
circuit.
with voltage
deteriorate
may
be
.
volts) requires
Distortion
and
low.
Accurate
the use of an
.
noise
at too high a value
will be
and
setting
electrical
excessive
photocell
will
rapidly.
4. Extra extension
load.
ment. See page
voltage
90
cord not heavy
enough
to carry
the
SOUND
KODASCOPE
SPECIFICATIONS
ELECTRICAL
--
Power Service Required:
.
1 0-125 volts, alternating
current, 50-60
cycle only .
Power Consumed by Projector and Amplifier:
1100 watts with 750-watt
lamp.
Input to lO-inch Speaker:
10 watts.
Fuse:
Part No. 78464,
Type 3 AG Radio Receiver, 3 amperes,
250 volts.
Projection Lamp:
Part No. 54909,
750-watt,
115-volt, T-12 medium prefocus base.
Exciter Lamp:
Part No. 58260,
base.
Mazda
C, 4 volts, 0.75 amperes,
Mazda
B, 6-watt,
5-8 clear, C-6 filament, single contact prefocus
Threadlight:
Part No. 45250,
120-volt, 5-6 clear, C-7 A filament, candelabra-screw
base.
Tube Complement:
Part No. 58300, 1-6J7;
Part No. 79211, 1-6J5GT;
1-5Z4 or Part No. 90962, 1-5Y3GT/G.
Part No. 78681, 3-6V6GT;
Part No. 78362,
Photoelectric Cell:
Part No. 58525,
RCA921.
xv
EASTMAN KODAK COMPANY • ROCHESTER4, N.Y.
3-52-GLP-B
L ithog,aphed
in the United
States
of Arne, ica
-
Lt
.-
;/
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