Roland Series 300 Operating instructions

REPAIR MANUAL
ELECTRONIC MODULES FOR USE
WITH POLAROID LAND SERIES 300
AUTOMATIC SHUTIERS
AUGUST 1972
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POLAROID CORPORATION I REPAIR DEPARTMENTI CAMBRIDGE, MASSACHUSETTS

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INTRODUCTION I
This publication suppli~;additional information required to repair automatic
shutter Electronic Modu"s. These $hutters, and associated Electronic Modules
are used in the Polaroid ~ries 300 Cameras, 8$ shown in the following table:
Camera Model
315
320
325
330
335
340
350
i
! Shutter
388
386
389
362
381
383
384
Module
Type No.
12·13·14·15
12·13·14·15
12·13·14·15
12·13·14-15
12-13-14-15
5
3· 4· 6- 9
10-11·16
The manual. which is to be used in conjunction with the Repair Manual on
Automatic Shutters dated May. 1968, is divided into four (4) sections.
Section 1- Explains the pr:inciples of operation of the Shutters, including both
electrical and mechanical theory.
Section II -Reviews information previouslV released on the Series 100 ard 200
Camera Shutters and notes the differences, principally product improvements.
between the various shuttel1,
s.etion III -Provides identification information for all the Electronic Modules
used
in the 300 Series Cameras and Shutters,
Sect10n
tV -Gives troubleshooting and repair procedures f()f Electronic ModulM.
including a Substitution Table, which provides interchangeability data.

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TABLE Of CONTENTS
-Title Page
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I. PRINCIPLES Of SHUTTER OPERATION. 1
A. Mechanical Operatlon.. . • 1
B. Electrical Action. .. •. . 3
II. OIFFERENCES BETWEEN MODELS. 9
-A. Similarities, . . . . . 9
B. Differences........
9
C. Color Coding . . .• ..
9
1. Control Shutter Speed • 9
2. Component Identification. 10
D. Shutter Aperture Operation •
10
1. Shutter Model 384. . . .
11
-a. Aperture Wheel Operation
It
b. Scone Sele<:tor •
11
III. ELECTRONIC MODULES.. .
13
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A. Module Oporation . . • . .
13
S. Module CI.a$$ific3tion. • . • 13
1, Electronic Module Type t . 13
2. Electronic MOdule Type 2.
16
3, Electronic Module Type 3. 18
4. Electronic Module Type 4. 21
5. Electronic MOdule Type 5. 24
6, Electronic Module Tvpe 6, 25
-1. Electronic Module
Type 7.
26
B. Electronic Module Type 8. 29
9. Electronic Module Type 9 .•
29
10. Electronic Module Type 10 . 30
11. Electronic Madute Type 11 •
31
12. Electronic Module Type 12 . 32
13. Electronic Module Type 13 • 35
14. Electronic Module Type 14 • 37
-15. Electronic Module Type
15 . 39
t6. Electronic Module Type 16 • 40
IV. TROUBLESHOOTING AND REPAIR
41
A. Testing.. ... .. 41
1. Resistors and Capacitors •.•
41
a. ResistorS.. ...... . 41
b, Capacito~ . . • • . . . , . . 41
2. Replacing Resistors and Capacitors .
41
3. Transistors . . . . . •
41
4. lotegtated Circuits (I.e.) • 42
B. Interchanging MOdules . . . • . . .
42
C. Parts Information . . . . . •• • 47
1. Part. In Stock. .. .....
47
2. Pamand Assemblies No longer Stocked
47

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-LIST
Of I~LUSTRATIONS
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figure No.
1·1
1·2
1·3
14
1·5
1-6
'·7
1·8
1·9
1·10
2·1
2·2
2·3
2-4
2·5
3·1
3-2
3-3
3-4
3-5
3-6
3-7
3·8
3·9
3·10
3·11
3-12
3·13
3-14
3-15
3,16
3·17
3-18
3-19
3-20
3·21
3·22
3·23
3,24
3-25
3-26
3·27
3·2B
3-29
3·30
3-31
3·32
3-33
litle Page
Basic
Shutter Components 1
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Cocking the Shutter • 1
· · ·
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Controlllng the Timing Switch. 2
Cocking the Slide . • 2
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Tripping the Shutter.
2
·
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Releasing the Opening Blade. 3
Schematic 362 Shutter . 4
·
Magnet Holding Circuit.
5
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capacitor Holding Circuit. 5
·
RC Timing CirctJit • 6
· · ·
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Type List of Electronic Modules , 8
Photocell Color Chart 9
·
Capacitor Color Codes .
10
· ·
Aperture Wheel Operation
11
· ·
CapacitorSwitch Rotor
11
· · ·
Top View Module Type No.1.
12
Bottom View Type 1. 12
· · · ·
E1ectrical Values &: Part Numbers Type 1
14
Schematic
Type 1 . · · ·· ·
15
Top View Module Type No.2.
16
Bottom View Type 2 16
· ·
Schematic Type 2 • 17
· · · ·
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Top View Module Type No.3,
18
Bottom View Type 3, ,
18
· · ,
Electrical Values &: Part Numbers Type 3 •
19
Schematic Type 3 . · , · . · ,
20
· · ·
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Top View Module Type No, 4.
. · ,
21
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Bottom View Type 4
21
· · · · · . ··
Electrical Values
&: Part Numbers Type 4 .
22
Schematic Type 4 .
23
· · · · ·
Top View Module Type No.5.
24
Bottom View Type 5,
24
· · · ·
Top View Module Type No,"a.
25
Bottom View Type 6
25
· · ··
Top View Module Type No.7.
26
Bottom View Type 7. ,
26
· · ,
Elec;trical Values & Part Numbers Type 7 27
Schematic Type 7 ,
2B
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Top View Module Type No.8.
29
Top View Module Type
No.9.
29
Top View Module Type No. 10
30
Top View Module Type No.1 t
31
Top V;ew Module Type No. 12
32
Bottom View Type 12 , , 32
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Electrical Values &: Part Numbers Type 12
33
Schematic Type 12
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34
· · ·
Top Vi"" Module Type NO. 13
35
Bottom View Type 13 .
35
· · · . · . · ,

LIST OF ILLUSTRATIONS (CONrOJ
F.,,,, No.
3-34
3-35
3-35
3-37
3-38
3-38
3-40
4·1
4-2
4-3
4-4
Title
Schematic Type 13 • • . • • • • • . •
Top View Module Type No. 14 • • • • •
...
Bottom View TVpe 14. • • • • • • • •
Electrical Velue. & Part Number> Type 14.
Top View Module Type No. 15 •
Bottom View Type 15 ••••
Top Vie... Module Type No. 16
Testing Resiston: . . . ~
Testing Transistors . . .
Testing Integrated Circuits:
Substitution Tabje. . , .
Page
38
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41
42
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-I -
PRINCIPLES OF SHUTTER OPERATION
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The simplest explanation of the way aU camem
-work is: a certain
amount of Ught is allowed to
fal! on a photographic film for a certain amount
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of time. The amount of light is controUed by the
aperture (hole) in the camera shuuer. The amount
of time is controlled, in the 300 Series Polaroid
land Cameras. by a photocell (electric eye) and
-associated ele<:[ronic circuitry.
When a shutter
is operated. the film is expO$ed to light. and the
-Electronic Module measures the 'time
of exposure'.
thereupon permittingmechanical action to close
the
shutter after sufficient elapsed time.
-Since
the shutteB described in this manual are
almost identical. the following mechanical and
electrical sequences win apply to all of them,
A. MECHANICAL OPERA nON
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I. Four basic assemblies (Fig. 1~1) fonn the auto-
matic camera shutter: the aperture selector.
the opening blade,
the closing blade, and the
electronic module.
-CLOSING
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SELECTOR
{WliEfU
SLAOE
Af"fifnURE
/
ELECTRONIC 1C::::::::::l~
-MOOULE
FIG.1-1 BASIC SHUTTER MPONfNTS
2, The aperture seiectorcontrols tbe light enter-
ing the camera
at any moment: the opening
blade beg;ns the exposure. the
dosing bbde
ends the exposure~ and the electronic module
circuits regulate the length
of exposure time.
3. To operate. the shutter must first be co<:ked
'by depressing the cocking arm (Fig. I~J). As
the arm moves, it pulls the cocking slide, which
in turn, pulls the opening blade to its opernting
position. While
the opening blade moves. it
carries the closing blade along with it. When
the opening blade has been moved far enough,
a latch pin integral with it, forces the blade
latch down, until the pin passes a shoulder, on
the latch. As the pin slides beyond the latch
shoulder,
the latch snaps up, securing the pin
and holding both shutter blades in the cocked
position.

4. WhiJe the shutter is uncocked. the blade latch
holds the timing swilOh (S2) open (FiJI. I-n
Cocking the shutter causes the 5eCUring of the
latch pin, and thereupon the blade latch allows
the
sptill,ll-Ioaded timing.witch to close, an ac-
tion necessary to start electronic circuit functions.
TIMING
SWITCH
(S2)
A further push on thC' cocking arm Jatches it in
th~' .;o .... l.,eu pOSltion (Fig. 141.
~ Wh,'n <;.0 wcured. the ovef{ravel arm is butted
flrmh ;q:;.un<1I the shoulder of the cocking pin,
lD turn, !or':lng {he clOsing blade tightly against
Ih~ ;"vq'h~r ot the electromagnet. With the over-
IrJ\~'i.Jfnt Io.:k~u, the associated spring is.
~lr~·!,·huL AI thl ... pOInt. the shutter is c;;ocked:
Ih~' Itll"rlnl! 1,0,111 hl' .... omplcted by the return to
r\.·~l rn.,1l1<1ll nl Ill'.' ... trained spring.
{', ·lnpl'lll.!; J~'IHln 1;'q1. I-;;II~ begun by pushing
()'~ Ill, dlUU',r fv!l.':.!\I.' hutlOn. This is part ofa
~J~I,· ,j .... ~·!',r!: "'vll, 1mO Ih .... hody orth': Carn-
er;.;:. \\h,tfl tlw hUHnn I~ pt"L'SSCO. the shutter-
rd .... ..:,~' {l!" h lor..:.:o >1!';JlnSt the battery switc;;h
lSI j\.I<, .. II1~ It J110 tnpplnj! th~' ~Iidt; latch.
q(j'lfi~ SJ ~"Ompkh:<' the t:ircliit. operates the
<kdFIIll.":';!;,'l ~ 111'.:11 nllw !lokI-.. Ih" do\inf! blade.
ARM
"""""'"
.RM
SHUTTER
<:;;;Jf-- REt-EASE
8ATTliflY
SWITCH
IS"
MAGNET
BUTTON

- 7. When
the slide latch is tripped. the cocking slide
2. The mechanical action, of aU the Shutters
releases; as
the cocking slide returns to its rest
-position, a roller
contacts a tang on the blade
latch. and forces the blade latch down (Fig. l~).
This action, first: releases the opening blade,
-and
it snaps into position, aUowing light to pass
through, exposing the film; secondly, pennits
the blade latch to open switch 52. Opening 52
-initiates the electronic measurement
of the
amount of light and time to which the film is
being exposed. The photocell uses the average
scene light
to control the: flow of current through
-the liming circuit. When the proper time, de-
pending
on fUm selected, and aperture size, has
elapsed.
the magnet current is cut off. ThiS re-
leases the closing blade, which rapidly snaps back.
-and
shuts off the light, completing the mm
exposure.
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8. The above action also fires the flash gun when
(ine
is used_ The combination (Fig. lw2) of X~
- make.
X~break., X~contact, X--connecter, and
Rash saft':ty switches
controls the firing of the
flam.
B. ELECTRICAL ACTION
I, Electrical action is initiated. controlled, timed,
-and terminated by
the Electronic Module sub-
assembly
of the shutter. Mechanical action.
as previously described. is part of the overall
electromechanical action_ Switches
must first
be opened or dosed in predetermined sequence
in order to start the electric circuits functioning.
3
concerned here, is virtually identical. The ele<?
tneal action is aiso the same as far as basic pur~
pose is concerned: the time and quantity mea~
surements of light. But increasing sophistica~
tion of design, and employment of miniaturized
components, has led to the developmenl of
many different electronic modules.
3. Electrical
action will be described in detail with
respect
to the ultimate purpose of the circuitry,
but without concentration on the specifiC uses
of components. The following section (Section
Ill) wiJl present detailed information. including
identification,
and sufficient other data. to per~
mit field use of any Electronic Modules stOCked.
This
contributes to economical. customer repairs,
4. The basic eJectronic circuit is a two (2) rransistor
trigger:
it uses a photocell to control the length
of time that a small electromagnet is energized
(Fig. 1-5). Power for thecircuit illustrated (Fig. !w 7)
is obtained from a 4.5 volt bauery. Later modules
use a 3 volt type
power source.
5. Electrical
action requires the closing of switches;
S2 Grst~ and then, S 1. the battery power switch,
51 is closed by pressing the shutter release button.
When SI operates, power is applied simultaneous-
ly
to two (2) circuits: 1) the electromagnet hold-
ing circuit,
and 2) the capacitor by-pass circuit.
In
the first circuit, current flows from the battery
(Schematic Fig. 1-7) through
SI to one terminal
of the coil of the electromagnet M. and through
RI to the base of transistor Q2.
As the volta&e on the base of Q2 increases, the
NPN transistor turns on, because Emitter to
Base electronic current flow begins. With Q2
"on", current now flows through the coil of the
magnet M, completing this circuit and holding
the closing
shutter blade OPEN. See diagram.
Fig.. 1-8. for a representation of the described
current now_
In the by-pass circuit, current flows (Ft" 1-9)
from
the battery. through S I. photocelJ LDR. re-
sistor R6, and S2, to the other side of the battery.
This completes this
cjrcuit. and by-passes the com~
ponents noted on Fig. 1-9, just sO long as S2 re-
mains clOsed.

--------
S3 _
.A Ie -
He I R.
R.
L
------...:~R3
I
R.
+
R,
4JSV 1_
LOR
I 1'::=:- ~
..
'.
R7
FIG.1-7 SCHEMATIC 362 SHUTTER

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7. When 51 is closed, and the shutter simultan- components. Si.nce direct
current cannot flow
eously tripped, the blade latch opens 52. With through capacitors.
the function now changes
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S2 open. the timing circuit by-pass is removed,
to voltage, which charges the capacitor, or re-
and timing begins. Current now flows through sistor/capacitor
combination, selected by rotor
SI, photocell LOR, and the selected timing switch,
53, on the reverse of the aperture wheel.
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@-+
BATTERY
s,
FIG. '·a MAGNET HOLDING CI RCUIT
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BYPASSES TIMING CIRCUITRY,INCLUDING Cl THRU C4, R4· RS· R7· RS
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ttB-4
BATTERY
s,
S2
CAPACITOR BYPASS CIRCUIT
FIG. '·9 CAPACITOR HOLDING CI RCUIT
5
--.e.g
PHOTOCELL BATTERY