Polaroid SX-70 User Manual

When the release button is pressed, a switch S1 closes (Figure 1-11 A and B) and applies operating power to the shutter. As soon as pow

to an adequate level to hold the solenoid after the high-current circuit has completed the solenoid operating function and switches on the mot

mechanical device identied as the interceptor connected to the lens focusing mecchanism (Figure 1-13 A). the interceptor is moved as the

Figure 1-14 S5 being opened by the recock ram (Gear train)Figure 1-13 B Interceptor link, Solenoid 2, S2 operation - Solenoid energized

In cameras with «P» conguration or later shutter there is no ambient light measurement made. If a ash bar is in the shutter socket a ash picture wi

II - THEORY OF OPERATIONA general description of the camera and the sequence of its functions is contained in Section I. In that se

the subject passes through the camera lens and is reected by the viewing mirror (on the inside surface of the mirror cover) to the Fresnel viewing sc

The screen itself is a sheet of plastic upon which are impressed series of concentric rings much like the grooves pressed into a phonograph record

mirror, the 6-edges viewing mirror is used in the optical path twice. First, the light rays entering the camera from the taking lens are

The entire ECM (rather tna its individual integrated circuits) is used as a remplacement item. For that reason, the theory of operation an

Figure 2-7 S3 Being opened by recock ramc- Switch S3, normally closed at the begining of the exposure cycle is opened by the recock ram

Figure 2-8 S4 Switch operating congurationsdamage to the circuit in the event that ashbulb becomes short-circuited after it is red.e- Switch S5

Figure 2-8 A S8 - S9 Exposure counter switchesh- Switch S8 (Figure 2-8 A) is part of the exposure counter operated by the counter wheel. As S

mechanical coupling device set the exposure counter to the position just before the rst exposure and closed S8, but since S7 has r

k- If the operator has removed pressure from exposure button all power will be removed and the shutter blades will open to permit view

The following paragraphs describe the manner in which the mechanical components of the shutter respond to either manual or electrical direction.1. Whe

Figure 2-9 A Solenoid S2 operation2. When an ambeint light exposure is being made, all of the action just described takes place but does not

Figure 2-10 Spread roller systemThe basic theory of the lm processing method remains unchanged from previous Polaroid system. That is , th

partial pack : the top of the sheet of lm would be ejected as a dark slide and the counter would registrer «10». After the last actual sheet i

CLOSED BY OPERTORS4 SWITCHES AC to BCS4 SWITCHES AC to BCCLOSESCLOSESS1S4 BCS4 BCS4 ACEnd "Y"S5S3S3S5ST 2S1 T - 0S2 → Closed if flash array

I - DESCRIPTIONThe Polaroid Land SX-70 is a folding, pocket sized, single-lens reex camera which takes and immediately delivers full-c

III - TROUBLESHOOTINGThe Sx-70 camera is an electronically controlled device, the electronics being in the integrated circuits (IC) mounted i

SX-70 CMAERA REPAIR INSPECTION PROCEDUREA. FUNCTIONAL TEST1. Perform light leak test.2. Check focus and trim wheel torque.3. Check trim wheel reset ±2

Figure 3-2 SX-70 CollimatorFigure 3-1 Film pack simulator and power supllyCheckout the SX-70 camera requires the use of several pieces of test e

Figure 3-2 Typical collimation conditionsFigure 3-3 Location of new collimator targeta. Collimation of the Split Image Viewing System.NOTE

Figure 3-5 Disengaging the idler gear(2) Open the camera front cover slide the camera onto the horn of the collimator. Make sure that the c

(8) Look through the camera and observe the vertical line target. Compare the observed image with Figure 3-4 to determine if the camera is

b. Ambient mode exposure test(1) Place the S2 switch int he OPEN position. Set the voltage to 5.8 volts(2) Set the light level selector to the desired

more times. The READY and FLASH indicator lamps should sequence as in step 3.(6) On the ash simulator assembly, press and release the RESET button.(7

(4) Slide the camera fully onto the horn.(5) Select the light level desired on the Comparalumen and slide the horn up against the approp

camera in the mirror up picture taking position). (Both of these tests must be done in a darkened aera.)a. Static tests(1) Erect the camera and remove

The subject is viewed and focused throught the taking lens, a mirror, a Fresnel viewing screen (with spilt-image focusing aid) and a opti

Figure 3-10 Manual camera testerc. Install the ash simulator board into the camera ashbar socket in the same way as a ashbar would be inst

MANUAL FUNCTION TEST SEQUENCETest Mode Action Shutter ResponseS6/S7 Close S6/S7 Press and release S1 button to check for mechanical binding. Observe c

Figure 3-11 SX-70 Viewnder systemFigure 3-12 Installing the exit pupil gageViewnder quality refers to the general quality and alignment of the

Figure 3-14 Exit pupil imagesFigure 3-13 Aligning the exit pupil gage(3) The mounting rails for the gage must be ush with the eyelens f

Figure 3-15 Identifying distorted mirrors3. Concave Mirror Distortion Checka. Focus on a target which presents a clear vertical line (for e

Figure 3-16 Fresnel standards chartyou to a chart. In all cases, the fault analysis charts present the logical sequence of checks an

Figure 3-18 Flex circuit terminal locations1. Camera/Shutter IsolationTo expedite the repair procedure, it is essential that the malfunction be

Figure 3-19 Test points on SX-70 shuttersFigure 3-18 Testing instrument connectionsd. With the 1000 ohm resistor still in place, connect

IV - REPAIR AND ADJUSTMENTSThis section of the manual is primarily devoted to disassembly/reassembly procedures. These procedures provide step b

When the camera is fully opened, the interlock switch (S6), located at the left rear corner of the mirror cover, is closed and the bat

Figure 4-1 Front cover hinge studsFigure 4-2 Comparison of spread roll brackets(4) Close the front cover and recheck; bend further if nec

Figure 4-4 Comparison of decal before and after front cover closureFigure 4-3 Bending the stop latch

Figure 4-5 New spread roll conguration1. Interference BetweenFront and Bottom CoversA few cameras may have an interference t between the

Figure 4-6 Front cover light shield camFigure 4-7 Replacing light shield camWhen a new type shutter is installed, the cam in the light shield mu

Figure 4-9 Shutter mount retaining screws5. In the following step, the bottom cover will be removed. To prevent damage to the ex circuit, insert a

Thus, the cover must be fulled closed, the gears engaged, and the latch fully seated, in order to actuate the drive motor.As S7 closes, power is appli

shutter to initiate a series of events. The shutter blades close to cut off the optical path. The hinged Fresnel viewing screen is swung upwar

slide. The counter will start at number 10. Since switches S8 and S9 are physically attached to the counter, the camera will cycle throug

When through using camera it be can folded and latched in its closed conguration by pushing the erecting link. When the camera is closed