Polaroid SX70 manual Camera Analysis Charts, Test points on SX-70 shutters

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d. With the 1000 ohm resistor still in place, connect a jumper wire between the motor (minus TP9 contact) and the battery (minus TP1 contact) for a moment :

(1)If the motor runs, the MMC is defective.

(2)If the motor does not run, the motor is defective

e. Remove the jumper immediatly after determining the fault aera.

2.Camera Analysis Charts

Once familiarity with the system is gained, repair people can rely on the failure analysis charts to troubleshoot camera problems. When the charts lead you to a repair procedure, refer to Section IV, Repairs and Adjustments for the necessary

information. Set up the test equipment as shown Figure 3-18 Testing instrument connections in Figure 3-18. The film pack simulator is inserted

into the camera and the negative lead from the VOM is connected to camera ground through the power supply. This allows all the tests to be completed simply by moving the VOM lead as a probe from point to point. Figure 3-19 will assist you in locating the test points or terminals called out.

Figure 3-19 Test points on SX-70 shutters

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Contents Page Page General Description DescriptionOpening the Camera Camera OperationStarting the Automatic Mechanism Loading the Film packViewing and focusing Setting the exposure counterViewing and shooting Developing the print Exposures using flashCompleting the film pack Closing the camera Shutter Description Ambient Light Mode11 a Location & Arrangement of internal parts Shutter Description Flash Mode Page 14 S5 being opened by the recock ram Gear train Page Viewing and Exposing System Power SourceIntroduction LensViewfinder optics exposing Fresnel Figures 2-3 a and 2-3 BFresnel screen Camera Elctronics 1. General ViewfinderMirrors Flare baffleSX-70 Switch locations Switch functionsS3 Being opened by recock ram S4 Switch operating configurations Function Sequence Switch Function TablePage Flash Timing Sequence Chart Shutter, exploded view Shutter Mechanical Details FigureA Solenoid S2 operation Sequence of Operations Film Processing ComponentsPage Max Introduction Initial Tests III TroubleshootingSX-70 Cmaera Repair Inspection Procedure Test Equipment Operation Power supply and pack simulator FigureLocation of new collimator target Collimator FigureDisengaging the idler gear Comprehensive tester Comprehensive Testers -6Model B Camera tester Model B Camera Tester Light Leak Tester Figure Comparalumen Light Levels TableLight leak test system Flash Simulator Board Figure10 Manual camera tester Manual Function Tester FigureManual Function Test Sequence Exit Pupil Test Optical System13 Aligning the exit pupil gage Entrance Pupil TestCollimation USE of Analysis ChartsConcave Mirror Distortion Check Fresnel Quality Check16 Fresnel standards chart 18 Flex circuit terminal locations Camera/Shutter Isolation19 Test points on SX-70 shutters Camera Analysis ChartsPage Removal Front COVER/SPREAD Roll AssemblyInstallation Front cover hinge studs Repairs / Adjsutments Loose Front CoversBending the stop latch Replacing the Light Shield Cam Interference Between Front and Bottom CoversTop Spread Roll Looseness Front cover light shield cam Mirror Cover / Boot AssemblyBoot retaining screws