Polaroid SX70 manual Model B Camera tester

Page 36

Figure 3-7 Model B Camera tester

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 100 light level

(3)Slide the camera over the horn on the tester. The camera should go through the dark slide (S8) cycle. If not, remove the camera from the horn, determine the cause of failure, and correct the dark slide operation. If the camera cycles correctly, push the simulator flash plug all the way down into the flash socket.

(4)Read the current meter - it should read «0» after the dark slide cycle.

(5)Press the exposure button and hold it down while observing the exposure meter. The readings must compare to the specifications shown in the Standards paragraph at the end of this section. (When the exposure is released, the meters will automatically reset.)

(6)Observe teh BATTERY DRAIN meter. The reading should be according to specifications. This test applies only to the first exposure of series.

(7)Release the exposure button actuator. All of the meters will reset automatically.

(8)Repeat steps 5 through 7 twice ( a total of

three times). The exposure readings observeted must be within specifications.

(9)Move the light level selector to 6.25. Repeat steps 5 through 7. The reading must agree with specifications.

(10)Move the light level selector to 800. Repeat steps 5 through 7. All readings must agree with specifications.

(11)Recycle the camera by removing it from the horn and then reinstalling it on the horn. This is necessary for the next portion of the testing.

c.Flash Circuit and S9 Mode Test

(1)Set 5.0 volts on the tester voltmeter. Set light level at 6.25 and close S2.

(2)Press the exposure button. The numbere one READY lamp will go off and the number the number one FLASH indicator lamp will light.

(3)Press and release the exposure button four more times. The READY lamps should go off and the FLASH indicator lamps should light in numerical sequence each time hte exposure button is pressed.

(4)Press and release the RESET button on the flash simulator assembly.

(5)Press and release the exposure button five

Image 36
Contents Page Page Description General DescriptionCamera Operation Opening the CameraLoading the Film pack Starting the Automatic MechanismSetting the exposure counter Viewing and focusingViewing and shooting Exposures using flash Completing the film packDeveloping the print Shutter Description Ambient Light Mode Closing the camera11 a Location & Arrangement of internal parts Shutter Description Flash Mode Page 14 S5 being opened by the recock ram Gear train Page Power Source IntroductionLens Viewing and Exposing SystemFresnel Figures 2-3 a and 2-3 B Viewfinder optics exposingFresnel screen Viewfinder MirrorsFlare baffle Camera Elctronics 1. GeneralSwitch functions SX-70 Switch locationsS3 Being opened by recock ram S4 Switch operating configurations Switch Function Table Function SequencePage Flash Timing Sequence Chart Shutter Mechanical Details Figure Shutter, exploded viewA Solenoid S2 operation Film Processing Components Sequence of OperationsPage Max III Troubleshooting Introduction Initial TestsSX-70 Cmaera Repair Inspection Procedure Power supply and pack simulator Figure Test Equipment OperationCollimator Figure Location of new collimator targetDisengaging the idler gear Comprehensive Testers -6 Comprehensive testerModel B Camera tester Model B Camera Tester Comparalumen Light Levels Table Light Leak Tester FigureFlash Simulator Board Figure Light leak test systemManual Function Tester Figure 10 Manual camera testerManual Function Test Sequence Optical System Exit Pupil TestEntrance Pupil Test 13 Aligning the exit pupil gageUSE of Analysis Charts Concave Mirror Distortion CheckFresnel Quality Check Collimation16 Fresnel standards chart Camera/Shutter Isolation 18 Flex circuit terminal locationsCamera Analysis Charts 19 Test points on SX-70 shuttersPage Front COVER/SPREAD Roll Assembly InstallationRemoval Repairs / Adjsutments Loose Front Covers Front cover hinge studsBending the stop latch Interference Between Front and Bottom Covers Top Spread Roll LoosenessReplacing the Light Shield Cam Mirror Cover / Boot Assembly Front cover light shield camBoot retaining screws