Polaroid SX70 manual Max

Page 29

AMBIENT

S1

S4 BC

S5

S3

 

 

 

 

 

 

End "Y"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Integration

 

 

 

S4 AC

20 to 35 ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S4 BC

S3

S5

EXPOSURE / PROCESS

OPERATION SEQUENCE

S9 opens when previous pack removed

S6 closed during the erecting mode

S8 closed until film cover ejected

Gears between front cover and gear train mesh as cover closes (3rd & 4th idler)

S7 closes during front cover closure resulting in dark slide ejection after a new pack inserted

S8 opens (counter set to 10)

CLOSED BY OPERTOR

Solenoid #1 power up

Shutter starts to close

Shutter close

S4 SWITCHES AC to BC

Cam rotates

Mirror released

OPENS

Motor braked

Cam stopped at 20° Electronic latch ON (S1 may be opened)

Mirror continue to rise

OPENS 26° 34°

Y delay activated

Mirror at rest

POWER RELEASED FROM SOLENOID #1

Shutter starts to open

S4 SWITCHES BC to AC

Starts integration ambient

Shutter at full open (f/8 16)

EXPOSURE COMMAND SIGNAL COMPLETE Solenoid #1 power up

Shutter starts to close

Shutter close

S4 AC/BC open

S4 SWITCHES AC to BC

Motor starts

Fresnel starts down

Cam moves from 20° position

Solenoid #1 power down

Mirror carrier starts to drive counter

CLOSES

CLOSES

Electronic Latch off Motor stops

(if S1 closed, Solenoid #1 remaing in power down)

Shutter opened (provided S1 is open)

Counter set to next position

FLASH

S2 → Closed if flash array inserted

S1T - 0

S4 BC max.ms 200

S5

Solenoid #2 power up (S2 closed) ms60

S3

Solenoid #2 power down

YDelay 40 ± 5ms

End "Y"

 

 

 

 

 

 

Flash delay FD circuit actived

 

 

 

 

 

delayFlash

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S4 AC

 

 

 

6.5ms51±

Switches power to falsh circuit (S2 closed)

 

 

 

20 to 35 ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Solenoid #2 back onf (power off) triggers FF circuit

 

 

 

 

 

 

 

 

 

 

 

FF

 

 

 

 

 

 

 

 

 

 

at the end of flash delay (FD); ST 2 shorted out; time

FLASH

 

 

 

out interval FT initiated.

25 to 34 ms

 

 

 

Note 1. No flash fire signal if:

FT

 

 

 

 

 

 

 

 

max

 

 

 

 

 

a- S9 closed (empty pack)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b- new pack inserted with array already

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ms

 

 

 

inserted (S8 function)

 

 

 

 

 

 

Note 2.

 

 

 

 

 

 

A 25 to 34 exposure results if the array

12

 

 

 

 

 

 

 

 

 

 

does not fire

 

 

 

 

 

 

 

 

 

 

 

Removes power from flash circuit

S4 BC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20° - pick starts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45° - spread starts

 

 

 

 

 

 

 

 

 

 

 

50° - pick stops and latches

 

 

 

 

 

 

 

 

 

 

 

130° - mirror starts to recock

S3

 

 

 

 

 

 

260° - spread stops

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S5

 

 

 

 

 

 

 

 

 

325° - mirror is recocked, pick returns

 

 

 

 

 

 

345°

 

 

 

 

 

 

Image 29
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 Introduction Power SourceLens Viewing and Exposing SystemViewfinder optics exposing Fresnel Figures 2-3 a and 2-3 BFresnel screen Mirrors ViewfinderFlare baffle Camera Elctronics 1. GeneralSX-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 TestConcave Mirror Distortion Check USE of Analysis ChartsFresnel Quality Check Collimation16 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