Functional Test; Operational Sequence - Polaroid Land SX-70 User Manual

SX-70 CMAERA REPAIR INSPECTION PROCEDURE
A. FUNCTIONAL TEST
1. Perform light leak test.
2. Check focus and trim wheel torque.
3. Check trim wheel reset ±2 teeth and front
cover to shutter gap.
4. Cycle camera 3 times at 5.0 and 6.4 volts
with power pack.
5. Focus camera at 8' - performe aperture test
(see specification sheet).
6. Ambient mode tracking at 3 lights levels
(note current drain) (see specification sheet).
7. Collimate at infinity.
8. Flash mode tracking at 10.4'' (see
specification sheet).
9. Check flash system
a. Flash sequence (with camera tester)
check counter rotation
b. Flash on zero.
10. Inner frame bow ( +.004 to +.011)
B. OPERATIONAL SEQUENCE
1. Check camera latching.
2. Erecting link (grinding).
3. Positive lock.
4. Check front movement and latch.
a. Check trim reset cam (correct cam and
condition).
b. Light shield (condition and movement).
c. Light piping seal.
d. Idler gear stacking.
e. Outpout gear slippage.
5. Check flash on dark slide power pack and
flash simulator.
6. Take flash pix at 10.4'', check premature
dark slide.
7. Check for dirty rollers and film catcher
spring.
C. FINAL VISUAL
1. Check optical path.
2. Fresnel cosmetics (per standards chart).
Split image.
3. Wafer and 3° eye lens.
4. Entrance and exit pupil position.
D. SHUTTER COSMETICS
1. Chrome
2. Lens conditions
3. S1 button and photocell conditon - trim
wheel decal.
4. S1 remote and flash socket condition.
5. Shutter mounting screws (missing or
loose).
E. CAMERA BACK
1. Shade blade condition (scratched -
distorted).
2. Shade blade movement (gap between
blades).
3. Concave mirror condition (color code
refurbished only).
4. Repair techs scribe (data and repair center
code).
5. Gear train cover.
6. Bottom cover window and condition.
7. Cable cover - cable camp - cable restrainer
(conditon-position).
8. Cable spring hook on.
9. Boot retainer tabs in place.
10. Cracked / broken hinges
11. Shutter hinge bracket pivots and gap
(.0125 max).
12. Leather and chrome cosmetics.
13. Set lens at infinity.
F. PICTURE EVALUATION
1. Baffle in pix aera.
2. Cracked / dirty taking mirror.
3. Incomplete coverage (front cover related).
4. Color code and FTC label (refurbished
camera only).