NIKON F3 F3/Autofocus
Total Page:16
File Type:pdf, Size:1020Kb
Similar models: F3HP (High- Point), F3lT (Titanium body), NIKON F3 F3/Autofocus Batteries: 2ea 516 (negative ground) Fig. 1-bottom covers removed Fig. 2-decorator plate over ac- cessory shoe removed Fig. 3-rewind side top cover removed Fig. 4-wind side top cover removed Fig. 5-front view, covers removed Fig. 6-top wind side, back view Fig.7- top wind side, front view Fig. 8-front view, mirror box removed Fig. 9-mirror box, wind side Fig 10-mirror box, rewind side Fig. 11- FPC, front view rewind side Fig, 12-FPC, front view wind side, speed selector removed Fig' 13-top view wind side, speed selector removed Fig. 14-top view wind side, wind-gear assembly removed Fig. 15-top view wind side, in- complete gear removed Fig. 16-front view, FPC and wind-gear assembly removed Fig. 17- bottom view wind side, FPC removed Fig. 18-shutter block FiB. 19-top view, shutter block removed Fig.20- bottom view wind side, Travel time, second curtain C sprocket-gear assembly 45o mirror angle O removed Travel time, first curtain D Aperture lever height, Auto shutter speed, gain E released P* Fig. 21-test points, bottom of BC voltage F Counter FPC switch a Speedlight G fisoo (eccentric) R** Fig. 22-test speed points, Auto LCD, gain H %sso (spring position) S* selector Auto LCD, Ievel I Sprocket backlash T Fig. 23-wiring pictorial Manual shutter speed, shift T Auto shutter speed, shift K *The ADJUSTMENT LOCAIIONS: aperture-lever adjustment FRE, gain L with the shutter charged is the Brake, first curtain A Manual LCD M eccentric on the wind side of the Brake, second curtain B Delay time (Y56s) N mirror box (hidden by the release sPT IOURNAL/17 magnet in Fig. 9). **First adjust the spring position f.or r/roor. If the adjustment is in- sufficient, use the eccentric. ADJUSTMENT AND TEST VALUES Curtain-travel time: 10ms (32mm distance) Flange-focal distance : 46.5 t 0.02mm (flange to film- guide rails) FRE, free travel: The FRE should not move as you turn the diaphragm-setting ring from 1.4 to 1.6. The FRE should start mov- ing as soon as you turn the diaphragm-setting ring past 1.5. X-sync speed: /r, LCD turn-off voltage: The LCD should not appear if the appiied voltage is lower than 2.4-2.5V. Aperture lever, height: 3.1 + 0.1, -0mm, shutter cocked (measured between the bottom of the aper- ture iever and a horizontal line drawn through the center of the Iens-lock pin). Adjust with eccen- tric on wind side of mirror box. MULTIPLE. With the shutter released, the EXPOSURE COUPLER distance should be iess than 3.55mm. Shift the stop bar for adjustment. Sprocket backlash (free movement of sprocket teeth with shutter cocked): 0.4{.8mm. Adjust by loosening 3 screws on sprocket gear, Fig. 17 (T). Then turn the sprocket as far as it will go toward the take-up spool and tighten the 3 screws. Sprocket position: With the shut- ter fully cocked, a pair of sprocket teeth should directly face the back of the camera. To adjust, remove the setscrew and the pin screw at the bottom of the sprocket (from back of camera). The tube inside the sprocket has 4 holes. By chang- ing the position of the inner tube (the hole that receives the pin positions of the pin screw and is removed, you c6lrr disconnect screw), you can position the the setscrew for fine positioning the black wire from the counter sprocket. Advance the wind lever of the sprocket teeth. switch, Fig. 6. The camera will until one of the inner-tube screw then set auto speeds and holes aligns with a screw hole at readouts with the back open. ADJUSTMENT PROCEDURES: the bottom of the sprocket. Then Sequence: install the pin screw and check Note: To check LCD and elec- the position of the sprocket. If tronic speeds, wedge in the back- 1. Battery-test adlust incorrect, remove the pin screw sensing pin and advance to the Apply 2.45V to the battery and try a diJferent inner-tube "1-" position of the counter. Alter- terminals. Adjust F so the hole. You can also change the nately, iJ the wind-side toP cover shutter rvill release. 18/SPT IOURNAL Then decrease the applied voltage to 2.4Y; you should not be able to release the shutter electronicallv. If necessary readjust F. 2. %ooo %sr. should be within the range of 0.35-0.66ms. If not, recheck curtain-travei times. Adjust %r* by lifting aside the speed seiector (3 screws) and changing the spring position, Fig. 13 (moving the spring closer to the wind- lever end gives a faster mechanicai speed). The new- style shutter blocks has 6 not- ches rather than the 3 not- ches shown. If vou can't bring in 1/zooo using the spring position, use eccentric P, Fig. 13. 3. Delay time Check the manual /,oo; the speed should be within the range of 7.7-2.2ms.If not, ad- just N. 4. Auto shutter speed, gain Check the auto shutter speeds at high and low light levels (do not change the diaphragm opening). Adjust E so the exposure error is the same at both light levels. Note: Nikon recommends setting ASA 100 and fi8. Check at EV 9 and EV 14. Divide the exposure time at EV 9 by the exposure time at EY 14; the ratio should be 31.4-32.5ms. 5. FRE, gain Check the auto exposure at two diaphragm settings, large aperture and small aperture. Adjust L for the same ex- posure error at both settings (do not change the light level). 7.Auto LCD, gain Note the point where the Note: Nikon recommends setting The LCD should change the LCD just changes from ASA 100 and EV 9. Measure the "2000" exposure time same number of TV steps as to "1000." at f/11 and at fl2. c. Divide the the light level changes BV Check at EV 9. Rotate the exposure time at fltl diaphragm-setting ring with the exposure stops, the diaphragm-setting slowly time at f/2. from the largest aperture. The ratio should be 31.4-32.5ms. ring changes AV stops, or the film speed changes SV stops. Note the point on the 5. Auto shutter speed, shift diaphragm-setting ring where To check: Adjust K to correct the ex- the LCD just changes from ,,30,, ,,15,,, posure error noted in step 4. a. Set auto, ASA 100, EV 15, to maximum aperture. d. The fwo change points on Note: Nikon recommends setting b. Watch the LCD as you the diaphragm-setting ring f/5.6 and EV 9. Adjust for 50.2 turn the diaphragm-setting should be within I stop. -54.9ms. ring toward smaller apertures. That is, if in test (b) the LCD sPT IOURNAL/1e changes haifway between f/4 and t15.5, it should also change halfway between f/4 and f/5.5 in the second test (or within )( stop). Adjust with H. 8. Auto LCD, level Check at EV 15, ASA 100, f/8. Adjust I for a reading of l/soo. Note: Further adjustment of I may be necessary to assure the the LCD changes at precisely the proper point. To check: a. Turn the diaphragm- setting ring from fl8 to f.111; note the point on the diaphragm-setting ring where the LCD just changes from "500" to "250;' b. Rotate the diaphragm- setting ring from f/8 to f/5.6. Note the point on the diaphragm-setting ring where the LCD just changes from "500" to "1000." c. The two change points should require the same amount of diaphragm-setting- ring movement. If it takes more movement in (a) for the LCD to change, rotate I slightly clockwise. If it takes more movement in (b) for the change, rotate I slightly counterclockwise and repeat the test. 9. Manual LCD gain a. Set ASA 100, EV 15, 1/zooo, maximum aperture. b. Rotate the diaphragm- setting ring from the max- imum aperture and note the poht where the LCD changes from overexposure indication to proper indication. c. Set [e, EV 9, maximum aperture. d. Rotate the diaphragm- setting ring from maximum aperture and note the point where the LCD changes to phragm-setting ring is closer Note: Further adjustment of J proper-exposure indication. to f/5.6 before the LCD may be necessary to assure that e. The points in (b) and (d) changes), turn M clockwise. the LCD changes at precisely the should be within I stop. If in Turn M counterciockwise if proper point. LCD changes (d) requires more movement. @) the halfway To check: fi4 and f15.6, between it 10. Manuai LCD shift should also change halfway a. Rotate the diaphragm-setting between f/4 and f/5.5 in (d). Check at Ev 15, ASA 100, ring from f/5.6 to fl8. Note the Adjust with M. If.(b) requires l/tooo, f15.6. Adjust J so the point on the diaphragm-setting more movement (the dia- LCD indicates proper exposure. ring where the LCD changes from 2olsPT IOURNAL proper exposure to underex- posure indication. b. Rotate the diaphragm- setting ring from f15.6 to fl4. Note the point on the diaphragm-setting ring where the display changes from proper exposure to overex- posure indication. c. The two change point should require the same amount of diaphragm-setting ring movement.