Similar models: F3HP (High- Point), F3lT (Titanium body), F3 F3/

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- 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 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. If (a) re- quires less movement than (b), rotate J slightlv clockwise. Rotate J slightly counterclockwise if (a) re- quires more movement. Then repeat the test. 11. Speedlight The SPD for light metering also serves as the sensor for shutting off the output. Adjustment G controls the flash-cutoff signal. To check, install an 18o/o neutral-grav card in the film position. Mount the SB-12 flash to the accessory shoe. Fire the flash at a neutral-grav test surface and measure the light at the film position with a flash meter. Adjust G for proper flash exposure.

OPERATING INSTRUCTIO NS :

1. Pushing the release button part way turns on ihe LCD. The LCD remains on for 16 seconds after you let up ihe release button. On auto, the LCD shons the shutter speed that rvill be automaticallv set. On manual, the LCD shot's the selected shutter speed rvith the letter "M." On "X," the LCD shovvs "80" (%o-the X-svnc speed). On bulb and time, the LCD shorvs the "M" n,ith the minus indication. 2. On manual, plus and minus LCD's indicate overexposure and underexposure. For pro- per exposure, both the plus pushing down the mechani- hold button depressed, the and minus LCD's show. cal release lever (front of LCD should not change. The Fuily depressing the release camera, toward bottom on exposure time remains locked button releases the mirror wind side). The shutter then until you iet up the memory- 1zio. electronically. Without bat- delivers hold button. teries, the shutter will not 4. The button in the center of 5. The LCD turns off when the release electronicaily. the mechanical release lever mirror starts to rise. The LCD However, you can release the provides the memory lock. turns on again lvhen the mir- shutter mechanically by On auto, with the memory- ror returns. sPT IOURNAL/21 6. The red button (top, wind side of finder mount) turns on a lamp to illustrate the LCD for low-light use. The iamp only turns on during the 16-second timer operation. POWER 7. The LCD also provides the battery test. If the LCD will SHUTTER *} turn on, the batteries are o.k. SWITCH 8. The power-lock lever (under the wind lever) opens a switch in the lock position. With the switch open, the LCD will not turn on and the shutter will not release electronically. fi" 9. The self-timer lever (under the speed knob) closes the self-timer switch to deiay the shutter release for 10 RELEASE 1012 seconds. During the self- SIGNAL (o -r timer delay, the LED at the tr) L front of the camera flickers. METERING The LED flashing frequency SIGNAL A vcc2 increases two seconds before the shutter reieases. 1013 10. The speed knob latches at the auto and X settings. z Depress the button at the toP QUARTZ Y of the speed knob to change x the setting. 11. The multiple-exposure lever (next to wind lever) va the sprocket for "o disengages ,a*', intentional double exPosures. When you cock the shuttel the multiple-exposure lever - COLLECTOR returns to its normal position. 12. With the camera back open, TRANSISTOR BASE 1022 the LCD reads only "80" at FIGURE 11 EMITTER the auto setting. The shutter speed is around 15ms until the counter reaches the "I' slower speed settings, the position. provide the camera Power. shutter deiivers the selected 13. Bulb operation is electronic, the motor drive oPens the shutter speed. but time is mechanical-a motor-drive switch at the bot- discon- mechanical latch holds the tom of the camera to BASIC CIRCUIT OPERATION: second curtain at time. To nect the camera batteries. close the shutter, turn the 16. The LED next to the LCD in- 1. The quartz oscillator turns on speed knob to another dicates flash charge through when batteries are installled. setting. the finder. The LED turns on VCC1 voltage appears at IC 14. The depth-of-field preview when the flash (mounted to "1013; the IC then provides and manual mirror-up con- accessory shoe) is charged. the 32KHz sine-wave signal. trols are at the front of the The LED flickers when the 2. Pushiirg the release button camera, wind side (top). film-speed setting is faster part way closes the Power Pushing in the depth-of-field than ASA 400. At auto, the switch to turn on transistor preview button stops down LCD shows "80" with the 1022, Fig.11. The VCC2 lhe lens. Pushing in the but- flash charged. The shutter voltage appears at the collec- ton and then turning the delivers the X sPeed (13.7 ' tor. The oscillator holds on lever raises the mirror. 18,1ms). At manual , the the VCC2 voltage for 15 15. With the motor drive install- shutter delivers Yss at the X seconds after the Power ed, the motor-drive batteries speed and faster. At the switch opens. 22lsw louRNAL J. The VCC2 voltage is applied to the LCD oscillator on the LCD board, Fig. 23, The LCD oscillator provides a 6V P-P square-wave signal, Fig. 3, that is common to one end of each LCD segment. The LCD now provides the metering indication. 4, The metering signal comes from IC 1012 when the VCC2 voltage appears, Fig. 11. The SPD at the bottom of the camera measures the light transmitted by the pattern in the mirror. Now the metering signal from IC 1012 charges the memory capacitor. An A- D converter in tC 1012 pro- vides the digital signai that drives the LCD displays. 5. When the A-D converter switches one end of a par- ticular segment low, that seg- ment blocks light (the square- wave signal appears at the other end of the segment). The segment then appears in the displa,v. 6. Pushing the relase button ful- ly closes the shutter-release switch. IC 1013 then provides the release signal (a pulse) to IC 1012. The positive pulse turns on a transistor in 1012. When the transistor turns on, the release capacitor discharges through the release magnet. The release magnet separates, and the mirror rises. Note: In early circuits, a tran- sistor on the B plate turns on when the shutter-release switch closes. Turning on the B-plate transistor causes IC 1013 to pro- vide the release pulse. The B- plate was eliminated in the revis- ed circuit.

7. As the mirror rises, the shut- ter switch cioses. The LCD timing rycle. capacitor. When the timing then turns off; closing the 8. The memory switch is a capacitor reaches the trigger shutter switch shuts off the solid-state switch inside iC voltage, it shuts off the shut square-wave signal to the 1012. When the shutter ter magnet to end the LCD. Also, one lead of the switch closes, the delay-time exPosure. shutter magnet (closing- capacitor chaqges and pro- 9. , When the second curtain curtain magnet) switches low. vides the signal that opens completes the exposure, it The magnet conducts current the memory switch to lock closes the closing

SWITCH LOCATIONS AND FUNCTIONS: 1. Power switch. Under the wind-gear assembly, Fig. 14. on the front plate then curtain. Closes when you push the separates, releasing the 4. Safety switch. Back of front release button part way (gray mirror. plate (part of shutter-switch wire to ground). Transistor Shutter switch. Back of front block). Connects the purple 1022 then turns on, supply- 3. ing VCC2 to the circuit and plate, Fig. 9. Closes when the wire to the gray wire when turning on the LCD. mirror releases, connecting the mirror releases. The X- 2. Release switch. Under wind- the yellow and orange wires. sync contacts, Fig. 1Z then gear assembly, Fig. 14. Closes One lead of the shutter connect to the flashcord when you fully depress the magnet then switches low terminal. release button (blue wire to routing current through the 5. Closing

SVVITCH AD}USTMENTS: 1. Film-advance completion switch. Check before installing the FRE. If the FRE is installed, disconnect the pink wire of the closing

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RELEASE CAPACITOR -l- FLEX CONNECTOR

MEMORY. HOLD SWITCH

FILM{DVANCE COMPLETlON SWITCH x-sYNc CONTACTS

3o/sPT IOURNAL P.C. TEFMINAL LCD BOARO o- z99 FINDER CONTACT nn-/vc"yE (AF) LCD ,/ oscrLLAToR /

DATA.BACK PIN MEMORY CAPACITOR lr_ ol-I II JI

OSCILLATOR CAPACITORS ;ooG

BATTERIES

sPT IOURNAL/31 14. Replace the multiple- area of the reflex mirror. This leads. The - lead should exposure couple4 Fig. 4. The area has a number of switch low when you fully square sides at the top of the through holes to transmit the depress the release button. multiple-exposure coupler light. To correct the exposure The release magnet then should be parallel with the problem with long lenses, releases the mirror. You can front of the body casting. Nikon provides a special mir- also check by shorting the - Tighten the setscrew at the ror with an increased number lead to ground; if the magnet front first; this setscrew fits of through holes. is o.k., the mirror will into the groove of the shaft. 4. If the counter is inoperative release. Check by turning the (returns past the start posi- 4. Shutter magnet. 3V VCC1. If multiple-exposure coupler to tion), the stopper end of the you release the shutter while the multiple

when the shutter switch lease switch; IC1013 then pro- shutter block, Fig. 18 (par- closes (mirror releases). A vides the release pulse to FA3-281). A new shutter ragged top section of the IC1012). The B plate is not block comes preadjusted trace indicates contact bounce needed with the new FPC. from the factory. or dirt in the shutter switch. The B plate is at the front of 4. Other part numbers: 7. Manual speeds do not agree the camera. To install the -take-up spool-FAL-582 with settings new-style FPC, remove the B -combination (release) Speed-selector Gray-code plate. Take out the red wire magnet-199 switches connected between the FPC -shutter switch-EA1751 and the B plate. Connect the -take-up gear unit (wind Check as described under blue wire from the release assembly)-FA2-381 "Switch Locations and Func- switch (formerly connected to -speed selector-FA2-201 tions." If you measure a high the B plate) to the FPC at the -sprocket-FA1-559 signal where you should red-wire position. -shutter (closing