Nikon F36 Motor Drive Camera User Guide

Chapter I. Introduction and Tools

Introduction
Several models of Nikola Motor Drive are now in use to work with each model of the Nikon camera. will provide a consolidated knowledge of servicing on the malfunction or working failures of the Iikoa Motor Drives ever introduced, except Model S-36 with two-core cord, whose production is quite limited and now discontinued. The same Model S-36 but with a three-core cord is dealt with in this manual, and for quick identification of both, see the attached comparison Table.S- 36 ( or S-72): For use on the! Tikona camera model SP,S3 or S3X F-36 : For use on the !Nikon camera model F or F-photonic F-250: This type holds a sufficient length of film for up to 250 exposures and is used on the Nikon camera mode 1 F. S-72 differs from S-36 in providing the graduation up to 72 on the exposure counter dial, for use on the Iikoa mode 1 S3)1. It can operate in conjunction with the camera SP or S3. Bote that in the same way, the Motor Drive S-36 can operate on the camera model S3H.Below is Cha . 2 – 6 essentials of repairing method of the Motor Dr. F-36, and in Chap. 7 and 8 important differences of the model S-36 and F-250 from F-36 will be described. For dismounting the Motor Drive, refer to the “Service Parts catalog” in which all the parts are shown by the order of the dismounting procedure.

Requisite Tools

As a power source needed for checking and adjusting the Motor Drive, use a dry cell or lead condenser, which supplies 7.5 –15V, o., Amp. D.C. An A.C. rectifier may also be usable. In this case, take care to keep the voltage drop within lV or so, for the reason that, when a current of 0.4 . All flows by a greater drop, difficulty may a.rise in 1111asure­ment of the voltage during the operation and too great influence may be exerted by each individual power source. It is also desirable to be able to vary the voltage.

1. n.c. voltmeter
   It is to permit measurement up to 15V.

2.  n.c. Ammeter
   It is to permit measurement up to about 1 Amp.
   (4f Terminals, switches, fuses, etc.

3. The same terminals as one used for the Motor Drive are necessary.

4. Furthermore, power source switches, fuses, etc. are to be arranged in the wiring as shown in Fig. 1 – 1, For connection of the terminal on the side of the Motor Drive, see Fig. 3 – 5. The plus(+) side should be connected to the Motor Drive terminal #330 and the minus (-) side to #336 and #340. Radio tester and megger (megohm tester)A radio tester such as usually used in a radio repair shop to examine conductivity. A megger, permitting measurement over 500V D.C. 20H

5. Tension tester Permitting current up to about 50g. Tools

6. Scrw drivers
   Besides a set of drivers, a double-type screwdriver such as illustrated in Fig, 1 – 2 is desirable.

7.  Pliers
   A pair of pliers, with pointed ends

8.  Tweezers
   A pair of tweezers

9. Soldering iron
   One with a long thin end suitable for work in a narrow place.

10.  Pin spanner
    With variable distance narrow pin type

11.  Punch and hammer

Chapter II. Derangements

Disorders or derangements which may be encountered most often and their causes are givon below. Part numbers are given according to the sei-vice Parts catalog except that three switches for successive exposure in the x-Assembly.y are designated as x-c Switches, five switches as x-s Switches, and three switches in the x-Assembly. switches.
Note that not only one, but also more than one disorder or derangement may often take place at one time. to be checked in the first place with respect to the use of the Jfotor Drive and power source are marked. the motor does work even when the Motor Drive has been connected to the power source and the release button s-c depressed.

Isn’t the exposure coater on the Motor Drive set at O?
Even though the power source itself indicates a sufficient voltage between the terminals, it often happens that, when it is connected to the Motor Drive for operation, the voltage falls suddenly to less than.

1.  Poor contact of the connecting cord with the terminal. (See Chap. 3 §1 – 1)
2. Disconnection deficient insulation in the inside wiring. (See Chap. 3 § 1 – 2)
3.  Poor contact at the N-switch (See Chap. 3 §l – 3 and Chap. 4)
4.  Poor contact at the M-C switch (See Chap. 3 §1 – 3 and Chap .. 4)
5.  Poor contact is caused by falling off of the contact material at each switch. (See Chap. 3 §1 – 3 and Chap. 4)
6.  Short circuit of the motor terminal to #241 (motor drive body) (See Chap. 3  1-4)

The power source, as soon as connected to the Motor Drive, gives rise to successive exposures even though the release button is not depressed, or these successive exposures once started don’t stop even after the finger is lifted up from the release button. Be sure that the connecting cord is inserted deep enough into the terminal.

1. Derangement in the H-C switch. See Chap. 4.
2.  False operation of lever #31 in the L-switch.
3. Poor contact in the M-S switch (not correctly returns). See Chap. 3 §1 – 3 and Chap. 4.
4. Disconnection ot deficient insulation in the wiring. See Chap. 3 §1 – 2.
5. Poor contact of the connecting cord with the terminal. See Chap. 3 § 1 – 1.
6. Successive exposures operate correctly but single exposure does not, or even though the s-c ring is set at s, it the enough into the terminal.
7. Poor contact of the x-s switch. See Chap. 3 §1 – 3 and Chap. 4.
8. Poor contact of the connecting cord with the terminal.
9. Successive exposures do not operate with a uniform speed
10.  Derangement in the 1-1witcb. See Chap. 4 -§4. (2rm Low efficiency of the motor. See Chap. 4 -§4.
11. The motor drive operates with its own release button, but the remote control cannot be operated.
12.  Be sure that no disorder is found on the side of the remote control device,
13.  Has the end of connecting cord been sufficiently inserted into the terminal?

Although the A-R ring on the camera top is set at R, the motor starts and keeps running when the c-s button on the Motor Drive is depressed. Incorrect fitting of the Motor Drive to §11. Other simple disorders. Chapter III. Repairing §1. Electric circuit As most of all the derangements or disorders a liable to take place in the electric circuit.i t, especially due to poor contact or deficient insulation at the switches, it is important to learn the circuit and adjustment of the switches, as described below in this Chapter and Chap. 4 respectively.

Terminal ( c-Assembly)
a. Poor contact of the terminal with the connecting cord. Most troubles in the terminal can be traced back to this poor contact. In the early stage of production ( up to the 300th series number) of the Motor Drive, the terminal was so constructed as shown in fig. 3 – 1 and likely to cause poor contact between the connecting cord and #338. An improvement has been made by inserting spring coil #338A as shown in Fig. 3 – 2, by so•what better but the not satisfactory result has been obtained. So the second improvement has been worked as shown in Fig. 3 – 3. As cord a in the makeshift, earlier open the products. select in the However trend s of more the recommendable to replace the terminal with one of the latest types by exchanging the part1 marked b. in Fig. 3 – 3. In assembling bend the spring part of #338 inward o. 3 – o. ,4mm to make it more elastic as shown in Fig. 3 – 4.

Deficient insulation
This deficiency in the terminal is likely caused by the loosening of nut #333 through the rotation of central spindle #332. Be sure that each pair of rotation stoppers #332 and #335, #335 and #338, #338 and #337, or #334 and

337 works effectively with each other. After assembling as shown in Fig. 3 –

3 tighten up #333, and thereafter, fix it with lacquer or by other adequate means.

Wiring
The circuit is as shown in Fig. 3 – 5. Here is shown a state after the shutter has been wound up.

•  Disconnection at soldered points in each switch unit at the terminals of the motor or on the Motor Drive terminal is liable to occur quite often. Repair with a little quantity of solder by using a small soldering iron so as not to affect other adjacent parts. As wiring cord7 a vinyl-covered cord with 13 lengths of inside w1res of 0.08mm thick stranded is used.

• Deficient insulation covering of the connecting wire breaks sometimes and the inside wire is brought into contact with 1111tal parts, Especially, the connecting parts of the
  M- Switch has only a small clearance against the motor attaching part #149 and is liable to contact, For replacement, the wire should not only be separated from the metal parts but also insulated using vinyl tape.

•  Switches Poor contact caused by dirt on the contact point The connecting points in almost all the Motor Drives which come back for repair are likely in the state to be cleaned. Therefore, make it a rule to clean the contact points of all the Motor Drives in the following way :

• Rub the contact surfaces several ti111Bs with quite a tine sandpaper. Or a •tal relay file (generally used for cleaning telephone relays) can be used.

• In any way, take caution not to file off too much or roughen the contact surfaces.

• The life of the contact metal is shortened by various factors, among which dirt or grease attached to the contact surface and insufficient contact pressure, which increases contact resistance, thus resulting in poor contact, should especially be considered. For this reason, in connection with the repairing of the contact parts, execute the following procedures by all means

Cleaning

• Before reassembling, clean the contact part with alcohol, benzine, and trichloroethylene so as to remove grease and dirt completely.
• For cleaning don’t use an agent other than those described above. Never use gasoline, which gives an injurious effect on the contact point.
• After cleaning, take care not to touch the contact point with your fingers or any tool.
• Retaining the definite contact pressure
• Keep the contact pressure not less than 5 g. For measurement use a tension gauge. See Chap. 1.
• Poor contact caused by falling off of contact 111Btal The contact alloy metal is spot-welded and falls off if it has not been worked well. For a makeshift, solder it. If possible, exchange the whole switch part (JI-Assembty or assembly). In this case, do not leave the contact metal fallen in the assembly, as it is liable to cause some troubles afterward. Take out the metal by all means.
• When the motor runs independently at.
• It so tilles happens that the terminals of the deficient insulation. correction of the attaching positions will suffice in most cases.

Chapter IV. Adjustment of Switches

1.  Before assembling each switch, clean the contact points and check the correct contact pressure as previously described. See Chap, 3 -§1. Then, proceed as follows:

2. Assembly
   If the tension of plate spring #50 among the three ones in the x-c switch is found too weak, bend it inward using pliers. For if it were too weak to touch plate #49 with sufficient, pressure at the moment of completion of winding, it would be subject to vibration, causing deficient contact and imperfect stop of motor running, thus successive exposures may be unavoidable.

3. Bend auxiliary plate #51 found inside of plate #50, so that the distance between the x-c switch and the contact points is about o. 7mm. See Fig. 4 – 1.

4. Check if, when the button in the I-S switch is depressed, #131 and #129 come in contact with #130B and #106A respectively, and when the finger is lifted up from
   the button, #131 in contact with #130 and then #129 with #130, or not. If the contacts do not occur in these orders, correct by bending #130B to get the clearance 0.4, LLM against #131, and then by bending #106A to get 0.211111 against #129. See Fig. 4 – 1.

5. N- and E-Assembly For the Motor Drives to be delivered since 1962 September N- and E-Assembly will be improved as described in Chap. 6. Here is the given repair procedure for the present type of Assemblies before the improvement.

6. The too-strong tension of contact plate #275 at the center of the N-Assembly is liable to cause the too-slow repeating speed of the successive exposure. If it is too weak, poor contact will result.

7. The correct contact pressure is about lOg.

8. It is recommended to make a depression at the end (b) of the plate, as illustrated in Fig. 4 – 2, by suiting pliers with curved ends, since the tension at portion (b) should be somewhat stronger than 10g at the portion (a) as described above so that the switch can be opened or closed securely by depressing portion ( b ).

9.  Adjusting the spring in E-Assembly

10. Removing large lever #274, fix piece #257 at the position where screw #268 on flywheel #255 comes just beneath. Then, revolving the flywheel about 3/4 revolution from the above position, engage the end of the large lever #274 to the screw 1/268.

11. Checking the operation of large lever #274 and of shutter releasing lever #273. See if both the levers have no great play and move smoothly during their movements
    which likely causes contact with other parts. If the large lever #274 shows too great play, its coupling to the screw #268 on the flywheel will be released, which hinders the E-Assembly from operating,

12.  Reassembling of switches For attaching each switch4 refer to the service Parts catalog

13. Adjusting switches after the Motor Drive has been titted

14. Adjustment or X-C switch Adjust the times at which connection and disconnection of the switch is performed (Fig. 4 – 3) by screwing in or out screws #34, after releasing nut #33 on lever #31 in the L-Assembly, so that wind-and-stop motion takes place positively at an operating voltage of 8V – 12V.

If nevertheless, the adjustment is not attained, that is, winning at 8V does not take place or successive exposures at 12V with no stop are unavoidable correct the distance of the M-C switch plates by bend! ng auxiliary plate #51. Take care,  not to bend the plate too much, which would cause\roich as short­circuit or others. The standard distance should be 0.7mm. After the adjustment, fasten nut #33a and apply lacquer for tightness.

Speed M2
The object of this adjustment is to make there12 quired seconds, for at 12 exposing v. 36 Since pictures the speed exactly M2 is in 11. 5 infl111nced- by essential form and height change of the bending switch, of it is a switch for this bend adjustment. portion b Thus of as #275 as illustrated shown by in Fig. dotted 4 – 4, upas line shown 1 by ft the line. switch fan as a whole repea·ting will speed be will more increase. effective The than latter the former slantwise parallels raising On the above contrary, procedure to by slow lowering down the speed, portion b properly.

Speed L
The object of this adjustment is to require eXPosing 36 pictures exactly in 18 – 20 sec. at 12 v. After finishing the above adjustment (1), Eke horizontal center pin #272 on the shutter releasing lever as shown in Fig. 4 – 5. Then, if the tension or the flywheel returning spring (#265) in the E-Asseltbly is made the speed will be lowered and vice versa. Consequently, the adjust•nt will be accomplished by changing the attached position of metal piece #257 by means of crew #258. If, however, this adjustment does not produce a satisfactory result, turn center pin #272.

Rechecking the speed J12
The above adjustment (2) will scarcely affect the speed of Jf2. If the need arises, readjust the speed M2 by the Mtbod ( 1).

Checking speed Ml
To make the 36 pictures 14. 5 – 15 seconds at 12V. The speed Ml will be determined by the adjus•nt of L and M2 speeds as a natural consequence. If it does not differ from the standard (14.5 – 15 sec.) to a great extent, let it go.

Uniformity in repeating speed of successive exposures
Even if the previous adjustments have been accomplished. uniformity in the speed may not always be obtained. This can be detected by the sound, and will be dm to the following three causes:

Low efficiency of the motor
Run the motor independently. If the current flows at about 0.05 – 0.1 Amp. 12V, the motor will be normal. Otherwise, replace the motor with a new one.

Defect in N-switch
If the end b (Fig. 4 – 2) of contact plate #275 in the N-switch is too weak to assure the correct functioning of the switch so as to maintain uniformity of speed, make a depression at the end of the plate as described previously. See Chap.

Incorrect positioning of the center pin on the shutter release the lever
The uniformity cannot generally be obtained due to too hard knocking of the shutter releasing lever #273 on the large lever #274. Change the position of the center pin After the adjustment applies lacquer to screw #40 for tightness.

Fitting to the camera
First, check if the Assembly (a part provided with a tripod socket) in the camera is the one that operates the Motor Drive or not. If it is not, replace it with the correct one. The bottom plate #243 can be identified by two boles as shown in Fig. 5 – 1 and a see-saw shutter release lever #202 inside.

Replacing the Q Assembly

• Unscrew 4 attaching screws and remove the bottom plate.

• Attach the correct bottom plate #243 with the 4 screws so that the end of the see-saw lever #202 comes, inside of the shutter spring plate in the camera. (Setting the A-R ring on the camera top to R will facilitate the work.)

• Wind up the shutter.1)orThen1 if the shutter is released by means of a narrow”inserted through the hole A in the bottom plate, the replacement is completed.

• Attach the Motor Drive to the  Too much vertical play between the Motor Drive and the camera will cause incorrect operation. To reduce the play, bend parts D of #157 and E of #292 as shown in Fig. 5 – 2.

• Adjustment of shutter releasing spindle #135 Once moves washer #137 at the end of the shutter release spindle #135. Lower the position or screw #136.
  Attach the Motor Drive and operate the shutter. If in this position the shutter is not released, raise screw #136 gradually up to the position where the shutter can be released positively.

• Choose washer #137 (0.3, 0.5, and 0.7mm thick are prepared) corresponding to the height of the screw determined above and insert it between screw #136 and release spindle #135. Fasten screw #136.

• Adjustment of spindle #28 in the A-R safety mechanism Push down spindle #28 on the Motor Drive, detached from the camera, with the finger. Set the c-s ring to
  S and depress the button. If, in this case, a clattering sound is heard and no rotation of the exposure counter takes place, the A-R safety mechanism of the Motor
  The drive itself is all right.

• On the contrary, if no sound is heard and rotation of the counter occurs, remove the A-Assembly and check the operation of lever #57 in the G-Assembly in the following way:

• 1\Y pushing the p spindle #28, the plate spring #56 should be raised and the lever #57 rotated by the spring #58, by which the rotation of the winding ap coupling spindle should be hindered by the end of the lever #57.

• Then, proceed to the same checking of the Motor Drive this time in conjunction with the camera with the A-R ring set at Rand the c-s ring on the Motor Drive being set at

• If the comet operation as described above is not attained, adjust the height of screw #136
  at the end of spindle #28 as described in Paragraph ( 1).

Che eking Items

1. Permissible vertical play between the Motor Drive and the camera.
2.  Dependable operation of every part and of every button, as well as click-stop action on the Motor Drive.
3.  correct operation of the single and successive exposures.
4.  Positive remote control from the battery case for single and successive exposures.
5. Zero return of the exposure counter at the sa1111 time with a stop of operation in cases (3) and (4).
6. Correct operation of the. A-R safety 1111chanis111.

Comparison Chart of Nikon Motor Drives

Type

|

Features

|

Identification by external appearance

|

Camera mode to be used

---|---|---|---

S – 36

Two-core cord

| Single exposure is operated by depress­ ing the shutter re­ lease button on the camera.| A chromium-plated p2rt is provided on the left­ hand of the front (front side toward you)

Change-over knob on the back has C (or K). L

|

S2.*   S3 and SP

SM3

S   –   36

S   –   72

( for 53M) Three-core cord

|

Single and successive are operated by dep­ ressing the button on the Motor Drive.

Remote control for single and successive exposures is possible by a simple electric device.

|

No such chromium plated part is provided.

Change-over  nob  on the back has three figures S,L,C

|

S2.*   S3 and SP

SM3

F – 36

Three-core cord

| Same as above. Repeating speed of successive exposures is changeable in

4 steps.

| Has on the lefthand front of the Motor Drive a engraved white F letter.

Has a repeating speed ad­ justing knob.

|

F

F  –     250

Three-core cord

| Same as above.

Permits loading 33 ft. (1/3 of 100 ft) length of film.

|  |

F

Remarks

|  |  |

*For S2 Wind-up part shoul be adapted

Type

|

Features

|

Identification by external appearance

|

Camera mode to be used

---|---|---|---

S – 36

Two-core cord

| Single exposure is operated by depress­ ing the shutter re­ lease button on the camera.| A chromium-plated p2rt is provided on the left­ hand of the front (front side toward you)

Change-over knob on the back has C (or K). L

|

S2.*   S3 and SP

SM3

S   –   36

S   –   72

( for 53M) Three-core cord

|

Single and successive are operated by dep­ ressing the button on the Motor Drive.

Remote control for single and successive exposures is possible by a simple electric device.

|

No such chromium plated part is provided.

Change-over  nob  on the back has three figures S,L,C

|

S2.*   S3 and SP

SM3

F – 36

Three-core cord

| Same as above. Repeating speed of successive exposures is changeable in

4 steps.

| Has on the lefthand front of the Motor Drive a engraved white F letter.

Has a repeating speed ad­ justing knob.

|

F

F  –     250

Three-core cord

| Same as above.

Permits loading 33 ft. (1/3 of 100 ft) length of film.

|  |

F

Remarks

|  |  |

*For S2 Wind-up part shoul be adapted

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