PRODUCT NO.23102

ASAHI PENTAX SPOTMATIC

TABLE OF CONTENTS

INTRODUCTION ASSEMBLY AND ADJUSTMENT OVERVIEW 1. ASSEMBLY AND ADJUSTMENT OF SHUTTER AND FILM TRANSPORT MECHANISM a. Shutter Curtains b. Parallel Adjustment of Shutter Curtain Edges c. Assembly and Adjustment of Selector Gear Parts d. Assembly and Adjustment of Film Transport Mechanism e. Assembly and Adjustment of Intermediate Gear Parts f. Assembly and Adjustment of Selector Gear Mechanism g. Assembly and Adjustment of Counter Dial Mechanism h. Assembly and Adjustment of Rapid Wind Lever Seat 2. MIRROR HOUSING a. Points to be borne in mind when making adjustment b. Installation of Mirror Housing to Body Proper 3. 4. 5. ASSEMBLY AND ADJUSTMENT OF COUPLER GEAR PARTS ADJUSTMENT OF SHUTTER ACTUATOR PLATE B (05140) ASSEMBLY AND ADJUSTMENT OF X SYNCHRO CONTACT
6. ADJUSTMENT OF SHUTTER EXPOSURE TIMING a. Adjustment of Bounce Stopper Mechanism b. Adjustment of Shutter Curtain Speed c. Adjustment of High Speed Exposure Timing (1/60 sec-1/1000 sec) d. Adjustment of Slow Speed Exposure Timing (1 sec-1/30 sec) e. Bonding of Parts for Adjustment Purposes f. Irregularity of Exposure Timing g. Adjustment of Exposure Timing at Various Positions of Picture Format 7. ADJUSTMENT a. b. 8. OF SYNCHRO CONTACT MECHANISM Adjustment of Time Lag at X Contact Adjustment of Time Lag at PP Contact
ASSEMBLY AND ADJUSTMENT OF SELF-TIMER
ADDENDUM: Exposure meter troubleshooting and repair SERVICE MEMORANDUM 1: Ammmeter installation and adjustment SERVICE MEMORANDUM 2: Reflex mirrot problems

INTRODUCTION

This Service Manual is prepared for servicing Product No. 23102-Asahi Pentax Spotmatic Camera-which is an improved model of Product No. 231. While no marked basic changes exist between Product No. 23102 and Product No. 231, changes mostly pertain to the following mechanical structures Sprocket Parts Mechanical Parts on Mirror Housing of Wind-Up Shaft Side A Part of Exposure Meter, and Other Minor Parts Consequently, with the exception of the aforementioned parts, this Service Manual will also apply to Product No. 231. Classification of Parts Numbers of Product No. 23102 Parts Number is composed of five figures. Of the five figures, the first two denote the mechanical structures which are classified as follows 01 Cover Plates and Back Cover 02 Mirror Housing and Prism Seat 03 Film Winding Mechanism 04 Film Rewinding Mechanism 05 Shutter Mechanism 06 Slow Speed Shutter Mechanism 07 Slow Speed Governor 08 Self-Timer Governor 10 Exposure Meter Mechanism 12 Optical Parts

ASSEMBLY AND ADJUSTMENT

Before assembling, disassembled parts need a careful washing and/or dusting with either a piece of cloth or a blower. General rules are summarized below: Parts equipped with rotating shafts and/or shaft bearings should be thoroughly washed with high quality gasoline or benzine. Especially, the parts lubricated with L lubricants need careful washing and drying. However, the pipes containing curtain springs and governor assembly should never be immersed in cleaning liquid for washing purposes. Exposed plated and anodized parts should be throughly wiped either with a brush or with a clean piece of cloth. When stains are found, lightly wipe off the stained parts with a clean piece of cloth soaked with liquid composed of ether and alcohol at the ratio of 60% and 40%. Painted parts need only be lightly dusted with a brush. Stains on the outer surface of black-finished cameras should be wiped either with a silicon cloth (similar to the one usually used for wiping glasses and is readily available on the market) or with the aforementioned liquid (60% ether and 40% alcohol). Wipe them very lightly so as not to erase the engraved white letters. For wiping optical elements, mixed liquid comprising 70% ether and 30% alcohol should be used. For this purpose, a clean piece of cotton or hemp cloth, properly washed beforehand and entirely devoid of starch, or a piece of soft paper is recommended. For wiping plastic parts (such as Fresnel and ground glass), use mixed liquid composed of 50% ether and 50% alcohol, which gives satisfactory results. Stained mirror surface should be wiped very lightly with a piece of cloth soaked with mixed liquid composed of alcohol and ether. Ammeters, CdS cells, variable resistors and semi-fixed resistors should never be washed. It is of utmost importance to observe the right kind of lubricants, lubricating positions and lubricant quantity. Lubrication should be in strict accordance with the attached list of lube oils, as wrong use of oil will invariably result in malfunctioning of various parts and may cause defects.
1. Assembly and Adjustment of Shutter and Film Transport Mechanism
a. SHUTTER CURTAINS Insert the 2nd curtain pinion shaft (05062) and pinion shaft collar (05135), one after another, into the top mec. plate (03001), and retain (05135) with the pinion shaft collar retainer screw (05136). Check if the clearance between the pinion shaft collar (05135) and the top mec. plate (03001) along the shaft direction is adequate. The pinion shaft will not rotate smoothly without an adequate clearance. Adjustment of the clearance should be made with (W6) washers. Ease the pinion shaft collar retainer screw (05136). Shift the pinion shaft collar (05135) downward. Apply (L-1) lubricant between (05062) and (03001) and then fix (05135) at its original position. Fix the bottom shaft rest assembly (05003) to the body proper (01001) with the mec. plate retainer screw (03072) and screw (SM 1.7 x 2.5). Insert the 1st curtain pinion shaft (05061) into the top mec. plate (03001). Insert the curtain shaft collar D (05076) and two 1st curtain wind shafts (05066) into (05061), and fix (05066) to (05061) with two pinion shaft retainer screws (05102). Insert the 1st curtain roller (05067) and then the 2nd curtain wind shaft (05065), around which the 2nd shutter curtain is glued, to (05062), and fix (05065) to (05062) with one of the pinion shaft retainer screws (05102). Insert the curtain shaft collar C (05075) into (05061), and (05067) and (05076) into (05062), respectively. Install the bottom ends of (05061) and (05062) into the respective holes of (05003), assemble (03001) with (01001), and retain (03072) with screw (FM 1.7 x 3). Check if the clearance of the 1st curtain pinion shaft (05061) along the shaft direction is adequate. Adjustment of the clearance should be made with (W6) washers, putting them between (05003) and (05075). Insert two 2nd curtain rollers (05068) and one curtain shaft collar A (05073) into the 1st curtain spring shaft (05059) to which the 1st curtain is fixed. Insert the other curtain shaft collar A (05073) into the 2nd curtain spring shaft (05060) to which the 2nd curtain is fixed. Insert (05059) and (05060) to the respective holes of (01001), and install the curtain shaft seat (05001) in (05059) and (05060) through the bottom of (01001), and retain (05001) with three small screws (SM 1.7 x 3). Screw one worm wheel (05040) to (05059) and another to (05060). Slowly rotate (05040) counter-clockwise 2 or 3 times with a screw-driver to tension the curtain springs. Install the worm (05041) in the hole of (05001) and gear it with (05040). Lightly screw two set screws (Set T 1.4 x 2) in (05001). Final adjustment of the curtain spring tension should be made when adjusting the curtain travel speed mentioned elsewhere.

b. PARALLEL ADJUSTMENT OF SHUTTER CURTAIN EDGES With the special tool 231K-E35-A, check if the 1st and 2nd shutter curtain edges (05023) are completely in parallel with each other at the center of the picture format. Also check if the edges (05023) are in parallel with the vertical lines of the frame of the format. If not in parallel, peel off either one of the 1st or 2nd curtain ribbons (05126) and (05127), and re-glue it correctly so that the edges are in complete parallel with each other. Note: When the shutter curtains are replaced, first install the pinions (0-05061) and (0-05062) in the camera body, and then glue the curtain ribbons (05126 & 05127), making sure that the curtain edges (05023) are completely paralleled.
c. ASSEMBLY AND ADJUSTMENT OF SELECTOR GEAR PARTS The relative position of the shutter curtains and the bottom selector gear (0-05036) should be determined after assembling (0-05036) with the high speed lever (0-05005), by gearing the 2nd curtain pinion (05038) with the bottom selector gear (0-05036), in the wound condition of the shutter curtains as illustrated in Diagram 3. The relative position of the 2nd curtain edge (05023) to the vertical lines of the frame of the picture format of the body proper (01001) should be checked with the special tool 231K-A01, E23-A. Apply L-1 lubricant on (0-05036) and (0-05062). Note: When resetting the shutter curtains to the uncocked position, do it slowly.
Insert the top selector gear (0-05035) into the selector gear shaft bearing (05043). As illustrated in Diagram 4, engage the top selector gear (0-05035) with the 1st curtain pinion (05038) so that the top selector gear stud (05085) of the top selector gear (05035) makes contact with the bottom selector gear retainer plate A (05012) of the bottom selector gear (0-05036).
Overlapping of the 1st and 2nd shutter curtain edges should be adjusted as illustrated in Diagram 5.
Assemble the top speed selector retainer (0-05045) and the shaft of (0-05035) with particular attention not to change the relative position of the top selector gear (0-05035) to (0-05036), and retain it with the selector gear shaft retainer screw (05098). This can be done easily when the shutter is not cocked. (Diagram 6)
Affix the counter dial actuator lever (0-03018) to the countor dial actuator lever shaft (03059), and the top 2nd gear (0-03024) to the top 2nd gear shaft (03041). Set the shutter curtains in the wound condition, and affix the stopper (03007) at a position where there is a clearance of approx. 0.2-0.3 mm between the stopper and the projected part of the top selector gear retainer plate (05015) and where there is a clearance of approx. 0.2 mm between the stopper and the outer periphery of (05015). After fixing (03007), turn the screw (Set F 1.7 x 4) on the back of the body proper (01001) until it reaches the side of (03007). Note: Do not force the screw (Set F 1.7 x 4) against (03007). Bond the screw with red lacquer through the back of the body proper (01001).

d. ASSEMBLY AND ADJUSTMENT OF FILM TRANSPORT MECHANISM First, put the sprocket collar (03058) and (W 30) onto the sprocket (03057-2) using grease G-1, the former at its top and the latter at its bottom. Install them in the body proper (01001). Then set (LW 13), (W 28), clutch ring (03095), speed dial knob retainer screw (05100) and sprocket spring (03089) onto the sprocket shaft (03054-2). Insert this assembled parts into the aforementioned sprocket (03057-2) through the bottom of the body proper (01001), and fix the bottom mech. plate (03002) onto (01001). Fasten the sprocket (03057-2) from its side with the sprocket retainer screw (03055-2), assuring that the tip of the screw go right into the long slot of (03095). While pushing the sprocket shaft (03054-2) from its bottom, rotate (03057-2) with your fingertip to check if it functions smoothly. Then push (03054-2) again from its bottom and rotate (03057-2) several times with your finger, after which lift your finger to check if (03054-2) remains recessed by dint of the functioning of the clutch but satisfactorily reverts itself to its original position once (03057-2) is again rotated. Assemble the spool (03009), top take-up spool brim (03010) and bottom take-up spool brim (03011) in one body, and install it in the spool chamber of the body proper (01001). Drop the wind-up shaft (03042) into the body proper (01001) through its upper hole and affix the wind-up shaft bearing (03043) to the body proper (01001) with small screw (SM 1.7 x 3.5) through the top mec. plate (03001). With the special tool 231 K-C 27-A, screw the bottom main gear (03027) clockwise onto the wind-up shaft (03042) through the bottom of (01001). When doing so, see to it that the wind-up shaft (03042) is retained intact with the special tool 231 K-C 27-A so that it will not rotate. While holding (03027) steadily with the special tool 231 K-C 26-A, fasten the top main gear (03026), turning it clockwise with the special tool 231 K-C 23-A. Note: Do not under any circumstances turn and fasten the bottom main gear (03027).
Slightly rotate the top main gear retainer screw (03044) clockwise with a screwdriver, and ease the force of your driver-holding hand, at which determine if the bottom main gear (03026) will revert itself steadily, say, by 2 or 3 cogs of the gear. As explained in paragraphof the Disassembly section, when the wind-up shaft parts are replaced, adjust the torque of the spool with (W 17) washers by carefully comparing it with the torque of the spooi of another Spotrnatic in good working order. e. ASSEMBLY AND ADJUSTMENT OF INTERMEDIATE GEAR PARTS Note Lubricate the intermediate gear shaft (05048) very slightly. If oiled excessively, it will invariably result in irregularity of the shutter speed. Do not lubricate the top intermediate gear (05033) or the bottom intermediate gear (05034).

Set the shutter curtain in the wound condition with the special tool 231 K-E 15-A. Turn the top main gear retainer screw (03044) with a screwdriver to position the teeth of the counter actuator dial (03021) as illustrated in Diagram 10.
Paying attention not to move the wind-up shaft (03042), assemble the bottom intermediate gear (05034) with (05048) so that the square hole of (05034) will fit the square groove of the intermediate gear shaft (05048), and the top 3rd gear (C 25) will engage with (05034) and the top main gear (C 26). Turn the non-return arm (03008) clockwise with the tip of tweezers, and check if (03008) is in contact with the side of the bottom part of the bottom intermediate gear (05034).

Page 10

By holding the bottom intermediate gear (05034) to prevent it from floating, turn the top main gear retainer screw (03044) clockwise with a screw-driver until the tip of the non-return arm (03008) drops into the bottom groove of the bottom intermediate gear (05034).
When the force of the screwdriver is eased, the bottom intermediate gear (05034) slightly revolves clockwise with the reversing strength of the wind-up shaft (03042) and stops when it hits the non-return arm (03008). Carefully install the spill (05030) in the square hole of the bottom intermediate gear (05034). Note: Be careful not to install the spill upside down. Slowly press the spill with the tip of tweezers to check if the spill goes up and down smoothly with the tension of the spill spring (05031). Then install the top intermediate gear (05033), placing it on (05034).

Page 11

If the groove of (05033), after installation, cannot be properly positioned even though the engaging position of the gear is changed, the groove of (05033) needs adjustment by filing with a fine file.
Place the spill recepctacle plate (05032) on the top intermediate gear (05033), and screw the intermediate gear retainer screw (05092-1) onto the intermediate gear shaft (05048). Pressing down the spill (05030) with the tip of tweezers, turn the 1st curtain checker arm (05008) counterclockwise as viewed from the top of the body proper, and release the shutter. Check if the spiil (05030) reverts itself to its original position when the force on the spill (05030) is slowly eased. Cock the shutter again, and repeat this to determine if the spill (05030) moves up and down smoothly.

Page 12

f. ASSEMBLY AND ADJUSTMENT OF SELECTOR GEAR MECHANISM (1) Assembly of high Speed Lever Parts After cocking the shutter, fix the bulb lever (05007) to the bulb lever shaft (05050). If the tip of the bulb lever (05007) hits the selector gear bottom retainer plate (05012), grind the tip of (05007) with a grindstone.

Page 16

If set screws (Set T. 1.4 x 2.5) are not properly fastened, (07003) may. hit (07008). Bond the set screw (Set T. 1.4 x 2.5) with Screw Lock bond.

Page 17

g. ASSEMBLY AND ADJUSTMENT OF COUNTER DIAL MECHANISM Insert the counter dial coupler lever shaft (03062) into the counter dial coupler lever (03017) to which fix washer (W 8), counter dial ratchet (03219, 03319 or 03419), counter dial ratchet spring (03082) and counter dial coupler lever collar (03063), in this order. Holding down (03063) with a screw-driver, hook (03082) on the counter dial ratchet stud (03077) of (03219, 03319 or 03419) with tweezers. With the tip of tweezers, rotate (03017). It should move smoothly. Keep holding down (03063), slowly rotate (03044) clockwise with another screw-driver, and one of the two cogs of the counter dial actuator (03021) starts gearing with the counter dial 1st gear (03030).
It is important that the two gears engage smoothly. If the gearing of the cogs is unsatisfactory, replace counter dial ratchet with a new one with proper size. For adjusting purposes, counter dial ratchet is available in three different sizes: (03219), (03319) and (03419).
While still holding down (03063), install the counter dial actuator lever collar (03060) and the counter dial actuator lever spring (03083) on the counter dial actuator lever shaft (03059). For easier installation, assemble (03059) and (03083) together before hand. Place the end of (03083) into a small concave inside the body proper.

Page 18

Slowly ease the force of the screwdriver holding down (03063). Do not free the screwdriver suddenly, or the parts will flip up with the tension of the counter ratchet spring (03082). Insert the rapid wind lever shaft (03039) into the counter dial 3rd gear (03032), and place this assembly on the counter dial actuator lever shaft (C 59), the counter dial coupler lever shaft (03062) and the rapid wind lever shaft seat (03064), and retain them with one rapid wind lever retainer screw (03073) and two small screws (SM 1.7 x 3.5). With tweezers, turn the tip of (03032), protruding from the upper end of (03039), counter-clockwise as far as it goes. While checking through the hole of (03039) the proper gearing condition of the cogs of (03032) with the counter dial 2nd gear (03031), slowly insert the edge of the back-cover into the groove of the body proper. If the cogs are not gearing smoothly with (03031), replace (03019) with one of a different size for readjustment. After replacement of (03019), check again if (03021) engages properly with (03030). Cock the shutter by turning (03039) counterclockwise with the special tool 231K-C22-A. Viewing through the hole of (03039), check if the engaged (03031) and (03032) advance by one notch with each shutter cocking. This confirms whether the counter dial travels by one notch with each shutter cocking. h. ASSEMBLY AND ADJUSTMENT OF RAPID WIND LEVER SEAT The top 1st gear (03022) requires no adjustment for positioning. Simply install it on (03039), and engage it with the top 2nd gear (03024). Fix the spring (03080) and two rapid wind ratchet springs (03084) to the rapid wind lever shaft (03034) in advance. Wind the spring (03080) around (03034), and hold it with your fingers. If (03084) is left simply hooked on the wind-up ratchet (03005), (03005) will invariably start turning towards the centre of (03034). To prevent this, (03005) must be positioned as illustrated in Diagram 26. Slowly insert (03039) into (03034) and put one end of (03080) onto the strap hook retainer screw (01054). Hold (03034) with your finger to prevent its reverse rotation with the tension of (03080). Insert (03084) into the groove of (03005). (03005) automatically engages with the wind-up ratchet wheel (03023) with the spring tension. When one tip of (03005) is engaged with (03023), the other tip should be between the cogs of (03023). This permits many sectional cockings for film advance and shutter cocking. See that the outside of (03080) is slightly in contact with the inside of the body proper when the notch A at the upper part of (03034) is positioned towards the lever stopper (03004) as illustrated in Diagram 27.

Page 27

Adjust the travel speed of the 1st curtain to be faster than that of the 2nd curtain by 0.05 - 0.1 ms. Adjust it as follows (1) Place the speed dial (05044) on the speed selector disc (05058) and set the speed dial at 1/1000 sec. (2) Measure the curtain travel speed. (3) Ease the two set screws (Set T 1.4 x 2) and rotate the worm (05041) clockwise to increase the shutter curtain travel speed; and counter-clockwise to slow it down. When (05041) is turned clockwise, slightly turn it counter-clockwise afterward. (4) Fasten the two set screws (set T 1.4 x 2). (5) Re-check the curtain travel speed.
c. ADJUSTMENT OF HIGH SPEED EXPOSURE TIMING (1/60 sec.1/000 sec.) (1) Measure the speed at 1; 1000 sec. (1 ms). (2) Ease the adjust nut (05111) with the special tool 225 K-F 48-A. Rotate the set screw (Set T 1.4 x 2.5) clockwise to increase the exposure timing; and counterclockwise to slow it down. Fasten (05111). (3) Re-check the speed at 1/1000 sec. At this stage, re-measure the curtain travel speed as explained in paragraph 5, b. If the travel speed is not within the tolerance, re-adjust it. (4) Check the speed at 1/125 sec. (8 ms). (5) If the speed is not within tolerance, adjust it as per 2) above.

Page 28

(6) Re-check the speeds at 1/1000 sec. and 1/125 sec. respectively. If the speed either at 1,/1000 sec. or 1/125 sec. is out of tolerance, replace the high speed cam (05219 or 05319). Two types of the high speed cam, (05219) and (05319), are available for adjusting purposes. The two types of the cam differ in shape. (05219) is designed for increasing the exposure timing at 1/1000 see, while (05319) is designed to slow it down. (7) Test and determine the exposure timing at five different shutter speed settings, viz., 1/1000 see. (1 ms), 1/500 see. (2 ms), 1/250 see. (4 ms), 1/125 see. (8 ms) and 1/60 see. (16.7 ms), respectively. If the exposure timing at 1/1000 sec. and 1/125 sec. is found to be within tolerance, the exposure timing at each of the other three shutter speed settings is automatically adjusted within tolerance. d. ADJUSTMENT OF SLOW SPEED EXPOSURE TIMING (1 sec. - 1/30 sec.) (1) Measure the speed at 1/30 sec. (33.3 ms). (2) Ease the adjust nut (05111), with the special tool 225 K-E 48-A. Rotate the set screw (Set T 1.4 x 2.5) clockwise to slow down the exposure timing; and counterclockwise to increase it. After adjustment, fasten (05111). (3) Re-check the speed at 1/30 sec. (4) Measure the speed at 1/8 sec. (125 ms). (5) If the timing at 1/8 sec. is out of tolerance, adjust as per (2) above. (6) Re-measure the timing at 1/30 sec. and 1/8 sec. respectively. By repeating the measurement and adjustment, adjust the timing within tolerance. Once the exposure timing at the above two shutter speed settings has been correctly adjusted, correct exposure timing at the other speeds, 1/15 sec. (66.7 ms), 1/4 sec. (250 ms), 1/2 sec. (500 ms) and 1 sec. (1000 ms), may be automatically obtained by means of the function of the slow speed cam (05020).

Page 30

REFERENCE Time of exposure usually refers to the time of exposure at the centre of the picture format.
7. Adjustment of Synchro Contact Mechanism
a. ADJUSTMENT OF TIME LAG AT X CONTACT From the mechanical construction of this camera, the synchro contact piece of the camera cannot be adjusted by viewing its contact condition. Therefore, necessary adjustment should be made by checking the contact condition with the synchro measuring unit of the shutter speed tester. Set the speed at 1/60 sec. and adjust by bending the X contact A (05024) with tweezers, with the shutter cocked. Standard over 0.5 ms

Page 31

b. ADJUSTMENT OF TIME LAG AT FP CONTACT Wind the shutter. Release the shutter while retaining the tip of the mirror seat (02009) with a finger. As the mirror seat has tension to flip up at this point, let it move up slowly while retaining it with the finger. See to it that the FP contact piece A (02023) hits the FP contact piece B (02024) at the instant the front upper end of the mirror seat (02009) comes to the center height of the hook retainer screw (02091), viz., when the upper end of the mirror seat is positioned approx. 3 or 4 mm lower than when it has completely flipped up. Adjustment in this respect should be made by bending (02024) with tweezers as illustrated in Diagram 33. A shutter speed tester may be also employed for this adjustment.
8. Assembly and Adjustment of Self-Timer
Fasten the eccentric collar (05106) onto the shutter rod (05051) with the eccentric collar retainer screw (05094). Move the synchro cord (02081) leftward as viewed from the body front, and fix the self-timer governor (0-08001) to the body proper with a small flat screw, medium, 1.7 x 3.5 and a small saucer screw, medium, 1.7 x 3.5. Set the shutter speed dial at 1 sec. Wind the shutter. With the special tool 231 K-H21-A, rotate the wind-up spindle (08021) counter-clockwise for over 90. Depress the tip of the release spring (08008) of the self-timer, and the self-timer begins to function. When the governor operation nears its end, the coupler lever (08005) presses down the aforementioned eccentric collar (05106), which then presses the shutter rod down. The reversion of the shutter rod may be considered satisfactory, if it reverses at about the same time when the 2nd curtain travel comes to its end at the set speed of 1 sec. This adjustment, if necessary, is made by turning the eccentric collar (05106).

Page 32

SERVICE MANUAL PRODUCT NO.23102 ASAHI PENTAX SPOTMATIC CAMERA
HOW TO FIND FAULTY EXPOSURE METER AND HOW TO SERVICE IT DEFECTS: 1. CAUSES: The voltage of the battery is getting low almost to zero. NOTE: The battery must not be less than 1.3V. a. The battery contact piece A (01017) in the battery housing (01034) fixed to the bottom cover is so bent that the battery does not contact (01017). SERVICING: 1. Replace the battery.
a. Raise the tip of (01017) with tweezers and position it properly.
Even when the AM switch lever (01069) is pushed up to switch on the meter, the needle in the viewfinder does not move.
b. The tip of the battery contact piece A (01017) in the battery housing (01034) is so bent (01034). laterally that it touches the inner wall of (01034). Tiny metal pieces ore in the battery housing (01034). NOTE: Tiny metal pieces are sometimes produced by wear and tear of screws due to repeated putting on or off of the battery cover (01035). d. Tiny metal pieces are attached to the battery circuit in the synchro terminal seat (01042), causing short-circuit.
b. Bend (01017) with tweezers and correct its position so that it does not touch (Refer to Figure l.a.) c. Clean the inside of (01034) thoroughly. (Refer to Figure l.a.)
d. Clean the synchro terminal seat (01042) thoroughly.

Page 33

DEFECTS:
CAUSES: NOTE: Push down the AM switch lever and check with a circuit tester if the battery contact piece B (01018) is electrically connected with the print wiring base (10004-).

SERVICING:

e. Even when the AM switch lever (01069) is pushed down, the switch A (05016) remains in contact with the switch B (05018). NOTE: Check in the same way as in the foregoing 1.d. 2. Broken or disconnected wire or Short-circuit inside the ammeter. NOTE: Unsolder the soldered point of the lead wire of the ammeter on the print wiring base (1004) to remove the-wire, and check with a circuit tester if the ammeter is in good working order.
e. Adjust the position of (05016) with tweezers so that it does not touch (05018) when the AM switch lever (01069) is pushed down. (in a state that the switch actuator pin(02095) is moved to the right as shown in Figure 1. d. 2. Replace the ammeter. NOTE: 1) No interchangeability between the ammeter for Product No. 231 and that for Product No. 23102. 2) If the ammeter is in good order when tested with a circuit tester, it must indicate approx. 3k.

Page 34

Service Memorandum No.1
Product No.23102 (Spotmatic)
Installation and Adjustment of Ammeter (10001) a. Fix the ground glass mask (02005), pentaprism (12004) and magnifier front element assembly (0-12005) to the prism seat (02001), if not already installed. b. Fix the ammeter (10001) to the prism seat (02001). c. Then connect the red and black clips of the 3A tester with the red and black lead wires of the ammeter (10001), respectively. Before doing this, however, it is important to check to assure-an output of the rated 3A current between the red and black terminals of the 3A tester as per the instruction given under 2) below. d. While viewing through the viewfinder, adjust and fix the ammeter (10001) at a spot where the tip of the needle of the ammeter (10001) comes to the centre of the notch as illustrated below. e. With the foregoing processes, the proper installation of the ammeter is complete.

Page 35

How to Adjust the 3A Tester The 3A tester must always function to discharge the rated 3A current from its output terminals. Accordingly, before using it, check it to ensure the output of the rated 3A current as per the following instruction. a. First, connect the red and black terminals of the 3A tester with the red and black lead wires, respectively, as illustrated on the previous page. b. Then connect the red and black clips of the lead wires to the minus (-) and plus +}) terminals, respectively, of a circuit tester which is capable of measuring 3A current. c. Watching the reading of the circuit tester, adjust the current of the 3A tester by turning the adjusting knob with a screwdriver until the circuit tester reads 3A If the reading is below the rated 3A, turn the knob clockwise: if it is above, turn the knob counter-clockwise. d. With the foregoing processes, the 3A tester now discharges the rated current. e. When not in use, be sure to switch off the tester. f. Use Mallory RM640, National M-N mercury battery or equivalent for the tester (the same one used for the SPOT Exposure Meter.) When the needle does not move when connected with the circuit tester, the battery may be considered as exhausted. Replace the battery. g. The switch of the tester will be on (or off) at a first push of the button, or will be off (or on) at a second push of the button, as the case may be. Therefore, push the button at least twice. In the event the needle does not move even at a second push, it is due to the exhaustion of the battery.

Page 36

Service Memorandum No.2
Major Troubles and Causes of Malfunctioning Mirror. 1. Mirror flips up only one third. Causes: a. The mirror seat spring (02065) is weak. b. The dia. lever joint spring (02119) is too strong. c. The mirror actuator lever top assembly (02018) and/or the mirror actuator lever bottom assembly (02019) are short-greased, or do not function satisfactorily because the components are too tightly fixed. d. The 2nd dia. lever (02015) is shortgreased. 2. Mirror does not flip up completely. Causes: a. The mirror actuator lever (02110) is filed excessively. b. The mirror seat (02009) is bent. c. The mirror shock absorber (02079) is misaligned. d. The mirror seat spring (02065) is too weak. 3. Servicing: Replace (02110) Replace (02009) Adjust or replace (02079) Replace (02065) Servicing: Replace (02065) Adjust or replace (02119) Re-assemble either or both assemblies.

Lubricate (02015)

The shutter curtains do not travel at the instant of mirror flipping up. Causes: a. The mirror actuator lever (02110) is inadequately filed. b. The mirror seat (02009) is bent. Servicing: Adjust (02110) Replace (02009)

Page 37

Points to be remembered when making adjustment.
1.b. Release the shutter at B. While pressing the shutter button, measure the pressure of the lst dia. lever (02029) with use of the tension guage, at the spot where the lever presses the dia. pin of the lens. The pressure should not exceed 320g, cm. In case the pressure is over and above this limit, the tension of the mirror seat spring (02065) would not be strong enough to flip up the mirror by winning over the tension of the dia. lever joint spring (02119). Therefore, when the pressure is over and above 320g, cm. , adjust the degrees of the angle of (02119) with tweezers or pliers to keep the pressure within the tolerance of 280g, cm. - 320g, cm. Remember that if the pressure is below 280g, cm. , the dia. coupling time would be unfavourably affected. l.c. When (02065), (02018) and (02019) do not function satisfactorily, the usual cause may be traced to an improper positioning of the hook of (02065). When (02065) is replaced, be sure to check carefully if the hook of (02065) is correctly positioned. Put your flnger on the tip of (02019) and try to tension (02065), and from the feelings of your finger as well as from the sound of the ports, you can find out if (02065) and (02019) are functioning well. 2.c. In case where the old type 4mm-wide shock absorber (02079) is used, shorten its width by lmm. Where required, cut off both ends of (02079) so that the entire shock absorber can be covered completely by the mirror seat. When the curtain actuator lever (02020) calked to (02018) does not attain its position when the mirror actuator lever top assembly (02018) stops its movement due to the flip- up of the mirror, file away the slanted port of the tip of (02110) that touches (02037). However, care must be exercised not to file away the port to on excess because if filed away excessively, it will result in incomplete flipping-up of the mirror.

Page 38

CAUSES:
1. Correct exposure cannot be obtained, NOTE: Pictures taken are either extremely over-exposed or under-exposed. 2.
The voltage of the battery is getting low; perhaps not to zero, but is below 1.3V. Faulty indication of the needle of the ammeter. How to check it: Push down the AM switch lever (01069) to switch off the meter. First, determine if the needle is in the off positbon when the camera is held at a right position. Then determine the exact off position of the needle by pointing the camera to different directions, viz., upward, downward, to the right and then to the left. See to it that the camera once reverted to and held at a right position before turning it to any other directions. When the camera is turned to any of these directions, the needle must always rest at the right off position. In the event the resting place of the needle varies each time the camera is turned, the ammeter may well be considered faulty.

1. Replace the battery.

2. Replace the ammeter.

Page 39

CAUSES: 3. The resistance values of CdS cell are inconststent. How to check it: Test whether or not the needle functioning of the meter is correct with the Light Value Correction Unit. Refer to Service Memorandum dated 5 October 1964 under the sublect Adapter for tight Value Correction Unit for Checking Spotmatic.
SERVICING: 3. Replace CdS cells. NOTE: CdS cells are divided into three types and are wrapped and supplied in envelope marked red, blue or white, according to the Sensitivity. The variable resistor (010008) is also divided into three types according to its characteristics. Thus, CdS cells and variable resistor marked with the same colour are combined and assembled as a unit. Consequently, when replacing CdS cells, use the CdS cells in envelope marked with the same colour as that painted on the side of the variable resistor (10008).
Also remember that the two CdS cells installed have to be replaced at the same time, as it is extremely difficult to determine which one of the CdS cells is defective. When installing CdS cells on the prism seat, see to it that the shorter lead wire come to the viewfinder sides, as illustrated. At present, lead wire of CdS cells is covered with a green coloured tube. However,CdS cells ore expected to be supplied in the future in tubes with red, blue or white colour according to the sensitivity.

Page 40

CAUSES: The two terminal plates (10029) affixed to the variable resistor do not make contact with the contact piece (10032).
SERVICING: Set the ASA scale on the shutter speed dial at ASA 100 and the shutter speed at B and bend (10029) with tweezers so as to make it contact with (10032).
Even when the warning signal (the index of the shutter speeds) turns to red, the needle of the meter does not rest properly. NOTE: When the index turns to red, the needle must drop to the () side beyond the off position.

Page 41