PRODUCT NO.
TABLE OF CONTENTS Page INTRODUCTION 2 ASSEMBLY AND ADJUSTMENT OVERVIEW 3 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.
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.
ASSEMBLY AND ADJUSTMENT Note: 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.
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.
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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.
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).
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).
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 paragraph……of 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.
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).
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).
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. Assemble the high speed lever (0-05005) with the bulb lever (05007), and insert them again into (05050).
(05010) should not touch the upper part of the top selector gear (05035). (4) Assembly and Adjustment of the "cocked" Indicator The "cocked" indicator (05029) must be placed between the high speed cam (05219 or 05319) and the top selector gear retainer plate (05015). Adjustment in this connection should be made by properly bending (05029) with tweezers. Contact of (05029) with either (05019) or (05015) results in irregularity of shutter speeds.
(6) Assembly of Shutter Rest Plate Cock the shutter. Assemble the governor actuator rod spring (06015) and the governor actuator rod (06008), and insert them to the hole of the bottom shaft rest (05003). Assemble the pallet release rod (06009), the pallet release lever collar (06010) and the pallet release lever top B (06006), and insert them into the hole of the bottom shaft rest (05005) as in the case of (06008). Leave the screw (Set T 1.4 x 2.5) of (06010) loosened.
Two types of the high speed cam, (05219) and (05319), are available for critical adjustment of the shutter speed. Refer to Chapter 5, b. for use of these two cams. Apply “L-1” lubricant between (06008) and (06009); and between (05002), (05003) and (06002). (7) Assembly and Adjustment of Slow Speed Governor. Match the groove of the fan-shaped gear (07009) of the slow speed governor (0-07001) with the governor actuator stud (07011), and affix (0-07001) to the body proper (01001) with two screws (FM 1.4 x 2.
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.
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).
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).
Install the rapid wind lever (03003) onto (03034) and fasten it with the special tool 231 K-C 03-A. When (03003) is cocked with one single stroke, the part “B” of (03034) must not hit (03004), however, it may hit (03034) in sectional cocking. 2. Mirror Housing a. POINTS TO BE BORNE IN MIND WHEN MAKING ADJUSTMENT Assembly of the mirror housing is comparatively easy.
(2) When fixing the mirror seat assembly (0-02009) to the mirror housing (02002), the “A” part of the hinge cover (02011) as shown in the following diagram should not protrude or sink itself from the back of (02002), namely, the “B” part as illustrated in diagram 29, as the shutter curtains may jam with the “A” part. Adjust (02011) correctly with pliers, where required.
hanger A (02041) which is calked to (02018), give a stop to (02019). When thus stopped, the left side of the tip of (02020) should be positioned along with the scribed line on the side of the mirror housing (02002) or slightly more to the side of the picture-format than the scribed line. At the same time, the upper end of the tip of the mirror seat should hit on the bottom surface of the shelf of (02002).
(6) When the hook release lever (02087) is replaced with a new one, try to flip up the mirror seat quietly with your finger to check if (02087) will hit against the side of the mirror seat prior to hitting on the hook release stud A (02089). If it hits, file away (02087) for adjustment. (7) Check and maintain a proper clearance of such parts as the mirror actuator lever top (02018), mirror actuator lever bottom (02019) and actuator lever A.
3. Assembly and Adjustment of Coupler Gear Parts Install the coupler pinion (05039) on the 2nd curtain pinion shaft (05062), and fasten it with the coupler pinion screw (05112) with a screwdriver inserted through the cut at the back of the body proper. Rotate (05039) to such an extent as to facilitate this fastening while winding the wind-up lever. Assemble the coupler gear (05031) after cocking the shutter.
Fix the coupler lever (03013) and the coupler lever washer (03015) to the coupler lever shaft (03048). Insert one end of the mirror restitution spring (02066) into the hole of the mirror actuator lever bottom (02019), and put it on (03015). Fasten (03013) and (03015) with the coupler lever retainer screw (03049). Hook the other end of (02066) on (03013).
4. Adjustment of Shutter Actuator Plate B (05140) Timing in falling down of the shutter rod (05051) and flipping up of the mirror varies depending on how you adjust the shutter actuator plate B (05140) with set screw (Set F 1.7 x 3). Adjust to assure that the mirror seat (02009) flips up the instant the shutter rod (05051) is shifted, during its course of being pressed down, from its upper tapered part to its narrow straight part where it meet with the bulb lever (05007).
5. Assembly and Adjustment of X Synchro Contact Fasten the X contact seat assembly (05026) onto the body proper (01001) with two screws (FM 1.7 x 2.5). Insert two synchro cords (02081) through the bottom hole of (01001), solder one cord at the FP contact piece B (02024) and the other at the F? contact piece C (02025). 6. Adjustment of Shutter Exposure Timing a.
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.
(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.
e. BONDING OF ADJUSTING PARTS After adjustment of the high and slow speed exposure timing, bond the undermentioned parts with red lacquer to prevent possible loosening by vibration, etc. High speed lever adjust nuts (05111) 2 Bounce stopper adjust screw (05109) 1 Set screw (Set T1.4 x 2) for curtain shaft rest 2 f. INCONSISTENCY OF EXPOSURE TIMING If the exposure timing at the same speed setting differs after each shutter release, it is referred to as “inconsistency of exposure timing.
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.
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.
SERVICE MANUAL PRODUCT NO.23102 ASAHI PENTAX SPOTMATIC CAMERA - HOW TO FIND FAULTY EXPOSURE METER AND HOW TO SERVICE IT DEFECTS: 1. Even when the AM switch lever (01069) is pushed up to switch on the meter, the needle in the viewfinder does not move. CAUSES: The voltage of the battery is getting low almost to zero. NOTE: The battery must not be less than 1.3V. a.
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-). 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.
Service Memorandum No.1 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 3µA tester with the red and black lead wires of the ammeter (10001), respectively.
2) How to Adjust the 3µA Tester The 3µA tester must always function to discharge the rated 3µA current from its output terminals. Accordingly, before using it, check it to ensure the output of the rated 3µA current as per the following instruction. a. First, connect the red and black terminals of the 3µA tester with the red and black lead wires, respectively, as illustrated on the previous page. b.
Service Memorandum No.2 Product No.23102 (Spotmatic) Major Troubles and Causes of Malfunctioning Mirror. 1. Mirror flips up only one third. Causes: 2. Servicing: a. The mirror seat spring (02065) is weak. Replace (02065) b. The dia. lever joint spring (02119) is too strong. Adjust or replace (02119) c.
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.
DEFECTS: CAUSES: SERVICING: 1. The voltage of the battery is getting low; perhaps not to zero, but is below 1.3V. 1. Replace the battery. 2. Faulty indication of the needle of the ammeter. 2. Replace the ammeter. Correct exposure cannot be obtained, NOTE: Pictures taken are either extremely over-exposed or under-exposed. How to check it: Push down the AM switch lever (01069) to switch off the meter.
DEFECTS: CAUSES: SERVICING: 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.” 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.
DEFECTS: Even when the warning signal (the index of the shutter speeds) turns to red, the needle of the meter does not rest properly. CAUSES: SERVICING: The two terminal plates (10029) affixed to the variable resistor do not make contact with the contact piece (10032). 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).
