Pentax ASAHI SPOTMATIC 23102 Service Manual
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Pentax ASAHI SPOTMATIC 23102 Service Manual

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PRODUCT NO.23102
ASAHI PENTAX SPOTMATIC

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Summary of Contents for Pentax ASAHI SPOTMATIC 23102

  • Page 1 PRODUCT NO.23102 ASAHI PENTAX SPOTMATIC...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Page INTRODUCTION ASSEMBLY AND ADJUSTMENT OVERVIEW 1. ASSEMBLY AND ADJUSTMENT OF SHUTTER AND FILM TRANSPORT MECHANISM Shutter Curtains Parallel Adjustment of Shutter Curtain Edges Assembly and Adjustment of Selector Gear Parts Assembly and Adjustment of Film Transport Mechanism Assembly and Adjustment of Intermediate Gear Parts Assembly and Adjustment of Selector Gear Mechanism Assembly and Adjustment of Counter Dial Mechanism...

  • Page 3: Introduction

    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...

  • Page 4: Assembly And Adjustment Overview

    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.

  • Page 5: Assembly And Adjustment Of Shutter And Film Transport Mechanism

    1. Assembly and Adjustment of Shutter and Film Transport Mechanism a. SHUTTER CURTAINS (05062) Insert the 2nd curtain pinion shaft 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.
  • Page 6 23102 Page...

  • Page 7: Parallel Adjustment Of Shutter Curtain Edges

    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.
  • Page 8 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).
  • Page 9 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).

  • Page 10: Assembly And Adjustment Of Film Transport Mechanism

    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).

  • Page 11: Assembly And Adjustment Of Intermediate Gear Parts

    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.
  • Page 12 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).
  • Page 13 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).

  • Page 14: Assembly And Adjustment Of Selector Gear Mechanism

    f. ASSEMBLY AND ADJUSTMENT OF SELECTOR GEAR MECHANISM 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 15 (05010) should not touch the upper part of the top selector gear (05035). 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.
  • Page 16 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).
  • Page 17 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). Assembly and Adjustment of Slow Speed Governor.
  • Page 18 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. 23102 Page 17...

  • Page 19: Assembly And Adjustment Of Counter Dial Mechanism

    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.

  • Page 20: Assembly And Adjustment Of Rapid Wind Lever Seat

    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).

  • Page 21: Mirror Housing

    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.
  • Page 22 (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.
  • Page 23 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).

  • Page 24: Installation Of Mirror Housing To Body Proper

    (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).

  • Page 25: Assembly And Adjustment Of Coupler Gear Parts

    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.
  • Page 26 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).

  • Page 27: Adjustment Of Shutter Actuator Plate B (05140)

    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).

  • Page 28: Assembly And Adjustment Of X Synchro Contact

    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).

  • Page 29: Adjustment Of High Speed Exposure Timing (1/60 Sec-1/1000 Sec)

    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.

  • Page 30: Adjustment Of Slow Speed Exposure Timing (1 Sec-1/30 Sec)

    (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.

  • Page 31: Bonding Of Parts For Adjustment Purposes

    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) Bounce stopper adjust screw (05109) Set screw (Set T1.4 x 2) for curtain shaft rest f.

  • Page 32: Adjustment Of Synchro Contact Mechanism

    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.

  • Page 33: Adjustment Of Time Lag At Pp Contact

    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.

  • Page 34: Addendum: Exposure Meter Troubleshooting And Repair

    SERVICE MANUAL PRODUCT NO.23102 ASAHI PENTAX SPOTMATIC CAMERA HOW TO FIND FAULTY EXPOSURE METER AND HOW TO SERVICE IT DEFECTS: CAUSES: SERVICING: The voltage of the battery is 1. Replace the battery. getting low almost to zero. NOTE: The battery must not be less than 1.3V.
  • Page 35 DEFECTS: CAUSES: SERVICING: 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 e. Adjust the position of (05016) lever (01069) is pushed down, with tweezers so that it does the switch A (05016) remains...

  • Page 36: Service Memorandum 1: Ammmeter Installation And Adjustment

    Service Memorandum No.1 Product No.23102 (Spotmatic) (10001) Installation and Adjustment of Ammeter (12004) a. Fix the ground glass mask (02005), pentaprism and magnifier front element assembly (0-12005) to the prism seat (02001), if not already installed. (02001). b. Fix the ammeter (10001) to the prism seat c.
  • Page 37 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.

  • Page 38: Service Memorandum 2: Reflex Mirrot Problems

    Service Memorandum No.2 Product No.23102 (Spotmatic) Major Troubles and Causes of Malfunctioning Mirror. Mirror flips up only one third. Causes: Servicing: a. The mirror seat spring (02065) is weak. Replace (02065) b. The dia. lever joint spring (02119) is Adjust or replace (02119) too strong.
  • Page 39 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.
  • Page 40 DEFECTS: CAUSES: SERVICING: The voltage of the battery is 1. Replace the battery. Correct exposure cannot getting low; perhaps not to zero, be obtained, but is below 1.3V. NOTE: Faulty indication of the needle 2. Replace the ammeter. Pictures taken are either of the ammeter.
  • Page 41 DEFECTS: CAUSES: SERVICING: 3. The resistance values of CdS cell 3. Replace CdS cells. are inconststent. NOTE: How to check it: CdS cells are divided into three types and are wrapped Test whether or not the needle and supplied in envelope functioning of the meter is correct marked red, blue or white, with the Light Value Correction...
  • Page 42 DEFECTS: CAUSES: SERVICING: terminal plates (10029) Set the ASA scale on the shutter affixed to the variable resistor do speed dial at ASA 100 and the Even when the warning not make contact with the contact shutter speed at “B” and bend signal (the index of the piece (10032).

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