Pentax ist Service Manual
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PRODUCT No.27830    *ist 
           
           
                                                                                                                                                          PENTAX  Corporation 
Overseas Support Section 
 
06:03 S.M

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Summary of Contents for Pentax ist

  • Page 1                                                                                  ...
  • Page 2: Table Of Contents

    [ TABLE OF CONTENTS ] Page OUTLINE OF DISASSEMBLY AND ASSEMBLY ............... 2 DISASSEMBLY AND ASSEMBLY PROCEDURES..............2 1. EXTERNAL PARTS......................... 2 [CONF.] Function Check......................5 2. MAIN P.C. BOARD ........................5 [ADJ./CONF.] Photo Sensor Position ..................6 3. MAIN BODY AND FRONT HOUSING BLOCK..............10 3-2.
  • Page 3: Outline Of Disassembly And Assembly

    [CAUTION] Use an anti-static working mat and the wrist strap. [NOTE] Assemble the external parts in reverse order of disassembly procedures in accordance with “Note of assembly”. [Preparation] Remove the Eye cap F (for *ist) and Hot shoe cover F (for MZ-7, MZ-30). [Disassembly Procedures] 0-A412 A401 1-1.
  • Page 4 6) Discharge electricity of the main capacitor. -1. Peel off the BT (10x30) from the flash PCB. -2. Discharge electricity of the main capacitor with a resistor of 100Ω-1kΩ. Land of the blue lead wire (29 Xe+) on 0-Q2000 Hot shoe (A322) or Battery contact: Minus side (A34) BT(10x30) Fig.4 [Note of Assembly]...
  • Page 5 DT(7x5) 2)Disconnect a connector of 0-T200. 0-T200 3)BT (6x10) x2 [Note of Assembly] Brown The 4 lead wires of 0-A301 should be arranged Black as shown in Fig.12. The slack of lead wires should be arranged Blue between 0-Q200 and Main body. Green Fig.12 4) 5 Screws (Refer to Fig.13 and 15)
  • Page 6: [Conf.] Function Check

    12) Black lead wire (A330) 13) 0-A301 Black (A330) [Note of Assembly] Fig.19 [CONF.] Function Check [NOTE] This confirmation should be done before installing the external parts. [Required equipment] Regulated DC power supply, Circuit tester, Cable switch CS-205, Power adaptor (Refer to the table of Jigs, Tools and Testers) 1.
  • Page 7: [Adj./Conf.] Photo Sensor Position

    [ADJ./CONF.] Photo Sensor Position [Required equipment] Penlight or equivalent Pen-light 1) Make sure that the mirror is positioned at down condition. Sensor 2) Cover the eyepiece with a black tape. 3) Strike light by a penlight to the photo sensor as shown in the diagram right, and search the position where the pattern of the photo sensor can be seen on the mirror from Mirror...
  • Page 8 2) Peel off T94. 3) Loosen a screw, and then remove A17 with a black lead wire. After removing them, tighten the screw temporarily. 2-5. Upper Left Side 1) M11 [NOTE] Unhook the hooking part of M11 while moving in the direction of blue arrows in Fig.25. 2)...
  • Page 9 7) Peel off T94, and then pull out flexible board. Unsolder 3 lead wires (0-J201, 0-Q200). (0-J201) White Pink (0-Q200) Shielding wire DT(3x7) DT(3x7) DT(5x10) Fig.32 8) Remove 0-T100 from DT (3 places) as shown in Fig.32. 9) Lift up 0-T100, and then unsolder 4 lead wires (0-S250, B116, B118). Red (0-S250) Black (0-S250) Green (B116)
  • Page 10 2-10. Main P.C. Board (0-T100) 1) 3 lands on 0-Q200 2) TY-CNL-D1.4x4.0 (I400) Fig.36 3) Peel off 0-T100 where is fixed on the penta-mirror from DT as shown in Fig.38. Fig.37 Fig.39 Fig.38 Fig.40 [Note of Assembly] When installing 0-T100, stick 0-T100 on the Main body with care taken to the position indicated by arrow in Fig.39 and 40.
  • Page 11: Main Body And Front Housing Block

    3. MAIN BODY AND FRONT HOUSING BLOCK  [Disassembly Procedures] TY-CNL-D1.7x3.0 3-1. A141 1) TY-CNL-D1.7x3.0 (x2) 0-Q200 A141 2) A141 Black 3) M12 3-2. 0-Q200 1) 2 lead wires (Red, Black) 2) TY-CNL-D1.7x3.0 TY-CNL-D1.7x3.0 Fig.45 Fig.46 3-3. Main Body and Front Housing Block 1)...
  • Page 12: Conf.] Function Check Of Mirror Charging And Rewinding

    3-2. [CONF.] Function Check of Mirror Charging and Rewinding 1) [CONF.] Make sure that the planet gear arm assy should be placed at charge side as shown in Fig.54. planet gear arm assy. 2) [CONF.] Apply DC4V to 0-S250 with care taken to polarity ■...
  • Page 13: Front Housing Block

    4. FRONT HOUSING BLOCK  [Disassembly Procedures] 4-1. 0-O100 1) TY-CNL-D1.7x3.0 (x2), 0-O100 2) M2 (Bonded) Bond [Note of Assembly] Fig.59 When replacing 0-O100, peel off the scratch protection seal, and then stick O113 (Light seal O113 tape) on 0-O100 as shown in Fig.60. After 0-O100 is assembled, carry out the [ADJ.] and [CONF.] of [Assembly procedure] (p.17).
  • Page 14 4-5. 0-G100 [NOTE] Make sure that the mirror sheet should be placed at top end position. 1) Latch the lever (B) while pushing down the sliding TY-CNL-D1.7x3.0 TY-CSS1.7x3.0 plate (A) as shown in Fig.64. 2) 4 screws, 0-G100 3) Remove B7 while pushing down the spring (0-B9). 4)Remove 0-B8 while moving the lever (B11) to upward.
  • Page 15 4-7. 0-O170 TY-CNL-F 1) TY-CNL-F1.7x4.0 (x2) 0-O170 1.7×4.0 2) M14, 0-O170 (Remove adhesive) Super-X [Note of Assembly] Temporarily installation and position adjustment are required. 4-8. 0-L101 Fig.70 Loctite 1) Remove M7 upward. 2) Peel off M19 (SI black mat tape) and other light seal tapes. [CAUTION] Carefully peel off M19, because the TY-CNL-D SI prism is adhered behind M19.
  • Page 16: Conf.] Mirror Function Check

    [Assembly Procedures of Front Housing Block] [NOTE] Assemble the Front housing block in reverse order of disassembly procedures in accordance with “Note of assembly”. Carry out the following adjustments and confirmations after assembled until 0-O100 (section 4-1). [ADJ./CONF.] Front Housing Block 4-1.
  • Page 17: Adj./Conf.] Viewfinder Focus And Parallax

    2nd Mirror Position (standard and tolerance) (When using the Mirror positioning-scope: Refer to the Technical information No.T-128) Scale  NG: 0.8(Y) or over NG: 0.6(X) or over  1mm hole  (Standard)  Center of standard : Tolerance of 1mm hole : (X-axis = ±0.6, Y-axis = ±0.8) 4-3. [ADJ./CONF.] Viewfinder Focus and Parallax TY-CNL-D1.7x5.0 TY-CNL-D1.7x3.5 [Required equipment] Collimator, Focus master lens...
  • Page 18: Adj./Conf.] 0-O100 Position

    4-5. [ADJ./CONF.] 0-O100 Position [CAUTION] Note miss wiring, wrong polarity and short circuit, because the following 5 lead wires are soldered to 0-T100 directly. 1) Solder 5 lead wires to 0-T100. [60mm or more (x1), 160mm or more (x2), for power supply (x2)] 2)...
  • Page 19: Main Body

    5. MAIN BODY [Disassembly Procedures] [NOTE] Disassemble the Main body in reverse order of assembly procedures in accordance with “Note of disassembly”. [Assembly Procedures] 5-1. Other Parts A40, A34・A33(x3)・Black lead wires (x2) Right side: T64, A35・Red lead wire, A16・A9 ( Bonded together by Super-X) Rear side: A11, A18, A19 5-2.
  • Page 20 5-6. C1 (assy.) 1) DT (4x10) 2) C11 (Apply G134 to 2 places inside of C11.) [CONF.] Make sure that C11 should be dropped by self-weight. (NG: replace C12) Fig.93 3) C1, TY-CNS1.7x4.0, TY-CNL-D1.7x5.5 TY-CNL-D1.7x5.5 TY-CNS1.7x4.0 [NOTE] Fix the lower side of motor to A2 by DT (4x10). 4)...
  • Page 21 5-9. 0-T27 1) Stick on DT (4x4) to a hollow at the main body. 2) Stick on DT (3x7) to 0-T27, and then fix it to the main body. 0-T27 DT(4x4) DT(3x7) 5-10. D1 1) Apply G126 to shafts (2 places) of the main body. Fig.100 G126 D4・D5・D6...
  • Page 22: Top Cover

    6. TOP COVER [Disassembly Procedures] [NOTE] Disassemble the Top cover in reverse order of assembly procedures in accordance with “Note of disassembly”. L115 [Assembly Procedures] 6-1. Other Parts L115 A306, A339 and related parts M316 and related parts 6-2. A322 1) A321, A322 Fig.107 2) A330, CNL-D1.7x2.5, A348 (x2)
  • Page 23 6-6. A334 (0-T57) TY-CNL-D1.7x3.5 G151 1) Apply G151 to land of T57. TY-CNL-D 2) TY-CNL-D1.7x3.5、…x4.0 A334 1.7x4.0 0-T57 Fig.116 6-7. 0-A332 1) Apply G134 to clicking part of A335. 2) Pass the flexible board through the hole of A335 (Mode dial) and A334 as shown in the figures below, and then install 0-A332.
  • Page 24 6-10. Assembly of A358 and 0-T51 1) Stick DT (7x8) on T51. 0-T51 2) Fix 0-T51 to A358 while aligning the positioning holes with studs. 3) Apply the epoxy resin adhesives while clipping the switch and plate together, and leave them until they become hard. A358 6-11.
  • Page 25 6) Arrange 4 lead wires of 0-Q100, using care that they do not overlap each other. (Brown, Black, Green, Blue from left side in Fig.131.) 7) Q4, A349 (Apply screw-lock agent) 8) 0-Q5, LW10 LW10 0-Q5 A349 Fig.131 9) Set the flash unit pop-up condition, and insert 4 lead wires to under the Q4 approx.1mm to permit enough slack in wires, and then fix them by DT (5x10).
  • Page 26: Back Cover

    7. BACK COVER [Disassembly Procedures] 7-1. 0-A202 Remove 0-A202 while lifting up it from the film information window side. 7-2. A239 1) A187 (x4), A239 2) A215・A216, A217 7-3. A223 Fig.136 2 screws 7-4. A238 (0-T200) 1) 4 screws, A238 DT(5x5) DT(10x10) DT(6x20)
  • Page 27: Assembly Of Nain P.c. Board

    8. ASSEMBLY OF NAIN P.C. BOARD 1) Stick the following tapes. DT ・・・2 places, 8 places (the reverse)  PT ・・・2 places, BT ・・・2 places 2) Solder 3 lead wires (Red, Orange, Green) as shown in Fig.140. 3) Install I400 to 0-T100 by soldering 6 lands. 4) Cut off 2 places.
  • Page 28: Final Adjustment And Confirmation

    FINAL ADJUSTMENT AND CONFIRMATION 1. [CONF.] Static Current [Required equipment] Regulated power supply, Circuit tester, DC power adaptor (Hand made, refer to “Table of jig and tool” on p.40.) [CONF.] Set regulated power supply to DC5.5V (over 3A). Make sure not exist any shortage or leakage in the circuit.
  • Page 29: Conf.] Mechanical Back

    ③  The built-in flash should be retracted by finger. The built-in flash automatically retracts when the main switch is turned OFF. ④  By depressing the flash mode button, the flash mode should be changed. ⑤  Check the flash fired at the flash mode 6) AF function ① ...
  • Page 30: Conf.] Date Led Check

    Using the programmed software for 27830, check and adjust by following the flow chart. Standard flow of adjustment and confirmation: Product select menu (select *ist)  → 27830 test program → Main menu → Eeprom checking(START)→ Exposure adjustments(A)→ AF adjustments(B) → Eeprom checking(END)→ Main menu 5.
  • Page 31: Conf.] Af Check

    [Required equipment] Collimator designed for auto focus, Focus master lens [Preparation] Setting “Test mode” When attached a master lens that has not A position, *ist does not operate.  Therefore, set the camera to operate with the master lens at “Test mode” as follows: 1) Insert the battery into the body, and then turn ON the main switch. ...
  • Page 32: Technical Information

    TECHNICAL INFORMATION 1. BATTERY LIFE Type of batteries (pcs.) CR2 (2) *LR6 (4) Shooting condition\Degree 20℃/68°F -10℃/14°F 20℃/68°F Approx. Approx. Approx. Regular (No flash used) 50 rolls 30 rolls 75 rolls Approx. Approx. Approx. Flash photo (Flash 50%) 17 rolls 10 rolls 30 rolls Approx.
  • Page 33: Circuit Diagram

    3. CIRCUIT DIAGRAM 27830 -32/40-...
  • Page 34: 27830 Program Software Flow Chart

    27830 PROGRAM SOFTWARE FLOW CHART *****    27830  TEST  PROGRAM    *****    TURN MAIN SW OF BODY ON.  TURN SW OF I/O IF BOX ON.                  AFTER CONFIRMING ABOVE,         PRESS KEY [ 1 ]. AFTER REPLACING MAIN PC BOARD,  PRESS KEY [ 2 ]. [ 2 ]  [ 1 ]  AFTER REPLACING SHUTTER BLOCK  [ Y / N ] BATTERY LEVEL ADJUSTMENT  ( ‑‑‑> [ 6 ] ) [ Y ] [ N ]  SHUTTER SPEED ADJUSTMENT  ( ‑‑‑> [ 7 ] ) *****    27830  MAIN MENU    *****    EEPROM CHECKING (START)                ‑‑‑>  [ 1 ] EXPOSURE ADJUSTMENTS               (A) ‑‑‑>  [ 2 ] AF AND RELATED ADJUSTMENTS         (B) ‑‑‑>  [ 3 ] NUMBER OF REPAIRS                      ‑‑‑>  [ 4 ] EEPROM CHECKING (END)                  ‑‑‑>  [ 5 ] BATTERY LEVEL ADJUSTMENT               ‑‑‑>  [ 6 ] SHUTTER SPEED ADJUSTMENT               ‑‑‑>  [ 7 ] FOCUS INDICATION CHECKING              ‑‑‑>  [ 8 ] ***** EEPROM CHECKING (START) *****        ***** EEPROM CHECKING (END) *****            IF YOU ARE READY TO START,     PRESS KEY [ Y ]. IF YOU ARE READY TO START,     PRESS KEY [ Y ]. HEN YOU RETURN TO MAIN MENU,   PRESS KEY [ N ]. HEN YOU RETURN TO MAIN MENU,   PRESS KEY [ N ].        ...
  • Page 35 *****    MAIN MENU    ***** [ 2 ]  EXPOSURE ADJUSTMENTS *****     SELECT AE TYPE     *****           TYPE 1 ( LV6,8,10,12,16 )      ‑‑‑‑   [ 1 ]  TYPE 2 ( LV6,9,12,15    )      ‑‑‑‑   [ 2 ]   *****    27830   < A GROUP >   *****    BV ADJUSTMENTS                      ‑‑‑> [ 1 ] TTL FLASH QUENCH SIGNAL ADJUSTMENT  ‑‑‑> [ 2 ] MAIN MENU                           ‑‑‑> [ 3 ] *****   BV ADJUSTMENTS   *****  *****  TTL QUENCH SIGNAL ADJUSTMENT  *****      MOUNT F‑8 SET RING ONTO CAMERA.  MOUNT F‑8 SET RING ONTO CAMERA.  ATTACH LIGHT MEASURING MASTER LENS  ATTACH LIGHT MEASURING MASTER LENS  FOR LX WITH WIDE OPENED POSITION.  FOR LX WITH WIDE OPENED POSITION.  KEEP TURNING ON METERING SW OF CAMERA.      SET LIGHT SOURCE TO LV 8 (or 9).  SET LIGHT SOURCE TO LV 6.                ATTACH TTL ADJUSTING BACK COVER ONTO CAMERA. AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ].   WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ]. AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ]. WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ]. KEEP TURNING ON METERING SW OF CAMERA.  TTL QUENCH SIGNAL ADJUSTMENT HAS BEEN COMPLETED. SET LIGHT SOURCE TO LV 16 (or 15).      TTL QUENCH SIGNAL ADJUSTMENT AGAIN   ‑‑‑> [ 1 ] ...
  • Page 36 *****    MAIN MENU    ***** [ 3 ]    AF AND RELATED ADJUSTMENTS *****  AF ADJUSTMENT MAIN MENU  *****    CCD POSITION ADJUSTMENT                  ‑‑‑> [ 1 ]  AGC LEVEL ADJUSTMENTS                    ‑‑‑> [ 2 ]  MONITOR OFFSET ADJUSTMENT                ‑‑‑> [ 3 ]  UNIFORMITY ADJUSTMENT                    ‑‑‑> [ 4 ]  SATURATED OUTPUT AND TEMP ADJUSTMENT     ‑‑‑> [ 5 ]  FOCUS ADJUSTMENT                         ‑‑‑> [ 6 ]  MAIN MENU                                ‑‑‑> [ 0 ] *****  CCD POSITION ADJUSTMENT MENU  *****    CCD POSITION SQUARE ADJUSTMENTS     ‑‑‑> [ 1 ] CCD POSITION CROSS ADJUSTMENTS      ‑‑‑> [ 2 ]  CCD POSITION CHECK                  ‑‑‑> [ 3 ] CCD FOCUS ADJUSTMENT                ‑‑‑> [ 4 ] TO AF‑MAIN‑MENU                     ‑‑‑> [ 0 ] [ 1 ] CCD POSITION SQUARE ADJUSTMENTS            [ 2 ] CCD POSITION CROSS ADJUSTMENTS *****   CCD POSITION SQUARE ADJUSTMENTS   ***** *****   CCD POSITION CROSS ADJUSTMENTS   *****     MOUNT CCD ADJUSTING TUBE (SQUARE) ONTO CAMERA. MOUNT CCD ADJUSTING TUBE (CROSS) ONTO CAMERA.  SET LIGHT SOURCE TO LV 12.  SET LIGHT SOURCE TO LV 12.  SET FOCUS‑MODE SW OF CAMERA TO MF.  SET FOCUS‑MODE SW OF CAMERA TO MF.      AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ]. AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ]. WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ]. WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ].   *****   CCD POSITION ADJUSTMENTS   *****  *****   CCD POSITION ADJUSTMENTS   ***** ...
  • Page 37 *****    MAIN MENU    ***** *****    < B GROUP >   ***** *****    CCD POSITION    ***** [ 3 ] CCD POSITION CHECK          [ 4 ] CCD FOCUS ADJUSTMENT *****  CCD POSITION ADJUSTMENT  *****  *****  CCD POSITION ADJUSTMENT  *****  ** POSITION CHECK ** ** CCD FOCUS ADJUSTMENT ** MOUNT F ZOOM LENS 35‑80 ONTO CAMERA.    SET THE LENS TO MIN. DISTANCE (0.4M)   SET 2M CHART NO1.*  AND TELE END (80MM). SET 2M MASTER LENS.  SET LIGHT SOURCE TO LV 12.  SET FOCUS‑MODE SW OF CAMERA TO MF.  SET FOCUS‑MODE SW OF CAMERA TO MF.  SET FOCUS‑POINT‑MODE SW TO AUTO.      AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ]. AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ]. WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ]. WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ]. *: AF CHART NO1 *****  CCD POSITION ADJUSTMENT  *****  ** POSITION CHECK **               Positioning Chart No.1.  ...
  • Page 38 *****    MAIN MENU    ***** *****    < B GROUP >   ***** [ 2 ] AGC LEVEL ADJUSTMENTS    [ 3 ] MONITOR OFFSET ADJUSTMENT    [ 4 ] UNIFORMITY ADJUSTMENT                                                [ 5 ]  *****   AGC LEVEL ADJUSTMENT   *****                     SATURATED  OUTPUT      AND TEMP ADJUSTMENT  MOUNT FOCUS MASTER LENS ONTO CAMERA.  SET LIGHT SOURCE TO LV 12.  SET FOCUS‑MODE SW OF CAMERA TO MF. ...
  • Page 39 *****    MAIN MENU    ***** *****    < B GROUP >   ***** [ 6 ] FOCUS ADJUSTMENT                      *****   FOCUS ADJUSTMENT   *****    HORIZONTAL POSITION AND ADJUSTMENT ‑‑‑ [ 1 ]                   AF  CHART  NO1  HORIZONTAL ADJUSTMENT              ‑‑‑ [ 2 ]  VERTICAL POSITION AND ADJUSTMENT   ‑‑‑ [ 3 ]  VERTICAL ADJUSTMENT                ‑‑‑ [ 4 ]  AF‑MAIN‑MENU                       ‑‑‑ [ 0 ]                   AF  CHART  NO2  [ 1 ]                                                       [ 3 ]  [ 2 ]                                                       [ 4 ]    *****   FOCUS ADJUSTMENT   *****  *****   FOCUS ADJUSTMENT   ***** ...
  • Page 40 *****    MAIN MENU    ***** [ 4 ]NUMBER OF REPAIRS  [ 6 ]BATTERY LEVEL             [ 7 ] SHUTTER SPEED ADJUSTMENT             [ 8 ]                      ADJUSTMENT                                     FOCUS INDICATION CHECKING    *****   NUMBER OF REPAIRS   *****  *****   SHUTTER SPEED ADJUSTMENT   *****              * SET DRIVE MODE SW OF CAMERA  NUMBER OF REPAIRS = 0 ‑ ‑ ‑ > 1           TO CONSECUTIVE‑FRAME MODE.      IF YOU ARE READY TO START,       PRESS KEY [ Y ]. SHUTTER TESTER FOR 1/4000 SEC.     ‑‑‑>  [ 1 ] WHEN YOU RETURN TO FRONT MENU,   PRESS KEY [ N ]. SHUTTER TESTER (MODEL EF‑5000)     ‑‑‑>  [ 2 ]   MAIN MENU                          ‑‑‑>  [ 3 ] ‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑ NEXT OF EEPROM CHECKING (END)  ‑‑‑> [ 1 ]  1) SET CAMERA ONTO SHUTTER TESTER.  2) OPEN BACK COVER OF CAMERA.  3) DEPRESS BACK COVER KEY.  4) SET SHUTTER SPEED TO 4000  5) SET FOCUS MODE SW TO MF.  *****   BATTERY LEVEL ADJUSTMENT   *****  6) SET CUSTOM FUNCTION NO17 TO "2". (CF17‑2)       RELEASE SHUTTER SEVERAL TIMES.  SET REGULATED DC POWER SUPPLY TO 6 v.  READ SHUTTER SPEED.      AFTER CONFIRMING ABOVE,          PRESS KEY [ Y ].
  • Page 41: Jigs, Tools And Testers

    JIGS, TOOLS AND TESTERS Order No. Exclusive use for 27830 1. Programmed software for 27830 SLR soft for PC/AT (SF) No.95901-P276 2. 1 Mirror angle (47.5°) adjusting jig for 27830 -J136 3. Mirror angle adjusting jig for 27830 -J137 4. AF positioning jig (Square) for 27830 -M521 5.

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27830

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