Service Manual

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SERVICE MANUAL

Summary of content (37 pages)

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SERVICE MANUAL
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3800 MX Disassembly procedure 1. Peel off Body coverings (A19 & A20) 2. Remove Bottom cover (A400), Connector seat (A34) and Tripod screw (All). CSS 1.7 x 2.2 x 3, CSM 1.7 x 3.5 x 2 3. Remove Top cover (A300) a.) Retainer screw (Left handed) Winding lever assembly (C300) Cover ring B (A329) b.) Shutter dial— ASA100, 1/1000 Shutter dial screw (E231) — 23800K-E321A Shutter dial assembly (0-E223), Hook pin (E228) Speed dial assembly (0-E229) c.
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9. P.C.board assembly (J500) — CNM 1.7 x 2.5 x 2 Base plate screw (A41-01) 10. Unsolder lead wires. 8 pcs 11. Mirror housing complete assembly (B000) a.) After loosening Screw (M75), disconnect Idle gear assembly (0-M74) and Supporter plate assembly (0-M53). b.) Remove Mirror housing complete assembly (B000) together with Prism seat assembly (0-M1), Penta prism assembly (0-L3) and Cell frame (J201). 12. Terminal contact assembly (0-J611) — CNS 1.7 x 2.5 13. Battery seat assembly (0-A8) — CNS 1.7 x 2.
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19. Pinion coupler gear assembly (0-C249) — CNL-E 1.7 x 2.5 20. Pinion coupler lever assembly (0-C254), (C257) (C 137) 21. Coupler lever spring (C266).Coupler lever spring hook screw (C214), Cord holder (J525). 22. Coupler lever assembly (0-C244), Coupler lever retainer screw (C248) — left handed. 23. Installing seat assembly (0-A508) — CSS 1.7 x 2.2 x 2 24. SW plate assembly (0-J521) — CNL-D 1.7 x 3.5 25. Bulb coupler lever spring (C263) 26.
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36. Winding shaft assembly (0-C19) 37. Restitution retainer lever (C22) a.) Supporter screw (C24) b.) (C22) c.) Restitution lever spring (C25) d.) Collar (C23) 38. Coupler pinion (E11) — Retainer screw (E12) 39. Reversing plate (E111) a.) C137 — b.) E111 — c.) E112 — W6 40. Intermediate gears a.) E107 — b.) E106 — c.) E104 — d.) E105 — e.) 0 E101 41. Hook plate (E153) a.) E154 — b.) E155 — c.) E153 — W1 Top 2nd gear assembly (0-C9) Top 2nd gear shaft retainer nut (C11) 231K-E111-A or 234K-B83-A 42. • 43.
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50. Coupler gear assembly (0-C222) Coupler gear retainer screw (C226) — left handed 51. Rewinding actuator lever assembly (0-C241) a.) CNL-B 1.4 x 2.0 b.) Spring retainer.(C243) c.) Rewinding actuator lever spring (C242) d.) 0-C241 52. Bottom mec.plate assembly (C200) a.) Stopper pole (C267) — CNS 1.7 x 2.5 b.) Coupler guide (C268) c.) C200 d.
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Assembly procedure 1. Bottom mec.plate assembly (C200) a.) Sprocket (C236) b.) Bottom mec.plate assembly (C200) — positioning with (C202) c.) C268, C267, CNS 1.7 x 2.5 2. Spool a.) Install spool (0-C20) and Spacer (C29) b.) Top shaft receptacle (C17-01) c.) Bottom shaft receptacle (C202) Vertical clearance of Spool is adjusted with W73 (t=0.5 or 0.6mm) d.) Idle gear (C264) 3. Rewinding actuator lever assembly (0-C241) As shown in Parts list 4. Coupler gear assembly (0-C222) — (C226) = left handed a.
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b.) When both curtains are wound and hooked with 1st curtain ratchet assembly (0-E135), adjust the clearance at 0.1mm between high speed.lever and Bottom selector gear assembly (0-E124) with turning Adjusting stud (E122). 8. Curtains overlapping After cocking the shutter, both curtains should be overlapping completely or within ± 0.1mm deviation. 9. Bounce stopper (E152) E152 — W3 — E145 — E146 10. Curtain stopper (E139) E139 — E140 — E142 — E143 — 23800K — E143-A — E147 11.
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b.) Bottom winding mechanism W16 — 0-C216 — C218 — W24 — C270 — C269 — C219 — C220 — C221 — C265 (left-handed) Caution; * W16 should be installed first separately from (C216), otherwise (C216) can not be installed together with W16. * When (C219) is installed, sprocket teeth should be positioned correctly as mentioned before. Perforation is adjusted definitely here. 15. Reversing plate (E111) and hook plate a.
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17. High speed lever assembly (0-E126) — 0-E126 — 0-E132 — E133 — E134 * After installing the above parts, 1st curtain ratchet assembly (0-E135) functions automatically. 18. X contact seat assembly (0-J621) — CNS 1.7 x 2.5 19. Self-timer (H100) — CNM 2.0 x 9.0, CNM 1.7 x 3.0 * Install self-timer pushing upper left. 20. Shutter actuator plate A assembly (0-A501) 0-A501 — A514 — 0-A502 — 0-A504 — CNL-D 1.4 x 2.0 x 3 21. Winding seat assembly (C100) — together with winding lever — Back cover open.
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22. Slow speed cam shaft (E401) E401 — E405 — LW17 x 3 — W70 * Up and down play of (E401) should be within 0.1mm. 23. Shutter seat plate assembly (E200) a) Cock the shutter b) Put on selector gear collar (E123) c) High speed cam assembly (0-E210) d) Install (E200) taking care of jointing part with slow speed cam shaft. 24. Bulb coupler lever spring (C263) 25. Switch plate assembly (0-J521) Main SW — CNL-D 1.7 x 3.5 x 2 * When installing it, take care of shortage or leakage to camera body. 26.
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30. Slow speed cam assembly (0-E402) a) Shutter speed at B b) Small rivet of (0-E402) should align straight with the center of (E401) and sprocket shaft as shown in Figure, and fasten Nut (E406) catching (E401) with pliers. Fasten set screws also. * When (E406) is fastened without catching (E401) with pliers, jointing split part underneath (E200) spreads with revolving power of (E401), and slower shutter speed will be affected. 31.Governor (G100) — CNM 1.7 x 2.0, CNM 1.4 x 2.
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34. Tv indication a) Shutter speed at 1/1000 b) Lower pulley of Pulley seat assembly (0-M76) should be in parallel with camera. c) Adjusting plate assembly (0-M68) — (M72) = left handed d) Restitution spring assembly (0-M62) — (A5) — (M85) * Turn wire 1 turn counter-clockwise around the pulley of (0-M62) * After installing (0-M62), Tv wire should not be loose. •If it is loose, give tension by moving (0-M68), but too much tension makes it harder to adjust the position of Indication plate (M61).
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36. Terminal contact assembly (0-J611) Soldering lead wires 8 pcs. 37. Shutter speed adjustment a) Curtain speed 12.2 — 12.3ms Same way with SP camera. b) High speed adjustment 1/1000 — 1/60ms Same way with SP camera c) Slow speed adjustment 1/30 — l sec 1 Loosen screw 2 Adjust with eccentric screw 3 Fasten screw 4 Apply red lacquer on screw 38. Shutter stroke — Shutter dial at B a) Install Top cover assembly (A300) and Winding lever assembly (C300) temporarily.
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1 2 3 4 41. Front board plate assembly (A100). Mechanical back Tv indication dial should be set just center portion of viewing finder. Tv indication (1000) should be set as shown in Figure. Three jointing gears (0-M53), (0-M62) and (0-M74) must function well.If they do not, adjust the position of Idle gear supporter plate (M73) with eccentric screw A Each figure of Tv indication must come in the center portion, adjusting eccentric screw B 45.46mm 42. Sv resistor assembly (J300) — (E208) 43. P.C.
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47. Light measurement a.) Temporary setting — Top cover tool, shutter dial, winding lever b.) Battery checker — VR A EV12, f8, 1/60, ASA100 2.6V Light off 2.7V Light on c.) Light measurement — VR B or VR C EV12, f8, 1/60, ASA 100, 2.8V When shutter dial is turned 1EV step (1/60 — 1/30 and A/60 — 125), and both red LED (over and under) light on, it shows within 0.1EV difference. d.) Confirmation of voltage reliability EV12, f8, 1/60, ASA100 When voltage is dropped down from 2.8V to 2.
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ASAHI PENTAX MX (23800) Curtain assembly 1. Curtain inspection Check if Aron-alpha is applied to curtain string as shown in Figure. Aron-alpha is applied to increase durability.Curtain string should be, bent parallel with shutter curtain. 2. Install 1st and 2nd pinion shafts (0-E2, 0-E7), (0-E118), (0-E108), (0-E135) and 2nd curtain assembly (0-E38) to Top mec.plate assembly (0-C1). 3. Install Top mec.plate assembly (0-C1) to camera body temporarily. 4. Give slight tension to 2nd curtain. 5.
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9. Install adjusting plate (E120) and other parts. Adjusting plate (E120) is installed after turning Top selector gear and Selector retainer (0-E118) to cocked position. 10. Install 1st curtain string to bobbin (E3). Confirm curtain overlapping and slit parallel, with adjusting the length of 1st curtain string.Aron-alpha is applied to curtain string and its retainer screw (CNS 1.4 x 1.6) after adjustment is finished, and cut the curtain string after turning around the Bobbin one time on the other way.
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LIST OF SERVICE PARTS Product No.23800 ASAHI PENTAX MX Note: 1. The parts with numbers starting ‘0-’ are assemblies. 2. 0nly available parts are listed below. Parts No.
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Parts No.
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Parts No.
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Parts No. Description Quantity A330-01 Window C 1 A332-01 Mask 1 A334-01 Pattern retainer 2 A335 Light seal 1 A336 Insulation tape 2 A400 Bottom cover (A401, A406) 1 A403 Bottom winding cap 1 0-A405 Battery cap assembly (A405, A406) 1 0-A501 Shutter rod assembly (A501, A505, A507) 1 0-A502 Release plate assembly (A502, A503, A506, A516) 1 0-A504-02 Shutter actuator plate A assembly (A504-02, A515-02, A516, CNL-D 1.4 x 2.
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Parts No. Description Quantity B51-01 Stopper screw 1 B53 Diaphragm actuator lever spring 1 0-B55-01 Mirror actuator plate assembly (B55-01, B56, B57, B58, B93) 1 0-B59 Mirror charge lever assembly (B59, B60, B61, B62, B63.
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Parts No. B111 B112 Description Quantity Light seal curtain Light seal curtain B 1 1 0-C1 Top mec.
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Parts No.
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Parts No.
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Parts No.
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Parts No. Description Quantity E231 Shutter dial screw 1 E401 Slow speed cam shaft 1 Slow speed cam assembly (E402, E403, E404) 1 E405 Spacer 1 E406 Nut 1 E407 Governor restitution plate 1 E408 Restitution plate shaft 1 E409 Restitution plate spring 1 G100 Governer 1 H100 Self-timer 1 J201 Cell frame 1 J203 Light metering lens 2 J204 Hot shoe contact 1 J205 P.C.board retainer plate 1 J206 Spring 1 J207 Mask 1 J208 P.C.
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Parts No.
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Parts No.
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LIST OF STANDARD PARTS Product No.23800 ASAHI PENTAX MX Small screws: Description Surface treatment Position of use Quantity Set T 1.2 x 2 Black nickel M62, M67 1 Set T 1.4 x 1.8 “ E402, E401 2 Set T 1.7 x 2.2 “ E40, E41 2 Set F 1.4 x 2.5 “ E129,E137 1 Set F1.7 x 3.5 “ A1 1 CNS 1.4 x 1.4 “ E113, E120 2 CNS 1.4 x 1.6 “ A506, A501 1E3, E37 1 2 CNS 1.4 x 2 “ G100, G201 1 CNS 1.7 x 1.5 “ A17, A1 2 CNS 1.7 x 1.6 “ C202, C201 2 CNS 1.7 x 1.8 “ C17,A 1 2 CNS 1.
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Small screws: Description Surface treatment Position of use Quantity CSS 1.4 x 3 Black nickel A143, A125 3 CSS 1.7 x 2 “ B11, B1 2 CSS 1.7 x 2.2 Nickel A401, A1 A301, A1 B103, B1 A508, A1 3 2 2 2 Blacknickel CSS 1.7 x 2.5 “ B9, B1 E201, A1 E201, C7 2 2 1 CSS 1.7 x 2.8 “ A202, A1 4 CSS 1.7 x 3 “ A2, A3, A4, A1 A302, A301 C26, C101 E40, A1 2 2 1 2 CSS 1.7 x 6.5 “ A302, A301 2 CNM 1.7 x 3.5 “ A11, A1 2 T-CSM 1.4 x 3.5 Nickel C304, C301 1 CNL-B 1.4 x 1.
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Small screws: Description Surface treatment Position of use Quantity CNL-F 1.7 x 1.8 Black nickel C264, C205 1 J201,B1 2 E229, E230 3 CNL-F 1.7 x4 CRSS 1.4 x 1.6 “ (PB-5) Washers: Description Material Thickess Position of use Quantity W1 0.07, 0.1mm 0.3, 0.4 M57, M60 E153, A1 1 1 0.1, 0.15 B83, B85 1 “ 0.3 A135, A101 2 Steel 0.3 E145, A1 1 Brass 0.15, 0.2, 0.25, 0.3 AS, M62 2 0.2 J501, A41 1 0.