Asahi Pentax MX Service Manual

SERVICE MANUAL

23800 /36917. High speed lever assembly (0-E126) — 0-E126 — 0-E132 — E133 — E134* After installing the above parts, 1st curtain ratchet assembly (0-E1

23800 /361022. 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 assem

23800 /361130. Slow speed cam assembly (0-E402)a) Shutter speed at Bb) Small rivet of (0-E402) should align straight with the center of (E401) and s

23800 /361234. Tv indicationa) Shutter speed at 1/1000b) Lower pulley of Pulley seat assembly (0-M76) should be in parallel with camera.c) Adjustin

23800 /361336. Terminal contact assembly (0-J611)Soldering lead wires 8 pcs.37. Shutter speed adjustmenta) Curtain speed 12.2 — 12.3ms Same way with

23800 /36141 Tv indication dial should be set justcenter portion of viewing finder.2 Tv indication (1000) should be set asshown in Figure.3 Three join

23800 /361547. Light measurementa.) Temporary setting — Top cover tool, shutter dial, winding leverb.) Battery checker — VR AEV12, f8, 1/60,

23800 /3616ASAHI PENTAX MX (23800)Curtain assembly1. Curtain inspectionCheck if Aron-alpha is applied to curtain string as shown inFigure.Aron-alpha i

23800 /36179. Install adjusting plate (E120) and other parts.Adjusting plate (E120) is installed afterturning Top selector gear and Selectorretainer (

23800 /36123800 MXDisassembly procedure1. Peel off Body coverings (A19 & A20)2. Remove Bottom cover (A400), Connector seat (A34) and Tripod screw

23800 /3622LIST OF SERVICE PARTSProduct No.23800ASAHI PENTAX MXNote: 1. The parts with numbers starting ‘0-’ are assemblies.2. 0nly available parts a

23800 /3623Parts No. Description Quantity InterchangeabilityA38 Connector retainer screw 1A41-01 Base plate screw 1A42 Spacer 1A43-01 Light seal curta

23800 /3624Parts No. Description Quantity InterchangeabilityA148-01 Restitution spring 1A149 Front board light seal 1A200 Back cover assembly 1 (A2

23800 /3625Parts No. Description Quantity InterchangeabilityA330-01 Window C 1A332-01 Mask 1A334-01 Pattern retainer 2A335 Light seal 1A336 Insulation

23800 /3626Parts No. Description Quantity InterchangeabilityB51-01 Stopper screw 1B53 Diaphragm actuator lever spring 10-B55-01 Mirror actuator plate

23800 /3627Parts No. Description Quantity InterchangeabilityB111 Light seal curtain 1B112 Light seal curtain B 10-C1 Top mec.plate assembly 1 (C1,

23800 /3628Parts No. Description Quantity InterchangeabilityC230 Clutch ring 1C231-02 Clutch ring retainer screw 1 23602-C14C232-01 Clutch ring retai

23800 /3629. P.C.board assembly (J500) — CNM 1.7 x 2.5 x 2Base plate screw (A41-01)10. Unsolder lead wires. 8 pcs11. Mirror housing complete assembly

23800 /3629Parts No. Description Quantity InterchangeabilityD10 Rewind shaft 1D12 Nut 10-E2 1st curtain pinion shaft assembly 1 (E2, E1)E3 Bobbin 2E

23800 /3630Parts No. Description Quantity InterchangeabilityE121 Adjustable plate screw 1E122 Adjusting stud 1E123 Selector gear collar 10-E124 Bottom

23800 /3631Parts No. Description Quantity InterchangeabilityE231 Shutter dial screw 1E401 Slow speed cam shaft 10-E402 Slow speed cam assembly 1 (E

23800 /3632Parts No. Description Quantity InterchangeabilityJ539 Adhesive tape0-J601 Synchro terminal assembly 2 (J601, 3602, J603)0-J611 Terminal

23800 /3633Parts No. Description Quantity Interchangeability0-M74 Idle gear assembly 1 (M74, M83)M75 Screw 10-M76 Pulley seat assembly 1 (M76, M

23800 /3634LIST OF STANDARD PARTSProduct No.23800ASAHI PENTAX MXSmall screws:Description Surface treatment Position of use QuantitySet T 1.2 x 2 Black

23800 /3635Small screws:Description Surface treatment Position of use QuantityCSS 1.4 x 3 Black nickel A143, A125 3CSS 1.7 x 2 “ B11, B1 2CSS 1.7 x 2.

23800 /3636Small screws:Description Surface treatment Position of use QuantityCNL-F 1.7 x 1.8 Black nickel C264, C205 1CNL-F 1.7 x4 J201,B1 2CRSS 1.4

23800 /36319. Pinion coupler gear assembly (0-C249) — CNL-E 1.7 x 2.520. Pinion coupler lever assembly (0-C254), (C257) (C 137)21. Coupler lever sprin

23800 /36436. Winding shaft assembly (0-C19)37. Restitution retainer lever (C22)a.) Supporter screw (C24)b.) (C22)c.) Restitution lever spring (C25)d.

23800 /36550. Coupler gear assembly (0-C222)Coupler gear retainer screw (C226) — left handed51. Rewinding actuator lever assembly (0-C241)a.) CNL-B 1

23800 /366Assembly procedure1. Bottom mec.plate assembly (C200)a.) Sprocket (C236)b.) Bottom mec.plate assembly (C200) — positioning with (C202)c.) C2

23800 /367b.) When both curtains are wound and hooked with 1st curtain ratchet assembly (0-E135), adjust theclearance at 0.1mm between high speed.leve

23800 /368b.) Bottom winding mechanismW16 — 0-C216 — C218 — W24 — C270 — C269 — C219 — C220 — C221 — C265(left-handed)Caution;* W16 should be installe