User manual PENTAX ME F

[. . . ] Bottom cover assembly (A400) -- CSS 1. 7 x 2. 8 x 3 Connector seat (A23), R button (C117) 5. Winding lever assembly (0-C69) Cover screw (C139) -- 23600K-C135-A (left handed) Winding lever nut (C8) -- 23600K-C134-A2 Cover ring (A321) 6. Shutter dial Shutter dial at AUTO Loosen set screw (A319) -- Shutter dial (A316) Release pin (A313) -- Release button (A317) 7. Rewinding knob R Rewinding knob assembly (0-D6) -- Nut (D15) - Washer (D21) - ASA dial assembly (0-D11-01) 23600k-D4-A2 8. [. . . ] Counter dial Counter dial assembly (0-C34) Counter dial spring (C57) Counter retainer plate (C25) (C25) is installed in left side gutter as shown in figure. Give the spring (C57) 1/2 or 3/4 turns of tension. 17. Bulb off adjustment (Winding lever is at pre-advance position. ) After releasing the first curtain, adjust "B" off position with eccentric screw riveted on bulb actuator plate (A504). When shutter rod comes back, 0. 2mm clearance is necessary after releasing the 2nd curtain. 23900 Page 4 of 15 18. Cocked shutter assembly (0-C23) - SW actuator lever shaft. Main SW adjustment = (I200) When shutter actuator plate is held in "ON" position, 0. 2mm clearance is necessary between longer contact piece of main SW and insulation blue collar. To adjust the clearance, bend the shorter contact piece. When both contact pieces touch each other, and the shorter contact piece is pulled down, the longer one should be down also as the shorter one does. If there is not enough tension on the longer contact piece, it may show uneven shutter speed. When winding lever is at closed position, 0. 2mm clearance is necessary between both contact pieces. Front board and mirror housing When the above mentioned parts are installed, shutter block (E000) should be cocked but not charge mirror housing. The time lag is determined by the variation in voltage when SWm and SWg turn "ON" and "OFF". Here is one example for time lag check with a single-trace oscilloscope. Adapter should be made as shown below. Adapter is connected to mirror housing connector and oscilloscope. After charging the mirror housing and releasing it to put the mirror in the "up" state, time lag appears on the oscilloscope screen. The adjustment procedures can be referred to in item 36. 23900 Page 8 of 15 PENTAX ME F F Notes and Troubleshooting Tips FIGURES: Fig. 1 2 3 4 5 6 7 8 9 Top cover removed Bottom cover removed Front of camera, wind side Front view, mirror box removed Bottom of mirror box Current style, mirror switches Circuit for testing mirror switches Wiring diagrams Modified bottom cover ADJUSTME F FNT LOCATIONS: Auto speeds Meter readout, high light Meter readout, low light Battery test Release overtravel Mechanical speed Travel time, 1st blade Travel time, 2nd blade Trigger switch (fast speed) Magnet switch A B C D E F G H I J Fig. 1 1 1 1 3 4 4 4 4 5 ADJUSTME F FNT VALUES: Blade travel time: Flange-focal distance: Release overtravel: Mechanical speed: Battery test: Memory time lag: 6ms (20mm distance) 45. 46mm (flange to film guide rails) 0. 2mm additional travel of release slide after shutter releases 11ms to 13ms exposure time when operated with self-timer action at bulb setting Viewfinder LEDs to light steadily with 2. 55V supplied and to flash on and off at 2. 45V Magnet switch SWg to close 10ms after memory switch SWm opens 23900 Page 9 of 15 ADJUSTME F FNT SEQUENCE: 1. Auto speeds Variable resistor A set: ASA 100, X1 compensation, f/8. With 2. 8V supplied to the battery compartment, the shutter should deliver the following shutter speeds ath the indicated light levels: EV12 1/60 second EV16 1/1000 second EV8 1/4 second 2. Meter Readout EV 12 and 16 Adjust variable resistor B EV8 Adjust variable resistor C Later versions of the flex circuit board have only one meter readout adjustment, Fig. Battery test Adjust variable resistor D for proper operation. [. . . ] Shutter assembly (3 screws) REASSEMBLY HIGHLIGHTS: 1. Replace the mirror-box with the mirror in the released position and the shutter in the cocked position To replace the top cover, set the speed selector to the Bulb ("B") position and the wind-lever shaft to the closed position. Then seat the top cover and turn the speed selector to the auto setting. 2. 23900 Page 11 of 15 TROUBLESHOOTING: Typical battery drain Meter: 1. 7-2. 0mA Shutter open: 10mA Behaviour with batteries Fastest speed only except at mechanical shutter settings Replacement parts Circuit board T100 and Seiko shutter E000 available from Pentsx only as complete modules; other parts available individually Troubleshooting steps for specific problems 1. Shutter gives only mechanical speed at auto, LEDs don't turn on Battery voltage at flex circuit Check for +3V between ground and each red wire at top of flex circuit. [. . . ]