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Pentax ZX-5n Flash Capacitor Unit

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  1. Pentax ZX-5n Flash Capacitor Unit, Remove back cover: шаг 1, изображение 1 из 1
    • Push down on the screw to depress the spring loaded hinge and release the door.

  2. Pentax ZX-5n Flash Capacitor Unit, Remove bottom cover: шаг 2, изображение 1 из 1
    • Remove six 5.3 mm #00 screws.

    • Remove one 3.4 mm #00 screw.

    • The short screw has a machine thread and screws into the plate underneath. The rest screw into the plastic body.

  3. Pentax ZX-5n Flash Capacitor Unit, Remove left front cover: шаг 3, изображение 1 из 1
    • Remove three 5.3 mm #00 screws (the bottom-most screw is not always present).

    • Remove one 7.3 mm #00 screw.

    • Remove the remote trigger cover.

  4. Pentax ZX-5n Flash Capacitor Unit, Remove front cover: шаг 4, изображение 1 из 2 Pentax ZX-5n Flash Capacitor Unit, Remove front cover: шаг 4, изображение 2 из 2
    • Remove one 3.4 mm #00 screw.

    • Remove two 5.3 mm #00 screw.

    • Gently lift up on the flash housing to help remove the cover if necessary.

  5. Pentax ZX-5n Flash Capacitor Unit, Remove right front cover: шаг 5, изображение 1 из 1
    • Remove two 3.9 mm #00 screws.

  6. Pentax ZX-5n Flash Capacitor Unit, Remove eye cup: шаг 6, изображение 1 из 1
    • Slide the eye cup up and off to access the screws underneath.

  7. Pentax ZX-5n Flash Capacitor Unit, Unscrew top cover: шаг 7, изображение 1 из 3 Pentax ZX-5n Flash Capacitor Unit, Unscrew top cover: шаг 7, изображение 2 из 3 Pentax ZX-5n Flash Capacitor Unit, Unscrew top cover: шаг 7, изображение 3 из 3
    • Remove two 5.3 mm #00 screws by the eyepiece.

    • Remove one 6.8 mm #00 screw in the battery compartment.

    • Remove one 7.0 mm #00 screw near the take up spool.

  8. Pentax ZX-5n Flash Capacitor Unit, Lift top cover: шаг 8, изображение 1 из 1
    • Lift the cover so it is just free of the body. It is still attached by several wires.

  9. Pentax ZX-5n Flash Capacitor Unit, Discharge flash capacitors: шаг 9, изображение 1 из 1
    • Use a 1kΩ-10kΩ resistor to discharge the capacitor. Place the resistor between the blue wire, exposed in the previous step, and ground.

    • The flash capacitors store energy at a very high voltage. Failing to discharge the capacitors properly could result in personal injury and/or damage to the camera.

  10. Pentax ZX-5n Flash Capacitor Unit, Release top cover: шаг 10, изображение 1 из 1
    • De-solder the green, blue, brown and black wires from the flash PCB.

  11. Pentax ZX-5n Flash Capacitor Unit, De-solder battery connections: шаг 11, изображение 1 из 3 Pentax ZX-5n Flash Capacitor Unit, De-solder battery connections: шаг 11, изображение 2 из 3 Pentax ZX-5n Flash Capacitor Unit, De-solder battery connections: шаг 11, изображение 3 из 3
    • Move the top cover to the side to access the battery connections. It is still connected by a flex cable.

    • De-solder the indicated joints. Use a solder sucker on the tabbed connections.

    • Pull the black wire from the battery flex to get more slack in the connection to the top cover.

    • Be careful not to overheat the flex circuit. Work in short durations. Allow for cool downs in between if necessary.

  12. Pentax ZX-5n Flash Capacitor Unit, Desolder flex cable: шаг 12, изображение 1 из 1
    • Desolder the flex cable connecting the top plate to the camera body.

    • Be careful not to overheat the flex circuit. Work in short durations. Allow for cool downs in between if necessary.

    • The top cover can be completely removed at this point.

  13. Pentax ZX-5n Flash Capacitor Unit, De-solder flex posts: шаг 13, изображение 1 из 1
    • Use a solder sucker to de-solder the four posts from the flex circuit.

    • This is the most difficult part of the repair. Patience and persistence are required.

    • Be careful not to overheat the flex circuit. Work in short durations. Allow for cool downs in between if necessary.

  14. Pentax ZX-5n Flash Capacitor Unit, De-solder flex connections: шаг 14, изображение 1 из 1
    • De-solder the marked connections.

    • Be careful not to overheat the flex circuit. Work in short durations. Allow for cool downs in between if necessary.

  15. Pentax ZX-5n Flash Capacitor Unit, Unscrew flex circuit: шаг 15, изображение 1 из 1
    • Remove one 4.3 mm #00 screw.

  16. Pentax ZX-5n Flash Capacitor Unit, Lift the flex circuit: шаг 16, изображение 1 из 2 Pentax ZX-5n Flash Capacitor Unit, Lift the flex circuit: шаг 16, изображение 2 из 2
    • Gently pry up the plastic carrier under the flex circuit. It may catch slightly on the battery contact tab.

    • Pay close attention to the connections around the four through-hole posts as you lift the flex. Make sure that no solder is left over and that it pulls away freely.

    • This metal tab is lightly held in place with lacquer and can easily come loose. Keep an eye on it.

  17. Pentax ZX-5n Flash Capacitor Unit, Unscrew flash PCB: шаг 17, изображение 1 из 1
    • Remove one 3.3mm #00 screw.

    • Remove one 3.9 #00 screw.

    • De-solder the red wire.

    • Peel off the black tape. Leave it attached to the wires.

  18. Pentax ZX-5n Flash Capacitor Unit, Remove flash PCB and capacitors: шаг 18, изображение 1 из 2 Pentax ZX-5n Flash Capacitor Unit, Remove flash PCB and capacitors: шаг 18, изображение 2 из 2
    • Gently peel the flex circuit from the surface of the capacitor.

    • There may be additional adhesive underneath the larger capacitor.

    • Lift the two capacitors and the flash PCB out as a single unit.

    • The double sided tape used to secure the capacitors can be softened with isopropyl alcohol if necessary.

Заключение

To reassemble your device, follow these instructions in reverse order.

Sam Gustafson

Участник с: 09/01/22

3 233 Репутация

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