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Pentax ZX-5n Flash Capacitor Unit

Einleitung

How to remove the two flash capacitors and the PCB they are attached to. A donor part from another camera will be needed.

Was du brauchst

  1. Pentax ZX-5n Flash Capacitor Unit, Remove back cover: Schritt 1, Bild 1 von 1

    • Push down on the screw to depress the spring loaded hinge and release the door.

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  2. Pentax ZX-5n Flash Capacitor Unit, Remove bottom cover: Schritt 2, Bild 1 von 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.

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  3. Pentax ZX-5n Flash Capacitor Unit, Remove left front cover: Schritt 3, Bild 1 von 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.

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  4. Pentax ZX-5n Flash Capacitor Unit, Remove front cover: Schritt 4, Bild 1 von 2 Pentax ZX-5n Flash Capacitor Unit, Remove front cover: Schritt 4, Bild 2 von 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.

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  5. Pentax ZX-5n Flash Capacitor Unit, Remove right front cover: Schritt 5, Bild 1 von 1

    • Remove two 3.9 mm #00 screws.

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  6. Pentax ZX-5n Flash Capacitor Unit, Remove eye cup: Schritt 6, Bild 1 von 1

    • Slide the eye cup up and off to access the screws underneath.

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  8. Pentax ZX-5n Flash Capacitor Unit, Unscrew top cover: Schritt 7, Bild 1 von 3 Pentax ZX-5n Flash Capacitor Unit, Unscrew top cover: Schritt 7, Bild 2 von 3 Pentax ZX-5n Flash Capacitor Unit, Unscrew top cover: Schritt 7, Bild 3 von 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.

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  9. Pentax ZX-5n Flash Capacitor Unit, Lift top cover: Schritt 8, Bild 1 von 1

    • Lift the cover so it is just free of the body. It is still attached by several wires.

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  10. Pentax ZX-5n Flash Capacitor Unit, Discharge flash capacitors: Schritt 9, Bild 1 von 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.

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  11. Pentax ZX-5n Flash Capacitor Unit, Release top cover: Schritt 10, Bild 1 von 1

    • De-solder the green, blue, brown and black wires from the flash PCB.

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  12. Pentax ZX-5n Flash Capacitor Unit, De-solder battery connections: Schritt 11, Bild 1 von 3 Pentax ZX-5n Flash Capacitor Unit, De-solder battery connections: Schritt 11, Bild 2 von 3 Pentax ZX-5n Flash Capacitor Unit, De-solder battery connections: Schritt 11, Bild 3 von 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.

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  13. Pentax ZX-5n Flash Capacitor Unit, Desolder flex cable: Schritt 12, Bild 1 von 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.

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  14. Pentax ZX-5n Flash Capacitor Unit, De-solder flex posts: Schritt 13, Bild 1 von 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.

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  15. Pentax ZX-5n Flash Capacitor Unit, De-solder flex connections: Schritt 14, Bild 1 von 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.

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  16. Pentax ZX-5n Flash Capacitor Unit, Unscrew flex circuit: Schritt 15, Bild 1 von 1

    • Remove one 4.3 mm #00 screw.

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  17. Pentax ZX-5n Flash Capacitor Unit, Lift the flex circuit: Schritt 16, Bild 1 von 2 Pentax ZX-5n Flash Capacitor Unit, Lift the flex circuit: Schritt 16, Bild 2 von 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.

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  18. Pentax ZX-5n Flash Capacitor Unit, Unscrew flash PCB: Schritt 17, Bild 1 von 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.

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  19. Pentax ZX-5n Flash Capacitor Unit, Remove flash PCB and capacitors: Schritt 18, Bild 1 von 2 Pentax ZX-5n Flash Capacitor Unit, Remove flash PCB and capacitors: Schritt 18, Bild 2 von 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.

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Abschluss

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

Autor:in

mit 1 anderen Mitwirkenden

Sam Gustafson

Mitglied seit: 09/01/22

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