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05-22-2023, 04:04 AM - 1 Like   #1
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Pentax Q 06 lens partial disassembly

Pentax Q 06 lens focus has failed, autofocus and movement of manual focus ring does nothing and attempting to take photo locks camera until battery removed. Pentax Q 02 lens still works fine, so camera assumed to be OK.

Attempting to find a cure, first step is to examine for obvious mechanical wear or poor electrical contacts - nothing visible so have to disassemble. Couldn't find pictures on the internet, so started to do this myself - aiming to complete later but I thought my progress so far may help others.

The dissassembly works from the lens mount working forward.

Require a small JIS cross head or similar screwdriver, similar to watchmakers. Check for good fit as some screws are tight.
May need fine tweezers.

Remove the Q mount cap.

Note: The outer part of the lens case is held by three small screws - it seems mainly decorative. Easy to remove and replace.

Remove the three screws from the outer part of the lens case.
DO NOT remove the Q mount at this stage!
Remove the three screws from the Q mount.
Remove the outer part of the lens case.
Note: The Q mount is also held by three screws, obviously not decorative. Also it's attached to the contact board with a supporting plastic bracket. These attach underneath using a printed ribbon cable and tricky ZIF socket. It seems best to leave the ribbon cable connected, so remove the screws and plastic bracket, noting position, and then carefully manouvre the Q mount around the ribbon cable and off the lens, leaving the contact board connected but unspported.

Remove the three screws holding the plastic bracket.
Remove the plastic bracket.


Manouver the Q mount off the lens, leaving the contact plate ribbon cable connected.

Note: The reverse procedure is tricky, but easier than trying to refit the cable into the ZIF socket with the mount in the way - as I found out the hard way. If you do need to reconnect, carefully hold the ribbon cable in place in the socket, fold the black grip back over the cable and pull back, clicking into place.

There are two metal shims covering the next set of screws on the outer casing. Note that these have good guides for position. Remove the shims.

Remove the screws from the plastic support bracket at the back of the lens and remove the bracket. Note the flat section corresponds to the position of the key for zooming the lens out.

Note: The next part of the lens outer case looks to be held with three screws, that have a small indent to allow them to be removed with the circuit board still in place.

The component that seems to be related to zoom and shutter release enable looks to be held with a screw, probably inaccessible at this stage. There is a guide pin that seems to fit in the channel to convert turning of lens to extension.

At this stage I reassembled the lens, and it is still recognised but still fails, as expected as I haven't reached the motor. I plan to start on the next stage soon.


05-22-2023, 04:48 PM   #2
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Thanks for sharing, good luck, one of the best lenses on the Q
05-25-2023, 06:56 AM - 1 Like   #3
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Removing the next three screws and one in the side didn't give any extra access to the focus motor area, just the opening out and zooming of lens. The front label around the lens covers a number of screws (8, I think 2 sets of 3 and one pair). I'll examine this and see if working from that end gets me any further - will disassemble and take photos when I've got a couple of hours to spare. If anyone has already done this I'd appreciate information on which screws release hidden springs etc.


Last edited by mikeprotts; 05-27-2023 at 02:49 AM.
05-27-2023, 03:14 AM   #4
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The lens identification sticker seems to be stuck with simple adhesive, and once an edge has been accessed pulls away easily. At the bottom is a small notch. I suggest keeping this in a clean plastic bag to avoid dust sticking to the adhesive.

The front lens cap removed shows 8 screws. Working clockwise from the top, viewed from the front (in this picture top marker near screw 1 is rotated to just below middle left) I think these are:
1, 3 & 8 filter ring and outer tube
2, 4 & 7 Front element holder
5, 6 another component - not sure what this is. Normally hidden behind the Pentax identification sticker, not sure if that would allow any light through.

Remove screws 1, 3 & 8 to leave the front very exposed:

Even with this removed, there seems to be some hidden feature preventing removal of the focus & zoom ring, so I need to work out if this is something like a plastic clip or if I need to remove the screws holding either the circuit board or front lens element.

08-28-2023, 01:40 PM   #5
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What did you ever end up doing with this? Iím looking for pictures of a lens disassembled to the shutter mechanism, did you scrap this? Do you still have the parts?
09-08-2023, 01:39 PM   #6
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I've not had time to look at this recently - I'm still trying to work out how the next level of disassembly works without breaking something. I think there must be some hidden clips at this stage, which I don't want to break, as that would make it much harder to put back together.

I hope to get a bit more time to look at this - might be October though as I've got far too much going on this month.
09-09-2023, 04:05 AM   #7
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Thanks for the reply. Does the shutter ever fire in the current state? If you set the camera to manual focus? I want to figure out the bare minimum circuit that will register and fire the shutter (or tell the camera it has)

09-11-2023, 08:42 AM   #8
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Currently it's not being recognised (I think a problem reattaching the ribbon cable), and does not allow anything - it thinks it has a manual lens, but there is nothing visible through the lens.

Before that, the lens would not focus, and attempting to take a picture, even in manual mode, just locked up the camera until battery removed. I suspect the motor was draining power even when not in use.

I think the focus is always motor driven, even in manual mode, so would need some way to disable that and have a fixed focus as a start.
12-12-2023, 01:28 AM   #9
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i recently also started disassembling a q 06 lens. wanted to access the front elements to clean out a massive dust there. started from the back and stopped when realising that things might get to tricky. unfortunately i disconnected the ribbon cables and there is one that i just am not to be able to reconnect so far.

anyways, thanks for your photos and looking forward to see how far you can get!

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06 lens, af, autofocus, bracket, cable, camera, disassembly, lens, mount, note, pentax help, pentax q, photography, plastic, ribbon, socket, stage, troubleshooting
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