Pentax KX mlu problem

pepitajack · 08-23-2022, 06:03 AM

Hello

When I try to activate the mlu in my Pentax KX the mirror doesn’t stay up, is it a common problem? Is it difficult to get it fixed?

Thanks

Last edited by pepitajack; 08-23-2022 at 06:20 AM.

titrisol · 08-23-2022, 08:08 AM

Is this a new problem?
The locking lever must be turned all the way before pressing the button (page 25 of the manual)

I'm guessing that probably Eric can fix that during a service, to fix that lever a full dissasembly might be needed

Manual here

pepitajack · 08-23-2022, 01:43 PM

Originally posted by titrisol

Is this a new problem?
The locking lever must be turned all the way before pressing the button (page 25 of the manual)

I'm guessing that probably Eric can fix that during a service, to fix that lever a full dissasembly might be needed

Manual here

yes I know I have to move the lever to the right to activate the mlu pushing the button.
The camera was gifted to me with the problem and since I live in Europe sending the camera to Eric is going to be expensive.
I’m going to ask to some local camera repair shop for a quote…maybe if the price is too high I’ll keep the camera as is. (Or I’ll search for a new one since I like the kx a lot)

Thanks

**ChrisPlatt** · 08-23-2022, 02:13 PM

Do you anticipate needing to use mirror lockup?

I have owned several cameras with MLU including the Pentax KX.
I have never once been in a situation requiring use of this function.

Chris

**pentaxus** · 08-23-2022, 10:47 PM

You have to remove the front panel to repair that. Someone who repairs mechanical cameras should be able to do that. The camera rescue project in Finland could do it but I'm not sure if they do repairs for people.

pepitajack · 08-24-2022, 04:58 AM

Originally posted by ChrisPlatt

Do you anticipate needing to use mirror lockup?

I have owned several cameras with MLU including the Pentax KX.
I have never once been in a situation requiring use of this function.

Chris

Lately I’m using more and more the tripod and mlu seems to be a nice feature to have

**ChrisPlatt** · 08-24-2022, 08:02 AM

Originally posted by pepitajack

Lately I’m using more and more the tripod and mlu seems to be a nice feature to have

You can get the benefits of a tripod with or without MLU.

Mirror lockup may be useful with extreme magnifications in macrophotography, with extremely long telephoto lenses,
or with certain lenses with rear elements that protrude deep inside the lens mount thus interfering with the mirrors movement.

Chris

titrisol · 08-24-2022, 08:13 AM

You can find an exploded view of the camera here: https://learncamerarepair.com/productlist.php?category=2&secondary=10
You might be able to find a service manual as well

Autonerd · 08-31-2022, 06:32 PM

Originally posted by pepitajack

yes I know I have to move the lever to the right to activate the mlu pushing the button.
The camera was gifted to me with the problem and since I live in Europe sending the camera to Eric is going to be expensive.
I’m going to ask to some local camera repair shop for a quote…maybe if the price is too high I’ll keep the camera as is. (Or I’ll search for a new one since I like the kx a lot)

Thanks

I have two KXs. One is new (to me) and I just got it back from Eric for a CLA. The mirror does stay in the up position when the button is pressed.

My other KX is one I've had since the 90s (it was my grandfather's before that). It has never been serviced. On this camera, te mirror does -not- stay locked up when I press the button. I seem to remember that it used to (though it's been decades since I tried it) so my guess is it's something that breaks with time or banging around.

Aaron

pepitajack · 12-07-2022, 05:12 AM

At the end I decided to send the KX for a cla and sold my 2 Pentax mx, I hope will come back soon

08-23-2022, 06:03 AM	#1
pepitajack New Member Join Date: Feb 2020 Posts: 21	Pentax KX mlu problem Hello When I try to activate the mlu in my Pentax KX the mirror doesn’t stay up, is it a common problem? Is it difficult to get it fixed? Thanks Last edited by pepitajack; 08-23-2022 at 06:20 AM.

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08-23-2022, 08:08 AM	#2
titrisol Pentaxian Join Date: Dec 2007 Location: In the most populated state... state of denial Photos: Gallery \| Albums Posts: 1,611	Is this a new problem? The locking lever must be turned all the way before pressing the button (page 25 of the manual) I'm guessing that probably Eric can fix that during a service, to fix that lever a full dissasembly might be needed Manual here

08-23-2022, 01:43 PM	#3
pepitajack New Member Join Date: Feb 2020 Posts: 21 Original Poster	Originally posted by titrisol Is this a new problem? The locking lever must be turned all the way before pressing the button (page 25 of the manual) I'm guessing that probably Eric can fix that during a service, to fix that lever a full dissasembly might be needed Manual here yes I know I have to move the lever to the right to activate the mlu pushing the button. The camera was gifted to me with the problem and since I live in Europe sending the camera to Eric is going to be expensive. I’m going to ask to some local camera repair shop for a quote…maybe if the price is too high I’ll keep the camera as is. (Or I’ll search for a new one since I like the kx a lot) Thanks

08-23-2022, 02:13 PM	#4
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,390	Do you anticipate needing to use mirror lockup? I have owned several cameras with MLU including the Pentax KX. I have never once been in a situation requiring use of this function. Chris

08-23-2022, 10:47 PM	#5
pentaxus Site Supporter Join Date: Jun 2010 Location: Central Coast, CA Posts: 1,235	You have to remove the front panel to repair that. Someone who repairs mechanical cameras should be able to do that. The camera rescue project in Finland could do it but I'm not sure if they do repairs for people.

08-24-2022, 04:58 AM	#6
pepitajack New Member Join Date: Feb 2020 Posts: 21 Original Poster	Originally posted by ChrisPlatt Do you anticipate needing to use mirror lockup? I have owned several cameras with MLU including the Pentax KX. I have never once been in a situation requiring use of this function. Chris Lately I’m using more and more the tripod and mlu seems to be a nice feature to have

08-24-2022, 08:02 AM	#7
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,390	Originally posted by pepitajack Lately I’m using more and more the tripod and mlu seems to be a nice feature to have You can get the benefits of a tripod with or without MLU. Mirror lockup may be useful with extreme magnifications in macrophotography, with extremely long telephoto lenses, or with certain lenses with rear elements that protrude deep inside the lens mount thus interfering with the mirrors movement. Chris

08-24-2022, 08:13 AM	#8
titrisol Pentaxian Join Date: Dec 2007 Location: In the most populated state... state of denial Photos: Gallery \| Albums Posts: 1,611	You can find an exploded view of the camera here: https://learncamerarepair.com/productlist.php?category=2&secondary=10 You might be able to find a service manual as well

08-31-2022, 06:32 PM	#9
Autonerd Senior Member Join Date: Oct 2019 Location: Los Angeles, CA Photos: Gallery Posts: 151	Originally posted by pepitajack yes I know I have to move the lever to the right to activate the mlu pushing the button. The camera was gifted to me with the problem and since I live in Europe sending the camera to Eric is going to be expensive. I’m going to ask to some local camera repair shop for a quote…maybe if the price is too high I’ll keep the camera as is. (Or I’ll search for a new one since I like the kx a lot) Thanks I have two KXs. One is new (to me) and I just got it back from Eric for a CLA. The mirror does stay in the up position when the button is pressed. My other KX is one I've had since the 90s (it was my grandfather's before that). It has never been serviced. On this camera, te mirror does -not- stay locked up when I press the button. I seem to remember that it used to (though it's been decades since I tried it) so my guess is it's something that breaks with time or banging around. Aaron

12-07-2022, 05:12 AM	#10
pepitajack New Member Join Date: Feb 2020 Posts: 21 Original Poster	At the end I decided to send the KX for a cla and sold my 2 Pentax mx, I hope will come back soon

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