K500 Autofocus repairing issue

Dladio · 05-29-2018, 07:16 AM

Hi there, I'm a new user

I have finally fixed the classic aperture problem on my Pentax k500.

However, the autofocus is not working properly since that moment.

The autofocus motor runs all the course from the minimum to the maximum but never locks to any subject.

I have not the same problem in live view mode (because of the different focus mode I guess).

I hope I wrote this correctly

Please help me!
Thank you!

Adam · 05-29-2018, 10:01 AM

Originally posted by Dladio

Hi there, I'm a new user

I have finally fixed the classic aperture problem on my Pentax k500.

However, the autofocus is not working properly since that moment.

The autofocus motor runs all the course from the minimum to the maximum but never locks to any subject.

I have not the same problem in live view mode (because of the different focus mode I guess).

I hope I wrote this correctly

Please help me!
Thank you!

Dust/dirt/debris in the mirror box perhaps?

Dladio · 05-29-2018, 12:56 PM

Originally posted by Adam

Dust/dirt/debris in the mirror box perhaps?

I already tried to clean it, but maybe I did it wrong. Any advice to do it the right way?

Adam · 05-29-2018, 06:50 PM

Originally posted by Dladio

I already tried to clean it, but maybe I did it wrong. Any advice to do it the right way?

You need a manual air blower (not a compressed air canister or blowing with your mouth). If the cause isn't dust, then you may have to disassemble the mirror- that's not something I'm experienced with.

Adam
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Dladio · 05-30-2018, 02:24 AM

Originally posted by Adam

You need a manual air blower (not a compressed air canister or blowing with your mouth). If the cause isn't dust, then you may have to disassemble the mirror- that's not something I'm experienced with.

I already tried with the manual air blower. I think I have to disassemble the mirror at this point.

Thank you for your feedback

05-29-2018, 07:16 AM	#1
Dladio New Member Join Date: May 2018 Posts: 3	K500 Autofocus repairing issue Hi there, I'm a new user I have finally fixed the classic aperture problem on my Pentax k500. However, the autofocus is not working properly since that moment. The autofocus motor runs all the course from the minimum to the maximum but never locks to any subject. I have not the same problem in live view mode (because of the different focus mode I guess). I hope I wrote this correctly Please help me! Thank you!

05-29-2018, 10:01 AM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by Dladio Hi there, I'm a new user I have finally fixed the classic aperture problem on my Pentax k500. However, the autofocus is not working properly since that moment. The autofocus motor runs all the course from the minimum to the maximum but never locks to any subject. I have not the same problem in live view mode (because of the different focus mode I guess). I hope I wrote this correctly Please help me! Thank you! Dust/dirt/debris in the mirror box perhaps? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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05-29-2018, 12:56 PM	#3
Dladio New Member Join Date: May 2018 Posts: 3 Original Poster	Originally posted by Adam Dust/dirt/debris in the mirror box perhaps? I already tried to clean it, but maybe I did it wrong. Any advice to do it the right way?

05-29-2018, 06:50 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Originally posted by Dladio I already tried to clean it, but maybe I did it wrong. Any advice to do it the right way? You need a manual air blower (not a compressed air canister or blowing with your mouth). If the cause isn't dust, then you may have to disassemble the mirror- that's not something I'm experienced with. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

05-30-2018, 02:24 AM	#5
Dladio New Member Join Date: May 2018 Posts: 3 Original Poster	Originally posted by Adam You need a manual air blower (not a compressed air canister or blowing with your mouth). If the cause isn't dust, then you may have to disassemble the mirror- that's not something I'm experienced with. I already tried with the manual air blower. I think I have to disassemble the mirror at this point. Thank you for your feedback