Pentax ist DL Service Manual page 53

[Supplement] If focus is NG, There is possibility with following factors.
AF focus position error or adjusting error. (Confirm AF focus position (FI) : NG)
→ Adjust positioning of 1
mechanism)
Height of the CCD Base Plate Support Pillar is NG
→ Confirm with disassembly, Adjust with washer and re-assemble.
Related parts: Mount ring, Front, Front Housing Block, body main plate (pillar installing
parts), and other frame (0-A3, A4, A5,A6)
If camera is OK, There is possibility for trouble with the lens.
24-6. CCD Cleaning
*This method of confirmation is assumption for CCD cleaning in service.
[Required equipment]
Computer, AC adaptor, USB cable, AF 50mm F1.4 (or F1.7), Light box, Cleaning paper for CCD
(Clean wipe-P), solvent for cleaning (EE6310 or C600), Tweezers (recommend to use flat tip),
SD card for test, Image viewing software (e.g. Photo shop, ACDsee, etc.)
[Confirmation]
(1) Attach the FA50mm lens to the camera and set the lens aperture to A position.
(2) Set the camera as follows.
Capture mode: AV (Aperture-priority) mode and Set AV 22 (FNo.22), ISO speed: 200, Focus
mode SW: MF, Exposure compensation:+1/2EV, Recorded pixels: 6M (Default setting),
Quality Level: Best.
(3) Turn the distance ring of the lens to infinity (∞).
(4) Take the pictures of the light box from on 3cm.
(5) Display the images on the computer with image viewing software.
(6) Set the image to life size (1:1) and confirm dust. (Better to make clear the position of dust with
such as coordinate)
If you see dust clearly on image, there is possibility that the dust enters into the inside of
CCD. (Disassembly and cleaning or replace T600)
[Cleaning method of dust]
[CAUTION] 1, For safety, use two type of power source for cleaning (AC adapter and full capacity
of battery)
2, Do not use a brush-less blower and a spray type blower to clean the CCD because
30°
and 2 Mirror, AF adjustment by programmed software (Part of SLR
st nd
76570EM 52