Banding with 5D - Canon's fix

[ddroll]

FYI only - On May 2nd, I posted "Banding with 5D" -

http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00L08T. Though I don't

believe this is the same "banding" problem others have written about, I have

since sent in the body to Canon's NJ facility. The charge was $204.00 ($180

labor, tax $9 and shipping $15). They gave the following "Service detail": "We

have examined the product according to your request, and, upon close inspection

the exact cause could not be identified but it was found that dust became stuck

to the image elements. The digital pcp ass'y was replaced. Adjusted c-mos.

Adjusted focus and exposure, updated firmware and re-imaged c-mos. Checked,

cleaned and adjusted all to factory specs." So I guess the mystery continues as

to what caused it, however it appears the camera was fixed. I'm not sure if

altitude or ambient temp played a role as the problem pic was taken around 30

degrees and at about 9000'. Hard to duplicate that at 668' and 90 degrees. I

guess my reason for this posting share info about a problem I had with the 5D

that may help others. I have attached the pic again so if someone has similar

problems, they know the remedy. Overall, I was satisfied with Canon's service

and still love the 5D.

[m_barbu1]

My suspicion is that the part that was replaced was the cause. I'm guessing the other steps were either required by replacing that part, or done "just to be sure".

[picturesque]

What is a pcp assembly?

[buck_rogers1]

I think it's actually pcb for 'printed circuit board'

[William Michael]

>> What is a pcp assembly <<

 

`Peripheral Control Processor Assembly` or `Peripheral Control Assembler`:usually used to control ES (Embedded Software).

 

I am not stating there is a PCP inside a 5D, merely stating what a `PCP` is: thus `pcp ass`y` could in fact be a typo, as mentioned above.

 

WW

[savagesax]

The PCP are the drugs the techs were on while working on the camera?

[William Michael]

>> The PCP are the drugs the techs were on while working on the camera? <<

 

Phenylcyclohexylpiperidine: (PCP). Drug, Scheduled S8 Aust. equivalent Schedule II USA.

 

Developed originally as an anaesthetic, originally in caner patients.

 

Used as a recreational drug. Exhibits hallucinogenic effects. A neurotoxin.

 

Street names: `Ashy Larry`, `Angel Dust`.

 

WW

[alec_myers]

Um... is there something you need to get off your chest, Mr. W?!

[William Michael]

>> Um... is there something you need to get off your chest, Mr. W?! <<

 

Just Happy :) And I could not resist, innocent enough really. Let me explain:

 

Yet another three letter acronym, which just appealed to a quirky sense of humour.

 

If the Canon work sheet / report did not use acronyms, but described in full what was done / replaced, then we would not be having the discussion about what the pcp is.

 

I realize the point was oblique, but that is it, in a nutshell.

 

Regards

 

WW

[shadowcatcher]

Sounds like you had a new camera to me.

 

PCP means phencylidine to me as well for what it is worth.

[picturesque]

Thanks for the answers, everyone. I asked because I also had a pcp assembly replaced on my 20D, and now it seems to work better than before--surer autofocus--but it could just be my imagination or I'm better at autofocusing...

[ddroll]

Thanks all, The explanation from Canon was a cut and paste job. Though it says pcp, they obviously meant pcb or printed circiutboard.