konica minolta 658e bad copy

[brent]

ok this is going to be interesting.. customer calls and said the scanner was sideways in copier.. I said no way.. and sure enough it was.. the screw came out of the right hand side platten making the scanner totally crooked in the machin. no damage and I couldnt believe it myself. never seen that happen before. well that was 4 weeks ago. today making bad copies. so I went back and opened it up and seen that the front side scanner cable never was put back on the white pulley. so Itook care of that. so that leads me to my question.. prints from a computer are perfect.. the copies when using a document feeder are also perfect. but the copies when using the original glass are really bad. I will include pics the scanner goes left to right just fine.. no jumping no noice.. and the scanner unit is completely square in the housing.. unlike earlier when the cable was off. is there a function I can do to recalibrate this ? I cant figure out what would be making these horrible lines on the top of the copy any thoughts please? also its not the drum. something in the optics I am assuming and I hope I gave enough info to diagnose;



thanks much. brent

[tsbservice]

Re: konica minolta 658e bad copy

Silly question Brent but did you make glass copy after initial repair.

[allan]

Re: konica minolta 658e bad copy

Also never seen that before. Would like to know how it got into that state. If i got to the machine in its current state not knowing that the scanner cable came undone and all looks to be mechanically OK i would try to adjust the CCD alignment. I that condition that would be a real bad idea.


Would think that there is still an alignment issue with the first and second scanner. It could be nice and square looking from the top, but could perhaps be higher or lower in relation to the platen glass.
Are all the scanner shoes still there?

[brent]

Re: konica minolta 658e bad copy

Silly question Brent but did you make glass copy after initial repair.

yes it was a bad copy but I was just glad to get it to a copying state

brent

[brent]

Re: konica minolta 658e bad copy

Also never seen that before. Would like to know how it got into that state. If i got to the machine in its current state not knowing that the scanner cable came undone and all looks to be mechanically OK i would try to adjust the CCD alignment. I that condition that would be a real bad idea.


Would think that there is still an alignment issue with the first and second scanner. It could be nice and square looking from the top, but could perhaps be higher or lower in relation to the platen glass.
Are all the scanner shoes still there?

allan. it was a crazy service call.. in my 27 years of service I have never seen a screw back out and the scaner rail let the spool free spool in lack of a better word. sideways scanner slammed. I am lucky it didnt' break the end of the scanner assy itself. ccd alilgnment? I will certainly check into that.. like I said it is only when making a glass copy.. printing ok i get that.. but the reason that doc feeder makes a good copy is that the scanner is in home position is all I can think of..
also yes it looks certainly square to me.. but anything could be off just a litt.e the cable actually ran on the edge of the white plastic guide I cant believe it even worked to be honest lol
brent

[blackcat4866]

Re: konica minolta 658e bad copy

Just speculating: Maybe it was built and calibrated with the cable out of the pulley, so when you re-positioned the cable, now it's askew.

I wish I could say I'd never seen a flailing scanner, but that would be a lie. On the Ricoh Aficio AF-550/650/750 series MFPs it was unfortunately common for the M3 screw through the scanner drum to shear off clean. Then only the front or rear of the scanner was driven, and the other end would just drag along ... flailing around. Broken lamps, bent reflectors, and tangled cables were common. I used to carry M3 x 12mm grade 8 hex bolts to replace the standard screws. I'm sure I still have a few in my case.
=^..^=

[BillyCarpenter]

Re: konica minolta 658e bad copy

Just speculating: Maybe it was built and calibrated with the cable out of the pulley, so when you re-positioned the cable, now it's askew.

I wish I could say I'd never seen a flailing scanner, but that would be a lie. On the Ricoh Aficio AF-550/650/750 series MFPs it was unfortunately common for the M3 screw through the scanner drum to shear off clean. Then only the front or rear of the scanner was driven, and the other end would just drag along ... flailing around. Broken lamps, bent reflectors, and tangled cables were common. I used to carry M3 x 12mm grade 8 hex bolts to replace the standard screws. I'm sure I still have a few in my case.
=^..^=

Now that's thinking outside the box and just crazy enough that it may work.

[brent]

Re: konica minolta 658e bad copy

Just speculating: Maybe it was built and calibrated with the cable out of the pulley, so when you re-positioned the cable, now it's askew.

I wish I could say I'd never seen a flailing scanner, but that would be a lie. On the Ricoh Aficio AF-550/650/750 series MFPs it was unfortunately common for the M3 screw through the scanner drum to shear off clean. Then only the front or rear of the scanner was driven, and the other end would just drag along ... flailing around. Broken lamps, bent reflectors, and tangled cables were common. I used to carry M3 x 12mm grade 8 hex bolts to replace the standard screws. I'm sure I still have a few in my case.
=^..^=

yes maybe it was. I am not sure. but I think I may have a situation on my hand. you described perfectly what happened to the scanner. pulled it right along sideways. no other machine on earth 658e has done this? lol my luck

[rrrohan]

Re: konica minolta 658e bad copy

Maybe the scanner bed not flat. Is problem worse on A3

Sent from my Pixel 4 XL using Tapatalk

[brent]

Re: konica minolta 658e bad copy

Maybe the scanner bed not flat. Is problem worse on A3

Sent from my Pixel 4 XL using Tapatalk

I will take some 11 by 17 paper and check on it.. I am hoping the scanner is just jumping a little bit

brent

[brent]

Re: konica minolta 658e bad copy

11 by 17 I have a copy. still horrible copy.. I took particular attention to the scanner traveling. seemed smooth. I did apply a thin layer of light grease on the rails as well.. no jerking I just am beside myself.. I think the scanner must be crooked or something just very minute to make it do this copy.. any other ideas?
thank you so much

brentbadcopy3.jpg

[byronf]

Re: konica minolta 658e bad copy

Hi,
This is caused by the 3rd mirror misalign.

It's a time consuming task to adjust and waste of paper while testing as this distorted image moves towards the ADF and back to platern glass while adjusting the mirror.

I have had many of these, changing the complete scanner unit solves the issue. Scanner unit from 4 / 4e series fits like a glove on 8 series. Repair time is about 20 minutes.

[byronf]

Re: konica minolta 658e bad copy

Hi,
This is caused by the 3rd mirror misaligned.

It's a time consuming task to adjust and waste of paper while testing as this distorted image moves towards the ADF and back to platern glass while adjusting the mirror.

I have had many of these, changing the complete scanner unit solves the issue. Scanner unit from 4 / 4e series fits like a glove on 8 series. Repair time is about 20 minutes.

[brent]

Re: konica minolta 658e bad copy

Hi,
This is caused by the 3rd mirror misaligned.

It's a time consuming task to adjust and waste of paper while testing as this distorted image moves towards the ADF and back to platern glass while adjusting the mirror.

I have had many of these, changing the complete scanner unit solves the issue. Scanner unit from 4 / 4e series fits like a glove on 8 series. Repair time is about 20 minutes.

wow ok are you saying a 364e scanner assembly will fit? I will verify part numbers too. also forgive me but the scanner carries the first mirror correct? so the second sets of mirrors stay in machine just replace the scanner assy? I really do appreciate your information on this
thanks a mill

brent

[brent]

Re: konica minolta 658e bad copy

Hi,
This is caused by the 3rd mirror misalign.

It's a time consuming task to adjust and waste of paper while testing as this distorted image moves towards the ADF and back to platern glass while adjusting the mirror.

I have had many of these, changing the complete scanner unit solves the issue. Scanner unit from 4 / 4e series fits like a glove on 8 series. Repair time is about 20 minutes.

if you get a chance would you look at my last comment to you? are you replacing the scanner ccd onlly or the mirror assy as well? I come up with a different part number from the 658e series to the 364e series.. is it the same? I will s wap this out but trying to figure out what parts.. only the ccd or both.. thanks again so much

brent