MPC 307 bad multiple prints / copies

[dave w]

Im looking for advice as I have a deadline of next Monday to fix due to the Covid Furlough working times I have ( only 2 days a week, Mondays & Wednesdays) so my last opportunity to crack this case is next Monday due to me being off until next year and I'm the only copier tech in the company ( small dealer)#Dont want the customer to wait until next year for a fix

had one opportunity so far to investigate


I have a MPC 307 that is not giving perfect multiple copies or prints

please see attached , the quality is a separate issue as only happened after I fitted a new ITB & TRANSFER/SEPARATION UNIT: [ K pcu on order ]

Capture.jpg

a single copy or print is fine - more than one sheet and the image moves
No SC Codes

all firmware has been updated

SP mode adj were made after ITB was fitted
SP1-001-031
SP2-111-004


Is this a obvious issue that I'm missing?

Thanks in advance

[slimslob]

My guess would be that the registration roller has not stopped before the next sheet gets to it.

[mga]

SP mode adj were made after ITB was fitted
SP1-001-031
SP2-111-004


Is this a obvious issue that I'm missing?

Thanks in advance

Why did you so these adjustments you don't need to do this when you replace the transfer unit I would refit old parts if can still be used clean I'd sensors try 1st in user tools registration adjustment if that fails do force line adjustment incorrect order



[/QUOTE]

[dave w]

SP mode adj were made after ITB was fitted
SP1-001-031
SP2-111-004


Is this a obvious issue that I'm missing?

Thanks in advance

Why did you so these adjustments you don't need to do this when you replace the transfer unit I would refit old parts if can still be used clean I'd sensors try 1st in user tools registration adjustment if that fails do force line adjustment incorrect order

[/QUOTE]

Hi mga

I was following the svs guide

Do the following after replacing the ITB unit.
1. Enter the SP mode.
2. Set SP1-001-031 (Leading Edge Registration Std. Measure: On/Off) to “1”.
3. Execute SP2-111-004 (Forced Line Position Adj. Mode d).
4. SP values from SP1-001-033 to 040 (Leading Edge Registration Offset Standard: 1 to 8) are updated by the
above steps.
4.Replacement and Adjustment
242
5. Reset SP1-001-031 to “0”.
6. Exit from the SP mode.
7. Turn the main power off and on.

[dave w]

My guess would be that the registration roller has not stopped before the next sheet gets to it.

Hi slimslob

Thats my way of thinking, A timing issue.
Its not one color thats affected all are drifting . I did think the paper transfer roller felt abit stiff and maybe thats the area I should concentrate on (dont have another machine to check against)

Will have a go on Monday

Many thanks

Dave

[mga]

Hi mga

I was following the svs guide

Do the following after replacing the ITB unit.
1. Enter the SP mode.
2. Set SP1-001-031 (Leading Edge Registration Std. Measure: On/Off) to “1”.
3. Execute SP2-111-004 (Forced Line Position Adj. Mode d).
4. SP values from SP1-001-033 to 040 (Leading Edge Registration Offset Standard: 1 to 8) are updated by the
above steps.
4.Replacement and Adjustment
242
5. Reset SP1-001-031 to “0”.
6. Exit from the SP mode.
7. Turn the main power off and on.[/QUOTE]

Sorry you are correct I have fitted hundreds the only thing I do for itb is SP3-701-093 to 1 then reboot

[ccfc87]

Hi slimslob

Thats my way of thinking, A timing issue.
Its not one color thats affected all are drifting . I did think the paper transfer roller felt abit stiff and maybe thats the area I should concentrate on (dont have another machine to check against)

Will have a go on Monday

Many thanks

Dave

How did you get on with this problem?

[dave w]

UPDATE

back in the office today -and we have success!

It was the registration clutch – was a total mission to replace and def a workshop job

Thanks all for the help

Dave Whidborne

that's one problem sorted now another issue has risen it ugly head

Capture.jpg
I was getting real washy blacks - under investigation I removed the K pcu and right at the back I was presented with a spring that was damaged. how ?

now the joy of getting this right.
anybody else had this joy and second do you think this is a black problem?

thanks in advance

Dave

[marvin-vegan]

that's one problem sorted now another issue has risen it ugly head


I was getting real washy blacks - under investigation I removed the K pcu and right at the back I was presented with a spring that was damaged. how ?

now the joy of getting this right.
anybody else had this joy and second do you think this is a black problem?

thanks in advance

Dave

Hi Dave,
got similar issue. After replacing of ITB - when removing belt out of machine, it was stucked. When released, spring was damaged. This spring transfers the current from HVPS board to ITB transfer roller (for black drum). It has to be curled again with the right shape or get another one. But the replacement is very complicated, nearly impossible on site. If you have proper tools and skilful hands, you can kind of recreate the original loop so the spring will again touch the counterpart on the ITB. Only then the current transfers correctly and black is rich again. Needs time and tiny hands/fingers.

sprint damaged.jpg

spring correct.jpg

pale print.jpg

[dave w]

Hi Dave,
got similar issue. After replacing of ITB - when removing belt out of machine, it was stucked. When released, spring was damaged. This spring transfers the current from HVPS board to ITB transfer roller (for black drum). It has to be curled again with the right shape or get another one. But the replacement is very complicated, nearly impossible on site. If you have proper tools and skilful hands, you can kind of recreate the original loop so the spring will again touch the counterpart on the ITB. Only then the current transfers correctly and black is rich again. Needs time and tiny hands/fingers.

sprint damaged.jpg

spring correct.jpg

pale print.jpg

AHH YES!
Bang on what has happened - I was issued a new belt that was faulty.
It seemed to go in ok but was difficult to remove, I noticed the tension mech was faulty on the belt and im sure thats what messed up the spring.
same print out.

We have sourced another machine for the customer to keep and now I have time in the workshop to strip down and see what part is needed, difficult to see on the parts manual if its just a spring or a modual.

I have the time and good finger dexterity its just my eye sight that is letting me down now! lol

wish me luck

Thanks again