[CQ] black bands on copies

[aakash@24]

iam facing this problem of black bands emerging on copies even if i change the drum.It is happening in 3 machines.I have changed the drum.pcr,hvt,drum unit.
new drum only yields 200-300 copies.Image arttached

changed the HDD with new firmware aslo.sometimes the drum yields more than 5k and then problem arises

[IkeW0491]

Re: black bands on copies

HI CQ,

WHat type of machine is this?

That info will help a great deal, thanks.

IKE

[northernlife]

Re: black bands on copies

SLK is 2870 I believe. Is that printout coming directly from the unit or a copy?

[aakash@24]

Both while printing and copying.this problem is like a virus.it started in 2870 and i have 2 more machines with same problem.i am using same drum and toner on my other machines and they r wrnkg fine.

[aakash@24]

Ir 2870

[IkeW0491]

Re: black bands on copies

Could be an issue with the pressure roller, possibly being worn and having a wear point on it.

This can sometimes lead to streaking like this.

IKE

[aakash@24]

But these are dark bands

[Brian8506]

Re: black bands on copies

Why don't you try switching dv unit with another machine.

[aakash@24]

Swapped the dp with another machine it works there.

[aakash@24]

Why don't you try switching dv unit with another machine.

The problems makes the drum unusable.changed pcr .right door transfer asssy hvt

[Brian8506]

Re: black bands on copies

Does the drum look worn when you remove it? You've replaced or swapped everything that contacts it. The only other thing I would look at would be the erase lamps or the laser although I've never heard of a laser or erase lamps damaging a drum. Check door specs for developing also.

[aakash@24]

Some drums are scratched on sides .some r ok.

[northernlife]

Re: black bands on copies

can speak for myself and another user on the forums but we did get a batch of bad gpr15/16 drums that caused all sorts of wonky things. It was the only time in my 11 years of being a Canon tech that Canon actually requested to have a drum unit sent back directly to tech support

[aakash@24]

The drums i am using are working on othr my machines.i have ordered new magnet rods and spacrers lets see .

[sureshraidu]

black bands

Use best quality drums and pcr.

This is a common problem in 3300/2230/2870 etc. Its only because of low quality of drum and pcr.
Whenever u get this problem, see there on drum and pcr carefully for spots at both ends.

Also u can extend your ordinary drums life by sticking one round of athesive tape ( cello tape) on the drum at both ends where spacer rollers attach to drum.