plustek: Thread: driver killed my Epson 1260... and I repaired it :-)

Hi!

During some test with the plustek-driver from sane-1.0.9 with xsane I killed 
my Epson 1260 scanner. The device was dead. The green frontpanel LED did not 
work.

I opend the device (2 skews backside) and checked the connector PCB. F2 (a 
SMD-fuse) was defect. It is labeled with "FK". Sorry, I don't know anything 
about technical data of this fuse, so  I changed it with something I had at 
home (250V/1A T) and adopt it to the SMD pads.

After this the scanner works again.

My test results so far:

Driver works perfect with any mutiple of 75dpi to 1200dpi.
Choosing something like 800dpi the steppermotor is very noisy and scan-process 
very slow. I killed my scanner, when make a 2400-dpi scan. (Ok, ok its a 
1200dpi device but xsane offers me that resolution and I was curious :-)

Bye

  Thorsten

Hi,

On Sunday, 8. December 2002 03:35, Thorsten Schnebeck wrote:
> Hi!
>
> During some test with the plustek-driver from sane-1.0.9 with xsane I
> killed my Epson 1260 scanner. The device was dead. The green frontpanel LED
> did not work.

oops! 

>
> I opend the device (2 skews backside) and checked the connector PCB. F2 (a
> SMD-fuse) was defect. It is labeled with "FK". Sorry, I don't know anything
> about technical data of this fuse, so  I changed it with something I had at
> home (250V/1A T) and adopt it to the SMD pads.

Good hint,

>
> After this the scanner works again.
>
> My test results so far:
>
> Driver works perfect with any mutiple of 75dpi to 1200dpi.
> Choosing something like 800dpi the steppermotor is very noisy and
> scan-process very slow. I killed my scanner, when make a 2400-dpi scan.
> (Ok, ok its a 1200dpi device but xsane offers me that resolution and I was
> curious :-)

2400dpi can be peroformed with motor-steps, the y resolution woll be inter-
polated.

In the meantime I have a 1260 Photo here an check all the settings within
the next days (if I find some time). 

Gerhard

Ok...

So I didn't notice the warnings.
All of these posts about killing the Epson 1260.

Went ahead, patched things, compiled up the drivers, got
several beautiful scans...then my Epson 1260 died.

Definitely there should be a warning regarding this in the driver docs.

Anyway, having found Thorstens post I went ahead and soldered some leads 
across F2 and hooked up an ancient ammeter I had sitting around.
What do you know, the scanner seems to be working fine.

Some observations:
During preview scan or just seeking the "head", my (old,analog) ammeter 
reads about 1.4 to 1.5 `A.
100-800 DPI, motor running smoothly gives about 1.5A.
During a 2400 DPI scan, it seems very "choppy" (you can hear each step 
of the stepper motor) and averages about 1.7A !
1200 DPI gives about the same, maybe 1.6A

Interestingly, the PS is rated at only 1.2A. (ammeter might be off a 
little, but the relative readings should still be meaningful)

Is it possible that the driver is stepping in a way that draws too much 
current ? Transients and motors are always problematic...

Interesting that there was a big sticker on the scanner stating that 
plugging it into your PC without loading all of the (windows) drivers 
would result in damage!

Anyway, thanks for any insight you can give!
-- 

  Matt Martin
####@####.####
600 West Grove Parkway  #1042,Tempe, AZ, 85283
Visit my homepage at http://matthewmartin.org

Hi Matt,

On Freitag, 20. Dezember 2002 10:40, Matt Martin wrote:
> Ok...
>
> So I didn't notice the warnings.
> All of these posts about killing the Epson 1260.
>
> Went ahead, patched things, compiled up the drivers, got
> several beautiful scans...then my Epson 1260 died.

SORRY - again! I'll put some warning to the download page within
the next days...

>
> Definitely there should be a warning regarding this in the driver docs.
>
> Anyway, having found Thorstens post I went ahead and soldered some leads
> across F2 and hooked up an ancient ammeter I had sitting around.
> What do you know, the scanner seems to be working fine.
>
> Some observations:
> During preview scan or just seeking the "head", my (old,analog) ammeter
> reads about 1.4 to 1.5 `A.
> 100-800 DPI, motor running smoothly gives about 1.5A.
> During a 2400 DPI scan, it seems very "choppy" (you can hear each step
> of the stepper motor) and averages about 1.7A !
> 1200 DPI gives about the same, maybe 1.6A
>
> Interestingly, the PS is rated at only 1.2A. (ammeter might be off a
> little, but the relative readings should still be meaningful)

It's strange, that the motor needs that much current!
Have you tested with the SANE-1.0.9 package only or have you already
patched with plustek-0.45TEST4 from the download page?

In the meantime I've logged some stuff and found out, that the motor
settings were completely out of range...
For me now the scanner works - at least the TPA modes are not checked
so far...

>
> Is it possible that the driver is stepping in a way that draws too much
> current ? Transients and motors are always problematic...
>
> Interesting that there was a big sticker on the scanner stating that
> plugging it into your PC without loading all of the (windows) drivers
> would result in damage!

No idea why - maybe it's a Windoze related problem (at least when there
are other drivers for LM983x based scanners installed)...
On my Linux box the scanner is attached during startup and there's no problem
so far. The init sequences are done here by the backend (iscan or plustek)...
During power up, the device should be in a save mode...

>
> Anyway, thanks for any insight you can give!

Thank you for testing
  Gerhard

Did you kill it twice?  Or is the 2400-dpi scan what killed it 
originally?

Andres


Subject: driver killed my Epson 1260... and I repaired it :-)
From: Thorsten Schnebeck
Date: Sun, 8 Dec 2002 03:35:11 +0100
Hi!

During some test with the plustek-driver from sane-1.0.9 with xsane I 
killed
my Epson 1260 scanner. The device was dead. The green frontpanel LED 
did not
work.

I opend the device (2 skews backside) and checked the connector PCB. F2 
(a
SMD-fuse) was defect. It is labeled with "FK". Sorry, I don't know 
anything
about technical data of this fuse, so  I changed it with something I 
had at
home (250V/1A T) and adopt it to the SMD pads.

After this the scanner works again.

My test results so far:

Driver works perfect with any mutiple of 75dpi to 1200dpi.
Choosing something like 800dpi the steppermotor is very noisy and 
scan-process
very slow. I killed my scanner, when make a 2400-dpi scan. (Ok, ok its a
1200dpi device but xsane offers me that resolution and I was curious :-)

Bye

   Thorsten

As Thorsten does not answer, I'll try...

the problem seems to be, that under certain conditions, the motor consumes
too much current and thus the fuse gets blown. As Epson knows this,
they had the posibility to fix that in their driver, but we had to figure out
the correct settings by testing and in the fist approach we failed :-(

This behaviour has been fixed in later backend versions...

Ciao,
  Gerhard



On Monday 03 May 2004 01:13, Maurice Andres wrote:
> Did you kill it twice?  Or is the 2400-dpi scan what killed it
> originally?
>
> Andres
>
>
> Subject: driver killed my Epson 1260... and I repaired it :-)
> From: Thorsten Schnebeck
> Date: Sun, 8 Dec 2002 03:35:11 +0100
> Hi!
>
> During some test with the plustek-driver from sane-1.0.9 with xsane I
> killed
> my Epson 1260 scanner. The device was dead. The green frontpanel LED
> did not
> work.
>
> I opend the device (2 skews backside) and checked the connector PCB. F2
> (a
> SMD-fuse) was defect. It is labeled with "FK". Sorry, I don't know
> anything
> about technical data of this fuse, so  I changed it with something I
> had at
> home (250V/1A T) and adopt it to the SMD pads.
>
> After this the scanner works again.
>
> My test results so far:
>
> Driver works perfect with any mutiple of 75dpi to 1200dpi.
> Choosing something like 800dpi the steppermotor is very noisy and
> scan-process
> very slow. I killed my scanner, when make a 2400-dpi scan. (Ok, ok its a
> 1200dpi device but xsane offers me that resolution and I was curious :-)
>
> Bye
>
>    Thorsten