Subject:
Re: I killed my Epson perfection 1260 photo. Twice.
From:
Gerhard Jaeger ####@####.####
Date:
24 Oct 2002 09:56:31 -0000
Message-Id: <200210241155.09300.gerhard@gjaeger.de>
On Donnerstag, 24. Oktober 2002 11:31, Gene Heskett wrote:
[SNIP]
> From the clues here, where most have reported it went dead in the
> middle of a scan, no light, no motor, no nothing and the carriage
> is left sitting in mid-scan, darned near the only thing this old
> troubleshooter with 50 years of experience in electronics can
> believe is that the PSU died.
But if the PSU dies, this can be checked easily! Or is that PSU a built-in
one? All my Merlin scanners (Plustek, HP, Musktek) used have an extra
PSU outside the device. So it's possible to replace it quickly.
> I do know that my scanner makes a lot more noise in some modes using
> the plustek backend compared to the noise it makes when using the
> epson GT-7200 backend from iscan, which BTW I've yet to be able to
> fully compile, it always barfs on the iscan gui here. Anyway, the
> increased noise level would tend to make me think the motor is
> being driven both harder, and possibly a bit out of phase.
This noise can be corrected by finding out the correct values experimental.
The tables inside plustek-devs.c define different ranges for clock-divider,
PWM and PWM-duty:
The EPSON currently used the following table:
{ MODEL_NOPLUSTEK_1200, 1, 48, 6,
/* Motor settings (PWM and PWM_Duty) */
/* <=75dpi <=100dpi <=150dpi <=200dpi <=300dpi */
{{ 1, 48 }, { 1, 48 }, { 1, 48 }, { 1, 48 }, { 1, 48 },
/* <=400dpi <=600dpi <=800dpi <=1200dpi <=2400dpi */
{2, 48 }, { 8, 48 }, { 2, 48 }, { 1, 48 }, { 1, 48 }},
/* Color mode MCLK settings */
{ 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 4.0, 4.0, 5.5, 5.5 },
/* Gray mode MCLK settings */
{ 5.0, 5.0, 5.0, 5.0, 5.0, 6.0, 6.0, 6.0, 6.0, 6.0 }
},
It think at least the 1200 dpi values may need to be corrected,
but as long as I don't have any test device, I need some feedback...
Maybe we can realize the plan to meet Reinhard in November to
torture his 1250 ;-)
Cheers
Gerhard
