Okay, thats strange. I Overreaded the good RF signals... Video signal
for RF is made from RGB signals by MC 1377P chip, but Scart has some
additional signals and supplies ölike +12V for switching to RGB. Maybe
the +12V are too weak. Please check the voltage of +12Volt. Check also
the condensators in PSU and SAM.
LCD
Am 24.01.2012 19:13, schrieb Aleš Keprt:
If you use the original floppy drive and have got power problems, you
can simply call an electrician to repair your original power supply.
You don’t need to replace it. Every normally skilled repair man will
repair it.
I just wonder how it is possible to see problems on scart caused by
power supply problems, and have RF image good at the same time.
*From:* Andrew Gillen <mailto:a...@joua.net>
*Sent:* Tuesday, January 24, 2012 6:44 PM
*To:* sam-users@nvg.ntnu.no <mailto:sam-users@nvg.ntnu.no>
*Subject:* Re: Drive/SCART fault?
Hi LCD
Thanks, that's good to know it is just a PSU fault. The drive is the
original drive that shipped with the SAM back in '91.
Is this something I should approach Quazar with, or is it something
that can be resolved easily by someone as inept as me with
electronics? I'd like to keep the original SAM supply really for
aesthetic value.
Cheers
Andrew
*From:* Leszek Chmielewski <mailto:retr...@gmail.com>
*Sent:* Tuesday, January 24, 2012 12:21 AM
*To:* sam-users@nvg.ntnu.no <mailto:sam-users@nvg.ntnu.no>
*Subject:* Re: Drive/SCART fault?
Am 24.01.2012 01:01, schrieb Andrew Gillen:
Anyone experienced any issues whereby accessing the floppy drive
causes the display to corrupt? It starts off with the left hand side
phasing off in jagged lines, then eventually the entire screen goes
blank. When the drive has been shut off the display returns. This
only effects the video signal from the scart socket - RF works
absolutely fine.
Cheers
Andrew
Sure, the PSU supples not enough ampere or the drive (replaced?)
consumes too much. I had similar issue with replacement drive, and
after building new PSU all works fine.
Cheers
LCD
