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 Sent: Tuesday, January 24, 2012 12:21 AM To: 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
Re: Drive/SCART fault?
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 Sent: Tuesday, January 24, 2012 6:44 PM To: 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 Sent: Tuesday, January 24, 2012 12:21 AM To: 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
Re: Drive/SCART fault?
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
Re: Drive/SCART fault?
I renewed my PSU last week. Look here: http://www.keprt.cz/sam/psu.php Although I think 12 Volt line is not used for actual scart output, bad el.capacitors can of course cause almost any kind of evil in electronic devices. Aley From: Leszek Chmielewski Sent: Tuesday, January 24, 2012 7:23 PM To: sam-users@nvg.ntnu.no Subject: Re: Drive/SCART fault? 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 Sent: Tuesday, January 24, 2012 6:44 PM To: 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 Sent: Tuesday, January 24, 2012 12:21 AM To: 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
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
