Apple Lisa 2/10 - Progress

By platter I meant the flywheel which turns the disk. Actually what I said was misleading. It doesn't go through the circuit boards. Actually the top circuit board is wrapped around the wheel while the bottom one is actually underneath is. I've taken some pictures... http://www.classic-computers.org.nz/temp/lisa2-10-front-of-drive-800x600.jpg http://www.classic-computers.org.nz/temp/lisa2-10-bottom-of-drive-800x600.j… http://www.classic-computers.org.nz/temp/lisa2-10-bottom-of-drive-circuit-b… I've looked up the ICs on the bottom circuit board. Apart from the microprocessor(?) these are: sn74ls26n - QUAD 2 -INPUT NAND BUFFER mc3470ap- Floppy Disk Read Amplifier System UPa2003c - NPN SILICON EPITAXIAL DARLINGTON TRANSISTOR ARRAY 8402 - rectifier? 74ls05n - Hex inverters with open collector outputs 14-PDIP 0 to 70 74ls04n - Hex inverter sn75452BP - Dual Very-high Speed, High-current Peripheral Drivers ne592n - differential video amplifiers Would one of the last two be the ones controlling the motor? By snooping around I've managed to find a service manual for the OA-D32V 400k drives on bitsavers. However, this covers an earlier model. The Lisa 2 has a OA-D34V and (as far as I can see) the circuit board at the bottom is quite different. I'm not techo though, and I struggle to understand what's written there. There may be hints but I can't interpret them. The manual is at http://bitsavers.org/pdf/sony/Sony_OA-D32_Microfloppy_Service_Nov83.pdf I will re-read it again and see if it points to anything I can look at. There is a troubleshooting chart but you seem to need some test equipment. I appreciate your continuing suggestions, Tony and others. They are keeping me from giving up entirely. Terry ----- Original Message ----- From: "Tony Duell" <ard at p850ug1.demon.co.uk> To: <cctalk at classiccmp.org> Sent: Tuesday, February 08, 2011 9:53 AM Subject: Re: Apple Lisa 2/10 - Progress