Started by eidis, June 06, 2014, 03:36:30 PM
Quote from: jetblue on June 07, 2014, 12:47:10 PMhi,ive done some work on the marty and post about it here. currently im trying other panasonic lasers on it to see if it takes. a laser similar to the one on it has but i fear it wont work. ive worked on fm towns before, the round vertical drive unit,and it has a common panasonic laser. i always thought the future for the fm towns would be like the 3do and amiga cd where a memory card interface would be invented eliminating the laser drive all together. but a universal replacement would be most ideal. a common panasonic drive of the era is this:http://www.ebay.com/itm/Panasonic-PCMCIA-SCSI-CD-ROM-KXL-D720-/251350066007?pt=US_CD_DVD_Blu_Ray_Drives&hash=item3a85a1a357a Panasonic PCMCIA SCSI CD-ROM KXL-D720ive seen others messing with vintage pc's finding a way to integrate that unit in them one way or another. i read its easier than the others. not sure how and why but may be worth looking into. il dig up more of my notes and share.good luck on this worthy venture.
Quote from: jetblue on June 11, 2014, 05:27:28 AMits been over 5 years and i lost contact with that customer in argentina but last i heard it worked but his power supply died on him so he was stalled from stress testing the laser. i have another laser i think if we can find a volunteer.
Quote from: Tw3ek on July 08, 2014, 05:40:53 AMI actually have an FM Towns 2F model on the way with a dead laser if you were still seeking volunteers. Everything else works fine, just issue with the CD-Rom drive.
Quote from: SuperDeadite on August 25, 2014, 02:51:10 PMSounds like the drive closed switch has gone bad. If you have an older Towns where the ribbon cables are soldered, it is quite a project. BlueBMW fixed a Towns with this issue, he's the one to talk to.
Quote from: BlueBMW on August 26, 2014, 01:27:31 AMThere are actually two drive closed / open switches. One is a physical switch that is tripped by the door itself and the other is behind the button used to open the drive. Basically when you hit the button to open the drive it trips that switch so that the cdrom stops before the lid actually opens. The switches run in series and if either one isnt working right the drive wont read. I had to disassemble both switches and clean their internal contacts. One of them i had to split open to service as it was not designed to be serviced. I had to glue it back together.
Quote from: Jehuty on February 28, 2022, 02:41:12 AMNo, when the laser "doesn´t find" the CD it won´t spin up. So i think your motor is fine. It´s the laser pickup. Normaly the lens would search 2 or 3 times and if it gets the cd the motor spins up.But when not it won´t spin up. With what pickup did you replace the old one ? Aergan postet that the laser from an Technics CH505 should fit.I replaced the laser in one 20F and one CX20 with that from an ch505 and both worked, not 100% but 80 to 90%. Depending on the disc.Look on the PCB, what potis are on the UX Drive ? The Grey Tower got 6 on the pcb.But - don´t touch the Laser Pot on the pickup, it will destroy the laser immediatly !
Quote from: Jehuty on March 04, 2022, 02:54:31 AMyes these 6 you could play with and i think you must when you replaced the laser.I played long time but can´t remeber for sure but i think Focus and tracking gain where the most important when the laser doesn´t find the cd. The others are for fine tuning. Just try all in middle position and then in little steps the two gain in different direction.One of them was to find the CD so the motor starts and on the other you can hear a little noise when the cd is spinning. So you have to turn a little bit back.
Quote from: mattsoft on March 06, 2022, 08:24:13 AMGreat news this afternoon. After lots of searching, I found that the Panasonic SL-PJ316 CD player has the exact same traverse deck as the UX20. Found a working one on eBay. Quick swap of the decks, and... it works! My UX20 is alive and working!