The service manual is really great - thanks to it I was able to install the laser unit and thus "save" my CD-player, which seemed to be impossible before I had the manual.
Complete manual as pdf-file in very good quality. Very helpful and fast availability.
Text excerpt from page 46 (click to view)
SA-PT150E / SA-PT150EB / SA-PT150EG
Step 2 Raise the mecha chassis vertically. Step 3 Slide the lever in the arrow direction till it stops and pull the tray out.
l(Assembly of the tray unit) Step 1 Insert a part of the tray into the unit sliding over the groove on the mecha chassis. Step 2 Insert the tray to the point before the tab of the mecha chassis.
Step 4 Spread the tabs at the both sides and pull the tray out. (The tray slides a little forword and stops.).
Step 3 Hook the drive arm concave phase over the tray and the tray slider. Step 4 Press in the tray. Step 5 Make sure that the tray and the drive arm move smoothly.
Step 5 Remove the drive arm concave phase from the tray slider and tray.
