Good qulity. Even as it is an old manual (from 1991-1992) it has a good scanned quality and is complete, including user's manual, disassembly intructions, diagrams and schematics, ajustments, troubleshooting and parts list, as usual with SONY manuals and Owner-manuals service.
Text excerpt from page 35 (click to view)
Removing the Power Supply Board
1. 2. Disconnect the two cables and remove the screw from the power supply board. Then, remove the two screws of the power socket on the rear panel of the machine.
3.
Slightly lift up and take away the power supply board.
Removing the DVD-ROM Drive
1. Remove the two screws from each side of the DVD-ROM drive, then remove the DVD-ROM drive.
2.
Disconnect the power cable and the IDE cable from the DVD-ROM drive.