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.
The manual was of good quality with high resolution schematic diagrams.
Text excerpt from page 8 (click to view)
RX-6000VBK/RX-6008VBK/RX-6100VBK Removing each board in the front panel assembly (See Fig.17 to 20)
Prior to performing the following procedure, remove the top cover and the front panel. 1. Pull out the volume knob on the front side of the front panel and remove the nut attaching the volume board. 2. Remove the three screws N attaching the volume board on the back of the front panel and disconnect the harness from connector CN411 on the volume board. 3. Remove the ten screws O attaching the system control board and disconnect the harness from connector CN402 on the system control board. 4. Remove the six screws P attaching the operation switch board. Push each tab b of the four joints inward and detach the operation switch board to the front. 5. Remove the screw Q attaching the operation switch board.