Good scan of the original service manual. All schematics and adjustment procedures are there. It helped me to fix a long lasting problem with the tracking circuitry. The manual also includes the supplementals 1,2 and 3. Included are; electrical schematic's , pcb layout's, mechanical drawing's and exploded views, disassembly manual and maintenance procedures. 236 pages.
I will use "Owner Manual" again a second time.
Text excerpt from page 5 (click to view)
Install diode on the main board (component side), solder to resistor R689 (figure 1) with a long wire connected to resistor R903 on the standby power-supply board (foil side), see figure 2
NEW DIODE 1N4148 CATHODE FACING R689 WIRE FROM DIODE ANODE