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 12 (click to view)
Removing the gear base arm / gear base link assembly (See Fig.27 to 29)
1. Move the gear base arm in the direction of the arrow. 2. Insert a slotted screwdriver to the gear base spring under the gear base arm, and release the gear base arm upward from the boss on the gear base assembly. 3. Remove the gear base arm from the main chassis while releasing the two joints v. 4. Move the gear base link assemby in the direction of the arrow to release the two joints w.
Gear base link assembly
Gear base arm Joints v
Hook x FFC pad Hook x
Fig.27 REFERENCE: When reattaching the gear base arm, make sure that the boss on the gear base assembly is inside the gear base Gear base spring spring.
Gear base arm Screwdriver
Removing the FFC pad (See Fig.27 and 29)
1. Push each joint hook x of the FFC pad and remove toward the bottom. Fig.28