You are purchasing a COPY of the complete 52 page service manual for the Realistic model DX-302 quartz synthesized communications receiver. Includes top & bottom view images of all PC boards with component placing and foil tracings. Has a complete parts list and alignment procedures for all the PC board circuitry. Has troubleshooting Christmas Tree diagram charts to aid problem solving and repair. Included is a 11X17 fold out schematic diagram plus an exploded view 11X17 assembly diagram page. This is a very well written manual & this copy is crisp and clear (not fuzzy) so you can read & easily identify all components and their values.