The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
This is a great site. I placed my order and by the next am it was available for download. Had some problems with some missing copy on some pages. Once I brought the error to the OMC's attention, the issue was resolved. I'll come back again.
Text excerpt from page 21 (click to view)
8. TO SAVE THE DATA TO OTHER UNIT
It is commonly necessary to save all data stored in the customer's unit before repairing it. For this purpose, you can transfer the data of the JD-6500 or C-320 unit to another unit using the following procedure. (1) To reset the receiving unit Please reset the unit used to receive the data from the customer's unit according to the method mentioned in section 3. (2) To connect transmission unit with receiving unit Please remove the covers of battery compartments from both the transmission unit and the receiving unit, and connect one with another as shown in the figures below: