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 94 (click to view)
3-3. Troubleshooting (BKDS-7015) 3-3-4. Test Procedures
(3) Checking the test result Check the followings on each item of the �AND test�. (a) �1. Fill AND MEMORY with W.� Check that all alphanumeric displays are filled with the letter �W�. (b) �2. Fill AND MEMORY with M.� Check that all alphanumeric displays are filled with the letter �M�. (c) �3. Fill AND MEMORY with BLANK.� Check that all alphanumeric displays light off. (d) �4. Fill AND MEMORY with FULL.� Check that all dots of all alphanumeric displays light up. (e) �5. Lum level = 3� Check that it is possible to adjust the brightness level 3 model (the 1st brightness). (f) �6. Lum level = 2� Check that it is possible to adjust the brightness level 2 model (the 2nd brightness). (g) �7. Lum level = 1� Check that it is possible to adjust the brightness level 1 model (the 2nd darkness). (h) �8. Lum level = 0� Check that it is possible to adjust the brightness level 2 model (the 1st darkness). (4) Ending the �And test� Press your required terminal button to return to the �H/W Tester on CPU-246� menu.