The purchased manual is an scan of the original Panasonic paper-based Service Manual. Unfortunately the contrast is not perfect, but I am satisfied anyway!
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.
Text excerpt from page 6 (click to view)
KRC-478R/RV/RY/RYV
TEST MODE
1. How to enter the test mode � Reset the unit while holding the �FM� key and preset �6� key. � All indication segments go ON at the beginning of the test mode. 2. How to check the test mode � Cancel the blank skip (B.S). � Push the �ATT� key. � The eject function works. 3. How to release the test mode � Simply reset the unit. � (NOTE) The test mode is not canceled by ACC OFF, power OFF, momentary power down or the panel off. 4. Audio adjustment � Set the volume level to -10dB (which is shown as �30� on the display). � Loudness OFF. � The BASS/TREBLE and BALANCE/FADER can be set to the full-boost/full-cut and full-front/full-rear each by pressing the �Track UP� / �Track DOWN� keys. � Sound coordination doesn't appear for the feed.
