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 40 (click to view)
TROUBLESHOOTING GUIDE
NO PLAYBACK PICTURE
Does E-E appear on the Monitor TV ?
No
Is the voltage at pin 55 of IC4001 5V ?
No
Check Power circuit.
Yes
Yes
Is there PB Y/C signal at TP4001 ?
No
Check PB Y/C at pin 74 of IC4001 and the connection of the CYLINDER.