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 1 (click to view)
KS-AX4550
SERVICE MANUAL
POWER AMPLIFIER
KS-AX4550
S IO N A TU R E S E R EI S
Area Suffix J Northern America
KS-AX4550 is a model to which the color of KS-AX4500 is changed. Therfore, this service manual is consisting of difference parts list with KS-AX4500. For others, please refer to the service manual of KS-AX4500 (issue No.49622).