This is exactly what I needed This was a hard one to find and I had already downloaded several for other Panasonic radios but none matched my radio.
Although my radio is the LBE model the LBS is the same.
A very good quality manual with every thing you should get in it
Text excerpt from page 1 (click to view)
SCHEMATIC DIAGRAMS
AUDIO/VIDEO CONTROL RECEIVER
RX-5042S
CD-ROM No.SML200403
Area suffix J ----------------------------- U.S.A. C -------------------------- Canada
Contents
Block diagram Standard schematic diagrams Printed circuit boards 2-1 2-3 2-15 to 21