Sony MZ-R500PC Service Manual page 17

4. When all the keys on the set and on the remote commander are
considered as OK, the following displays are shown for 4 sec-
onds.
Example1: When the keys on the set are considered as OK:
This set LCD display
8 8 8
5. When all keys were checked or if the upper panel is opened,
the key check mode quits and the test mode (display check
mode) comes back.
RMC OK
MZ-R500/R500PC
17