Sony MHC-GX555 Operating Instructions Manual page 26

Press ILLUMINATION on the unit.
Each time you press the button, the power
illuminator changes cyclically as l\_llows:
MHC-GX555/RG575S/RG475S/RG470
PATTERN 1--_ PATTERN 2 --_ PATTERN 3
---+ 1LLUM OFF
MHC-GXa551RG2551RG2701RG170
1LLUM ON _-+ 1LLUM OFF
Press DISPLAY while listening to the radio.
Each time you press the button, the display
changes cyclically as l\_llows:
Station name j) --+ Preset number 2) and
li'equency --+ Clock display (for eight seconds)
--+ Effect status
1/European model only
2) Preset number is displayed only if you preset radio
stations (page 14).
26 GB