Pioneer PDP-501MX Technical Manual page 73

Step Select CONTRAST.
Remote
'
SET
Step Make adjustments.
Remote
Press the SET button to return to the screen in step 2.
To make other adjustments, repeat steps 2-4.
Step Complete the procedure.
Remote
MENU
Main Unit
ADJUST
PICTURE
'
SET
]
CONTRAST
23 : ADJ.
PICTURE
Main Unit
ADJUST
]
CONTRAST
23 : ADJ.
Main Unit
MENU
]
Restores Normal operating mode.
SET : EXIT
SET : EXIT
Menu Mode
73