Hitachi 35UX60B - Manual (Page 80)

AUDIO
80
For external speaker with Internal/External switch, sound reproduction is as follows.
(For 35UX60B Only.)
TELEVISION ON SCREEN DISPLAY AND REAR SPEAKER CONNECTION
A On Screen Display Int. Speaker: "ON" -and-
Rear Switch to Int.: Internal Speaker is "ON" -or-
Rear Switch to Ext.: Connect Ext. Speaker first or no sound will be heard. External
speaker in
"ON".
B On Screen Display Int. Speaker: "OFF" -and-
Rear Switch Int. or Ext.: Int. or Ext. Speaker are "OFF"