Display Mode - Sharp QA-1650 Service Manual

9.2.Key data and their functions
IC2(MPU) always outputs the signals from pin53(PD4), 52(PD3), and 51(PD2) of the SWITCH P.W.B. to monitor
if keys are pushed or not. M.P.U. can distinguish which key is pushed from pin5(PB7) and 6(PB6) signals.
1.MENU key
It switches the following setting mode.
(1)Video mode
r LCD ADJUSTMENT MODE
-> VIDEO ADJUSTMENT MODE
—~ DISPLAY MODE
cai
(2)Computer mode
ie LCD ADJUSTMENT MODE -> DISPLAY MODE 7
2.SLCT key
It selects the adjustment or setting item in the selected mode by menu key. Selected characters are inverted.
3, +, — key
They enter the data in the selected item by SLCT key. They adjust the picture quality when LCD ADJUSTMENT
MODE or VIDEO ADJUSTMENT MODE is selected, and select parameters when DISPLAY SETTING MODE is
selected respectively.
4.RESET key
It sets the data for connected computer and composite video picture quality to initial setting value.
9.3.RESET circult
33