Sharp PC-1251 - Page 9

8
h5 = 0
h 5 =1
all O FF ( DiS = L)
V A L
V BH
D isp l ay ON
V BL VA H
D i sp l ay O FF
V A H VBH
ON ON O N ON O FF O FF O FF O F F OF F OFF O N O N ON O N O N O N ON O N O FF
a l l OFF
vrns = vsr _.
B ack plate ( H1 ) wavefor
V MH -. -- - -- - --- - -- - - - - - - - - -- -- -
Se g me nt Te rm i nal
w aveform
GND= VAH -
h 3( TR 3 )
h 4 ( TR 4 )
h 5 ( TR 5 )
h 1 C TR 1) -- - ------ -- -- - - - -- - - - - - --
h 2 C TR 2 ) - - - - - -- - - -- - -- - - - - - --- - - - - ----.
RE S
DiS
H A
•COUNTER SECT i SN & Segment term i nal waveform
•LCD
POWER
SUPPLY
r- - - - -- -
Vee
VGG ( Ab o ut
6 V )
--l
V oe
L CD CONTRAST
CONTOL
VD i S S 1
--l
Vs
(
CP U
LC D
V M
DRi V ER
I
1 VA
s 62
--l
LJ