HP 8642A - Page 304

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COL Q
COL 1
p/ol
COL 2
COL 3
COL 4
COL 5
ROW Q
ROW 1
ROM g
ROW 3
ROH 4
ROW 5
ROW 6
ROW 7
14
14
:OL 5
SS1
KEY DWNIL)
XI
A
LCD CLOCK
J-LTL
X2
X3
'IS'
"4"
"2*
"I"
CHES
U\.
SCK ID
CS ALL (L)
C tH) /D <U
RESET LCD (L)
LCD CLK
OISP BUSY ID
LIGHT 2
LIGHT 1
LIGHT COM
510 IH)
SI1 |H)
SI2 tH]
SI3 IH]
SI 4 tH)
SI5 tH)
RPG DIP
-> 3
-> 4
-> 5
~» 6
-> 7
-»47
-* 1
-» 2
-» 3
-» 4
-> 5
-> 6
■^ 7
-* 8
. KEYBOARD
-
>
~\| MATRIX
LINES
> > 'i
4
GD BD4
■^47
-* i
KEY DWN [L)
> GD BD4
HP-IB SWITCH
OUTPUTS
QD) BD4
GD—i G_)
fsn—i GD—
GD—i
DISP BUSY [L]
FH5BD4
LCD LIGHTING
SI0-SI5
-» 9
-» 10
4 H
GD--
P/0|
-MS
RPG CHANGE (L)
RPG DIP
>—GD
BD4
RPG CHANGE (L)
5DBD3,4
10
516(H)
SI7 (H)
SIB(H)
518(H)
~16
/"
SI10 1H)
+5V(F2) (LCD)
^ GND 1 (LCD)
SI6-SI10
SS2
-Ml >
^^
POHER SUPPLY
AND GND
LCD BUSY ID
A1A2 LCD DISPLAY ASSEM!
-> 7 >■
-> 1 >■
-> 5 >■
-» 2 >-
B >
7 >■
B >-
9 >
1 >
P/0
P2
•LIGHT S
P/0
PI
' LIGHT COM
LIGHT 1
P/0
P2
LCD
-» 4 >—-
-* 6 >
SCK (L)
CS ALL (D
P/0
PI
-»2 >--
-> 3 >
' CtW/DtL)
RESET LCD ID
P/0
P2
LCD CLK
P/0
PI
______
SIKH)
SI2 (H]
SI3
10 >—t-
11 >—-
514(H)
SI5 (H)
LCD DRIVERS
P/0
P2
io >—
r
9
>_
r
B >-H-
» 5 >—^
SIB (H)
SI7 (H)
~T
SIB (HI
519(H) J
SI 10 (H)
3 >-+■
+BVIF1L
GND
L-
POWER SUPPLY
AND GND