HP 8642A Operating Manual page 300

A s s e m b I y L o c a t o r
S i m p I i f i ed B l o c k Di a g r a m
KEYBOARD
M A I
ON/STB
SWITCH
30<-
LCD
SERIAL <r
IN DATA
LCD
DRIVER <r
INPUTS
SS1
11
LCD PULLUPS
HP-IB
SWITCHES
RPG
SS2
SS"SERVICE SHEET
14
LCD DISPLAY
LCD DRIVERS
SS3
A1A2
KEY­
BOARD
MATHIX
LINES
HP-IB
-> SWITCH
OUTPUTS
-» 49 RPG OIR
-» 50 RPG CHANGE
F i g u r e 8 E - 1 0 0 B D 2 G e n e r a l I n f o r m a t i o n .