Service manual

Model 5304A
Circuit Diagrams
Table 9D-8-1. Instrument Interconnection List
PIN NO.
SIGNAL NAME
DESCRIPTION
35 NO CONNECTION
p-36
^37
DIGIT ADDRESS X
p-36
^37 DIGIT SELECT X
Digit address code X, Y, Z from the display scanner indicates
a digit being displayed.
[•*38
DIGIT ADDRESS Y
^39
p-40
*•41
DIGIT SELECT Y
DIGIT ADDRESS Z
DIGIT SELECT Z
DIGIT select code X, Y, Z is the corresponding code which selectes
the digit at the output of the counter. If the main frame
counter is displayed directly the corresponding lines of the digit
address code and the digit select code are connected together.
42 NO CONNECTION
43
44
NO CONNECTION
NO CONNECTION
44 NO CONNECTION
45
NO CONNECTION
46 *
DP3 Ix)W signal activates decimal point 3.
47 *
DF4
Low signal activates decimal point 4
48 * I)P5
Low signal activates decimal point 5.
49
NO CONNECTION
j^50
DC IN DC power to power supply from battery pack or from 22 volt input
power from pin 25.
L25
*=Source
9D-8-U