Keithley 7012-S Service Manual

Table
3-10. Display Circuitry
Checks
Step Item/Component
Required
Condition
Remarks
1 P24, pin 15
and 16
+5V,
±5%
+5V
supply
2 U5, U6,
U9
and
U1O; Variable
pulses
Segment drivers
OUT1 thru
OUT8
3
U4, pins
4-7, 1447
Variable
pulses
Digit drivers
U7, pins 47, 14-17
U8,
pins 4
and
5
4 P24, pin
10
Depress
any switch located in first
column of Pulse present when button
pressed
switch array on
schematic (236-116).
5 P24, pin
9 Depress
any switch
located in second
column. Pulse present when
button pressed
6 P24, pin
8
Depress any switch
located in third
column. Pulse present when
button pressed.
7
Depress
any switch located in
fourth column
SECTION
3
Maintenance
3-18

Keithley 7012-S Specifications

General

Brand	Keithley
Model	7012-S
Category	Measuring Instruments
Language	English