Digitaltroubleshooting - Keithley 181 Service Manual

MAINTENANCE
MODEL 181
5.33. Digital Troubleshooting
1 Monitor the clock on the $2 Line (Pin 37 or UlO91 lor a
1MHr square wave.
5-34. (2413 Installation
Use Figure 5~23 lo install the matched J-FET pair (Keithley P/N
308091 in PC~526.
Figure 5-23. Q413 Installation
5-14