HP 8112A Operating, Programming And Servicing Manual page 346

Change 1 7
Main Board
Change 1 8
Note
B-12 Backdating
In Appendix A, Table A-3
Reference Description
Al 081 1 2-66501 C415
Component value changes were introduced to improve linearity.
For instruments with serial number 2343G01855 and lower make the
following changes to the appropriate parts-lists:
In Appendix A, Table A-3
Reference Description
Al 081 12-66501 C240
R7
In Appendix A, Table A-3
Reference Description
Al 08112-66501 * R7
Component value changes were introduced with a change in dual
transistor supplier. Glass spacers were fitted to the leads of R419, to
increase inductance and the ferrite bead was discarded from Q400.
This change is associated with change 15 and change 24.
For Instruments with serial number 2343G01930 and lower make the
following changes to the appropriate parts-lists:
delete:
Capacitor 220 pF 0160-5731
modify:
Capacitor 10 pF 0 160-3874
Resistor 4.87 k 0698-4444
delete :
Resistor 4.42 k 0698-4442
HP Part #
HP Part #
HP Part #