HP 8112A Operating, Programming And Servicing Manual page 345

Main Board
Change 16
Main Board
In Appendix A, Table A-3 delete :
Al 08 112-66501
overshoo t
,-------
Figure B-1. Example output pulse
Capacitor C41 5 was added between Pin 20 of connector J2 and
ground to provide a cleaner signal at low period times. Other
component value changes were to compensate for slight variations in
dual transistor performance.
For instruments with serial number 2343G0 1 630 and lower make the
following changes to the appropriate parts-lists:
In Appendix A, Table A-3 modify :
Al 081 1 2-66501 R406
In Appendix A, Table A-3 add:
Al 081 12-66501 * R421
Reference Description
C535 Capacitor
* c535
Capacitor
L513 Ferrite bead
/
90%
Ringing
not m o re than
plus/minus 4%
Reference Description
Resistor
R408 Resistor
R421 Resistor
Reference Description
Resistor
HP Part #
47 pF 0160-4387
68 pF 0160-5737
Green 9170-0029
HP Part #
1 .62 k 0757-0428
249n 0698-4421
231n 0698-1221
HP Part #
147 0698-72 16
Backdating B-1 1