HP 8112A Operating, Programming And Servicing Manual page 353

Change 33
Change 34
Instrument
Note
Main Board
Control Board
Board edge connectors were changed for improved type with ejector
latches. These provided more secure fastening for the ribbon cable
ends into the board connectors.
Instruments with serial number 2522G04230 and lower will have older
type of connector fitted.
For instruments with serial number 2522G04280 and lower, make the
following changes to the appropriate parts-lists:
Standardisation of rear frame assembly introduced new part number.
Old part in Appendix A, Table A-2 was:
AO 081 1 2 MP8
This change was reversed by change 37 to provide improved
screening. This means if your instrument pre-dates this change,
implement Change 34 and ignore Change 37.
Components on the main board and control board were allocated
alternative values to improve pulse specifi c ation.
In Appendix A, Table A-3 modify:
A l 081 12-66501 c200 *
In Appendix A, Table A-4 modify:
A2 081 1 2-66502 R53
In Appendix A, Table A-4 delete :
A2 081 1 2-66502 R55
Reference Description
FRAME REAR
Reference Description
Capacitor
c220 *
Capacitor
C240 *
Capacitor
Reference Description
Resistor
R54 Resistor
Reference Description
Resistor
HP Part #
5021-5814
HP Part #
12 pF 0 160-452 1
12 pF 0160-452 1
12 pF 0160-4521
HP Part #
4.22 k 0698-3158
4.42 k 0698-4442
HP Part #
4.02 k 0698-3558
Backdating B- 1 9