HP 8112A, Operating, Programming And Servicing Manual

Page: 352 / 406

Change 30
Change 3 1
Change 32
Note
For instruments with serial number 2522G03269 and lower.
Introduced a new main board with changed board layout. This was
caused by substitution for relay type that was no longer available.
Board Al 081 12-66501 rev E changed to rev F . Newer board type can
be recognized by fuses Fl and F2 which are mounted in clips.
Alternative component value selection, improved linearity of Period,
Delay and Width adjustment.
For instruments with serial number 2522G03480 and lower, make the
following changes to the appropriate parts-lists:
Main Board
In Appendix A, Table A-3
delete:
Reference Description
HP Part #
Al 08112-66501 C200 Capacitor 12 pF 0 160-4521
New heat sink introduced by metrication. Components added to
improve switch-on reset conditions.
For instruments with serial number 2522G041 30 and lower, make the
following changes to the appropriate parts-list:
Main Board
In Appendix A, Table A-3
modify :
Reference Description HP Part #
Al 081 12-66501 MP505,506, and
MP508 to 513 HT-SINK SGL 1205-0329
For instruments with serial number 2522G041 05 and lower, make the
following changes to the appropriate parts-list:
Microprocessor Board
In Appendix A, Table A-5
delete :
B-18 Backdating
Reference Description
A3 081 16-66533 CR5
Q2
R22,23
HP Part #
8 159-0005