HP 8112A Operating, Programming And Servicing Manual page 339

Change 5
Microprocessor Board
6
Change
Main Board
7
Change
Microprocessor Board
A faster IC was substit:uted to improve reset after power interruption.
For instruments with serial numbers 2136G00354 and lower, make the
following changes to the appropriate parts-list :
In Appendix A, Table A-5 modify:
A3 08 116-66523 U35
Component changes were made to improve slope stability.
For instruments with serial numbers 2 136G00374 and lower, make the
following changes to the appropriate parts-lists:
In Appendix A, Table A-3 modify :
Al 081 1 2-66501 R437
In Appendix A, Table A-3 delete :
Al 08 112-66501 R325 to R329
This change was to clarify incorrect labelling on the ROM ICs. No
change action is required, however do not order replacement ICs as
detailed in the fi r st table below. Use the correct numbers given in
the second table.
In Appendix A, Table A-5:
A3 08 1 16-66523 U5
Reference Description
IC SN74LS04
Reference Description
RES 16 .2D 1% .5 0698-7265
Reference Description
Faulty la bels to disregard
Reference Description
ROM
U6 ROM
U7 ROM
us
ROM
U9 ROM
HP Part #
1820-1199
HP Part #
HP Part #
HP Part #
081 12-10001
081 12-10002
081 12-1 0003
081 12-10004
08112-10005
Backdating B-5