HP 8112A Operating, Programming And Servicing Manual page 360

6 . Modify the schematic Figure 10.7-4 as shown in Figure B-8.
U30
U34
Figure B-8. 08 1 16-66533: Deletion of W3
7. Figure B-9 shows the microprocessor reset circuit on
microprocessor board 66533, modify the schematic Figure 10. 7-5
accordingly.
+5 v
RESET
Figure B-9. 08 1 16-66533: Reset circuit
B-26 Backdating