HP 5065A Operating And Service Manual page 355

MANUAL CHANGES MODEL 5065A (05065-9041)
SERIAL PREFIX OR
SERIES NUMBER CHANGES
Page 8-71, Figure 8-26. A19 Clock Display Assembly:
All Serials >Change part numbers at top of A19A2 schematic to
(05061-6125 for OPTION 001) and (05061-6136 for OPTION
003).
>Delete connection between collector of A19A1Q3 and A19A1U2
pins 11 and 14.
>Connect A19A1U2 pins 11 and 14 to board common.