HP 8562E Service Manual page 225

The jumper on A2J12 is shipped from the factory in the WR PROT (write protect) position
(jumper on pins 2 and 3). When the jumper is set to the WR ENA (write enable) position
(jumper on pins 1 and 2), an additional service cal data menu is displayed under [CAL).
Figure 7-3 illustrates those areas of the service cal data menu that are available.
7-6 General Troubleshooting