Matrix Orbital PK162-12 - Manual (Page 8)

1. Turn off the display
2. Put a jumper on pins 3 and 4 of the keypad connector (C3 and R1)
3. Power up the display. The baud rate is now set to 19,200
4. Remove the jumper and change the RS-232 port settings to the desired baud rate
5. Turn off the display
6. Power up the display
Refer to the "Set RS-232 port speed" command for acceptable baud rates.
Figure 2: Manual Over-ride
Place jumper on the above pins.
1.8 Memory Chip Lock Down
The display uses a memory chip to store speed, start up screen contrast, I 2 C setting and other settings.
When everything has been changed to the desired settings and the unit is in a finished product or in the field,
locking down the memory chip so no settings can be changed might be desirable. This is only to be done
by knowledgeable people. Any damage to the display by this procedure resulting from user error will not be
covered under the Manufacturer’s Warranty.
Figure 3: Unlocked & Locked
Matrix Orbital PK162-12 4