7-12 Keypad And Keypad Pcb Replacement - Anritsu S412E Maintenance Manual

Chapter 7 — Assembly Replacement

7-12 Keypad and Keypad PCB Replacement

This procedure provides instructions for removing and replacing the keypad and the keypad PCB.
1. Open the case as described in
2. Remove the Main/VNA PCB assembly from the front panel as described in
Replacement".
3. Perform Step 1 through Step 4 of
4. Remove the 8 screws and the cable connectors to remove the Keypad PCB
Keypad is located under the Keypad PCB.
Rotary Knob
Encoder
Touch Screen
Connector
Keypad Switch
Connector
Backlight PCB
Connector
Keypad PCB (Remove 8 Screws)
Figure 7-17. Front Panel Keypad Bezel
5. Reverse the above steps to install the replacement Keypad and/or Keypad PCB.
6. The Keypad PCB stores the touchscreen calibration data. If the Keypad PCB is replaced, then a
touchscreen calibration must be performed. If no touchscreen calibration data is stored in the new
Keypad PCB when powering on a unit, it will stay at the boot up screen with the Anritsu logo shown and
a message at the bottom of the screen stating:
Failed to load touchscreen calibration data. Please reboot the instrument.
If this message is displayed, power off the unit and power the unit up in bootstrap mode by pressing and
holding down the Shift - 4 - 0 keys while pressing the power on button. Now the unit will boot up in
bootstrap mode and prompt you to perform a touchscreen calibration. After following the on-screen
calibration directions, power the unit off and it will boot up correctly on the next power cycle.
7. If the Keypad PCB was replaced with a PCB that has touchscreen calibration data, the unit will boot up
properly, but the touchscreen calibration data will be invalid. Perform a touchscreen calibration by
pressing the Shift key and then 0 key, and follow the touchscreen calibration directions on the screen.
S412E MM
Section 7-2 "Opening the S412E
Section 7-10 "LCD Assembly
Speaker
PN: 10580-00324 Rev. N
7-12 Keypad and Keypad PCB Replacement
Case".
Section 7-3 "PCB Assembly
Replacement".
(Figure 7-17). The Rubber
Touch Screen
7-15