Model MS20xxB MM PN: 10580-00303 Rev. D 7-1
Chapter 7 — Troubleshooting
7-1 Introduction
This chapter describes the primary troubleshooting operations that can be performed. Perform the
troubleshooting suggestions in the order in which they are listed.
Only qualified service personnel should replace internal assemblies. Major sub-assemblies that are shown in
the replaceable parts list are typically the items that may be replaced.
Because they are highly fragile, items that must be soldered may not be replaced without special training.
Removal of RF shields from PC boards or adjustment of screws on or near the RF shields will detune sensitive
RF circuits and will result in degraded instrument performance.
7-2 Turn-on Problems
Instrument Cannot Boot Up
Instrument cannot boot up. No activity occurs when the On/Off key is pressed:
1. Battery may have been fully discharged. Use an external charger (Anritsu PN 2000-1374) to charge a
completely discharged battery.
2. Battery may be the wrong type. Use only Anritsu approved battery packs. Some non-approved battery
packs will fit into the MS2024B, MS2025B, MS2034B, and MS2035B, but they are electrically
incompatible and do not charge correctly.
3. External AC to DC power adapter may have failed or be the wrong type. Replace the external power
adapter.
4. On/Off switch may have damaged. Replace the rubber keypad membrane.
5. Main PCB may have failed. Replace the Main PCB Assembly.
Instrument Cannot Complete Boot-Up
Instrument begins the boot process, but does not complete boot-up:
1. During the boot-up process, the instrument stops with the message:
Failed to load touch screen calibration data. Please reboot the instrument.
a. Power the instrument off
b. Hold down the Shift - 4 - 0 keys while pressing the power on button. This forces the instrument to
boot up in the boot strap mode.
c. In the boot strap mode, the unit prompts you to perform a touch screen calibration. Follow the
on-screen directions until the touch screen calibration is complete.
d. Power the instrument off and then on again. Observe whether the problem is corrected.
e. Once the instrument boots up, verify that the firmware version is 1.50 or greater. If not, load the
latest firmware and perform a new touch screen calibration.
2. Firmware update may not have completed. Reload the firmware.
3. The Main PCB may have failed. Replace the Main PCB assembly.
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