S3xxE MM PN: 10580-00253 Rev. J 7-1
Chapter 7 — Troubleshooting
7-1 Introduction
This chapter describes the primary troubleshooting operations that can be performed by all Anritsu Service
Centers. Perform the troubleshooting suggestions in the order they are listed. Operators of the MP1026B
should refer to the User Guide for troubleshooting help.
Only qualified Anritsu personnel should replace internal assemblies. Major subassemblies shown in Table 1-4,
“List of Replaceable Parts” on page 1-4 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 shields will detune sensitive RF circuits and will result in
degraded instrument performance.
7-2 Turn-on Problems
Unit cannot boot-up, no activity occurs when the On/Off key is pressed:
1. Battery may be fully discharged. Confirm the battery is installed into the unit and connect the AC to DC
converter (Anritsu part number 40-187-R) to the unit allowing the battery to charge.
2. Battery may be the wrong type. Use only Anritsu approved battery packs. Some non-approved battery
packs will fit into the MP1026B, but are electrically incompatible and will not charge correctly.
3. External power supply may have failed or be the wrong type. Replace the external power supply.
4. The On/Off switch is damaged. Replace the keypad PCB or rubber keypad.
5. The Main PCB has failed. Replace the Main PCB/Spectrum Analyzer assembly.
Unit begins the boot process, but does not complete boot-up:
1. Using Master Software Tools, perform the Emergency Repair procedure, then update the system software
(via the Tools menu).
2. During the boot-up process, the unit stops with the message:
Failed to load touch screen calibration data. Please reboot the instrument.
a. Power the unit off and boot up in boot strap mode (hold down the Shift - 4 - 0 keys while pressing
the power on button).
b. In 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, and then power cycle the unit.
c. Once the unit boots up, ensure the firmware version is 1.30 or greater. If not, load the latest
firmware and perform a touch screen calibration.
3. The Main PCB has failed. Replace the Main PCB/Spectrum Analyzer assembly.
Unit makes normal boot-up sounds, but the display has a problem:
1. If the display is dim, check the brightness setting under the System Menu / System Options.
2. Replace the Backlight Driver PCB.
3. Replace the LCD assembly.
4. The Main PCB has failed. Replace the Main PCB/Spectrum Analyzer assembly.
Boot-up Self Test fails:
1. Perform a Master Reset.
2. Verify the date and time are correct on the unit.
3. The Main PCB has failed. Replace the Main PCB/Spectrum Analyzer assembly
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