Philips Fm2 Service Manual
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Chapter 3 - Tests and Error Codes19 3 Tests and Error Codes Service Philosophy If the monitor detects a problem, it displays an error screen that shows an error reference number, and monitoring is discontinued. In addition, the errors are written to the error log (see Table 3, “FM-2 Error Codes,” on page 23). Read the system error log to determine whether the fault lies in the hardware or firmware. These problems can be repaired by board replacement or unit exchange. Do not attempt component-level board repair. Overview of the Service Tests A brief overview of the service tests that are used to verify performance following repairs or during routine maintenance follows. All tests can be performed without removing the covers of the monitor. Visual Test (see page 20) Power-On Self Test (see page 20) Performance tests for transducers, to check the processing of the signal from the transducers (see “Te s t i n g Tr a n s d u c e r s” on page 90) Safety Tests These test the electrical safety of the monitoring system and must be carried out after upgrades and repairs. You must use a safety testing analyzer. –System Safety Test (see page 89) –Safety Test Blocks (see Table 21, “Test and Inspection Matrix,” on page 81)
Checking the Battery 20Chapter 3 - Tests and Error Codes Checking the Battery Before testing the monitor after repair or service, ensure that the battery itself is not at fault. See “Battery Charging and Maintenance” on page 82. Visual Test Visually inspect the monitor and its accessories after a repair, and also on a regular basis as part of routine maintenance. Ensure that the monitor, cables, line cords, transducers and instruments have no visible evidence of damage that may affect patient safety or monitoring performance. Do not use if there is any sign of damage. FM-2 Power-On Self-Test When the monitor is turned on, it automatically performs a diagnostic self-test. The self test continues during normal operation also. If the monitor fails its self test, it will display an error screen, and will discontinue all monitoring functions. In this case, it should be turned off and removed from service. What Happens During the Power-On Self Test The executable program is loaded from flash memory into Random Access Memory (RAM). A checksum algorithm is run to test the program just loaded into RAM. If the checksum test passes, the watchdog timer is started. The purpose of the watchdog is to check that all tasks running concurrently on the monitor are operating correctly.
FM-2 Power-On Self-Test Chapter 3 - Tests and Error Codes 21 The watchdog timer is allowed to time out, and the interrupt expected to occur is verified to have occurred. Software will detect a watchdog failure if the watchdog timer does not expire within a specified amount of time. Performing the Power-On Self Test 1. Press the On/Off button . 2. Initially the LCD screen illuminates, but is blank. 3. After two or three seconds, the monitor plays a two-tone power-on jingle while performing the Power-On Self Test. At this point, the monitor displays the start-up screen, showing the Agilent logo, bootcode version and the application version. 4. Upon successful completion of the Power-On Self Test, the display will show the main monitoring screen. 5. If an error is detected, the monitor will display the error screen. 6. The error number is stored in the error log (see Table 3, “FM-2 Error Codes,” on page 23). If the Power-On Self Test fails, try to cycle power again. If it fails again, then exchange the monitor.
Performance Test for Transducers 22Chapter 3 - Tests and Error Codes Performance Test for Transducers This tests the signal path to and from the transducers. 1. Turn on the monitor and the recorder or printer. 2. Connect one or two US cables and the TOCO transducer. 3. Check that the display acknowledges the connected transducers in the appropriate frames. Also refer to “Testing Transducers” on page 90. Error Handling There are two types of error that you may see: those that the monitor cannot self-detect, and those that it can self-detect. If an operational error occurs that is not self-detected, the monitor shuts down. There will be no audible or visual warnings or indicators. If a self-detectable error occurs, the monitor will do the following: –Display the error screen –Sound an error tone –Discontinue all monitoring functions
Error Codes Chapter 3 - Tests and Error Codes 23 Error Codes The error codes are primarily intended for diagnostic use at the factory. The errors, their explanation, and any service action required are shown in the following table. Table 3 FM-2 Error Codes Error CodeExplanationAction 1 Monitor’s memory has become corrupt Replace the monitor 2 Invalid internal software state in the monitor 3 Unable to acquire a software resource (queue, semaphore, etc.) 4Stack overflow 5 Bad parameter value passed to a function 6 Software is in an unexpected state 7 Software assertion was false (coding error) 8 A task failed to check in with the watchdog timer 9 The CRC of the software in memory is invalid 10 A voltage is out of range Check the battery and the power supply for correct opera- tion. Replace if necessary 11 Watchdog timer is not functioning Replace the monitor 12 System received too many resets 13 Recorders software version number is incompatible with the monitor 14 Flash memory type is incompatible with the software 15 Phase lock loop lost lock (non-critical error) No action required
Error Codes 24Chapter 3 - Tests and Error Codes 16 Failed to allocate requested memory Replace the monitor 17 A problem with the Codec has been detected 18 High half-word of flash failed to program 19 Low half-word of flash failed to program 20 High half-word of flash failed to verify 21 Low half-word of flash failed to verify 30 Error in communications micro-controller Check the side connector PCB. Replace if necessary. 50 Corrupt patient record (trend file) None: factory diagnostic infor- mation only 51 Corrupt file system 52 Attempt to read a deleted file 53 File system wrapped memory 54 Attempt to read a corrupt file 55 Failed to create a file 70 File corrupted - FM-2 viewer communication error None: factory diagnostic infor- mation only 71 Invalid Patient ID - FM-2 viewer communication error 72 Invalid sequence number - FM-2 viewer communi- cation error 73 Remote error - FM-2 viewer communication error 1xx Algorithm errors None: factory diagnostic infor- mation only 2xx Printer errors 3xx Fatal Operating system errors 4xx Fatal processor exceptions Table 3 FM-2 Error Codes Error CodeExplanationAction
Chapter 4 - Power-up Default Settings and the Service Menu25 4 Power-up Default Settings and the Service Menu Introduction This section discusses use of the Power-up Defaults Menu to configure power- on default settings, and the Service Menu to obtain service-related information about the monitor. Power-up Defaults Settings These are parameters which can be changed by the user. The power-up defaults allow you to create a power-up default for many settings in the monitor. Power- up defaults are the settings in effect each time the monitor is powered on. The power-up default settings are configured at the factory prior to shipment. Some of the parameters are stored when the monitor is powered down, and these are classified as “saved through power cycle”. The factory default values are defined in Table 4. Table 4 Power-Up Default Settings Parameter Factory Default Saved Through Power Cycle US trace separation“0”BPMNo TOCO Baseline set-point 5 Yes All alarm settings - Yes Modem: Initialization string -----Ye s Modem: Phone number -----Ye s
Service Menu 26Chapter 4 - Power-up Default Settings and the Service Menu Service Menu The purpose of the Service Menu is to allow factory, field-service, and hospital biomedical technicians access to a series of test and system-related information screens for the purpose of verifying monitor performance or troubleshooting problems. To access the Service Menu, press the navigation knob when the Power Status Frame is selected. The following can be viewed from the Service Menu: Data transfer DisabledYes (if real-time transfer) Data Transfer Destination Recorder/ PrinterYe s Recorder: Paper speed 3 cm/minuteYe s Recorder: Paper style USYe s Time format 12 hour Yes Date“today”Yes Date format mm/dd/yy Yes Patient ID time/date encoded No Language Configured language Yes Table 4 Power-Up Default Settings Parameter Factory Default Saved Through Power Cycle
Service Menu Chapter 4 - Power-up Default Settings and the Service Menu 27 The Service Menu lists the test and system-related information screens. Selection of an item in the menu will invoke that test or information screen. The test and information screens that appear in the Service Menu are as follows: Error Log System Analog-to-Digital (A/D) Values Table 5 Service Menu Entries Menu ItemExplanation View Error Log Displays the error log menu View A/D Values Displays the Analog-to-Digital (A/D) Menu System On-Time Elapsed system on-time (expressed in hours). System on-time is not reset to 0 after the battery is replaced, but is retained. This value is saved through power cycles. Language English German Spanish Italian Portuguese French Russian Simplified Chinese Traditional Chinese Japanese Demo Mode Choice of On or Off
Service Menu 28Chapter 4 - Power-up Default Settings and the Service Menu Error Log This screen displays the eight most recent error code types, logged by the monitor. After eight error code types have been logged, the oldest error code type will be deleted as new error code types are added. Adjacent to each error code will be an entry which is the number of occurrences of that error. This means that if there are many occurrences of one type of error code, that one error code won’t overwrite the other seven error codes. Next to the occurrence field is the time and date of the most recent occurrence of the error code. Error codes may not be changed or reset in this screen. When in the Error Code screen, the Return item is always highlighted; a press of the wheel will return the user to the Service Menu. Rotating the wheel while in the Error Code screen will have no effect. Figure 2 Error Log Refer to “Error Codes” on page 23, for more information on error codes.