Siemens MJ-X Troubleshooting Manual page 9

MJ-X Troubleshooting Guide AED-000025-04
Turns on speaker driver with audio tone. (~ 2 seconds)
Battery Level Test
[Set the Remote/Auto/Manual switch to Auto. Press Time Delay.] Displays MJ-X battery voltage.
Local Port (SCI) Loopback Test
[Connect a loopback cable/connector (pins 2 & 3 shorted) to the MJ-X data port. Set the
Remote/Auto/Manual switch to Auto. Press the Alert key.] The MJ-X sends a canned message out the
data port and verifies that the same message is received back.
Reset Status Register
[Set the Remote/Auto/Manual switch to Auto. Press the Voltage Limit Control key.]
The MJ-X reads its MPU reset status register and displays the reset type, abbreviated as: "X" = external,
"P" = power up, "W" = watchdog, "H" = halt, "C" = loss of clock, "S" = system, and "T" = test module.
The reset types that will normally be observed include "X", "P", and "W". Other types may indicate a
problem with the MJ-X. [MJXplorer also reads/displays the Main Processor Reset Status Register.]
Watchdog Test
[Set the Remote/Auto/Manual switch to Auto. Press the Operations Counter key.]
The MJ-X discontinues updating the "watchdog timer", forcing a reset. After resetting, the MJ-X resumes
normal product operations (i.e., the backdoor test mode is exited upon reset.)
Serial EEPROM ("SEEP") Write/Read Test
[Set the Remote/Auto/Manual switch to Auto. Press the Cancel/Reset key.]
The MJ-X performs a non-destructive read/write test of the Serial EEPROM. Several memory locations
are written and then read back. The MJ-X reports Pass/Fail results.
Serial EEPROM ("SEEP") Read Only Test
[Set the Remote/Auto/Manual switch to Auto. Press the Change or Save key. See below.] The MJ-X
reads/displays the values stored at a particular address within the SEEP.
If the Change key is pressed first (to initiate the SEEP read test), the SEEP read address starts at 20 (hex).
If the Save key is pressed first (to initiate the SEEP read test), the SEEP read address starts at 30 (hex).
Subsequently, pressing the Change key increments the SEEP address by 1. Pressing the Save key
increments the SEEP address by 16 (10 hex).
Serial EEPROM ("SEEP") Erase
[Set the Remote/Auto/Manual switch to Auto. Press the Max/Min key. The MJ-X requests confirmation
before proceeding. Be sure you want to do this! Write down the settings for "MP BD VERS" and "PWR
BD VERS" before proceeding!]
The MJ-X re-initializes its configuration data to default values for whatever MP software version is
loaded into the program memory. After erasing, verify all configuration data. Restore the settings for
"MP BD VERS" and "PWR BD VERS".
Real Time Clock (RTC) Tests
Note: For all RTC tests, set the Remote/Auto/Manual switch to Auto. Press key indicated in "[ ]".
Read/Write: [Reactance] Reads/writes the RTC Control register. The MJ-X reports pass or fail.
Clear RTC Power Sense: [Menu] This performs no meaningful function.
Enable RTC Power Sense: [Up Arrow] This performs no meaningful function.
Status Register Read: [Down Arrow] The MJ-X displays the hex value for the RTC Status Register.
Interrupt Register Read: [Left Arrow] The MJ-X displays the hex value for the RTC Interrupt Register.
Control Register Read: [Right Arrow] The MJ-X displays the hex value for the RTC Control Register.
LLC
Siemens T&D 9 version: 5 January 1998