SECTION VI TROUBLESHOOTING
2005 Tech 2 User’s Guide VI - 2
Power On Self Test (POST)
Power On Self Tests run automatically each time the power [PWR] button on the Tech 2 keypad is pressed
on. The screen displays pass or fail results for each area tested. POST automatically checks the following:
• MC68332 processor
• External RAM (Random Access Memory)
• Flash memory
• Display controller and display
• Sound transducer
• MC68332 RAM
• Real-time clock
• Keypad controller and keypad
• Main UART (Universal Asynchronous Receiver/Transmitter)
Results of POST may include fatal errors that do not allow you to continue, or non-fatal errors that allow
you to continue without full Tech 2 operation. If normal Tech 2 functions are stopped or limited, contact
Customer Support to determine if service is required.
At completion of POST, the following audible signals indicate a pass or fail condition:
• One beep - No problem. Your Tech 2 is operating normally.
• No beep - Sound transducer has failed. Contact Customer Support.
• Three short beeps - Tech 2 has failed POST. Contact Customer Support.
In the United States and Canada to contact Customer Support, dial:
• English: 1-800-828-6860 (option 1)
• French: 1-800-503-3222
• Spanish: 1-248-265-0840 (option 2)
• Fax line: 1-248-265-9327
Refer to page iii for international customer support.
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