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Troubleshooting AMX
Error Number
TEST 07 FAILED
Error Code / System Message
TEST 07 FAILED - Analog-to-digital converter test failed
Error Question
What does TEST 07 FAILED mean on a GE AMX-Series mobile X-ray?
Short Answer
TEST 07 FAILED: Analog-to-digital converter test failed.
Possible Causes
Read +5 volt power supply. Test fails if result is below +4.5 volts or above +5.5 volts. Error Code 87 Hex is recorded in the Error Log for a failure. Also test +24V and +/- 15 supplies if option switch is set to do so. (+24V and +/- 15V supply test only with firmware 46-302688G1 / 46-302687G1 and later on CPU 46-264974. Test enabled by dip switch #3.) A/D converter reference/power-supply input is outside expected range.
Troubleshooting Steps
Check +5 volt supply. AD574A A/D Converter LF398 sample abd hold, AD5706 16 to 1 MUX, HC374 latch, and all associated circuitry. Check +5 V/reference supply, A/D converter and CPU board circuitry. If display showed "DRIVE WORD LIMIT" then RAM chips is bad, maybe bad U342 and U413.
Parts Areas to Check
CPU board; memory/timer/A-D circuitry identified by the test
For Related Models
AMX-4, AMX-4+, Definium AMX 700
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