Tuttnauer 2540 EHS, Technician Manual

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80
Corrections
1.4
— If the DC voltages at the power supply
connector are incorrect or missing, with the load disconnected, then replace the power supply.
— Replace faulty cables. — Fix damaged connectors — If voltages are missing or incorrect then
replace the ANL-T2 board
Possible cause check-up and tests
—
Check for AC power at the JP2 connector on the AC-T1 board
—
Check for power at the AC input to the power supply
1.4
Check the DC voltages supplied to the system.
—
Connect the Test Point board to the JP7 connector on the ANL-T2 board.
—
Connect the negative probe of a multimeter to TP1 on the test board.
—
With the positive probe check TP2 for +5V DC, an acceptable range is 4.9 – 5.3V
—
With the positive probe check TP3 for +12V DC, an acceptable range is 10.8 – 12.5V
—
If either voltage is incorrect or missing, then remove the output connector from the power supply and recheck at the power supply connector.
—
If the voltages are with in range then reconnect the output connector and proceed
—
Turn off the power and disconnect all connectors except JP8 from the ANL-T2 board. Inspect all cables for loose connectors and all connectors for bent pins.
10. TROUBLESHOOTING (cont.)
10.3 Pre-process malfunction
(cont.)
Symptom
1. (cont.)