TROUBLESHOOTINGDIAGNOSTIC POWER UP TESTSI-E96-192-5A 4 - 3DC Power TestFollow these steps to test the DC power supply. The necessarytest equipment consists of a digital voltmeter. Figures 6-5, 6-6,6-7 and 6-8 show the main power supply.1. Turn off power to the console.NOTE: Do not disconnect the power wiring from the multibus cardcage (IIOIC422 models).2. Unplug DC power distribution cables from all peripheraldevices (ADP panel and keyboard interface board, if present).Disconnect the power cables at the distribution side of thecables.3. Make certain the power line cord for the power supply isplugged into the power entry panel (keyboard interface assem-bly for the IIOIC421 tabletop).4. Insure that all power supply wiring is correct. Refer toSection 3 and Section 6.5. Apply power to the console.6. Measure the DC voltages at the multibus card modulebackplane for the IIOCI422 models and at connector P16 of theIIMKM02A module for all other OIC models.7. Take the voltage measurements with the power supplyunder load. Measure the +5.00 VDC; the voltage should be+0.25 VDC and -0.0 VDC of the value. Measure the+12.00 VDC and -12.00 VDC; the voltage should be +1.5 VDCand -1.00 VDC of the value.NOTE: Unstable operation may result if the power supply voltagesare not in tolerance.8. Turn off the power to the console.9. Connect all DC power distribution cables removed in Step 2.10. Apply power to the console and check the DC voltage levelsagain. Adjust the power supply to obtain the voltage within atolerance of +0.05 V.
