v “Use this intermittent problem section,” to begin analyzing an intermittent problemv “Correct intermittent problems”v “General intermittent problem checklist” on page 13v “How to analyze the intermittent problem” on page 16v “Intermittent symptoms” on page 16v “Failing area INT-PIPs” on page 17Use this intermittent problem sectionFor use by authorized service providers.The following danger notice always applies in this intermittent section:DANGERTo prevent a possible electrical shock from touching two surfaces with different electrical grounds, use one hand,when possible, to connect or disconnect signal cables. (RSFTD004)Special tools and equipmentYou must make all ac voltage measurements with a meter that measures true root mean square (RMS)voltage. The Fluke** multimeter present in most IBM tool kits measures true RMS voltage. You can alsouse Fluke 8060A, 8600A, or equal meters.You can get equipment for the following conditions from your branch office or installation planningrepresentative:v If you suspect that the air at the system site is too hot or too cold, you need a thermometer to check thetemperature.v If you suspect the moisture content of the air at the system site is too low or too high, use a wet/drybulb to check the humidity. See “General intermittent problem checklist” on page 13 for moreinformation.v If you need to check ac receptacles for correct wiring, you need an ECOS** tester, Model 1023-100, orequivalent tester. The tester lets you quickly check the receptacles. If you cannot find a tester, use ananalog multimeter instead. Do not use a digital multimeter.v To send data with a Licensed Internal Code Trouble Report (LICTR), you need a blank tape for astorage dump. Since you cannot predict when you might need a blank tape, you should always keep ablank tape available.How to use this sectionFollow the steps in this procedure to correct an intermittent problem.1. Read all of the information in “Correct intermittent problems” before you attempt to correct anintermittent problem. Then continue with the next step of this procedure.2. Perform ALL steps in the “General intermittent problem checklist” on page 13. Then return to this stepof this procedure and answer the following question.Did you correct the intermittent problem?v No: Go to “How to analyze the intermittent problem” on page 16.This ends the procedure.v Yes: This ends the procedure.Correct intermittent problemsFor use by authorized service providers.12 iSeries: iSeries Server 270, 800, 810, 820, 825, 830, 840, 870, 890, SB2, and SB3 Hardware Problem Analysis and Isolation
