TM 1–1520–238–T–31–81–12REMARKS.REMARKSprovide signal path information which is useful in determining possible fault locations duringtroubleshooting.EXAMPLE:REMARKS: From DEK through CPG MRTU Type III to FCC. Selects operating mode forfire control system.1–13PASS.PASSprovides fault isolation and troubleshooting actions to be performed, references to other failure symptomparagraphs within TM 1–1520–238–T–3, references directing you to return to the respective chapter failuresymptom index within TM 1–1520–238–T–3 and to perform the next sequential failure symptom paragraph, andreferences to technical manuals if the required CONDITION is met. Direct read codes are presented when possibleto reduce conversion time. Numbers not identified indicate a failure.EXAMPLE:PASS:If CONDITION corresponds to proper mode for switch selected, go to paragraph17–3.1–14FAIL.FAILprovides location of fault and troubleshooting actions to be performed, references to other failure symptomparagraphs, references to the failure symptom index and next failure symptom paragraph, references to otherchapters and paragraphs, and references to technical manuals if the required CONDITION is not met. Faults arelisted in the most probable failure sequences. ALWAYS troubleshoot wiring to isolate fault first, then replace LRU inthe order given, unless a direct replacement is indicated.EXAMPLE:FAIL: Location of fault: DEK, wiring from DEK to CPG MRTU Type III, CPG MRTU TypeIII. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).1–15MULTIPLEX READ CODES INTERPRETATION PROCEDURE.a.Check entry from log book failure symptom; RANGE DATA CANNOT BE DISPLAYED.b.Go to TM 1–1520–238–T–2 (Integrated Troubleshooting Master Failure Symptom Index) for appropriate MOC.c.Perform MOC.d.Go to TM 1–1520–238–T–3, Chapter 17.e.Go to FAILURE SYMPTOM INDEX in Chapter 17.FAILURE SYMPTOM INDEX SymptomRefer to paragraphDATA ENTRY KEYBOARD NO-GOCPG COMPARTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–1KEYBOARD FAILED DISPLAYED ON ORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–1RANGE DATA CANNOT BE DISPLAYED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–2f.Go to failure symptom paragraph 17–2 referenced in FAILURE SYMPTOM INDEX, as an aid in locating fault.
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