TM 1-1520-238-231-326.4Change 81.108A. MAIN ROTOR TRACK AND BALANCE AVA KIT INSTALLATION – continuedACC 1 ACC 3 TACHO 1ACC 2 ACC 4 TACHO 2MULTI-CHTRACKER 128 VDCPOWERONOFFTRACKERMODECADUSTROBEFUSE15 AMPNIGHTDAYTEST121314M04-5208-6(5) Attach UTD cable to DAU receptacle labeled TRACKER 1 (12).NOTEIf signal processing unit is suspected defective, go to subparagraph 1.108A.6.If night tracking is required, go to subparagraph 1.108A.7, otherwise go to to step (6).(6) Ensure that TRACKER MODE switch on front of DAU is in DAY (13) position.e. Inspect (QA).f. Perform main rotor track and balance maintenance operational check(TM 1-1520-238-T).1.108A.6. SPUBypassInstallationInstructionsNOTEThis step provides instructions for bypassing the signal processing unit (SPU). This is done if SPU isdefective.a. Detach connector from lateral accelerometer located above and to the rear of pilots head.b. Attach accelerometer cable (29105600) to the lateral accelerometer.c. Route cable to CPG station and attach to receptacle marked ACC1 (14) on DAU.GO TO NEXT PAGE
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