TM  11-6625-3081-23 7-13.   FILTER   WHEEL/MOTOR   ASSEMBLY   (VARIABLE   FILTER)   2A1A2A10 7 - 13 INPUT    CODE: DCVARF   (cont) c . SEGMENT 1 1.   VDT   DISPLAY PERFORM THE FOLLOWING REPLACE ACTION IN THE ORDER LISTED. (REFERENCE TM  11-6625-3081-23  FOR  REPLACEMENT  PROCEDURES.) REF.  DES. PART NO. NAME 1. 2A2A6XX HP69331B DIGITAL  OUTPUT  CCA  (SLOT  407) 2.  2A2A6XX 13083412 DIGITAL INPUT CCA (SLOT 401) 3. 2A2A7A6A1 13082741 STEPPER MOTOR CCA No. 1 4.  2A2A7A6A2 13082735 STEPPER MOTOR CCA No. 2 5. 2A2A7A6A3 13082732 STEPPER MOTOR CCA No. 3 6. 2A1A2A1OA2W53 13082263-49 CABLE ASSY. W53 (OPTICAL SENSOR) 7. 2A1 13082800-59 DAYSIDE TEST BENCH 2.   CORRECTIVE   ACTION   -   SEGMENT   1 (a) Remove Digital Output 2A2A6XX. Check  contacts  of  mating  connectors  and repair if required. Install  replacement  2A2A6XX  and  perform  DCVARF test. If DCVARF test passes,   no further action required. If this segment displayed again, proceed to (b). If another segment displayed, proceed  to  that  segment  and  continue  troubleshooting. (b) Remove Digital Input 2A2A6XX. Check  contacts  of  mating  connectors  and repair if required. Install  replacement  2A2A6XX  and  perform  DCVARF test. If DCVARF test passes,   no further action required. If this segment displayed again, proceed to (c). If another segment displayed, proceed  to  that  segment  and  continue  troubleshooting. (c) Remove Stepper Motor CCA No. 1 2A2A7A6A1. Check contacts of mating connectors  and  repair  if  required. Install  replacement  2A2A7A6A1  and perform DCVARF test. If DCVARF test passes, no further action required. If this segment displayed again, proceed to (d). If another segment  displayed,  proceed  to  that  segment  and  continue troubleshooting. (d) Remove Stepper Motor CCA No. 2 2A2A7A6A2. Check contacts of mating connectors  and  repair  if  required. Install  replacement  2A2A7A6A2  and perform DCVARF test. If DCVARF test passes, no further action required. If this segment displayed again, proceed to (e). If another segment  displayed,  proceed  to  that  segment  and  continue troubleshooting. 7-59