(2)
 Status of the DMC discrete O/P signals in the maintenance mode As long as a DMC runs into the maintenance mode operation, it forces its discrete O/P signals as follows: NORM PFD INVALID : OC PFD IMAGE VALID FOR CAPT : ground DMC INVALID : OC PFD IMAGE VALID FOR F/O : ground VOR/ILS : ground ILS : OC WXR REQUEST : ground ECAM CHANNEL AVAILABLE : ground ECAM DU ALT CONTROL : OC

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 5. A/C Test Plugs for Maintenance
______________________________
 (Ref. Fig. 068)
 The three DMCs low Speed O/P buses are accessible through test plugs in the
 avionics compartment for direct bus signal decoding by means of an
 appropriate portable bus reader, should the CFDIU be unserviceable.

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
 6. List of Error Codes
___________________
 ---------------------------------------------------------------------------|Error| Designation | |Code | | ---------------------------------------------------------------------------|001 | WATCHDOG TEST - TRIGGER WATCHDOG FAULT | |002 | WATCHDOG TEST - WATCHDOG ERROR | | | | |011 | CPU INSTRUCTION TEST - REGISTER FAULT (VDO) | |012 | CPU INSTRUCTION TEST - FLAG FAULT | |013 | CPU INSTRUCTION TEST - ADDITION FAULT | |014 | CPU INSTRUCTION TEST - ARITHMETIC FAULT | |015 | CPU INSTRUCTION TEST - BCD FAULT | |016 | CPU INSTRUCTION TEST - ADDRESSING FAULT | |017 | CPU INSTRUCTION TEST - SHIFT & ROTATE FAULT | |018 | CPU INSTRUCTION TEST - BIT MANIPULATION FAULT | |019 | CPU INSTRUCTION TEST - MULTIPLE MOVE FAULT | |01A | CPU INSTRUCTION TEST - DATA MOVE FAULT | |01B | CPU INSTRUCTION TEST - ZERO DIVIDE FAULT | |01C | CPU INSTRUCTION TEST - TRAP 10 FAULT | |01D | CPU INSTRUCTION TEST - REGISTER FAULT (OPER) | | | | |021 | RAM TEST - RAM ERROR | |022 | RAM TEST - R/W BYTE ERROR | |023 | RAM TEST - BOARD THAT CANNOT GAIN ACCESS TO THE TEST REPORT ZONE | | | IN THE COMMON MEMORY | |024 | RAM TEST - WRONG PATTERN IN COMMON MEMORY | |025 | RAM TEST - IMPOSSIBLE ACCESS TO SIGNATURE IN COMMON MEMORY | |026 | RAM TEST - ERRONEOUS CONTROL WORD IN COMMON MEMORY | |027 | RAM TEST - ERROR IN RAM ZONE OF LXXLPPAR TABLE | |028 | RAM TEST - BAD CYCLIC RAM TEST | |029 | RAM TEST - BAD RAM PIN PROGRAM | | | | |031 | PROGRAM CHECKSUM - MSB CHECKSUM ERROR | |032 | PROGRAM CHECKSUM - LSB CHECKSUM ERROR | |033 | PROGRAM CHECKSUM - BAD TELELOADING PROGRAM CHECKSUM | |034 | PROGRAM CHECKSUM - BAD CHECKSUM IN DMC OPERATIONAL DPUS |
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R  Test Plug Location Figure 068
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 ---------------------------------------------------------------------------
|Error| Designation | |Code | | ---------------------------------------------------------------------------| | | |041 | COMMON RAM PROTECTION TEST - 'NO READ PROTECTION' FAULT | |042 | COMMON RAM PROTECTION TEST - 'NO WRITE PROTECTION' FAULT | |043 | COMMON RAM PROTECTION TEST - 'READ PROTECTION' FAULT | |044 | COMMON RAM PROTECTION TEST - 'WRITE PROTECTION' FAULT | |045 | COMMON RAM PROTECTION TEST - MODE FAULT | | | | |051 | REAL TIME COUNTER - I/O REAL TIME COUNTER A FAULT | |052 | REAL TIME COUNTER - I/O REAL TIME COUNTER B FAULT | |053 | REAL TIME COUNTER - DPU REAL TIME COUNTER A FAULT | |054 | REAL TIME COUNTER - DPU REAL TIME COUNTER B FAULT | | | | |061 | TIMER D - I/O RS232 BAUDRATE FAULT | |062 | TIMER D - DPU MFP2 TIMER D FAULT | | | | |071 | RS323/RS422 CLOCK (TIMER C) - I/O RS422 BAUDRATE CLOCK FAULT | |072 | RS323/RS422 CLOCK (TIMER C) - DPU RS232 BAUDRATE CLOCK FAULT | | | | |081 | DISCRETE - DISCRETE HIGH FAULT | |082 | DISCRETE - DISCRETE LOW FAULT | |083 | DISCRETE - DISCRETE OUTPUT LOW FAULT | |084 | DISCRETE - DISCRETE OUTPUT HIGH FAULT | | | | |091 | REAL TIME MONITORING/FRAME TIME COUNTER - FRAME TIME COUNTER FAULT| |092 | REAL TIME MONITORING/FRAME TIME COUNTER - FRAME TIME PENDING FAULT| |093 | REAL TIME MONITORING/FRAME TIME COUNTER - FRAME TIME INTER. MASK | | | FAULT | |094 | REAL TIME MONITORING/FRAME TIME COUNTER - FRAME TIME PEND. RESET | | | FAULT | |095 | REAL TIME MONITORING/FRAME TIME COUNTER - FRAME TIME INTERRUPT | | | FAULT | |096 | REAL TIME MONITORING/FRAME TIME COUNTER - REAL TIME MON. TIMER | | | FAULT | |097 | REAL TIME MONITORING/FRAME TIME COUNTER - REAL TIME MON. PENDING | | | FAULT | |098 | REAL TIME MONITORING/FRAME TIME COUNTER - REAL TIME MON. MASK | | | FAULT | |099 | REAL TIME MONITORING/FRAME TIME COUNTER - REAL TIME MON. PEND. | | | RESET FAULT | |09A | REAL TIME MONITORING/FRAME TIME COUNTER - REAL TIME MON. INTERRUPT| | | FAULT | |101 | HARRIS 3282 SELFTEST HIGH SPEED - ARINC OUTPUT ENABLE FAULT | |102 | HARRIS 3282 SELFTEST HIGH SPEED - TRANSMITTER 1-9 EMPTY FAULT |

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