W DOC AIRBUS | TSM A320F

DMU Battery

TASK 31-36-00-810-892-A
DMU Battery

1. Possible Causes
  • DMU [1TV]
  • Battery
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-36-00-710-001
Test of the DMU
AMM 31-36-00-960-002
Replacement of the DMU Batteries
AMM 31-36-34-000-001
Removal of the Data Management Unit (DMU)
AMM 31-36-34-400-001
Installation of the Data Management Unit (DMU)
3. Fault Confirmation
Subtask 31-36-00-740-158-A ** ON A/C NOT FOR ALL
A. Do the DMU (1TV) fault monitoring test AMM 31-36-00-710-001.
   (1) If the Result Power Up Test Page gives these messages, replace the DMU [1TV] AMM 31-36-34-000-001 and AMM 31-36-34-400-001:

  • EPROM I/O FAILURE (CPU1). . . . . . . . I . . .2
  • SRAM FAILURE (CPU1). . . . . . . . . . .I . . .2
  • FLASH PROM FAIL (CPU1). . . . . . . . . I . . .2
  • ACQUI. BUS INTERFACE. . . . . . . . . . I . . .2
  • DIAL. BUS INTERFACE. . . . . . . . . . .I . . .2
  • EEPROM FAILURE (CPU1). . . . . . . . . .I . . .2
  • INVALID OP SOFT. . . . . . . . . . . . .I . . .2
  • CPU1/CPU2 SYNCHRO. . . . . . . . . . . .I . . .2
  • EPROM FAILURE (CPU2). . . . . . . . . . I . . .2
  • SRAM FAILURE (CPU2). . . . . . . . . . .I . . .2
  • FLASH PROM FAIL (CPU2). . . . . . . . . I . . .2
  • SAR MEMORY FAILURE. . . . . . . . . . . I . . .2
  • DAR EMISSION FAILUR. . . . . . . . . . .I . . .2
  • CPU1/CPU2 SYNC. FAILURE. . . . . . . . .I . . .2
  • POWER SUPPLY ALARM. . . . . . . . . . . I . . .2
  • INVALID OP. SOFTWARE. . . . . . . . . . I . . .3
  • INVALID DATABASE. . . . . . . . . . . . I . . .3
4. Fault Isolation
Subtask 31-36-00-810-106-A ** ON A/C NOT FOR ALL
A. If the DMU (1TV) test gives the maintenance message DMU BATTERY (1TV) only:
5. Close-up
Subtask 31-36-00-740-159-A ** ON A/C NOT FOR ALL
A. Do the test given in paragraph 3.A. again to check the correct operation
(no maintenance message display).
[Rev.8 from Aug 2018] 2026.04.04 04:30:05 UTC
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