Sinclair SDV 6 Service Manual page 112

8.1.42 P71 - Main control board EEPROM fault
Error display
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
Digital display
The faulty IDU stops. Other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
When the master chip cannot receive data from EEPROM (EEPROM: a non-volatile memory whose
data are kept even when powered off)
Automatic recovery
 The IDU main control board is damaged.
 External interference (such as noise and electromagnetic)
Power off and then
Is the fault cleared?
The main control board
of IDU is normal and
interference (such as
P71
power on the IDU
Yes
subject to external
noise and
electromagnetic)
Display position
Panel, display box, and wired controller
No
Replace the main control
board of the IDU
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