Whenever the multivision
display is replaced, ensure that the power supply circuit and the earthing circuit are normal.
(Check that the voltage is 10 V or more.)
COMMENTS ON TROUBLE SYMPTOM
If no map data or audio file in a SD card can be read, the SD card or
the multivision display may be defective.
PROBABLE CAUSES
Defective SD card
Malfunctions of multivision display
DIAGNOSIS PROCEDURE
STEP 1. Check if the error message is displayed on the monitor.
(Refer to .)
Q.
Is the error message displayed on the monitor?
YES : Refer to error message (refer to ), take necessary
steps. If the SD card still cannot be read, go to Step 2.
Go to Step 2.
STEP 2. Check the service data log for the MMCS service mode.
(1)Display the service data log for the MMCS service mode. (Refer to .)
(2)Check if the service data log for SD is displayed.
Q.
Is the service data log displayed?
Abnormalities relating to high or low temperature may be present. Check if the
multivision display can output the sound at the operable temperature. If the SD card still cannot
be read, go to Step 3.
Go to Step 3.
STEP 3. Perform "SD Card Check" in the MMCS service mode.
(1)Display "SD Card Check" in the MMCS service mode. (Refer to .)
(2)Check if "Map Slot Check Results OK" is displayed.
(3)Check if "USER Slot Check Results OK" is displayed.
Q.
Is the check result normal?
Go to Step 4.
Replace the SD card with a known good one. Then recheck whether the trouble is
reproduced. If the trouble is still reproduced, go to Step 4.
STEP 4. Temporarily replace the multivision display, and check the
trouble symptom.
.)
: Refer to error message (refer to 
Go to Step 2.
Abnormalities relating to high or low temperature may be present. Check if the
multivision display can output the sound at the operable temperature. If the SD card still cannot
be read, go to Step 3.