Inspection Procedure 11

Inspection Procedure 11: The picture and sound of audio and video adapter's input are not played.

CAUTION:
Whenever the multivision display is replaced, ensure that the power supply circuit and the grounding circuit are normal. (Check that the voltage is 10 V or more.)










TECHNICAL DESCRIPTION (COMMENT)

The wiring harness between audio and video adapter and multivision display, audio and video adapter, or multivision display may have a problem.
NOTE:
Problem of the device to be connected and the connection problem between the audio and video adapter and the device is suspected. Thus, check the operation condition and connecting method of the devices to be connected to the multivision display and audio and video adapter before diagnosis.

TROUBLESHOOTING HINTS

- The multivision display may be defective

- The audio and video adaptor may be defective

- Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set

- MB992006: Extra Fine Probe

STEP 1. Check of DVD picture

Check that the DVD picture is displayed normally.

Q. Is the check result normal?

YES Go to Step 2.
NO Perform the troubleshooting related to the MMCS (Refer to Symptom Chart).
STEP 2. Check the audio and video adapter.

Inspect the audio and video adapter.(Refer to Audio and Video Adapter)

Q. Is the check result normal?

YES Go to Step 3.
NO Replace the audio and video adapter.
STEP 3. Check multivision display connector C-12 and audio and video adaptor connector C-121 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Are multivision display connector C-12 and audio and video adaptor connector C-121 in good condition?

YES Go to Step 4.
NO Repair the connector concerned.
STEP 4. Check the wiring harness between multivision display connector C-12 (terminal 47, 63, 48, 64, 49) and audio and video adaptor connector C-121 (terminal 1, 2, 6, 4, 5).

- Check the communication lines for open circuit and short circuit.

NOTE:
Also check intermediate connectors C-103 and C-107 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-103 or C-107 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between multivision display connector C-12 (terminal 47, 63, 48, 64, 49) and audio and video adaptor connector C-121 (terminal 1, 2, 6, 4, 5) in good condition?

YES Go to Step 5.
NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
STEP 5. Retest the system

Check that the external input is normal.

Q. Is the check result normal?

YES The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Replace the audio and video adaptor.