Inspection Procedure 11

INSPECTION PROCEDURE 11: The Picture And Sound Of External 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.)

Audio And Video Adapter Communication Circuit:

COMMENTS ON TROUBLE SYMPTOM
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.

PROBABLE CAUSES
- 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. Trouble Symptom Chart

STEP 2. Check the audio and video adapter.

Inspect the audio and video adapter. Audio and Video Adapter Inspection

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-10 and audio and video adaptor connector C-126 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are multivision display connector C-10 and audio and video adaptor connector C-126 in good condition?

YES : Go to Step 4.

NO : Repair the connector concerned.

STEP 4. Check the wiring harness between multivision display connector C-10 (terminal 37, 53, 38, 54, 39) and audio and video adaptor connector C-126 (terminal 1, 2, 6, 4, 5).

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

NOTE: Also check intermediate connectors C-106 and C-110 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-106 or C-110 is damaged, repair or replace the connector.

Q: Is the wiring harness between multivision display connector C-10 (terminal 37, 53, 38, 54, 39) and audio and video adaptor connector C-126 (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. Temporarily replace the multivision display, and check the trouble symptom.

Check that the external input is normal.

Q: Is the check result normal?

YES : Replace the multivision display.

NO : Replace the audio and video adapter.