DTS DTS-6D manual WON’T Boot / Load, Audio Problems Missing channels

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DTS-6

DTS-6/D TROUBLESHOOTING

7.WON’T BOOT / LOAD

Verify drive assignments and that each drive is spinning.

Verify that the ROM-DOSchip is programmed with the latest version firmware. NOTE: On DTS players with FUTURE DOMAIN SCSI board, the ROM-DOSRevE is located at U12 on the DTS D422 board. If the DTS player uses ADAPTEC SCSI board, U12 is not used. Instead, AQRM chip is installed in the ACQUTEK board (and not used on D422).

Check the Acqutek “AQRM” chip. If its called “ROMDOSB”, replace and recheck it.

• If the small red LED is lit on the ROM card, this indicates a watchdog error. Replace the card.

8. AUDIO PROBLEMS Missing channels

Verify the DTS-6 channel outputs at JM21. Use a DTS RevC disc to test.

Look for signal coming into the D426 (transformer) board.

Verify the signal passes through the board when relays are energized. The relays are when player switches into DIGITAL). Possible bad relay, transformer, or cable connection.

If all the channels are missing but the audio is present on the boards, the problem could also be that the D426 (transformer) board relays are not energized. They are powered from the D421 board. A relay “click” should be heard when the unit switches into DIGITAL.

The channel outputs are derived from the following:

Left and Left Surround from the D420 board.

Center, Right, Right Surround from the D421 board

Subwoofer from the D421 (to D426 transformer board) and D420 (switched output to 15-pin connector).

If a single channel is missing, find the board with the present on the board but not on the output of the unit, D426 transformer board.

missing channel and replace it. If the audio is check the cable running from the D421 to the

DTS-6D

There are only a few items that can be checked for audio failure on the D536 board.

Check the ribbon cable from the D536 to the filter board D562. Check both ends.

Check that all IC chips are pushed down in their sockets.

Check U20 at pins 1 (-15VDC), 2 (ground), and 3 (+15VDC). Replace U20 if bad.

Check U23 for an output of +12VDC and U22 for an output of -12VDC

If there are other failures, replace D536 board.

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Contents DTS-6 /-6D System Testing Troubleshooting Digital Theater SYSTEMS, INCTable of Contents Test Procedure Tools RequiredSPL DTS System Test DTS Subwoofer in the Surrounds?Left Type Left & Right Surround Non-sync Center Mono DTS 70mm Fail-safe Test OffsetDTS Test Discs DTS Trailer DiscsPower handling test DTS Empirical Test DiscDTS System Troubleshooting System Troubleshooting Hear thumping noise when DTS print playing in optical Channels don’t sound balancedChannels are mixed Sound not in sync with pictureHave no DTS discs Sound wows. Explosion sounds are heardApparent in optical as well? Not a DTS player problem Noise, distortion, and other sound anomaliesChannel output too low/high and won’t adjust When the DTS defaults, no soundNo DTS sound, but optical sound is OK DTS-6 Volume too loud / softSubwoofer in the surrounds DTS-6DPlayer DTSTimecode Sync Problems DTS-6 /-6D Unit TroubleshootingDrive Problems Ejecting DiscsWON’T Boot / Load Audio Problems Missing channelsReplacing CD-ROM Drives Toshiba / Future Domain Scsi and the ROM-DOSchipTeac / Acqutek & Adaptec Scsi and the Aqrmr chip Replacing CD-ROM Drives 16X Teac Page Page Page Page Blinking Timecode Reader LED Bad/Poor TimecodeFilm Instability/Speed Electrical noise/grounding problems DTS equipment problemFilm Instability Page DTS-6 2-drives 35mm / 70mm System Parts List Setup EquipmentDTS-6D 3-drives 35mm / 70mm System Parts List 2503-0014-00Replacement Parts List HOW to Contact DTS