DTS DTS-6D, DTS-6 User Manual

DIGITAL THEATER SYSTEMS, INC.

Digital Sound For Movies

DTS-6 /-6D System Testing

And

Troubleshooting

August 1999 Digital Theater Systems, Inc.

5171 Clareton Drive

DTS SA, UK Agoura Hills, CA 91301 USA

Telephone: [phone] Telephone [phone]
Fax: [phone] Fax [phone]

Email [e-mail]

TABLE OF CONTENTS

Page

DTS System Test ………………………………………………………………..… 3 – 5
70mm Failsafe Test ……………………………………………………………….. 6
DTS Test Discs (history) ………………………………………………………….. 7
Empirical Test Disc (menu) ………………………………………………………..8
DTS System Troubleshooting Guide ………………………………………………9 – 16
DTS-6/6D Player Troubleshooting Guide …………………………………………17 – 18
Replacing TEAC CD-ROM Drives …………………………………………………...19 – 25

TEAC Jumper (address) Drawing ……………………………………………………………….21

DTS-6 (2-drive) Top View Drawing ……………………………………………………………22
DTS-6D (3-drive) Top View Drawing …………………………………………………………23
U14 (

TCR) & AQRM Drawing …………………………………………………………………. 24

SCSI & ROM Board Drawing …………………………………………………………………….25

Blinking Timecode Reader LED (Troubleshooting Guide) ………………………. 26 – 28

Timecode Signal Drawing ………………………………………………………………………28

DTS-6 35mm / 70mm System Parts List ……………………………………….. 29
DTS-6D 35mm / 70mm System Parts List ……………………………………… 30
Replacement Parts List (DTS-6/ -6D) ………………………………………………. 31
How To Contact DTS …………………………………………………………… 32

Main Office

Digital Theater Systems

5171 Clareton Drive

*

Agoura Hills, CA 91301 USA

*

Telephone [phone]

Thank you for choosing DTS !

2

Fax [phone]

*

DTS-6/6D System Test

Tools Required

** RTA (real time analyzer) and pink noise card. Necessary to adjust EQ in “B” chain.
** SPL meter
Projector Speed Disc (special order from DTS)
DTS Technician’s Kit:

•••• 6-Track SETUP Disc, Rev. DS1

Used to adjust DTS-6D levels, check automatic default switching, and verify operation of drives & player.

•••• “Buzz and Bill Show” Disc (dated Feb. 1, 1999) •••• DTS Demo Film, 35mm

Used with the DTS Demo Film to test the DTS system. Used with t he “Buzz and Bill Show” disc .

•••• DTS Empirical Test Disc (dated June 7, 1997)

Used to test the theater’s sound system

NOTE
** These items are not supplied by nor are available from DTS.

All tests should be preformed with no audience in the theater.

Test Procedure

1. Before testing the DTS system, check and adjust the theater cinema processor’s B-chain. This must

be checked first. All level adjustments should be made with master fader set to “7”.

Remember, any changes to the B-chain will effect the DTS system.

2. Be sure the rear panel AC voltage switch is properly set for your main AC supply rating. Power on
the DTS player and remove any discs.

3. Sync. Thread up the DTS demo film and use its special leader to calculate the offset. Verify this
matches the OFFSET setting (delay) on the DTS player.

4. Insert the Setup Disc into the DTS player. You may use either the RevC or DS1 Setup Disc. The
player should easily accept the DTS disc. Once the DTS player boots up, it should automatically
switch the cinema processor to the correct format and tone/pink noise should be heard in the theater.

5. Set DTS levels. Open the screen curtains and ensure master fader is set to “7”. Take SPL meter into
the theater and stand off-center in the rear third of the theater. SPL readings should be measured
unweighted, or C weighted - slow. Verify all output levels are as noted below. Do NOT point the

sound pressure level meter out of the porthole window, this will not give you correct SPL readings.

SPL

• Left channel PINK noise 85dB

• Left surround

PINK noise high passed at 80Hz 82dB

• Center channel PINK noise 85dB

• Right surround

• Right channel

PINK noise high passed at 80Hz 82dB

PINK noise 85dB

• Sub bass channel PINK noise low passed w\DTS filter 91dB

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DTS SYSTEM TEST

6. Index Switch. A small black momentary push button switch located below the TIMECODE HEAD

OFFSET

switches (behind the plate and under the LEDs). It is commonly called the “index switch”.

This button can be used to increment to the nex t track being played. This feature works on the DTS

6-TRACK SET UP

discs RevC and Rev.DS1 only. On shows of serial number 1009 and higher, the

momentary button also bypasses the DTS processor to allow checking of the optical bypass function.
NOTE: All DTS-6D units have this switch, but all DTS-6 units under serial number 1000 do not.

The index switch can be added by installing DTS kit D475.

7. Mono Surround. For those theaters with mono surround only, wait for either the left -or- the right
surround PINK noise when adjusting the MONO SURR trimpot for 82dB SPL.

8. Subwoofer. The DTS subwoofer output level ranges from 20Hz to 80Hz.. Observation of your
subwoofer’s specifications must be taken to avoid damage to the speaker. If a subwoofer is
driven below its cutoff frequency, its driver may become unloaded. When unloaded, the voice coil
can travel outside of the magnet’s gap, thus overheating or causing mechanical damage to the
speaker. A high pass filter should be installed on those speakers with high cutoff frequencies.
Contact the speaker’s manufacturer for details.

DTS Subwoofer in the Surrounds?

The DTS subwoofer signal is derived by filtering out the surround signals from 80Hz and below.
That signal is put on its own “subwoofer” output on the DTS player. You may verify this while
tuning (EQ-ing) a theater. Insert the DTS Setup disc into the player and play the subwoofer pink
noise off the disc. Turn off the subwoofer speaker and look at the pattern on the RTA (real time

analyzer)

. On a DTS-6D, you’ll see a dramatic roll-off at 80Hz (on a DTS-6, its less of a roll-off). It is
normal to hear DTS subwoofer, above 80Hz, in the surrounds. For that reason, you may choose to
turn off the surrounds when adjusting the DTS subwoofer SPL.

9. Remove the Setup Disc and insert the “Buzz and Bill Show” Disc. Once threaded and the DTS
“SYSTEM” light flashes, start running the DTS demo film.

10. Verify the DTS system automatically switches the cinema processor to the correct sound format
and the DTS digital sound track is playing:

* The DIGITAL, CD-ROM, and TIMECODE lights on the player should be on steady

SYSTEM light on the player should be flashing

* The
* The
* The green light on the reader should be glowing steadily and not flashing

CD-ROM drive light (that is playing the disc) should be flashing sporadically

11. Verify the digital sound track is playing by turning off the (sound) exciter lamp. The sound track
should still be heard. Once verified, turn the exciter lamp back on.

12. Fail-safe. Block the timecode and verify the cinema processor automatically switches to a stereo
optical (sound) format. There should not be a significant level difference between optical and digital
sound (in a quite scene). If there is, recheck the “B” chain and the DTS player level settings.

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DTS SYSTEM TEST

13. Unblock the timecode. Once the cinema processor automatically returns to a digital format, go into
the theater and listen to the sound track. Verify good sound quality and lip sync. Also verify no
extraneous noise during the quiet scenes.

14. DTS-6D Programmed Default. Use the
player. Load the SET-UP DS1 disc in the DTS-6D and stand next to the unit when performing this test.
To start, allow the right channel’s pink noise to play in the theater. Eject the disc by pushing the
open/close button on the drive. The cinema processor should automatically pulse to the 04 (A-type)
format. Repeat procedure for the remaining formats as listed:

Pink noise channel Default Format

Left A-type (04)
Left

& Right Surround Non-sync

Center SR (05)
Right Mono (01)

DTS-6 Programmed Default. Use either the RevC or DS1 Setup disc to set levels. To check
default, eject the disc and verify the cinema processor automatically pulses to an optical sound
format. The DTS-6 system can default to either “A” type (04) or “SR” (05). This is determined by
jumper settings on external DTS logic boards.

SET-UP DS1 disc to test all the default functions on the

D422 board, INDEX SWITCH, (push-button) behind the front panel plate

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DTS 70mm Fail-safe Test

NOTE: If using one DTS-6D unit, there is no fail-safe or fall-back available on this type of system. If

using two DTS-6D units, verify connections to the fail-safe board. See installation manual.

There are no magnetic sound tracks on DTS 70mm prints.

Tools Required

DTS 70mm offset measurement film
DTS 70mm formatted film and two sets of discs that match the film.
DTS Setup Disc, DS1

Test Procedure

1. Use the DS1 Setup Disc to verify that both players have the same SPL output. Adjust level pots, if
necessary.

2. Offset.

• If this is already setup for DTS 35mm, be sure to write down that offset setting before proceeding.

• Two DTS players and one 70mm reader: Use the DTS 70mm offset measurement film to

calculate the delay. Verify both players have their OFFSET switches adjusted to this number.

• Two DTS players and two 70mm readers: First verify which reader goes with which player. The

easiest way to do that is to power on each player one at a time and see which reader powers. Label
each player and reader pair.

• Use the DTS 70mm offset measurement film to calculate the delay on the first reader. Set the

matching player OFFSET switches to this number.

• Measure the second reader and set the second player.

• Label the player to the OFFSET setting for 70mm and 35mm. Best place to put that is behind the

front plate.

3. Thread the DTS 70mm test film through the projector and reader(s).

4 Load the matching CD-ROM discs into the DTS players: One disc in the “main” unit and the second

disc in the “backup” unit.

5. Start the projector. The cinema processor should automatically switch to a digital sound format and
both players should be playing in digital -- their
lights should be on solid. Turn up the booth monitor so that sound is heard.

6. Failsafe check. While playing in DTS, eject the disc(s) from the main player. The backup player
should immediately take over. No interruption or change in sound should be heard.

7. Load the disc(s) back into the main player. Once it starts playing in digital it will take over the
backup unit. No interruption or change in sound should be heard once the main unit plays in digital.

8. Get another person to assist you and repeat steps 5 & 6 while you are listening in the theater.

9. If the two players do not sound the same, go through the setup procedure for each unit and repeat
70mm fail-safe test again.

10. If using two projectors, repeat the test for the second projector.

SYSTEM lights should be blinking and their DIGITAL

‘

6

DTS TEST DISCS

Below is a list of all the test discs released by DTS. Some of these test discs are obsolete and should no
longer be used. In most cases, the discs are obsolete due to software changes that made them incompatible
with current DTS players. Normally, when a test disc is obsolete, DTS will send free upgraded discs to
people who have purchased DTS Technician’s Kits. Sometimes, we miss a few people. Anyone who was
missed is still entitled to a free upgraded disc. They should contact DTS Customer Service [phone]).

CURRENT OBSOLETE TITLE NOTES

• Stereo Setup Stereo DTS players obsolete. Do not use.

• Stereo Demo Stereo DTS players obsolete. Do not use.

• 6-Track Setup, RevC May be used to set SPL levels, will not work

in DTS-6D Drive C. Do not use.

• 6-Track Setup, RevD Has a bug. Do not use.

• 6-Track Setup, DS1 Used to checks DTS-6D defaults.

• 6-Track Demo, D-1 Original demo disc, old software. Do not

use.

• Buzz and Bill Show 6-track demo remix, no da te, ha s a b ug Do

not use.

• Buzz and Bill Show June 27, 1997, do not use.

• Buzz and Bill Show February 1, 1999. Has SMPTE RP200.

• Empirical Test No date. Will not work in DTS units with

Adaptec/Acqutek SCSI. Do not use.

• Empirical Test June 7, 1997

• Projector Speed Test Special order only.

• Strobe Test June 17, 1997, normally not distributed. Has

a software bug. Do not use.

• * Stand Alone Trailer Disc Has old software that may cause current

players to malfunction. Do not use.

* DTS Trailer Discs

Use only most current trailer discs. Any disc specially made for a particular cinema chain, must contain the
current software file.

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DTS EMPIRICAL TEST DISC

Tests #1 thro ugh #35 will play automatically. For a specific test, wait for the announcement, then select the desired test number on
the

TIMECODE HEAD OFFSET rotary switches (located behind the player's front panel access cover). Be sure to write down the

current offset se tting before your selection is made and restore the setting for proper DTS movie playback. NOTE: *Some of

these test signals may cause serious damage to sound systems that are not properly designed to reproduce the extended
dynamic range of a digitally-based sound storage system.

1 Empirical test section announcement

*2 Power handling test

3 Left level, set channel ID, pink noise @ 0dB alternating with low level multi-tone
4 Left surround level set
5 Center level set
6 Right surround level set
7 Right level set
8 Male voice for speaker comparison
9 Female voice for speaker comparison
10 Music for speaker comparison
11 Dialog, front speaker balance
12 Pink noise, surround speaker balance
13 Music, front speaker balance
14 Digital silence
15 Left channel ID, -10dB sweep, 0dB sweep
16 Left surround channel ID, -10dB sweep, 0dB sweep
17 Center channel ID, -10dB sweep, 0dB sweep
18 Right surround channel ID, -10dB sweep, 0dB sweep
19 Right channel ID, -10dB sweep, 0dB sweep
20 Room acoustics test: left surround, right surround, center
21 Left level sweep 400 Hz, -5dB to +5dB
22 Left surround sweep 400 Hz, -5dB to +5dB
23 Center level sweep 400 Hz, -5dB to +5dB
24 Right surround sweep 400 Hz, -5dB to +5dB
*25 Right level sweep 400 Hz, -10dB to +20dB
26 Left level sweep 400 Hz, -10dB to +10dB
27 Left surround level sweep 400 Hz, -10dB to +10dB
*28 Center level sweep 400 Hz, -10dB to +20dB
29 Right surround level sweep 400 Hz, -10dB to +10dB
*30 Right level sweep 400 Hz, -10dB to +20dB

*31 Left explosion @ +10dB, +20dB
*32 Left surround explosion @ +10dB, +20dB
*33 Center explosion @ +10dB, +20dB
*34 Right surround @ +10dB, +20dB
*35 Right explosion @ +10dB, +20dB Must dial in remaining programs listed below

36 1KHz @ reference level, all channels (250mV RMS)
37 Left pink noise @ reference level (85dB SPL)
38 Left surround pink noise @ reference level (82 dB SPL)
39 Center pink noise @ reference level (85dB SPL)
40 Right surround pink noise @ reference level (82dB SPL)
41 Right pink noise @ reference level (85dB SPL)
42 Sub bass pink noise @ reference level (85dB SPL)
43 Left 1/3 octave pink sweep 25 Hz - 2 KHz, 1 second pause, sweep 2 KHz - 20 KHz
44 Left surround 1/3 octave pink sweep 125 Hz - 2 KHz, 1 second pause, sweep 2 KHz - 20 KHz
45 Center 1/3 octave pink sweep 25 Hz - 2 KHz, 1 second pause, sweep 2 KHz - 20 KHz
46 Right surround 1/3 octave pink sweep 125 Hz - 2 KHz, 1 second pause, sweep 2 KHz - 20 KHz
47 Right 1/3 octave pink sweep 25 Hz - 2 KHz, 1 second pause, sweep 2 KHz - 20 KHz
48 Sub Bass sweep 20 Hz - 80 Hz
49 5 channel pop test, channel number ID by number of pops
50 4 seconds pink noise: left, cent er, right, left surround, right surround

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DTS SYSTEM TROUBLESHOOTING

1. Movie not playing in DTS digital sound, CP (cinema processor) won’t switch to DTS format.

Is the SYSTEM light blinking on the DTS player?

NO System is not ready to play. Ensure movie disc(s) are in the DTS player. They should match the movie

playing. Turn off DTS player power switch, wait 3 seconds, switch back on. If
repeat test using another set of movie discs or use a DTS test disc.

SYSTEM light doesn’t blink,

• If the SYSTEM light doesn’t blink, try the DTS Setup Disc. If that won’t work, check the power.
*Verify the rear panel power switch is correctly set. Are the AUTOMATION and ANALOG cables swapped?
*Is the power supply’s fan turning? If not rotating, turn off power switch and remove player’s top cover.

• Verify the spade lugs on the power switch are securely attached.

• Use a multimeter to verify the power switch is switching correctly. Can be checked at AUX AC socket in rear panel.

• If the power switch is correctly wired and the switch tests OK, check power on the motherboard.

• On the motherboard, if the voltage from the power supply is not correct, replace the supply.
*If the voltage input to the motherboard is good, turn off power and push down all the internal boards onto

their connectors. Be sure all cables are securely connected and their
again by inserting any DTS disc into player. If the

SYSTEM light starts to blink, reinstall.

PIN 1 is correctly oriented. Try test

*If the power supply is good but the player won’t boot up, replace player.

YES

*Is the player’s TIMECODE light on solid?

• If not o n, is the film threaded thro ugh t he DTS reader? Is DTS timecode on the print?

• Is the reader’s red LED (inside the lens) on?

• If not on, the reader isn’t getting 5v DC from the player. Verify the cable connection from player to reader.
Check cable’s pin-to-pin continuity. Check for shorts or opens in cable. Check that the fuses inside the DTS
player are not blown (

NOTE: DTS-6D use self resetting circuit breakers).

• Is the reader’s green LED on?

• If not on, attach the grounding jumper on the reader’s timecode cable to the projector. Easiest place to do that is

attach to the screw that secures the timecode cable to the reader head. The reader’s housing must be electrically
connected to the projector housing. Verify with an ohm meter. This is needed for projectors that are not
properly grounded.

• If grounding the projector doesn’t help, replace reader.

• If the TIMECODE light is blinking, see number 2, next page, follow steps in “Is reader’s green LED blinking?”

• If the reader’s green LED is very dim, replace the reader.

*Is the DTS player’s DIGITAL light on?

• If not on, verify only theatrical discs are in the player. Use only one movie title and trailer disc at a time.

• If not on, verify the movie discs match the movie playing. Turn DTS player power off, wait 3 seconds, and power

on the DTS player. This must be done when changing movie/trailer discs.

• If not on, is a Dolby SR-D (DA10 or DA20) connected to the CP as well as DTS?

• If yes, turn the DA10/20 off, it interferes with the format switching.

• If not on, test the speed of the projector by using the DTS Projector Speed Test Disc. Follow directions included

with disc.

(#1 continued next page)

9

SYSTEM TROUBLESHOOTING

1. (continued). Movie not playing in DTS digital sound, CP (cinema processor) won’t switch to DTS format.

*Is CP in the correct sound format? In most cases, DTS will automatically pulse the CP.

• If re-starting after film break, some automation systems may switch the CP out of the digital format. If

this occurs, it will be necessary to reselect the digital format manually.

• Is the BS22 cable (DTS-6) or automation cable (DTS-6D) connected to CP logic? Verify PIN 1.

• Use DTS Setup Disc to verify the DTS player automatically switches into digital. Some CP models will be pulsed

into a digital format and other CP models will have their analog outputs switched out by relays on DTS interface
board. CP Format for DTS

CP50 Select “04” or “05” for backup, DTS will switch over Note: BS22 not used
CP55 DTS pulses CP to “Aux” format
CP65 DTS pulses CP to Format 10 or “Dolby Digital” format.
CP100 Select “04” or “05” for backup, DTS will switch over Note: BS22 not used
CP200 Select “04” or “05” for backup, DTS will switch over Note: BS22 not used
CP500 DTS pulses CP to “Format 11”
UltraStereo DTS pulses CP to “Digital” or “digital/ext” formats

2. DTS digital movie defaulting to optical (analog) and not staying in digital.

The sound should automatically default to optical when the DTS player does not see timecode for four seconds.
Verify the green
player will also default to optical if the timecode is sporadic or the DTS

LED on the DTS reader head is glowing brightly and steadily while the film is running. The DTS

CD-ROM discs cannot be read.

*Defaulting during the same place in the movie? If so, ask distributor for replacement reel.

• No cues should be placed within timecode. The DTS player does not recognize them.

*Defaulting sporadically or throughout the film: Is reader’s green LED blinking? It should be solid bright, very

occasional blink is

OK.

• If only one reel blinks, ask distributor for replacement reel.

• If t h e reader blinks every other reel and is in a platter house, turn off the DTS player. Take the unit out

of the rack and open the lid. Look inside, at the timecode card (one with
positioned horizontally across the top row of W1. The jumper should not be installed vertically (vertical
placement is for two projectors only).

LEDs). Verify the jumper is

• Frequent blinking on all reels is usually a reader or tension problem.

•

If the TIMECODE light on the DTS player or reader is blinking, gently squeeze the film between two fingers as it enters
the reader and pull back. If the blinking stops and maintains a steady glow, this indicates more tension is needed.
Tension is added by repositioning the auxiliary flanged roller on the reader so that it has maximum contact with the
film, or add a cleaning roller to system.

• Gently squeeze the film between two fingers as it exits the reader. If the blinking stops, check projector for worn

gears or belts. An oscilloscope should be used to observe signal. See “Checking Timecode With An Oscilloscope”.

• Christie platters: This platter has a spring in the center cluster (center roller) which should be in good condition,

clean and well lubricated. Do not remove it. If removed, it will cause film bounce, which causes the DTS reader to
not see good timecode.

• If the TIMECOD E light is blinking, see “B linking Timecode Reader LED” notice in this book.

• Attach the grounding jumper on the reader’s timecode cable to the projector. Attach the jumper to the

screw that secures the timecode cable to the reader head. The reader’s housing must be electrically
connected to the projector housing. Verify with an ohmmeter. This is needed for projector chassis that are
not properly earth grounded.

• If grounding the projector doesn’t help, replace reader with Rev.F or rework reader’s ground plane per Section VI.

• Make no adjustments to readers with a serial number, unless directed by a DTS engineer. If the reader does

not have a serial number, gently rotate the screw in the largest roller to see if the light stabilizes. If it
doesn’t, replace reader.

• If the reader’s green LED is very dim, replace the reader. (#2 continued next page)

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