Cinema Cover - Audio Design Associates

Laserdisc Player with only an AC-3 RF Output
The Cinema Reference Mach II features an input label for connection to an AC-3 RF demodulator,
needed for laserdisc players that have a Dolby Digital AC-3 RF output. Some players manufactured
after 1994 feature this output while others may have been modified with an additional AC-3 RF Output
(MSB Technologies provided this modification). These players require an external AC-3 RF demodulator
(ADA’s RFD-1) for playback of Dolby Digital (a.k.a. AC-3) laserdiscs using Dolby Digital decoding.
Here, the laserdisc’s AC-3 RF output is passed into the RFD-1 and then to an open digital coaxial
input on the Cinema Reference Mach II. You need to use one of the four digital coax inputs for
connection to the RFD-1.
The Out of the Box configuration
for the LASER AC3 input
label is the Digital 2 coaxial
jack. Please note, you will also
need to make the secondary
optical TOS-Link digital audio
connection (for non-AC3
laserdiscs) and video connections
to the Cinema Reference
Mach II. As such, when playing
regular stereo or DTS
laserdiscs, you will need to
select the LASERDISC input
label. When playing Dolby
Digital (AC-3) laserdiscs, you
will need to select the LASER
AC3 input label.
Laserdisc History
As a point of information, the
laserdisc, introduced in the
late 1970’s, today contains
four audio channels. Two
channels contain PCM digital
audio for playback of standard
laserdiscs (CDs also contain
two channels of PCM digital
audio). The other two chan-
Opitcal Digital
Audio Out
"Dolby", "Pro Logic", & the double-D Symbol are trademarks of Dolby Laboratories. All rights reserved.
Manufactured under license from Digital Theater Systems, Inc. US Pat. No. 5,451,942, 5,956,764, 5,974,380, 5,978,762 and other worldwide
patents issued and pending. "DTS", "DTS-ES Extended Surround", and "Neo 6" are trademarks of Digital Theater Systems, Inc. ' 1996,
2000 Digital Theater Systems, Inc. All rights reserved.
Manufactured under license from Lucasfilm Ltd. U.S. patent numbers 5,043,970; 5,189,703; and/or 5,222,059. European patent number
0323830. Other U.S. and foreign patents pending. Lucasfilm and THX are trademarks or registered trademarks of Lucasfilm Ltd. Surround
EX is a jointly developed technology of THX and Dolby Laboratories, Inc., and is a trademark of Dolby. Used under authorization.
PROCESSED
VGA¥RGB¥HDTV OUTPUT
COMPOSITE & S-VIDEO
ARE UP-CONVERTED &
LINE-DOUBLED
VGA ONLY
8
VGA¥RGBHV¥HDTV INPUTS
2 3 4
/ /
/ /
/
/ /
/ /
/ /
PIN +/- CHAN PIN +/- CHAN
1
VIDEO INPUTS
3 5 7
1 14 LT 7 20 SBL
VIDEO OUT
8 CHANNEL DB-25 INPUT
2 15 CT 8 21 SBR
3 16 RT 9 /10/22 SHLD
4 17 SB 11 23 R.T.A
5 18 SL 12 24 R.T.B
1 REC 6 19 SR 13 25 R.T.C
13 1 PIN
25 14
POINTS COMPONENT VIDEO
Y PB/B-Y PR/R-Y Y PB/B-Y
RECORD
PR/R-Y OUT
ADA NET“
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION!
RISQUE DE CHOC ELECTRIQUE.
NE PAS OUVRIR
MULTI-PIN LFE SUM
MADE IN U.S.A.
0dB
+10dB
MAIN REC
S-VIDEO INPUTS
1 2 3 4
1
3
OUTPUT
L
WARNING!
Risk Of Hazardous Energy! Make Proper Connections.
AVERTISSEMENT!
Energie Electrique Dangereuse! Faire Des Connexions Propres
Pour L’Hautparleur. Voir La Notice De Fonctionnement.
2
L
1
4
2
6
L
3
8
4
2 OSD
L
5 6
L
7 8
SBL
2
LS L
MAIN
C
Y
DIGITAL AUDIO
INPUTS
OPTICAL INPUTS
PB
1
PR
3
R
DATA PORT 12VDC OUT
Serial Data 100mA Max Per
ADA Bus¤ DC 1 DC 2
1 2 3 4 1- 2+ 1- 2+
CAUTION: Disconnect Supply Cord Before Servicing.
ATTENTION: Debrancher Avant Le Depannage.
Voltage
Selector &
Safety Fuse
On This
Side
115 V
115V 230V
R
R
R
AUDIO INPUTS
R
SBR RS R SUB 1 2 3 4 2 4 GND OUT IN 12VDC
Use Same
AC OUTPUT AC INPUT Value Fuse
115V~1AS.B.
10A~ Max Switched 115V~60Hz/230V~50Hz 230V~.5AS.B.
RFD-1
DIGITAL AC-3 RF DEMODULATOR
WARNING! RISK OF HAZARDOUS ENERGY! MAKE PROPER CONNECTIONS.
AVERTISSEMENT! ENERGIE ELECTRIQUE DANGEREUSE! FAIRE DES CONNEXIONS
PROPRES POUR L'HAUTPARLEUR. VOIR LA NOTICE DE FONCTIONNEMENT.
CAUTION: DISCONNECT SUPPLY CORD BEFORE SERVICING.
ATTENTION: DEBRANCHER AVANT LE DEPANNAGE.
LASER DISC PLAYER
(With AC-3 RF Output But No Internal RF Demodulator)
Video
Out
Video Cable
DIGITAL
AC-3 OUT
OUTPUT
"DOLBY", "AC-3", AND THE DOUBLE-D
SYMBOL ARE TRADEMARKS OF DOLBY
LABORATORIES LICENSING CORP.
In 1994, when Dolby Laboratories introduced AC-3 (now called Dolby Digital) for the home theater
market, they decided that it would be best to include the AC-3 multi-channel digital bit stream on every
laserdisc pressed (rather than release a special-order laserdisc). Because all players since the mid-
80’s read the digital PCM channels (rendering the mono-FM channels obsolete), Dolby decided to use
one of these two antiquated mono-FM channels to embed (or modulate) the AC-3 bit stream. Thus, in
order to decode the AC-3 bit stream from a laserdisc, one must first demodulate the mono-FM channel
to extract the bit stream. In essence, the RFD-1 is a radio-frequency tuner (demodulator), hence the
terminology-RFD. As the mono-FM signal passes through the RFD-1, the AC-3 bit stream is demodulated,
emerging from the RFD-1 as a Dolby Digital signal, the exact same output as that of a DVD
player.
Page 27
S-Video
Output
TOS-Link Optical Digital Interconnect
S-Video Cable
(If Input is available)
1
4
ON
DC INPUT MUTE
OFF
RF
AC-3 IN
INPUT
1 2
115 V
VOLTAGE SELECTOR
Dolby Digital
AC-3 RF Output
VGASWITCHER
AC VOLTAGE
115 V
115V~60Hz/230V~50Hz
To Preamplifier
(110V)
2/10A S.B.
(220V)
1/10A S.B. 110/220 VAC SWITCHED
50-60 Hz, 15 WATT
ADA RFD-1 AC-3 RF Demodulator
To RFD-1
115V~2/10 A.S.B.
230V~1/10 A.S.B.
CINEMA REFERENCE MACH II
HOME THEATER CONTROLLER
nels on a laserdisc date back to the late 1970’s, prior to the implementation of PCM digital audio
(1983). Here, an audio signal is modulated onto a mono FM radio frequency. There is a mono FM
channel for left and another for right. Those who viewed laser discs prior to the mid-1980’s, listened to
the analog channels as the digital channels did not yet exist.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION!
RISQUE DE CHOC ELECTRIQUE.
NE PAS OUVRIR
MADE IN U.S.A.
FUSE WARNING:
Risk of Fire! Replace Fuse
With Same Type & Rating.