Dolby Laboratories SDU4 - Manual (Page 20)

4-1
SECTION 4
BLOCK DIAGRAM
PIN 1
4 = CHASSIS
3 = LO
2 = HI
1 = CHASSIS
NC
NC
NC
REMOTE
RT R
S
LT
L
C
POWER-ON
MODE SELECT
DOLBY
AUTO
MANUAL
11
TO REMOTE FADER
1
SELECT
FADER
CONTROL
VOLTAGE GEN
MUTE
A
19
FADER
LOCAL
AND
LOGIC
SURROUND DOLBY
MONO
22
OUTPUT
AMP
V
18
AMP
OUTPUT
U
17
P501
2
3
1
CENTER
P502
2
3
1
RIGHT
AMP
OUTPUT
T
16
P503
2
3
1
AMP
OUTPUT
15
S
SURROUND
P504
2
3
1
FLASHER
&
(CSCS FLASH)
MONO
STEREO
(LCRS FLASH)
W 20
LEFT
Y
CSCS
MONO
STEREO
MODE
SEQUENCER
8
P
STEREO
SELECTION
J503
12
DOLBY SURROUND
C
NOISE
MONO
STEREO
LCRS
11
J503
7
M
6
REMOTE MODE SELECT
SURROUND
TRIM
LEVEL
TRIM
LEVEL
TRIM
LEVEL
TRIM
LEVEL
CAT.NO.344
LT
21
MONITOR POINTS
J503
RT
23
E
3
VCA
VCA
VCA
K
5
J503
VCA
SPKR SW
CENTER
3
H
F
2
C
L
J
4
LOOP
SWITCH
R
1
2
5
OFF
LEFT TOTAL
Z
RIGHT TOTAL
J502
2
3
1
21
VAR.
ATTEN. AMP
INPUT
4
S
SURROUND
DOLBY
DRIVER
LED
SDU4 BLOCK DIAGRAM
A3B3708 REV 2
PINK
NOISE
GEN
AMP
INPUT VAR.
ATTEN.
J501
2
3
1
(LEDS)
LEVEL
METERS
CAT. 150
10
7
14 15
4
5
6
1
SURR MONO
MAIN