Service manual

ARC-15 Electronic Block Diagram
F
A
D
E
R
PGM
SW
AUD
SW
TALK
SW
PGM
AUD
TALK
ON
Logic
Logic
Logic
F
A
D
E
R
PGM
SW
AUD
SW
CUE
SW
PGM
AUD
CUE
ON
Logic
Logic
Logic
F
A
D
E
R
PGM
SW
AUD
SW
CUE
SW
PGM
AUD
CUE
ON
Logic
Logic
Logic
F
A
D
E
R
PGM
SW
AUD
SW
CUE
SW
PGM
AUD
CUE
ON
Logic
Logic
Logic
Trim
Trim
TALK
Trim
F
A
D
E
R
M
U
T
E
F
A
D
E
R
M
U
T
E
F
A
D
E
R
PGM
AUD
AIR
L
O
G
I
C
FET
SW
Trim
Trim
C
O
D
E
C
Stt/Stp
Trim
Trim
Stt/Stp
CONTROL ROOM
MONITOR OUTPUT
to powered speakers
(-10dBu RCA phono)
INTERNAL CUE SPEAKER
in VU meter bridge
HEADPHONE OUTPUT
for 8 ohm or Hi-Z headphones
(1/4" Headphone Jack)
AIR MONITOR INPUT
(-10 dBu RCA phono)
LOGIC OUTPUT (15 pin D-sub)
1) Control Room Mute Logic
(for On Air light)
2-7) Ch 2,3,4,5,13,15 On-off logic
8) Talkback audio to Studio
9) Talkback audio from Studio
(into Cue bus)
10) Autocue logic (for TB)
11) Ch 2 Cue logic for TB
12) Studio Monitor L out
13) Studio Monitor R out
14) +12VDC
15) Ground
PROGRAM OUTPUT- BALANCED
(+4 dBu XLR)
PROGRAM OUTPUT- UNBALANCED
(-10dBu RCA phono)
AUDITION OUTPUT- UNBALANCED
(-10dBu RCA phono)
OUTPUT TO PHONE HYBRID
(balanced, +4 dBu XLR)
CUE INPUT
for Cueing a PC or Talkback
(-10dBu, 1/8" Headphone Jack)
MIC CHANNELS
MIC INPUT
balanced
(-50dBu, XLR)
48V PHANTOM
POWER
(2mm PLUG)
LINE CHANNELS
STEREO LINE
CHANNEL 14
LOGIC
RS232 serial
connection to PC
(9 pin D-SUB)
PC PLAY / RECORD
USB connection
to WINDOWS PC
(USB connector)
CHANNEL 15
INPUT FROM
PHONE HYBRID
balanced, mono
(+4 dBu XLR)
HYBRID LOGIC
On-off
(RJ45)
AUDITION MONO MIX OUTPUT
(unbalanced, -10dBu, RCA phono)
PROGRAM MONO MIX OUTPUT
(unbalanced, -10dBu, RCA phono)
FET
SW
Cue Logic ->
Cue Sum
I
N
P
U
T
C
H
A
N
N
E
L
S
O
U
T
P
U
T
S
/
M
O
N
I
T
O
R
I
N
G
Trim
Balanced, +4 dBu,
stereo inputs
(RJ45)
FET
SW
D
B
9
D
B
1
5
Air in
Pgm in
Aud in
SW
out
Record
Play
Pwr
Pwr
Pwr
VU meter
LEFT
VU meter
RIGHT
PGM
Sum
AUD
Sum
Phone
Mix
Monitor
Selector
Talk to
Caller
Talk to
Studio
PL-PR-AL-AR-Q-TB
PL-PR-AL-AR-Q-TB
L
R
L
R
L/R
L/R
L
R
L
R
L
R
L + R
L + R
L/R
NOTE #1
if this option is installed but not
being used, internal jumpers can
convert the input into a stan-
dard unbalanced, stereo, -10dBu,
line input channel (RCA phono)
NOTE #2
if a phone hybrid is not used, this channel can be
used as a standard mono channel with a balanced
+4dBu source
1.16