Service manual

+12V
led
-12V
led
-5V
led
+5V
led
Mic4 amp
(SSM2019)
Mic 5 amp
(SSM2019)
Mic4
In
Mic5
In
48V
phntm
power
CH 8
In
CH9
In
CH10
In
CH11
In
CH12
In
CH13
In
Ch14
USB
PGM
Out (L)
PGM
Out (R)
Phone
In
Phone
Out
Phone
Logic
PGM
Out
AUD
Out
Mono
Out
Mon
Out
Air
In
CH 9
In
Cue
In
DC
Power
Mute
FET Sw
(CD4053)
Monitor
Select
FET Sw
(CD4052)
Headphone
Autocue
FET Sw
(CD4053)
Phone
Talkback
FET Sw
(CD4053)
CN11
Volume
Control
Cable Conn
Cue
Speaker Amp
(LM386)
Headphone
Amp Left
(LM386)
Headphone
Amp Right
(LM386)
Summing amps
Pgm
Aud
Cue
Mic
Talkback
CN13 Remote Logic Cable
Mon Sel Lgc
Quad ‘AND’ gate
(74AC08)
Mon Sel Lgc
Dual ‘D’ flip flop
(74AC74)
PGM
unbal
Out
AUD
unbal
Out
Mono
Mix
Out
Monitor
Out
CN12
RS232 Cable
RS232 Logic
Transistors
PGM
L out
PGM
R out
Phone
Out
Phone Logic
Reed relays
& Transistors
USB Codec
(PCM2900)
12MHz
Xstal
Codec
Record
Filter
Phone
In
Codec
Output
Filter
CH 8
In
CH9
In
CH10
In
CH 11
In
CH12
In
CH13
In
Channel Input Preamps
CH 6
fader
makeup
gain
amp
CH 7
fader
makeup
gain
amp
CH 8
fader
makeup
gain
amp
CH 9
fader
makeup
gain
amp
CH 10
fader
makeup
gain
amp
CH 11
fader
makeup
gain
amp
CH 12
fader
makeup
gain
amp
CH 13
fader
makeup
gain
amp
CH 14
fader
makeup
gain
amp
CH 15
fader
makeup
gain
amp
CH 6
On Lgc
(CD4049)
CH 7
On Lgc
(CD4049)
CH 8
On Lgc
(CD4049)
CH 9
On Lgc
(CD4049)
CH 10
On Lgc
(CD4049)
CH 11
On Lgc
(CD4049)
CH 12
On Lgc
(CD4049)
CH 13
On Lgc
(CD4049)
CH 14
On Lgc
(CD4049)
CH 15
On Lgc
(CD4049)
CH 6 FET Sw
P-A-Q
(CD4053)
CH 7 FET Sw
P-A-Q
(CD4053)
CH 8 FET Sw
P-A-Q
(CD4053)
CH 9 FET Sw
P-A-Q
(CD4053)
CH 10 FET Sw
P-A-Q
(CD4053)
CH 11FET Sw
P-A-Q
(CD4053)
CH 12 FET Sw
P-A-Q
(CD4053)
CH13 FET Sw
P-A-Q
(CD4053)
CH 14 FET Sw
P-A-Q
(CD4053)
CH 15 FET Sw
P-A-Q
(CD4053)
CH 6
P-A-Q Lgc
(CD4049)
CH 7
P-A-Q Lgc
(CD4049)
CH 8
P-A-Q Lgc
(CD4049)
CH 9
P-A-Q Lgc
(CD4049)
CH 10
P-A-Q Lgc
(CD4049)
CH 11
P-A-Q Lgc
(CD4049)
CH12
P-A-Q Lgc
(CD4049)
CH 13
P-A-Q Lgc
(CD4049)
CH 14
P-A-Q Lgc
(CD4049)
CH 15
P-A-Q Lgc
(CD4049)
Monitor
SW amp
Phone
SW amp
PGM
mix
amp
AUD
mix
amp
Mix the Phone
channel
with the Main
Output buses
Talk
Air
Pgm
Aud
Note
All unmarked ICs
are NE5532 op amps
CH 8CH9CH 10CH11CH12CH13
Ch 14 In
Unbal/USB
L L R R
USB
REC IN
A P A P
A
/
Q
P
A
/
Q
P
to 5 ch Expan Bd
to VU Meter bd
in VU housing
ARC-15 Parts Layout (10 channel main board)
CN1
CN3
CN4
CN5
CN6
Note#1
CN1-6 correspond
with CN1-6 on the 5
channel PC board
CN2
CN7
CN14
Cue Speaker
Cable Conn
CN15
Headphone
Cable Conn
CN10
ARC10
VU Meter
Cable Conn
1.17