Service manual

ARC-15 Parts Layout (5 channel expansion board)
Mic 1 amp
(SSM2019)
Mic 2 amp
(SSM2019)
Mic 1
In
Mic 2
In
CH 2
In
CH 3
In
CH 4
In
CH 5
In
CH 6
In
CH 2
In
CH 3
In
CH 4
In
CH 5
In
CH 6
In
CH 7
In
Stereo Line Channel Input Preamps
CH 1
fader
makeup
gain
amp
CH 2
fader
makeup
gain
amp
CH 3
fader
makeup
gain
amp
CH 4
fader
makeup
gain
amp
CH 5
fader
makeup
gain
amp
CH 1
On Lgc
(CD4049)
CH 2
On Lgc
(CD4049)
CH 3
On Lgc
(CD4049)
CH 4
On Lgc
(CD4049)
CH 5
On Lgc
(CD4049)
CH 1 FET Sw
P-A-Q
(CD4053)
CH 2 FET Sw
P-A-Q
(CD4053)
CH 3 FET Sw
P-A-Q
(CD4053)
CH 4 FET Sw
P-A-Q
(CD4053)
CH 1
P-A-Q Lgc
(CD4049)
CH 2
P-A-Q Lgc
(CD4049)
CH 3
P-A-Q Lgc
(CD4049)
CH 4
P-A-Q Lgc
(CD4049)
CH 5
P-A-Q Lgc
(CD4049)
Mic 3
In
CH 7
In
Mic 3 amp
(SSM2019)
none
mic jumper position
line jumper position
none
mic jumper position
line jumper position
CH 6 select
CH 5 select
CH 3 select
CH 2 select
CH 5
Mute
CH 4
Mute
CH 3
Mute
CH 2
Mute
Add jumper
to mute the
channel
Stereo Line Channel Inputs Mono Mic Channel Inputs
CH 5 FET Sw
P-A-Q
(CD4053)
CN1
CN2
CN3
CN5
CN6
CN4
Note
All unmarked ICs
are NE5532 op amps
CN1
1
2
3
4
5
6
7
8
9
10
Mic 1
+12VDC
Mic 2
-12VDC
Ground (audio)
Ground (audio)
+48VDC
+48VDC
Ground (shield)
Ground (shield
CN2
1
2
3
4
5
6
7
8
9
10
Ch 5 Start logic
nc
Ch 4 Start Logic
nc
Ch 3 Start logic
nc
Ch 2 Start logic
nc
Ch 2 Cue Logic for TB to CR
nc
CN3
1
2
3
4
5
6
7
8
9
10
+12VDC
Gorund (audio)
Ground (audio)
Ground (audio)
CH1 L
nc
Ch 2 L
Ch 1R
Autocue
Ch 2R
CN4
1
2
3
4
5
6
7
8
9
10
nc
nc
nc
nc
+5VDC
+5VDC
Ground
Gorund
-5VDC
-5VDC
CN5
1
2
3
4
5
6
7
8
9
10
nc
nc
nc
nc
+5VDC
+5VDC
+14VDC
+12VDC
Gorund
Ground
CN6
1
2
3
4
5
6
7
8
9
10
nc
Mute logic
CR Mic to Hybrid talkback
Ground
CR MicTakback to Studio
Cue
Aud L bus
Aud R bus
Pgm L bus
Pgm R bus
1.19