Yamaha IM8-32 Service Manual page 234

H G
BLOCK DIAGRAM (IM8-40/IM8-32/IM8-24)
INJK IN1 IM8-40: CH1 to CH40
IM8-32: CH1 to CH32
CH INPUT IM8-24: CH1 to CH24
[-60 dBu to -16 dBu] PHANTOM
[-34 dBu to +10 dBu]
+48 V
IM8-40: CH1 to CH40
IM8-32: CH1 to CH32
IM8-24: CH1 to CH24 RE
INPUT A
N [0 dBu]
PAD HA
INPUT B
INV R HPF
HPF
PAD GAIN
[-60 dBu to -16 dBu]
[-34 dBu to +10 dBu]
INSERT I/O
BA
[0 dBu]
INV
4-Stage EQ
DIRECT OUT
Inner Jumper
Pre EQ
J
(Factory set)
Pre FADER
DIRECT OUT
Post FADER
[0 dBu]
STJK ST1
EQ
ST CH INPUT 1 to 4
PAD HA INV 4-Stage EQ
[0 dBu]
LINE L
[-34 dBu to +10 dBu]
GAIN [-34 dBu to +10 dBu]
PAD HA INV 4-Stage EQ
LINE R
[-34 dBu to +10 dBu]
MASJK
L (MONO)
RETURN 1–4
[+4 dBu]
R
2TR IN
[-10 dBv]
[-7.8 dBu]
TB IN
[-50 dBu]
POWER SUPPLY
POWER
Clip Level (CH INPUT A, B) Clip Level (ST CH LINE IN)
+30 dBu
+20 dBu
Clip Level (CH)
ST CH LINE IN [+10 dBu]
CH INPUT A, B [+10 dBu]
+10 dBu
0 dBu
INSERT I/O,
DIRECT OUT
[0 dBu]
-10 dBu
CH INPUT A, B [-16 dBu]
-20 dBu
-30 dBu
CH INPUT A, B [-34 dBu] ST CH LINE IN [-34 dBu]
-40 dBu
-50 dBu
CH INPUT A, B [-60 dBu]
-60 dBu
28CA1-2001033136-1
F E
COMP IN2
RE PEAK
YE 0 dB
GR -20 dB
CH Fader
PAN
COMP
INV INV BA
[0 dBu] [0 dBu] [0 dBu]
[-10 dBu]
1 CTRL
ON
COMP 2 YE
3
4
EQ
MUTE PRE
AUX1
AUX2
AUX PRE
Inner Jumper AUX3–4
AUX5–6
J
PRE
AUX7
Pre EQ Post EQ
(Factory set)
AUX8
PFL
YE
ST2
BAL
[0 dBu]
[-10 dBu]
INV INV BA
[0 dBu]
[0 dBu]
RE
PEAK
YE
ST CH Fader
0 dB
GR -20 dB
BA
[0 dBu]
PRE
AUX1
INV INV BA
AUX2
AUX3–4
MUTE SUM INV
[0 dBu] AUX5–6
1
CTRL
PRE
ON
AUX7
2
YE
AUX8
3
4
PFL
YE
MAS1
RETURN
[0 dBu] [-6 dBu] [0 dBu]
BA BA
BA BA
AUX1
AUX2–AUX3
STJK
AUX4
(MINI JACK)
YE
2TR IN
SUM INV BA
L
[0 dBu] [-6 dBu] [0 dBu]
USB IN (L)
INV BA
R SUM
USB IN (R)
YE
TB ON
[-5 dBu] [-11 dBu] [0 dBu]
HA BA
YE
(ON: BLINK)
SUM LAMP
LAMP1
[12V]
To Mixer [+48V]
LAMP2
To Mixer [±15V]
POWER SUPPLY
[12V]
To Mixer [+12V]
To LAMP [+12V]
LAMP3
[12V]
LAMP3 40ch
Clip Level
(RETURN)
Clip Level (USB IN)
Clip Level (2TR IN)
RETURN [+4 dBu]
USB IN [0 dBu]
2TR IN [-7.8 dBu]
RETURN RETURN 2TR IN
(PAD+BA) [Nominal: -6 dB] [Nominal: -6 dB]
CH Fader
[Nominal: -10 dB]
Clip Level (TB)
TB IN [-50 dBu]
D
BUS1 BUS2L BUS2R
BUS3 BUS4
SUM MAS2
[0 dBu]
1–2
INSERT
[0 dBu]
3–4, 5–6
SUM INV
[0 dBu]
7–8
AFL
ST GR
MONO
ST
[+4 dBu]
[-6 dBu]
MONO
[+4 dBu]
[0 dBu]
AFL
[0 dBu]
GR
1–2
[0 dBu]
3–4, 5–6
SUM INV
MASJK
7–8
ST
[0 dBu]
MONO SUM INV
[0 dBu]
PFL
[0 dBu]
[-6 dBu]
YE
SUM INV
[0 dBu] [0 dBu]
AFL
[+4 dBu]
[0 dBu]
GR
1–2
3–4, 5–6
USB OUT (L)
7–8 USB OUT (R)
ST
MONO
SUM INV
[-6 dBu] [0 dBu]
[-6 dBu]
AFL
[+4 dBu]
GR
[-6 dBu]
AFL MUTE
SUM
PFL [0 dBu]
SUM
[-6 dBu]
ST
SUM SUM
[0 dBu]
MONO
SUM SUM
PFL
[0 dBu]
AFL
ST+MONO
GR
CTRL
AUX1–2 PFL
YE
AUX3–4
AUX5–6
AUX7–8
MUTE MASTER
GROUP1–8 MAS1
M1–2
M1 BUS RED
M2 BUS
M3–4
M3 BUS
M4 BUS CTRL RED
RED
RED
Clip Level (GROUP)
AFL (GROUP) GROUP OUT [+4 dBu]
GROUP
AFL (ST, MONO, AUX) BUS (GROUP, ST, MONO, PFL, AFL) INSERT I/O [0 dBu]
BUS (AUX)
AUX INV
AUX (CH, RETURN)
[Nominal: -6 dB]
GROUP Fader
TB
[Nominal: -10 dB]
[Nominal: -6 dB]
C B
IM8-40/IM8-32/IM8-24
MAS1
PEAK
MASJK
0 dB
-20 dB
GROUP
ON
[+4 dBu]
BA
[-10 dBu]
G1
YE M1–4 BUS (from TB)
[+4 dBu]
G2
G3
G4
MATRIX
PAN
G5
SUM
[0 dBu]
[-6 dBu]
G6
G7
G8
L
[0 dBu]
R
MONO
[0 dBu] AFL
[+4 dBu]
GR
[+4 dBu]
SUM
MASJK
INSERT
[0 dBu]
ST L
[0 dBu]
BA
[0 dBu]
[-10 dBu]
YE ON
INSERT
[0 dBu]
BA
ST R
MASJK PEAK
INSERT 0 dB
[0 dBu]
-20 dB
MONO
ON
BA
[-10 dBu] [0 dBu]
YE
ST SUM INV
[0 dBu]
MONO SUM INV
MAS1
PEAK SUM
MASJK
INSERT
[0 dBu] 0 dB
-20 dB
BA
[-10 dBu] [0 dBu]
MAS2
DR
DR
DR
DR
BA
[-6 dBu]
[0 dBu]
MONITOR
BA
SUM
PA
[-16 dBu] [+4 dBu]
PHONES
PA
1 USB
USB OUT (L) LPF
[0 dBu]
LIN D-
2 USB
POWER USB OUT (R) LPF
RIN
AUDIO D+
GR
LO
3 GND
PCM2900
REG
RO
USB IN (L) LPF
(Bus Powered)
4 Vbus
[0 dBu]
USB
USB IN (R) LPF
12 MHz
Clip Level (ST, MONO, AUX)
Clip Level (MATRIX)
Clip Level
(REC OUT)
ST OUT, MONO OUT,
MATRIX OUT [+4 dBu]
AUX SEND [+4 dBu] MATRIX (GROUP) MATRIX SUM
ST, MONO, AUX
INSERT I/O [0 dBu] MATRIX (ST, MONO)
MATRIX
(GROUP, ST, MONO)
REC OUT [-10 dBV] [Nominal: 0 dB]
MATRIX
[Nominal: -6 dB]
ST, MONO, AUX Fader
[Nominal: -10 dB]
PHONES
[Nominal: -16 dB]
BLOCK DIAGRAM (IM8-40/IM8-32/IM8-24)
A
MASJK
1
GROUP OUT
1–8
[+4 dBu]
INV MTRX OUT
1–4
[+4 dBu]
2
L
ST OUT
[+4 dBu]
R
MONO OUT
[+4 dBu]
L
REC OUT
[-10 dBv]
R
3
AUX SEND
1–8
[+4 dB]
PEAK
+10
+6
+3
0
-3
-6
-10
-15
-20
-25
-30
L
MONITOR OUT
[+4 dB]
R 4
PHONES
[3 mW 40 ohms]
STJK
+30 dBu
Clip Level (MONITOR)
+20 dBu
Clip Level (PHONES) +10 dBu
5
MONITOR OUT [+4 dBu]
0 dBu
PHONES [3mW@40 ohms]
-10 dBu
MONITOR
-20 dBu
[Nominal: -6 dB]
-30 dBu
-40 dBu
-50 dBu
-60 dBu
3
6