Yamaha MW12 Service Manual page 49

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<Page 1>
IBLOCK DIAGRAM & LEVEL DIAGRAM
JACK 1/2
MAIN
PHANTOM +48V
SW506
SW501
+48V
SW601
Q801~804 SW701
LD504
Q701~704 SW801
JK571,671,771,871
Q601~604
MIC
IC501,601,701,801
Q501~504
[-60 ~ -16dBu] [0dBu]
HA
(CH1 ~ 4)
5 7
HPF
JK572,672,772,872
6
80Hz 12dB/Oct
LINE
GAIN
[-34 ~ +10dBu]
[16 ~ 60dB]
JK573,673,773,873
[0dBu]
INSERT I/O
[0dBu]
Q901~904
QA01~A04
JK971,A71
GAIN +30dB
IC901,A01
MIC
[-30 ~ +14dBu]
[-60 ~ -16dBu] 80
HA
SW901,A01
5 7
HPF
6
IC902,A02
JK972,A72
3 1
HA
L
(MONO)
GAIN Trim
(CH5/6,7/8)
[6 ~ 50dB]
[-34 ~ +10dBu]
JK973,A73
5 7
HA
R
GAIN +10dB
ICB01,C01
JKB71,C71
3 1
HA
[0dBu]
L
JKB73 1/2
(CH9/10,11/12)
[-10dBu]
JKB72,C72
5 7
HA
R
JKB73 2/2
JKD71
L
(MONO)
RETURN JKD72
[+4dBu]
R
JKC73 1/2
L
2TR IN
[-10Bv]
R
[-7.8dBu]
PS
IC01
ON/STANDBY
F01,02
IN
SW01 Regulator
1 250V 2A
AC POWER
COM
ADAPTOR 3
PA 20 IC02
2
COM
IN
Regulator
Yellow
IC03
OUT
IN
MAIN Regulator
COM
IC05
D14 Q01
IN
Regulator
D03,04 D07,08 COM
ZD01,02 ZD03,04
60V
+30dBu
Clip Level
+20dBu
CH IN LINE Gain:Min [+10dBu]
ST CH IN LINE Gain:Min [+10dBu]
+10dBu
0dBu
ST CH IN [-10dBu]
-10dBu
CH IN MIC Gain:Min [-16dBu] ST CH IN MIC Gain:Min [-16dBu]
-20dBu
-30dBu
ST CH IN LINE Gain:Max [-34dBu]
CH IN LINE Gain:Max [-34dBu]
-40dBu
-50dBu
CH IN MIC Gain:Max [-60dBu] ST CH IN MIC Gain:Max [-60dBu]
-60dBu
C
All manuals and user guides at all-guides.com
IC502,702 VR506,606,706,806
Changeable width : ±15dB PAN
Lo : 100Hz (Shelving) PEAK(RED)
IC503,703
LD501,601,
Mid : 2.5KHz (peaking)
Gain +10dB
701,801 CH Fader LD502,602,
Hi : 10KHz (shelving)
702,802
[0dBu]
BA
3-Stage EQ
[-10dBu]
PRE
80
AUX1
Nominal [-10dB]
VR505,605,705,805
LOW MID HIGH
SW502,602,702,802
AUX2
VR508,608,708,808
VR502, VR503, VR504, [0dBu]
602, 603, 604,
702, 703, 704,
PFL
802 803 804
PEAK(RED)
Yellow
LD901,A01 VR906,A06
IC904,A04
Gain +10dB BAL/PAN
IC903,A03
[0dBu]
3 1
3-Stage EQ BA [0dBu]
2 1
[0dBu] [-10dBu] PRE
AUX1
VR905, CH Fader
SW902,
LOW MID HIGH A05
Nominal [-10dB]
A02
VR907,A07
AUX2
6 7 5 7
BA
3-Stage EQ
VR908,A08
VR902, VR903, VR904,
A02 A03 A04
[0dBu]
PFL
Yellow
VRB05,C05
Gain +10dB BAL/PAN
ICB02,C02
2 1 3 1
3-Stage EQ BA [0dBu]
[-10dBu]
[0dBu]
PRE
ICB03,
C03
AUX1
CH Fader SWB01,
VRB04,
LOW MID HIGH
Nominal [-10dB] C01
C04
VRB06,C06
AUX2
6 7 5 7
3-Stage EQ BA
VRB01, VRB02, VRB03, VRB07,C07
C01 C02 C03
RETURN
ICD02
[0dBu]
2 1
INV
ST
VRD02
Gain -4dB
6 7
INV
AUX1
VRD03
Nominal [-6dB]
AUX2
VRD04
2TR IN
[0dBu] [0dBu]
3 1 2 1
BA SUM
VRD01
ICD03 ICD01
Gain 7.8dB Gain 0dB Nominal [-6dB] [-6dBu]
5 7 6 7
BA SUM
OUT
+15V
+15V
OUT -15V
-15V
+12V (LED)
+12V (LED,METER)
OUT
+48V (PHANTOM)
+48V
(PHANTOM)
43V
Clip Level Clip Level Clip Level
CH AUX
[Nominal : -6dB]
RETURN [+4dBu]
2TR IN [-10dBV]
[-7.8dBu]
CH Level
ST CH Level
ST CH AUX
[Nominal : -10dB]
[Nominal : -6dB]
Note:
The level display and the level diagram in the block diagram are the values in the following.
Level VR : Nominal
BAL/PAN : Max(each channel)
D E
Gain
CH +6dB
ST CH +11dB AUX1 SEND
SW503,603,703,803 EFECT RTN +11dB
[0dBu] RETURN +11dB [0dBu]
2 1
SUM
ST
ICF01
Yellow AUX2 SEND
SW504,604,704,804
G1-2 6 7 [0dBu]
[0dBu] SUM
[-6dBu]
Nominal [-6dB]
VR507,607,707,807
[0dBu]
2 1
SUM
[-6dBu]
Gain
Nominal [-6dB]
CH 0dB
ICE01
VRE01
ST CH 0dB
6 7
SUM
SW505,605,705,805
LD503,603,703,803
SW905,A05
[0dBu]
LD902,A02
ST Gain
CH,ST,CH,EFFECT,RTN 0dB
SW903,A03
RETURN,2TR IN +6dB
G1-2 [0dBu]
GROUP -4dB
[-14dBu]
Nominal [-6dB]
[0dBu]
2 1
SUM
[-14dBu]
ICG01
SW904,A04
LD903,A03
6 7
SUM
SWB03,C03
[0dBu]
LDB01,C01
ST
SWB04,C04
G1-2 [0dBu]
ST/GROUP
SWG01
[-14dBu]
Nominal [-6dB]
[-14dBu]
Nominal [-6dB]
2
SUM
SWB02,C02
ICG02
LDB02,C02
Gain 0dB
PFL
Yellow
6
SUM
Nominal [-6dB]
QG03
[0dBu]
[-14dBu] QG04
[-14dBu]
TO ST/TO C-R
fc 24KHz, 12dB/oct
SWD01 IC103-1/2
2
LPF
[0dBu] Gain -20dB
IC103-2/2
6
LPF
+15V +15V
+15V
-15V -15V IC104-1/2
8
1
[0dBu]
Gain +20dB
IC104-2/2
7
4
-15V
fc 24KHz, 12dB/oct
Clip Level
AUX SEND [+4dBu]
RETURN AUX SEND
2TR IN [Nominal : -6dB]
[Nominal : -6dB]
F G
VRF01
[-6dBu]
5 7
BA
ICF02
Nominal [-6dB]
Gain +10dB
VRF02
[-6dBu]
3 1
BA
Nominal [-6dB]
[-10dBu]
5 7
BA
ICE02
GROUP Fader
Gain +14dB
Nominal [-10dB]
BA
3 1
SWE01
1 2
INV
Gain -4dB ICE03
7 6
INV
TO ST
ICG06
7
[-10dBu]
3 1 5
BA
2 1
[0dBu]
VRG01 ST Fader ICG03
Gain +4dB(RI=600 )
Nominal [-10dB]
ICG07
7
5
5 7
BA
2 1
QG01
Meter 12 Point & Peak
LDH01-12
ICH01 +12V
QG02
DR
Gain +20dB
1 2 1 2 1
SUM INV
[0dBu] [0dBu]
[-16dBu]
ICG04 ICH03
CR/PHONES
Gain 0dB
VRH01 Nominal [-16dB]
7 6 7 6 7
SUM INV
DR
ICH02 +12V
JACK
LDH13-24
Meter 12 Point & Peak
USB
+15V
USB
8 1
IC101-28P
2 1
D- JK101
2
LIN
12 USB
7 D+
AUDIO 1
3 4
RIN
4
13
4, GND
PCM2900
-15V
LO 26
(BUS-
16 IC102
Powered) 10 REG
RO
2
3.7V
LPF 15
Vbus
3
20 21
6
LPF (S): Soldered
12MHz
Clip Level Clip Level Clip Level
GROUP OUT [+4dBu] CR OUT [+4dBu]
ST OUT [+4dBu]
PHONES [3mW@40 ]
GROUP Fader ST Master
[Nominal : -10dB] [Nominal : -10dB]
C-R/PHONES
[Nominal : -16dB]
28CA1-2000010491
H
MW12
1
JKF71
AUX1
SEND
JKF72
+4dBu
AUX2
JKE71
1
GROUP OUT
JKE72
+4dBu
2
2
JKG71
JKG72
L
JKG73
ST OUT
+4dBu
JKG74
R
3
L
REC OUT
JKC73 2/2
-10dBv
(-7.8dBu)
R
JKG75
L
CR OUT
JKG76
+4dBu
R
2/2 4
JKH01
PHONES
(3mW@40 )
5
+30dBu
+20dBu
+10dBu
0dBu
-10dBu
-20dBu
-30dBu
6
-40dBu
-50dBu
-60dBu