Stagepas 300 Block Diagram - Yamaha STAGEPAS 300 Service Manual

A B
Q Q

STAGEPAS 300 BLOCK DIAGRAM

3 7 6 3 1 5 1 5 0
INPUT
CH1,2: IC101
CH3,4: IC201
Normal phase
B+15
JK102,202
,302,402
3,5
1 2 [ - 26dBu]
8
1,7
[-61/-31dBu] HA
2,6
3
4
CH1-4
R106
B-15
JK101,201
MIC
,301,401 R107 (Gain=35dB)
[-51/-21dBu]
LINE
10dBdown
(Gain=5dB)
IC501
(8P)
B+15
JK501
8 [ - 26dBu]
5 7
BA
L
Normal phase
IC501
L
CH5/6 (8P)
3
[-21dBu] 1
BA
R 4
B-15
JK502
Normal phase
R IC701
(8P) B+15
8 [-26dBu]
5
7
BA
L
Normal phase
CH7/8
IC701
(8P)
[-21dBu]
3
1
BA
R
4
B-15
JK503
Normal phase
T E
L 1 3 9 4 2 2 9 6 5 1 3
:Normal phase
:Reversed phase
WARNING
Components having special characteristics are
marked and must be replaced with parts having
specification equal to those originally installed.
+30dBu
+20dBu
+10dBu
0dBu
-10dBu
Hi-Z(PAD ON) [-21dBu]
-20dBu
LINE [-21dBu]
Lo-Z(PAD ON) [-31dBu]
-30dBu
-40dBu
w w w
Hi-Z(PAD OFF) [-51dBu]
-50dBu
Lo-Z(PAD OFF) [-61dBu]
-60dBu
MIC [-61dBu]
.
STAGEPAS 300
C D
VR
*1
CH1: IC102
CH1: IC102 CH1: R124
CH2: IC202
CH2: IC202 CH2: R224
CH3: IC302
CH3: IC302 CH3: R324
CH4: IC402
CH4: IC402 CH4: R424
(8P)
(8P) B+15
Normal phase *2
Reversed phase CH1: R129
2 8
[-8dBu]
*1 CH2: R229
1 5 7
2-Stage EQ BA CH3: R329
4 CH4: R429
*2
*3
LOW HIGH B-15
CH1: S102
Lo: 100Hz
Hi: 10kHz
*3
LEVEL CH2: S202
(shelving) (shelving)
CH3: S303
VR101,201 VR102,202 VR103,203
CH4: S402
,301,401 ,302,402 ,303,403
*4
REVERB *4
IC502
IC502
B+15 CH1: D101
(8P)
(8P)
Normal CH2: D201
2 Reversed phase phase
8 R527 CH3: D301
[ - 8dBu]
1
5 7
CH4: D401
BA
2-Stage EQ
4
IC106
IC203
(8p)
LOW B-15
HIGH (8P)
Normal
VR502 LEVEL
VR501 Reversed phase phase B+15
VR503
B+15
8 SPEECH
2 1
1
2 8
R528 SUM HPF
1
5
7 3 2
BA
2-Stage EQ
MUSIC
4
Reversed phase Normal
phase
IC503 B-15
IC203 IC106 SPEECH
(8P) IC503
(8P) (8p)
MUSIC
(8P)
SPEECH
IC702
6 7 7
IC702
B+15 SUM HPF
(8P)
6
(8P) Normal 5
4
2 phase MUSIC
Reversed phase 8
R727
[ - 8dBu]
1
5 7
BA B-15
2-Stage EQ Reversed
4 phase
Normal phase
B-15
LOW HIGH ON side: MUSIC (LED lighting)
LEVEL ON MUSIC(LED
VR701 VR702
VR703
B+15
2
R728
1
5 7
2-Stage EQ BA
4
Normal
Reversed phase
phase
IC703 B-15
IC703
VR601
(8P)
(8P)
R137
REVERB
(CH1-4)
R237
B+5
CN27(8P)
CN28(8P)
B+5
FILTER (2/2)
B+15
[-31dBu]
15
B+5
[-11dBu] *5
DIGITAL 6 2
2
BA
I N O UT SUM
EFFECT
7 *5
9 IC603 1
CH1: R136 IC603
CH2: R236
IC602 (8P)
(8P)
B-15 CH3: R336
(16p) Reversed phase
Reversed phase
CH4: R436
SPEAKER [-8dBu]
MONITOR [-8dBu]
EFFECT [-24dBu]
x a o
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E F
8
FILTER (1/2)
VR105
IC103
IC107
LEVEL
(8P) B+15
(8P)
(MASTER) +B15
8
8 5 7
7 2
LIMITER
BA YSP
5 6
Normal phase
Normal
phase
B+15
C933 Reversed phase
B-15
C934
YSProcessing
IC204
IC107 IC204
(8P)
Normal phase
(8P) (8P)
7
5
1
2
BA YSP
LIMITER
3 6
4
4 Normal
phase
B-15
B-15
Reversed phase
CN32(8P)
(fc:80Hz)
CN31(8P)
5
LIMITER B+15
A
Q601
D601 1
D102
14-12
D602 LEVEL
10 4
Meter 5-Point : BA
METER B
+12/+6/0/-6/-20dB
7
8
(0dB:20dBu/MONO IN) D606 IC604
11 IC105 D607
POWER (Over Load: LED flashing)
(8P)
Normal phase B+15
S103
8
3 1
BA
POWERED SP
) L (MONO)
MONITOR
OUT
VR104
JK104
[+4dBu]
5
7
BA
POWERED SP
4
R
Normal phase B-15
IC105
JK204
Q (8P) Q
3 7 6 3
L
[-10dBV]
REC OUT
(-8dBu)
R
JK103
B+15
B+15
POWER
C917
ON/OFF
C918
S1
B-15 B-15
INPUT
AC IN
MONITOR OUT [+4dBu]
u 1 6 3
.
STAGEPAS 300 BLOCK DIAGRAM
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G
2 4
9 9 8
100W/6ohms
x 2
JACK2
POWER
Power Amplifier Unit
CN5(9P)
L
P14
1100(9P)
IC103
Lch
(8P)
L
PA
BA
1 P13
+VB
4 JK105
-VB
A
B-15
AMP MODULE
VBR1
UCD-S200
ERR
(D-AMP)
+VB Rch
-VB AMP MODULE
UCD-S200
B+15 VBR2
(D-AMP)
ERR
8
P15
R
BA
PA
1
R
1100(9P)
B
CN7(9P)
P16
+15V
DRIVE
JK205
Q814-823
ERR LED
+5V
B+5(+5V)
C907
REGULATOR
B+15(+15V) +15V
+15V
B-15(-15V)
-15V
IC801
C909
+15V
REGULATOR
GND (3P)
LED GND REGULATOR
-15V
+5V
IC803
IC805
+5V (3P)
(3P)
D822
D809
+VB
18V
D810
18V
D812 18V
18V
10 9 8 7 6 10 9 8 7 6
1 5 1 5 0 8 9 2 4
1 3 4 5 T1 1 3 4 5
D808
D806
2
SWITCHING
4 1
CIRCUIT
F1 C804
LINE
JP801
3
FILTER C808
*1
*1
JP801:
J,U,C,V:Mount
m
c o
28CA1-STAGEPAS300
H I
STAGEPAS 300
2
9 9
JACK1A NETWORK1
or or
JACK1B NETWORK2 1
Speaker HF
(Lch)
P12(P6)
(Lch)
(TWEETER)
NETWORK P11
+
(P5)
L
P10
(P4)
Speaker LF
JK106 P9
(WOOFER)
(JK206)
(P3) +
JACK1B NETWORK2
or
or
JACK1A
NETWORK1
(Rch)
(Rch)
Speaker HF
P6(P12)
NETWORK (TWEETER)
P5
2
(P11) +
R
P4
Speaker LF
(P10)
(WOOFER)
JK206
P3
(JK106)
(P9) +
FAN
R901
-15V
-15V
-VB
FAN
VDR1
D820
D824
D819
Q806 3
VDR2
10V
Q807
D825
10V
PROTECTION
9 8 2 9 9
T2
4
+40dBu
SPEAKER 100W [+30dBu]
+30dBu
SPEAKER 20W [+23dBu]
+20dBu
+10dBu
5
0dBu
-10dBu
-20dBu
-30dBu
-40dBu
-50dBu
-60dBu
6