Yamaha P1000S Service Manual page 67

H G
Q Q
P2500S/P3500S BLOCK DIAGRAM
3 7 6 3 1 5 1 5 0
1
IN
JK301
1
2
CHANNEL A 3 IC301a (8P)
IC304,305 (8P)
(BRIDGE)
+15V
+15V
(PARALLEL) JK303
2 8
- 1 State variable
BA
Active filter
+
3
4
-15V
2
+15V
INPUT 5
IC302b (8P)
6
-15V
+15V
JK302
1
2
IC303a
2
(8P)
3
3
CHANNEL B
IC301b
+15V
(8P)
JK304
3
6
7
- State variable
BA
Active filter
+
T E 5
4
L 1 3 9 4 2 2 9 6 5 1 3 4
-15V
-15V
BL
W301A
POWER SW
*2)
*2) *2)
4
*2)
SW601 F402 CN407
W602 W402
GY
*1)
*2)
C407 -24
SW601
W401
W601
F401 CN406
GY
*1)
ON/ OFF J403,
PK
404
W603 W403
SUB
(PSW)
K401
CN408
5
CN404
L
AC IN J401,
w w w
402
N
CN405
*1) P3500S H,B,W,K
P3500S J,U,V,T,A
P2500S J
P2500S U,V,T,H,B,W,K,A (J403,404: installed
28CA1-8826831
*2) P3500S only
4
6
F
CHANNEL A
LOW CUT
8
ATT
SW303-1 CN302
SUB WOOER
OFF
V R 3 0 1
VR601
FREQUENCY A
CN602
SW301-2
PARALLEL
BRIDGE
OFF
8
STEREO
7
YSP SW302-3
SUB
ON
4
LOW CUT
SW303
(VR)
OFF -2
SUB
SW302 WOOER
-4
OFF
ON
+15V
CHANNEL B
OFF
LOW
SW304-2
8
ATT
CUT
1
SUB
YSP
ON WOOER
VR602
SW302-1
OFF
IC306,307 (8P)
LOW CUT
8
SUB CN302
CN602
WOOER
OFF
SW304-1
V R 3 0 2
FREQUENCY B
*2)
*2)
CN413
F403
D405-407,410
+24
IC401
+15V
+
F404
-
+ +
- -
-15V
BL
D408 -24
IC402
-V
CN409
OR
+B
D401
CN410
VI
+
C437
OR CN411
C441 -
Trans-
+
C438
CN419
-
former C442
CN418
-B
x a o
. i
(R511,J403,404: not installed RY401: installed)
(R511,RY401: not installed J403,404: installed)
(J403,404: not installed RY401,R511: installed)
RY401,R511: not installed)
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E D
DC
IC403 (8P)
Q416,418,
419,422, +15V
CN417 424
CN301
Limiter
INV
+15V
-15V
8
1
2
4
+15V
-15V
IC302a (8P)
+15V
IC404 (8P)
Q417,420,
421,423,
+15V
SW301-1 425
PARALLEL
Limiter
BRIDGE
STEREO
-15V
Q Q
3 7
Q401,402,
Q413
-V
PROTECTION
Q411,412
Q414,415
THERMAL
-24
+24
FAN DRIVE
CN416 CN415
10P
2P
10P
CN601
TEMP
+15V
PROTECTION
POWER
CLIP
YSP
-15V Ach
SIGNAL
+B
W401
W402
W403 -B
CN412
u 1 6 3
y
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C B
2 4
8 9 9
PA
ACH POWER AMP
+B
+B
CN414 CN101
CN105
OR
PRE
-B
-B
Q434
Q426
NF
BCH POWER AMP
NF
Q435
Q427
+B
+B
CN106
YE
PRE
-B -B
6 3 1 5 1 5 0 8 9
405-407
+24
BL
HEAT SINK
+24
PR101
DETECT
+B GND -B
PR102
Q403,404
Q408-410
FAN
SUB
CLIP
Bch (LED)
SIGNAL
m
c o
.
A
2
P2500S/P3500S 8 9 9
SUB
(OUT2)
W604
SPEAKERS
SP601
CHANNEL A
A+B BRIDGE
CHANNEL B
W606
BL
2 4 9 8 2 9 9
W301B
W605
W607
4P
SPEAKERS
4P
1+
1- 2-
2+
CHANNEL A / B
1+
1-
2-
2+
CHANNEL B
SUB
(OUT1)