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A
B
C
D
E
F
G
H
1
2
3
4
5
6
4
P2500S/P3500S BLOCK DIAGRAM
P2500S/P3500S
28CA1-8826831
1
IC302a (8P)
C420
D405-407,410
+
+
-
-
+
-
+
-
-24
-15V
8
+15V
4
-15V
Active filter
VR602
CN602
IC302b (8P)
CN106
IC404 (8P)
PR102
FAN DRIVE
PR101
THERMAL
DETECT
PROTECTION
HEAT SINK
+
-
-V
-V
8
5
6
YSP
OFF
+15V
OFF
SUB
WOOFER
LOW CUT
SW303
-2
4
-15V
7
IC303a
(8P)
F402
-24
*3)
4
OFF
LOW
CUT
SW304-2
SUB
WOOFER
IN
SUB
(VR)
DC
PA
JK301
JK303
JK302
JK304
IC301a (8P)
8
3
2
1
+15V
4
8
2
1
+15V
SW301-2
SW302-3
SW302-4
VR601
CN602
CN105
W604
IC403 (8P)
CN302
SW301
SUB
(OUT2)
TEMP
SP601
SUB
(PSW)
W603
W601
CN404
F401
ON/ OFF
SW601
AC IN
W606
W605
CN405
L
N
CN403
CN401
C410
C405
C411
K401
CN406
CN408
CN419
CN418
D401
C437
C441
C438
C442
W401
W402
W403
CN412
+B
-B
CN409
CN410
CN411
CN413
3P
F403
BL
OR
OR
VI
VI
(PK)
GY
F404
+24
+15V
IC401
+15V
-15V
2
1
3
-
+
2
1
3
SUB WOOFER
State variable
IC304,305 (8P)
7P
7P
CN302
PARALLEL
BRIDGE
STEREO
-15V
PARALLEL
BRIDGE
STEREO
CN301
8P
8P
PROTECTION
POWER
CLIP
SIGNAL
CN101
CN414
2P
CN415
Q434
Q426
Q416,418,
419,422,
424
CLIP
SIGNAL
+B
-B
W301B
W301A
+B
-B
GND
NF
NF
SUB
(LED)
TM
PO
PR
ASIG,BSIG
ACLP,BCLP
Ach
Bch
10P
10P
CN416
CN601
CN102
CN103
CN104
RE
BL
WH
OR
YE
BL
BL
BL
PRE
PRE
Q435
Q427
Q417,420,
421,423,
425
CN417
Q403,404
Q408-410
Q411,412
Q414,415
Q401,402,
405-407
Q413
+B
-B
+B
-B
+15V
-15V
-15V
+15V
-B
+B
-B
+B
+24
+15V
+15V
CHANNEL A
(BRIDGE)
(PARALLEL)
CHANNEL B
INPUT
CHANNEL B
CHANNEL A
ATT
ATT
BA
INV
Limiter
Limiter
ACH POWER AMP
15P
15P
BCH POWER AMP
SPEAKERS
CHANNEL A
CHANNEL B
A+B BRIDGE
FAN
POWER SW
D408
+24
+24
-24
FREQUENCY A
LOW CUT
ON
OFF
SW303-1
8
+15V
4
-15V
Active filter
8
2
3
YSP
OFF
+15V
IC301b
(8P)
5
6
7
SW302-1
-
+
State variable
IC306,307 (8P)
BA
FREQUENCY B
LOW CUT
SW304-1
SUB
WOOFER
W607
4P
1+
1-
4P
2+
2-
1+
2+
2-
1-
SUB
(OUT1)
SPEAKERS
CHANNEL B
CHANNEL A / B
ON
ON
OFF
OFF
+15V
YSP
YSP
1
SW601
W602
C407
CN407
GY
J403,
404
R511
*1)
*1)
RY401
*2)
*2)
*2)
*2)
*2)
CN402
*2)
*1)
P3500S H,B,W,K
P3500S J,U,V,T,A
(R511,J403,404: not installed
(R511,RY401: not installed
RY401: installed)
J403,404: installed)
P2500S J
(J403,404: not installed
P2500S U,V,T,H,B,W,K,A
(J403,404: installed
RY401,R511: installed)
RY401,R511: not installed)
*2)
P3500S only
J401,
402
*2)
Transformer
*3)
W702
W701
L701
COIL-L
BL
RE
COIL-L
J401
J402
J
except J
: installed
: not installed
VR301
-15V
VR302