Sc-27 - Pioneer SC-27 Service Manual

5
D4403
RF051VA2S
RF051VA2S
IC4401
ICC3-AVR
2/5,4/5,5/5
DRIVER
1
Isense1_H
Vboot
2
Isense2_H
HighDrive
3
NC1
HighReturn
4
NC2
Isense1_L
5
PWM+
Isense2_L
6
PWM-
Vdrive
7 SS_EN
LowDrive
8
Blanking
R4447
ACN7165-A
3216
L4404
ATL7020-A
VSS+10V
D4303
RF051VA2S
RF051VA2S
IC4301
ICC3-AVR
DRIVER
1
Isense1_H
Vboot
2
Isense2_H
HighDrive
3
NC1
HighReturn
4
NC2
(SL)
Isense1_L
5 PWM+
Isense2_L
6 PWM-
Vdrive
7 SS_EN
LowDrive
8 Blanking
R4347
ACN7165-A
3216
L4304
ATL7020-A
VSS+10V
VD3
5,5/5
SC1
V+5V
R4475
Q4410
R4466 R4467
2SA1514K(RS) 10
R4470
10K 1% 1k 1%
1k
VD4
GND GND
Q4310
R4366 R4367
2SA1514K(RS)
R4370
0K 1% 1k 1%
1k
GND
GND
5
6
MOS FET Driver
VD3
R4445
10k
2125
1%
Q4402
2SC5738 !
D4407
D 2
R4448
3216
ACN7165-A
G
D4401
!
1
S 3
RB161VA-20
16
15
Q4403
2SA2061
PWM3
14
D4405 R4450
13
2125
D4406 10k
12
1%
RF051VA2S
11 RF051VA2S
10
Q4404
2SC5738 !
9
VS
R4449
D 2
3216
ACN7165-A
G
D4402
1
S 3
RB161VA-20
4.7u
Q4405
2SA2061
VS3
VD4
R4345
10k
2125
1%
Q4302
2SC5738 !
D4307
R4348
1/4W D 2
3216
ACN7165-A
G
D4301
! 1
S 3
RB161VA-20
16
15
Q4303
2SA2061
PWM4
14
D4305 R4350
13
2125
D4306 10k
12
RF051VA2S
1%
11 RF051VA2S
(SL)
10
Q4304
2SC5738 !
9
VS
R4349
D 2
1/4W
3216
ACN7165-A
G
D4302
1
S 3
RB161VA-20
4.7u
Q4305
2SA2061
VS4
IC4404
Q4411
NJM12904V
2SA1602A(EF)
2
8 GND
1
TEMP_OUT
4
3
Q 1/5,2/5,4/5,5/5
GND
IC4404
NJM12904V Q4311
2SA1602A(EF)
6
GND
7
5
6
Q
Output Power Stage and LP Filter
V+64V
GND VD
L4400
ATL7017-A
15u
VS
V-64V
R4455
GND
ZOBEL3
2125
1%
15k
V+12RY
GND GND
Q 1/5
Q4312
RYS
RT1N140M
V-12RY
V+64V
VD
GND
(SL)
L4300
ATL7017-A
15u
VS
V-64V
R4355
GND
ZOBEL4
2125
1%
15k
GND
GND
NOTE
1. RESISTORS
Unit: k-kΩ, M-MΩ or Ω unless otherwise noted.
Rated Power: 1/16W or NETWORKS-1/32W unless otherwise noted.
Toleranee: (J) ±5% unless otherwise noted.
2. CAPACITORS
Unit: p-pF or u-uF unless otherwise noted.
Ratings: Capacity(F)/Voltage(V) unless otherwise noted.
YB:CKSRYB, QYB:CKSQYB, SYB:CKSYB, CH:CCSRCH,
HAT:CEHAT, ZL:CEHAZL
3. NM: No Mount
: Audio Signal Route

SC-27

7
3/5 ICEPOWER AMP ASSY
(AWH7022: SC-27)
(AWH7019: SC-25, SC-9540)
GND
L4401
ATL7022-A
4 3 3
4
12u
1 2 2
1
GND
GND
GND
SPEAKER TERMINAL(4P)
JA4301
AWH7019 AKE7141-A
AWH7022 AKE7149-B
RY4300
ASR7001-A
GND
L4301
ATL7022-A
4 3 3
4
(SL)
12u
1 2 2
1
GND
GND
GND
7
8
A
B
KN4200
GND1 GND3
1 3
2 4
GND2 GND4
VNE1948-A
GND
C
*JA4301
AKE7141-A
1
SR+
2
5 SR-
(SL)
3
SL+
4
SL-
D
GND
E
F
Q
3/5
141
8