Pioneer SC-99 Service Manual page 36

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1
Zobel Detection
Over Current Detection of MOS FET in Output Stage
A
S
D AMP ASSY
B
IC4201
!
C
IC4101
IRS20957SPBFS1
!
DRIVER
1
16
VDD
CSH
2
15
CSD
VB
3
14
IN
HO
4
13
VSS
VS
5 NC1
12
NC2
R4129
6 VREF
11
2125
VCC
2.2k
7
10
OCSET
LO
8 DT
9
D
COM
R4132
2125
13k
VSS+12V
R4140
!
3216
27
Q4109
2SC2412K(QRS)
R4109
2125
330
E
DISPLAY
L
ASSY
CN6001
-33
13
UCOM
IC6001
F
36
1
2
V+5V_S
AMPOVERLOAD
S
2/6 - 6/6
Q4104
R6448
D4119
2SC4081(QRS)
R4155
1SS355
R4153
0
100k 1%
47k
GNDP
VD2
R4186
D4117
2125
RF071M2S
150
!
Q4101
IRF6775MPBFS1-TRB
R4137
GATE
DRAIN1
3216
10
3
4
DRAIN2
ACN7165-A
5
SOURCE2
DRAIN3
2
6
SOURCE1
DRAIN4
1
7
!
Q4102
IRF6775MPBFS1-TRB
R4141
GATE
DRAIN1
3216
10
3
4
ACN7165-A
DRAIN2
5
SOURCE2
DRAIN3
2
6
SOURCE1
DRAIN4
1
7
VS2
S
2/6
G
DIGITAL MAIN ASSY
CN7903
CN7902
CN601
-7
-8
DISPLAY BRIDGE
AF
ASSY
2
3
R4043
R4044
1.5k
100
GND
IC4401
!
ATH7090-A
L4100
PWM2
IC4301
!
S
3/6
CN603
CN7952
-32
-17
-17
Y
SC-99
3
4
XOLERR
IC4601
!
IC4701
IC4801
!
!
IC4501
IC4901
!
S
S
S
4/6
5/6
6/6
INTERFACE_M
H
ASSY
CN7953
CN7003
CN7006
-8
-8
-15
CONNECT_M ASSY
4
CN4000
-5
!
XOLERR

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