Pioneer SC-LX81 - Page 67

67
SC-LX81
5
6 7 8
5
6 7 8
A
B
C
D
E
F
Low Voltage Detection for Amplifier Power Supply
CN4000
-8
INTERFACE
ASSY
F
ICEPOWER AMP ASSY
Q
UCOM
IC2001
17
D-MOTHER
ASSY
B
CN7051
-10
CN7005
-10
CN2005
-10
AMP_
OVERLOAD
AMP_OLAMP_OL
C4214
ACG7068-A-T
C4114
680p
ACG7068-A-T
C4122
ACG7073-A
2125
2200p
C4156
0.1u/16
C4259
NM
C4159
NM
C4115 1u/10
GND
GND
Q4108
2SD2704K
Q4208
2SD2704K
R4173
100k
R4127
1.5k
1%
R4112
22k
R4111
220k
R4211
220k
R4212 22k
R4125
1k
1%
R4126
1.5k
1%
R4124
27k
1%
R4213
NM1%
R4113
NM1%
AMPOVERLOAD
AMPOVERLOAD
VS_CHK1
VD_CHK1
R4278
NM
R4178
NM
C4116
1u/16
C4216
1u/16
ICC1-AVR
IC4200
Vd_check
1
Vs_check
2
Discharge
3
OC_mon
4
Enable
5
Thermal
6
In_A_Ch2
7
Out_A_Ch2
8
In_B_Ch2
9
Out_B_Ch2
10
In_C_Ch2
11
Pwm-_ch2
12
Pwm+_ch2
13
Mod_Ch2
14
ZobelSense2
15
Average2
16
Average1
17
NTC_in
18
ZobelSense1
19Mod_ch1
20
Pwm-_ch1
21
Pwm+_ch1
22
In_C_Ch1
23
Out_B_Ch1
24
In_B_Ch1
25
Out_A_Ch1
26
In_A_Ch1
27
NC
28
Vdd
29
UVP_en
30
Main_Gnd
31
Vss
32
Ref_ch1
33
CS1_ch1
34
CS2_ch1
35
RECout_ch1
36
Vin__ch1
37
DC_FB_ch1
38
Vin_ch2
39
DC_FB_ch2
40
RECout_ch2
41
CS1_ch2
42
CS2_ch2
43
Ref_ch2
44
ACH1479-A
C4213
100u
ACH1479-A
C4112 100u
ACH1479-A
C4212 100u
ACH1479-A
C4113
100u
MODULATOR
 Output of Logic Circuit becomes “L”. AMPDISABLE of modulator IC
becomes “L” when abnormal.
Disable Signal from micro-computer.
Normally “H”.
R4002
100
R4003
100
R4001
100
R40088.2k
R4007 8.2k
R4006 8.2k
R4005 8.2k
R4004
100
IC4003
21
IC4003
43
IC4003
TC74VHC04FTS1
89
IC4003
1011
IC4004
3
1
2
14
7
IC4004
6
4
5
14
7
IC4004
8
9
10
14
7
IC4004
TC74VHC08FTS1
11
12
13
14
7
R4013
100
R4014
100
R4015
100
R4016
100
GN D
C4006
0.1u/16
R4018
0
V+5V
GND
R4080
3.3k
R4081
3.3k
R4082
3.3k
R4083
3.3k
R4084
12k
R4085
12k
R4086
12k
R4087
12k
C4031
0.1u/16
C4032
0.1u/16
C4033
0.1u/16
C4034
0.1u/16
GND
GND
GND
GND
D4007 1SS352
D4008 1SS352
D4009 1SS352
D4010 1SS352
D4011
1SS352
D4012
1SS352
D4013
1SS352
D4014
1SS352
GN D
C4035
0.1u/16
Q4015
2SC4154(EFG)
R4088
12k
R4089
12k
R4091
47k
IC4400
5
SR ch
SL ch
FR ch
FL ch
IC4600
5
SBR ch
SBL ch
IC4700
5
C ch
GND
R4043R4044
100
100
R4045
10k
C4021
1000p
CH