Icepower Amp (1/5) - Pioneer SC-LX81 Service Manual

1

10.21 ICEPOWER AMP (1/5)

A
5 6
IC4003
GND
V+5V
14
IC4003
13
12
7
GND
R4001
B
R4002
R4003
R4004
R4028
100
R4029
100
C
CN4000
R4036
CKS3382-A
100
Disable1 1
Disable2 2
Disable3 3
Disable4 4
R4043
AMUTE 5
100
SBMUTE 6
AMPTX1 7
AMP_Overload
8
R4046
RYA 9
R4047
RYC 10
R4048
RYS 11
R4049
RYB 12
Max_Temp 13
Thermal_Overload 14
DC_DETECT 15
GND 16
D
GND 17
GND1
GND
R4024
100
R4025
100
R4026
100
E
F
Q 1/5
134
1
2
D4007 1SS352
R4080 R4084
9 8
3.3k 12k R4013
100
IC4003
TC74VHC04FTS1
GND
D4008 1SS352
R4081 R4085
11 10
3.3k 12k
IC4003
D4009 1SS352
GND
R4082 R4086
3.3k 12k
D4010 1SS352
GND
R4083 R4087
3.3k 12k
100
GND
R4005 8.2k
100
R4006 8.2k
100
R4007 8.2k
100
R4008 8.2k
GND
R4030
100
R4031
100
V+5V
GND
R4037
GND
100 V-5V
V+5V
GND GND
Q 2/5, 3/5, 4/5, 5/5
R4044
AMPOVERLOAD
100
GND
100 R4050 100
100 R4051 100
R4052 100
100
R4053
100 100
DCdetRY
GND
R4021
100
IC4005
HA17431GLTPA
R4022
100
R4023
100
GND
Q 2/5, 3/5,
4/5, 5/5
TEMP_OUT
GND
HN1C01FU(YGR)
1
E1
2
B1
3
C2
HN1C01FU(YGR)
1
E1
2
B1
3
C2
2
3
V+5V
IC4004
TC74VHC08FTS1
14
12
D4011 R4088
11
1SS352 12k
13 7
IC4004
GND
14
9
D4012
8
R4014
1SS352
10 7
100
IC4004
14
4
D4013
6
1 2
R4015
1SS352
5
7
100
IC4003
IC4004
14
1
D4014
3
3 4
R4016
1SS352
2
7
100
IC4003
Q 2/5
AMPDISABLE1
Q 3/5
AMPDISABLE2
AMPDISABLE3
AMPDISABLE4
Q 4/5
Q 5/5
IC4006
IC4006
(1/2)
1
7
2
TC7WH08FU
AM CONTROL
CIRCUIT
OSC1
Q 2/5, 3/5,
4/5, 5/5
Q 4/5 Q 3/5
RYS
Q4008
RYB
RT1P241M
Q4010
RT1P241M Q4007
RT1N140M
Q4009 DCdetRY
RT1N140M
Q4011 DCdetRY
RT1N140M
GND
Q 2/5
GND
GND
D4001 1SS352 R4009 220
AMPDISABLE1
R4010
D4002 1SS352 220
AMPDISABLE2
R4011
D4003 1SS352 220
AMPDISABLE3
R4012
220
D4004 1SS352
AMPDISABLE4
V+5V
R4094
2.2k
R4054
3.3k
2
IC4000
BU7262SFVM
5 3
(2/2)
4
V+5V 7
8
6
R4097
0
GND GND
GND
GND GND
Q4014
6
C1
5
DC_DETECT1
B2
4
Q 2/5, 3/5,
E2
4/5
GND
Q4016
6
C1
5
DC_DETECT2
B2
4
Q 2/5, 3/5,
E2
4/5, 5/5
GND
SC-LX81
3
4
Q 2/5, 3/5, 4/5, 5/5
AMPOVERLOAD
R4089
Q4015
12k
2SC4154(EFG)
GND
GND
V+5V
(2/2)
8
5
3
TC7WH08FU
6
4
GND
Q 2/5
Q 5/5
RYA
Q4004
RYC
RT1P241M
Q4006
RT1P241M
Q4005
RT1N140M
DCdetRY
GND
Q 3/5
Q 4/5
Q 5/5
OVER HEAT
DETECT CIRCUIT
V+5V
R4058
68k
8
D4005
1
V+5V
1SS352
4
IC4000 (1/2)
BU7262SFVM
IC4001 (1/2)
GND
BU7262SFVM
2
8
1
R4062
4
R4064
3
3.3k
47k
GND GND
V+5V
V+5V
V+5V
D4006
NM
IC4001 (2/2)
BU7262SFVM
GND GND
6
8
DC DETECT
7
R4069
CIRCUIT
4
5
47k
R4070
750k
GND
4
DCdetRY
GND