Pioneer SC-LX85 Service Manual page 160
Audio/video multi-channel receiver
Hide thumbs
Also See for SC-LX85:
- Operating instructions manual (122 pages) ,
- Service manual (9 pages) ,
- Quick start manual (104 pages)
Table of Contents
Advertisement
5
Output = No Signal
x. 2Vpp
MOS FET Driver
6/6
RF051VA2S
IC4201
R4237
B
IRS20957SPBF
3216
!
9.1
DRIVER
B
ACN7194-A
1
16
SOURCE2
VDD
CSH
2
15
SOURCE1
CSD
VB
3
14
IN
HO
4
13
VSS
VS
5
12
NC1
NC2
R4229
6
11
VREF
VCC
2125
1.8k
R4241
7
10
OCSET
LO
3216
9.1
8
9
ACN7194-A
DT
COM
SOURCE2
R4232
SOURCE1
2125
5.6k
47
M
R4246
40
1M
65-A
4.7u
M
R4209
10k
+10V
RF051VA2S
IC4101
R4137
B
IRS20957SPBF
3216
!
9.1
DRIVER
B
ACN7194-A
1
16
SOURCE2
VDD
CSH
2
15
SOURCE1
CSD
VB
3
14
IN
HO
4
13
VSS
VS
5
12
-52V
NC1
NC2
R4129
6
11
VREF
VCC
2125
1.8k
R4141
7
10
OCSET
LO
3216
9.1
8
9
ACN7194-A
DT
COM
SOURCE2
R4132
SOURCE1
2125
5.6k
-64V
1M
40
*R4146
65-A
1M
4.7u
M
R4109
10k
6/6
3
450 KHz is Modulated by the Signal
IZE
RS1/8S***
RS1/4SA***
/4W
CCS***
3216
CKS***
5
6
2
VD1
D4217
!
Q4201
IRF6775MPBF-TRB
GATE
DRAIN1
3
4
DRAIN2
5
DRAIN3
2
6
DRAIN4
1
7
PWM1
!
Q4202
ATH7090-A
IRF6775MPBF-TRB
GATE
DRAIN1
L4200
3
4
DRAIN2
5
DRAIN3
2
6
DRAIN4
1
7
VS1
VD2
+64V
D4117
!
Q4101
IRF6775MPBF-TRB
GATE
DRAIN1
3
4
DRAIN2
5
DRAIN3
2
6
DRAIN4
1
7
PWM2
3
!
Q4102
IRF6775MPBF-TRB
GATE
DRAIN1
3
4
DRAIN2
ATH7090-A
5
DRAIN3
2
6
L4100
DRAIN4
1
7
4
VS2
Approx.
450KHz
Approx. 126Vpp
6
7
R
2/6
Approx. 450KHz
Approx. 2V Offset
GND
Output Power Stage and LP Filter
R
1/6
V+64V
VD
VS
V-64V
GNDS
C4263
C4255
Q4204
NM
0.01u/50
LSC4081UB(QRS)
AMPOVERLOAD
R4253
D4219
R4255
47k 1%
1SS352
22k
V+12RY
ASR7001-A
GNDS
R
1/6
Q4112
RYA
RT1N140M
R
1/6
V-12RY
V+64V
VD
VS
V-64V
GNDS
C4163
NM
C4155
Q4104
LSC4081UB(QRS)
0.01u/50
R4155
R4153
D4119
47k 1%
R
1SS352
22k
GNDS
4
1KHz
Leakage Component of Carrier is Superimposed
on the Signal Output and Looks Thickly
SC-57
7
IR POWER AMP ASSY (2/6)
(SC-57
: AWH7030)
(SC-55/SC-1526-K : AWH7039)
KN4100
1
GND1
2
GND2
VNE1948-A
GNDP
GNDP
R
1/6, 3/6 - 6/6
RY4100
R
C+
5/6
C_GND
GNDP
GNDP
AMPOVERLOAD
1/6, 3/6 - 6/6
Signal confirmation point
#
# : Waveform namber
Power supply confirmation point
###
# : Measured voltage
Approx.450KHz
Leakage Component at No-Load
is Approx. 0.6 ~0.8 V (rms)
8
A
B
3
GND3
4
GND4
C
*JA4101
AKE7150-B
1
R+
2
R-
3
7
L+
4
L-
5
C+
6
C-
SPEAKER TERMINAL(6P)
D
E
F
R
2/6
151
8
Hide quick links:
Advertisement
Table of Contents
