Switching power supply pcb. (p816), L820, L831 – Marantz MAR770 User Manual
Page 38: R823, C820, J891, T2a l 250v
Q891
Q801
Q810
Q825
R819
C819
D802
R832
Q851
D856
C857
J881
Q871
R823
Q801
C820
Q892
J801
G815
L820
C826
C825
D866
Q861
Q862
D832
C827
Q825
Q810
D804
D803
C803
D829
C802
C810
R810
C804
R804
R803
C829
C801
D806
D807
L832
C813
R808
D814
R801
C809
R815
R814
R807
R883
R884
R885
C882
R881
R886
D871
R887
R891
R892
C892
R893
C867
C891
C876
C864
C852
D851
C862
R861
D861
D862
R865
R864
R863
R862
R851
R852
R853
C854
C859
R894
R866
D868
R805
R806
R802
R809
R811
R812
R813
R825
R826
R827
R828
R882
C811
C814
C851
C856
C866
C871
C877
C881
L825
J828
J821
Q891
D881
C833
C855
C860
C872
L854
L861
C861
L862
L872
L873
R816
C873
L867
L856
U001
U002
U003 U004
U005
U006
U007
U008
U010
U050
U051
U052
U053
U054
U100
U101
U102
U103
U104
U105
U201
U202
D835
D836
L853
L851
C898
J891
C869
C875
C868
J851
J852
C821
J820
S815
C828
U200
R829
F820
+
-
020L
P816
L820
MC44603
L831
WA386K106-0
FR
-34V
5V
5V
GND
GND
-8V
12V
GND
L831
FR
GND
T2A L 250V
Q861 Q862
Q871
Q892
Q851
P816
39
40
R832
R823
C825
C828
C826
C859
L852
L854
D836
R886
R884
R885
C866
C871
C861
C851
R819
D835
R803
R826
C827
C898
J891
G815
C821
C881
C875
C869
L853
L851
C860
R851
R852
R853
C855
R810
C873
L872
D829
D832
D814
R808
R801
C801
C802
Q891
C877
L873
L871
L866
D871
D866
D861
D856
D851
D804
D803
R894
C892
Q892
R893
C891
R892
R891
C876
J828
D862
Q871
R887
D881
C882
R883
R882
R881
C872
R866
L867
C868
C867
C864
C862
C857
C854
C852
C856
R814
R815
C820
C819
F820
S815
J851
R828
Q851
L831
Q801
D868
L862
R865
R864
R863
R862
Q862
Q861
R861
L861
L856
R802
C803
C804
R804
R805
R806
R807
C809
R809
C810
C814
R816
C813
R813
R812
C811
L832
R827
R825
L825
Q825
D807
D806
C833
R811
R829
C829
D802
L820
J801
J821
J820
1W
18k
1W
18k
/400V
470pF
/400V
470pF
/400V
470pF
(OPTION)
10
µH
1%
2.21k
1%
681
0.1
0.1
0.1
1M(CB)
(UL/CSA,MITI)
330k
4.7k
1
/1kV
470pF
0.1
0.01
/400V
120
/25V
100
/16V
100
/16V
220
4.7
µH
4.7
µH
0.1
560
220
10
0.1
10k
/16V
220
10
µH
24V
AG01
AG01
18k
82k
NP0
82pF
820pF
2SC2878
0.1
10
AG01
RU4YX
AG01
RK46
AG01
1k
100/25
PC123F
10k
100/25
22k
22k
7908
100
TL431
0.022
1.8k
100
3.3k
/16V
220
1k
2.2
µH
/16V
1000
220/50V
10/50V
/10V
2200
100/6.3V
/16V
330
1.8k
1.8k
250V
0.22
250V
0.1
1.5
LM317
PC123F
10
µH
10k
10k
10k
1k
2SA
2SC
10k
1
µH
6.8
µH
22k
470p
4700pF
15k
15k
1k
180k
1500p
330
2.2/50V
0.1
180
2200pF
15
100
0.1
10
1.5
1k
2SK2943
100/25V
22
10k
4.7/50V
S1WB
2A_125V(F&U)
2A_250V(N&K)
-34V
+4.1V
14
13
12
11
10
9
8
7
6
5
4
1
+12V
+12V
16
8
9
10
15
12
14
13
5
7
11
6
4
3
2
1
-8V
+12V
GND
GND
GND
+5V
+5V
GND
SWITCHING POWER SUPPLY PCB. (P816)
Q810
L831
UVL01
MC44603P
DETECT
DEMAGINETIZATION
MANAGEMENT
DEMAGNETISATION
OSCILLATOR
STANDBY
(REDUCED FREQUENCY)
IREF
VREF
BLOCK
REFERENCE
BLOCK
INITIZLIZATION
SUUPLY
IREF
UVL01
Q
LATCH
SHUTDOWN
THERMAL
VOC
VREF
BUFFER
PROTECT
VOLTAGE
OVER
MANAGEMENT
VOLTAGE
OVER
CURRENT
SENSEINPUT
&DMAX
SOFTSTART
CONTROL
SOFT-START
DMAX&
=1
FOLDBACK
INPUT
FOLDBACK
E/A OUT
FEEDBACK
2.5V
OUT
VSB
VREF
VOLTAGE
STANDBY
RP
STANDBY
RF
SYNC
IREF
AMP
ERROR