Marantz CDR631 Service Manual page 34

SWITCHING POWER SUPPLY P816
R819
G815 C820
330k
0.01 0.22
J801
(UL/CSA,MITI)
250V
1M(CB)
F802
L820
S815 J820
J821
J828
R810
Q810
R801
10k 16
82k
MC44603P
VREF IREF
C801
82pF DEMAGINETIZATION
NP0
DETECT
8 DEMAGNETISATION REFERENCE
MANAGEMENT BLOCK
9
SYNC IREF
C802
820pF
OSCILLATOR
10
R802
RF
22k 15
STANDBY
R803
RP
4.7k 12 STANDBY
STANDBY
(REDUCED FREQUENCY)
C803
470p VSB
2.5V
OUT
14
ERROR
AMP
R805 R804 C804
VOLTAGE
15k 15k 4700pF
FEEDBACK
E/A OUT
13
FOLDBACK
FOLDBACK CURRENT
INPUT SENSEINPUT
5 7
R806 R808 R807 R809
C809
1k 18k 180k 330
1500p
35
D802
S1WB
D806
C819 C825
0.1 470pF
250V
/400V
C826
470pF D807
/400V C821
120
D803
/400V
D804
C828
470pF
R823
/400V
18k
1/2W
R832
18k
R829 D832
1/2W
10k AG01
1
SUUPLY UVL01
INITIZLIZATION BLOCK
R812
2
100
LATCH
R813
3
15
BUFFER
=1
Q
4
C813
2200pF
THERMAL VREF VOC
SHUTDOWN
R835
OVER OPTION
OVER
6
VOLTAGE
VOLTAGE
IREF
PROTECT
MANAGEMENT
R814
DMAX&
UVL01 1.8k
SOFT-START
R815
CONTROL
1.8k
VREF R816
180
C814
SOFTSTART
0.1
&DMAX
11
C810
2.2/50V
L831
L831
1
D851
AG01
L825
4
C827
Q825
14
470pF C851
2SK2943
/1kV 0.1
C852
330
/16V
R825 13
1k
R826 R827 R828
12
1 1.5 1.5
C857
D856 C856
2200
RK46
/10V
11
5
L832
10 µ H
10
D861
L861
6
AG01
1 µ H
9
C861
D866
RU4YX
L866
C866
8
0.1
D871
AG01
7
L871
C871
0.1 C872
220
/16V
R883
C882
Q801
1.8k
0.022
PC123F
R887 D881
100 TL431
R884
D835
2.21k
OPTION
1%
R885
681
1%
D814
AG01
R886
+12V
R892
22k R893
10k
Q891 R891
2SC2878 22k
C891
100/25
Q851
LM317
L854
10 µ H
L853
4.7 µ H
Q892
C892
R853 PC123F
100/25
10
R852 C855
C854
220 0.1
100/6.3V
R851 R894
L851
560
4.7 µ H
L852
L856
6.8 µ H C860 C859
0.1 100/10V
R861
10k
L862
10 µ H
R862
C864
1k
D862
Q861 220/50V
2SC
R863
Q862
C862 10k
2SA
R865
10/50V
10k
+12V
R864
C869
10k
L867
220
2.2 µ H D868
/16V
R866
C867 Q871
1k
1000 C868 7908
/16V
U810
(-8V)
C877
L872 C875
0.1
10uH 100 -12V/-8V
/16V
SELECT
C873 R881 R882
220 3.3k 100
JUMPER
/16V
L873
10 µ H U811
-12V
C876
220/16V
C881
100
/25V
C898
0.1
36
1k
J851
-34V
GND
+5V
+5V
GND
GND
GND
+12V
-8V
J852
GND
+12V
GND
+5V
GND
-12V
(-8V)
J891