Marantz CDR500 F1B Service Manual page 38

SWITCHING POWER SUPPLY PCB. (P816)
C819
0.1
R819
G815 C820 250V
330k
0.01 0.22
J801
250V (UL/CSA,MITI)
1M(CB)
F820
L820
S815 J820 J821
J828
R810
R801 Q810
10k 16
82k
MC44603P
C801 VREF IREF
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
D802
S1WB
D806
C825
470pF
/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&
1.8k
UVL01
SOFT-START
R815
CONTROL
1.8k
VREF R816
180
C814
SOFTSTART
0.1
&DMAX
11
C810
2.2/50V
P816
Q829
Q892
R894
L852
C855
1-39
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
1 µ H AG01
9
C861
D866
RU4YX
L866
C866
8
0.1
D871
AG01
7
L871
C871
C872
0.1
220
/16V
R883
C882
Q801
1.8k
0.022
PC123F
R887 D881
100 TL431
R884
2.21k
1%
D835
R885
OPTION
681
1%
R886
D814
AG01
+12V
Q891
R892
2SC2878 R893
22k
10k
R891 C891
22k 100/25
Q819
Q815 L831
Q817 Q862 Q861
L854
L853
R853
R852
C851 D856
Q851
L856
C862
C859
U816
R861 D861
C864 R862 Q861
D866
C866
D871 R886
C867
R885
L866
Q862
C871
L872 R881
Q891 R883
C882
D881
R887
U817
C881
J881
C869
Q871 C875
C891
C876
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 1k
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 2SA 10k
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
C875
L872
0.1
10uH 100 -12V/-8V
/16V
SELECT
C873 R881 R882
220 3.3k 100
JUMPER
/16V
L873
10uH U811
-12V
C876
220/16V
C881
100
/25V
C898
0.1
Q825
Q801 Q810
+
C821
D802
+
+
C828
Q825
C827
U820
C829
U819
R825
R829
R811
L832
C811
R801
C801 C802
R827
R809
C833 C809
R815 C810
D814
C803
R814
D832
C814
R804
R816
R884
R808
R807
U806
C813
D836 C804
R802
R813
R806
D835
R812
U807
R810
Q801 P816
WG388K104-0
1-40
J851
-34V
GND
+5V
+5V
GND
GND
GND
+12V
-8V
J852
GND
+12V
GND
+5V
GND
-12V
(-8V)
J891
L820
C820
R803
R805