Switching power supply pcb. (p816), L820, L831 – Marantz MAR770 User Manual

Page 38: R823, C820, J891, T2a l 250v

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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

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