Marantz DR-6000 Power Supply Unit P816, Description of P816, Description of controller MC44603

Page 22

8.2Power Supply Unit P816

8.2.1Description of P816

MOSFET Q825 is used as a power switch controlled by the controller Q810. When the switch is closed, energy is transferred from mains to the transformer. This energy is supplied to the load when the switch is opened. Through control of the switch-on time, the energy transferred in each

cycle is regulated so that the output voltages are independent of load or input voltage variations. The controlling device MC44603 is an integrated pulse width modulator. A clock signal initiates power pulses at a fixed frequency. The termination of each output pulse occurs when a feedback signal of the inductor current reaches a threshold set by the error signal. In this way the error signal actually controls the peak inductor current on cycle-by-cycle basis.

SWITCHING POWER SUPPLY PCB. (P801)

L831

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D802

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S1WB

 

 

 

 

D806

 

 

L825

4

 

 

 

 

 

 

 

 

 

 

C819

C825

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G815

 

 

C820

R819

 

 

 

0.1

470pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

250V

/400V

 

 

 

 

 

 

 

 

 

Q825

 

C827

J801

0.01

 

 

0.22

330k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

250V

(UL/CSA,MITI)

 

 

 

C826

 

 

 

 

 

 

 

 

 

2SK2943

470pF

 

 

 

 

 

1M(CB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

/1kV

 

 

 

F820

 

 

 

 

 

 

 

470pF

 

 

 

 

C821

 

D807

 

 

 

 

 

 

 

 

 

 

 

 

 

L820

 

/400V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D803

 

 

120

 

 

 

R825

 

 

 

S815

J820

J821

 

 

 

 

 

 

 

 

 

 

 

/400V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1k

 

 

 

 

2A_125V(F&U )

 

 

 

 

 

 

 

 

 

 

D804

 

 

 

 

 

 

 

 

 

 

 

2A_250V(N&K)

 

 

 

 

 

 

 

C828

 

 

 

 

 

 

 

 

 

R826

R827

R828

 

 

 

 

 

 

 

 

 

 

 

470pF

 

R823

 

 

 

 

 

 

 

J828

 

 

 

 

 

 

 

 

 

 

/400V

 

 

 

 

 

 

 

 

1

1.5

1.5

 

 

 

 

 

 

 

 

 

 

 

18k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R832

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18k

R829

 

 

 

 

D832

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1W

10k

 

 

 

 

 

AG01

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L832

 

 

 

 

 

 

 

 

 

 

 

C829

4.7/50V

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

D829 24V

 

 

 

C833

100/25V

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

R811

22

 

 

 

 

 

 

 

 

R801

Q810

 

 

R810

16

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

10k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

82k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C801

 

MC44603P

 

 

 

VREF IREF

 

 

 

 

 

 

 

C811 0.1

 

 

 

 

 

 

 

82pF

 

DEMAGINETIZATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NP0

8

DETECT

DEMAGNETISATION

REFERENCE

SUUPLY

UVL01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MANAGEMENT

 

BLOCK

INITIZLIZATION

BLOCK

 

 

 

 

 

 

 

 

 

 

 

 

 

9

SYNC

REFI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C802

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

820pF

 

 

OSCILLATOR

 

 

 

 

 

 

 

 

 

 

2

R812

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

R802

RF

 

 

 

 

 

LATCH

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

 

 

 

 

 

R813

 

 

 

 

 

 

22k

STANDBY

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BUFFER

 

 

15

 

 

 

 

 

 

R803

 

RP

 

 

 

 

 

=1

 

Q

 

 

 

 

 

 

 

 

 

 

 

12

 

 

STANDBY

 

 

 

 

 

 

 

 

 

 

 

Q801

 

 

 

4.7k

STANDBY

 

 

 

 

 

 

 

 

 

 

4

C813

 

 

 

 

 

 

 

 

 

(REDUCED FREQUENCY)

 

 

 

 

 

 

 

 

 

 

 

PC123F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2200pF

 

 

 

 

 

 

C803

 

 

 

 

 

VSB

 

THERMAL

 

 

 

VREF

VOC

 

 

 

 

 

 

 

 

 

470p

 

2.5V

 

 

 

 

SHUTDOWN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

 

ERROR

 

OUT

 

 

 

 

OVER

 

OVER

 

D836

D835

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

 

VOLTAGE

6

 

 

 

 

 

 

 

 

 

 

 

 

 

IREF

 

 

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PROTECT

 

 

 

 

 

 

 

R805

R804

C804

VOLTAGE

 

 

 

 

 

 

 

MANAGEMENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D814

 

 

 

 

15k

15k

4700pF

FEEDBACK

 

 

 

 

 

 

 

 

 

 

 

R814

 

 

 

 

 

 

 

 

 

 

DMAX&

 

 

 

 

 

 

 

AG01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UVL01

 

 

 

 

 

1.8k

 

 

 

 

 

 

 

E/A OUT

 

 

 

 

SOFT-START

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R815

 

 

 

 

 

 

 

13

 

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.8k

 

 

 

 

 

 

 

 

FOLDBACK

 

 

 

 

 

VREF

 

 

 

 

 

R816

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

180

C814

 

 

 

 

 

 

 

 

 

 

FOLDBACK

CURRENT

SOFTSTART

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

 

INPUT

 

SENSEINPUT

&DMAX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

7

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R806

 

 

R808

R807

C809

R809

C810

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1k

 

 

18k

 

180k

330

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1500p

 

2.2/50V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q851

 

 

 

 

 

 

 

 

 

 

 

 

 

LM317

 

 

L854

 

 

 

L831

 

 

 

 

 

 

 

 

 

 

10µH

 

 

 

D851

 

 

 

L853

 

 

 

 

 

 

 

 

 

 

 

 

4.7µH

 

 

 

 

 

 

C892

Q892

 

AG01

 

 

 

 

 

R853

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100/25

PC123F

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R852

C854

C855

 

 

 

14

 

C851

 

 

 

 

 

220

0.1

 

 

 

 

 

 

 

 

 

 

100/6.3V

 

 

 

 

 

 

0.1

C852

 

L851

 

 

R851

 

 

 

 

R894

 

 

 

 

330

 

 

 

560

 

 

 

 

1k

 

 

 

 

4.7µH

 

 

 

L852

 

 

 

 

 

 

/16V

 

 

 

 

 

 

J851

 

13

 

 

 

 

 

 

 

 

 

 

 

 

+4.1V

 

 

 

 

 

 

 

 

L856

C860

C859

 

 

 

 

 

 

 

 

 

 

 

6.8µH

(OPTION)

 

 

 

-34V

 

12

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D856

C856

C857

 

 

 

 

 

 

 

 

 

GND

 

2200

 

 

 

 

 

 

 

 

 

 

RK46

 

 

/10V

 

 

 

 

 

 

 

 

 

+5V

 

11

 

 

 

 

 

 

R861

 

 

 

 

 

+5V

 

 

 

 

 

 

 

 

10k

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

L862

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

10

 

 

 

 

 

 

 

 

 

10µH

 

 

 

 

D861

 

 

 

 

 

R862

 

 

 

 

GND

 

L861

 

 

 

 

 

D862

C864

 

 

+12V

 

1µH

AG01

 

 

 

Q861

1k

 

 

 

 

 

 

 

 

 

 

 

220/50V

 

-8V

 

9

 

 

 

 

 

2SC

R863

 

 

 

 

 

 

 

 

C862

 

Q862

 

 

 

 

 

 

 

 

C861

 

 

2SA

10k

R865

 

 

 

 

 

 

 

 

 

10/50V

 

 

 

 

10k

 

 

 

 

 

 

 

 

 

 

 

+12V

 

 

 

 

 

 

 

 

 

 

 

 

R864

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C869

 

 

D866

 

 

 

 

 

 

 

10k

L867

 

 

 

 

 

 

 

 

 

 

 

 

D868

220

 

 

RU4YX

 

 

 

 

 

 

 

2.2µH

 

/16V

 

 

8

C866

L866

C867

 

 

 

Q871

 

R866

 

 

 

 

 

C868

 

 

 

1k

 

 

 

 

 

0.1

 

1000

 

 

7908

 

 

 

 

 

D871

 

 

/16V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AG01

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

L871

 

L872

 

 

 

C877

C875

 

 

 

 

 

C871

 

 

 

 

 

 

 

 

 

C872

 

10µH

 

 

 

0.1

100

 

 

 

 

 

0.1

 

 

C873

R881

R882

 

 

/16V

 

 

 

 

 

 

 

220

 

 

 

 

 

 

 

 

 

 

 

/16V

 

220

3.3k

100

 

 

 

 

 

 

 

 

 

 

 

 

/16V

 

 

 

L873

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C876

 

 

 

 

C882

R883

 

 

 

 

 

 

 

 

 

 

 

 

0.022

1.8k

 

 

 

 

 

 

 

 

 

 

 

R887

D881

 

 

 

 

 

 

C881

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

100

TL431

 

R884

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

/25V

 

 

 

 

 

 

 

 

 

2.21k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1%

 

 

 

 

 

 

 

 

 

 

J891

 

 

 

 

R885

 

 

 

 

 

 

 

 

 

 

 

 

 

 

681

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C898

 

 

 

R886

 

 

 

 

 

 

 

 

 

 

0.1

 

+12V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R892

 

R893

 

 

 

 

 

 

 

 

 

 

 

 

22k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10k

 

 

 

 

 

 

 

 

 

 

 

Q891

R891

 

 

 

 

 

 

 

 

 

 

 

 

 

2SC2878

22k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C891

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100/25

 

 

 

 

 

 

 

 

 

 

 

Figure 8-10 ‘Blockdiagram P816’

Description of controller MC44603

The MC44603 is an enhanced high performance controller that is specifically designed for off-line and DC-to-DC converter applications. This device has the unique ability of automatically changing operating modes if the converter output is overloaded, unloaded or shorted. The MC44603 has several distinguishing features when compared to conventional SMPS controllers. These features consist of a foldback facility for overload protection, a standby mode when the converter output is slightly loaded, a demagnetization detection for reduced switching stresses on transistor and diodes, and a high current totem pole output ideally suited for driving a power MOSFET. It can also be used for driving a bipolar transistor in low power converters. It is optimised to operate in discontinuous mode but can also operate in continuous mode. Its advanced design allows use in current mode or voltage mode control applications.

Pin connections

 

 

VCC

1

16

VC

2

15

Output

3

14

Gnd

4

13

Foldback Input

5

12

Overvoltage Protection (OVP)

6

11

Current Sense Input

7

10

Demag. Detection

8

9

 

Figure 8-11

 

Rref

R Frequency Standby

Voltage feedback Input

Error Amp Output

R Power Standby

Soft-Start/Dmax/

Voltage Mode

CT

Sync Input

CL 96532076_030.eps 290799

20

Image 22
Contents Service Manual Brazil USAEurope / Trading AmericasPlayback & Recording and Disc CDR loader CDR main module CDL4009 or MAR770 This PCB contains the headphone socketTechnical Specifications GeneralESD IIIService Hints Service Tools Dealer diagnostics Dealer modeStatus of player Electrical service diagnostics Software versions, test for defective componentsMechanical service diagnostics DC-erase service mode Erasement of complete CD-RWFaultfinding trees CDR-ModuleCD-DA Disc Loaded CD R Display no Wiring Power Supply Voltages Electrical Service DiagnosticsCD-RW Disc Loaded CD RWCD Module Check Flex Connection from CDR Main Board Power Supply+3V3 AT IC7000 Pins 5,17,21,57, Check Safety Resistors OPEN/CLOSECD Module Playback General description Display BoardDescription of display board Display controller TMP87C874FTest instructions Clock signalControl signals Supply voltagesRotary operation IR receiver remote controlEasy jog knob Push button operationControl Signals Display board troubleshooting guideClock Signal FTD Drive LinesDescription of controller MC44603 Power Supply Unit P816Description of P816 Pin connectionsPin Name Pin function descriptionVCC Start up sequence of P816 Block diagram of MC44603Operating description of MC44603 Regulation of P816Ch1 Drain voltage Ch2 Drain current Ch3 Gate voltage Circuit description of P816 Troubleshooting P816 CD Main BoardDescription Block DiagramMeasurements Pin Configuration Test points on driver Input conditions conn 1006 pin Outputs connUcoil Vcoil Wcoil Hallu Hallv HallwDC Settings HF PathTransfer Characteristics Hfdet SettingIIS CLK11 Nmute DAC Amplifier Wiring Diagram Pink12V CD WY01at conn.F934of WY02 WY03 WY04 CDR main board10 D5V WC01at conn.1209 WC02at conn.1400 W801at conn.1500Block Diagram CDR Main BoardSchematic Diagram and Parts Location PY46Switching Power Supply PCB. P816 Q810 Q801 Q891 Q871 Q825 Q861 Q862 Q851 Q892QN54 QN53 QN58 QN57 Q311 Q681 QF52 QF51 QN52 QN51 QG56 QN55 QY01 QY02 QY04Exploded View and Parts List Packing Not Standard Spear PartsCeramic CAP Electrical Parts ListElectroly CAP P816-SEMICONDUCTORS P816-POWER Circuit Board P816-CAPACITORSP816-RESISTORS P816-MISCELLANEOUSPP16-SEMICONDUCTORS PP16-REAR Panel Circuit Board PP16-CAPACITORSPP16-RESISTOR PP16-MISCELLANEOUSPY36-ROTARY Encoder Circuit Board
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MAR770, MAR775, DR-6000 specifications

The Marantz DR-6050 and DR-6000 are revered components in the world of high-fidelity audio systems, reflecting the brand's long-standing commitment to quality and performance. These models have gained popularity among audiophiles for their comprehensive features and advanced technologies, which cater to both casual listeners and serious music enthusiasts.

The Marantz DR-6050 is a CD recorder and player that stands out with its dual functionality. It allows users to enjoy CDs while also having the capability to record directly from various sources, including analog inputs and digital connections. This functionality is essential for those who wish to preserve their vinyl records, cassettes, or other audio formats onto CD. The machine supports CD-R and CD-RW media, providing flexibility for repeated use and recording.

One of the standout technologies in the DR-6050 is its high-quality Digital-to-Analog Converter (DAC), which significantly enhances sound performance by converting digital signals to analog with incredible accuracy. This contributes to the unit's ability to reproduce audio with rich detail and clarity. Additionally, the recorder is equipped with a Microprocessor that ensures precise recording levels and optimizes the quality of the output.

On the other hand, the Marantz DR-6000 offers similar capabilities but with an emphasis on simplicity and ease of use. Designed for users who appreciate an intuitive interface, it features straightforward controls and an ergonomic design. The DR-6000 supports multiple recording formats, including standard audio CDs, making it versatile for various playback systems.

Both models are built with high-grade components that promise longevity and reliability. They feature robust construction, ensuring minimal vibration and interference to enhance playback quality. Integrated analog and digital inputs allow for diverse connectivity options, which is crucial for users with elaborate audio setups.

In terms of audio performance, both the DR-6050 and DR-6000 exhibit impressive frequency response and low distortion levels, characteristics that are vital for a satisfying listening experience. The devices also include features like playback speed control and disc finalization options, providing the user with complete control over their audio sessions.

The Marantz DR-6050 and DR-6000 are ultimate companions for those who appreciate high-quality sound and need versatile recording solutions. With their blend of advanced technologies, clear audio output, and user-friendly designs, they remain solid choices for anyone looking to enhance their audio collection and experience.