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Marantz MAR770, DR-6000, MAR775 service manual IIS CLK11 Nmute DAC Amplifier

Models: MAR770 MAR775 DR-6000

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Measurements

IIS

CLK11

NMUTE

DAC

22

25

Figure 8-33

AMPLIFIER

1200 -17

1200 -19

CL96532086_062.eps 080999

Keep processor 7202 in reset by forcing pin 7 of connector 1208 to +5V. This puts the processor outputs in tristate. Check the reset at pin 4 of processor 7202 to make sure that the processor is in reset.

Now, force port 0-4 pin 33 at 7202 to 0V to set the decoder outputs (SCLK, WCLK, DATA, and CL11).

Check the MUTE pin 11 at 7309 : this pin should be low. Connect via an I2S generator I2S-signals to the DAC : Pin 1 at 7309: SLCK.

Pin 2 at 7309: WCLK.

Pin 3 at 7309: DATA.

Connect also the SYSCLK pin 6 at position 7309 to a clock signal of 11.2896 MHz ±100ppm.

Generate an I2S signal equivalent with a sine wave of 1kHz at 0dB for both left and right channels.

Check if 0.8 VRMS at pins 14 and 16 at location 7209 with a DC of 1.65VDC.

Check if 1.7 VRMS ±2 dB at connector pins 1and 3 at location 1209.

Force MUTE Pin 11 at 7309 high.

Measure again at pins 1 and 3 at location 1209 : both signals should be at -90 dB.

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Image 33

Marantz MAR770, DR-6000, MAR775 service manual IIS CLK11 Nmute DAC Amplifier

Contents

Service Manual Europe / Trading USABrazil AmericasPlayback & Recording and Disc This PCB contains the headphone socket CDR loader CDR main module CDL4009 or MAR770General Technical SpecificationsIII ESDService Hints Service Tools Dealer mode Dealer diagnosticsStatus of player Software versions, test for defective components Electrical service diagnosticsMechanical service diagnostics Erasement of complete CD-RW DC-erase service modeCDR-Module Faultfinding treesCD-DA Disc Loaded CD R CD-RW Disc Loaded Wiring Power Supply Voltages Electrical Service DiagnosticsDisplay no CD RW+3V3 AT IC7000 Pins 5,17,21,57, Check Safety Resistors Check Flex Connection from CDR Main Board Power SupplyCD Module OPEN/CLOSECD Module Playback Description of display board Display BoardGeneral description Display controller TMP87C874FControl signals Clock signalTest instructions Supply voltagesEasy jog knob IR receiver remote controlRotary operation Push button operationClock Signal Display board troubleshooting guideControl Signals FTD Drive LinesDescription of P816 Power Supply Unit P816Description of controller MC44603 Pin connectionsPin function description Pin NameVCC Operating description of MC44603 Block diagram of MC44603Start up sequence of P816 Regulation of P816Ch1 Drain voltage Ch2 Drain current Ch3 Gate voltage Circuit description of P816 CD Main Board Troubleshooting P816Block Diagram DescriptionMeasurements Pin Configuration Ucoil Vcoil Wcoil Input conditions conn 1006 pin Outputs connTest points on driver Hallu Hallv HallwHF Path DC SettingsHfdet Setting Transfer CharacteristicsIIS CLK11 Nmute DAC Amplifier Pink Wiring Diagram10 D5V WC01at conn.1209 WC02at conn.1400 WY01at conn.F934of WY02 WY03 WY04 CDR main board12V CD W801at conn.1500CDR Main Board Block DiagramPY46 Schematic Diagram and Parts LocationQ810 Q801 Q891 Q871 Q825 Q861 Q862 Q851 Q892 Switching Power Supply PCB. P816QY01 QY02 QY04 QN54 QN53 QN58 QN57 Q311 Q681 QF52 QF51 QN52 QN51 QG56 QN55Exploded View and Parts List Not Standard Spear Parts PackingElectrical Parts List Ceramic CAPElectroly CAP P816-RESISTORS P816-POWER Circuit Board P816-CAPACITORSP816-SEMICONDUCTORS P816-MISCELLANEOUSPP16-RESISTOR PP16-REAR Panel Circuit Board PP16-CAPACITORSPP16-SEMICONDUCTORS PP16-MISCELLANEOUSPY36-ROTARY Encoder Circuit Board