Marantz MAR770, DR-6000, MAR775 Display board troubleshooting guide, Clock Signal, Control Signals

Page 21

8.1.3Display board troubleshooting guide

SWITCH POWER ON,

EXIT STAND BY

MODE

NO

DISPLAY?

YES

CHECK :

SUPPLY VOLTAGES

-35V± 5% at conn. JY01-2

3V8 ± 10% between conn. JY01-1 and JY01-3 +5V ± 5% at conn. JY01-10

CLOCK SIGNAL

8Mhz at pins 8, 9 of QY01

CONTROL SIGNALS

RESETN 3V3 (high) at conn. JY01-4 after start up I2C DATA at conn. JY01-5

I2C CLK at conn. JY01-7

FTD DRIVE LINES

Filament voltage 3V8 10% between pins 1-3 and pins 1-52 of the FTD (VX01)

Grid lines (see test instructions) Segment lines (see test instructions)

ELECTRICAL SERVICE DIAGNOSTICS - Local display test

KEYNO FUNCTIONS?

YES

REMOTE NO CONTROL?

YES

DISPLAY BOARD

OK

CHECK:

KEY MATRIX LINES (see test instructions)

ELECTRICAL SERVICE DIAGNOSTICS – Keyboard test

EASY JOG KNOB (see test instructions)

CHECK:

IR RECEIVER signal at pin 22 of QY01 ( see test instructions) ELECTRICAL SERVICE DIAGNOSTICS – Remote control est

CL 96532076_020.eps 290799

Figure 8-9 Display board troubleshooting’

19

Image 21

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/CLOSE CD 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

Related manuals

Manual 1 pages 62.37 Kb