Drum Assembly Replacement, Overviews | Sony DVW-790WS/790WSP

4-2. Parts Replacement

4-2-4. Drum Assembly Replacement

Overviews

Replacement

Video Head Cleaner Removal

Disconnection of the Brush Assembly Connector

Drum Assembly Removal

Cleaning of Contact Surfaces

Drum Assembly Installation

Connection of the Brush Assembly Connector

Video Head Cleaner Installation

Cleaning of Video Heads and Tape Running Surface

Adjustments after replacement

Tape Running Adjustment

Video Tracking Adjustment

CTL Head Height Adjustment

CTL Head Position Adjustment

CUE Head Height Adjustment

CUE/TC Head Position Adjustment

PG Phase Adjustment

Automatic Servo Adjustment

Video System Adjustment (Equalizer)

Notes

When replacing the drum assembly, take care not to damage the CTL head, CUE/TC head and the peripheral tape guides.

Take care not to break the video heads of the drum assembly.

Basic information

Apart from the periodic replacement, the drum assembly needs to be replaced in the following cases.

.If the drum assembly could not be used because the tape running surface of the upper or lower drum scratched.

.If a correct RF waveform is not obtained after the tracking adjustment due to wear-out on the upper or lower drum.

.If the specification of the VTR such as jitter or noise does not meet due to the short life of the bearing.

4-24	DVW-790WS/709WS/707

DVW-790WSP/709WSP/707P P2V1

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Sony DVW-790WS/790WSP, DVW-709WS/709WSP manual Drum Assembly Replacement, Overviews

Contents

DVW-707/707P DVW-709WS/709WSP DVW-790WS/790WSP Warnung Recycling NICKEL-CADMIUM Batteries Page Table of Contents Mechanical Deck Parts Replacement Audio IN, Audio OUT CH1, CH2, DC IN, DC OUT Tape Path Adjustment VTR System Alignment DVW-790WS/709WS/707 Camera System Electrical Alignment Only for DVW-707/707P Page Contents Purpose of this manual Related manuals Fixtures and Adjustment Equipment FixturesIllust No. Part No Description Usage Illust No Description Usage Adjustment Equipment Equipment Model Name Using the Extension Boards Using the EX-655 and EX-656 BoardsProcedure Board to be Extension board Reference Checked Using the EX-657 and EX-658 Boards When extending the DCP board assembly Using the EX-667 Board SV-210 BoardDC-DC Converter DIF-75 Board Optional Board BKDW-702 CN2CN2CN22 Disconnecting/Reconnecting Flexible Card Wires DisconnectingReconnecting IC Link Description on EEPROM/NV-RAM Data Spare CCD UnitsDescription on CCD Block Number Setting/Adjustment After Board Replacement Adjusting After Eeprom ReplacementEeprom on the ES-23 Board Ref. No. Address Data stored DC Fans Precaution Setting/Adjusting After Board ReplacementsBoard Setting/Adjusting after Replacement Page Service Mode About the Setup CardHow to Enter the Service Mode Data Structure Fundamental Operation of the Setup Menu Contents of Setup Menu White Preset Master Gain LOWMID High Setup Card Read →CAM Write →CARDID Edit Write Protect VTR Mode Function 2/2 DCC Function FIX/DCC/ADP.KSEL DCC FIX VF Setting Zebra 1 Detect Zebra 1 ApertureZebra 2 Detect Zebra Select Burst Phase RGB Setup LVLENC Setup LVL Level Skin Tone DTL Level Black FlareTest OUT ENC/R/G/B Level Gamma Table Level Phase SC PhaseIris Mode Iris Weight Adjustment Shading GSAW Para Preset WHT Offset WHTOffset Whitea WARM-COOLA Battery Operation B-G SELLOW Light LOW Light Level Delay Data ResetService Operation AWB Level Gate Menu SEL Setup Card VF SettingMenu SEL Marker 1/3 Marker 2/3 Resolution MeasurementModulation Sensitivity AD Gain AD Clock Phase Clock PhaseND Comp ND Detection OFF/EXEC/RESET VTR ADJ EQ Adjustment Display Description DP DIAG.STATUS MPXDTL ROM Setup Menu List Setup C RM-P9 RM-B150 SET C-SET Remark Turbo YES Setup C VTR Mode YES OFF REC Inhibit CCU Assignable SWRemark Shutter EVS YES CLS SET Remark YES Level ENC Y Level YES Black Flare Test OUT SC 0/180 SEL RM-B150 SET C-SET Remark Preset WHT Color Temp P YES Delay YESREC Tally YES Upper Time Code Disp OFF Loop Recording FRM Shutter FRM Shutter Unit YES OFF YES Function 1/2 OFF Function 2/2 VF Setting Wide Screen YES OFF Level 143DTL Level 243DTL Menu SELYES OFF Level 11SC-H BC COMP.ADJ FIELD/FRAME YES Field Test OUT ENC Vsub Gain TMP MOD.BAL. TMP SAW/REC Test Level Test SAW OFFPreknee KS on Test OUT ENC Test SAW OFF AD ADJ AD Gain AD Clock Phase ND Comp ND Detection OFF YET Setup C RM-P9 RM-B150 F-SET MPX DTL ROM SV1 SV2 WSHPage Section Parts Replacement Replacing Boards Replacing the MB-810 and MB-811 Boards MB-810 Board MB-811 Board Replacing the HN-260 Board Replacing the CI-20 and CI-21 Boards Removal Replacing Boards Reinstallation Required tools Replacement Adjustments after replacementReplacing the CCD Unit and Its Components Replacing the CCD Unit Removal Removing the Front Assembly CN1 CN2 Removing the ND Filter Knob Removing the CC Filter Knob DVW-790WS/790WSP/709WS/709WSPRemoving the CCD Unit DVW-790WS/790WSP/709WS/709WSP Reinstallation Reinstalling the CCD Unit Reinstalling the ND Filter KnobDVW-790WS/709WS DVW-707 Reinstalling the Front Assembly Adjustment After Replacement Tape Running AdjustmentElectrical Alignment Reinstallation Adjustment After ReplacementCN3 Replacing the Boards Inside the CCD Unit CN5 CN2 CN3 CN1 CN6CN7 CN4 790WS/790WSP Replacing the External Connectors/Switches CH2, DC IN, DC OUT ConnectorsRemoving the Connector Box Assembly Removing the CNB-11 Board Removing the CNB StayRemoving the RM-180 Board Removing the Connector Audio IN/AUDIO OUT connectorDC in connector DC OUT connector VF Connector Power Switch, MIC in Connector Power SwitchMIC in Connector Shutter Switch Replacing the Rotary Encoder Replacing the DC Fans Upper DC Fan Lower DC Fan Replacing the Camera SW Ornamental Plate CP-329 board Removal Required tool Camera SW ornamental plate Mm or less Inside panel Replacing the Card Door Assembly Replacing the 40-pin Fitting AssemblyReinstallation Required tool General Information for Parts Replacement and Adjustment About Cleaning Blade Tape Cleaner depending on modelAbout Tools Threading End/Unthreading End Mode Threading End ModeUnthreading End Mode Selection Procedure into the Unthreading End Mode Manual Eject Assembly Removal/Installation Installation Index Part Name Section About screwdriver and torque reading About stop washer About oil and grease Upper Drum Assembly Replacement Overviews Basic information PreparationsTools Brush Assembly Removal Removal Brush Cover Removal Desoldering the Leads of Slip Ring Assembly Upper Drum Assembly Removal Installation Cleaning of Contact Surfaces Upper Drum Assembly Installation Upper Drum Eccentricity Adjustment Tool Installation Upper Drum Eccentricity Adjustment Upper Drum Eccentricity Adjustment Tool Removal Soldering the Leads of Slip Ring Assembly Brush Assembly InstallationBrush Cover Installation Cleaning of Video Heads and Tape Running Surfaces Adjustments After Replacement Tape Running Adjustment Video Tracking AdjustmentCTL Head Height Adjustment CTL Head Position Adjustment Brush Assembly Replacement for Slip Ring 2x2 Brush assembly Brush cover Connector Installation Brush Assembly Installation Slip Ring Assembly Replacement Remove this screw first Slip Ring Assembly Removal Installation Slip Ring Assembly InstallationBlue Brush Assembly Installation Drum Assembly Replacement Removal Video Head Cleaner Removal Disconnection of the Brush Assembly Connector Drum Assembly Removal CN2 CN3 Cleaning Drum assembly Positioning pins Drum Assembly Installation Connection of the Brush Assembly ConnectorVideo Head Cleaner Installation Cleaning of Video Heads and Tape Running Surface CUE Head Height Adjustment Video System Adjustment Pinch Roller Replacement Installation Install Shaft Cleaning Pinch Roller InstallationPinch Roller Cleaning Removal Pinch Roller Removal HC Roller Assembly Replacement for Video Heads Removal Mode Selection VH Cleaner Assembly Removal Installation HC Roller Replacement VH Cleaner Assembly InstallationOperation Ceck CUE Brush Replacement for CUE Head Manual Eject Assembly Removal Installation CUE Brush Replacement Manual Eject Assembly InstallationOperation Check Brake Band Assembly Replacement Brake Band Assembly Removal Removal Band Holder Removal Installation Reel Table Cleaning Brake Band Assembly Installation Band Holder Installation FWD Back Tension Adjustment Soft Brake Assembly Replacement Adjustment after replacement Removal Soft Brake Assembly Removal Soft Brake Assembly Installation Adjustment After Replacement Brake Torque Check 10. S/T Idler Assembly Replacement Or T Idler Assembly Removal Installation Cleaning of the Installation ShaftOr T Idler Assembly Installation 4x2.5 Swing Gear Assembly Replacement Removal Removal of the Swing Gear Assembly Fixing Screw Mechanical Deck Assembly Removal Swing Gear Assembly Removal Installation Swing Gear Assembly Installation Mechanical Deck Assembly Installation Swing Gear Assembly Fixation Adjustment After Replacement Belt Tension Adjustment Timing Belt Replacement Removal Mechanical Deck Assembly Removal Installation Cleaning of the Pulleys Timing Belt InstallationTiming Belt Removal HN hole Capstan Motor Replacement Removal Manual Eject Assembly Removal Installation Capstan Motor Installation Capstan Motor Removal With drop-safe Pin of the chassis Adjustments After Replacement Belt Tension Adjustment CTL Head Replacement Removal Entrance Head Assembly Removal Installation CTL Head Replacement Entrance Head Assembly InstallationEntrance Head Assembly Cleaning Adjustments After Replacement Tape Running Adjustment CUE Head Replacement Gear Block Assembly Removal Cassette Compartment Removal CUE Head Block Assembly Removal Installation CUE Head Replacement CUE Head Block Installation Cleaning of the Head Cassette Compartment InstallationGear Block AssembIy InstaIIation Video Tracking Adjustmen Audio System Adjustment Reel Table Replacement Removal Reel Table Removal S reel table removal Reel table removal Installation Reel Shaft Cleaning Reel Table InstallationReel Table Height Adjustment Adjustments After Replacement FWD Back Tension Adjustment Put the remaining poly washer s in the step Pinch Arm Assembly Replacement Removal Pinch Arm Assembly Removal Installation Installing Shafts Cleaning Applying Oil to Installing Shafts Pinch Arm Assembly Installation Pinch Eoller Cleaning Sensor a Detection Pin Replacement Removal Sensor Cover a Removal Installation Detection Pins Installation Sensor Cover a Installation Sensor B Detection Pin Replacement Removal Sensor Cover B Removal Sensor Cover B Installation Tension Regulator Arm Assembly Replacement Tension Regulator Arm Assembly Removal Removal Brake Band Removal Installation Tension Regulator Arm Assembly Installation Brake Band InstallationTension Regulator S4 Guide Cleaning Overviews Preparations Disconnection Brush Assembly Connector Removal Cassette Guide Removal Drawing Arm Removal Driving Gear RemovalCatcher S Removal Threading Link Assembly Removal Slider Threading base Threading gear assembly installation Parts Replacement Threading Link Assembly Installation Catcher S Installation Driving Gear Installation Drawing Arm Installation 100 Connection the Brush Assembly Connector Cassette Guide InstallationCleaning of the Head and the Tape Running Surface Replacement of Loading Motor Motor Removal Pinion Gear Removal Installation Pinion Gear Installation Motor Installation Gear Block Assembly Installation Replacement of FE Head 108 FE Head Removal Remove the one screw and remove the FE head Harness Removal Harness SolderingBLK GRY Installation FE Head Installation Replacement of Tape Cleaner Tape Cleaner RemovalInstallation Tape Cleaner Installation Replacement of Tape Guide Tape Guide Removal Installation Tape Guide Installation 114 Adjustment After Replacement Tape Guide Height Adjustment 115 116 Mechanical Deck Replacement Removing the Mechanical DeckAttaching the Mechanical Deck Mechanical Adjustment Tension Regulator Operating Position Adjustment Check Mode Selection Adjustment Position Adjustment Point for adjustmentMode Cancel Tension Regulator Operating Position Check FWD Back Tension Adjustment Tool Check REC Mode Setting Adjustment Eject Mode SettingBack Tension Adjustment Reference of adjustment Brake Torque Check Check Setting Case that the value does not meet the specificationAdjustment Mode Cancel Side Brake Torque Check Belt Tension Adjustment Adjustment Belt Tension AdjustmentPage Index Location of Tape Path System Contents Tape Running Adjustment Checks Play Mode Playing back the tape topSpecifications Drum Entrance Side Threading End Mode FWD Mode Fast forward at tape top REW Mode Rewind at tape topPlay Mode Playback at tape end REV Mode Rewind at tape end FWD Mode Fast forward at tape endREW Mode Rewind at tape end Checks After Adjustment Video Tracking Check Tape Running Re-check at the Drum Entrance SideTape Running Check at the Drum Exit Side CTL Head Height Check Drum Exit Side Checks Play Mode Playing back the tape top REV Mode Rewind at tape end Tape Running Check Around the Capstan Shaft Adjustments T2 and T3 Guides Height Adjustment Reference for adjustmentCUE Head Azimuth Adjustment Tape Running Re-check at the Drum Exit Side Video Tracking Adjustment Checks Play Mode Play ModeRF Waveform Check REV search mode Drum exit side Tracking Adjustment Drum Exit Side Video Tracking Re-checkTape Running Check CUE Head Height Check CTL Head Height Adjustment If the Level Increases When Pushing Up the Tape Adjustments After Adjustment CTL Head Position AdjustmentChecks Play Back CTL Head Position Adjustment Adjustments CTL Head Position Adjustment Adjustment After Adjustment CUE/TC Head Position AdjustmentCTL Head Position Re-check CUE Head Height Adjustment Play back ZR2-1/P from 00 minute to 15 minute segment Adjustments CUE Head Height Adjustments CUE Head Head-to-contact Check CUE Head Azimuth Check CUE Head Head-to-tape Contact Adjustment CUE Head Azimuth Check CUE Head Head-to-tape Contact Adjustment Adjustments CUE Head Head-to-tape Contact Adjustment CUE Head Head-to-tape Contact CheckCUE Head Head-to-tape Contact Re- check CUE/TC Head Position Adjustment Adjustments Play Back AdjustmentCUE/TC Head Position Re-check SV REF CF Re-check according to the steps 1 CUE Output Level Check Check CUE Output Level Check Preparation Power System Adjustment Battery End Detection Voltage AdjustmentAdjustment Procedure Check Procedure Servo System Adjustment Automatic Servo AdjustmentSetting upon Completion of Adjustment Automatic PG Phase Adjustment Manual PG Phase Adjustment Audio System Adjustment 1. D/A Level AdjustmentGND Output Limiter Adjustment AGC Level Adjustment CUE Playback Level Adjustment CUE Recording Bias Adjustment CUE Recording Level Adjustment Video System Adjustment Preparation Playback Equalizer Automatic Adjustment Confirmation Procedure Recording Current Automatic Adjustment PrecautionPage General Information for Electrical Adjustment Initial Switch SettingsScreen Mode Setting Equipment/Fixtures Initial Setting Maintaining the Grayscale Chart Handling precautionsReplacement period when the chart is used as the reference Murakami Color Research Laboratory Setting Illumination when the reflective chart is used VCO Cont Frequency Check Test OUT → ENCINT SC Frequency Video GEN OUT Lock AD Clock Phase Adjustment AD Clock PhaseClock Phase IRE Ntsc ENC OUT Adjustment ENC Level Adjustment Chroma Adjustment INT SC Phase Adjustment SC PhaseSetting After Adjustment Blanking Width Test OUT Level Adjustment RGB SetupRGB Sync RGB Level Modulator Balance Adjustment → CAM/ON Test SAW Adjustment R/B AD Gain Adjustment Knee → OFFAD Gain Test SAW → OFF Gamma VA Gain Adjustment S35*PRESET WHT Color Temp PGamma → on Preset White Adjustment Shading AdjustmentBlack Shading Adjustment White Shading Adjustment S30 *W-SHADING GS32 *W-SHADING B Gamma Correction Adjustment Master GammaTest SAW → OFF Black Set Adjustment Setting After Aadjustment Flare Adjustment Flare Knee and White Clip Adjustments Manual Knee and White Clip Adjustments DCC Pre Knee Adjustment Gamma → OFF Test SAWPreknee DCC DCC Knee Adjustment DCC Point →DCC D Range Detail Signal Adjustment Crispening AdjustmentLevel Depandent Adjustment Detail Frequency Adjustment 16-4. H/V Ratio AdjustmentRatio Detail Level Adjustment Knee Aperture AdjustmentKnee APT APT.LVL Detail Black Clip Adjustment 169/43 Mode → Select the 43 mode 17-4. H/V Ratio Adjustment Detail LVL DTL H B . Clip 43 Factory setting Skin Tone Adjustment Zebra Adjustment Automatic Iris Adjustment Iris ModeIris Weight → 0 MIN Iris Weight Adjustment After Replacing Filter Disk Unit ND Detection → Exec Initial Setting for Switches LensIris → C Close S06*MASTER Gain Maintaining the Grayscale Chart Setting Illumination when the reflective chart is used Video OUT GEN SC Lock OUT Spec = 40 ± 1 IRE Ntsc = 300 ± 7 mV PAL On the setup menu, adjust as follows S40*ENC ADJ Spec 10.9 ± 0.2 us Ntsc 12.0 ± 0.3 us PAL Spec = 100 ± 2 IRE Ntsc = 700 ± 14 mV PAL Spec = 100 ± 2 IRE Ntsc = 700 ± 10 mV PAL Make sure that the carrier leakage at portion B is not S35*PRESET WHT Fine Whitep S48*B-SHADING GS50*B-SHADING B Para On the setup menu, adjust as follows S25 *LEVEL Spec ± 1 IRE Ntsc ± 7 mV PAL Spec 109 ± 2 IRE Ntsc 763 ± 14 mV PAL Spec ± 2 IRE Ntsc DCC Knee Adjustment Reduce the noise at gray portion to a 16-4. H/V Ratio Adjustment Detail Level Adjustment On the setup menu, set as follows S12*FUNCTION 1/2 Component in the saturation detection ZEBRA1 APT. LVL → 1 % Adjustment Procefure Adjustment After Replacing Filter Disk Unit DVW-790WS/709WS/707 DVW-790WSP/709WSP/707P P2V1 Sony Corporation