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Sony HDW-250 Maintenance Manual

Hd digital videocassette recorder
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HD DIGITAL VIDEOCASSETTE RECORDER
HDW-250
MAINTENANCE MANUAL
Part 1
1st Edition
Serial No. 10001 and Higher

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Summary of Contents for Sony HDW-250

  • Page 1 HD DIGITAL VIDEOCASSETTE RECORDER HDW-250 MAINTENANCE MANUAL Part 1 1st Edition Serial No. 10001 and Higher...
  • Page 2 Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres. Pour toute réparation faire appel à une personne compétente uniquement. HDW-250...
  • Page 3 Gerät abschaltet und signalisiert “Batterie leer” oder nach längerer Gebrauchsdauer der Batterien “nicht mehr einwandfrei funktioniert”. Um sicherzugehen, kleben Sie die Batteriepole z.B. mit einem Klebestreifen ab oder geben Sie die Batterien einzeln in einen Plastikbeutel. 1 (P) HDW-250...

  • Page 5: Table Of Contents

    1-12-2. Audio Meter Brightness Adjustment ........1-24 1-13. Optional Accessories ................. 1-25 1-13-1. Optional Accessories ..............1-25 1-13-2. Tools for Adjustment ............... 1-26 2. Error Messages and Error Logs 2-1. Error Messages .................... 2-1 2-2. Error Logs ....................2-2 HDW-250...
  • Page 6 Cleaning the Tape Running System and Tape Cleaner ....5-6 5-2-7. Cleaning the Fan Motor ............. 5-7 5-3. Periodic Check .................... 5-8 5-3-1. Hours Meter ................5-8 5-3-2. Periodic Check List ..............5-8 6. Spare Parts 6-1. Notes on Repair Parts .................. 6-1 6-2. Exploded Views ..................6-2 HDW-250...

  • Page 7: Manual Structure

    HDW-250. This manual describes the maintenance information and the information on primary services such as the replacement of main blocks and circuit board of the HDW-250. Related manuals In addition to this Maintenance Manual Volume 1, the following manuals are provided.

  • Page 9: Service Overview

    . In a car on a hot day . Near heating appliances +5.0 Power voltage : DC12 _1.0 Power consumption : During recording: About 52 W (CONFI ON, SDI OUT ON, COMPOSITE OUT ON) About 38 W (CONFI OFF, SDI OUT OFF, COMPOSITE OUT OFF) HDW-250...

  • Page 10: Locations Of Main Parts And Circuit Configuration

    TC IN/OUT Connectors TIMECODE SE-510 Sensor (Casette Coding) DET-36 Sensor (Thread/Unthread) DET-15 Cassette In Detector TR-57 S-Tension Detector POWER SUPPLY DC-85 DC Input Select Switch FU-76 Battery/EXT DC Selector OTHERS CN-1795 Camera Remote Connector CN-1926 Connection SE-435 (Reserved for future standardization) HDW-250...
  • Page 11 SERVO, SST-13 SYSTEM CONTROL, Full Erase & Channel Erase Oscillator TIMECODE CTL Rec/PB Amp POWER SUPPLY PSW-67 Switching Driver PSW-68 Switching Driver PSW-69 PWM Power Control PSW-70 Connection OTHERS MB-825 Motherboard TX-68A HD SDI Module RX-46A HD SDI Module HDW-250...
  • Page 12 1-2. Locations of Main Parts and Circuit Configuration System Board name Function SERVO, CS-25 Cassette Up/Down Detector SYSTEM CONTROL, TIMECODE CS-26 Cassette Up/Down Detector HDW-250...

  • Page 13: Locations Of Main Mechanical Parts

    !' T reel table 7 Upper drum !, S reel table 8 CUE brush !. S reel belt 9 CUE/TC head @/ FE head !/ Plunger solenoid (T reel brake) @- S reel motor !- Plunger solenoid (Pinch roller) @= CTL head HDW-250...
  • Page 14 1-2. Locations of Main Parts and Circuit Configuration Cassette compartment @[ DC motor HDW-250...

  • Page 15: Functions And Locations Of Sensors

    This sensor detects the position of the tension arm, and This is the REC inhibit plug sensor switch for large (L controls the reel torque during recording and playback size) digital cassettes. to keep the tension of S tape constant. HDW-250...
  • Page 16 This sensor detects whether a cassette is being insert- !; Cassette-up sensor !' Cassette-down sensor These sensors detect the movement of the cassette compartment by the combination of ON/OFF of the cassette-down sensor, cassette-up sensor and cassette- in sensor. HDW-250...

  • Page 17: Matching Connectors

    Use the following connectors and cables, or their equivalents when connecting cables to the connectors on the connector panel. Panel indication Matching connector/cable Name Sony part No. VIDEO IN 1-569-370-12 HD SDI IN, HD SDI OUT REF IN ANALOG HD COMPONENT, COMPOSITE...

  • Page 18: Signal Inputs And Outputs

    Analog audio : +4 dBm (0 dBm) low impedance, balanced _17 dBu EARPHONE _17 dBu HEADPHONES TC OUT 1.0 Vp-p (75 Z), 2.2 Vp-p (10 kZ) OTHERS REMOTE Sony 9-pin protocol or interface for RS-232C (switchable) CAMERA REMOTE For camera remote control (Sony new command) 1-10 HDW-250...
  • Page 19 Output impedance : Low impedance Digital command A Specified by BTA S-1005B Digital command B Digital command A Digital command B Power supply DC +10.6 V to +17 V, maximum 5 A GND (power supply) Shell Entire shield 1-11 HDW-250...
  • Page 20 _ _ _ _ _ External view _ _ _ _ _ _ _ _ _ _ External view _ _ _ _ _ Pin No. Signal Switchable between Sony 9-pin protocol and ISR using the GND (EXT DC) setup menu. (For the switching procedure, refer to Section “3-1. Setup menu”.)

  • Page 21: Removing And Reinstalling The Cabinets

    4. Remove the four knobs and remove the front panel. Switch cover can sometimes drop. Be careful not to lose it. Reinstallation Precaution After reattaching the front panel, check to see that the switch cover is installed with it. 1-13 HDW-250...
  • Page 22 Washer 2 Screws (B3 x 8) Left panel Screws (B3 x 6) Screws (B3 x 6) Screw (B3 x 6) Screws Screws Handle Screws (B3 x 6) (B3 x 6) (B3 x 8) Bottom panel Screws (B3 x 6) 1-14 HDW-250...

  • Page 23: Removing And Reinstalling The Cassette Compartment

    . Reattach the cassette compartment to the chassis so that After reattaching the connector panel, perform the tape run the two cassette guide pins go through the round hole of adjustment. (Refer to Maintenance Manual Part 2, Volume the stage. 1-15 HDW-250...

  • Page 24: Replacing The Battery Terminal

    Battery holder Screw (B2.6 x 5) Battery case Screw (B2.6 x 5) 3. Remove the four screws (B2.6 x 5) and replace the battery terminal. Battery holder Battery terminal Screws (B2.6 x 5) Screws (B2.6 x 5) 1-16 HDW-250...

  • Page 25: Setting Switches And Slit Lands On The Boards

    OPEN SL204 SL207 SHORT OPEN OPEN CH-3 SL302 SL305 OPEN OPEN SHORT SL303 SL306 OPEN SHORT OPEN SL304 SL307 SHORT OPEN OPEN CH-4 SL402 SL405 OPEN OPEN SHORT SL403 SL406 OPEN SHORT OPEN SL404 SL407 SHORT OPEN OPEN 1-17 HDW-250...
  • Page 26 SL701 SHORT OPEN OPEN SL702 OPEN SHORT OPEN SL703 OPEN OPEN SHORT CH-3 SL801 SHORT OPEN OPEN SL802 OPEN SHORT OPEN SL803 OPEN OPEN SHORT CH-4 SL901 SHORT OPEN OPEN SL902 OPEN SHORT OPEN SL903 OPEN OPEN SHORT 1-18 HDW-250...

  • Page 27: Board

    SL201 OPEN SHORT OPEN SL202 OPEN OPEN SHORT PB CH-2 SL203 OPEN SHORT OPEN SL204 OPEN OPEN SHORT PB CH-3 SL205 OPEN SHORT OPEN SL206 OPEN OPEN SHORT PB CH-4 SL207 OPEN SHORT OPEN SL208 OPEN OPEN SHORT 1-19 HDW-250...
  • Page 28 ON : Normal use OFF : Boundary ScanTest S100-2 27 MHz PLL Enable switch ON : Normal use OFF : Boundary ScanTest S100-3 PLD Programming Enable switch ON : Normal use OFF : Boundary ScanTest S100-4 Not used 1-20 HDW-250...
  • Page 29 Used during tape path adjustment ON : Enables the R/P envelope detection and turn off the power of both the EQ-76 board and the drum OFF : Normal use S601-2 Factory use S601-3 Factory use S601-4 Factory use 1-21 HDW-250...

  • Page 30: Sst-13 Board

    : _5 V of SYS and SV is opened OPEN SHORT : _5 V of SYS and SV is shorted SL603 OPEN : _5 V of longitudinal system and SV is opened SHORT SHORT : _5 V of longitudinal system and SV is shorted 1-22 HDW-250...

  • Page 31: Ejecting The Cassette Tape Manually

    When the tape cannot be rolled up, pull the reel brake release lever and rotate the reel motor driving gear clockwise to roll up the tape into the cassette. Reel brake release lever Reel motor driving gear Manual eject gear (red) 1-23 HDW-250...

  • Page 32: Cleaning When The Heads Are Clogged

    1-12-2. Audio Meter Brightness Adjustment To adjust the audio meter brightness, perform the follow- ing procedure. 1. Remove the screw and open the L SUB cover. 2. Insert the screwdriver tip into the hole for LCD contrast and adjust the LCD brightness. 1-24 HDW-250...

  • Page 33: Optional Accessories

    1-13. Optional Accessories 1-13-1. Optional Accessories Carrying case : HKDW-250 Battery : BP-L60A BP-90A AC adapter : AC-550, AC-DN2A Battery charger : BC-L100 Video cassette tape : BCT-HD series Camera remote controller : RM-B150 Memory label : MLB-1B-100 1-25 HDW-250...

  • Page 34: Tools For Adjustment

    Master Block (S2) J-7031-280-A S-tension Adjusting Table Adjusting the tension regulator J-7031-450-A END Sensor Positioning Tool Adjusting the positioning of parts J-7031-460-A Bit for Torque Driver (S:1.27) Fastening screws A-8319-485-A Memory Card Box, CDS-20 Assembly For updating software 1-26 HDW-250...
  • Page 35 Adjusting the video/audio system 8-960-076-11 Alignment tape HSR2-1A Adjusting the video tracking 9-911-053-00 Thickness Gauge Checking the clearance Commercially available Head Demagnetizer Demagnetizing head Blank Tape BCT-40HD Adjusting the tape running and Blank Tape BCT-124HDL adjusting the RF system 1-27 HDW-250...
  • Page 36 1-13. Optional Accessories 1-28 HDW-250...

  • Page 37: Error Messages And Error Logs

    Servo operation is stopped FUSE BLOWN The fuse in the camera power supply has blown BATTERY END The supply voltage has decreased and the operation cannot be implemented Replace the battery, and then turn on the main power again HDW-250...

  • Page 38: Error Logs

    AUDIO ERROR Deterioration in the quality of audio playback signal VIDEO ERROR Deterioration in the quality of video playback signal Refer to “A-1 Warning Display and Countermeasures” of Operation Manual for the measures against the warning displays when abnormality occurs. HDW-250...

  • Page 39: Maintenance Mode

    CHARACTER TYPE CHAR TYPE DISPLAY INFORMATION select DISP INFO CHAR WARNING DISPLAY at dual line mode CHAR WANG REMAIN TIME REMAIN TM VITC (NTSC) VITC (NTSC) VITC/NTSC VITC POSITION-1 select (NTSC) VITC POSI1 VITC POSITION-2 select (NTSC) VITC POSI2 HDW-250...
  • Page 40 ERROR LOG ERROR LOG RF CHECK RF CHECK CHANNEL CONDITION CHANNEL <LOAD/SAVE> LOAD LOAD <SAVE> SAVE SAVE <REMOTE> REMOTE REMOTE BAUD RATE BAUD CAMERA REMOTE CAM REMOT <SYSTEM> FREQUENCY FREQUENCY HD LINE HD LINE TRACKING AUTO TRACKING AUTO TRACK HDW-250...
  • Page 41 FLD : Picture freezes in the units of field. FRM : Picture freezes in the units of frame. The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. HDW-250...
  • Page 42 (including E-E mode). The LTC data that has already been recorded on tape, is output during the playback mode. The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. HDW-250...
  • Page 43 10 min : When the remaining amount of tape reaches 10 minutes or less, remaining amount of tape is displayed. The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. HDW-250...
  • Page 44 The VITC signal can be inserted into the two positions by setting the sub-menu item “VITC POSITION-1 select”. The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. HDW-250...
  • Page 45 A-ROUNDING A method to round off the 10-bit input signal to the 8-bit signal. Using this method, the step noise that can easily occur in the picture that includes the gentle slope. A-ROUNDING is a trademark of Sony Corporation. HDW-250...
  • Page 46 Finely adjusts the sync phase of the analog composite signal preset :0 that is output to the COMPOSITE connector. 1024 The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. HDW-250...
  • Page 47 The audio signal is played back by the level as it is recorded. VARIABLE : The playback level is adjusted by the AUDIO PB LEVEL knob. The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. HDW-250...
  • Page 48 OFF : Not selects the channel condition display by the DISPLAY button of display window operational buttons. The items that are surrounded by square ( [|] ) in the Setup value column, show the default setting when shipped from the factory. 3-10 HDW-250...
  • Page 49 Performs setting regarding remote control. REMOTE REMOTE 9PIN Sets which interface the REMOTE connector is used for. 9-PIN : The REMOTE connector is used as the Sony 9-pin protocol interface. ISR : The REMOTE connector is used as the ISR interface. BAUD...

  • Page 50: Diag Menu

    Change the data of the selected setup item by pressing the UP or DOWN button. Press the SET button to register and save the changed value. To return to the original value before change, press the DISPLAY button. 5. Exiting the DIAG menu Press the DIAG button to exit the DIAG menu. 3-12 HDW-250...
  • Page 51 ALL CLEAR <CANCEL EDIT> <DISP MODE> DISP TIME ERROR WARNING CONDITION <DATE> <TEST> <PROC> SYSTEM EE 525 TEST SG <TTP> <SERVO CHECK> <INPUT CHECK> <TENSION> <PLUNGER> <MOTOR/SENSOR> <ADJUST> <ADJUST> <NV RAM> <PATH> CTL PHS REC TEST CUE E TEST 3-13 HDW-250...
  • Page 52 Contents of the log that is issued. e : Error w : Warning c : Condition As many as 99 logs can be saved. When log exceeds 99, the oldest log (log No. 1) is deleted. The larger the log number, the newer the log is. 3-14 HDW-250...
  • Page 53 Internal test signal for down converter output OFF : Not output CB : 100 % Color Bar (DCP) RMP : Ramp TEN : Ten Step (DCP) MLT : MULTI BURST (DCP) PBR : PULSE & BAR (DCP) EXIT 3-15 HDW-250...
  • Page 54 REW button is pressed : Cassette compartment moves up. LOAD : ..... Cassette-down sensor 1 : Sensor is working 0 : Sensor is not working UNLOAD : 1 ..... Cassette-up sensor 1 : Sensor is working 0 : Sensor is not working 3-16 HDW-250...
  • Page 55 MVRAM CONTROL Saving the servo system adjustment data (Refer to Section “5-3. Servo System Adjustment” of Maintenance Manual Part 2 Vol. 1.) NVRAM INITIAL ....Initialization of adjustment data SV DATA SAVE ....Registration (saving) the servo data EXIT 3-17 HDW-250...
  • Page 56 B to Hch ....No signal 3AE : A, Ech ....2.9 MHz B to D, F to Hch ..No signal CUE E TEST Tests the CUE ERASE OFF : Normal operating mode ON : Test mode EXIT 3-18 HDW-250...

  • Page 57: Isr

    Compatible The HDW-250 has an ISR (Interactive Status Reporting) SETUP?; function. The status of the HDW-250 or the details of errors can be monitored and managed on the screen of a SETUP? #####; personal computer, and the data displayed on the screen SETUP #####;...

  • Page 59: Block Diagram And Circuit Description

    CPUs are built inside the CPUs so that external to the EQ-76 board. circuit is minimized. During the cue channel recording, the analog audio signals of channel 1 to channel 4 are mixed to form the cue signal. HDW-250...
  • Page 60 PG status so that it can control the drum and motors. The unit can be controlled from external equipment through the Sony 9-pin protocol or ISR. Power Supply System DC 12 V is supplied from a battery or through the DC IN connector.
  • Page 62 -60 / -20 / +4 MULTI- PLEXER OUT PUT AUDIO CH1 OUT CONV OUT PUT AUDIO CH2 OUT OUT PUT AUDIO CH3 OUT CONV OUT PUT AUDIO CH4 OUT ADA-44 HEADPHONES OUT PUT MULTI- SWITCH PLEXER EARPHONE CP-337 DUS-173 HDW-250...
  • Page 63 PB HEAD D VITERBI PB HEAD H AUDIO DATA DRUM ASSY PROCESS IC1108 IC1109 RATE CONV DPR-125 CUE HEAD EQ-76 VPR-53 Note : Refer to page 3-15 for the list of diagnostic menus for PROC. OVERALL (1/2) Block Diagram B-¥HDW250-BLOCK HDW-250...
  • Page 64 TAPE END SENSOR TENSION S-TENSION SENSOR TR-57 EPROM SRAM M1006 DRIVE REC CTL HEAD THREAD FG DET DET-15 THREAD UNTHREAD DET-26 MODE DET SE-510 CASSETTE UP SENSOR CASSETTE DOWN SENSOR CASSETTE IN SENSOR CS-25 CS-26 M1006 CASSETTE COMPARTMENT MOTOR HDW-250...
  • Page 65 MOTOR DRIVER CAPSTAN MOTOR CAPSTAN FG (A) SHAPER SHAPER CAPSTAN FG (B) T-REEL M1003 MOTOR DRIVER T-REEL MOTOR T-REEL FG DET M1005 S-REEL CASSETTE MOTOR DRIVER S-REEL MOTOR COMPARTMENT MOTOR DRIVER S-REEL FG DET OVERALL (2/2) Block Diagram SST-13 B-¥HDW250-BLOCK HDW-250...

  • Page 67: Periodic Maintenance And Inspection

    5. Check that the unit operates normally (recording or playback, etc.) and does not produce noise or malfunction. If the unit has a trouble, contact your local Sony Sales Office/Service Center. 5-2. Cleaning To keep the unit functioning optimally and to prolong the life of the unit and tape, perform maintenance regularly.

  • Page 68: General Information For Cleaning Using A Cleaning Cloth

    3. Check to see that the heads are not dirty. If the heads are still dirty even after using the cleaning cassette tape, clean using a cleaning cloth. (Refer to Section 5-2-3.) HDW-250...

  • Page 69: Cleaning The Tape Running Surface Of The Upper Drum And Video Heads

    If the upper drum is cleaned in the vertical direction, it may damage the video heads. 3. After cleaning, wipe the rotary heads using a dry cleaning cloth. Cleaning cloth Video heads Video heads Upper drum tape running surface HDW-250...

  • Page 70: Cleaning The Tape Running Surface Of The Lower Drum And Lead Surface

    3. After cleaning, wipe the tape running surface of the lower drum and the lead surface using a dry cleaning cloth. Bamboo Cleaning cloth Lead surface Tape running surface of the Lead surface lower drum HDW-250...

  • Page 71: Cleaning The Stationary Heads

    If magnetic powder or other materials are attached to the head gaps of the FE head, CTL head and CUE/TC head, an error may occur during recording or playback. Remove any magnetic powder completely. 2. After cleaning, wipe the stationary heads using a dry cleaning cloth. CTL head FE head CUE/TC head HDW-250...

  • Page 72: Cleaning The Tape Running System And Tape Cleaner

    3. After cleaning, wipe the tape running system and tape cleaner using a dry cleaning cloth. Capstan Tape cleaner S3 tape guide T4 tape guide S5 (tension regulator) tape guide T1 tape guide T2 tape guide S2 tape guide S1 tape guide Pinch roller T3 (T-drawer) tape guide S4 (S-drawer) tape guide HDW-250...

  • Page 73: Cleaning The Fan Motor

    2. Clean the blades of the fan motor using the swab moistened with cleaning fluid. 3. Reattach the fan cover. Bottom panel Fan motor Fan cover Screws (B2.6 x 4) Screws (B2.6 x 4) Air outputs Left panel Fan motors Air inlets HDW-250...

  • Page 74: Periodic Check

    To keep the unit functioning optimally and to prolong the life of the unit and tape, perform periodic checks regularly. 5-3-1. Hours Meter In the HDW-250, an hours meter can be displayed on the LCD of the front panel. Use this as a reference to perform the periodic check regularly. 1. Display procedure (1) Press the DIAG button of the front panel using the tip of a clip, etc.
  • Page 75 Replace every 10,000 times of threading ST driving gear 3-691-352- T limiter spring Replace every 10,000 times of threading T limiter spring 3-689-899- ! 1-767-156-11 Lithium battery Replace every two years Lithium battery “R” indicates the period between replacing parts. HDW-250...

  • Page 77: Spare Parts

    Therefore, specified parts should be used in the case of replacement. 2. Standardization of Parts Some repair parts supplied by Sony differ from those used for the unit. These are because of parts common- ality and improvement. Parts list has the present standardized repair parts.

  • Page 78: Exploded Views

    A-8316-736-B s DRUM ASSY, DHH-04A-R A-8269-452-A o ARM ASSY, S X-3949-109-1 s ROLLER ASSY, AHC A-8322-697-A s REGULATOR ASSY, TENSION 1-454-334-51 s SOLENOID, PLUNGER 1-454-607-21 s SOLENOID, PLUNGER 3-172-003-01 s BELT, DRIVING 8-825-779-72 s CTL HEAD (PS244-21D) 3-615-320-01 o CAP, CR HDW-250...
  • Page 79 X-3605-481-1 o SUB ASSY, T ARM X-3678-425-5 s ARM ASSY, PINCH ROLLER 1-454-334-51 s SOLENOID, PLUNGER A-8278-216-A o PLUNGER ASSY, PINCH PRESSING 3-172-003-01 s BELT, DRIVING 3-681-778-02 s BRUSH, CUE 8-825-920-02 s HEAD, AUDIO EPS244-2103J 8-835-440-01 s MOTOR DN20-Q7Z1B 8-835-534-01 s MOTOR, DC SCV-0702A/J-N HDW-250...
  • Page 80 A-8276-930-A o MOUNTED CIRCUIT BOARD, ADA-44 A-8276-948-A o MOUNTED CIRCUIT BOARD, KY-315 A-8321-342-A o MOUNTED CIRCUIT BOARD, DUS-173 A-8321-355-A o MOUNTED CIRCUIT BOARD, CC-82 A-8321-356-A o MOUNTED CIRCUIT BOARD, CP-337 A-8321-357-A o MOUNTED CIRCUIT BOARD, FU-76 A-8321-358-A o MOUNTED CIRCUIT BOARD, DET-36 HDW-250...
  • Page 81 A-8321-709-A o MOUNTED CIRCUIT BOARD, DPR-125 A-8321-710-A o MOUNTED CIRCUIT BOARD, VPR-53 A-8321-887-A o MOUNTED CIRCUIT BOARD, TX-68A A-8321-889-A o MOUNTED CIRCUIT BOARD, RX-46A A-8321-959-A o MOUNTED CIRCUIT BOARD, DCP-22 A-8322-042-A s POWER ASSY ! 1-767-156-11 s IC M4T28-BR12SH1 HDW-250...
  • Page 83 The material contained in this manual consists of information that is the property of Sony Corporation. Sony Corporation expressly prohibits the duplication of any portion of this manual or the use thereof for any purpose other than the operation or maintenance of the equipment described in this manual without the express written permission of Sony Corporation.
  • Page 84 Printed in Japan Sony Corporation HDW-250 (UC) E 1999. 9 16 3-203-024-01 Broadcasting & Professional Systems Company ©1999...

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