Hitachi DV-P755U Service Manual
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Hitachi DV-P755U Service Manual

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TK
No. 0501E
DV-P755U
SERVICE MANUAL
DO NOT RESELL OR DIVERT IMPROPERLY.
DO NOT RESELL OR DIVERT IMPROPERLY.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

DVD PLAYER

April
2005
Digital Media Division, Yokohama

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  • Page 1: Dvd Player

    No. 0501E DV-P755U SERVICE MANUAL DO NOT RESELL OR DIVERT IMPROPERLY. DO NOT RESELL OR DIVERT IMPROPERLY. SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT DVD PLAYER April 2005 Digital Media Division, Yokohama...

  • Page 2: Table Of Contents

    CONTENTS 1 CAUTION FOR SAFETY IN PERFORMING 5 EXPLODED VIEW AND PARTS LIST ..5-1 REPAIR ....... 1-1 5-1 EXPLODED VIEW .

  • Page 3: Caution For Safety In Performing

    CAUTION FOR SAFETY IN PERFORMING REPAIR 1-1 LASER BEAM SAFETY PRECAUTIONS This DVD player uses a pickup that emits a laser beam. Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

  • Page 4: Important Safety Precautions

    1-2 IMPORTANT SAFETY PRECAUTIONS 1-2-1 Product Safety Notice Also check areas surrounding repaired locations. J. Be careful that foreign objects (screws, solder Some electrical and mechanical parts have special droplets, etc.) do not remain inside the set. safety-related characteristics which are often not K.

  • Page 5: Safety Check After Servicing

    1-2-3 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, and wires have been returned to their original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards. 1.

  • Page 6: Standard Notes For Servicing

    1-3 STANDARD NOTES FOR SERVICING General Note: "CBA" is an abbreviation for 1-3-4 Instructions for Handling "Circuit Board Assembly." Semi-conductors Electrostatic breakdown of the semi-conductors may 1-3-1 Circuit Board Indications occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 1.

  • Page 7: General Information

    GENERAL INFORMATION 2-1 SPECIFICATIONS Item Description Output signal format NTSC color 75 Ω Video output impedance Video output level 1.0 V p-p Audio output level 2.0 Vrms Video S/N ratio 60 dB or more Disc used DVD video disc, Music CD disc DVD section DVD (linear audio) 20 Hz - 22 kHz (48 kHz sampling frequency)

  • Page 8: Comparison Of Models

    2-2 COMPARISON OF MODELS O: Yes, ---: No, : Same as on left Item DV-P755U DV-P543U DVD/VCD/SVCD/CD-DA O / --- / --- / O CD-R/CD-RW/DVD-R (Video Format) O / O / O DVD-RAM/DVD-RW --- / O (Video Mode) MP3/WMA O / ---...

  • Page 9: Comparison Of Main Control Ics

    2-3 COMPARISON OF MAIN CONTROL ICS ---: No, : Same as on left Item DV-P755U DV-P543U NC7SB3157P6X / SN74LVC1G3157DCKR (IC201) SN74LVC1G3157DCKR (IC201) OP AMP LM324PWR / LM324PT (IC202) BA5888FP-E2 / SA5694G / SA5694 / FAN8024CDTF / SERVO DRIVE FAN8024CDTF-NL / SA5624G / SA5694 /...

  • Page 10: List Of Abbreviations And Terms For Dvd Player

    2-4 LIST OF ABBREVIATIONS AND TERMS FOR DVD PLAYER Index Abbreviation/Term Explanation See Dolby AC3. CD-R One type of DVD standard disc, to which writing once is possible (recordable type) CD-RW One type of CD standard disc, to which writing up to 1000 times is possible Component video Used for outputs of HDTV video signal format.

  • Page 11: Operating Controls And Functions

    2-5 OPERATING CONTROLS AND FUNCTIONS FRONT PANEL 3 4 5 REAR VIEW / I (POWER/STANDBY) 9. MAIN (AC Power Cord) Connect to a standard AC outlet. Switch the player to ON or OFF. 10. COAXIAL (Digital audio out) (As to the indication of the Operate switch, “I” indicates ON and “...
  • Page 12 Press to call up the title menu (DVD). Press to return to the top file of the highest hierarchy in the program and file list (MP3). 23. AUDIO Press to select a desired audio language or sound HITACHI mode. 24. DISPLAY DV-RM755U Press to access or remove the display screen during DVD or Audio CD playback.

  • Page 13: Maintenance And Inspection

    MAINTENANCE AND INSPECTION 3-1 TROUBLESHOOTING Troubleshooting is how to service for the specifying malfunction or poor parts. Detect malfunction or poor parts and service as the following charts. FLOW CHART NO.1 The power cannot be turned on. Is the fuse normal? See FLOW CHART No.2 <The fuse blows out.>...
  • Page 14 FLOW CHART NO.6 P-ON+9V (EV+10V) is not outputted. Is 10V voltage supplied to the emitter of Q1002? Check D1030, D1048, C1035, C1048, L1009, and the periphery circuit, and service it if defective. Check Q1016 and PWRCON line and service it if Is the voltage of base on Q1002 lower than the defective.
  • Page 15 FLOW CHART NO.11 The fluorescent display tube does not light up. Is 3.3V voltage supplied to Pins(6,24) of IC2001? Check the EV+3.3V line and service it if defective. Is the voltage of approximately -20V supplied to Check the -FL (-20V) line and service it if defective. Pin(15) of IC2001? Is there 500kHz oscillation at Pin(26) of IC2001? Check R2002, IC2001 and their periphery, and...
  • Page 16 FLOW CHART NO.14 The disc tray cannot be opened and closed. (It can be done using the remote control unit.) Replace the "OPEN/CLOSE" button (SW2108). Is the normal control voltage inputted to Pin(4) of IC2001? Refer to "FLOW CHART NO.12" <The key operation is not functioning.>...
  • Page 17 FLOW CHART NO.19 Both functions of picture and sound do not operate normally. Replace the DVD Main CBA. No improvement can be found. Original DVD Main CBA is poor. Replace the DVD Mechanism. FLOW CHART NO.20 Picture does not appear normally. Set the disc on the disc tray, and playback.
  • Page 18 FLOW CHART NO.21 Audio is not outputted normally. Set the disc on the disc tray, and playback. Replace the DVD Main CBA or DVD Mechanism. Are the analog audio signals outputted to each pin of CN1601 on AV CBA? CN1601 13PIN AUDIO(L) CN1601 15PIN AUDIO(R) Check each line between each pin of CN1601 Are the analog audio signals inputted to each pin...

  • Page 19: How To Initialize The Dvd Player

    3-2 HOW TO INITIALIZE THE DVD PLAYER To put the program back at the factory-default, initialize the DVD player as the following procedure. 1. Press [1], [2], [3], [4], and [DISPLAY] buttons on the remote control unit in that order. Fig.

  • Page 20: Firmware Renewal Mode

    3-3 FIRMWARE RENEWAL MODE 3-3-1 How to Update the Firmware The appearance shown in (*1) of Fig. 5 is described as follows: Version Appearance State Note: If the firmware has been changed, etc., we will Reading... Sending files into the memory use Service News, etc.

  • Page 21: How To Verify The Firmware Version

    10. Press [CLEAR C.REST] button on the remote control unit. Fig. 10 appears on the screen. " ******* " differ depending on the models. MODEL : ******* Version : *.** Region : * EEPROM CLEAR : OK EEPROM CLEAR : CLEAR EXIT: POWER Fig.

  • Page 22: Disassembly

    DISASSEMBLY 4-1 CABINET DISASSEMBLY INSTRUCTIONS 4-1-1 Disassembly Flowchart About tightening screws When tightening screws, tighten them with the This flowchart indicates the disassembly steps to gain following torque. access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and Screws Torque dress the cables as they were originally.
  • Page 23 (S-2) [1] Top Case (S-1) (S-2) [3] Reinforce Plate Fig. D1 Fig. D3 (S-3A) (L-1) FCC Cover (S-3B) CN201 (L-3) CN601 CN301 CN401 [4] DVD Main (L-1) (L-2) [2] Front Assembly Fig. D2 Short the three short lands by soldering. (Either of two places.) View for A Connector...

  • Page 24: How To Eject Manually

    [7] Function CBA [5] DVD Mechanism (S-4) [6] AV CBA (S-4) (S-5) CN2001 (S-4) (S-6) (L-4) Fig. D5 Fig. D6 4-1-3 How to Eject Manually 1. Turn the unit over. 2. Insert the shaft less than a diameter of 3 mm (e.g. screwdriver) straightly into the opening as shown. 3.

  • Page 25: Exploded View And Parts List

    EXPLODED VIEW AND PARTS LIST 5-1 EXPLODED VIEW Note: Components without any numbers in exploded views had not been assigned as service parts 3 x 10 as of the date of issue of this manual. 3 x 10 M3 x 8 3 x 10 M3 x 8 3 x 11...

  • Page 26: Replacement Parts List

    5-2 REPLACEMENT PARTS LIST Note: Products marked with a # have special characteristics important to safety. 5-2-1 Mechanical Parts List SYMBOL-NO P-NO DESCRIPTION SYMBOL-NO P-NO DESCRIPTION MECHANISM SECTION TJ18681 FRONT ASSEMBLY TJ16981 FOOT(REAR) TJ18582 TOP CASE(V2) # AC1001 TE15463 AC CORD TJ18583 DVD MECHA TJ17579...

  • Page 27: Electrical Parts List

    Note: Although some parts in the schematic diagrams have different names from 5-2-2 Electrical Parts Lis those in the parts list, there is no problem in replacing parts. SYMBOL-NO P-NO DESCRIPTION SYMBOL-NO P-NO DESCRIPTION SEMI-CONDUCTORS TRANSFORMER D1001 TC10752 DIODE 1N4005 # T1001 TJ18595 PULSE TRANS CGS-SW0078A...

  • Page 28: Appendix

    APPENDIX 6-1 SYSTEM CONTROL TIMING CHARTS Tray Close ~ Play / Play ~ Tray Open Tray Disc Disc Tray Play Close Rotation Stop Open 3.3V Tray IN (TL221 on the DVD Main CBA Unit) Sled Drive 1.65V (TP303 on the DVD Main CBA Unit) Disc Drive 1.65V...

  • Page 29: Ic Pin Function Descriptions

    6-2 IC PIN FUNCTION DESCRIPTIONS IC2001 (FRONT PANEL CONTROL) Signal Function Name IN FP-CLK Clock Input IN FP-STB Serial Interface Strobe IN K1 Key Data 1 Input IN K2 Key Data 2 Input Power Supply Segment Output / Key OUT a / KEY-1 Source-1 Segment Output / Key OUT b / KEY-2...

  • Page 30: Lead Identifications

    6-3 LEAD IDENTIFICATIONS KRA110M 2SA1015-Y(TPE2) 2SK3498 KTA1267(Y) 2SC2120-Y(TPE2) KTC3199(GR) KTA1266(Y) KTC3198(Y) KTC3203(Y) G D S E C B E C B KIA4558P/P PT6313-S-TP(L) FAN431AZXA RC4580IP SC16313(G) KIA431-AT UTC4558 K A R EL817B EL817C LTV-817B-F MM1622XJBE LTV-817C-F LD1117SC-R PS2561A-1(W) Note: A: Anode 1: GND K: Cathode 2: Vout...

  • Page 31: Sschematic, Wiring Diagrams

    SCHEMATIC, WIRING DIAGRAMS S-1 Schematic Diagrams / CBA’s and Test Points Standard Notes Notes: 1. Do not use the part number shown on these WARNING drawings for ordering. The correct part number is shown in the parts list, and may be slightly Many electrical and mechanical parts in this chassis different or amended since these drawings were have special characteristics.
  • Page 32 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: For continued protection against fire hazard, replace only with the same type fuse. ATTENTION: Pour une protection continue les risqes d'Incele n'utiliser que des fusible de même type.

  • Page 33: Wiring Diagram

    S-2 Wiring Diagram DIGITAL AUDIO OUT VIDEO-Y VIDEO-Cb/Pb VIDEO-Cr/Pr VIDEO OUT AUDIO(L)- AUDIO(R)- S-VIDEO AC CORD (COAXIAL) (COMPOSITE) CN2001 CN2101 AV CBA FUNCTION CBA KEY-2 KEY-3 KEY-1 KEY-4 CN2101 is soldered directly to the PCB. CN1001 CN1601 (CN1001 is soldered directly to the PCB.) (CN1601 is soldered directly to the PCB.) CN401 CN601...

  • Page 34: Dvd Main 1/3 Schematic Diagram

    S-3 DVD Main 1/3 Schematic Diagram 1 NOTE: Either IC461 or IC462 is used for DVD MAIN CBA.

  • Page 35: Dvd Main 2/3 Schematic Diagram

    S-4 DVD Main 2/3 Schematic Diagram...

  • Page 36: Ic101 Voltage Chart

    S-5 IC101 Voltage Chart ~ : Voltage is not consistent ----- : Not used Unit : Volts PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP PIN.NO PLAY STOP ----- -----...

  • Page 37: Dvd Main 3/3 Schematic Diagram

    S-6 DVD Main 3/3 Schematic Diagram...

  • Page 38: Av 1/3 Schematic Diagram

    S-7 AV 1/3 Schematic Diagram CAUTION ! For continued protection against fire hazard, replace only with the same type fuse. CAUTION ! ATTENTION : Pour une protection continue les risqes Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. NOTE: d'Incele n'utiliser que des fusible de même type.

  • Page 39: Av 2/3 Schematic Diagram

    S-8 AV 2/3 Schematic Diagram...

  • Page 40: Av 3/3 & Function Schematic Diagram

    S-9 AV 3/3 & Function Schematic Diagram FL2001 MATRIX CHART SACD REPEAT TITLE GROUP PSCAN SACD PSCAN REPEAT HD VCD GROUP TITLE S-10...

  • Page 41: Waveforms

    S-10 Waveforms Pin 8 of CN1601 Pin 15 of CN1601 AUDIO(R) AUDIO(R) 0.5ms 0.5ms VIDEO-Y VIDEO-Y 0.1V 0.1V 20µs Pin 10 of CN1601 Pin 18 of CN1601 VIDEO-C VIDEO-C 0.1V 0.1V 20µs SPDIF SPDIF 0.1µs C1402 PLUS LEAD NOTE: Input CD: 1kHz PLAY (WF4~WF6) DVD: POWER ON (STOP) MODE...

  • Page 42: Ccircuit Board Diagrams

    CIRCUIT BOARD DIAGRAMS C-1 AV CBA Top View CAUTION ! CAUTION ! NOTE: For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using replace only with the same type fuse.

  • Page 43: Av Cba Bottom View

    C-2 AV CBA Bottom View CAUTION ! CAUTION ! NOTE: For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using replace only with the same type fuse.

  • Page 44: Function Cba Top/Bottom View

    C-3 Function CBA Top/Bottom View FUNCTION CBA Top View FUNCTION CBA Bottom View...

  • Page 45: Bblock Diagrams

    BLOCK DIAGRAMS B-1 System Control / Servo Block Diagram...

  • Page 46: Digital Signal Process Block Diagram

    B-2 Digital Signal Process Block Diagram...

  • Page 47: Video/Audio Block Diagram

    B-3 Video / Audio Block Diagram...

  • Page 48: Power Supply Block Diagram

    B-4 Power Supply Block Diagram...
  • Page 49 No. 0501E Digital Media Division, Yokohama DV-P755U...

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