Orion DTV2784 Service Manual
  1. Manuals
  2. Brands
  3. Orion Manuals
  4. TV Receiver
  5. DTV2784
  6. Service manual

Orion DTV2784 Service Manual

Color television receiver
Hide thumbs
Table of Contents

Advertisement

Quick Links

SERVICE MANUAL
COLOR TELEVISION RECEIVER
DTV2784
All the specifications and features are subject to change without notice.
S/M CODE NO. M3W4062ASM
ORIGINAL
DATE OF ISSUE 02/2006
VERSION (A)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DTV2784 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Orion DTV2784

Summary of Contents for Orion DTV2784

  • Page 1 SERVICE MANUAL COLOR TELEVISION RECEIVER DTV2784 All the specifications and features are subject to change without notice. S/M CODE NO. M3W4062ASM ORIGINAL DATE OF ISSUE 02/2006 VERSION (A)

  • Page 2: Important Service Safety Information

    IMPORTANT SERVICE SAFETY INFORMATION Operating the receiver outside of its cabinet or with its Before returning the receiver to the user, perform the back removed involves a shock hazard. Work on following safety checks: these models should only be performed by those who Inspect all lead dress to make certain that leads are are thoroughly familiar with precautions necessary not pinched or that hardware is not lodged between...

  • Page 3: About Lead Free Solder (Pbf)

    ABOUT LEAD FREE SOLDER (PbF) Distinction of PbF PCB: PCBs (manufactured) using lead free solder will have a PbF printing on the PCB. (Please refer to figures.) Caution: • Pb free solder has a higher melting point than standard solder; Typically the melting point is 86°F~104°F(30°C~40°C) higher.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS IMPORTANT SERVICE SAFETY INFORMATION ................... A1-1 ABOUT LEAD FREE SOLDER (PbF) ....................... A1-2 TABLE OF CONENTS ............................A2-1 GENERAL SPECIFICATIONS .......................... A3-1~A3-4 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ........................B1-1 2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..............B2-1, B2-2 SERVICE MODE LIST ............................

  • Page 5: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 27 inch / 676.0mmV SYSTEM CRT Type Normal Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2Speaker Position Front Size 2.0 x 3.5 Inch Impedance Sound Output 1.0 + 1.0 W 10%(Typical) NTSC3.58+4.43 /PAL60Hz Tuning Broadcasting System Analog...
  • Page 6 Timer Back-up (at Power Off Mode) more than Unit RC-KL G-10 Remote Control Glow in Dark Remocon Format Remocon Format Orion Custom Code 86-05 h Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys 27 Keys Keys...
  • Page 7 Auto Degauss Auto Shut Off Canal+ Cable(CATV) Anti-theft Rental Memory(Last CH) Memory(Last Volume) V-Chip (Analog & Digital) Type USA, ORION Type Auto Search CH Allocation Tone Control Just Clock Function Game Position CH Label VM Circuit Full OSD Premiere Comb Filter...
  • Page 8 Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces Height (cm) Container Stuffing Sets/40' container G-17 Material Cabinet Cabinet Front PS 94V0 DECABROM Cabinet Rear PS 94V0 DECABROM Non-Halogen Demand Eyelet Demand G-18 Environment Environmental standard requirement (by buyer) Green procurement of ORION Pb-free Phase3(Phase3A) A3-4...

  • Page 9: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 1. REMOVAL OF ANODE CAP remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.

  • Page 10: Removal And Installation Of Flat Package Ic

    DISASSEMBLY INSTRUCTIONS REMOVAL AND INSTALLATION OF When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using FLAT PACKAGE IC a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 2-3.) REMOVAL NOTE Put Masking Tape (cotton tape) around the Flat Package...
  • Page 11 DISASSEMBLY INSTRUCTIONS INSTALLATION When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- Take care of the polarity of new IC and then install the tip Soldering Iron. (Refer to Fig. 2-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 12: Service Mode List

    SERVICE MODE LIST This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 2 seconds. Set Key Remocon Key Operations Releasing of V-CHIP PASSWORD.
  • Page 13 WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. +9 +A +B +C +D +E +F C1 A2 4D 1A 05 AA 00 00 D0 02...

  • Page 14: Re-Write For Digital Soft Firmware

    RE-WRITE FOR DIGITAL SOFT FIRMWARE JG198 JG199 Flash UP-Date Soft JG176 USA SD DTV ROM Serial Communication Disc DISC Change JIG Ref. No. Part No. Parts Name Remarks Serial Communication JG198 APJG198000 Connect the set to personal computer Change JIG APJG199000 JG199 Flash UP-Date Soft Disc...

  • Page 15: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE FUNCTION FUNCTION OSD H Read and perform these adjustments when repairing the CONT.CENT OSD C CONT.MAX circuits or replacing electrical parts or PCB assemblies. CUT OFF CONT.MIN H.POSI COL.CENT CAUTION H BLK L COL.MAX H BLK R COL.MIN Use an isolation transformer when performing any •...
  • Page 16 ELECTRICAL ADJUSTMENTS 2-5: BRIGHT CENT Receive the monoscope pattern. (RF Input) Set the screen mode to FULL. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and “A” press the channel button (17) on the remote control to select "BRI CENT".
  • Page 17 ELECTRICAL ADJUSTMENTS 2-10: HORIZONTAL SIZE 2-14: TRAPEZIUM Receive the monoscope pattern. Receive the crosshatch signal from the Pattern Generator. Using the remote control, set the brightness and Using the remote control, set the brightness and contrast contrast to normal position. to normal position.
  • Page 18 ELECTRICAL ADJUSTMENTS 2-18: Confirmation of Fixed Value (Step No.) Please check if the fixed values of each adjustment item is set correctly referring below. FUNCTION DIGITAL OSD C H BLK L H BLK R VS CORR V COMP BRI.MAX BRI.MIN CONT.CENT CONT.MIN COL.MAX...
  • Page 19 ELECTRICAL ADJUSTMENTS 3. PURITY AND CONVERGENCE 3-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.
  • Page 20 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB CD804 TP024 R805 CP804 R803 TP022 S801 J801 CP802B CP801B CD801 CD802 CP801A J702 J701 J708 J704 CD1001 FB401 SPEAKER CP401 TP003 VR401 CP1001 W002 VR502 CP802A CP502 AC IN CD501 S502...

  • Page 21: Troubleshooting Guide

    TROUBLESHOOTING GUIDE NO POWER Is the voltage at the point (A) Is the voltage at pin G Check Q514 and associated circuit. in the Figure DC159.4V ? of Q502 DC5V ? Check Q502 and associated circuit. T501 Broken wire of R501 or short circuit Is the voltage at the point (B) in the Figure DC164V ? on GND.
  • Page 22 TROUBLESHOOTING GUIDE NO RASTER Does the RASTER Is the voltage of pin 1 of Check the output circuit and appear at maximum CP801 DC180V ? associated circuit. BRIGHT/CONTRAST ? Check the 180V line. Is the high voltage of Is the heater voltage at Contact defects of CRT or CRT ANODE 27KV~28KV ? pin 10 of J801 AC6.4V ?
  • Page 23 TROUBLESHOOTING GUIDE NO COLOR Are the waveform at pins 6, Defect of CRT or contact defects 8 and 11 of J801 normal ? of J801. Are the waveform at pins 3, Check the output circuit and 4 and 5 of CP802 normal ? associated circuit.
  • Page 24 TROUBLESHOOTING GUIDE NO VERTICAL Is the waveform at pin Check DY. 6 of CP401 normal ? Is the waveform at pin Check the circuit from pin 2 of 2 of IC401 normal ? IC401 to CP401. Is the waveform at pin 5 Is the voltage at pin 6 Check IC401 and check associated of IC401 normal ?
  • Page 25 TROUBLESHOOTING GUIDE NO SOUND Is sound setting appropriate ? Is the waveform at pins 2,4, Check speaker. 10 and pin 12 of IC1001? Is the AUDIO signal at pins Check IC701 and associated circuit . 11 and 15 of IC701? Is the AUDIO signal input Check the pins 2, 4 of IC701 and at pins 1, 3, 5~9 and 13 of...

  • Page 26: Ic Descripion

    IC DESCRIPTION OEC7144A (IC101) Pin name Symbol Logic Function Option When unused VHOLD V.HOLD_MAIN Condenser of slicer. HLF_MAIN Filter of slicer. P94/SCL3/RxD2 SCL1 IIC BUS(1) CLOCK output. C-MOS P93/SDA3/TxD2 SDA1 IIC BUS(1) DATA I/O. C-MOS P92/TB2/DIGR0 YUV-H SW COMPONENT C-MOS OPEN P91/TB1 Not used.(L output)
  • Page 27 IC DESCRIPTION OEC7144A (IC101) Pin name Symbol Logic Function Option When unused 48 P46/CS2 Not used. C-MOS OPEN 49 P45/CS1 Not used. C-MOS OPEN 50 P44/CS0 Not used. C-MOS OPEN 51 P43/A19 AUDIO MUTE Volume MUTE output. C-MOS OPEN 52 P42/A18 Not used.

  • Page 28: Semiconductor Base Connections

    SEMICONDUCTOR BASE CONNECTIONS DIODE RD47FBD-3 1N4002-PAN 1N4005-EIC RB085T-40 ENE271D-10A 1SS133T-77 1N4937-PAN 21DQ09N-TA2B1 AU02A-EIC RM11C-EIC DSS-272M-S00B SB140-EIC ERD07-15L50 FE201-6L49 MTZJ10B-EIC MTZJ15B-EIC MTZJ18B-EIC MTZJ2.2B-EIC MTZJ3.3B-EIC MTZJ3.9B-EIC MTZJ33B-EIC MTZJ5.6B-EIC MTZJ6.2B-EIC MTZJ8.2B-EIC MTZJ9.1B-EIC CAS-220/CS HY5DU561622DTP-D43 CS4345-CZZ AT24C128N-10SU-1.8 PST3229NR LA76327M-MPB-E NJM2750M(TE1) TC7W66FU(TE12L,F) LA7847-E BA7810T-V5 OEC7144A AN17822A SST39VF1681-70-4C-EKE TRANSISTOR...

  • Page 29: Power

    MICON/CHROMA BLOCK DIAGRAM CHROMA IC IC601 LA76327M-MPB-E FB401 COMB Y J801 COMB C Q802, Q806 BLUE OUT B OUT Q803, Q805 VIDEO1 G OUT GREEN OUT AUDIO IN(L) LINE1(REAR) Q801, Q804 J701 V801 AUDIO IN(R) R OUT RED OUT V-OUT IC VIDEO IN1 IC401 LA7847-E V OUT...
  • Page 30 SD DIGITAL MODULE BLOCK DIAGRAM X2401 24.576MHz IC2408 16Mbit NOR FLASH SST39VF1681-70-4C-EKE RESET +3.3V IC2401 SD_DTV ASIC I2C1_CLK ZR39640BGCG-B1 I2C1_DATA F/E_RESET TS_DATA TS_CLK TS_FRAME IC2402 8VSB/QAM/BTSC DEMOD. +2.6V TS_DVALID CAS-220/CS ADATA BCLK +3.3V IC2501 AUDIO DAC CS4345-CZZ...

Table of Contents