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Beko DPM 28 C7 Service Manual

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Service Manual
C7-C8 Chassis
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Summary of Contents for Beko DPM 28 C7

  • Page 1 Service Manual C7-C8 Chassis...
  • Page 2 CONTENTS PAGE Safety Instructions Technical Specifications Special Features Remote Control Preperations Operating the TV IC Datasheets&Specs Pin Voltages of IC’s Electrical and Service Adjustments Channel Frequency Tables Part List Circuit Diagrams Attached - 2 -...

  • Page 3: General Guidelines

    1. SAFETY INSTRUCTIONS and each exposed metallic cabinet part on GENERAL GUIDELINES the receiver, such as screw heads, aerials, connectors, control shafts etc. When the 1. It is advised to insert an isolation transformer exposed metallic part a return path to the in the AC supply before servicing a hot chassis the reading should be between chassis.

  • Page 4: Special Features

    Television Thank you for buying this television which is designed to give you many years of satisfactory service. You may already be familiar with using a television but do please take time to read these instructions. They are designed to familiarise you with the unit’s many new features and to ensure you get the very best out of your purchase.

  • Page 5: Safety Is Important

    Safety is Important Your safety and the safety of others is important. Please, therefore, ensure you read the Safety instructions before you operate this television. Safety instructions Read all the safety instructions before first use of your TV. • Position the television so that direct light does not fall on the screen.

  • Page 6: Getting Started

    Getting started Please Note Remove your Television carefully When not in use disconnect the plug from the box. You may wish to from the mains power supply. store the packaging for future use. Press the Power button on the front of the TV. The In the box standby indicator will illuminate.

  • Page 7: Control Unit

    Control Unit Front Panel Program Down/Up button Volume Down/Up button. General Program ON/OFF switch Stand by (Depends on model) Stand by indicator External Connections: (Front or side) (External connections: (Rear) AV1 scart Right audio RCA (Red) AV2 scart Left audio RCA/Mono RCA (White) AV3 scart (optional) Video RCA (Yellow) S-Video connection...

  • Page 8: External Connections Table

    External connections table Picture tube 25” 26” 28” 28” 29” 32” 33” size/typee 16:9 16:9 16:9 AV1 Scart STD. STD. STD. STD. STD. STD. STD. STD. STD. STD. STD. STD. AV2 Scart STD. STD. AV3 Scart OPT. OPT. OPT. OPT. OPT.

  • Page 9: Using The Tv

    Using the TV Mute TV controls To mute the sound press the Mute button on the remote control. A Programme selection loudspeaker symbol will appear on Press the Program up or Program the screen. down buttons on the TV or remote control or press a Numeric button Press the Mute button again to to select a programme.

  • Page 10: Tuning The Television

    Press the AVbutton again to return In the Setup menu select PROG to TV. NO and change to P1 using the Program down button to select it and the Volume up Tuning the television button to change it. There are two ways of tuning your television: Manual, where you control the tuning process Starting with Program 1, tune in the first channel as follows:...
  • Page 11 Use the Program down button to Tuning with channel numbers Enter the SETUP menu by pressing select AUTOPROGRAM and the blue button. press the OK button. A list of countries will appear. Select Press the OK button to enter the the desired country using CHANNEL row.

  • Page 12: Program Table

    Program Table Once you have tuned in all the channels you Please Note want, you can change their programme Some TV channels may send their names with teletext transmission. In this number, if required, and name them. case their names will be automatically To enter the PROGRAM TABLE shown on the name line.

  • Page 13: Nicam Stereo

    Volume TV set up Sets default volume using the Volume up The TV set up is accessed through a menu and down buttons. system. To save your settings, select STORE and press the OK button. Once you have stored your set up, this is the STORED will be displayed.
  • Page 14 Sound mode Dynamic Bass (optional) You can select NORMAL, SPATIAL or DOLBY VIRTUAL (optional)using the Set DYNAMIC BASS to ON if you Volume up/down buttons or mix button. wish to deepen the bass sound specifically. SPATIAL sound is an ‘expanded stereo’. It gives the impression that the two speakers in the TV are further apart than they really are.
  • Page 15 Equalizer Picture menu (Green button) EQUALIZER PICTURE MUSIC BRICGHTNESS SPORTS CONTRAST CINEMA COLOUR SPEECH SHARPNESS USER COLOUR TEMPERATURE STORE BACK BACK In this menu are a series of preset equalizer The picture menu allows you to set up the settings for different types of sound output. following: There are five music settings - MUSIC, BRIGHTNESS...
  • Page 16 Language Select BRIGHTNESS, There are many languages available for the On CONTRAST, COLOUR and Screen Displays (OSD). SHARPNESS using the Program up/down buttons. Press the OK button to select the language list. Change the settings with the Volume up/down buttons. Press the Program down button to page through all the languages and To save your settings, select STORE...
  • Page 17 4:3 Sets: Picture format This allows you to select the picture size on 4:3, is the screen format of 25”, 28”, 29” corresponding to the scren type widescreen and 33” TV sets But you can change of your TV: the picture format to 16:9 to able Avaible formats for widesereen TV sets are to watch the inputs in 16:9 format, i.e.

  • Page 18: Using Teletext

    Using Teletext Teletext is an information system that displays TV/text mix text on your TV screen. Using the teletext To view a page of text whilst control buttons you can view pages of watching a TV programme press information that are listed in the teletext button.
  • Page 19 Page hold To reveal information If the page of text you have selected Press the Rev button to reveal contains sub pages, these sub pages concealed information (quiz answers etc.). will automatically be displayed in order with a delay to allow you to read the page.

  • Page 20: Connecting External Equipment

    Connecting external equipment Headphones (optional) Please note: You can connect a RGB external equipment The headphones must have an impedance of via Scart 1. It is necessary to you use full between 8 and 32 ohms and have a 3.5 mm Scart cable for this purpose.
  • Page 21 Via aerial socket S-Video Player Make sure the TV and video recorder are If you have an S-Video player you can both switched off. connect it to SCART socket 2 via an adaptor from scart to S-Video/RCA Unplug the aerial lead from the TV and plug audio (not supplied).

  • Page 22: Connecting A Dvd Player

    Via RCA lead (optional) Connecting a DVD Make sure the TV and DVD player are both player switched off. Via SCART Plug one end of the RCA lead into the video Make sure the TV and DVD player are both and audio out sockets on the back of the switched off.

  • Page 23: Connecting A Decoder

    Connecting a decoder Plug one end of the RCA lead into the video and audio out sockets on the back of the Via SCART decoder and plug the other end into the video Make sure the TV and decoder are both and audio in sockets on the TV.

  • Page 24: Connecting Tv With Video And Satellite/Digital Receiver

    Connecting TV with video and satellite/digital receiver Satellite/digital receiver Video Rear of TV Aerial out Aerial out Video Scart socket Scart socket Scart socket Scart 1 Aerial in Aerial in Aerial socket Connecting TV with camcorder AV1/AV2/AV3 (3 scart models only) VIDEO S-Video In S-Video camcorder...

  • Page 25: Help And Service Tips

    Help and service tips The TV does not work No sound • Is the sound muted? Press the Mute Make sure it is plugged into the mains supply button. and switched on. • Is the volume turned down? Poor picture •...

  • Page 26: Technical Specifications Table

    Technical specifications table Picture tube 25” 26” 28” 28” 28” 29” 29” 32” 32” 33” size/type 16:9 PF 16:9 SF 16:9 PF 4:3 SF 4:3 PF 16:9 SF 16:9 PF Screen size 63 cm 68 cm 70 cm 70 cm 70 cm 70 cm 72 cm 82 cm 82 cm 84 cm Visible 59 cm 65 cm...

  • Page 27: Advance Information

    VCT 49xxI ADVANCE INFORMATION Volume 1: General Description General Description 1.1. Features The VCT 49xxI family offers a rich feature set, cover- 1. Introduction ing the whole range of state-of-the-art 50/60-Hz TV applications. The VCT 49xxI is an IC family of high-quality single- –...
  • Page 28 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description 1.2. Chip Architecture IFIN+ Sound Audio Frontend Processor Demodulator Processor IFIN- PROT HOUT HFLB VERT Comb Color CVBS in Display & Filter Decoder YCrCb in Video Panorama Video Deflection Frontend Scaler Backend RGB in Processor Component...
  • Page 29 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description 1.3. System Application 20.25MHz AOUT1 Tuner AIN1 RGB/FB/C1 IFIN+ VOUT1 IFIN- CVBS1/Y1 TAGC 4:3/16:9 CRT AOUT2 H/V/EW AIN2 VOUT2 RGB/SVM VCT 49xxI CVBS2/Y2 SENSE SPEAKER CVBS3/Y3 AIN3 Headphone separate AIN3 only available in QFP package S-Video Video...
  • Page 30 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description 20.25MHz VOUT2 VOUT1 Tuner AOUT1 IFIN+ IFIN- TAGC S-Video Video L - Audio - R YCrCb 4:3/16:9 CRT H/V/EW CVBS1/Y1 AIN1 RGB/SVM VCT 49xxI SENSE S-Video Video L - Audio - R CVBS2/Y2 AIN2 SPEAKER...
  • Page 31 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description 3. Control Interface Table 3–1: I2C Slave Device Addresses Block Device Address Write Read h’8E h’8F h’8C h’8D h’B0 h’B1 h’BC h’BD programmable VCTI 8051 Port I2C M/S Interface int. I2C-Bus Buffer ext.
  • Page 32 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description 4. Specifications 4.1. Outline Dimensions SPGS703000-3(P88)/1E ±0.1 ±0.15 57.7 19.5 ±0.05 0.87 ±0.06 0.28 ±0.15 22.5 ±0.05 1.27 ±0.1 43 x 1.27 = 54.61 ±0.15 22.5 ±0.15 19.5 X 10:1 30 ˚C 1.75 ±0.06 0.48...
  • Page 33 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin Connections and Short Descriptions NC = not connected LV = if not used, leave vacant OBL = obligatory; connect as described in circuit diagram IN = Input Pin OUT = Output Pin SUPPLY = Supply Pin Pin No.
  • Page 34 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin No. Pin Name Type Connection Short Description PSSDIP PMQFP-2 (If not used) 88-pin 144-pin HFLB HOUT Horizontal Flyback Input HOUT Horizontal Drive Output VPROT Vertical Protection Input PWMV PWM Vertical Output DFVBL Dynamic Focus Vertical Blanking Output IN/OUT...
  • Page 35 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin No. Pin Name Type Connection Short Description PSSDIP PMQFP-2 (If not used) 88-pin 144-pin VIN10 Analog Video 10 Input VIN11 Analog Video 11 Input IN/OUT Port 2, Bit 3 Input/Output IN/OUT Port 2, Bit 2 Input/Output XTAL2 Analog Crystal Output...
  • Page 36 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin No. Pin Name Type Connection Short Description PSSDIP PMQFP-2 (If not used) 88-pin 144-pin SPEAKERL Analog Loudspeaker Output, Left VREFAU Reference Voltage, Audio VSUP8.0AU SUPPLY Supply Voltage Analog Audio, 8.0 V SUPPLY Ground Platform P37 /...
  • Page 37 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin No. Pin Name Type Connection Short Description PSSDIP PMQFP-2 (If not used) 88-pin 144-pin ADB10 Address Bus 10 Output ADB9 Address Bus 9 Output ADB8 Address Bus 8 Output ADB7 Address Bus 7 Output ADB6 Address Bus 6 Output ADB5...
  • Page 38 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin Descriptions than one capacitor. By choosing different values, the frequency range of active decoupling can be extended. Supply Pins VSUP1.8DIG − Supply Voltage 1.8 V IF Pins This pin is main and standby supply for the digital core VREFIF −...
  • Page 39 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description XREF − DAC Current Reference (Fig. 4–20) AOUT1 R/L – Audio 1 Outputs (Fig. 4–11) Output of the analog audio 1 signal. Connections to External reference resistor for DAC output currents, these pins are intended to be AC coupled. typical 10 kΩ...
  • Page 40 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description SENSE − Measurement ADC Input (Fig. 4–27) ADB0 − ADB19 − Address Bus Output (Fig. 4–35) This is the input of the analog to digital converter for These 20 lines provide the CPU address bus output to the picture and tube measurement.
  • Page 41 VCT 49xxI ADVANCE INFORMATION Volume 1: General Description Pin Configuration VSUP1.8FE VSUP3.3FE VSUP3.3FE VSUP1.8FE VOUT3 VOUT3 VOUT2 VOUT2 VOUT1 VOUT1 VIN1 VIN1 VIN2 VIN2 VIN3 VIN3 VIN4 VIN4 VIN5 VIN5 VIN6 P20 / DFVBL P20 / DFVBL VIN6 VIN7 P21 / PWMV P21 / PWMV VIN7 VIN8...

  • Page 42: Ordering Information

    MC44608 Few External Components Reliable and Flexible SMPS Controller The MC44608 is a high performance voltage mode controller designed for off−line converters. This high voltage circuit that integrates the start−up current source and the oscillator capacitor, requires few external components while offering a high flexibility and reliability.
  • Page 43 MC44608 Demag UVLO2 Start−up − 50 mV 9 mA Source /20 mV >24 A >120 A Latched off Phase Demag Start−up Phase Logic Management Switching Phase Latched off Output Phase Start−up UVLO1 Start−up Phase UVLO2 Switching Phase 200 A & Phase OUT Disable Buffer...

  • Page 44: Product Standards

    D - 1 approved checked checked prepared PRODUCT STANDARDS Total pages Pages ＡＮ１５５２６Ａ Circuit Function Block Diagram ＴＨＥＲＭＡＬ ＰＲＯＴＥＣＴＩＯＮ ＰＵＭＰ ＡＭＰ  ＵＰ Vref     Pin Descriptions         Pin Name Pin No. １           Inverting Input ２          Power Supply ３         Pump‑up Output ４ ＧＮＤ             ５       Vertical Output ６    Vertical Output Power Supply ７...
  • Page 45 ICs for Audio Common Use AN5277 Dual Channel SEPP Power Amplifier Overview Unit : mm The AN5277 is a monolithic integrated circuit designed 7.7±0.3 for 10.0 W (26 V, 8 Ω)output audio power amplifier. It is a dual channel SEPP IC suitable for stereo operation in TV application.

  • Page 46: Electrical Adjustments

    Connect a digital voltmeter to the cathode of diode D611 at the AV1 mode of the TV and set the screen voltage to the minimum with the screen potentiometer. Adjust the main supply voltage (B+) with P601 potentiometer to the following value (after adjustment, readjust Screen voltage). Size CPT Beko Code CPT Definition Voltage 25"...

  • Page 47: Service Adjustments

    2. SERVICE ADJUSTMENTS To enter “SERVICE MENU” , edit “9301” by remote control while main menu on the secreen.To exit from service menu ,press TV/TXT button. 2.1. AGC Adjustment • Enter service menu • Enter “OPTION” sub menu and set “AGC METHOD” item as a “SYNC+PEAK WHITE” •...
  • Page 48 2.5. Feature Options FEATURE OPTIONS AND SERVICE MENU AVAILABLE : Scart1 component input available , N/A : Scart1 component input not *AV1 YUV available AV2&AV3 AV2&AV3 N/A : Scart2 and AV3 not available AV2 AVAIL.-AV3 N/A : Scart2 yes, AV3 no AV2&AV3 AVAILABLE : Scart2 and AV3 yes NONE : Front AV no CVBS + SVHS : Front AV + S-VHS available...
  • Page 49 1. Values given in Preset Table are typical values and can vary according to the CRT type. 2. Also in the list some changing value are givens acording to CPT type.CPT called in the list as last digits after “-“ of CPT Beko codes.CPT Beko codes are given in Voltage adjustment section.
  • Page 50 VIDEO ADJ. I *R. DRIVE : 356 : 356 : 356 : 356 : 356 : 356 : 356 : 356 : 356 : 356 G. DRIVE : 356 : 356 : 356 : 356 : 356 : 356 : 356 : 356 : 356 : 356...
  • Page 51 VERTICAL EHT 1 :-43 :-80 :-350 :-133 :-60 :-60 :-50 :-120 :-80 :-20 :-180 :-30 :-150 :-90 :-140 :-143 :-155 :-140 :-100 :-60 :-120 :-180 VERTICAL EHT 2 : 0 :-20 :-15 :-13 :-20 :-30 :-45 :-10 :-80 :-40 :-10 :+35 :-60 :-25...
  • Page 52 *UPPER CORNER 1 I :-18 :-20 :-18 :-44 :+40 :-18 :-18 :-10 :-20 :-44 :-44 :+30 :-18 :-14 :+47 *LOWER CORNER 1 I :-3 :+71 :+10 :+16 :+10 :-12 :+90 *UPPER CORNER 2 I :-1 :-10 :+59 :+16 :-10 :-11 :+59 :+42 :+59...
  • Page 53 Part Code Part Definition Notes Position 010712-03 POWER SWITCH S40 4/100A-250V S.BRAC.GDE 29" 010844 TACT SWITCH 2 LEG (MTSB) 28" P(-) 28" P(+) 28" V(-) 28" V(+) 010845 TACT SW WITH GREEN LED 29" 010971 MAIN SWITCH GDE S40 4/100A-250V 28"...
  • Page 54 Part Code Part Definition Notes Position L804 053732 COIL 4.7UH LAL04 52MM L103 L106 053734 COIL 4.7UH LAL03 L405 L603 L803 L805 053739-10 COIL CHOKE 50UH L604 053804 COIL-CHIP 10UH K 0805 L203 L204 L205 L206 L207 L208 053806 COIL-CHIP 8.2UH K /0805 L113 053823 COIL CHOKE 10UH LAN02 280MA/1R...
  • Page 55 Part Code Part Definition Notes Position 101343 CFR 330R J 1/4W /6 26MM R781 R782 101396 CFR 390R J 1/4W /6 26MM R942 R943 101473 CFR 470R K 1/2W /9 52MM R532 101494 CFR 470R J 1/4W /6 26MM R922 R923 102101 CFR 1K J 1/4W /6 52MM...
  • Page 56 Part Code Part Definition Notes Position 141103 CFR 100R J 1/4W /3.2 26MM R710 R712 R714 141182 CFR 180R J 1/4W /3.2 26MM 29" R905 29" R906 29" R907 141222 CFR 220R J 1/4W /3.2 26MM R709 154216 NTC 5.1R M (S234R) R601 154225 PTC 18R/3 PIN BOX TYPE...
  • Page 57 Part Code Part Definition Notes Position R824 171184 RC-CHIP 180R J 1/16W /0603 R430 171224 RC-CHIP 220R J 1/16W/0603 TAPE R120 R121 R832 R840 171227 RC-CHIP 270R J 1/16W/0603 TAPE R225 R226 R229 R230 R231 R232 R427 R428 R429 R476 R702 R703 R704...
  • Page 58 Part Code Part Definition Notes Position R310 172224 RC-CHIP 2.2K J 1/16W/0603 TAPE R130 R131 R252 R253 172276 RC-CHIP 2.7K J 1/16W /0603 R418 R444 R626 R633 172278 RC-CHIP 2.7K %1 1/16W /0603 R623 172336 RC-CHIP 3.3K J 1/16W /0603 R322 R323 R432...
  • Page 59 Part Code Part Definition Notes Position R264 R506 173229 RC-CHIP 22K J 1/16W /0603 R321 29" R335 29" R336 29" R337 R452 R478 R530 173332 RC-CHIP 33K J 1/16W /0603 TAPE R109 R254 R255 R256 R263 173396 RC-CHIP 39K %1 1/16W /0603 TAPE R533 R538 173478...
  • Page 60 Part Code Part Definition Notes Position C237 C238 C247 C248 C253 C254 C430 250475 EC 4.7UF 63V 11*5 R:5 C142 C707 C803 250479 EC 4.7UF 50V 11*5 R:5 C502 251105 EC 10UF 16V 5*3.5 R:5 C901 251107 EC 10UF M 16V 11*5 R:5 C239 C321 C407...
  • Page 61 Part Code Part Definition Notes Position 252150 EC 150UF 400V 40*22 R:10 28" C613 252222 EC 220UF M 400V 40*25 R:10 29" C613 252240 EC 2.2UF 25V 11*5 R:5 29" C304 252476 EC 470UF 25V 11*10 R:5 C508 C509 C526 C527 253101 EC 1000UF 35V 25*13 R:5...
  • Page 62 Part Code Part Definition Notes Position C438 C533 C801 C802 C819 C838 C846 C847 C848 C849 C850 290335 CC-CHIP 33PF J 50V /0603 NPO TAPE C409 290475 CC-CHIP 47PF J 50V /0603 NPO TAPE C132 C135 C136 C137 C138 C148 C149 C150 C151...
  • Page 63 Part Code Part Definition Notes Position C312 C314 C337 C439 C440 C441 C446 C447 C448 C449 C450 C455 C456 C809 292153 CC-CHIP 1.5NF K 50V /0603 X7R TAPE C326 C327 C816 292475 CC-CHIP 4.7NF K 50V /0603 X7R C221 C222 C223 C224 C225...
  • Page 64 Part Code Part Definition Notes Position 293334 CC-CHIP 33NF K 50V /0603 X7R C429 C640 C657 293478 CC-CHIP 47NF K 25V /0603 X7R TAPE C243 C300 C323 C435 C606 C622 C625 C626 C633 C634 C635 C636 C637 C638 C653 293685 CC-CHIP 68NF K 50V /0603 X7R C319 C428...
  • Page 65 Part Code Part Definition Notes Position D631 D801 302299 DIODE 1N4001 29" D301 29" D302 D626 D627 302318 DIODE Z. BZX55C33 52MM ZD502 302786 DIODE Z. MTZJ6.2B 52MM ZD650 302948 DIODE 1N4007 D701 303103 DIODE BY228 D507 303195 DIODE 4148 MELF SOD-80C D202 D403 D404...
  • Page 66 5LZ539-AS CABLE LONG DB.ISO. BROWN 28" CRT-SMPS 5S4516-AS CABLE HARNESS 4+2' LI SAPT L=240+370MM 28" SAPKAB 5ZJ320-01 NAME PLATE BEKO 33P1TL6 D.C. 13*60 28" 5ZZ541-AS CABLE BROWN CRT-CPT GREEN L=500MM 29" CRT-SMPS PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 67 DEGAUSSING COIL ASSY 28" BAND 28" 629169-AS DEGAUSSING COIL ASSY 29" BAND 29" 6PA107-AS SPE.8R 10W(N)/15W(M) 126X57 28" 6X1320-01 NAME PLT SILVER BEKO D.C.60*13*.5 29" 6YS222-10 PLATE FUNCTION GREY HP/AV /SVHS 28" 7KA227-AS SPE.FUN+SUBW. 29T12 29" 7KA283 COVER FUNNEL TOP FU.MAS.21AV1 T04(S.CONT 29"...
  • Page 68 ZX8553-AS CABLE WITH HOLDER 5P L=425 CRT/CHAS 29" X701 ZX8558-AS CABLE WITH HOLDER 5P L=375 CRT/CHAS 28" X701 ZX8800-00A GIFT BOX BEKO/PIL.28C8T39 P/VDNX/2S/SVKL 28" ZX8801 INS.MAN.NO BRAND ENGLISH C8 ZX8820 CIRCUIT DIAGRAM C8 ZX9110 C8 CHASIS-SD SD 29PF P/VDNX/3S/KLK/SVH/A 29"...

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