Beko K1 CHASSIS Service Manual

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Service Manual
K1 CHASSIS

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  Summary of Contents for Beko K1 CHASSIS

  • Page 1 Service Manual K1 CHASSIS...
  • Page 2: Table Of Contents

    CONTENTS PAGE o Safety Instructions o Technical Specifications o Remote Control o Preparations o Operating Your TV o Block Diagram o IC Datasheets&Specs o Pin Voltages of IC’s o Oscillosgraphs Of Some IC Pins o Electrical Adjustments o Channel Frequency Tables o Spare Part List...
  • Page 3: Safety Instructions

    SAFETY INSTRUCTIONS GENERAL GUIDELINES exposed metallic part a return path to the 1. It is advised to insert an isolation transformer chassis the reading should be between in the AC supply before servicing a hot 4Mohm and the 20Mohm. When the exposed chassis.
  • Page 4: Technical Specifications

    TECHNICAL SPECIFICATIONS Power source: 220-240V AC, 50-60Hz Power consumption (nom.) : 20”, 21” Standby power consumption : Aerial impedance : 75Ohm, coaxial type Receiving system PAL BG PAL SECAM BG PAL SECAM BG DK PAL I Receiving channels: VHF BAND I CH2-4 VHF BAND III CH5-12...
  • Page 5: Remote Control

    REMOTE CONTROL Special features • Your TV can receive stereo channels directly(NICAM optional). • Scart Socket: Video cassette recorder, satellite receiver, video • Automatic tuning system with country selection. disc player,DVD, TV games or a home computer can be • 100 Programme Memory connected to this AV socket with an appropriate connecting •...
  • Page 6: Preparations

    PREPARATIONS MAIN SUPPLY CONNECTIONS Connect the TV mains plug into your domestic mains socket outlet (230 V 50Hz AC). Press the Program up, Program down button or Numeric Buttons on the remote handset to switch • the TV on. AERIAL CONNECTION Using a 75Ω...
  • Page 7: Operating Your Tv

    OPERATING YOUR TV C. TUNING THE TELEVISION A. SWAP FUNCTION There are two ways of tuning your television: Allows you to swap between the • Manual, where you control the tuning process program you are watching and the or Autoprogram where the television does it all last selected program.
  • Page 8 Please note Tuning with channel numbers If you do not press any buttons for 15 Enter the SETUP menu by pressing seconds the TV will exit the menu the blue button. Press the OK button system. to enter the CHANNEL row. In the Setup menu select PROG NO Use the OK button to select “S”...
  • Page 9 Use the Program down button to select AUTOPROGRAM and the OK Note: TV Guide information may not have for all button. A list of Press countries will programmes. It depends on the broadcasting appear. Select the desired country and determined by broadcasting company. using Program and Volume buttons.
  • Page 10 DISPLAY INFO: If you want to see the TV Guide information automatically while changing the channels, this option should be open. In this case, if you open the provider channel Mini Guide occurs on the screen. 2-) PAT (Picture and Text) (OPTIONAL) In the double window function, you can also display the teletext screen in the second window.
  • Page 11: Block Diagram

    BLOCK DIAGRAM OF E1 CHASSIS...
  • Page 12: Ic Datasheets&Specs

    IC DATASHEETS&SPECS 7.1)VCT 49XYI GENERAL DECRIPTION The VCT 49xyI is an IC family of high-quality singlechip TV processors. Modular design and deep- submicron technology allow the economic integration of features in all classes of single-scan TV sets. The VCT 49xyI family is based on functional blocks contained and approved in existing products like DRX 396xA, MSP 34x5G, VSP 94x7B, DDP 3315C, and SDA 55xx.
  • Page 13 • bass/treble or equalizer • loudness and spatial effect (e.g. pseudo stereo) • Micronas AROUND (virtual Dolby optional) • Micronas BASS • further optional and licence requiring sound enhancements as BBE, SRS Wow and Micronas VOICE – CVBS, S-VHS, YCrCb and RGB inputs –...
  • Page 14: Pin Connections And Short Descriptions

    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 Connection (If not Pin Name Type used)
  • Page 15 Supply Voltage Analog Video Front-end, 1.8 V (main and stand by VSUP1.8FE SUPPLY OBL supply) SUPPLY OBL Ground Platform SUPPLY OBL Ground Platform Supply Voltage Analog Video Front-end, 3.3 V (main and stand by VSUP3.3FE SUPPLY OBL supply) IN/OUT Port 1, Bit 0 Input/Output IN/OUT Port 1, Bit 1 Input/Output IN/OUT...
  • Page 16 7.2)TDA 8357 GENERAL DESCRIPTION The TDA8357J is a power circuit for use in 90° and 110° colour deflection systems for 25 to 200 Hz field frequencies, and for 4 : 3 and 16 : 9 picture tubes. The IC contains a vertical deflection output circuit, operating as a high efficiency class G system.
  • Page 17 • Analog Voltage Range (VDD – VEE) = 3.0 to 18 V Note: VEE must be _ VSS • Linearized Transfer Characteristics • Low–noise – 12 nV//Cycle, f . 1.0 kHz Typical This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
  • Page 18 • Low Power Consumption • Very Low Start-up Current • Soft-Start for noiseless Start-up • Standby Burst Mode with and without Control Signal for lowered Output Voltages • Digital Frequency Reduction in small Steps at Decreasing Load • Over- and Undervoltage Lockout •...
  • Page 19: Pin Voltages Of Ic's

    PIN VOLTAGES OF IC’S IC 101(VCTI) Video-Controller-Text-IFAudio IC Family Pin Name Short Description No Pin Name Short Description Ground Platform Ground Platform Supply Voltage Analog Video Front- VSUP8.0AU Supply Voltage Analog Audio, 8.0 V 8,13 1,35 VSUP3.3FE end, 3.3 V VREFAU Reference Voltage, Audio 3,67...
  • Page 20 IC 301(AN 5277) Dual Channel SEPP Power Amplifier No Pin Name Short Description Pin Name Short Description NOT CONNECTED CH.2 OUT CHANNEL 2 OUTPUT CH.1 IN. CHANNEL 1 INPUT MUTE MUTE 0,37 4,44 RIPPLE FILTER 23,1 0,76 GND(OUTPUT) OUTPUT GROUND GND(INPUT) INPUT GROUND 25,3 8,47 CH.2 IN...
  • Page 21: Oscillosgraphs Of Some Ic Pins

    OSCILLOSGRAPHS OF SOME IC PINS Note : A pattern Generator is connected to the TV (Colour Bar, sound 1 kHZ) VCTI-IC 101 Pin 02, Supply Voltage Analog Audio, 15625 kHz Pin 06, Analog Audio 1 Output, Left, 15625 kHz Pin 08, Analog Audio 3 Input,Left, 15625 kHz Pin 07, Analog Audio Output, Right, 15625 kHz Pin 09, Analog Audio 3 Input,Right, 15625kHz Pin 38, Analog Video 2 Input, 15625kHz...
  • Page 22 Pin 40, Analog Video 1 Output, 15625 kHz Pin 41, Analog Video 2 Output, 15625 kHz Pin 61, Horizontal Fylback Input, 15625 kHz Pin 60, Horizontal Drive Ouput, 15625 kHz Pin 72, Analog Green Ouput 15625 kHz Pin 71, Analog Blue Ouput, 15625 kHz...
  • Page 23 Pin 80, Sense ADC Input, 15625 kHz Pin 73, Analog Red Ouput, 15625 kHz Pin 85, Differential Vert. Sawtooth Out(VERT+), 15625 kHz Pin 84,Differential Vert. Sawtooth Out(VERT-), 15625 kHz TDA 2822-IC 301 Pin 2, Input B, 15625 kHz Pin 1, Input A, 15625 kHz...
  • Page 24 Pin 4, Output B, 15625 kHz Pin 3, Supply Voltage, 15625 kHz Pin 7, Output A, 15625 kHz Pin 6, Flyback Supply Voltage, 15625 kHz Pin 8, Guard Output, 15625 kHz Pin 9, Feedback Input, 15625 kHz...
  • Page 25: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ELECTRICAL ADJUSTMENTS 1.1 Supply Voltage Adjustment Connect a digital voltmeter to the cathode of diode D609 at the AV mode of the TV and set the screen voltage to the minimum with the screen potentiometer. Adjust the main supply voltage (B+) with P602 potentiometer to the following value (after supply adjustment, readjust Screen and focus voltage).
  • Page 26 • There should appear a horizontal line on the center of the set • Adjsut the screen potentiometre to set the line at the first seen point. • Exit from the service menu 2.3 White Balance Adjustment • Apply a white pattern with a pattern generator to the antenna input. •...
  • Page 27 French, German, Turkish, Spanish, Italian, Finnish, Swedish, Norwegian, Danish, Arabic); FARSI(English, French, German, Turkish, Spanish, Italian, Finnish, Swedish, Norwegian, Danish, Persian); HEBREW(English, French, German, Tuskish, Italian, Finnish, Swedish; Norwegian,Danish) : 4:3; 16:9 : AVAILABLE; N/A MAIN TUNER : Philips; Panasonic DB2G3-DA5G3; Temic; Panasonic D44G3; Sharp or Alps PIP TUNER : Philips;...
  • Page 28 2.8 Factory Settings for Service Mode FACTORY SETTINGS FOR SERVICE MODE VIDEO ADJ. I 20" 21"SF (SS8) 21" VC6 50 HZ GEOM. 20" 21"SF (SS8) 21" VC6 R.DRIVE VERTICAL AMPLITUDE -210 G.DRIVE VERTICAL SHIFT B.DRIVE LINEARITY R. CUTOFF S-CORRECTION G. CUTOFF VERTICAL ANGLE B.
  • Page 29 FACTORY SETTINGS FOR SERVICE MODE 21" PF 21"PF 21" PF 21" PF 21"PF 21" PF VIDEO ADJ. I (SS0) (GS9) (VC0) 50 HZ GEOM. (SS0) (GS9) (VC0) R.DRIVE VERTICAL AMPLITUDE -250 -170 -105 G.DRIVE VERTICAL SHIFT B.DRIVE LINEARITY R. CUTOFF S-CORRECTION G.
  • Page 30: Channel Frequency Tables

    CHANNEL FREQUENCY TABLE...
  • Page 32: Spare Part List

    S-VHS AUTO INSER 29" 14.1 7SZ129 HEADPHONE JACK YKB21-5103 031423R CPT SS A48ECR43X51 (HUNGARY) 056320-SS4 DEGAUSSING COIL ASSY 20" BAND 620167-AS K1 CHASSIS 20"P/SX/HP/AV/2SC A-OSD KX2110 KNOB POWER SWITCH SILV.MAS.20K08 J50208F KNOB VOL.20K08 SILVER PAINTED J50262F KNOB PROGRAM VOLUME SILVER 20K08 J50212F...
  • Page 33 InstPoint Object description Component Definitions C611 CC-CHIP 33NF K 50V /0603 X7R 293334R C612-C621 CC-CHIP 47NF K 25V /0603 X7R TAPE 293478R C622 EC 1500UF 35V 20*13 R:5 253155R C623 CC-CHIP 100NF K 50V /0603 X7R 294122R C624 C-PEM 100NF J 250V R:10 274105R C625 C-PPM 330NF K 275V-AC R:22.5 CLASS-B...
  • Page 34 InstPoint Object description Component Definitions L203-L208 COIL-CHIP 10UH K 0805 053804R L301 COIL 10UH K (TAIYO) LAL03 053711R L401-L403 COIL CHOKE 10UH LAN02 280MA/1R 053823R L404 COIL 10UH K (TAIYO) LAL03 053711R L405 COIL CHOKE 10UH LAN02 280MA/1R 053823R L406 COIL 4.7UH LAL03 053734R L502...
  • Page 35 InstPoint Object description Component Definitions R515 CFR 2.7K J 1/4W /6 52MM 102273R R516-R517 RM 3.9R J 1/2W /9 52MM 111396R R521 RW 4.7R J 7W R:5 129487R R522 RMF 0.22R J 1W 119224 See the "CPT Difference List", too R523 CFR 330R J 1/4W /6 52MM 101331R...
  • Page 36 InstPoint Object description Component Definitions X501 CONN.HOUSING 2'LI GREY 31850 X502 CON.HOUSING LOCKED 5/4 31777 X503 CABLE WITH HOLDER 3+1P L=430 CRT/SASI K1 KX1553R See the "CPT Difference List", too X601 CON.HOUSING 2P MALE 31675 X602 CON.HOUSING 2P MALE TPK75(POW)12.6 RED 31797 X703 CRT SOCKET NARROW INCHANG...
  • Page 37 K1-K5 CTV CHASSIS SK201 SCART 1 L207 R235 C229 1OuH R229 100R 270R 47u/16V Audio_PIP C218 C235 L208 SK202 L203 1OuH 1OuH R225 R230 R233 C242 R236 C230 100R 270R 47uF/16V C215 C233 R259 270R 100R C219 C251 47u/16V STATUS_1 R219 10n/50V L204...

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Color television