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Daewoo DTH-29U3 Service Manual

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S/M No.TCN830FEF0
CHASSIS : CP-830F
MODEL : DTH-29U3
OTC 2003

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Summary of Contents for Daewoo DTH-29U3

  • Page 1 S/M No.TCN830FEF0 CHASSIS : CP-830F MODEL : DTH-29U3 OTC 2003...

  • Page 2: Table Of Contents

    CP830F Service Manual CONTENTS DOCUMENT HISTORY 1 MAIN FEATURES 1.1 SPECIFICATIONS 1.1.1 GENERAL 1.1.2 EURO-SCART 1 (21 Pin) 1.1.3 EURO-SCART 2 (21 Pin) 1.2 CHANNEL/FREQUENCY TABLE 1.3 ATSS SORTING METHOD 1.3.1 GENERAL CASE 1.3.2 SPECIAL CASE 2 SAFETY INSTRUCTION 3 ALIGNMENT INSTRUCTIONS 3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE 3.2 SERVICE MODE NAVIGATION 3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS...
  • Page 3 CP830F Service Manual 4.4.1.3 Analogue Section 4.4.1.4 NICAM & FM/AM-Mono 4.4.1.5 German 2-Carrier System (DUAL FM System) 4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR 4.5.1 DESCRIPTION 4.5.2 FEATURES 4.5.3 PINNING 4.5.4 BLOCK DIAGRAM 4.6 TDA894XJ STEREO AUDIO AMPLIFIER 4.6.1 FEATURES 4.7 TDA835XJ VERTICAL AMPLIFIER 4.7.1 TDA8357J...
  • Page 4 CP830F Service Manual 5.3.1.8.5 Digital 656 Output 5.3.2 BACK END 5.3.2.1 Digital Input Interface 5.3.2.2 Horizontal Scaler 5.3.2.3 Luma Contrast and Brightness 5.3.2.4 Black Level Expander/Compressor (BLEC) 5.3.2.5 Luma Sharpness Enhancer (LSE) 5.3.2.6 Dynamic Peaking 5.3.2.7 Luma Transient Improvement (LTI) 5.3.2.8 Mixing of Dynamic Peaking and LTI 5.3.2.9 Chroma Transient Improvement 5.3.2.10 Analog Back End...
  • Page 5 CP830F Service Manual 5.9.2 POWER SUPPLY PRIMARY PART OPERATIONS 5.9.2.1 Start -up Circuit: VIN 5.9.2.2 STR-F6654 Oscillating Operation 5.9.2.3 STR-F6654 Protection Circuits 5.10 TV START-UP, TV NORMAL RUN AND STAND BY MODE OPERATIONS 5.10.1 TV START-UP OPERATIONS 5.10.1.1 Schematic Diagram For Start-Up Operations 5.10.1.2 TV Start-Up And Microcontroller Initialisation 5.10.2 TV NORMAL RUN AND STAND-BY MODE OPERATIONS 5.10.2.1 TV On Normal Run Mode...

  • Page 6: Document History

    CP830F Service Manual DOCUMENT HISTORY VERSION DATE COMMENTS V1.00 18/11/02 Creation of document (Author M Hearn) for project CP830 100Hz TV. V1.01 22/11/02 Reformatting of the document, plus insertion of Document History section 1 MAIN FEATURES 1.1 SPECIFICATIONS 1.1.1 GENERAL TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L Colour system...

  • Page 7: Euro-Scart 2 (21 Pin)

    CP830F Service Manual Green Earth N.C. Green Input 0.7 Vpp 0.1V, Impedance 75 N.C. Red Earth Blanking Earth Red Input 0.7 Vpp 0.1V, Impedance 75 Fast Switching 0 to 0.4V : Logic 0 , 1 to 3V : Logic 1 , Impedance 75 Video Out Earth Video In Earth Video Output...

  • Page 8: Channel/Frequency Table

    CP830F Service Manual 1.2 CHANNEL/FREQUENCY TABLE CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT 46.25 45.75 49.75 48.25 55.75 (L ) 53.75 59.25 55.25 60.5 (L ) 61.75 77.25 62.25 63.75 (L ) 175.25 85.25 175.25 176.00 183.25 93.25 182.25 184.00 191.25 175.25 189.25...
  • Page 9 CP830F Service Manual CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT 671.25 671.25 671.25 671.25 679.25 679.25 679.25 679.25 687.25 687.25 687.25 687.25 695.25 695.25 695.25 695.25 703.25 703.25 703.25 703.25 711.25 711.25 711.25 711.25 719.25 719.25 719.25 719.25 727.25 727.25 727.25 727.25 735.25...
  • Page 10 CP830F Service Manual CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT 273.25 296.75 287.25 273.25 280.25 136.00 295.25 280.25 287.25 160.00 303.25 287.25 294.25 294.25 303.25 303.25 303.25 311.25 311.25 311.25 311.25 319.25 319.25 319.25 319.25 327.25 327.25 327.25 327.25 335.25 335.25 335.25 335.25...

  • Page 11: Atss Sorting Method

    CP830F Service Manual 1.3 ATSS SORTING METHOD The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each program checks if a VPS CNI code is transmitted (this system exists for German, Swiss and Austrian transmissions). If no VPS CNI code is found, then the system checks if a CNI code is transmitted as part of the teletext transmission ( Packet 8/30 format 1 and format 2).
  • Page 12 CP830F Service Manual Note : If two programs with the same name but a different code are found these two programs are listed in group I, II or III . The sorting order within group II, III, and IV is based on the channel frequency. The program with the lowest frequency is allocated the first rank in its group, and so forth until the last program of the group which has the highest frequency.

  • Page 13: Safety Instruction

    CP830F Service Manual 2 SAFETY INSTRUCTION WARNING: Only competent service personnel may carry out work involving the testing or repair of this equipment. X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not exceed the specified limit. The nominal value of the high voltage of this receiver is 25-26 KV (20 -21 ) or 26 KV (25 - 28 ) at max beam current.

  • Page 14: Alignment Instructions

    CP830F Service Manual 3 ALIGNMENT INSTRUCTIONS 3.1MICROCONTROLLER CONFIGURATION : SERVICE MODE To switch the TV set into service mode please see instruction below. 1 - Select PR. number 91 2 - Adjust sharpness to minimum and exit all menus. 3 - Within 2 seconds press the key sequence : RED - GREEN - menu The software version is displayed beside the word Service, e.g.

  • Page 15: Tv Set Alignment

    (DW) 3.3.2 OPTION 2 1 Fixed to ‘0’ JVC remote control AVL control OFF PICTURE TILT ON Program list enabled See table below. Daewoo Remote control AVL control ON PICTURE TILT OFF Program list disabled Beam Current Tube (mA) Nominal 0.95...

  • Page 16: White Balance

    CP830F Service Manual 3.4.3 WHITE BALANCE - Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature. - Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature. 3.4.4 FOCUS Adjust the Focus volume ( on FBT ) to have the best resolution on screen.

  • Page 17: Agc

    CP830F Service Manual PARABOLA CORNER B & CORNER T EW TRAPEZ 3.4.8 AGC - Make sure option bits are correct for the tuner fitted on the chassis (See above how to change option bits). - Adjust the antenna signal level at 64 dB V± 2 - Tune a colour bar pattern.

  • Page 18: Ic Description

    CP830F Service Manual 4 IC DESCRIPTION 4.1 TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER TVText Pro is a 8-bit controller based on a enhanced 8051 core with embedded teletext, On screen Display and TV controller functions. 4.1.1 BLOCK DIAGRAM OF THE SDA55XX 4.1.2 DESCRIPTION The SDA 55xx is a single chip teletext decoder for decoding World System Teletext data as well as Video Programming System (VPS), Program Delivery Control (PDC), and Wide Screen Signalling (WSS) data used for PAL...

  • Page 19: Ic Marking And Version

    CP830F Service Manual and evaluation of header control bits) once per field. Additionally, the firmware can provide high-end Teletext-features like Packet-26-handling, FLOF, TOP and list-pages. 4.1.3 IC MARKING AND VERSION Chassis IC marking OSD languages ATSS countries Text CP830 BULGARIAN, Austria, Belgium, CZECH, GERMAN, Switzerland, Czech...

  • Page 20: Vsp9412A - Scan Rate Converter Including Multistandard Colour Decoder

    CP830F Service Manual PSDIP 52-pin Pin Name Type Short Description n.c. n.c. n.c. n.c. Ground (0V) VDD3.3 Input/Output 3.3V n.c. n.c. RESET A low level on this pin resets the device. XTAL2 Output of the inverting oscillator amplifier XTAL1 Input of the inverting oscillator amplifier VSSA Ground for analog components VDDA2.5...

  • Page 21: Block Diagram Of The Vsp9412A

    CP830F Service Manual 4.2.1 BLOCK DIAGRAM OF THE VSP9412A Data Input Memory Display Output Acquisition Processing Processing Processing HOUT CVBS (Y/C) Hor. Scaling VOUT Noise Mem. Controller Panorama Reduction Field Memory Display Sync CVBS CLK27 (OUT) Peaking, CTI Source Select A/D Conversion R/Cr 4:2:2 Format...
  • Page 22 CP830F Service Manual Multi-standard colour decoder - PAL/NTSC/SECAM including all substandards - Automatic recognition of chroma standard - Only one crystal necessary for all standards RGB-FBL or YUV-H-V input - 8 bit amplitude resolution for RGB or YUV - 8 bit amplitude resolution for FBL or H ITU656 support - ITU656 output - DS656 output (double-scan 656like output)

  • Page 23: Pinning

    CP830F Service Manual 4.2.3 PINNING Name Description Remarks cvbs1 CVBS input cvbs2 CVBS input cvbs3 CVBS input cvbs4 CVBS input or Y1 cvbs5 CVBS input or C1 cvbs6 CVBS input or Y2 cvbs7 CVBS input or C2 Cvbso1 CVBS output 1 Cvbso2 CVBS output 2 Cvbso3...

  • Page 24: Ddp 3315C - Display And Deflection Processor

    CP830F Service Manual Name Description Remarks Vss33rgb Supply voltage RGB Vddargb Supply voltage for RGB 1.8V Vssargb Supply voltage for RGB Vddafbl Supply voltage for FBL 1.8V Vssafbl Supply voltage for FBL Vddapll Supply voltage for PLL 1.8V Vddd1 Supply voltage for digital 1.8V digital Vssdl Supply voltage for digital...

  • Page 25: Block Diagram Of The Ddp 3315C

    CP830F Service Manual 4.3.1 BLOCK DIAGRAM OF THE DDP 3315C Clock analog 27/32/ Input Generator RGB- 54 MHz Matrix Upcon- Picture Matrix / Analog Input Video Tube 656 YCrCb Version/ Improve- PFG / Output Interface Control CrCb Scaling ment Switch 4:2:2 / Sense 4:1:1...
  • Page 26 CP830F Service Manual - horizontal frequency for VGA/SVGA/1080I - black switch off procedure - supports horizontal and vertical dynamic focus Miscellaneous - selectable ITU-R 601 4:1:1 / 4:2:2 YC r C b input at 27/32 MHz or double scan ITU-R 656 input at 54 MHz line-locked clock - crystal oscillator for horizontal safety - picture frame generator...

  • Page 27: Pinning

    CP830F Service Manual 4.3.3 PINNING Pin No. Pin Name Description Remarks Picture bus Luma Picture bus Luma (MSB) 656EN Enable 656 input mode LLC2 System clock input Horizontal Sync Input Vertical Sync Input FREQSEL Selection of H-Drive Frequency Range Clock select 1 Clock select 0 Additionnal VSYNC input XTAL2...
  • Page 28 CP830F Service Manual Pin No. Pin Name Description Remarks Scan Velocity Modulator ROUT Analog Output Red GOUT Analog Output Green Analog Output Blue GNDO Ground, analog Back End XREF Reference Input for RGB DAC s VSUPO Supply voltage, Analog Back End VRD/BCS DAC Reference, Beam current safety AGND...

  • Page 29: Msp341X Multistandard Sound Processor

    CP830F Service Manual 4.4 MSP341X MULTISTANDARD SOUND PROCESSOR The MSP 341x is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards. The MSP3411 has all functions of MSP3410 with the addition of a virtual surround sound features. Surround sound can be reproduced to a certain extent with two loudspeakers.

  • Page 30: Dsp-Section (Audio Baseband Processing)

    CP830F Service Manual 4.4.1.2 DSP-Section (Audio Baseband Processing) flexible selection of audio sources to be processed performance of terrestrial de-emphasise systems (FM, NICAM) digitally performed FM-identification decoding and de-matrixing digital baseband processing: volume, bass, treble simple controlling of volume, bass, treble 4.4.1.3 Analogue Section two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25...
  • Page 31 CP830F Service Manual Loud- Sound IF 1 Loudspeaker Pre- speaker Sound processing modulator Sound IF 2 Processing Subwoofer Headphone Sound Headphone Prescale Processing SCART 1 SCART 2 SCART1 SCART SCART 3 Prescale SCART Input Output Select SCART 4 Select MONO SCART2 Architecture of MSP341x Pin connections and short description...
  • Page 32 CP830F Service Manual Pin No. Pin Name Type Short description Not Connected Not Connected RESETQ Power-On-reset DACA_R Headphone out right DACA_L Headphone out left VREF2 Reference ground 2 high voltage part DACM_R Loudspeaker out Right DACM_L Loudspeaker out Left Not Connected Not Connected Not Connected SC2_OUT_R...

  • Page 33: Tda4470 - Multistandard Video-If And Quasi Parallel Sound Processor

    CP830F Service Manual 4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR 4.5.1 DESCRIPTION The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF (VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.

  • Page 34: Block Diagram

    CP830F Service Manual 4.5.4 BLOCK DIAGRAM l' switch Loop Offset comp. filter (optional) Control FPLL phase shift switch VIF amp Video Video det. C AGC Standard switch Standard (VIF) C BL Tuner Tuner Supply C ref Take over FM det. point SIF 2 Intercarrier...

  • Page 35: Tda894Xj Stereo Audio Amplifier

    CP830F Service Manual 4.6 TDA894XJ STEREO AUDIO AMPLIFIER The TDA 8944J ( TDA 8946J ) is a dual-channel audio power amplifier with an output power of 2 x 7 W ( 2 x 15 W ) at an 8 ? load and a 12 V supply. The circuit contains two Bridges Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic.

  • Page 36: Tda835Xj Vertical Amplifier

    CP830F Service Manual V CC1 V CC2 OUT1- IN1- IN1+ OUT1+ TDA8944J OUT2- IN2- IN2+ OUT2+ V CC STANDBY/ MODE MUTE LOGIC SHORT CIRCUIT TEMPERATURE PROTECTION MBK933 GND1 GND2 Block Diagram TDA8944J 4.7 TDA835XJ VERTICAL AMPLIFIER The TDA835xJ are power circuit for use in 90 and 110 colour deflection systems for field frequencies of 25 to 200Hz and 16/9 picture tubes.
  • Page 37 CP830F Service Manual Vi(pos) Vi(neg) TDA8357J Vflb Vo(guard) Pinning Symbol Description Vi(pos) input voltage (positive) Vi(neg) input voltage (negative) supply voltage output voltage B ground Vflb flyback supply voltage output voltage A VO(guard) guard output voltage input measuring resistor -36-...

  • Page 38: Tda8358J

    CP830F Service Manual 0(guard) guard i(pos) i(diff) i(sb) i(diff) input/ feedback i(neg) i(neg) i(diff) i(sb) i(diff) 4.7.2 TDA8358J An East-West output stage is provided that is able to sink current from the diode modulator circuit. Features : Few external components Highly efficient fully DC-coupled vertical output bridge circuit Short rise and fall time of the vertical flyback switch Guard circuit...
  • Page 39 CP830F Service Manual Vi(pos) Vi(neg) TDA8357J Vflb Vo(guard) comp 0(guard) comp comp guard i(pos) i(diff) input/ i(sb) feedback i(diff) i(neg) i(neg) i(diff) i(sb) i(diff) iEW(top) iEW(bot) -38-...

  • Page 40: Tda6107Q

    CP830F Service Manual 4.8 TDA6107Q The TDA6107Q includes three video output amplifiers in one plastic DIL-Bent-SIL 9-pin medium power package, using high voltage DMOS technology, and is intended to drive the three cathodes of a colour CRT directly. To obtain maximum performance, the amplifier should be used with black-current control.

  • Page 41: 24C16 - 16 Kb Eeprom

    CP830F Service Manual Block diagram TDA6107Q 4.9 24C16 - 16 KB EEPROM Features : 16 Kbit serial I2C bus EEPROM Single supply voltage : 4.5 V to 5.5 V 1 Million Erase/Write cycles (minimum) 40 year data retention (minimum) Pin description Pin No.

  • Page 42: Str - F6654

    CP830F Service Manual 4.10 STR - F6654 4.10.1 GENERAL DESCRIPTION The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications. 4.10.2 FEATURES Small SIP fully isolated moulded 5 pins package Many protection functions : Pulse-by-pulse overcurrent protection (OCP) Overvoltage protection with latch mode (OVP)

  • Page 43: Pin Description

    CP830F Service Manual 4.10.4 PIN DESCRIPTION NAME SYMBOL DESCRIPTION Overcurrent feedback O.C. Input of over current detection signal and feedback signal P/E.B. Source Mosfet source Drain Mosfet drain Supply Input of power supply for control circuit Ground Ground 4.10.5 CONTROL PART - ELECTRICAL CHARACTERISTICS IC PIN RATING DESCRIPTION...

  • Page 44: Mosfet Electrical Characteristics

    CP830F Service Manual 4.10.6 MOSFET ELECTRICAL CHARACTERISTICS IC PIN RATING DESCRIPTION SYMBOL UNIT NUMBER MIN. TYPE Drain-to-source break down voltage VDSS Drain leakage current IDSS On-resistance RDS (on) 1.95 Switching time noec Thermal resistance OCH - F 0.95 0C/W -43-...

  • Page 45: Cp830 Chassis Description

    CP830F Service Manual 5 CP830 CHASSIS DESCRIPTION 5.1 BLOCK DIAGRAM -44-...

  • Page 46: If Section

    CP830F Service Manual 5.2 IF SECTION 5.2.1 BLOCK DIAGRAM -45-...

  • Page 47: Vision If Amplifier

    CP830F Service Manual 5.2.2 VISION IF AMPLIFIER The video IF signal (VIF) is fed through a SAW filter to the differential input (Pin 6-7) of the VIF amplifier. This amplifier consists of three AC-coupled amplifier stages. Each differential amplifier is gain controlled by the automatic gain control (VIF-AGC). The output signal of the VIF amplifier is applied to the FPLL carrier generation and the video demodulator.

  • Page 48: Video Demodulation And Amplifier

    CP830F Service Manual 5.2.5 VIDEO DEMODULATION AND AMPLIFIER The video IF signal, which is applied from the gain controlled IF amplifier, is multiplied with the inphase component of the VCO signal. The video demodulator is designed for low distortion and large bandwidth. The demodulator output signal passes an integrated low pass filter for attenuation of the residual vision carrier and is fed to the video amplifier.

  • Page 49: Input Selector

    CP830F Service Manual as an overlay for the CVBS channel (RGB+FBL). This block contains a matrix (for RGB signals). 5.3.1.2 Input Selector The analog CVBS or SVHS luma signal are fed to the inputs CVBS1...7 of VSP94x2A (amplitude 0.5...1.5 V pp ). One signal is selected and fed to the first ADC.

  • Page 50: Noise Reduction

    CP830F Service Manual 5.3.1.8.2 Noise Reduction The structure of the temporal motion adaptive noise reduction is the same for luminance as for chrominance signal. The output of the motion detector is weighted. The look-up table input value range is separated into 8 segments. It is possible to freely program different behaviour of the noise reduction by using predefined curve characteristic for each segment.

  • Page 51: Luma Sharpness Enhancer (Lse)

    CP830F Service Manual 5.3.2.5 Luma Sharpness Enhancer (LSE) Sharpness is one of the most critical features for optimum picture quality. This important processing is performed in the LSE circuitry of DDP 3315C. It consists of the dynamic peaking, the luma transient improvement (LTI) and an adaptive mixer.

  • Page 52: Analog Back End

    CP830F Service Manual a) Cr Cb input of CTI b) Cr Cb input + correction signal c) sharpened and limited Cr Cb 5.3.2.10 Analog Back End The digital RGB signals are converted to analogue RGB by three 10-bit digital to analogue converters (DAC). Each RGB signal has two additional DACs with 9-bit resolution to adjust analogue brightness (40% of the full RGB range) and cutoff / black level (60% of the full RGB range).

  • Page 53: Synchronization And Deflection

    CP830F Service Manual The picture tube measurement returns results on every field for: - cutoff R - cutoff G - cutoff B - white drive R or G or B (sequentially) The average beam current limiter (BCL) works on both the digital YC r C b input from VSP and the inserted analog RGB signals (OSD and Teletext) by using the sense input for the beam current measurement.

  • Page 54: Acquisition Features

    CP830F Service Manual 5.4.2 ACQUISITION FEATURES Multistandard Digital Data Slicer Parallel Multi-norm Slicing (TTX, VPS, WSS) Four Different Framing Codes Available Data Caption only Limited by available Memory Programmable VBI-buffer Full Channel Data Slicing Supported Fully Digital Signal Processing Noise Measurement and Controlled Noise Compensation Attenuation Measurement and Compensation Group Delay Measurement and Compensation Exact Decoding of Echo Disturbed Signals...

  • Page 55: Tuning

    CP830F Service Manual 5.4.5 TUNING The AFC information is supplied by the demodulator IC, and becomes available on SDA55xx pin 15 for controlling software. The controlling software uses this information for tuner frequency tracking ( automatic following ). The AFC windows is typically between 50 KHz and 100 KHz.

  • Page 56: Scart Pin 8 Data (Slow Switching)

    CP830F Service Manual There are the following output possibilities; 14:9 16:9 ZOOM 14:9 ZOOM 16:9 FULL SCREEN (for either 4:3 or 16:9 tubes) DEFAULT refers to a signal for which there is no implementation, so is treated as if there is no signal data available. 5.4.6.2 SCART Pin 8 Data (Slow Switching) When there is a signal from SCART 1 pin 8 or SCART 2 pin 8 (named the Slow Switching SSW signal) the TV will enter AV mode, unless the user forces another source (which is possible even though slow switching is present).

  • Page 57: 4:3 Crt

    CP830F Service Manual Zoom factor-16:9 CRT Format Name Description Application Vertical Horizontal 100% Picture is centred with right hand side Standard 4/3 picture. of the display. with 576 active lines 14:9 114% Picture is centred with black bars at 14:9 picture-letter box the left and right hand side of the display.

  • Page 58: External Source Control Logic

    CP830F Service Manual Zoom factor-4:3 CRT Format Name Description Application Vertical Horizontal 14:9 100% Picture is centred with 14:9 picture-letter black bars at the top and box format with 576 bottom of the display, active lines realised by compressing the vertical size 16:9 100% Picture is centred with...

  • Page 59: Over Current Protection

    CP830F Service Manual The terms used in the schematic are described below; 1. AUTO represents a situation where the television has self-selected its picture source. This could be when the SCART SLOW SWITCHING pin has gone to a high state, and the AV 1 input is selected without the intervention of the user.

  • Page 60: Sound Processing

    CP830F Service Manual or Swedish OSD languages are selected, the teletext will be correctly displayed. However, if Polish, Hungarian, Czech, Slovakian, Rumanian or Russian OSD are selected, the consequence will be incorrect teletext display for the national option characters. Romanian national font options will be selected. PRIMARY OSD Language C12 C13 C14...

  • Page 61: Nicam Decoder

    CP830F Service Manual AM signals are derived from the amplitude information, whereas the phase information serves for FM and NICAM demodulation. 5.6.4 NICAM DECODER In case of NICAM - mode, the phase samples are decoded according the DQPSK - coding scheme. The output of this block contains the original NICAM bitstream.

  • Page 62: Vertical Deflection

    CP830F Service Manual Mute : In this mode the amplifier is DC biased but not operational (no audio output). This allows the input coupling capacitors to be charged to avoid pop-noise. The devices is in mute mode when 2.5 V < VMODE < (Vcc-1.5 V). Operating : In this mode the amplifier is operating normally.

  • Page 63: Start -Up Circuit: Vin

    CP830F Service Manual 5.9.2.1 Start -up Circuit: VIN The start-up circuit is used to start and stop the operation of the control IC, by detecting a voltage appearing at VIN pin (pin 4). When the power switch is pushed on, VIN increases slowly. During this time, C806 is charged through R802. As soon as VIN reaches 16V, the STR-F6654 control circuit starts operating.

  • Page 64: Str-F6654 Oscillating Operation

    CP830F Service Manual 5.9.2.2 STR-F6654 Oscillating Operation -63-...

  • Page 65: Str-F6654 Protection Circuits

    CP830F Service Manual When the MOSFET is ON, the STR-F6654 internal capacitor C1 is charged at the constant voltage 6.5V. At the same time, the voltage at pin 1 (OCP / FB) increases with the same waveform as the MOSFET drain current. When the pin 1 voltage reaches the threshold voltage VTH1 = 0.73V, the STR-F6654 internal comparator 1 starts operating.

  • Page 66: Tv Start-Up, Tv Normal Run And Stand By Mode Operations

    CP830F Service Manual thermal shutdown circuit (TSD) This circuit triggers the latch circuit when the frame temperature of STR-F6654 IC exceeds 140 C overvoltage protection circuit (OVP) This circuit triggers the latch circuit when the Vin voltage exceeds 22V (typ.) 5.10 TV START-UP, TV NORMAL RUN AND STAND BY MODE OPERATIONS 5.10.1 TV START-UP OPERATIONS...
  • Page 67 CP830F Service Manual - Then, the microcontroller consults I702 EEPROM via I2C bus to know the last TV set mode (normal run mode or stand-by mode ) before switching off. - If the TV set was on normal run mode before switching off, the microcontroller delivers horizontal drive voltage at pin 23 on the I502 and picture appears on screen.

  • Page 68: Tv Normal Run And Stand-By Mode Operations

    CP830F Service Manual 5.10.2 TV NORMAL RUN AND STAND-BY MODE OPERATIONS Depending on remote control commands, I701 microcontroller part pin 52 (power) is set to: - high for normal run mode - low for stand-by mode 5.10.2.1 TV On Normal Run Mode 5-10-2-1-1 I701 microcontroller part pin 52 (power) effect I701 microcontroller part pin 52 (power) is connected to the following circuit: -67-...
  • Page 69 CP830F Service Manual On normal run mode, I701 microcontroller pin 52 (power) is set to high So, I810 controlled rectifier is not conducting - Q809 is conducting. So, Q808 is not conducting and Q807 is conducting - So, Q807 collector is connected to the ground and I810 controlled rectifier gate pin is set to low (no conducting) So, current from 10V DC voltage (from T801 SMPS transformer pin 13) does not flow through Q811 and Q810 transistors but flows through I806 IC error amplifier - Q809 is conducting.
  • Page 70 CP830F Service Manual 5-10-2-1-3 power supply functioning during TV set normal run mode - I801 transmits controlled pulses to T801 which generates DC voltages after rectifications by secondary part diodes and electro capacitors (by example by D820 and C813 on 130V supply voltage line). - 8V, 5V, 3.3V, 1.8V supply voltage lines have stabilized voltages obtained by I822, I820, I824, I821 voltage regulators.

  • Page 71: Tv Set On Stand-By Mode

    CP830F Service Manual 5.10.2.2 TV Set On Stand-By Mode 5-10-2-2-1 TV set circuit diagram on stand-by mode I826 I701 2.5V 2.5V MICOM 3.3V R817 -70-...
  • Page 72 CP830F Service Manual 5-10-2-2-2 TV set stand-by mode operations ∑ On stand-by mode, I701 microcontroller pin 52 (power) is set to low. So, Q809 collector is set to high. Then, I810 controlled rectifier gate pin is set to high and I810 is conducting. So, current flows from pin 16 SMPS transformer to the ground via I804 optocoupler and Q810 and Q811 transistors (which are conducting).

  • Page 73: Service Parts List

    M491A 7178301011 SCREW TAPPING TT2 WAS 3X10 MFZN C866 CCYR3A471K C CERA 1KV 470PF K 125C M561 48556174SD01 MARK BRAND “DAEWOO 28”” BLACK “ C871 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP M681 4856812001 TIE CABLE NYLON66 DA100 D404 DFMP3FU—-...
  • Page 74 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK PF01B 4850702N08 CONN AS YPH500-02+YLT500+USW=300 4856310300 EYE LET BSR T0.2 (R1.6) PF02 4859238620 CONN WAFER YPW500-02 4856310300 EYE LET BSR T0.2 (R1.6) Q401 TST2310DH1 ST2310DHI 4856310300 EYE LET BSR T0.2 (R1.6)
  • Page 75 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK CC523 HCBK104KCA C CHIP CERA 50V X7R 0.1MF K 2012 RC530 HRFT103JCA R CHIP 1/10 10K OHM J 2012 CC524 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 RC532 HRFT223JCA R CHIP...
  • Page 76 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK C370 CCXF1H473Z C CERA 50V F 0.047MF Z (TAPPING) C863 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C401 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) TP C870 CCXB3A471K C CERA...
  • Page 77 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK C537 CCZB1H103K C CERA 50V B 0.01MF K (AXIAL) J136 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING C538 CCZB1H103K C CERA 50V B 0.01MF K (AXIAL) J142 85801065GY WIRE COPPER...
  • Page 78 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK J362 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING L506 5CPZ479K04 COIL PEAKING 4.7UH 10.5MM K (LAL04TB) J363 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING L507 5CPZ100K02 COIL PEAKING 10UH 3.5MM K (LAL02TB)
  • Page 79 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK R515 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R788 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R518 RD-AZ750J- R CARBON FILM 1/6 75 OHM J R789 RD-AZ103J- R CARBON FILM...
  • Page 80 CP830F Service Manual PART CODE PART NAME DESCRIPTION REMARK R996 RD-2Z105J- R CARBON FILM 1/2 1M OHM J R997 RD-2Z102J- R CARBON FILM 1/2 1K OHM J ZZ140 PTPKCPH29U7FLS PACKING AS DTH-29U7FLF-S M681 2TP06575CL TAPE OPP T0.065XW75X500M CLEAR M801 GPBBW6U7022 DTF-29U7 M811 4858101500UP...

  • Page 81: Exploded View

    CP830F Service Manual 7. EXPLODED VIEW 7.1 DTH-29U7...

  • Page 82: Schematic Diagram

    CP830F Service Manual 9. SCHEMATIC DIAGRAM...

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