Daewoo DTA-14C4TFF Service Manual
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Daewoo DTA-14C4TFF Service Manual

Chassis: cp-185
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Service Manual
Colour Television
Chassis : CP-185
Model : DTA - 14C4TFF
RTV servis Horvat
Tel:
++385-31-856-637
Tel/fax: ++385-31-856-139
Mob:
098-788-319
www.rtv-horvat-dj.hr
SPECIFICATIONS
Version
TV standard
Sound system
Power consumption
Sound Output Power
Speaker
Teletext system
Aerial input
Channel coverage
Tuning system
Visual screen size
Channel indication
Program Selection
Aux. terminal
Remote Control Unit
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
DTA - 20C4TF
DTA - 14V1TF
DTA - 21C6TFF
TF
TK
PAL B/G
PAL-SECAM B/G – D/K
mono
14 ": 39W;
20
": 42W;
21
2.5W (at 60% mod, 10%THD)
3W 8 ohm
10 pages memory FASTEXT (FLOF or TOP)
– version with teletext only
75 ohm unbalanced
Off-air channels, S-cable channels and hyperband
frequency synthesiser tuning system
14 " : 34 cm
20 " : 48 cm
21 " : 51 cm
On Screen Display
100 programmes
EURO-SCART : Audio / Video In and Out,
R/G/B In, Slow and Fast switching, SVHS In.
Audio-Video Jack on front of cabinet in common
connection with EURO-SCART.
Headphone jack (3.5 mm) on front of cabinet
R-40A01
S/M No. : TCP185MEF0
TU
TA
PAL B/G – SECAM L/L '
PAL I/I
": 45W.
JUN. 2000

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Summary of Contents for Daewoo DTA-14C4TFF

  • Page 1 R/G/B In, Slow and Fast switching, SVHS In. Aux. terminal Audio-Video Jack on front of cabinet in common connection with EURO-SCART. Headphone jack (3.5 mm) on front of cabinet Remote Control Unit R-40A01 DAEWOO ELECTRONICS CO., LTD. JUN. 2000 http : //svc.dwe.co.kr...

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com TABLE OF CONTENTS SAFETY INSTRUCTION ........................2 SPECIFICATIONS ..........................3 1. 21 Pin EURO-SCART ........................3 2. Channel table ..........................4 3. ATTS sorting method ........................6 CIRCUIT BLOCK DIAGRAM ......................8 ALIGNMENT INSTRUCTION ......................9 1.

  • Page 3: Safety Instruction

    All manuals and user guides at all-guides.com 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.

  • Page 4: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS Pin EURO-SCART :...

  • Page 5: Channel Table

    All manuals and user guides at all-guides.com SPECIFICATIONS Channel table FREQUENCY TABLE CP185 EUROP GB(IRE- EAST EUROP GB(IRE- EAST FRANCE FRANCE E CCIR LAND) OIRT E CCIR LAND) OIRT 46.25 45.75 49.75 623.25 623.25 623.25 623.25 48.25 55.75 (L') 53.75 59.25 631.25 631.25...
  • Page 6 All manuals and user guides at all-guides.com SPECIFICATIONS EUROP GB(IRE- EAST EUROP GB(IRE- EAST FRANCE FRANCE E CCIR LAND) OIRT E CCIR LAND) OIRT 311.25 311.25 311.25 311.25 112.25 116.75 111.25 112.25 119.25 128.75 119.25 119.25 319.25 319.25 319.25 319.25 126.25 140.75 127.25...

  • Page 7: Atts Sorting Method

    All manuals and user guides at all-guides.com SPECIFICATIONS ATSS sorting method The TV set sweeps all the TV bands from beginning of VHF to the end of UHF. The TV controlling software for each program checks if a VPS CNI code is transmitted. If no VPS CNI code is found, the system checks if a CNI code is transmitted in the tele- text lines ( Packet 8/30 format 1 ).
  • Page 8 All manuals and user guides at all-guides.com SPECIFICATIONS Special case : France If France is selected the TV controlling software firstly sweeps all the TV bands with France system selected (positive video modulation) and secondly with Europe system selected (negative video modulation). Special case : Switzerland If Switzerland is selected the TV controlling software firstly sweeps all the TV bands with Europe system selected (negative video modulation) and secondly with France system selected (positive video modulation).

  • Page 9: Circuit Block Diagram

    All manuals and user guides at all-guides.com Base bond signal Video in Sound processor I601 SCART 1 Switching #37 #58 SIF (5.5MHz for system B/G) circuit SCART 2 Audio out SCART 1 switch control from #8-I501 and #8 SCART 1 Audio in SCART 1 Trap 5.5MHz...

  • Page 10: Alignment Instruction

    In Service Mode press “ OK” to stop the microcontroller i.e. the I2C bus is free and the set can be controlled by external equipment. Press “ OK” again to allow the microcontroller to control the set again Microcontroller configuration : Tuner Option Option Tuner maker DAEWOO / SAMSUNG PHILIPS ( Video processor AGC ) PHILIPS (tuner internal AGC ) System Option Option System PAL –...
  • Page 11 - Adjust H Shift to have the picture in the center of the screen. 7 - AGC - Adjust the antenna signal level to 70 dBµV± 2 for Daewoo tuner (62 dBµV± 2 for Philips tuner). - Set RF AGC to 0.

  • Page 12: Schematic Diagram

    All manuals and user guides at all-guides.com RTV servis Horvat Tel: ++385-31-856-637 Tel/fax: ++385-31-856-139 Mob: 098-788-319 www.rtv-horvat-dj.hr AUDIO VIDEO...

  • Page 13: Printed Circuit Board

    All manuals and user guides at all-guides.com 14-1 14-2 14-3 16-1 10-1 4858193401 EPS 20D5 10-1 4858211800 BAG PE LDPE T0.03X1300X1000 4858055200 CARTON BOX DW-3 4855415800 SPEC PLATE 150 ART P/E FILM(C/TV) 16-1 7172401412 SCREW TAPPTITE TT2 TRS 4X14 MFZN BK 4852155601 COVER BACK HIPS BK...

  • Page 14: Service Parts List

    PART DESCRIPTION ZZ110 PTACPWA21C6A ACCESSORY AS DTA-21C6TAF C415 CEXF2E100V C ELECTRO 250V RSS 10MF (10X20) TP 00100 4850Q00910P BATTERY DAEWOO AAA C603 CEXF1C471V C ELECTRO 16V RSS 470MF (10X12.5)TP C801 CL1SC3474M C LINE ACROSS 275V 0.47MF M821 4858213800 BAG POLY L.D.P.E.T0.5X250X40 MILK...
  • Page 15 All manuals and user guides at all-guides.com SERVICE PARTS LIST LOC. PART CODE PART NAME PART DESCRIPTION LOC. PART CODE PART NAME PART DESCRIPTION M791 4857913304 RUBBER CUSION FR RUBBER SPONGE C500 CEXF1H478V C ELECTRO 50V RSS 0.47MF (5X11) TP P401 4850705N18 CONN AS...
  • Page 16 All manuals and user guides at all-guides.com SERVICE PARTS LIST LOC. PART CODE PART NAME PART DESCRIPTION LOC. PART CODE PART NAME PART DESCRIPTION C536 CCZF1H223Z C CERA 50V F 0.022MF Z C968 CMXL2E104K C MYLAR 250V 0.1MF K MEU TP C577 CCZB1H561K C CERA...
  • Page 17 All manuals and user guides at all-guides.com SERVICE PARTS LIST LOC. PART CODE PART NAME PART DESCRIPTION LOC. PART CODE PART NAME PART DESCRIPTION R340 RD-4Z473J- R CARBON FILM 1/4 47K OHM J D904 DBAV21---- DIODE BAV21 (TAPPING) R341 RD-2Z332J- R CARBON FILM 1/2 3.3K OHM J D905...
  • Page 18 All manuals and user guides at all-guides.com SERVICE PARTS LIST LOC. PART CODE PART NAME PART DESCRIPTION LOC. PART CODE PART NAME PART DESCRIPTION R573 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R914 RC-2Z102K- R CARBON COMP 1/2 1K OHM K R575 RD-AZ102J- R CARBON FILM...

  • Page 19: The Different Parts List

    All manuals and user guides at all-guides.com THE DIFFERENT PARTS FOR CRT (CP-185) THE DIFFERENT PARTS FOR SYSTEM (CP-185) LOC. NAME LOC. 21" PHILIPS 21" T/P (DARK) 21" T/P 20" T/P SF01 SAW FILTER G1984M G1984M K2960M J1981M A51EAL155X01 A51EFS83X191 A51EVB13X09 A48EAX33X01 V901 SFO2 SAW FILTER L9653M...

  • Page 20: Functional Description

    All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR Vision IF amplifier The vision IF amplifier can demodulate signals with positive and negative modulation. The PLL demodulator is completely alignment-free. The VCO of the PLL circuit is internal and the frequency is fixed to the required value by using the clock frequency of the µ-Controller/Teletext decoder as a reference.
  • Page 21 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS The vertical synchronisation is realised by means of a divider circuit. The vertical ramp generator needs an external resistor and capacitor. For the vertical drive a differential output current is available. The outputs are DC coupled to the vertical output stage.
  • Page 22 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS RGB output circuit and black-current stabilisation In the RGB control circuit the signal is controlled on contrast, brightness and saturation. The ICs have a linear input for external RGB signals. The signals for OSD and text are internally supplied to the control circuit. The output signal has an amplitude of about 2 Volts black-to-white at nominal input signals and nominal settings of the various controls.
  • Page 23 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS For SECAM L and L’ the TDA9361/TDA9381 is switched to positive modulation via I2C bus. SECAM L’ transmission only occur in VHF band I and have their picture and sound carrier interchanged, compared to SECAM L and PAL B/G channels. For SECAM L’...
  • Page 24 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS Fast R, G, B insertion : The external R, G, B insertion needs a fast switching and cannot be controlled by the software ( instruction cycle of 1µ sec ). The fast switching pin 16 of SCART is directly connected to the TV processor pin 45 ( Fast blanking input ).
  • Page 25 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 5. SECAM L/L’ sound switching circuit. The microcontroller pin 4 is a three levels output. The voltage and configuration of this port is described below : Sound mode Port configuration Voltage Push Pull Internally shorted to ground...
  • Page 26 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 8. Power supply (STR F6653) 8-1. STR-F6653 general description The STR-F6653 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications.
  • Page 27 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS O.V.P.volt age 20.5V 16V (TY P.) Shutdown voltage 11V Waveform of Vin pin voltage at start- up 8-2-1. STR-F6653 oscillating operation TO PIN4 SM PS STR-F6653 DRAIN DRIVE Comp.1 V th(1) SOURCE R808 1.35mA...
  • Page 28 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 6.5 V (STR -F6653 internal capacitor) 3.7 V 0.73 V Pin 1 (OCP / FB) (M OSFET drain current) (M OSFET drain - source voltage) M O S F E T switching ON / OFF Waveforms during oscillating operation - When the MOSFET is ON, the STR-F6653 internal capacitor C1 is charged at the constant voltage 6.5V.
  • Page 29 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 8-2-3. STR-F6653 protection circuits overcurrent protection function (OCP) Overcurrent protection is performed pulse by pulse detecting at STR-F6653 pin 1 (OCP) the peak of the MOSFET drain current in every pulse. latch circuit This circuit sustains an output low from the STR-F6653 internal oscillator and stops operation of the power supply when over- voltage protection (OVP) and thermal shutdown (TSD) circuit are in operation...
  • Page 30 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 9-1-2. TV start-up and microcontroller initialisation - When SW801 power switch is pushed, main AC voltage is applied to T801 transformer (after rectification by D801...D804 diodes). Then, T801 SMPS transformer starts operating and supplies DC voltage to I823 (3.3V regulator). - This regulator provides 3.3V DC voltage to I501 microcontroller power supply pins (pins 54, 56, 61) and to the reset pulse cir- cuit which provides reset pulse to I501 microcontroller reset pin (pin 60).
  • Page 31 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 9-1-4. Reset pulse circuit operations description - When DC supply voltage from I823 regulator starts rising (from 0V to 1.2V), no current flows through D591 zener diode. So, Q510 is in off mode. Also V =Vcc/2 -Vcc = -Vcc/2 >...
  • Page 32 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS In normal run mode, I501 microcontroller pin 63 (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 11V DC voltage (from T801 SMPS transformer pin 13) does not flow through Q811 and Q810 transistors but flows through I806 IC error amplifier...
  • Page 33 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS 9-2-1-3. power supply functioning during TV set normal run mode - I801 transmits controlled pulses to T801 which generates DC voltages after rectification by secondary side diodes and electrolytic capacitors (for example by D820 and C813 to give 124V -110V supply voltage line). - 8V, 5V, 3.3V supply voltage lines have stabilised voltages obtained by I822, I820, I823 voltage regulators.
  • Page 34 All manuals and user guides at all-guides.com APPENDIX ALIGNMENT INSTRUCTIONS I810 CONTROLLED RECTIFIER 6V DC HIGH R830 R829 R820 C830 HIGH Q807 Q808 HIGH POWER Q809 I810 controlled rectifier switching circuit 9-2-2-2. TV set stand-by mode operations -In stand-by mode, I501 microcontroller pin 63 (power) is set to low. - So, Q809 collector is set to high.

  • Page 35: Ic Description

    All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 1. TDA9361 : TV signal processor - Teletext decoder with embedded µ-Controller. TDA9381 : TV signal processor - with embedded µ-Controller. TV-signal Processor • Multi-standard vision IF circuit with alignment-free PLL demodulator •...
  • Page 36 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION Data Capture • Text memory 10 pages • Inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page Table (SPT) • Data Capture for 525/625 line WST, VPS (PDC system A) and Wide Screen Signalling (WSS) bit decoding Automatic selection between 525 WST/625 WST •...
  • Page 37 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION Data Capture Features - Video Signal Quality detector - Data Capture for 625 line WST - Data Capture for 525 line WST - Data Capture for US Closed Caption - Data Capture for VPS data (PDC system A) - Data Capture for Wide Screen Signalling (WSS) bit decoding - Automatic selection between 525 WST/625WST - Automatic selection between 625WST/VPS on line 16 of VBI...
  • Page 38 All manuals and user guides at all-guides.com...
  • Page 39 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION IC marking and version IC marking Chassis OSD languages Text ( line 3 ) CP 185 DW9361/N1/3-DE1 English, French, German, Italian, Spanish, English, ( note : x is the software Dutch, Danish, Finnish, Norwegian, Swed- German, version )
  • Page 40 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION IFIN1 IF input 1 IFIN2 IF input 2 IREF Reference current input vertical sawtooth capacitor TUNERAGC tuner AGC output AUDEEM audio deemphasis DECSDEM decoupling sound demodulator GND2 ground 2 for TV processor SNDPLL narrow band PLL filter SNDIF...
  • Page 41 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION...
  • Page 42 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 2. TDA9830 TV sound AM-Demodulator and audio source switch The TDA9830, a monolithic integrated circuit, is designed for AM-sound demodulation used in L and L’ standard. The IC provides an audio source selector and also mute switch. Block Diagram : TDA9830...
  • Page 43 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION Pinning Symbol Description IFIN Sound IF differential input signal n.c. Not connected AGC capacitor REF voltage filtering capacitor n.c. Not connected AMOUT AM demodulator output AMIN Input signal from audio switch AFOUT Output signal from audio switch EXTIN...
  • Page 44 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION Pinning Symbol Description Supply voltage Audio output Supply Voltage Rejection Audio input n.c. Not Connected S-GND Signal ground n.c. Not Connected n.c. Not Connected P-GND P Ground P-GND P Ground P-GND P Ground P-GND...
  • Page 45 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 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 guard output voltage O(guard) input measuring resistor...
  • Page 46 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 5. 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 perfor- mance, the amplifier should be used with black-current control.
  • Page 47 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 6. 24C08 8 Kbit EEPROM features : - 8 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 48 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 7-3. Block diagram 7-4. pin description NAME SYMBOL DESCRIPTION Overcurrent feedback O.C. P/E.B. Input of over current detection signal and feedback signal Source Mosfet source Drain Mosfet drain Supply Input of power supply for control circuit Ground Ground...
  • Page 49 All manuals and user guides at all-guides.com APPENDIX IC DESCRIPTION 7-5. Control part - electrical characteristics IC PINS RATING DESCRIPTION SYMBOL UNIT NUMBER MIN. TYPE (on) Operation start voltage 14.4 17.6 (off) Operation stop voltage (on) Circuit current in operation µA (off) Quiescent current in non-operation...

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