Related Manuals for Daewoo DTL- 25G6F
Summary of Contents for Daewoo DTL- 25G6F
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Page 1: Service Manual
Service Manual 59 / 66 Cm STEREO Colour Television CHASSIS : CP-776 MODEL : DTL- 25G6F DTL- 25G7F DTL- 28G2F DTL- 28G6F DTL- 28G7F DTL- 28G8F DAEWOO ELECTRONICS CO., LTD. http://svc.dwe.co.kr Sep,1999... -
Page 2: Table Of Contents
CONTENTS 1. Specifications ......1 2. Safety Instruction ..... . . 3 3. -
Page 3: Specifications
Specifications 25” : A59EAK071X11 (PHILIPS) 28” : A66EAK071X11 (PHILIPS) System PAL/SECAM-B/G, D/K, PAL-I, SECAM-L/L’, NTSC-3.58/4.43(Play back) Main Voltage 230V AC, 50Hz Power Consumption Stand-by mode : 2.5 Watts Normal operating mode : 25” = 75 Watts 28” = 75 Watts Sound output 7 + 7 Watts, 10 % THD at RF 60 % mod. - Page 4 21 PIN EURO-SCART Signal Designation Matching Value Audio Out(linked with 3) 0.5Vrms,lmp<1 (RF 60% MOD) Audio In(linked with 6) Audio Out(linked with 1) 0.5Vrms,lmp<1 (RF 60% MOD) Audio Earth Blue Earth Audio in (linked with 2) 0.5Vrms,lmp>10 Blue in 0.7Vpp 3dB ,lmp75 Slow(Function) Switching TV:0-2V,PERI:9.5-12V,lmp>10 Green Earth...
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Page 5: Safety Instruction
• 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 2. The only source of X-RAY Radiation in this TV hazardous X-RAY RADIATION.To avoid such receiver is the picture tube.For continued X-RAY hazards, the high voltage must not exceed the... -
Page 6: Circuit Block Diagram
Circuit Block Diagram... -
Page 7: Alignment Instructions
Alignment Instructions 1. AFT 1.1 Standard B/G,D/K,I and L 1) Set a Signal Generator with - RF FREQUENCY = 38.9 MHz, 5dBuV - System = PAL-B/G 2) Connect the Signal Generator RF Output to TP2 (Tuner IF Output). There must be no signal input to the tuner. 3) Set the L109 to TP1(I603, #22) with DC Voltage to 2.5V 0.3V 2. - Page 8 6.3 VERTICAL SIZE has to be done in advance. 1) Apply a RETMA PATTERN Signal. 2) Set the TV to NORMAL I mode. 3) Adjust the upper part of the picture with the V-SIZE DOWN/UP keys. 6.4 VERTICAL S-CORRECTION 1) Apply a CROSSHATCH PATTERN signal. 2) Adjust the S-COR UP/DOWN KEY to obtain the same distance between horizontal lines.
- Page 9 If EEPROM (I702) has been changed ; - Option data has to be changed and - all alignment function has to be readjusted . Service Remocon ( Part Code : 48B1530SVC ) - If you need this service remocon, then please order to our subsidiaries. PO WE R PO WE R SEARCH...
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Page 10: Ic Description
IC Description DW5457 - AE1 (1) General Description The DW5457-AE1 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 PALplus transmissions(line 23). Furthermore, the device provides an integrated C500 based general-purpose, fully 8051-compatible microcontroller with television specific hardware features. - Page 11 - Box shadowing. - Up to 64 Characters in a display row. - Software selectable pixel frequency(12, 13.7, 16, 19.2 and 24MHz). Synchronization - Display synchronization to Sandcastle Pulse Microcontroller - 8bit C500-CPU(8051 compatible) - 24-MHz internal clock(max.) - 0.25 (min.) instruction cycle. - Non-multiplexed 8-bit data and 16 ...
- Page 12 (4) Pin Description Name Symbol Description P3.1 SECAM-L’ OUT for switching SAW filter K9650-M - SECAM-L’ : H - SECAM- L : L P0.7/Open Drain BUSSTOP I2C BUS STOP IN for Computer controlled alignment in Factory ( Active Low ) P0.6/Open Drain Serial data IN/OUT for I2C P0.5/Open Drain...
- Page 13 Name Symbol Description P2.1/8 bit ADC Local KEY SCAN IN P2.0/8 bit ADC S/SW S/SW IDENT IN for Automatic switching between TV/AV mode - H : AV / RGB mode - L : TV mode VSS VSS-OSD Ground P3.3/INT1 REMOTE IR IN VDD VCC-OSD Power Supply LCIN OSCIN-OSD...
- Page 14 AT24C16-10PC (E PROM) (1) Typical Features • IC Bus compatible • Low power CMOS Technology • Eight-byte page(1k, 2k), 16-byte page(4k, 8k, 16k) write buffer • Self-Timed Write cycle with Auto-Clear • 100,000 program/Erase cycles • 100 Year Data Retention •...
- Page 15 TDA8844N2 (I C-bus controlled PAL/NTSC/SECAM TV Processors) (1) General Description The TDA8844N2 is I2C-bus controlled single chip TV processors which are intended to be applied in PAL/NTSC television receiver. The IC is mounted in a S-DIP 56 envelope. (2) Feature •...
- Page 16 (3) Block Diagram...
- Page 17 (4) PIN Description SYMBOL DESCRIPTION ANDIF Sound IF input AUDIOEXT Extemal audio input not connected not connected PLLLF IF-PLL loop filter IFVO IF video output serial clock input serial data input/output DECBG bandgap decoupling CHROMA chrominance input(S-VHS) CVBS/Y external CVBS/Y input main supply voltage 1 (+8V) CVBSINT extemal CVBS input...
- Page 18 TDA4470-M(Multistandard V ideo-if and Quasi Parallel Sound Processing) (1) Feature • 5V supply voltage; low power consumption • Active carrier generation by FPLL principle (frequency-phase-locked-loop)for true synchronous demodulation. • Very linear video demodulation, good pulse response and excellent intermodulation figures. •...
- Page 19 (3) Block Diagram...
- Page 20 (4) Pin Description Function Symbol SIF 1 input(symmetrical) i, SIF 1 Input selector switch 4, 9, 16 Ground SIF-AGC(time constant) 6, 7 VIF input(symmetrical) i, VIF VIF-AGC(time constant) Take over point, tuner AGC Tuner AGC output current Video output o, vid Standard switch L’switch Black level capacitor...
- Page 21 TDA6106Q ( Video Output Amplifier ) (1) General Description The TDA6106Q is a monolithic video output amplifier (5MHz bandwidth) in a SIL 9 MPpackage, using high-voltage DMOS technology, and is intended to drive the cathode of CRT directly . To obtain maximum performance, the amplifier should be used with black-current control. (2) Feature •...
- Page 22 TDA8351 (DC-coupled vertical deflection circuit) (1) General Description and 110 color deflection systems for field frequencies of 50 to 120 Hz. The circuit provides a DC driven vertical deflection output circuit, operating as a high efficient class G system. (2) Feature •...
- Page 23 STR-F6654 (Hybrid IC for a Switching Regulator) (1) General Description The STR-F6654 is a Hybrid IC with a built in power transistor and a separate excitation control IC, designed for converter type switching mode power supply applications. The IC is capable of quasi-resonant mode and requires small number of external component. (2) Feature •...
- Page 24 Rating Parameter Terminal Symbol Unit Operation start voltage 14.4 17.6 IN(ON) Operation stop voltage IN(OFF) Circuit current in operation IN(ON) Circuit current in non-operation IN(OFF) Maximum OFF time OFF(MAX) Minimum time for input of quasi Tth(2) resonant signals Minimum OFF time OFF(MIN) Vth(1) 0.68...
- Page 25 TDA8133 (5.1V+8V regulator with Disable and Reset) (1) General Description The TDA8133 is a monolithic dual positive voltage regulator designed to provide fixed precision output voltages of 5.1V and 8V at currents up to 0.75A. An internal reset cuicuit generates a reset pulse when the output 1 decrease below the regulated voltage value. Output 2 can be disabled by TTL input.
- Page 26 TDA 7269(10W+10W Stereo Amplifier with Mute & ST-BY) (1) Features 20V. • Split supply • High output power 10+10W @ THD=10%, RL=8 , Vs= 14V • No pop at turn-ON/OFF • Mute(POP FREE) • Stand-by feature(LOWlq) • Thermal overoad protection •...
- Page 27 MSP3415D ( Multistandard Sound processor for NICAM & 2-Carrier ) (1) Features • A single-chip Multistandard Sound Pressor for applications in analog and digital TV sets • TWO selectable analog inputs • Automatic Gain control for analog input • All demoudlation and filtering is performed on chip and is individually programmable •...
- Page 28 (3) Description • Analog Sound IF - Input Section The input pins ANA_IN1+, ANA_IN2+ and ANN_IN-offer the possibility to connect two different sound IF sources to the MSP 3415D. By means of bit [8] of AD_CV either terrestrial or satellite sound IF signals can be selected. The analog-to-digital conversion of the preselected sound IF signal is done by a flash-converter, whose output can be used to con-trol an analog automatic gain circuit (AGC), providing optimum level for a wide range of input levels.
- Page 29 • DQPSK-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, which is available at the N-Bus interface. • NICAM-Decoder Before any NICAM decoding can start, the MSP must lock to the NICAM frame structure by searching and synchronizing to the so-called Frame Alignment Words (FAW).
- Page 30 In case of power-on start or starting from standby, the IC switches automatically to the default configuration, shown in the figure above. This action takes place after the first I C transmission into the DFP part. By transmitting the ACB register first, the default setting mode can be changed. •...
- Page 31 (4) Pin Description PIN NAME DESCRIPTION AUD_CL_OUT Audio clock output CW_CL Pay-TV control clock CW_DA Pay-TV control data D_CTR_OUT1 Digital control output 1 D_CRT_OUT0 Digital control output 0 ADR_SEL Control bus address select STANDBYQ Standby (low-active) D_CTR_IN 0 For future use C_CL C clock C_DA...
- Page 32 PIN NAME DESCRIPTION AHVSS Analog ground AGNDC Analog reference voltage high voltage part PDMC1 Capacitor to BAGNDI PDMC2 Capacitor to BAGNDI BAGNDI Buffered AGNDC SC3_IN_L Scart input3 in, left SC2_IN_R Scart input3 in, right ASG2 Analog Shield Ground2 SC2_IN_L Scart input2 in, left SC2_IN_R Scart input2 in, right ASG1...
- Page 33 GMS30112-R098 (4-bit Single Chip Microcomputer for Remote control) (1) General Description The GMS30112-R098 is 4-bit single chip CMOS microcomputer. (2) Feature • program memory : 1024 bytes • data memory : 32 x 4 bits • 43 types of instruction set •...
- Page 34 (4) Pin Description SYMBOL DESCRIPTION 1,2,3,4 K0,K1,K2,K3 4 bit input port with built in pull up resistor 5,6,7,8,9,10 D0,D1,D2,D3,D4,D5 10 bit output port which can be set or reset pin by pin independently. The output structure is N-channel open drain. REMOUT remote control signal output port which has high current driving capability...
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Page 35: Ic Dc Voltage Charts
IC DC Voltage charts Input signal ..PAL/CH5-Video : 8 step colour bar (87% AM) Audio : 1 KHz sinewave (60% FM) User’s control condition ..Contrast, Brightness, Colour, Volume Controls-max. Line voltage . - Page 36 3. TDA 4470-M(I603) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) 4. TDA 7269 (I605) Pin No. V(DC) -14.0 13.5 5. SDAL 5457 (I701) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No.
- Page 37 6. AT24C16-10PC (I702) Pin No. V(DC) 7. STR-F6654 (I801) Pin No. V(DC) 286.9 17.4 8. TDA 8133 (I801) Pin No. V(DC) 11.2...
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Page 38: Circuit Description
Circuit Description 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). - Page 39 AM Demodulator The alignment-free AM demodulator is realized by a synchronous detector. The modulated SIF signal from the SIF amplifier output is multiplied in phase with the limited SIF signal(AM is removed). The AF signal of the demodulator output is fed to the output amplifier and to the SIF-AGC. For all TV standards with negative video modulation(e.g., B/G standard), the AF output signal (Pin 24) is switched off by the standard switch.
- Page 40 To protect the horizontal deflection transistor, the ho rizontal drive is switched off immediately when a power failure ( “ Power-On Reset “ bit POR ) is detected. The power failure may have corrupted the contents of the internal data registers, so the TDA8844 should be started up again.
- Page 41 RGB output and black current stabilization The colour difference signals (R-Y, B-Y) are matrixed with the luminance signal (Y) to obtain the RGBout output signals (pins 19, 20, 21). In the TDA8844 the matrix type automatically adapts to the decoded standard (NTSC,PAL) . Linear amplifiers are used to interface external RGB in signals (pins 23,24,25) from the SCART connector.
- Page 42 The supply voltage for the TDA8351 is 16V at pin 3. The flyback generator has a separate supply voltage of 45V on pin 6. Horizontal deflection The circuit contains horizontal drive, line output transformer. The horizontal driver pulses from the TDA8844 are amplified in the horizontal drive circuit, to get sufficient base-drive current for the high voltage switching transistor Q401.
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Page 43: Service Parts List/Recommendable Spare Parts List
Service Parts List " " Parts recommended for stock Caution " " Safety critical component, Replace only with genuine Daewoo safety part. PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION C302 CEYD1H689W C ELECTRO 50V RHD 6.8MF (16X35.5) - Page 44 PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION C609 CEXF1E470V C ELECTRO 25V RSS 47MF (5X11) TP C820 CCXB3A471K C CERA 1KV B 470PF K (T) C610 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C821 CCXB2H101K C CERA 500V B 100PF K (TAPPING) C611 CEXF1H339V...
- Page 45 PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION CC524 HCFK224ZCA C CHIP CERA Y5V 50V 0.22MF Z 2012 CC802 HCBK152KCA C CHIP CERA 50V X7R 1500PF K 2012 CC528 HCQK181JCA C CHIP CERA 50V CH 180PF J 2012 CC803 HCFK104ZCA C CHIP CERA 50V Y5V 0.1MF Z 2012...
- Page 46 PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION D808 DRGP15J--- DIODE RGP15J HP01 4859102130 JACK EARPHONE YSC-1537 D809 DRGP15J--- DIODE RGP15J I301 PTA2SW4403 HEAT SINK ASS`Y 1TDA8351-- + 7174301011 D810 D1N4937G-- DIODE 1N4937G I301 1TDA8351-- IC VERTICAL TDA8351 D811 DUZ7R5BM-- DIODE ZENER...
- Page 47 PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION L501 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) Q502 TKTC3198Y- KTC3198Y L601 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) Q601 TKTC3198Y- KTC3198Y L602 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) Q603 TKTC3198Y- KTC3198Y...
- Page 48 PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION R422 RF-2Y169J- R FUSIBLE 1/2 1.6 OHM J R830 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R423 RF-4Y228K- R FUSIBLE 1/4 0.22 OHM K R831 RD-4Z300J- R CARBON FILM 1/4 30 OHM J R501 RD-AZ109J- R CARBON FILM 1/6 1 OHM J...
- Page 49 PART CODE PART NAME DESCRIPTION PART CODE PART NAME DESCRIPTION RC520 HRFT153JCA R CHIP 1/10 15K OHM J 2012 RC713 HRFT102JCA R CHIP 1/10 1K OHM J 2012 RC524 HRFT102JCA R CHIP 1/10 1K OHM J 2012 RC715 HRFT272JCA R CHIP 1/10 2.7K OHM J 2012 RC525 HRFT470JCA R CHIP...
- Page 50 PART CODE PART NAME DESCRIPTION RCA17 HRFT750JCA R CHIP 1/10 75 OHM J 2012 RCA18 HRFT750JCA R CHIP 1/10 75 OHM J 2012 RCA19 HRFT750JCA R CHIP 1/10 75 OHM J 2012 RCA20 HRFT102JCA R CHIP 1/10 1K OHM J 2012 RCA30 HRFT470JCA R CHIP 1/10 47 OHM J 2012...
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Page 51: Mechanical Exploded View
Mechanical Exploded View 25G6F... - Page 52 25G7F...
- Page 53 28G2F...
- Page 54 28G7F...
- Page 55 28G8F...
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Page 56: Printed Circuit Board
Printed Circuit Board Main PCB... -
Page 57: Schematic Diagram
CP-776 Chassis Schematic Diagram POWER SOUND/SIF VIDEO/CVBS VERTICAL HORIZONTAL... - Page 58 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “DAEWOOELEC” E-mail : G7F00E@web.dwe.co.kr FAX : 82-32-510-7624 TEL: 82-32-510-7630 PRINTED DATE : SEP. 1999...