Daewoo 14A5 Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. TV
  5. Super Vision 14A5
  6. Service manual
Daewoo 14A5 Service Manual

Daewoo 14A5 Service Manual

37/51/55 cm mono color television
Hide thumbs Also See for 14A5:
Table of Contents

Advertisement

Quick Links

See also: Instruction Manual

Advertisement

Table of Contents
loading

Related Manuals for Daewoo 14A5

Summary of Contents for Daewoo 14A5

  • Page 2: Specifications

    Specifications A34JLL90X01,A34EAC01X06,A34EFU13X01 (OEC) (PHILIPS) (POLKOLOR) System C14M7E : PAL-B/G for West Europe (Non-TXT) C14M7F : PAL-B/G, SECAM-L for France (Non-TXT) C14T7B : PAL- I for U.K (TXT) C14M7B : PAL- I for U.K (Non-TXT) C14T7L : PAL - I/I for Ireland (TXT) C14M7L : PAL - I/I for Ireland (Non-TXT) Main Voltage 230V AC, 50Hz...

  • Page 3: 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 RADIATION protection,the replacement tube...

  • Page 4: Circuit Block Diagram

    Circuit block Diagram...

  • Page 5: Alignment Instructions

    Alignment Instructions Remark: A service remocon(R-30SVC) is needed to align the set. 1. AFT 1.1 Standard B/G,D/K,I and L 1) Set a Signal Generator with - RF FREQUENCY = 38.9 MHz, - RF OUTPUT LEVEL = 80 5 dBuV - System = PAL / SECAM - B/G, 2) Connect the Signal Generator RF Output to P101 (Tuner IF Output).

  • Page 6: White Balance

    4. WHITE BALANCE 1) Set the TV to NOR I mode. 2) Set the R,G,B LEVEL to CENTER with R,G,B UP/DOWN KEY . 3) Adjust the R,G,B UP/DOWN KEY of the other color which did not appear on the screen to obtain WHITE. 5.
  • Page 7 If EEPROM (I703) has been changed ; - Option data has to be changed and - all alignment function has to be readjusted . Option Initial state C14M7F C14T7B C14M7E C14M7B C14T7L C14M7L (Blank EEPROM) (FRANCE) ( U.K ) (OTHERS) BAND 3 BAND 3 BAND...
  • Page 8 IC Description DW5255M*(Micro-controller & West/East Teletext Decoder) DW5255RM*(Micro-controller & Cyrillic Teletext Decoder) =SDA5255-A*** (SIEMENS Type No.) (1) General Description The TDA5255 contains a slicer for VPS and TTX, an accelerating acquisition hardware module, a display generator for “LEVEL 1” TTX data and a 8 bit u-controller running at 333 nsec cycle time. The controller with dedicated hardware guarantees flexibility, does most of the internal processing of TTX acquisition , transfers data to/from the external memory interface and receives/transmits data via I2C and UART user interfaces.
  • Page 9 • Controller: - 8 bit configuration - 18 MHz internal clock - 0.33 us instruction cycle - eight 16-bit data pointer registers (DPTR) - two 16-bit timers - watchdog timer - serial interface (UART) - 256 bytes on-chip RAM - 1 Kbyte on-chip extended RAM (access via MOVX) - 8 Kbyte on-chip ACQ-buffer-RAM (access via MOVX) - 6 channel 8-bit pulse width modulation unit - 2 channel 14-bit pulse width modulation unit...
  • Page 10 DW370M* (Micro-controller for Non-Teletext Model) =TMS370C08A05 ( TI Type No.) =TMS370P08A05 (OTP device) (1) General Description The TMS370C08A05 devices are members of the cMCU370 family single-chip microcontrollers. The cMCU370 family provides cost effective real-time system control through use of the PRISM methodology. The PRISM methodology modular fabrication process integrates analog, digital, linear and power technologies on a single chip, thereby maximizing the total integration strategy.
  • Page 11 - 2 S/W Programmable Interrupt Levels - 2 External Interrupt (1 Non-Maskable) - Programmable Rising or Falling Edge Detect • 09 CMOS Compatible I/O Pins - All Peripheral Function Pins Software Configurable for Digital I/O - 6 Bidirectionals, 3 Input Pins •...
  • Page 12 (4) Pin Description * A : DW5255M*/DW5255RM*, B : DW370M* Name Symbol Description P3.1 T1IC1/CR SECAM-L’ OUT for switching SAW filter L9461 - 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...
  • Page 13 Name Symbol Description FIL2 FIL2 PLL Loop Filter I/O for TTX Slicing FIL1 FIL1 PLL Loop Filter I/O for VPS Slicing VCCA VCCA Analog Supply for Slicer IREF IREF Reference Current for Slicer PLLs CVBS CVBS CVBS IN P2.3/8 bit ADC Not Used P2.2/8 bit ADC B0/AN0/ADC...
  • Page 14 CAT24C08P (E PROM) (1) Typical Features • IC Bus compatible • Low power CMOS Technology • 16 Byte page write Buffer • Self-Timed Write cycle with Auto-Clear • 100,000 program/Erase cycles • 100 Year Data Retention • Optional High Endurance Device Available (2) Description The CAT24C08P is a 8K bit serial CMOS E PROM internally organized as 1024x8bits.
  • Page 15 TDA8374A (Single chip TV Processor for Negative modulation IF ) TDA8374 (Single chip TV Processor for Negative & positive modulation IF) (1) General Description The TDA8374(A) is I2C-bus controlled single chip TV processors which are intended to be applied in PAL/NTSC television receiver.
  • Page 16 (3) Block Diagram...

  • Page 17: Cvbs Input

    (4) Pin Description Name Description SOUND IF INPUT The sound equivalent input impedance is 8k5 ohm // 5pF which has to be taken into account for proper termination of the ceramic filters. The DC impedance is very high. The minimum input signal for catching is l mV rms. EXT AUDIO INPUT An external sound signal (500mVrms) for example from SCART can be applied to this pin via a coupling capacitor.
  • Page 18 Name Description A voltage detection circuit is connected to both pins. - pin12 if V12 <6.8V than a power on reset, POR, is generated. The Hout output is disabled immediate. - pin37 if V37 <5.8V than the horizontal output is disabled immediate. INT CVBS INPUT It is recommended that the CVBS1 int and CVBS2 ext input amplitudes are EXT CVBS INPUT...
  • Page 19 Name Description to the luminance input pin 27. The pin is internally AC coupled to the luminance clamp via a capacitor of 50pF; clamping action occurs during burstkey period. LUMINANCE The luminance output signal is approximately l V black-white with typical OUTPUT output impedance of 25O ohm.
  • Page 20 Name Description A flash protection becomes active when this pin is forced >6V. The horizontal drive is switched-off immediately. Once the voltage is <6V the horizontal drive is switched-on again via the slow start procedure. PHI-1 FILTER The loopfilter connected to pin 43 is suitable for various signal conditions as strong/weak and VCR signal.
  • Page 21 TDA4665(Base Band Delay Line) (1) Features • Two comb filters, using the switched-capacitor technique,for one line delay time (64µs) • Adjustment free application • No crosstalk between SECAM colour carriers • Handles negative or positive colour-difference input signals • Clamping of AC-coupled input signals(±(R-Y)and±(B-Y)) •...
  • Page 22 TDA8395 (Secam Decoder) (1) Features Fully integrated filters Alignment free For use with baseband delay (2) Description The TDA8395 is a self-calibrating,fully integrated SECAM decoder. The IC should preferably be used in conjunction with the PAL/NTSC decoder TDA8362 and with the switch capacitor baseband delay circuit TDA4665.
  • Page 23 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 24 STV8225 ( AM SIF Circuit ) (1) General Description The STV8225 is intended for the demodulation of the AM sound of the L standard. (2) Feature • sound AM synchronous demodulator • AM/FM audio switch and AV/TV audio switch (3) Block Diagram (4) Pin Description SYMBOL DESCRIPTION...
  • Page 25 TDA8356 (DC-coupled vertical deflection circuit) (1) General Description The TDA8356 is power circuit for use in 90 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 26 TDA7056 (BTL AUDIO OUTPUT AMPLIFIER) (1) Features • No external components • No switch-on/off clicks • Good overall stability • Low power consumption • Short circuit proof • ESD protected on all pins (2) General Description The TDA7056 is a mono output amplifier contained in a 9 pin medium power package. The device is designed for batteryfed portable mono recorders, radios and television.
  • Page 27 STR-S5707 (Hybrid IC for a Switching Regulator) (1) General Description The STR-S5707 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 28 Electrical Characteristics of Control Part (Ta=25 ) Description Terminal Symbol Rating Unit On-state Voltage IN(ON) Off-state Voltage IN(OFF) Operating Circuit Current IN(ON) Stand-by Circuit Current IN(OFF) On Time Off Time OCP terminal Threshold Voltage -1.12 -0.88 INH terminal Threshold Voltage 1 0.65 0.75 0.85 INH-1...
  • Page 29 TDA8138 (5.1V+12V regulator with Disable and Reset) (1) General Description The TDA8138 is a monolithic dual positive voltage regulator designed to provide fixed precision output voltages of 5.1V and 12V at currents up to 1A. A 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 30 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 31 (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...

  • Page 32: Circuit Description

    Circuit Description Vision IF amplifier, AFC, video demodulator The IF signal from the tuner is fed through a SAW filter to the differential IF input (pin 48 and 49). The first IF stage consists of 3 AC-coupled amplifiers with a total gain control range of over 66 dB. The reference carrier for the video demodulator is obtained by a PLL carrier regenerator (eliminating notch filter compromises, as in reference tuned circuits for passive carrier regeneration).

  • Page 33: Colour Decoder

    This compensates for the storage time of the horizontal deflection transistor. - 2 loop filter (C) is externally connected to pin 42. The horizontal phase can be given a static off set via I2C-but (HSH “horizontal shift”) A dynamic correction is possible by current feedback into the - 2 loop filter capacitor.
  • Page 34 Integrated video filters The TDA8374 has alignment-free internal luminance delay, chroma bandpass and chroma trap. They are implemented as gyrator circuits tuned by tracking to the frequency of the chroma Xtal oscillator. The chroma trap in the Y signal path is by-passed when Y/C input is selected (S-VHS ). For SECAM an extra luminance delay is build-in, for correct delay of the luminance signal.
  • Page 35 TDA8395 SECAM decoder The TDA8395 is an alignment-free SECAM colour decoder, including a Cloche filter, demodulator and line identification circuit. The Cloche filter is a gyrator-capacitor type. Its frequency is calibrated in the vertical retrace period. The calibration reference( pin 1 ) is obtained from the TDA8374 color X-tal oscillator (pin 33). Pin 7 is a decoupling for the Cloche reference.

  • Page 36: Horizontal Deflection

    The R-Y and B-Y colour difference signals (from TDA8374 pins 30 and 29) are AC-coupled and clamped by the input stages at pins 16 and 14. An internal 6 MHz Current controlled oscillator is line locked via a PLL to the sandcastle pulse at pin 5. This clock drives the delay lines to obtain the required 64 sec.
  • Page 37 This is connected via resistor to +8V. As the beam current increase, the voltage on line BeamCurr decreases. BeamCurr is damped by a integration filter before it is fed back to TDA8374 pin 22. The TDA8374 will decrease the contrast (and eventually the brightness) to limit the average beam current. Video amplifiers Three TDA6106Q integrated video amplifiers drive cathode of the picture tube directly.
  • Page 38 When the power transistor turns off and a voltage higher than VTH2 is applied to the INH terminal, C3 immediately discharges and then starts charging again. Even after the discharge of energy of a secondary winding is completed, VINH does not immediately increases. When it gets lower than VTH1, the transistor turns on.
  • Page 39 Although it basically functions as protection of VIN terminal against over-voltage, since VIN terminal is usually supplied from the drive winding of the transformer and the voltage is proportional to the output voltage, it also functions against the over-voltage of secondary output which causes when the control circuit opens or in some other events.

  • Page 40: Electrical Parts List

    Electrical Parts List Components marked with this symbol must only be replaced by a component having identical physical characteristics. MODEL : C14M7E LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK ZZ100 48BRM01A01 TRANSMITTER REMOCON RM-01A01 00030 47P7500001 BATTERY AAM 1.5V ZZ131 58G0000084 COIL DEGAUSSING DC-1450 ZZ132 48519A4610...

  • Page 41: Part Description

    LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK C412 CEXF2C339V C ELECTRO 160V RSS 3.3MF (8X16) TP C414 CCXB2H471K C CERA 500V B 470PF K (TAPPING) C415 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C416 CCXB2H471K C CERA 500V B 470PF K (TAPPING) C417 CEXF2E330V C ELECTRO...
  • Page 42 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK C533 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C604 CCZB1H221K C CERA 50V B 220PF K (AXIAL) C605 CZSL1H560J C CERA 50V SL 56PF J (AXIAL) C606 CZSL1H680J C CERA 50V SL 68PF J (AXIAL) C607 CEXD1H100F C ELECTRO...
  • Page 43 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK C712 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP C713 CCXF1H103Z C CERA 50V F 0.01MF Z (TAPPING) C714 CMXB1H333J C MYLAR 50V EU 0.033MF J (TP) C715 CMXB1H224J C MYLAR 50V EU 0.22MF J (TP) C716 CMXB1H333J C MYLAR...
  • Page 44 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK C908 CCXB1H561K C CERA 50V B 560PF K (TAPPING) C909 CCXB1H561K C CERA 50V B 560PF K (TAPPING) C911 CCYB3D472K C CERA 2KV B 4700PF K D101 D1N4148—- DIODE 1N4148 (TAPPING) D401 DBYV95C—- DIODE BYV95C (TAPPING) D402 DBYV95C—- DIODE...
  • Page 45 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK D802 D1S1888—- DIODE 1S1888 (TAPPING) D803 D1S1888—- DIODE 1S1888 (TAPPING) D804 D1S1888—- DIODE 1S1888 (TAPPING) D805 DBYV95C—- DIODE BYV95C (TAPPING) D806 DBYV95C—- DIODE BYV95C (TAPPING) D807 DBYV95C—- DIODE BYV95C (TAPPING) D808 DBYV95C—- DIODE BYV95C (TAPPING) D811 DBYV95C—- DIODE...
  • Page 46 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK J022 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J023 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J024 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J025 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J027 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J028 85801065GY...
  • Page 47 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK J074 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J075 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J076 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J077 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J080 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J081 85801065GY...
  • Page 48 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK J131 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JH01 4859102130 JACK EARPHONE YSC-1537 JP06 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP08 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP09 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JS01 4859200401 SOCKET RGB...
  • Page 49 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK P904 4859262120 CONN WAFER YFW800-01 P906 4859275220 CONN WAFER YF254-05R (ANGLE) PA601 4850703S03 CONN AS YH025-03+YST025+ULW=200 PWC1 4859903110 CORD POWER AS CW4232+BL102NG+TUBE=2500 Q301 TKTC3198Y- KTC3198Y Q401 T2SD2499— 2SD2499 Q402 T2SD1207T- 2SD1207-T (TAPPING) Q403 TKTA1266Y- KTA1266Y (TP) Q501 TKTC3198Y- KTC3198Y...
  • Page 50 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R309 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R310 RD-4Z473J- R CARBON FILM 1/4 47K OHM J R311 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R312 RD-AZ479J- R CARBON FILM 1/6 4.7 OHM J R401 RD-AZ102J- R CARBON FILM...
  • Page 51 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R521 RD-AZ513J- R CARBON FILM 1/6 51K OHM J R524 RD-AZ303J- R CARBON FILM 1/6 30K OHM J R525 RD-AZ121J- R CARBON FILM 1/6 120 OHM J R526 RD-4Z100J- R CARBON FILM 1/4 10 OHM J R527 RD-AZ750J- R CARBON FILM...
  • Page 52 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R623 RD-4Z221J- R CARBON FILM 1/4 220 OHM J R624 RD-AZ303J- R CARBON FILM 1/6 30K OHM J R639 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R701 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R702 RD-AZ332J- R CARBON FILM...
  • Page 53 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R745 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R746 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R748 RD-AZ622J- R CARBON FILM 1/6 6.2K OHM J R749 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R750 RD-AZ101J- R CARBON FILM...
  • Page 54 LOC. PART-CODE PART-NAME PART-DESCRIPTION REMARK R909 RD-4Z104J- R CARBON FILM 1/4 100K OHM J R911 RC-2Z152J- R CARBON COMP 1/2 1.5K OHM J R912 RC-2Z152J- R CARBON COMP 1/2 1.5K OHM J R913 RC-2Z152J- R CARBON COMP 1/2 1.5K OHM J R920 85801065GY WIRE COPPER...

  • Page 55: Difference Of Parts For Crt

    Difference of Parts for CRT NAME 14” OEC 14” Polkolor 14” PHILPS V901 CRT BARE A34JLL90X A34EFU13X01 A34EAC01X 48A96414P1 4859606640 4859606240 SCT1 SOCKET CRT ISMM03S — ISMM03S 4859303030 4859303030 SCT2 SOCKET CRT — ISHS09S — 4859302930 LP03 COIL BEAD MD-5 —...

  • Page 56: Difference Of Parts For System

    Difference of Parts for System NAME C14M7E C14T7L, C14M7L C14T7B, C14M7B C14M7F PWC1 POWER CORD AS CW4232 CW3222 CW3222 CW4232 4859903110 4859905110 4859905110 4859903110 SF101 SAW FILTER G1966M J1952M J1952M G1966M 5PG1966M— 5PJ1952M— 5PJ1952M— 5PG1966M— Z501 CERA. FILTER TPS5.5MB-TF21 TPS6.0MB TPS6.0MB TPS5.5MB-TF21 5PXPS5R5MB...
  • Page 57 NAME C14M7E C14T7L, C14M7L C14T7B, C14M7B C14M7F RL03 R C-FILM 1/6W 2.2K RD-AZ222J- RL04 R C-FILM 1/6W 10K RD-AZ103J- RL05 R C-FILM 1/6W 10K RL06 R C-FILM 1/6W 68K RD-AZ683J- RL07 R C-FILM 1/4W 120 RD-4Z121J- RL08 R C-FILM 1/6W 15K RD-AZ153J- RL09 R C-FILM...

  • Page 58: Difference Of Parts For Option

    Difference of parts for Option -Teletext option Option I701 X701 C719 TTX - West Europe DW5255M* 18MHz 50V EU 0.33uF Non - TTX DW370M* 20MHz -Antenna option Antenna Type No. Name PH-RM-003 Rod Antenna PH-RM-006 Loop Antenna...

This manual is also suitable for:

14a5t21a5t20a514q114q1t20q1 ... Show all

Table of Contents