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Daewoo 14C3 Service Manual - Circuit Block Diagram

Manual is about: CHASSIS : CP-185

Summary of 14C3

  • Page 1

    Service manual color television chassis : cp-185 model : dta-14c4tff dta-20c4tf dta-14v1tf dta-21c6tff http : //svc.Dwe.Co.Kr oct. 2000 daewoo electronics co., ltd. S/m no. : tcp185mef0 specifications 14 v1 21 c6 14/20 c4 sound system version tv standard mono tf tk tu ta pal b/g pal-secam b/g-d/k pa...

  • Page 2: Table of Contents

    1 table of contents safety instruction .................................................................................................................. 2 specifications ............................................................................................................................ 3 1....

  • Page 3: Safety Instruction

    2 safety instruction warning : only competent service personnel may carry out work involving the testing or repair of this equipment 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 v...

  • Page 4: Specifications

    3 pin euro-scart : specifications.

  • Page 5

    4 channel table frequency table cp185 ch europ e ccir france gb(ire- land) east oirt c01 46.25 - 45.75 49.75 c02 48.25 55.75 (l') 53.75 59.25 c03 55.25 60.5 (l') 61.75 77.25 c04 62.25 63.75 (l') 175.25 85.25 c05 175.25 176.00 183.25 93.25 c06 182.25 184.00 191.25 175.25 c07 189.25 192.00 199.25 183....

  • Page 6

    5 ch europ e ccir france gb(ire- land) east oirt s02 112.25 116.75 111.25 112.25 s03 119.25 128.75 119.25 119.25 s04 126.25 140.75 127.25 126.25 s05 133.25 152.75 135.25 133.25 s06 140.25 164.75 143.25 140.25 s07 147.25 176.75 151.25 147.25 s08 154.25 188.75 159.25 154.25 s09 161.25 200.75 167.25 16...

  • Page 7

    6 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 fo...

  • Page 8

    7 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 control...

  • Page 9: Circuit Block Diagram

    8 circuit block diagram.

  • Page 10: Alignment Instructions

    9 alignment instructions microcontroller 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 menu. 3 - quickly press the key sequence : red - green - menu to exit service menu press me...

  • Page 11

    10 3 - focus - adjust the focus volume ( on fbt ) to have the best resolution on screen. 4 - vertical geometry - adjust the vertical amplitude, shift, s-correction and slope to compensate for vertical distortion 5 - horizontal picture centering - adjust h shift to have the picture in the center of t...

  • Page 12

    Audio video.

  • Page 13

    11 mechanical exploded view.

  • Page 14: Printed Circuit Board

    12 printed circuit board.

  • Page 15: Service Parts List

    13 loc. Part code part name part description zz110 ptacpwa21c6f accessory as dta-21c6tff 00100 4850q00910 battery rocket aaa r03/nn 10000 48586a1617a manual all m821 4858213800 bag poly l.D.P.E.T0.5x250x40 milk zz100 48b3740a01 transmitter remocon r-40a01 zz120 ptbcshd616 cover back as dtp-21c6tfp m...

  • Page 16

    14 r920 rf01y109ja r fusible 1w 1 ohm j a curve sct1 4859303530 socket crt pcs629-03c sf1 5pg1984m-- filter saw g1984m sw801 5s40101146 sw power push ss-160-7-b t401 50d10a2--- trans drive td-10a2 t402 50h0000211 fbt 1142.5109 t801 50m3535a1- trans smps "2074,5046 " u100 4859720730 tuner varactor uv...

  • Page 17

    15 c103 cczb1h102k c cera 50v b 1000pf k (axial) c104 cczb1h102k c cera 50v b 1000pf k (axial) c350 cczf1h473z c cera 50v f 0.047mf z axial c351 cczf1h473z c cera 50v f 0.047mf z axial c515 cbzr1c222m c cera y5r 16v 2200pf m axial c516 cbzr1c472m c cera y5r 16v 4700pf m axial c518 cbzf1h104z c cera ...

  • Page 18

    16 j040 85801065gy wire copper awg22 1/0.65 tin coating j041 85801065gy wire copper awg22 1/0.65 tin coating j043 85801065gy wire copper awg22 1/0.65 tin coating j044 85801065gy wire copper awg22 1/0.65 tin coating j050 85801065gy wire copper awg22 1/0.65 tin coating l101 5cpz100k02 coil peaking 10u...

  • Page 19

    17 r810 rd-4z102j- r carbon film 1/4 1k ohm j r811 rc-2z565kp r carbon comp 1/2 5.6m ohm k r817 rd-az473j- r carbon film 1/6 47k ohm j r820 rd-az102j- r carbon film 1/6 1k ohm j r821 rd-4z102j- r carbon film 1/4 1k ohm j r823 rd-4z512j- r carbon film 1/4 5.1k ohm j r829 rd-az223j- r carbon film 1/6 ...

  • Page 20

    18 service paarts list the different parts for system cp-185 oc a e ta t t tu sf01 saw filter g1984m g1984m k2960m j1981m sf02 saw filter l9653m x x x pwc1 power cord as cw4232 cw4232 kkp419c cw3222 z501 cera filter tp5.5mb tp5.5mb tp5.5mb tps6.0mb z502 cera filter tp6.5mb x x x c801 c line across a...

  • Page 21

    19 service parts list th e d if e r e n t p a r ts f o r c r t lo c . "2 1" " ph il ip s" "2 1" " t/ p (d a r k )" "2 1" " t/ p" "2 0" " t/ p" "2 0" " d o sa " "1 4" " ph il ip s" 14 "" c h u n g h w a " "1 4" " d o sa " "1 4" " ek r a n a s" v9 01 a 51 ea l1 55 x0 1 a 51 ef s8 3x 19 1 a 51 ev b 13 ...

  • Page 22

    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 : leesk@web.Dwe.Co.Kr tel : 82-2-360-7802 fax : 82-2-360-7877.

  • Page 23: Functional Description

    1 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...

  • Page 24

    2 functional description 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. The follo...

  • Page 25

    3 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...

  • Page 26

    4 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’ the picture carrier is situated at 33.9 mhz and the am...

  • Page 27

    5 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 1 µ sec ). The fast switching pin 16 of scart is directly connected to the tv processor pin 45 ( fast blanking input ). The display is synchronised with th...

  • Page 28

    6 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 : in fm mode the microcontroller is internally grounded to pin 4. The tda9830 output is muted 6. Sound amplification the device tda7267a is a mon...

  • Page 29

    7 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. 8-2. Power supply primary part operations an oscillator generates pulse signals which turn ...

  • Page 30

    8 8-2-1. Str-f6653 oscillating operation shutdown voltage 11v 16v (ty p.) o.V.P.Volt age 20.5v vin t waveform of vin pin voltage at start- up to pin4 sm ps 2 3 1 5 gnd r804 c850 ocp/fb from pin 6 sm ps (feedback) source r808 drain drive osc rg2 rg1 comp.2 comp.1 c1 r1 str-f6653 1.35ma v th(1) v th(2...

  • Page 31

    9 - when the mosfet is on, the str-f6653 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 v th1 = 0.73v, the str-f6653 ...

  • Page 32

    10 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 oscil...

  • Page 33

    11 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 pr...

  • Page 34

    12 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 be q511 =vcc/2 -vcc = -vcc/2 > -0.6v. So, q511 is in off mode. Then, no voltage reaches i501 p...

  • Page 35

    13 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 c...

  • Page 36

    14 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 sup...

  • Page 37

    15 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. -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 i...

  • Page 38: Ic Description

    16 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 • internal (switchable) time-constant for the if-ag...

  • Page 39

    17 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 40

    18 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/...

  • Page 41

    19 ic description appendix.

  • Page 42

    20 ic marking and version pinning chassis ic marking ( line 3 ) osd languages text cp 185 dw9361/n1/3-de1 ( note : x is the software version ) english, french, german, italian, spanish, dutch, danish, finnish, norwegian, swed- ish, greek, hungarian, english, german, swedish/finnish/hungarian, italia...

  • Page 43

    21 ifin1 23 if input 1 ifin2 24 if input 2 iref 25 reference current input vsc 26 vertical sawtooth capacitor tuneragc 27 tuner agc output audeem 28 audio deemphasis decsdem 29 decoupling sound demodulator gnd2 30 ground 2 for tv processor sndpll 31 narrow band pll filter sndif 32 n.U. Hout 33 horiz...

  • Page 44

    22 appendix ic description.

  • Page 45

    23 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 ic description appendix.

  • Page 46

    24 pinning 3. Tda7267a - 3w mono amplifier • can deliver 3w thd 10% 14.5v/8 Ω • internal fixed gain 32db • no feedback capacitor • no boucherot cell • thermal protection • ac short circuit protection • svr capacitor for better ripple rejection • low turn on/off pop • stand-by mode symbol pin descrip...

  • Page 47

    25 pinning 4. Tda8357j vertical amplifier the tda8357j is a power circuit for use in 90° tv systems for field frequencies of 25 to 200hz and 16/9 picture tubes. The cir- cuit provides a dc driven vertical deflection output circuit, operating as a highly efficient class g system. Due to the full brid...

  • Page 48

    26 pinning pin symbol description 1 vi(pos) input voltage (positive) 2 vi(neg) input voltage (negative) 3 vp supply voltage 4 v ob output voltage b 5 gnd ground 6 vflb flyback supply voltage 7 v oa output voltage a 8 v o(guard) guard output voltage 9 v m input measuring resistor appendix ic descript...

  • Page 49

    27 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 blac...

  • Page 50

    28 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 the memory device is compatible with the i2c memory standard. This is a two wire serial interface t...

  • Page 51

    29 7-3. Block diagram 7-4. Pin description pin name symbol description 1 overcurrent feedback o.C. P/e.B. Input of over current detection signal and feedback signal 2 source s mosfet source 3 drain d mosfet drain 4 supply v in input of power supply for control circuit 5 ground gnd ground ic descript...

  • Page 52

    30 7-5. Control part - electrical characteristics 7-6. Mosfet electrical characteristics description ic pins symbol rating unit number min. Type max operation start voltage 4-5 v in (on) 14.4 16 17.6 v operation stop voltage 4-5 v in (off) 9 10 111 v circuit current in operation 4-5 i in (on) - - 30...