Service manual color television 66cm wide stereo chassis : wp-795 model : dwp-28w2zzf dwp-28w2zlf dec. 2000 daewoo electronics co., ltd http : //svc.Dwe.Co.Kr s/m no. : twp795mef0 specification model items dwp-28w2zzf/dwp-28w2zlf tv standard power consumption pal-secam b/g d/k,pal i/i,secam l/l spea...
1 table of contents appendix (appendix is provide only by internet [http://svc.Dwe.Co.Kr]) main features................................................................................................................................ 2 specifications .....................................................
Service manual wp-795 - 2 - 1 - main features 1-1 specifications tv standard pal - secam b/g d/k, pal i/i, secam l/l’ sound system nicam b/g, i, d/k, l, fm 2carrier b/g, d/k power consumption 70 w approx. Sound output power 6wx 2 (at 60% mod, 10%thd) speaker 12w 8 ohm x2 teletext system 10 pages mem...
Service manual wp-795 - 3 - 20 video input 1 vpp ± 3db, impedance 75 Ω 21 common earth 21 pin euro-scart 2 : pin signal description matching value 1 audio output right 0.5 vrms, impedance Ω , ( rf 54% mod ) 2 audio input right 0.5 vrms, impedance > 10 k Ω 3 audio output left 0.5 vrms, impedance Ω , ...
Service manual wp-795 - 4 - 1-2 channel table frequency table ch europe ccir france gb(ireland) 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....
Service manual wp-795 - 5 - c46 671.25 671.25 671.25 671.25 c47 679.25 679.25 679.25 679.25 c48 687.25 687.25 687.25 687.25 c49 695.25 695.25 695.25 695.25 c50 703.25 703.25 703.25 703.25 c51 711.25 711.25 711.25 711.25 c52 719.25 719.25 719.25 719.25 c53 727.25 727.25 727.25 727.25 c54 735.25 735.2...
Service manual wp-795 - 6 - s18 280.25 136.00 295.25 280.25 s19 287.25 160.00 303.25 287.25 s20 294.25 - - 294.25 s21 303.25 303.25 - 303.25 s22 311.25 311.25 311.25 311.25 s23 319.25 319.25 319.25 319.25 s24 327.25 327.25 327.25 327.25 s25 335.25 335.25 335.25 335.25 s26 343.25 343.25 343.25 343.25...
Service manual wp-795 - 7 - 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. If no vps cni code is found, the system check if a cni code is transmitted in the teletext...
Service manual wp-795 - 8 - special case : france if france is selected the tv controlling software sweeps the whole tv bands firstly with france system selected ( positive video modulation) and secondly with europe system selected ( negative video modulation). Special case : switzerland if switzerl...
Service manual wp-795 - 9 - 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 v...
Service manual wp-795 - 10 - 3 - circuit block diagram.
Service manual wp-795 - 11 - 4 - alignment instructions 4-1 microcontroller configuration : service mode to switch the tv set into service mode please sees instruction below. 1 - select pr. Number 91 2 - adjust sharpness to minimum and exit all menu. 3 - quickly press the key sequence : red - green ...
Service manual wp-795 - 12 - 4-3-4 - vertical geometry - adjust the vertical amplitude, shift, s- correction and slope to compensate for vertical distortion. 4-3-5 - horizontal picture centering - adjust h shift to have the picture in the center of the screen. 4-3-6 - east / west correction - adjust...
Service manual wp-795 - 13 - ew trapez 4-3-7 - agc - adjust the antenna signal level at 68 db µ v ± 2 - set rf agc to 0. - increase rf agc level and stop when the level on pin 6 of tda936x goes below 2.5 vdc.
- 14 - schematic diagram.
- 15 - exploded view 1. Dwp-28w2zzf/28w2zlf.
- 16 - printed circuit board pcb main.
- 17 - electrical parts list loc part code part name part description remark zz100 48b3740a13 transmitter remocon r-40a13 (aaa) 2 zz110 ptacpwd395 accessory as dwp-28w2zzf 10 4850q00910 battery r03/nn m821 4858213800 bag instruction l.D.P.E t0.05x250x400 zz120 ptbcshd395 cover back as dwp-28w2zzf m2...
- 18 - c801 cl1jb3474k c line across ac250v 0.47mf u/c/sndf/sv i c805 ceyn2g181p c electro 400v lhs 180mf (25x35) c812 ch1afe472m c cera ac 4kv 4700pf m kx de1610 i c813 cexf2e101v c electro 250v rss 100mf 18x35.5 d403 ddg3------ diode dg3 d404 drgp30j--- diode rgp30j d820 drgp30j--- diode rgp30j d8...
- 19 - c662 cmxm2a224j c mylar 100v 0.22mf j c668 cmxm2a224j c mylar 100v 0.22mf j c669 cmxm2a224j c mylar 100v 0.22mf j c810 cbxb3d102k c cera semi 2kv bl(n) 1000pf k (t) c814 cexf2e470v c electro 250v rss 47mf (16x25) tp c823 cexf1e102v c electro 25v rss 1000mf (13x20) tp c832 cexf1e102v c electro...
- 20 - c412 cexf2c339v c electro 160v rss 3.3mf (8x16) tp c414 cmxm2a104j c mylar 100v 0.1mf j (tp) c418 ccxb1h102k c cera 50v b 1000pf k (tapping) c420 ccxb2h222k c cera 500v b 2200pf k (tapping) c500 cexf1h478v c electro 50v rss 0.47mf (5x11) tp c501 cexf1h100v c electro 50v rss 10mf (5x11) tp c50...
- 21 - q505 tktc3198y- tr ktc3198y q508 tktc3198y- tr ktc3198y q510 tkta1266y- tr kta1266y (tp) q511 tkta1266y- tr kta1266y (tp) q512 tktc3198y- tr ktc3198y q602 tkta1266y- tr kta1266y (tp) q701 tkta1266y- tr kta1266y (tp) q702 tktc3198y- tr ktc3198y q807 tktc3198y- tr ktc3198y q808 tktc3198y- tr kt...
- 22 - d831 d1n4937g-- diode 1n4937g (tapping) d840 d1n4148--- diode 1n4148 (tapping) d841 d1n4148--- diode 1n4148 (tapping) d904 d1n4937g-- diode 1n4937g (tapping) d905 d1n4937g-- diode 1n4937g (tapping) d906 d1n4937g-- diode 1n4937g (tapping) d951 d1n4148--- diode 1n4148 (tapping) d952 d1n4148--- ...
- 23 - j073 85801065gy wire copper awg22 1/0.65 tin coating 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 j078 85801065gy wire copper ...
- 24 - r539 rd-az101j- r carbon film 1/6 100 ohm j r540 rd-az101j- r carbon film 1/6 100 ohm j r541 rd-az101j- r carbon film 1/6 100 ohm j r543 rd-az472j- r carbon film 1/6 4.7k ohm j r545 rd-az682j- r carbon film 1/6 6.8k ohm j r547 rd-az103j- r carbon film 1/6 10k ohm j r548 rd-az472j- r carbon fi...
- 25 - ra40 rd-az102j- r carbon film 1/6 1k ohm j ra41 rd-az102j- r carbon film 1/6 1k ohm j ra44 rd-az682j- r carbon film 1/6 6.8k ohm j ra45 rd-az101j- r carbon film 1/6 100 ohm j ra46 rd-az101j- r carbon film 1/6 100 ohm j ra47 rd-az470j- r carbon film 1/6 47 ohm j ra48 rd-az102j- r carbon film 1...
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 :djkoo@web.Dwe.Co.Kr tel : 82-2-360-7806 fax : 82-2-360-7877.
Appendix service manual wp-795 - 1 - 1 - ic description 1-1 tda936x tv signal processor - teletext decoder with embedded µ -controller. Tv-signal processor z multi-standard vision if circuit with alignment-free pll demodulator z internal (switchable) time-constant for the if-agc circuit z source sel...
Appendix service manual wp-795 - 2 - data capture z text memory 10 pages z inventory of transmitted teletext pages stored in the transmitted page table (tpt) and subtitle page table (spt) z data capture for us closed caption z data capture for 525/625 line wst, vps (pdc system a) and wide screen sig...
Appendix service manual wp-795 - 3 - 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 - au...
Appendix service manual wp-795 - 4 -.
Appendix service manual wp-795 - 5 - tv processor version and µ -controller capacity ic version tda9365 nx / 5 tv range 110° qss sound if amplifier with separated input and agc circuit 9 pal decoder 9 secam decoder 9 ntsc decoder 9 horizontal geometry (e-w) 9 horizontal and vertical zoom 9 rom size ...
Appendix service manual wp-795 - 6 - rf agc in 6 adc 1 : for factory use only ( high impedance ) key-in 7 adc 2 : local key input ( high impedance ) s/sw 8 adc 3 : scart slow switching input ( see xxx) vssc/p 9 digital ground for µ -controller core and peripheral led 1 10 port 0.5 ( 8ma current sink...
Appendix service manual wp-795 - 7 - b0 53 blue output vdda 54 analog supply of teletext decoder and digital supply of tv- processor (3.3v) vpe 55 otp programming supply vddc 56 digital supply to core (3.3v) oscgnd 57 oscillator ground supply xtalin 58 crystal oscillator input xtalout 59 crystal osc...
Appendix service manual wp-795 - 8 -.
Appendix service manual wp-795 - 9 - 1-2 msp3415d multistandard sound processor the msp 3415d is designed as a single-chip multistandard sound processor for applications in analogue and digital tv sets, video recorders, and pc cards. Msp 3415d features - sound if input - no external filters required...
Appendix service manual wp-795 - 10 - - simple controlling of volume, bass, treble analogue section - two selectable analogue pairs of audio baseband input (= two scart inputs) input level: input impedance: >25 k Ω - one selectable analogue mono input (i.E. Am sound): not used in this chassis - two ...
Appendix service manual wp-795 - 11 - tv standards tv system position of sound carrier (mhz) sound modulation color system country b/g 5.5 / 5.7421875 fm stereo pal germany b/g 5.5 / 5.85 fm-mono / nicam pal scandinavia, spain l 6.5 / 5.85 am - mono / nicam secam-l france i 6.0 / 6.552 fm-mono / nic...
Appendix service manual wp-795 - 12 - 11 tp in / out test pin 12 tp in / out test pin 13 tp out test pin 14 nc not connected 15 tp out test pin 16 tp out test pin 17 tp out test pin 18 dvsup digital power supply +5v 19 dvss digital ground 20 nc not connected 21 nc not connected 22 nc not connected 2...
Appendix service manual wp-795 - 13 - 59 ana_in1- in if common 60 nc not connected 61 testen in test pin 62 xtal_in in crystal oscillator 63 xtal_out out crystal oscillator 64 nc test pin 1-3 tda894xj stereo audio amplifier the tda 8944j ( tda 8946j ) is a dual-channel audio power amplifier with an ...
Appendix service manual wp-795 - 14 - block diagram tda8944j 1-4 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. The circuit provides a dc driven vertical deflection output circu...
Appendix service manual wp-795 - 15 - 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 meas...
Appendix service manual wp-795 - 16 - 1-4-1 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...
Appendix service manual wp-795 - 17 - 1-5 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 performance, the ...
Appendix service manual wp-795 - 18 - block diagram tda6107q 1-6 24c16 16 kbit 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. Name description 1, 2, 3 e0, e...
Appendix service manual wp-795 - 19 - 1-7 str - f6653 1-7-1 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. 1-7-2 features - small sip fully isolated molded 5 pins package - many prote...
Appendix service manual wp-795 - 20 - 1-7 -4 pin description pin name symbol description 1 overcurrently 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 gn...
Appendix service manual wp-795 - 21 - 2 - circuit description 2-1 block diagram.
Appendix service manual wp-795 - 22 - 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 fixe...
Appendix service manual wp-795 - 23 - in the type tda9367, intended for 90° picture tubes the following geometry parameters can be adjusted: • horizontal shift • vertical amplitude • vertical slope • s-correction • vertical shift the types which are intended to be used in combination with 110° pictu...
Appendix service manual wp-795 - 24 - the secam decoder contains an auto-calibrating pll demodulator which has two references, via the divided 12 mhz reference frequency (obtained from the µ -controller) which is used to tune the pll to the desired free-running frequency and the bandgap reference to...
Appendix service manual wp-795 - 25 - 2-2 if the tda936x has an alignment free if pll demodulator. The fully integrated oscillator is automatically calibrated, using the 12 mhz crystal as a frequency reference. The if frequency is simply set in tv- processor by i2c bus. The afc information is availa...
Appendix service manual wp-795 - 26 - chassis block diagram : if.
Appendix service manual wp-795 - 27 - 2-3 source switching the tda936x has only one external video input, the external video switching circuit made with q504, q505, q507, q508 and q509 allows 2 external video signal inputs. The switching command can be either the scart1 slow switching pin 8 or the µ...
Appendix service manual wp-795 - 28 - push-pull the push pull mode can be used for output only. Both sinking and sourcing is active, which leads to sleep slopes. The levels are 0 and vddp, the supply voltage 3.3volts. High impedance this mode can be used for input only operation of the port. Special...
Appendix service manual wp-795 - 29 - phase and am discrimination the filtered sound if signals are demodulated by means of the phase and amplitude discriminator block. On the output, the phase and amplitude is available for further processing. Am signals are derived from the amplitude information, ...
Appendix service manual wp-795 - 30 - sound signal flow diagram.
Appendix service manual wp-795 - 31 - 2-6 sound amplification the tda8944j (tda8946j) is a stereo btl audio amplifier capable of delivering 2 x 7 w (2 x 15 w) output power to an 8 Ω load at thd = 10%, using a 12 v power supply and an external heatsink. The voltage gain is fixed at 32db. With the thr...
Appendix service manual wp-795 - 32 - the guard signal is not used by the tda936x to blank the screen in case of fault condition. Damping resistor for hf loop stability a damping resistor (r305) is connected across the deflection coil. East-west amplifier (tda8358j only) the east-west amplifier is c...
Appendix service manual wp-795 - 33 - 2-8 power supply (str f6653) 2-8 -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. 2-8 -2power supply primary part operations an oscill...
Appendix service manual wp-795 - 34 - when the power switch is pushed on, v in increases slowly. During this time, c806 is charged through r802. As soon as v in reaches 16v, the str-f6653 control circuit starts operating. Then, v in is obtained by smoothing the winding voltage which appears between ...
Appendix service manual wp-795 - 35 - 2-8-2-1 str-f6653 oscillating operation.
Appendix service manual wp-795 - 36 - c 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. D when the pin 1 voltage reaches the threshold v...
Appendix service manual wp-795 - 37 - 2-9 tv start-up, tv normal run and stand-by mode operations 2-9 1 tv start-up operations 2-9-1-1 schematic diagram for start-up operations 2-9-1-2 tv start-up and microcontroller initialization - when sw801 power switch is pushed, main ac voltage is applied to t...
Appendix service manual wp-795 - 38 - . If the tv set was on stand-by mode before switching off, the microcontroller switches tv set to stand-by mode, decreasing power pin voltage (pin 63). This matter will be explained on paragraph 5-9-2-b. 2-9-1-3 reset pulse circuit: 2-9-1-4 reset pulse circuit o...
Appendix service manual wp-795 - 39 - - when the dc supply voltage reaches (2.4v +0.6v ) =3.0v, q510 starts conducting but as the q511 base-emitter voltage is the same as the collector-emitter voltage of the saturated q510, q511 switches off and no voltage reaches i501 pin 60. - if the dc supply vol...
Appendix service manual wp-795 - 40 - on 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 r...
Appendix service manual wp-795 - 41 - 2-9-2-1-3 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 143v supply voltage line)...
Appendix service manual wp-795 - 42 - 2-9-2-2 tv set on stand-by mode 2-9-2-2-1 tv set circuit diagram on stand-by mode.
Appendix service manual wp-795 - 43 - 2-9-2-2-2 tv set stand-by mode operations -on 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 ...
