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Daewoo DV-K11WY-PB Service Manual - 2. Electrical Adjustment

Summary of DV-K11WY-PB

  • Page 1

    Service manual model : dv-k11wz-pb/a dv-k11wy-pb dv-k11wz-qb/a daewoo electronics co., ltd overseas service dept..

  • Page 2

    General power requirement ac90~260v, 50/60hz power consumption typical 13w temperature 5 ¡£ c~35 ¡£ c (operating) -20 c~60 c (storage temperature) operating position horizontal only dimensions (wxhxd) 360x90x312 (mm) weight approx 5.4kg format vhs standard tape widch 12.65mm tape speed (sp): 23.39mm...

  • Page 3

    S afety c h e c k after s ervicing examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance wit...

  • Page 4: Video Cassette Recorder

    1. Controls and functions ...................................................................................................2 2. Electrical adjustments 2-1. Servo circuit adjustment method .......................................................................................3 2-2. Audio circuit ad...

  • Page 5: 1. Control and Functions

    1. Control and functions front dv-k11wz-pb/a dv-k11wy-pb (hi-fi) dv-k11wz-qb/a (normal) rear 2 play auto repeat rec digital echo vol 1 vol 2 mic 1 mic 2 pause/still rew play ff l hi-fi r cst.In ntsc a.Repeat rec dv-k11w power stop/eject ntsc play back recording • high speed rewind # play auto repeat...

  • Page 6: 2. Electrical Adjustment

    Servo circuit adjustment method video head switching position ! Connection method @ adjustment procedure 1. Play back the test tape.(stair step dp-2) 2. Set the oscilloscope in the chop mode. Connect ch1 to the sw pulse(pt01 pin#), and ch2 to the video out(r305 ) and trigger the scope with signal fr...

  • Page 7

    Audio circuit adjustment method audio record bias ! Connection method @ adjustment procedure 1. Set the power on mode. 2. Set the input to open mode 3. Connect the audio level meter to r01 4. After inserting a blank tape, record in sp mode. 5. Adjust r292 to obtain 3.0 mvrms. 4 adjustment parts chec...

  • Page 8

    3. Trouble shooting flow chart power circuit • when change the parts which are out of order, first, remove the power plug from the socket and then discharge the voltage across between both terminals of c807. (use an external scores of k Ω resistance) • when check the primary circuit by using the osc...

  • Page 9

    6 is voltage supplied via cn11? The voltage of #1 of ic11 is 5.7v and stable the voltage of #1 of ic11 fluctuate in 4.8v~5.7v measure resistance between gnd of cn21 and each terminal of cn21 the 12dc of each wire of t11 is ok primary parts is ok secondary parts ok change t11 change parts out of orde...

  • Page 10

    Servo syscon circuit 7 58 the voltage of pin of ic601 is not changed. Is ctl pulse input to pin ic501 7 20 check and re-adjust the path of deck. Check circuit adjacent to ic601 check c503, c504, c506 check r539, c518 check ic601 yes yes yes yes yes yes yes no no no no no no noise appears although ad...

  • Page 11

    8 playback picture is not good. Noise appears on the screen on the whole. Is enve.Wavefrom supplied to at pin of pt01 4 are sw pulse applied to headamp circuit? Check video circuit. Check flow a is sw pulse supplied from pin of ic601? 23 check d.Pg input and connector. Check pattern check connector,...

  • Page 12

    9 is motor 12v supplied? Is pin d.Fg of ic601 supplied. Is pin d.Pwm (pin ) of ic601 supplied? Check connector and motor. 17 30 check power module check c509, r523 check ic601 yes yes yes no no no drum m/t loading stops. D is the input of pin of pj502 2v-3.5v? Is pin of pj502 2.5v is pin (c.Pwm) of ...

  • Page 13

    10 is c. Sync applied to pin of ic601? Check motor. Check c. Sync of ic 401 and pattern no yes no drum m/t and capstan m/t rotate at regular speed. (in rec mode) 8 f is ever 5v supplied? Does x601 crystal osciliate? Is cam sw data correct? Check ic502. Check ic 601. Check power circuit. Check ic601 ...

  • Page 14

    11 cassette is not inserted. Is motor 12v supplied? Check power circuit cam data is changed when cst in? Is 5v applied to pin of ic502 when cst in? Chek ic502 check connector. Check deck part. Is 5v supplied at pin of ic601? Check pattern check ic601 no yes yes yes no no no no yes 4 37 h.

  • Page 15

    12 audio circuit (normal) no sound in the playback mode. Is the output at pin ‘ of ic201? Is 9v applied to pin & of ic201? Check power circuit. Is 5v applied to 1 of ic201? Is there audio output at pin of ic201? Check pj504 and head. Check circuit adjacent to r211, r212 no no yes yes yes yes no no i...

  • Page 16

    13 is the signal applied to pin 6 of ic201? Is 5v applied to pin = of ic201? Is there output at pin “ of ic201? Does t201 oscillate? Check ic601. Check ic201. Is the voltage above 10v at pin # of t201? Check t201 is record current 3.0mvrms? Is pin of ic201 0v? Clean head. Asjust record current. Chec...

  • Page 17

    14 audio circuit (hi-fi) no sound in the e-e mode. Is 12v applied to pin a of ic901? Is signal input into pin ^ , & of ic901 in line mode? Check phone jack yes yes yes no no is 5v applied to pin 3 g of ic901? No check power circuit is 5v and clock data applied to pin 4 , 5 of ic901? Check ic601 yes ...

  • Page 18

    15 is the enve level of c919 more than 120mvp-p? Is a.Sw pulse input into pin j of ic901? Is 5v and clock data applied to pin 4 , 5 of ic901? Is signal input into pin s , k of ic901 check pin = of ic601 check ic601 is there output at s , k of ic901? Is there output at pin “ , ‘ of ic901 check phone ...

  • Page 19

    16 video circuit is video signal input into pin of ic301? 31 is signal output from pin of ic301? Is 5v supplied to pin and of ic301? 26 54 check power circuit is serial clock and data signal input into pin , of ic301? Check ic601 , pin 1 check rf out check line out yes yes yes no no no 14 15 no yes ...

  • Page 20

    17 is the video signal from pin of ic301? No yes check phone jack 31 is on/off 5v supplied to pin and pin of ic301 at 5volts? No yes check 5v circuit (ic801, q802, q803) 26 54 is rec(h) supplied to anode of da01 at 4.2 volt? No yes check ic601 pin is the down-converted color signal obtained from pin...

  • Page 21

    18 no yes check phone jack and pattern is on/off 5v supplied to pin and pin of ic301 at 5volts? No yes check on/off 5v circuit (ic801, q802, q803) is rec(h) supplied to anode of da01 at 4.2volt? No yes check ic601 pin is the video signal from pin of ic301 fed to pin of ic301? No yes check ic301 is t...

  • Page 22

    19 is pb-fm signal from hea damp fed to pin of ica01? No yes check head amp circuit is on/off 5v supplied to pin and pin of ic301 at 5volts? No yes check on/off 5v circuit. 26 is rec(h) supplied to anode of da01 at 0volt? No yes check ic601 pin is y-fm signal from pin of ica01 fed to pin of ic301? N...

  • Page 23

    20 is the pal color signal from pin of ica01 fed to pin of ic301 through amp circuit? No yes check head amp circuit is on/off 5v supplied to pin and pin of ic301 at 5volts? No yes check on/off 5v circuit is qv sync supplied to anode of d301 at 0 volts? No yes check qv sync is the pal color signal fr...

  • Page 24

    21 is the miexd modulating luminance signal and down converted color signal obtained from pin of ica301? No yes check rec y eq and ra04 and pattern is on/off 5v supplied to pin of ica01 at 5volts? No yes check on/off 5v circuit is rec (h) supplied to pin of ica01 at 4.2volts? No yes check ic601 pin ...

  • Page 25

    4. Waveforms on video circuit waveforms of the luminance and color in the record mode (color bar input) 22 ¤ video input signal (500mv/10ms) pin r of ic301 (pal color bar input: 1.0vp-p) ¤Ł ccd input signal (100mv/10ms) pin y of ic301 (0.5vp-p) ¤Ø ccd output signal (100mv/10ms) pin y of ic301 (0.5vp...

  • Page 26

    Waveforms of the pal luminance and color in the pb mode (dp-1 test tape) 23 ¤ playback enve (200mv/5ms) pin s of ic301 ¤Ł ccd input signal (100mv/10ms) pin y of ic301 ¤Ø ccd output signal (100mv/10ms) pin y of ic301 ¤Œ video output signal (500mv/10ms) pin w of ic301 ¤º color burst signal (100mv/10ms...

  • Page 27

    Waveforms of the servo/syscon circuit 24 £ 1v/10ms £ 1v/10ms £ 1v/10ms £ 1v/10ms £ 1v/10ms £ 1v/10ms £ 1v/10ms £ 1v/10ms.

  • Page 28: 5. Μ-Com Port

    5. µ-com port 25 no port i/o port name port function initial 1 p40 o v. Clk video serial clock 2 p41 o v. Data video serial data 3 p42 o sp (l), ep (m), lp (h) 4 p43 o amute_h audio mute output 5 p44 o pwr on (l) power on (l) output 6 p45 i/o hifi_dat hifi ic control i 2 c bus data 7 p46 i s_reel.P ...

  • Page 29

    26 no port i/o port name port function initial 33 p27 o auto repeat led auto repeat led output 34 p26 o record led record led output 35 p25 o no-col-kil (h) tv/vcr led output 36 p24 o ee (l) ee mode output 37 p23 o not used 38 p22 o hifi_clk hifi ic control i 2 c bus clock 39 p21 o tv (h)/vcr (l) in...

  • Page 30

    27 6. Circuit diagram connection diagram.

  • Page 31

    28 power circuit diagram.

  • Page 32

    29 servo/syscon circuit diagram.

  • Page 33

    30 video & head-amp circuit diagram.

  • Page 34

    31 audio circuit diagram.

  • Page 35

    32 hi-fi audio circuit diagram.

  • Page 36

    33 karaoke circuit diagram.

  • Page 37

    34 logic sw circuit diagram.

  • Page 38

    37 8. Disassembly packing ass'y no. Part no. Part name q'ty description remark 1 97p4921800 pad front/back 1 eps 2 97p4803100 polybag for set 1 p.E foam 3 97p8040700 box carton 1 ex300*scp150*ex300 4 97p9560000 manual owners 1 art paper 5 97p880rp15 cable rf 1 pal 1.5m 6 97p0424100 cover accessory 1...

  • Page 39

    38 set ass'y no. Part no. Part name q'ty description remark 1 97p0463300 cover top 1 secc t0.7+pt fc23227-c 2 7173401212 screw tapptite 3 tt2 bin 4x12 bl mfzn cover/t fix 3 7173401211 screw tapptite 3 tt2 bin 4x12 mfzn deck fix 4 7174301011 screw tapptite 1 tt2 rnd 3x10 mfzn deck fix 5 97pb0887d– de...

  • Page 40

    39 pan ass'y no. Part no. Part name q'ty description remark 1 97p0315700 panel front 1 hi-ps 2 97p1618300 window front 1 pmma 3 97p1349600 knob function 1 abs 4 97p1711600 indicator power 2 ge-ps 5 97p1816500 door f/l 1 abs 6 97p3040000 spring f/l door 1 swpb 7 97p1711500 indicator led 1 gp-ps 8 97p...

  • Page 41: 9. Electrical Parts List

    9. Electrical parts list standard part number coding •••••• resistor coding 1. Fixed resistor coding 2. Semi-fixed resistor coding 40 type of resistor c composition resistor d carbon resistor f fusible resistor k ceramic resistor n metal film resistor s metal-oxide film resistor w wire wound resisto...

  • Page 42

    • • • • • • capacitor coding 1. Normal 2. Temperature compensation • • • • • • fuse coding 41 type code type a aluminum b barrier layer c ceramic e electrolytic l line across m mylar s styrol n metalized polyester q mica oil t tantal voltage code voltage 0j 6.3v 1a 10v 1c 16v 1d 20v 1e 25v 1v 35v 1g...

  • Page 43

    Pcb main as 42 loc. Part code part name part-desc cn11 97p6284000 conn wafer yfaw025-105 angle 3.5x4 cn21 97p6284300 conn wafer yfaw025-108 angle 3.5x4 c15 ch1tee472m c cer a ac 2.5kv 4700pf m aa ac250 c16 ch1tee472m c cer a ac 2.5kv 4700pf m aa ac250 c22 cexf1a471f c ele ctro 10v rx 470mf 10x1 6 c2...

  • Page 44

    43 loc. Part code part name part-desc sw501 5s70101059 sw micro sppb62 s601 97p0s01800 sensor reel sg-239s s602 97p0s01800 sensor reel sg-239s s603 tst5811--- tr photo st-5811(d-rank) s603a 97p2338200 holder tr abs s604 tst5811--- tr photo st-5811(d-rank) s604a 97p2338200 holder tr abs t201 56040200...

  • Page 45

    44 loc. Part code part name part-desc c313 cxsl1h151j c cera 50v sl 150pf j c315 cexf1h478a c electro 50v rsm 0.47mf 4x7 c316 cexf1h108a c electro 50v rsm 0.1mf 4x7 c320 cexf1a470a c electro 10v rsm 47mf 5x7 c321 cexf1h228a c electro 50v rsm 0.22mf (4x7) c322 cexf0j471v c electro 6.3v rss 470mf 8x11...

  • Page 46

    45 loc. Part code part name part-desc l310 5cpx330j-- coilpeaking 33uh j (radial) l311 5cpx330j-- coilpeaking 33uh j (radial) l312 5cpx820j-- coilpeaking 82uh j (radial) l313 5cpx271j-- coilpeaking 270uh j radial l901 5cpx223k-- coilpeaking 22mh k tapping l902 5cpx101j-- coilpeaking pl 100uh j (tapp...

  • Page 47

    46 loc. Part code part name part-desc c403 cczb1h102k c cera 50v b 1000pf k (axial) c405 cczb1h102k c cera 50v b 1000pf k (axial) c505 cczb1h221k c cera 50v b 220pf k (axial) c507 cczb1h102k c cera 50v b 1000pf k (axial) c508 cczb1h102k c cera 50v b 1000pf k (axial) c509 cczb1h102k c cera 50v b 1000...

  • Page 48

    47 loc. Part code part name part-desc rw03 rd-az153j- r car bon film1/6 15k ohm j rw04 rd-az102j- r car bon film1/6 1k ohm j rw05 rd-az473j- r car bon film1/6 47k ohm j rw06 rd-az153j- r car bon film1/6 15k ohm j rw07 rd-az472j- r car bon film1/6 4.7k ohm j rw08 rd-az332j- r car bon film1/6 3.3k ohm...

  • Page 49

    48 loc. Part code part name part-desc r404 rd-az103j- r car bon film1/6 10k ohm j r405 rd-az333j- r car bon film1/6 33k ohm j r501 rd-az273j- r car bon film1/6 27k ohm j r502 rd-az201j- r car bon film1/6 200 ohm j r504 rd-az912j- r car bon film1/6 9.1k ohm j r505 rd-az472j- r car bon film1/6 4.7k oh...

  • Page 50

    49 pcb logic as loc. Part code part name part-desc j02 97p8810716 connas "7h-7s, 160mm" rv01 5v1203011b vr rotary v09hc015fb20k rv02 5v1203011b vr rotary v09hc015fb20k loc. Part code part name part-desc rv03 5v1203011b vr rotary v09hc015fb20k uv01 97p65141va pcb volume 164x164x1.6t/8(dv-k11w) pcb vo...

  • Page 51

    50 mono audio option table (dv-k11wz-qb/a) loc. Part code part name part-desc ic201 1ba7790lsk ic au dioba7790ls pa01 97p6289590 conn hou.00-8370-041-000-80 pj01 97p6307500 jack pindspm-8907-04 c202 ccxb2h221k c cer a500v b 220pf k (tapping c203 cexf1c470a c ele ctro16v rsm 47mf (5x7) tp c204 cmxm2a...

  • Page 52: Service Manual

    Service manual daewoo electronics co., l t d overseas ser vice dept . Deawoo electronics co., ltd 686, ahyeon-dong mapogu, seoul, korea. C.P.O. Box 8003 seoul korea telex: dwelec k28177-8 cable:"daewooelec" fax: +82.2.364-5588 tel: +82.2.360-7114, 8114 http://www.Dwe.Daewoo.Co.Kr version 1.0 printed...