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Daewoo 902D Service Manual - Technical Information

Other manuals for 902D: Manual
Manual is about: XGA COLOR MONITOR

Summary of 902D

  • Page 1

    Daewoo electronics co., ltd. Http : //svc.Dwe.Co.Kr may, 2000 service manual xga color monitor model : 902d/903ds/904df.

  • Page 2: Technical Information

    6 ◆ power ic, transistor or devices removal/replacement 1. Heat and remove all solders from the device leads. 2. Remove the heatsink mounting screw (if applicable). 3. Carefully remove the device from the circuit board. 4. Insert new device in circuit board. 5. Solder each device lead and then clip ...

  • Page 3: General Information

    Adj adjustment afc automatic frequency control crt cathode ray tube def deflection d.Y deflection yoke fbt flyback transformer h.Sync horizontal synchronization osc oscillator p.S.U power supply unit pwa printed circuit board wiring assembly r.G.B red, green, blue v.Sync vertical synchronization 7 g...

  • Page 4: Pin Connector

    Pin signal 1 red 2 green 3 blue 4 gnd 5 gnd 6 gnd - red 7 gnd - green 8 gnd - blue 9 +5vdc 10 gnd - h.Sync 11 gnd - v.Sync 12 bi-directional data (sda) 13 horizontal sync 14 vertical sync (vclk) 15 data clock (scl) 8 • degaussing is always required when adjusting purity or convergence. • the white b...

  • Page 5: Operation and Adjustment

    9 operation and adjustment control panel • move cursor to the right window on the osd window. • increase the value of any selected function. • move cursor to the left window on the osd window. • decrease the value of any selected function. • launch osd(on-screen display) menu window. • move cursor t...

  • Page 6: Key Process

    10 key process • when you choose the icon on the osd window, you can exit the osd screen. Hot key brightness contrast deutsch engl sh espaÑol franca s tal ano start menu.

  • Page 7: Osd Functions

    11 adjust the width (horizontal size) and the height (vertical size) of the display. H. Size & v. Size h. Linearity v. Linearity adjust the horizontal linearity. Adjust the vertical linearity. Select language for osd (5 languages). Language adjust the position of the display horizontally(left or rig...

  • Page 8

    12 adjust the parallelogram when the screen is leaning left or right. Adjust the rotation when the screen is tilted left or right. Adjust the pin s control when the sides of the screen are in a s shape. Rotation pin s control parallelogram adjust the trapezoid of the screen by moving the lines inwar...

  • Page 9: Alignment Procedure

    13 ◆ standard adjustment conditions 1. Power source voltage : ac 100 - 240vac, 50/60hz. 2. Aging : take at least 15 minutes warm-up time. 3. Signals. Video : analog 0.7vpp 75w terminal positive polarity synchronizing : composite h+v sync : 1.0vpp ~ 5.0vpp (positive / negative) separate h, v sync : t...

  • Page 10

    14 (k) select 6550°k on the osd menu and set the color coordinates in x=0.313, y=0.329 at the maximum contrast control and center brightness control (l) check if a full white pattern is over 27ft/l. 5. Static convergence adjustment (a) apply a magenta cross hatch pattern on display. (b) adjust the f...

  • Page 11: Troubleshooting Hints

    15 troubleshooting hints 1. No character.

  • Page 12

    16 2. No raster.

  • Page 13

    17 3. A missing color.

  • Page 14

    18 4. Abnormal osd font.

  • Page 15

    19 5. Horizontal output circuit mode scan b+ vga (31.5khz) 45v s.Vga (37.8khz) 60v xga 46k 72v cad 68k 109v 79khz 125v 93khz 135v.

  • Page 16

    20 6. Unstable picture 6-1. Horizontal.

  • Page 17

    21 6-2. Vertical.

  • Page 18

    22 7. Focus.

  • Page 19

    23 7-1. Dynamic focus samsung crt fv h fvv 902d : 320v 180v 903ds : 400v 200v 904df : 350v 180v *.

  • Page 20

    24 8. Convergence.

  • Page 21

    25 9. Abnormal picture 9-1. Horizontal size * at first, adjust controls in the osd menu mode scan b+ vga 45v s.Vga 60v xga 46k 72v cad 68k 109v 79k 125v 93k 135v * the b+ are as follows:.

  • Page 22

    26 9-2. Vertical size.

  • Page 23

    27 10. High voltage output circuit test mode: 91khz.

  • Page 24

    28 11. Side-pincushion circuit.

  • Page 25

    29 12. Power supply unit (p.S.U).

  • Page 26

    30

  • Page 27: Block Diagram

    31 block diagram crt socket crt : samsung 19" d -sub rgb h/v video pre-amp (150mhz) + osd mixer m52743bsp (mitsubishi) osd dwosd06 (myson) crt driver lm2402 (ns) usb - port 1 up stream 4 down stream ac input smps transformer mcu usb function 68hc705bd32 (motorola) h/v osc processor upc1884bct (nec) ...

  • Page 28

    41 schematic diagram 902d deflection (refer to the electrical parts list for 903ds & 904df).

  • Page 29

    42 902dpower (refer to the electrical parts list for 903ds & 904df).

  • Page 30

    43 902dvideo (refer to the electrical parts list for 903ds & 904df).

  • Page 31

    44 exploded view & mechanical parts list 902d.

  • Page 32

    903ds 45.

  • Page 33

    46 904df.

  • Page 34

    47 resistor description example: capacitor description example: fig & part no description index capacitors c102 ccxf1h104z ceramic 50v 0.1µf z c402 ccxb1h331k ceramic 50v 330pf k c105 cmxm 2a224j mylar 100v 0.22µf j allowance c ± 0.25pf d ± 0.5% f ± 1pf j ± 5% k ± 10% p ± 100% ~ 0% z ± 80% ~ – fig &...

  • Page 35: Electrical Parts List

    Loc part-code part-name part-desc note 00010 9979800482 pcb crt t=1.6*155*123 00010 9979800497 pcb control t=1.6*215*36 00010 9979800534 pcb control t=1.6*215*36 904df only 00010 9979800512 pcb main t=1.6*246*330 00010 9979800519 pcb main t=1.6*330*246 00010 9979800535 pcb main t=1.6*330*246 904df o...

  • Page 36

    49 loc part-code part-name part-desc note c155 cmxl2e473j c mylar meu 250v 0.047mf j(tp) c159 cmxm2a222j c mylar 100v 2200pf j (tp) c160 cexf1h109v c electro 50v rss 1mf (5x11) tp c161 cexf1h220v c electro 50v rss 22mf (5x11) tp c162 ccxf1h104z c cera 50v f 0.1mf z c163 ccxb3a471k c cera 1kv b 470pf...

  • Page 37

    50 loc part-code part-name part-desc note c322 cxch1h221j c cera 50v ch 220pf j (tapping) c323 cexf1h100v c electro 50v rss 10mf (5x11) tp c324 cczb1h181k c cera 50v b 180pf k axial c325 cmxm2a104j c mylar 100v 0.1mf j (tp) c401 cmxm2a273j c mylar 100v 0.027mf j (tp) 903ds only c401 cmxm2a473j c myl...

  • Page 38

    51 loc part-code part-name part-desc note c539 cmxm2a222j c mylar 100v 2200pf j (tp) c540 ccxb2h221k c cera 500v b 220pf k (tapping) c541 cmxm2a104j c mylar 100v 0.1mf j (tp) 904df only c541 cmxm2a184j c mylar 100v 0.18mf j c542 cexf1c102v c electro 16v rss 1000mf (10x20) tp c542 cexf1e101v c electr...

  • Page 39

    52 loc part-code part-name part-desc note c819 hcfk103zca c chip cera 50v y5v 0.01mf z 2012 c820 cexd1h229f c electro 50v rnd 2.2mf (5x11) tp c823 hcfk103zca c chip cera 50v y5v 0.01mf z 2012 c824 hcfk103zca c chip cera 50v y5v 0.01mf z 2012 c825 cexf1h470v c electro 50v rss 47mf (6.3x11) tp c828 hc...

  • Page 40

    53 loc part-code part-name part-desc note cw001 9979220075 conn wafer b3b-eh-a st(tilt) cw001 9979220081 conn wafer b2b-eh-a st(tilt) 903ds only cw002 485923272s conn wafer 5267-06a stick type cw003 485923252s conn wafer 5267-04a stick type cw801 9979220021 conn wafer smaw250-06 (angle) cw802 997922...

  • Page 41

    54 loc part-code part-name part-desc note d308 dzn4148--- diode 1n4148 auto 52mm d309 dzn4148--- diode 1n4148 auto 52mm d310 dzn4148--- diode 1n4148 auto 52mm d311 dzn4148--- diode 1n4148 auto 52mm d312 dzn4148--- diode 1n4148 auto 52mm d313 dzn4148--- diode 1n4148 auto 52mm d314 dzn4148--- diode 1n...

  • Page 42

    55 loc part-code part-name part-desc note dz304 ddz5r6bm-- diode zener dz5.6bm dz305 ddz5r6bm-- diode zener dz5.6bm dz306 ddz5r6bm-- diode zener dz5.6bm dz307 ddz5r6bm-- diode zener dz5.6bm dz308 ddz5r6bm-- diode zener dz5.6bm dz309 ddz5r6bm-- diode zener dz5.6bm dz401 ddz5r1b--- diode zener dz-5.1b...

  • Page 43

    56 loc part-code part-name part-desc note ph001 1tlp721gr- ic photo coupler tlp721d4gr pr001 decpac140m posistor ecpac140m290 q021 tktc2073-- tr ktc2073 q022 tztc3207-- tr ktc3207 (auto) q101 tksb546y-- tr ksb546-y q102 tztc3207-- tr ktc3207 (auto) q103 tztc3203y- tr ktc3203y (2120y) q161 tzta1270y-...

  • Page 44

    57 loc part-code part-name part-desc note q584 t1rf640--- fet irf640 q601 tztc3198y- tr ktc3198y-(1815y) (auto) q602 tzta1270y- tr kta1270y(auto)(562y) q801 tztc3202y- tr ktc3202y (auto)(1959y) q802 tksc1009y- tr ksc-1009-y q803 tksa910y-- tr ksa910y q804 tztc3198y- tr ktc3198y-(1815y) (auto) q805 t...

  • Page 45

    58 loc part-code part-name part-desc note r156 rd-az223j- r carbon film 1/6 22k ohm j r157 rd-az103j- r carbon film 1/6 10k ohm j r158 rd-2z221js r carbon film 1/2 220 ohm j small r159 rd-az103j- r carbon film 1/6 10k ohm j r160 rd-az100j- r carbon film 1/6 10 ohm j r161 rd-az102j- r carbon film 1/6...

  • Page 46

    59 loc part-code part-name part-desc note r244 rd-az100j- r carbon film 1/6 10 ohm j r245 rd-4z101j- r carbon film 1/4 100 ohm j r246 rd-az513j- r carbon film 1/6 51k ohm j r247 rd-2z203js r carbon film 1/2 20k ohm j small r250 rd-az182j- r carbon film 1/6 1.8k ohm j r250 rn-az1301f r metal film 1/6...

  • Page 47

    60 loc part-code part-name part-desc note r376 rd-az472j- r carbon film 1/6 4.7k ohm j 904df only r380 rd-az331j- r carbon film 1/6 330 ohm j r381 rd-az331j- r carbon film 1/6 330 ohm j r382 rd-az331j- r carbon film 1/6 330 ohm j r383 rd-az331j- r carbon film 1/6 330 ohm j r384 rd-az331j- r carbon f...

  • Page 48

    61 loc part-code part-name part-desc note r528 rs02z470j- r m-oxide film 2w 47 ohm j (tapping) 904df only r529 rs02z101j- r m-oxide film 2w 100 ohm j (tapping) r529 rs02z470j- r m-oxide film 2w 47 ohm j (tapping) 903ds only r529 rs02z470j- r m-oxide film 2w 47 ohm j (tapping) 904df only r530 rd-2z30...

  • Page 49

    62 loc part-code part-name part-desc note r569 rd-az472j- r carbon film 1/6 4.7k ohm j r571 rd-az472j- r carbon film 1/6 4.7k ohm j r572 rd-az332j- r carbon film 1/6 3.3k ohm j r573 rd-az105j- r carbon film 1/6 1m ohm j r574 rd-az472j- r carbon film 1/6 4.7k ohm j 903ds only r574 rd-az472j- r carbon...

  • Page 50

    63 loc part-code part-name part-desc note r828 rd-az101j- r carbon film 1/6 100 ohm j r829 hrft332jca r chip 1/10 3.3k ohm j 2012 r831 hrft750jca r chip 1/10 75 ohm j 2012 r832 hrft102jca r chip 1/10 1k ohm j 2012 r833 rd-az330j- r carbon film 1/6 33 ohm j r834 hrft220jca r chip 1/10 22 ohm j 2012 r...

  • Page 51

    64 loc part-code part-name part-desc note r888 hrft242jca r chip 1/10 2.4k ohm j 2012 r889 hrft203jca r chip 1/10 20k ohm j 2012 r890 hrft392jca r chip 1/10 3.9k ohm j 2012 r891 rd-az103j- r carbon film 1/6 10k ohm j r892 rd-az124j- r carbon film 1/6 120k ohm j r893 rd-az124j- r carbon film 1/6 120k...