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  5. Service Manual

Daewoo DLP-26C2 Service Manual

Summary of DLP-26C2

  • Page 1

    Caution : in this manual, some parts can be changed for improving. Their performance without notice in the parts list. So, if you need the latest parts information, please refer to ppl(parts price list)in service information center. Service manual lcd tv chassis : model : s/m no. : dsl223pef0 sl-223...

  • Page 2: Contents

    Contents 1. Safety precautions 3 2. Product specification 4 2-1. Product specification 4 2-2. Available input signal 6 3. Block diagram 7 4. Description of each block 8 4-1. Block diagram of main ic and tp 8 4-2. Overview 9 4-2-1. Composite video, y/c(s-video) and scart(cvbs, rgb) composite video 9 ...

  • Page 3: 1. Safety Precautions

    -3- 1. Safety precautions (1) when moving or laying down a lcd set, please deal with care. Avoid any impact towards the lcd set. (2) do not leave the broken lcd set on for a long time. To prevent any further damages, after check the broken set’s condition, make sure to turn the power(ac) off. (3) wh...

  • Page 4: 2. Product Specification

    -4- 2. Product specification 2-1. Product specification features dlp-26c2amsb dlp-32c2amsb lcd panel screen size 26” 32” aspect ratio 16 : 9 16 : 9 resolution 1366 x 768(wxga) 1366 x 768(wxga) pixel pitch 0.4215mm 0.51075 contrast ratio 1000 : 1 800 : 1 tv system receiving system pal, secam pal, sec...

  • Page 5: Product Specification

    Product specification -5- features dlp-37c3lmbs dlp-42c1lmr lcd panel screen size 37” 42” aspect ratio 16 : 9 16 : 9 resolution 1366 x 768(wxga) 1366 x 768(wxga) pixel pitch 0.2mm x 0.6mm x rgb 0.227mm x 0.681mm x rgb contrast ratio 800 : 1 550 : 1 tv system receiving system pal, secam pal, secam st...

  • Page 6: Product Specification

    Product specification -6- 2-2. Available input signal 2-2-1. Hdmi/ pc/component 2-2-2. Video - pal, pal-m, pal-n - ntsc, ntsc4.43 - secam resolution v-freq hdmi pc(d-sub) component standard 60hz o o x 640 x 480 72hz o o x 75hz o o x vesa standard 60hz o o x vesa standard 800 x 600 72hz o o x vesa st...

  • Page 7: 3. Block Diagram

    -7- 3. Block diagram.

  • Page 8: 4. Description of Each Block

    -8- 4. Description of each block 4-1. Block diagram of main ic and tp.

  • Page 9: Description of Each Block

    -9- 4-2. Overview digital pcb is multi media circuit board that can process various input signals such as video, component, pc, hdmi, and analog tv signal. 4-2-1. Composite video, y/c(s-video) and scart(cvbs, rgb) composite video - flow chart of rf, video, s-video signal description of each block.

  • Page 10: Description of Each Block

    -10- description of each block y signal(input to ic505) location : cc451 color signal(input to ic505) location : cc456.

  • Page 11: Description of Each Block

    Description of each block -11- cvbs signal(input to ic505) location : cc455 4-2-2. Dtv/dvd signal y signal(input to ic505) location : cc445.

  • Page 12: Description of Each Block

    Description of each block -12- pb signal(input to ic505) location : cc446 pr signal(input to ic505) location : cc447.

  • Page 13: Description of Each Block

    Description of each block -13- g signal(input to ic505) location : cc452 b signal(input to ic505) location : cc453 4-2-3. Pc(personal computer) signal r signal(input to ic505) location : cc454.

  • Page 14: Description of Each Block

    Description of each block -14- horizontal sync(output of ic505) location : rc458 vertical sync(output of ic505) location : rc459.

  • Page 15: Description of Each Block

    Description of each block -15- 4-2-4. Hdmi signal location : rc465, rc466, rc467, rc468, rc469, rc470, rc471, rc472 4-2-5. R/g/b processing(scart1, teletext r/g/b) r signal (input to ic505) location : rc450

  • Page 16: Description of Each Block

    Description of each block -16- g signal(input to ic505) location : rc448 b signal(input to ic505) location : rc449.

  • Page 17: Description of Each Block

    Description of each block -17- 4-2-6. Audio signal processing, key, and led - flow chart of audio signal comp-l sound location : za225.

  • Page 18: Description of Each Block

    Description of each block -18- ic602 output location : l606, l610 ic602 input location : rc685, rc687.

  • Page 19: Description of Each Block

    -19- description of each block headphone out location : rc611, rc612 sif input location : cc654.

  • Page 20: Description of Each Block

    -20- description of each block i2s input location : rc622(clk) spdif out location : rc655.

  • Page 21: Description of Each Block

    -21- description of each block remote control signal location : rc722 location : rc623(ws).

  • Page 22: Description of Each Block

    -22- description of each block output minimum maximum output current board voltage output output condition voltage voltage min nor max +29vdc +27.0vdc +32.0vdc 0.1a 0.5a 1a +24vdc +22.3vdc +25.4vdc 0.1a 6.0a 7.0a pwr-ctl dep +12vdc +11.00vdc +12.00vdc 0.1a 1.5a 2.0a on +5vdc +4.75vdc +5.25vdc 0.1a 1...

  • Page 23: Description of Each Block

    -23- description of each block 4-3-2. Connectors a. Cn7, cn8 pin spec(yen-ho 20010ws-14 14p) b. Cn5, cn6 pin spec(yeon-ho 20010ws -12 12p) cn7(auo pannel) pin no. Output 1 +24v 2 +24v 3 +24v 4 +24v 5 +24v 6 gnd 7 gnd 8 gnd 9 gnd 10 gnd 11 dimiming 12 inv on/off 13 n/c 14 gnd cn5, cn6(lg pannel) pin ...

  • Page 24: Description of Each Block

    -24- description of each block d. Cn4 pin spec(yeon ho smw025-09 9p) pin no. Output 1 +12v 2 +12v 3 gnd 4 gnd 5 +5vs 6 pwr on/off 7 gnd 8 gnd 9 +5vs e. Cn3 pin spec(ca3237w-300-08p) pin no. Output 1 dimiming 2 inv on/off 3 n/c 4 gnd 5 gnd 6 +5vs 7 +5vs 8 +12v c. Cn2 pin spec(yeon-ho yw025-04 4p) pin...

  • Page 25: 5. Service Mode

    5. Service mode -25- 5-1. Checking initial menu data 5-1-1. Check initial data of user menu a. Picture - mode : standard - brightness : 32 - contrast : 58 - color : 32 - sharpness : 32 - tint : 0 - colourtemp : normal b. Screen - aspect : 16:9 c. Sound - mode : news - 100hz : 0 - 300hz : 0 - 1khz : ...

  • Page 26: Service Mode

    Service mode -26- • name : _____ • system : pal • sound : bg • fine tuning : 0 - edit 5-2. Entering service mode using the service remote controller, you can enter service mode directly. 5-2-1. Adjustment remocon and eeprom initial data a. The adjustment specification use the service remocon r-34svc...

  • Page 27: Service Mode

    Service mode -27- key name details function remark default adjustment default adjustment video sub bri 35 fix do not use video sub cont 118 fix do not use video sub cb 112 fix do not use video sub cr 112 fix do not use video sub hue 0 fix do not use video yc delay 0 fix do not use pedestal level on ...

  • Page 28: Service Mode

    Service mode -28- 5-2-2. Description of service mode item a. S1(1) : heat-run key b. S2(2) : gumi channel map write c. S3(3) : volume test => this key can check sound d. S4(4) : edie write => using this key, you can update edid data. E. S5(5) : panel test => using this key, you can test problem of p...

  • Page 29

    6. White balance adjusting method -29- to adjust white balance, refer to below process. 6-1. Insert white pattern to component input signal generator : 802bt (by quantum data) resolution : 1280x720p @60hz, pattern : grey scale (11 step) 6-2. Confirm ‘dimming’ in service mode (=s10) 32c3 = 0, 26c3 = ...

  • Page 30

    7. Main pcbs trouble diagnosis -30- 7-1. Main pcb trouble diagnosis 7-1-1. Common checking process when “no signal of noraster” no signal : osd is working but no images are displaying no raster : osd as well as images in not working check start y y y y y y y n n n n n n n does no signal screen appea...

  • Page 31: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -31- a. When “no signal” in cvbs(rf, av) 1) first check if other inputs are working -> if other inputs are not working, replace main pcb 2) checking waveforms with color bar pattern(using the oscilloscope) - main tp(rf) : cc455, c102 - main tp(av) : lc205, cc444.

  • Page 32: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -32- b. When “no signal” in y/c signal(s-video) 1) first check if other inputs are working -> if other inputs are not working, replace main pcb 2) checking waveforms with color bar pattern(using the oscilloscope) - main tp(y signal) : cc451 - main tp(c signal) : lc202, cc...

  • Page 33: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -33- c. When “no signal” in y/pb/pr signal(component) 1) first check if other inputs are working -> if other inputs are not working, replace main pcb 2) checking waveforms with color bar pattern(using the oscilloscope) - main tp(comp1_y) : cc445, lc224, lc221 - main tp(co...

  • Page 34: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -34- d. When “no signal” in pc 1) first check if other inputs are working -> if other inputs are not working, replace main pcb 2) checking waveforms with color bar pattern(using the oscilloscope) - main tp(r signal) : lc217, cc454 - main tp(comp1_pr) : cc447, lc226, lc223.

  • Page 35: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -35- - main tp(g signal) : cc452, lc218 - main tp(b signal) : lc219, cc453 - main tp(h-sync) : rc458.

  • Page 36: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -36- - main tp(v-sync) : rc459 e. When “no signal” in hdmi 1) first check if other inputs are working -> if other inputs are not working, replace main pcb 2) checking waveforms with color bar pattern(using the oscilloscope) - main tp : rc465, rc466, rc467, rc468, rc469, r...

  • Page 37: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -37- 7-1-2. When no sound a. Overview check start do images displ-ay on screen? 1.Check ac connection 2.Check power s/w on 3.Check main pcb check sound mute on? Cancel sound mute is the speaker con-nection connected? Check the connection of speaker check rc685, rc687 perh...

  • Page 38: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -38- 1) first check if images are displaying -> if images are not displaying, replace main pcb 2) checking waveforms with 1khz sound pattern b. Main tp - input to ic601 : cc614, cc615(scart 1) , cc612, cc613(scart2), cc611, cc610(av), cc650, cc651(comp), cc625 ,cc626(pc l...

  • Page 39: Main Pcbs Trouble Diagnosis

    7-1-3. When control key does not operate a. First check connection, and then check the output of first pin of pa912(st-by 3.3v) b. Check waveform first pin and third pin of pa911. If waveform does not appear, replace connector or key pcb. -main tp : rc398, rc399 check start after turn on the power, ...

  • Page 40: Main Pcbs Trouble Diagnosis

    7-1-4. When remote controller does not operate. A. Check the connection between main pcb and led pcb. B. Check the waveform first pin(ir) of pa912 to confirm ir operation. If ir is not working, replace the led pcb. Check start after turn on the power, does led turn on red light? 1. Check ac connecti...

  • Page 41: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -41- remote control signal (first pin of pa912).

  • Page 42: Main Pcbs Trouble Diagnosis

    Main pcbs trouble diagnosis -42- 7-2. Power pcb check start after turn on the power, does led turn on light? After power on, does picture on? Replace power pcb 1.Check ac connection 2.Check power s/w on 3.Check f801(f1) 4.Check c811(c23) 5.Check p802(cn4)5vpin 6.Check the connector 1.Check the conne...

  • Page 43: 8. Trouble Diagnosis

    -43- 8. Trouble diagnosis 8-1. Facts you must know when trouble diagnosing or repairing. A. Trouble diagnosing and repairing of set mean find out which pcbs or blocks are not working and replace them with new pcbs. Repairing the broken pcbs are not necessary. Keep the broken pcbs and return them to ...

  • Page 44: Trouble Diagnosis

    -44- trouble diagnosis 8-2. Typical symptoms of pcbs problem or bad connection a. Symptom of initial latch up - define initial latch up : when turn on the power, both leds light up red and tv is not working. - repairing method : this is typical symptom when rom(icu3) is incorrectly connected at sock...

  • Page 45: 9. Structure of Lcd Set

    -45- 9. Structure of lcd set component picture remark lcd panet all connector connection power board main board.

  • Page 46: Structure of Lcd Set

    -46- structure of lcd set component picture remark front mask back cover stand.

  • Page 47: 10. Exploded View

    10. Exploded view -47- dlp-26c2.

  • Page 48: Exploded View

    Exploded view -48- dlp-26c3.

  • Page 49: Exploded View

    Exploded view -49- dlp-32c2.

  • Page 50: Exploded View

    Exploded view -50- dlp-32c3.

  • Page 51: Exploded View

    Exploded view -51- dlp-37c3.

  • Page 52: Exploded View

    Exploded view -52- dlp-42c1.

  • Page 53: 11. Part List

    -53- 11. Part list zz100 48b5454d06 transmitter remocon r-54d06 (aaa) zz110 ptacpwg151 accessory as dlp-26c3ambs 60 4850q01210 battery lr03 aaa alkaline m212 4852176101 cover bottom abs bk m681 4856819300 clamp wire nylon 66 m821 4858213803 bag instruction l.D.P.E to.05x250x400(+20) m861 48586210e1 ...

  • Page 54: Part List

    -54- part list cc476 hcbk104kba c chip cera 50v x7r 0.1mf k 1608 cc477 hcbk104kba c chip cera 50v x7r 0.1mf k 1608 cc478 hcbk104kba c chip cera 50v x7r 0.1mf k 1608 cc479 hcbk104kba c chip cera 50v x7r 0.1mf k 1608 cc480 hcbk104kba c chip cera 50v x7r 0.1mf k 1608 cc481 hcbk104kba c chip cera 50v x7...

  • Page 55: Part List

    -55- part list c552 cexf1c220a c electro 16v rsm 22mf (5x7) c555 cexf1c220a c electro 16v rsm 22mf (5x7) c563 cexf1c470a c electro 16v rsm 47mf (5x7) tp c585 cexf1c100a c electro 16v rsm 10mf 5x7 c601 cexf1c101v c electro 16v rss 100mf (6.3x11) tp c627 cexf1c100a c electro 16v rsm 10mf 5x7 c628 cexf...

  • Page 56: Part List

    -56- part list cc686 hcff474zba c chip cera y5v 16v 0.47mf z 1608 cc701 hcqk200jba c chip cera 50v ch 20pf j 1608 cc702 hcqk200jba c chip cera 50v ch 20pf j 1608 cc703 hcqk101jba c chip cera 50v ch 100pf j 1608 cc704 hcbk104kba c chip cera 50v x7r 0.1mf k 1608 cc707 hcbk103kba c chip cera 50v x7r 0....

  • Page 57: Part List

    -57- part list lc593 hff300b01a f chip ferrite bead 30 ohm upb 1608 lc594 hff300b01a f chip ferrite bead 30 ohm upb 1608 lc595 hff300b01a f chip ferrite bead 30 ohm upb 1608 lc711 hffh1m501b f chip ferrite bead hh-1m3216-501j lc754 hff300b01a f chip ferrite bead 30 ohm upb 1608 lc931 hff300b01a f ch...

  • Page 58: Part List

    -58- part list rc446 hrft470jba r chip 1/10 47 ohm j 1608 rc447 hrft470jba r chip 1/10 47 ohm j 1608 rc448 hrft100jba r chip 1/10 10 ohm j 1608 rc449 hrft100jba r chip 1/10 10 ohm j 1608 rc450 hrft100jba r chip 1/10 10 ohm j 1608 rc451 hrft100jba r chip 1/10 10 ohm j 1608 rc452 hrft100jba r chip 1/1...

  • Page 59: Part List

    Part list -59- rc718 hrft101jba r chip 1/10 100 ohm j 1608 rc719 hrft101jba r chip 1/10 100 ohm j 1608 rc720 hrft472jba r chip 1/10 4.7k ohm j 1608 rc721 hrft101jba r chip 1/10 100 ohm j 1608 rc722 hrft101jba r chip 1/10 100 ohm j 1608 rc723 hrft101jba r chip 1/10 100 ohm j 1608 rc724 hrft101jba r c...

  • Page 60: Part List

    Part list -60- i801 1fa5501ap- ic fa5501ap i802 pta3sw3100 heat sink ass`y 1strt2268- + 7128301252 00001 1strt2268- ic power str-t2268 0000a 4857033100 heat sink al ex bk 0000b 7174300851 screw tapptite tt2 rnd 3x8 mfzn 3cr i803 1ltv817c-- ic photo coupler ltv-817c i804 1ltv817c-- ic photo coupler l...

  • Page 61: Part List

    Part list -61- rs803 rs01z823j- r m-oxide film 1w 82k ohm j (tapping) zz200 ptpwjrg116 pcb power radial as dlp-32c2amsb c812 ccxr3a101k c cera 1kv r 100pf k c815 cmxm2a223j c mylar 100v 0.022mf j tp c816 cexf1h109v c electro 50v rss 1mf (5x11) tp c817 cmxl1j105j c mylar 63v meu 1mf j c818 cmxm2a102j...

  • Page 62: Part List

    Part list -62- a001 pcb union 122.5x51(330x246/2x4) d1b ptunjag117 a001 pcb union 189x235.5 ptunj1g151 c996 c cera 50v f 0.1mf z axl(1608) ptunjag117 cc293 c chip cera 50v x7r 0.1mf k 1608 ptunj1g151 ic290 ic preamp tsop34838sj ptunswg151 ic703 ic preamp tsop34838sj ptunswg117 m191 cover assy c2 sta...

  • Page 63: Part List

    Part list -63- m191a screw tapptite tt2 was 3x10 mfzn bk 3cr ptcacag155 m201 mask front hips bk ptfmsjg146 m201 mask front hips bk ptfmsjg155 m201b screw tapptite tt2 bin 3x10 mfzn bk 3cr ptcacag155 m201d screw tapptite tt2 bin 3x10 mfzn bk 3cr ptcacag151 m201d screw tapptite tt2 trs 4x14 mfzn bk 3c...

  • Page 64: Part List

    Part list -64- m723b screw tapptite tt2 bin 3x10 mfzn bk 3cr ptcacag151 m723b screw tapptite tt2 was 3x10 mfzn bk 3cr ptcacag116 m801 box carton dw-3 ptpkcpg146 m801 box carton dw-3 ptpkcpg116 m811 pad eps ptpkcpg146 m811 pad eps ptpkcpg116 m822 bag p.E pe foam t0.5x1050x950 ptpkcpg146 m822 bag p.E ...

  • Page 65: Part List

    Part list -65- 00001 diode bridge gbj606 pta3sw2900 00001 diode fmx-22sl ptb2sw4508 00001 diode fme-210b ptc2sw4508 00001 fet stw20nm60 pte2sw4508 00001 ic power str-t2268 pta3sw3100 00001 ic sw reg la5752 pta2sw4519 0000a heat sink al ex bk ptc2sw4508 0000a heat sink al ex (no anodizing) pta2sw4519...

  • Page 66: Part List

    Part list -66- 00001 diode bridge gbj606 pta3sw2900 00001 diode fmx-22sl ptb2sw4508 00001 diode fme-210b ptc2sw4508 00001 fet stw20nm60 pte2sw4508 00001 ic power str-t2268 pta3sw3100 00001 ic sw reg la5752 pta2sw4519 0000a heat sink al ex bk ptc2sw4508 0000a heat sink al ex (no anodizing) pta2sw4519...

  • Page 67: 12. Circuit Diagram

    12. Circuit diagram -67-.

  • Page 68: Circuit Diagram

    Circuit diagram -68-.

  • Page 69: Circuit Diagram

    Circuit diagram -69-.

  • Page 70: Circuit Diagram

    Circuit diagram -70-.

  • Page 71: Circuit Diagram

    Circuit diagram -71-.

  • Page 72: Circuit Diagram

    -72- circuit diagram.

  • Page 73: Circuit Diagram

    Circuit diagram -73-.

  • Page 74

    Daewoo electronics corp. 686, ahyeon-dong, mapo-gu, seoul, korea. C.P.O. Box 8003 seoul korea printed date : oct. 2006.