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LG 773N manual

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Table of contents for the manual

  • Page 1

    COLOR MONIT OR SER VICE MANUAL Website:http://biz.LGservice.com E-mail:http://www .LGEservice.com/techsup.html CAUTION BEFORE SERVICING THE UNIT , READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MENU SELECT MODEL: StudioW orks 773N (CB773H-ML) , StudioW orks 773E (CB773H-EL) , (CB773H-NJ) , (CB773H-EJ) , TINY773N (773N Rev B) CHASSIS NO. : CA-1 19 F AC[...]

  • Page 2

    1. PICTURE TUBE Size : 17 inch DefIection Angle : 90° Neck Diameter : 29.1 mm Dot Pitch : 0.27 mm Face Treatment : W-ARASC (Anti-Reflection and Anti-Static Coating) Low Radiation : MPR II, TCO 99 2. SIGNAL 2-1. Horizontal & Vertical Sync 1) Input Voltage Level : Low=0~1.2V, High=2.5~5.5V 2) Sync Polarity : Positive or Negative 2-2. Video Input[...]

  • Page 3

    SAFETY-RELATED COMPONENT WARNING! There are special components used in this color monitor which are important for safety. These parts are marked on the schematic diagram and the replacement parts list . It is essential that these critical parts should be replaced with the manufacturer's specified parts to prevent X-radiation, shock, fire, or o[...]

  • Page 4

    TIMING CHART - 4 - VIDEO SYNC C E D F A B * Mode 1~Mode 4: Basic Mode H – 37.50 26.67 20.32 6.35 2.03 3.81 0.51 V – 74.99 13.335 12.802 0.533 0.080 0.427 0.026 H + 46.88 21.33 16.16 5.17 1.62 3.23 0.32 V + 75.01 13.331 12.798 0.533 0.064 0.448 0.021 H + 53.68 18.63 14.22 4.41 1.14 2.70 0.57 V + 85.07 11.755 11.178 0.577 0.056 0.503 0.018 H + 68[...]

  • Page 5

    - 5 - OPERA TING INSTRUCTIONS MENU SELECT FRONT VIEW REAR VIEW AC Power Socket Signal Connector ID Label Power ON/OFF Button See Front Control Panel Front Control Panel MENU SELECT 5 4 3 1 2 1. Power ON/OFF Button Use this button to turn the monitor ON or OFF. 2. Power Indicator This indicator lights up green when the monitor operates normally; in [...]

  • Page 6

    WIRING DIAGRAM - 6 - P501 P301 P302 G2 P702 P701 T1 P402 P902 S + S Signal Cable AC Socket FBT[...]

  • Page 7

    BLOCK DIAGRAM - 7 - POWER INPUT 100~240VAC (50/60Hz) Line Filter Degaussing Circuit SMPS TRANS (T901) SMPS CONTROL (IC901) DPM CONTROL CIRCUIT Voltage Regulating Circuit 105V 50V 13V 6.3V TILT Control Circuit 6.3V 13V E 2 PROM (IC402) 5V OSD IC (IC301) WT6805 H-Sync Sig V-Sync Sig I 2 C DATA(SDA) I 2 C CLOCK(SCL) VIDEO STV9211 PRE-AMP (IC302) Signa[...]

  • Page 8

    DESCRIPTION OF BLOCK DIAGRAM - 8 - 1. Line Filter & Associated Circuit. This is used for suppressing noise of power input line flowing into the monitor and/or some noise generated in this monitor flowing out through the power input line. That is to say, this circuit prevents interference between the monitor and other electric appliances. 2. Deg[...]

  • Page 9

    - 9 - 15. Image Rotation (Tilt) Circuit. This circuit corrects the tilt of the screen by supplying the image rotation signal to the tilt coil which is attached near the deflection yoke of the CRT. 16. Video Pre-Amp Circuit. This circuit amplifies the analog video signal from 0-0.7V to 0-4V. It is operated by taking the clamp, R, G, B drive and cont[...]

  • Page 10

    - 10 - ADJUSTMENT GENERAL INFORMA TION All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several adjustments may be required. Adjustment should be following procedure and after warming up for a minimum of 30 minutes. • Alignment appliances and tools. - IBM compatible PC. - Programmable Signal G[...]

  • Page 11

    - 11 - 14) Set Brightness and Contrast to Max position. 15) Set SUB-CONTRAST 200(C8) (decimal) position. 16) Set B-DRIVE to 150(96) at DRIVE of the alignment program. 17-1) Adjust R-DRIVE and G-DRIVE command to white balance x=0.283 ± 0.003 and y=0.298 ± 0.003 on the White Balance Meter with PC arrow keys. 17-2) Display color 15,0 window pattern [...]

  • Page 12

    TROUBLESHOOTING GUIDE - 12 - 1. NO POWER NO POWER (POWER INDICATOR OFF ) TROUBLE IN D900 TROUBLE IN FUSE (F901) TROUBLE IN Q901 TROUBLE IN D941, D942, D951, D961, D971 TROUBLE IN Q903, Q952, Q951, Q942, Q941 CHECK FUSE OK? CHECK C908 VOLTAGE? (AC120V: 160VDC, AC220V: 304VDC) NO YES YES YES YES NO NO NO CHECK Q901 PIN 6 WAVEFORM ? CHECK D941, D942, [...]

  • Page 13

    - 13 - 2. NO CHARACTER NO CHARACTER CHECK IC302 PIN 7(5V) ? CHECK IC302 PIN 1, 3, 5? CHECK IC302 PIN 14, 16, 18 ? CHECK IC303 PIN 1, 2, 4 ? CHECK IC303 PIN 7 (105V) PIN 3 (13V) ? TROUBLE IN P302 5V LINE TROUBLE IN PC SIGNAL, P301 SIGNAL CABLE TROUBLE IN IC302 TROUBLE IN P303 12V LINE/ 80V LINE TROUBLE IN IC303 NO YES NO NO YES YES YES YES NO NO CHE[...]

  • Page 14

    - 14 - 3. NO RASTER NO VIDEO (POWER INDICATOR ON ) CHECK POWER INDICATOR GREEN or AMBER? CHECK D712 ANODE (-160V)? CHECK G1 VOLTAGE? (-55V~-15V) TROUBLE IN D712 TROUBLE IN Q799 DPM MODE (NO H and/or V SYNC) AMBER NO GREEN YES NO CHECK CDT HEAT VOLTAGE? (6.3V) TROUBLE IN D941, Q942, Q941 YES NO TROUBLE IN CDT YES[...]

  • Page 15

    - 15 - 4. NO HORIZONT AL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK Q706? CHECK B + VOLTAGE (50V)? CHECK T701(FBT) PIN 2 (31KHZ 60V, 69KHZ 140V) ? CHECK Q705 COLLECTOR WAVEFORM? TROUBLE IN Q706 TROUBLE IN 50V LINE TROUBLE IN Q719, Q703, Q704, D710 TROUBLE IN Q705 TROUBLE IN T701, P701 NO NO YES YES YES YES NO NO 0V T[...]

  • Page 16

    - 16 - 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK IC401 PIN 5, 6, 7 ? CHECK Q711~Q716? CHECK L703? TROUBLE IN IC401 (MICOM) TROUBLE IN Q711 ~ Q716 TROUBLE IN L703 TROUBLE IN C722, C723, C726, C729 NO NO NO YES YES YES Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) 30K ~ 33.9K 34K ~ 38.9K 39K ~ 43.9K 44K ~ 48.9K 49K ~ 51.9K 52K ~ 57.9K 58K ~ 61.[...]

  • Page 17

    - 17 - 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK IC601 PIN 2 (13V+)? CHECK IC701 PIN 23? TROUBLE IN D610 13V LINE TROUBLE IN IC701 TROUBLE IN IC601, V-CIRCUIT NO YES YES NO 3V[...]

  • Page 18

    - 18 - 7. TROUBLE IN OSD TROUBLE IN OSD PERIPHERAL CIRCUIT NO OSD TROUBLE IN 5V LINE TROUBLE IN IC601 PIN1 (V-FBP), T701 40V LINE (H-FBP) TROUBLE IN IC302, IC301 TROUBLE IN IC301, IC302 NO YES DC 5V YES YES YES NO NO NO Pin 5 5V Pin 10 5V H+V 5V H+V CHECK IC301 B + (5V) ? CHECK IC301 PIN 12 WAVEFORM ? (ENTER BUTTON MUST BE PRESSED.) CHECK IC301 PIN[...]

  • Page 19

    - 19 - 8. TROUBLE IN DPM CHECK IC401 (MICOM) PIN 30, 31 (H/V INPUT) SIGNAL? CHECK IC401 PIN 13 WAVEFORM? CHECK IC401 (MICOM) PIN 19, 27 ? CHECK B + LINE (6.3V,13V+, 105V) ? CHECK PC, (PC IS NOT GOING INTO DPM OFF MODE) TROUBLE IN X401 TROUBLE IN IC401 (MICOM) TROUBLE IN Q941, Q942, Q951, Q952, TROUBLE IN PC OFF MODE FAILURE INPUT H/V SYNC SIGNAL H/[...]

  • Page 20

    - 20 - 9. NO DEGAUSSING CHECK IC401 PIN 1 (0V)? CHECK Q953 COLLECTOR VOLTAGE? CHECK P902 ? CHECK RL901? TROUBLE IN IC401 (MICOM) TROUBLE IN Q953 TROUBLE IN P902 TROUBLE IN RL901 TROUBLE IN TH901, DEGAUSSING COIL NO DEGAUSSING DC 15V NO NO NO NO YES YES YES YES (DEGAUSS ON THE OSD MENU MUST BE PRESSED.)[...]

  • Page 21

    - 21 - 10. NO TIL T (NO ROT A TION ) NO TILT (NO ROTATION) TROUBLE IN IC401 ( MI COM) TROUBLE IN 15V LINE, 6.3V LINE TROUBLE IN Q501~Q503 TROUBLE IN P501, TILT COIL NO YES YES YES CHECK 13V LINE AND 6.3V LINE ? CHECK Q503 EMITTER VOLTAGE ? NO NO CHECK IC401 PIN21 WAVE FORM ?[...]

  • Page 22

    EXPLODED VIEW 11 14 12 12 11 10 10-1 10-2 8 B A 7 9 2 5 6 1 a b c MENU SELECT 3 4 13 - 22 -[...]

  • Page 23

    - 23 - EXPLODED VIEW P ARTS LIST Ref. No. 1 2 3 4 5 6 7 8 9 10 10-1 10-2 11 12 13 14 A B a b c Description CABINET ASSEMBLY, CB773F BRAND C048 PC+ABS 85964 WA LOCAL (CB773H-EL) CABINET ASSEMBLY, CB773F BRAND C048 320T 85964 773N WA LOCAL (CB773H-ML) CABINET ASSEMBLY, CB773F NO BRAND C048 320T 85964 WA LOCAL (CB773H-NJ) CABINET ASSEMBLY, CB773F NO B[...]

  • Page 24

    - 24 - DATE: 2002. 12. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C301 0CK1040K945 0.1UF 50V Z F TR C302 0CK1040K945 0.1UF 50V Z F TR C303 0CK1040K945 0.1UF 50V Z F TR C305 181-288C MKT 100V 224JTR PHS 26224 C306 0CE107CF638 100UF SHL,SD 16V M FM5 TP 5 C307 0CK1040K945 0.1UF 50V Z F TR C308 0CK1040K945 0.1UF 50V Z F TR C309 0CK1040K94[...]

  • Page 25

    DATE: 2002. 12. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C904 0CZZTCB003A BULK 7.5 CS E 222M 10.5 250V T C905 0CZZTCB003A BULK 7.5 CS E 222M 10.5 250V T C905 0CZZTCB003A BULK 7.5 CS E 222M 10.5 250V T C906 0CZZTCB003D BULK 7.5 CS E 102M 8.0 250V TD C907 0CZZTCB003C BULK 7.5 CS E 472M 14.5 250V T C908 0CEZTBU002D 180UF 25.4*35 SMH/HC[...]

  • Page 26

    DATE: 2002. 12. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L903 6200J00003A RH3.5*5.0 BOSUNG TP FB303 6210TCE003A BRD3510B BO SUNG 3510MM RADIAL FB304 6210TCE003J BAS2550T BO SUNG 2550MM AXIAL5 FB305 6210TCE003A BRD3510B BO SUNG 3510MM RADIAL FB306 6210TCE003A BRD3510B BO SUNG 3510MM RADIAL FB314 6210TCZ001J BAS3550T0(125-022J) BO SUN[...]

  • Page 27

    DATE: 2002. 12. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R446 0RD1002Q609 10K 1/4W(3 5% TA52 R447 0RD1001Q609 1K 1/4W(3 5% TA52 R448 0RD1801Q609 1.80K 1/4W(3 5% TA52 R490 0RD9100Q609 910 1/4W(3 5% TA52 R491 0RD2200Q609 220 1/4W(3 5% TA52 R492 0RD4300Q609 430 OHM 1/4 W(3.4) 5.00% TA52 R493 0RD7500Q609 750 OHM 1/4 W (3.4) 5% TA52 R494[...]

  • Page 28

    DATE: 2002. 12. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R913 0RD2201Q609 2.20K 1/4W(3 5% TA52 R915 0RD0102Q609 10 1/4W(3 5% TA52 R916 0RD1002Q609 10K 1/4W(3 5% TA52 R918 0RD1001Q609 1K 1/4W(3 5% TA52 R923 0RD1003Q609 100K 1/4W(3 5% TA52 R925 0RB0180K607 0.18OHM 2 W 5% TA62 R926 0RD4301Q609 4.30K 1/4W(3 5% TA52 R927 0RD2002Q609 20K [...]

  • Page 29

    PIN CONFIGURA TION - 29 - STV6888 LOW-COST I 2 C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITORS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 H/HV Syn VSyn HLckVBk HPLL2 C CO HGND RO HPLL1F HPosF HMoirØ HFly RefOut BComp BRegIn BISense HOscF HEHTIn VEHTIn VOscF V A GCCap VGND VCap VOut EWOut XRay HO[...]

  • Page 30

    - 30 - Horizo ntal po sition S-cor rection C- corr ect ion Pin c ushion a symm. Paralle logram Hor. duty c ycle H-moi r Ø am plitud e VDyC or amplit ud e B+ ref. Vertical size Verti cal posit ion Vertical moirØ Pin cush io n Keystone Top cor ner s Bottom corners : Funct ions cont roll ed via I 2 C Bus H size Contro l vo lt a ge level STV6888 Bloc[...]

  • Page 31

    - 31 - STV921 1 Pin Configuration Pin Description[...]

  • Page 32

    - 32 - BLOCK DIAGRAM STV921 1[...]

  • Page 33

    - 33 - STV9556 1 2 3 4 5 6 7 8 9 10 11 OUT1 OUT2 OUT3 GNDP GNDA IN3 V DD GNDS V CC IN2 IN1 BLOCK DIAGRAM Pin Configuration[...]

  • Page 34

    IIC-SDA IIC-SCL DDC-SDA DDC-SCL - 34 - - 35 - SCHEMA TIC DIAGRAM[...]

  • Page 35

    - 36 - - 37 - PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) 2. MAIN BOARD (Solder Side)[...]

  • Page 36

    Dec . 2002 P/NO : 3828TSL091J Printed in Korea[...]