Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-119 FACTORY MODEL: CB773H MODEL: StudioWorks 773N (CB773H-ML), StudioWorks 773E (CB773H-EL), (CB773H-NJ), (CB773H-EJ), TINY773N (773N Rev B) *( ) ID LABEL Model No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS DESCRIPTION OF BLOCK DIAGRAM................... ..9 ADJUSTMENT ...................................................... 10 TROUBLESHOOTING GUIDE .............................. 12 EXPLODED VIEW................................................... 22 REPLACEMENT PARTS LIST ............................... 24 PIN CONFIGURATION........................................... 29 SCHEMATIC DIAGRAM ......................................... 34 PRINTED CIRCUIT BOARD...................................
SAFETY PRECAUTIONS 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 other hazards.
TIMING CHART VIDEO C B SYNC D E F A << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Mode 1 2 3 4 H/V Sort Sync Polarity H – Blanking Time Sync Duration (E) (C) Front Porch (D) Total Period (A) Video Active Time (B) 37.50 26.67 20.32 6.35 2.03 3.81 0.51 Frequency Back Porch (F) 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.
OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW ID Label MENU See Front Control Panel SELECT Power ON/OFF Button AC Power Socket Signal Connector Front Control Panel SELECT MENU 5 4 3 2 1 4. SET Button 1. Power ON/OFF Button Use these buttons to choose or adjust items in the on screen display. Use this button to turn the monitor ON or OFF. 2.
WIRING DIAGRAM P402 P501 P701 FBT S+ S P702 AC Socket T1 P902 Signal Cable P302 P301 G2 -6-
-7- POWER INPUT 100~240VAC (50/60Hz) SMPS CONTROL (IC901) 13V 13V -10V I2C 6.3V 13V 105V 50V I2C 12V 5V 50V H-Linearity Correction H-OUT ( Q706) 400V Dynamic Focus Circuit FBT ( T701 ) - 160V Vertical Blanking, Brightness Control 40V B+ Heater ( 6.
DESCRIPTION OF BLOCK DIAGRAM 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. Degauss Circuit & Coil. The degauss circuit consists of the degaussing coil, the PTC(Positive Temperature Coefficient) thermistor(TH901), and the relay(RL901).
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. 17. Video Output Amp Circuit. This circuit amplifies the video signal which comes from the video pre-amp circuit and amplified it to applied the CRT cathode. 16. Video Pre-Amp Circuit. This circuit amplifies the analog video signal from 0-0.7V to 0-4V.
ADJUSTMENT GENERAL INFORMATION 7) Adjust tilt as arrow keys to be the best condition. 8) DIST. ADJ. → BALANCE command. 9) Adjust parallelogram as arrow keys to be the best condition. 10) Adjust balance of pin-balance as arrow keys to be the best condition. 11) DIST. ADJ. → FOS. ADJ command. 12) Adjust V-SIZE as arrow keys to 230±2mm. 13) Adjust V-POSITION as arrow keys to center of the screen. 14) Adjust H-SIZE as arrow keys to 310±2mm. 15) Adjust H-POSITION as arrow keys to center of the screen.
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 (70x70mm) at mode 4. 18) Adjust SUB-CONTRAST command to 50±2FL . 19) After push the “ENTER” key. 20) Display color 15,0 full white patten at Mode 4.. 21) COLOR ADJ.
TROUBLESHOOTING GUIDE 1.
2.
3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK POWER INDICATOR GREEN or AMBER? AMBER DPM MODE (NO H and/or V SYNC) GREEN CHECK D712 ANODE (-160V)? NO TROUBLE IN D712 NO TROUBLE IN Q799 NO TROUBLE IN D941, Q942, Q941 YES CHECK G1 VOLTAGE? (-55V~-15V) YES CHECK CDT HEAT VOLTAGE? (6.
4.
5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK IC401 PIN 5, 6, 7 ? NO TROUBLE IN IC401 (MICOM) NO TROUBLE IN Q711 ~ Q716 NO TROUBLE IN L703 YES CHECK Q711~Q716? YES CHECK L703? Cs SIGNAL TABLE YES HORIZONTAL FREQUENCY(fH) 30K 34K 39K 44K 49K 52K 58K 62K 66K TROUBLE IN C722, C723, C726, C729 - 16 - ~ ~ ~ ~ ~ ~ ~ ~ ~ 33.9K 38.9K 43.9K 48.9K 51.9K 57.9K 61.9K 65.
6.
7. TROUBLE IN OSD NO OSD (ENTER BUTTON MUST BE PRESSED.
8. TROUBLE IN DPM OFF MODE FAILURE CHECK IC401 (MICOM) PIN 30, 31 (H/V INPUT) SIGNAL? YES (NO OFF MODE.) NO CHECK PC, (PC IS NOT GOING INTO DPM OFF MODE) INPUT H/V SYNC SIGNAL H/V SYNC CHECK IC401 PIN 13 WAVEFORM? TROUBLE IN X401 NO 5V YES 24MHz CHECK IC401 (MICOM) PIN 19, 27 ? NO (DPMF: 0V) TROUBLE IN IC401 (MICOM) SEE DPM TABLE YES CHECK B+ LINE (6.
9. NO DEGAUSSING NO DEGAUSSING CHECK IC401 PIN 1 (0V)? (DEGAUSS ON THE OSD MENU MUST BE PRESSED.
10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK IC401 PIN21 WAVE FORM ? NO TROUBLE IN IC401 (MICOM) YES CHECK 13V LINE AND 6.3V LINE ? NO TROUBLE IN 15V LINE, 6.
- 22 - 1 2 M EN U T EC SE L 5 A 10-2 6 11 12 c 10 13 b 7 B 8 10-1 12 a 11 EXPLODED VIEW 9 4 3 14
EXPLODED VIEW PARTS LIST Ref. No. Description Part No.
REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE : S SAFETY Mark AL ALTERNATIVE PARTS *S *AL LOC. NO. PART NO. DATE: 2002. 12. 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DATE: 2002. 12. 10.
*S *AL LOC. NO. C904 C905 C905 C906 C907 C908 C909 C910 C911 C913 C914 C915 C917 C918 C941 C942 C943 C944 C946 C951 C952 C953 C954 C971 C999 PART NO. DATE: 2002. 12. 10. DESCRIPTION / SPECIFICATION 0CZZTCB003A 0CZZTCB003A 0CZZTCB003A 0CZZTCB003D 0CZZTCB003C 0CEZTBU002D 0CK10301510 0CK27101515 0CE475CK638 0CE476CK638 0CZZTFT001P 0CK6810K515 0CK1020K515 0CN1040K949 0CE108CD618 0CE107CF638 0CK56101515 0CZZTCB003C 0CK1010W515 0CE108CF630 0CE227CF638 0CE107CF638 0CE108CF630 0CE476CN618 0CE227CL630 BULK 7.
*S *AL LOC. NO. L903 FB303 FB304 FB305 FB306 FB314 FB315 FB316 FB401 FB402 FB403 FB501 FB502 FB701 FB703 FB705 FB903 FB904 FB905 FB921 FB922 FB951 FB952 PART NO. 6200J00003A 6210TCE003A 6210TCE003J 6210TCE003A 6210TCE003A 6210TCZ001J 6210TCZ001J 6210TCZ001J 971-0016 6210TCE003L 6210TCE003J 6210TCE003P 6210TCE003J 6210TCE003L 6210TCE003B 971-0016 6210TCE003P 6210TCE003K 6210TCE003P 6210TCE003A 6210TCE003L 971-0016 6210TCE003G DATE: 2002. 12. 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. RH3.5*5.
*S *AL LOC. NO. R446 R447 R448 R490 R491 R492 R493 R494 R495 R501 R508 R515 R597 R598 R599 R602 R604 R607 R608 R609 R611 R612 R614 R615 R619 R700 R701 R702 R703 R704 R705 R706 R707 R708 R709 R710 R711 R712 R713 R714 R716 R717 R718 R719 R720 R721 R722 R723 R724 R726 R727-1 R728 R729 R731 R732 R733 R735 R736 R737 R738 R739 R740 PART NO.
*S *AL LOC. NO. R913 R915 R916 R918 R923 R925 R926 R927 R928 R929 R941 R944 R945 R951 R952 R953 R954 R955 R956 R957 R960 PART NO. DATE: 2002. 12. 10. DESCRIPTION / SPECIFICATION 0RD2201Q609 0RD0102Q609 0RD1002Q609 0RD1001Q609 0RD1003Q609 0RB0180K607 0RD4301Q609 0RD2002Q609 0RD1800Q609 0RD0332Q609 0RN0220H609 0RD4700A609 0RD4701Q609 0RN0221H609 0RD1202A609 0RD1001A609 0RD4701Q609 0RD4701Q609 0RD6802A609 0RD0472Q609 0RD6200A609 2.
H/HVSyn VSyn HLckVBk HOscF HPLL2C CO HGND RO HPLL1F HPosF HMoirØ HFly RefOut BComp BRegIn BISense 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VDyCor SDA SCL Vcc BOut GND HOut XRay EWOut VOut VCap VGND VAGCCap VOscF VEHTIn HEHTIn PIN CONFIGURATION LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITORS - 29 - STV6888
: - 30 S-correction C-correction VDyCor amplitude Vertical size Vertical position Vertical moirØ H-moirØ amplitude Control voltage level Functions controlled via I2C Bus Horizontal position Pin cushion asymm. Parallelogram Hor. duty cycle H size Pin cushion Keystone Top corners Bottom corners B+ ref.
STV9211 Pin Configuration Pin Description - 31 -
BLOCK DIAGRAM STV9211 - 32 -
STV9556 Pin Configuration 11 10 9 8 7 6 5 4 3 2 1 BLOCK DIAGRAM - 33 - OUT1 OUT2 OUT3 GNDP VDD GNDS GNDA IN3 VCC IN2 IN1
SCHEMATIC DIAGRAM DDC-SDA DDC-SCL IIC-SDA IIC-SCL - 34 - - 35 -
PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) - 36 - 2.
P/NO : 3828TSL091J Dec.
