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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
*(
) ID LABEL Model No.
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MENU
SELECT
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
(773N Rev B)
Table of Contents
Related Manuals for LG StudioWorks 773N
Summary of Contents for LG StudioWorks 773N
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Page 1: Color Monitor
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 ) ID LABEL Model No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MENU SELECT Website:http://biz.LGservice.com... -
Page 2: Table Of Contents
SPECIFICATIONS ... 2 SAFETY PRECAUTIONS ... 3 TIMING CHART ... 4 OPERATING INSTRUCTIONS ... 5 WIRING DIAGRAM ... 6 DISASSEMBLY ... 7 BLOCK DIAGRAM ... 8 1. PICTURE TUBE Size : 17 inch DefIection Angle : 90° Neck Diameter : 29.1 mm Dot Pitch : 0.27 mm Face Treatment... -
Page 3: 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. -
Page 4: Timing Chart
VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Sync Total Period Mode Frequency Polarity Sort – 37.50 26.67 – 74.99 13.335 46.88 21.33 75.01 13.331 53.68 18.63 85.07 11.755 68.677 14.561 85.00... -
Page 5: Operating Instructions
OPERATING INSTRUCTIONS FRONT VIEW MENU SELECT See Front Control Panel 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 DPMS (Energy Saving) mode, - stand-by, suspend, or power off mode - its color changes to amber, and if abnormal or damaging circuit turns out amber blink. -
Page 6: Wiring Diagram
WIRING DIAGRAM P402 P501 S + S P702 Socket P902 Signal Cable P302 - 6 - P701 P301... -
Page 7: Block Diagram
BLOCK DIAGRAM Dynamic Focus Static Focus Screen(G2) COIL COIL TILT DEGAUSSING - 7 -... -
Page 8: Description Of Block Diagram
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. - Page 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.
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Page 10: Adjustment
GENERAL INFORMATION 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. - Page 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.
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Page 12: Troubleshooting Guide
TROUBLESHOOTING GUIDE NO POWER (POWER INDICATOR OFF) CHECK FUSE OK? CHECK C908 VOLTAGE? (AC120V: 160VDC, AC220V: 304VDC) CHECK Q901 PIN 6 WAVEFORM CHECK D941, D942, D951, D961, D971 VOLTAGE? TROUBLE IN Q903, Q952, Q951, Q942, Q941 1. NO POWER - 12 - TROUBLE IN FUSE (F901) TROUBLE IN... - Page 13 NO CHARACTER CHECK IC302 PIN 7(5V) ? CHECK IC302 PIN 1, 3, 5? CHECK IC302 PIN 14, 16, 18 ? CHECK IC303 PIN 7 (105V) PIN 3 (13V) ? CHECK IC303 PIN 1, 2, 4 ? CHECK R, G, B CATHODE VOLTAGE? TROUBLE IN CRT SOCKET...
- Page 14 NO VIDEO (POWER INDICATOR ON) CHECK POWER INDICATOR GREEN or AMBER? GREEN CHECK D712 ANODE (-160V)? CHECK G1 VOLTAGE? (-55V~-15V) CHECK CDT HEAT VOLTAGE? (6.3V) TROUBLE IN 3. NO RASTER AMBER - 14 - DPM MODE (NO H and/or V SYNC) TROUBLE IN D712 TROUBLE IN...
- Page 15 4. NO HORIZONTAL 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 T701, P701 TROUBLE IN Q706 TROUBLE IN 50V LINE TROUBLE IN Q719, Q703, Q704, D710 TROUBLE IN...
- Page 16 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK IC401 PIN 5, 6, 7 ? CHECK Q711~Q716? CHECK L703? TROUBLE IN C722, C723, C726, C729 TROUBLE IN IC401 (MICOM) TROUBLE IN Q711 ~ Q716 TROUBLE IN L703 Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) 30K ~ 33.9K 34K ~ 38.9K...
- Page 17 NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK IC601 PIN 2 (13V+)? CHECK IC701 PIN 23? TROUBLE IN IC601, V-CIRCUIT 6. NO VERTICAL DEFLECTION - 17 - TROUBLE IN D610 13V LINE TROUBLE IN IC701...
- Page 18 (ENTER BUTTON MUST BE PRESSED.) NO OSD CHECK IC301 B + (5V) ? DC 5V CHECK IC301 PIN 5, 10 WAVEFORM? Pin 10 Pin 5 CHECK IC301 PIN 12 WAVEFORM ? CHECK IC301 PIN 13, 14, 15 ? TROUBLE IN OSD PERIPHERAL CIRCUIT 7.
- Page 19 (NO OFF MODE.) OFF MODE FAILURE CHECK IC401 (MICOM) PIN 30, 31 (H/V INPUT) SIGNAL? H/V SYNC CHECK IC401 PIN 13 WAVEFORM? 24MHz CHECK IC401 (MICOM) PIN 19, 27 ? SEE DPM TABLE CHECK B + LINE (6.3V,13V+, 105V) ? TROUBLE IN PC 8.
- Page 20 NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) CHECK IC401 PIN 1 (0V)? CHECK Q953 COLLECTOR VOLTAGE? DC 15V CHECK P902 ? CHECK RL901? TROUBLE IN TH901, DEGAUSSING COIL 9. NO DEGAUSSING - 20 - TROUBLE IN IC401 (MICOM) TROUBLE IN Q953 TROUBLE IN...
- Page 21 10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK IC401 PIN21 WAVE FORM ? CHECK 13V LINE AND 6.3V LINE ? CHECK Q503 EMITTER VOLTAGE ? TROUBLE IN P501, TILT COIL TROUBLE IN IC401 ( MI COM) TROUBLE IN 15V LINE, 6.3V LINE TROUBLE IN Q501~Q503...
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Page 23: Exploded View
Part No. Ref. No. 3091TKC048M CABINET ASSEMBLY, CB773F BRAND C048 PC+ABS 85964 WA LOCAL (CB773H-EL) CABINET ASSEMBLY, CB773F BRAND C048 320T 85964 773N WA LOCAL (CB773H-ML) 3091TKC048N 3091TKC048Q CABINET ASSEMBLY, CB773F NO BRAND C048 320T 85964 WA LOCAL (CB773H-NJ) 3091TKC048P... -
Page 24: Replacement Parts List
CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CAPACITORS C301 0CK1040K945 0.1UF 50V Z F TR C302 0CK1040K945 0.1UF 50V Z F TR C303... - Page 25 *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...
- Page 26 *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 SUNG RH...
- Page 27 *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...
- Page 28 *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...
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Page 29: Pin Configuration
PIN CONFIGURATION LOW-COST I 2 C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITORS STV6888 - 29 -... - Page 30 STV6888 Block Diagram - 30 -...
- Page 31 STV9211 Pin Configuration Pin Description - 31 -...
- Page 32 BLOCK DIAGRAM STV9211 - 32 -...
- Page 33 Pin Configuration BLOCK DIAGRAM STV9556 OUT1 OUT2 OUT3 GNDP GNDS GNDA - 33 -...
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Page 34: Schematic Diagram
DDC-SDA IIC-SDA DDC-SCL IIC-SCL - 34 - SCHEMATIC DIAGRAM - 35 -... -
Page 35: Printed Circuit Board
PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) 2. MAIN BOARD (Solder Side) - 36 - - 37 -... - Page 36 Dec. 2002 P/NO : 3828TSL091J Printed in Korea...