Related Manuals for LG VX930
Summary of Contents for LG VX930
-
Page 1: Color Monitor
COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-111 FACTORY MODEL: EG994G MODEL: VX930 CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. VX930 MENU SELECT... -
Page 2: Table Of Contents
CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............11 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......13 TIMING CHART ............4 EXPLODED VIEW........... 20 OPERATING INSTRUCTIONS ........ 5 REPLACEMENT PARTS LIST ....... 22 CONTROL LOCATIONS ......... 6 PIN CONFIGURATION........... 28 WIRING DIAGRAM ..........7 SCHEMATIC DIAGRAM ..........29 BLOCK DIAGRAM ........... -
Page 3: Safety Precautions
SAFETY PRECAUTIONS SAFETY-RELATED COMPONENT WARNING! X-RADIATION There are special components used in this color monitor The only potential source of X-radiation is the picture tube. which are important for safety. These parts are marked However, when the high voltage circuitry is operating on the schematic diagram and the replacement properly there is no possibility of an X-radiation problem. -
Page 4: Timing Chart
TIMING CHART VIDEO SYNC FACTORY PRESET MODE MODE MARK MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7 MODE 8 MODE 9 Sync Polarity — — — — Frequency 60.023 37.879 46.875 31.469 48.363 37.500 31.469 79.976 93.750... -
Page 5: Operating Instructions
FRONT VIEW REAR VIEW ID Label VX930 MENU SELECT Power ON/OFF Button AC Power Socket See Front Control Panel Signal Connector Front Control Panel Power (DPMS) Indicator MENU Button SELECT Button VX930 MENU SELECT Power Button Buttons Buttons 1. Power ON/OFF Button Use these buttons to choose or adjust items in the on Use this button to turn the monitor ON or OFF. -
Page 6: Control Locations
VR801 : High Voltage Adjustment (27kV) VR901: B Adjustment (190V Line) -
Page 7: Wiring Diagram
WIRING DIAGRAM P201 P402 P401 P801 P451 P702 P902 Socket Signal Cable P302 P301 - 7 -... -
Page 8: Block Diagram
[ OS D Con trol ] Heater ( 6. 3V ) Signal H-Sync Signal Cable BRIGHTNESS/CO NTRAS T V-Sync Signal VIDEO VIDEO H / V POSITION Pre-A mp Main Amp C DATA (SDA) H / V SIZE (LM1267) (LM2463) ROTA TION C CLOCK(SCL) SPCC G2 G1... -
Page 9: Description Of Block Diagram
DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 5. X-ray Protection. This is used for suppressing noise of power input line This circuit detects the rectified DC voltage comes flowing into the monitor and/or some noise generated from the FBT pin 4. If the high voltage of the FBT in this monitor flowing out through the power input line. - Page 10 11. D/D Drive & Convert Circuit. 19. Image Rotation (Tilt) Circuit. This circuit is used for supplying B + voltage to This circuit corrects the tilt of the screen by supplying horizontal deflection output transistor (Q801). This the image rotation signal to the tilt coil which is circuit makes to add side-pincushion correcting signal attached to the CDT near the deflection.
-
Page 11: Adjustment
ADJUSTMENT GENERAL INFORMATION 6) Adjust H-POSITION as arrow keys to center of the All adjustment are thoroughly checked and corrected screen. when the monitor leaves the factory, but sometimes 7) Adjust H-SIZE as arrow keys to 350 ± 2mm. several adjustments may be required. 8) Adjust V-POSITION as arrow keys to center of the Adjustment should be following procedure and after screen. - Page 12 15) Display color 15,0 box patten(70x70mm) at Mode 8. 6. Adjustment for Focus. 16) Adjust SUB-CONTRAST command to 48±1FL of the 1) Display H character in full screen at Mode 8. raster luminance. 2) Adjust two Focus control on the FBT that focus 17) Display color 15,0 full white patten at Mode 8.
-
Page 13: Troubleshooting Guide
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE OK? FUSE (F901) CHECK TROUBLE IN D901 BRIDGE DIODE BRIDGE DIODE? (D901) CHECK C907(+) VOLTAGE TROUBLE IN 145VDC at 110V input IC901 310VDC at 220V input CHECK TROUBLE IN D912, D911, Q902,... - Page 14 2. NO CHARACTER NO CHARACTER TROUBLE IN CHECK P301, SIGNAL CABLE, IC302 PIN 5, 6, 7 ? PC SIGNAL CHECK TROUBLE IN IC302 PIN 18, 19, 20, IC302, P302 PIN 6 (5V) ? CHECK IC303 PIN 1, 3, 5 TROUBLE IN PIN10 (12V), IC303 PIN 6 (80V) ?
- Page 15 3. NO RASTER NO VIDEO (POWER INDICATOR GREEN or AMBER) CHECK AMBER POWER INDICATOR TROUBLE IN GREEN or AMBER ? P302 SIGNAL CABLE GREEN CHECK ROTATE SCREEN MIN. SCREEN CONTROL CONTROL KNOB KNOB OF FBT CHECK VOLTAGE AT D926 CATHODE (190V) TROUBLE IN PRIMARY D923 CATHODE (80V) D922 CATHODE (15V)
- Page 16 4. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 Pin 3 15V LINE (15V) ? CHECK TROUBLE IN IC601 PIN 7 T701 PIN 4, D704 (47V)? CHECK TROUBLE IN IC801 IC801 PIN 12, 13 TROUBLE IN IC601, V-CIRCUIT - 16 -...
- Page 17 5. TROUBLE IN DPM STAND-BY/SUSPEND/ OFF MODE FAILURE CHECK CHECK PC, IC401 (MICOM) NO H / V SYNC SIGNAL (PC IS NOT GOING INTO PIN 40, 41 (H/V INPUT) DPM MODE) SIGNAL? INPUT H/V SYNC CHECK TROUBLE IN IC401 PIN 9, 8 X401, IC401 WAVEFORM? CHECK...
- Page 18 6. NO DEGAUSSING NO DEGAUSSING CHECK TROUBLE IN IC401 PIN 6 IC401 (MICOM) (5V)? CHECK TROUBLE IN Q920 COLLECTOR Q920 VOLTAGE (15V)? CHECK TROUBLE IN P901? P901 CHECK TROUBLE IN RL901? RL901 TROUBLE IN TH901, DEGAUSSING COIL - 18 -...
- Page 19 7. TROUBLE IN OSD NO OSD CHECK TROUBLE IN IC301 PIN 4 P302 (5V) ? CHECK IC301 PIN 5 TROUBLE IN (NEGATIVE H-PULSE P302 COMES IN ?) CHECK TROUBLE IN IC301 PIN 18 P302 (V-PULSE COMES IN?) CHECK IC301 PIN 13, 14, 15 TROUBLE IN (IS THERE ANY SIGNAL IC301, IC401...
-
Page 20: Exploded View
EXPLODED VIEW 20-2 20-1... - Page 21 Part No. Description Ref. No. 3091TKC080A CABINET ASSEMBLY, EG994G G/WAY TKC073 320T (ER31)SPRAY 6318L19001B CDT(CIRC), M46QEF903X 03N6LD LG-PHILIPS 95KHZ 29.1MM FLAT 3809TKC030D BACK COVER ASSEMBLY, EG994G TKC033 320T 8C793 3043TKK067D TILT SWIVEL ASSEMBLY, EG994G B042/T048 8C793, HF350U 339-002K SCREW ASSEMBLY, TAPTITE P TYPE D5.0 L25.0 MSWR/FZMY .
-
Page 22: Replacement Parts List
REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2002. 04. 15. DATE: 2002. 04. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. - Page 23 DATE: 2002. 04. 15. DATE: 2002. 04. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION DIODEs C819 181-477U 333J 19.5*13.0*7.5*7.5 250V J PU TP7.5 C821 0CK1040K945 0.1UF 50V Z F TR D201 0DL305029BA LTL-305DJ-0C2 TP LITEON...
- Page 24 DATE: 2002. 04. 15. DATE: 2002. 04. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D901 0DD360000DB D3SB60 SHINDENKEN FB305 125-155A BFD3510R2FG SAMWHA 3.5*10MM D902 0DD400709CB UF4007 TP G.I DO204AL 1000V FB306 125-022J FERRITE KQ-1 JS 3.5*5.0MM AXIAL...
- Page 25 DATE: 2002. 04. 15. DATE: 2002. 04. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION Q833 0TF306000AA 2SJ306 BK SANYO -250V -3A TO220ML R334 0RD1000Q609 100 1/4W(3 5% TA52 Q834 0TR231609AA KSC2316-Y TP SAMSUNG TO92L...
- Page 26 DATE: 2002. 04. 15. DATE: 2002. 04. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R701 0RMZTWD001C 47 OHM 7 W 5% RWR PD-TYPE R831 0RN1002F409 10K 1/6W 1 TA52 R702 0RD1002Q609 10K 1/4W(3 5% TA52...
- Page 27 DATE: 2002. 04. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R953 0RD1002Q609 10K 1/4W(3 5% TA52 R954 0RD4700A609 470 OHM 1/2 W (7.0) 5% TA52 R955-1 0RD4701Q609 4.70K 1/4W(3 5% TA52 R984 0RX3902J609 39K OHM 1 W 5% TA52 R990 0RD0512Q609 51 1/4W(3 5% TA52...
-
Page 28: Pin Configuration
PIN CONFIGURATION TDA4866J Current Driven Vertical Deflection Booster SYMBOL OUTB TDA4866J OUTB OUTA V FB GUARD OUTA FEEDB GUARD FEEDB Pin Configuration M24C08 Serial I C BUS EEPROM SYMBOL DESCRIPTION PSDIP8 (BN) 0.25mm Frame E0-E2 Chip Enable Input Serial Data Address Input/Output Serial Clock Write Control SO8 (MN) - Page 30 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side)