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SPECIFICATIONS
1. PICTURE TUBE
Size
Gun
DefIection Angle
Neck Diameter
Phosphor
Transmission
Dot Pitch
Low Radiation
2. SIGNAL
2-1. HORIZONTAL & VERTICAL SYNC
1) Input Voltage Level : Low=0~0.8V, High=2.1~5.5V
2) Sync Polarity
2-2. VIDEO INPUT SIGNAL
1) Voltage Level
a) Color 0, 0
b) Color 7, 0
c) Color 15, 0
2) Input Impedance
3) Video Color
4) Signal Format
2-3. SIGNAL CONNECTOR
15 Pin D-Sub Connector
2-4. SCANNING FREQUENCY
Horizontal
Vertical
3. POWER SUPPLY
3-1. POWER RATING
AC 90 ~ 264V (Free Voltage), 50/60Hz, 1.5A Max.
: 17 inch
: In-line
: 90¡
: 29.1 mm
: P22
: 52%
: 0.28 mm
: MPR-II, TCO-92
: Positive or Negative
: 0 ~ 0.7 Vp-p
: 0 Vp-p
: 0.467 Vp-p
: 0.7 Vp-p
: 75 ohm
: R, G, B Analog
: Refer To Timing Chart
: 30 ~ 65 kHz
: 50 ~ 110 Hz
StudioWorks 76i
: Comply with the MPR-II Requirement.
StudioWorks 76T : Comply with the TCO-92 Requirement.
76W
: No Brand Model (MPR-II)
3-2. POWER CONSUMPTION
MODE
H/V SYNC
NORMAL (ON)
ON/ON
STAND-BY
OFF/ON
SUSPEND
ON/OFF
OFF
OFF/OFF
4.DISPLAY AREA
4-1. Active Video Area
4-2. Display Color
4-3. Display Resolution
4-4. Video Bandwidth
5. ENVIRONMENT
5-1. Operating Temperature: 10 ~ 35¡C
5-2. Relative Humidity
5-3. Altitude
6. DIMENSIONS (WITH TILT/SWIVEL)
Width
Depth
Height
7. WEIGHT (WITH TILT/SWIVEL)
Net. Weight
Gross Weight
- 2 -
POWER CONSUMPTION
LED COLOR
less than 110 W
GREEN
less than 15 W
GREEN/ORANGE
BLINKING
less than 15 W
less than 5 W
ORANGE
: 300 mm X 225 mm
(Available for Full Screen)
: Full Colors
: 1280 Dots X 1024 Lines
(Non-Interlace)
: 100 MHz
(Ambient)
: 8 ~ 80%
(Non-Condensing)
: 10,000 ft
: 412.0 mm
: 431.0 mm
: 428.5 mm
: 17.0 kg
: 20.5 kg

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Summary of Contents for LG CS770

  • Page 1 SPECIFICATIONS 3-2. POWER CONSUMPTION 1. PICTURE TUBE Size : 17 inch MODE H/V SYNC POWER CONSUMPTION LED COLOR : In-line DefIection Angle : 90¡ less than 110 W NORMAL (ON) ON/ON GREEN Neck Diameter : 29.1 mm STAND-BY OFF/ON less than 15 W GREEN/ORANGE Phosphor : P22...
  • Page 2: Safety Precautions

    X-radiation. permission from LG Electronics Inc. or you will void the original parts and labor guarantee. Note : It is important to use an accurate high voltage meter calibrated periodically.
  • Page 3: Timing Chart

    TIMING CHART VIDEO SYNC MODE MARK MODE 1 MODE 2 MODE 3 MODE 4 MODE5 MODE 6 MODE7 Sync Polarity 31.467 31.467 37.500 46.875 56.476 60.023 63.981 Frequency 31.778 31.778 26.667 21.333 17.707 16.660 15.630 Total Period µs 25.422 25.422 20.317 16.162 13.653...
  • Page 4: Front View

    OPERATING INSTRUCTIONS REAR VIEW FRONT VIEW ID Label OSD ON/OFF Power ON/OFF Switch Enter button Power (DPMS) Indicator AC Power Socket D-Sub Signal Connector OSD Select/Adjustment Control Contrast Adjustment Control Brightness Adjustment Control Front Control Panel All functions are adjusted from the microprocessor based digital controls. Power Indicator OSD ON/OFF Enter Button Power Button...
  • Page 5 The bar graph shows you the current level of the selected ENTER BUTTON H-POSITION control. Use the Adjustment Control knob to Use this button to start/enter and exit from the On Screen increase or decrease the level to fit the screen or your Display (OSD).
  • Page 6: Control Locations

    CONTROL LOCATIONS VR201 SW205 SW204 SW203 SW202 SW206 SW201 CONTROL H/ SINK VR901 VR702 MAIN VR501 VR701 SW701 VR302 VR301 VIDEO Ref. No. Control Function Ref. No. Control Function B + ADJUSTMENT SW206 VR901 POWER SWITCH SW205 VR702 H-LIN. ADJUSTMENT CONTRAST INCREASE SW204 VR701...
  • Page 7: Wiring Diagram

    WIRING DIAGRAM P201 P202 P203 P403 P404 P401 P601 P701 P402 P901 P501 SW701 AC Socket Signal Cable P304 P303 P302 P305 P301 - 8 -...
  • Page 8 WIRING DIAGRAM (TCO-92) P201 P202 P203 P403 P404 P401 P601 P701 P402 P901 P501 SW701 P702 AC Socket Signal Cable P304 P303 P302 P305 P301 - 9 -...
  • Page 9 DISASSEMBLY 1. TILT/SWIVEL REMOVAL Set the monitor face down. Pressing the latch , carefully remove the Tilt/Swivel by pulling it upward. 4. CRT BOARD ASSEMBLY REMOVAL Remove three pins Remove CRT ground connector 2. BACK COVER REMOVAL Carefully separate the CRT Board Assembly from Remove four screws from the Back Cover.
  • Page 10 5. BOTTOM BRACKET REMOVAL 6. MAIN BOARD ASSEMBLY REMOVAL Remove five screws Remove five screws Remove the Bottom Bracket. Remove three screws Release four latches from the Main Board Assembly. Bottom Bracket - 11 -...
  • Page 12: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 6. Micom (Microprocessor) Circuit. This is used for suppressing noise of the power input line The operating procedure of the Micom (Microprocessor) flowing into the monitor and/or some noise generated in and its associated circuit is as follows: this monitor flowing out through the power input line.
  • Page 13 14. H-Raster Centering Circuit. 19. OSD Circuit. This circuit makes that the back raster stay in center of the This circuit is used for performing the OSD (On Screen screen by adjusting the SW701. Display) function. When a user selects the Enter button and OSD 15.
  • Page 14 ADJUSTMENT GENERAL INFORMATION All adjustments are thoroughly checked and corrected when 3. Adjustment for the Horizontal Raster Center the monitor leaves the factory. Therefore, the monitor Display cross hatch pattern at Mode 7. should operate normally and produce proper color and Adjust the raster should be center of the screen with pictures upon installation.
  • Page 15 6.Adjustment for the Focus. Adjust SUB-CONTRAST 2 to 55 1FL of the box Set the Brightness and Contrast to max position. pattern luminance. Display H character in full screen at Mode 7. Display color 15,0 full white patten at Mode 7. Adjust Focus control on the FBT that focus should Adjust ABL to 30 1FL of the luminance.
  • Page 16: Troubleshooting Guide

    TROUBLE-SHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE FUSE OK? (F901) CHECK C907 VOLTAGE? TROUBLE IN (AC120V : 170VDC, D901 AC220V : 310VDC) CHECK TROUBLE IN IC901 PIN 1 WAVEFORM IC901, IC902 (SQUARE WAVE COMES Q901 or Q902 OUT?) CHECK...
  • Page 17 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC301 PIN 1 3, 5, P303, 8, 10, 12, 12V LINE 9, 17 (8V)? TROUBLE IN CHECK PC SIGNAL, IC301 PIN 2, 4, 6 ? P302, SIGNAL CABLE CHECK TROUBLE IN IC301 PIN 15, 19, 22 ? IC301 CHECK TROUBLE IN...
  • Page 18 3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK ORANGE OR BLINKING POWER INDICATOR NO DPM MODE GREEN or ORANGE (NO H and/or V Sync) BLINKING? GREEN CHECK D713 CATHODE TROUBLE IN VOLTAGE ? Q712 (41V) CHECK TROUBLE IN G1 VOLTAGE? Q501, Q502 ( 10 20V) TROUBLE IN...
  • Page 19 4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK TROUBLE IN Q708 Q708, D705 CHECK TROUBLE IN B + VOLTAGE 175V LINE (175V)? CHECK TROUBLE IN Q510 EMITTER Q509, Q510 WAVE FORM? CHECK TROUBLE IN T702 PIN 4 Q511 B + VOLTAGE? TROUBLE IN L502, T702, P701...
  • Page 20 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 PIN 7, 8, 9? IC401 (MICOM) CHECK TROUBLE IN Q716, Q717, Q718, Q719, Q716~Q721 Q720, Q721? CHECK TROUBLE IN Q722 EMITTER IC703, Q722, R762 VOLTAGE? TROUBLE IN L703, D717 Cs SIGNAL TABLE HORIZONTAL Cs 0...
  • Page 21: No Vertical Deflection

    6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 3 R608, 15V LINE (15V)? CHECK TROUBLE IN IC601 PIN 7 HIGH VOLTAGE OUT (40V)? CIRCUIT, D713 CHECK TROUBLE IN IC701 PIN 12, 13? IC701 TROUBLE IN IC601, V-CIRCUIT - 22 -...
  • Page 22 7. NO CONTRAST NO CONTRAST TROUBLE IN CHECK IC402, Q403, Q403 COLLECTOR WAVEFORM ? ABL-OUT VOLTAGE (11V AT BLACK PATTERN) CHECK TROUBLE IN ABL-OUT Q713, Q714, Q715 VOLTAGE? CHECK TROUBLE IN IC301 PIN 13? IC301 DC 0.8~3.5V TROUBLE IN CONTRAST LINE - 23 -...
  • Page 23 8. TROUBLE IN OSD (SELECT BUTTONS MUST BE PRESSED.) NO OSD CHECK TROUBLE IN IC402 B + ? 5V LINE DC 5V CHECK TROUBLE IN IC402 PIN 4, 5 IC601 PIN 8 (V-BLK) WAVEFORM? T702, H-FBP LINE Pin 4 Pin 5 CHECK TROUBLE IN IC402 PIN 3...
  • Page 24 9. TROUBLE IN DPM (NO OFF MODE.) OFF MODE FAILURE CHECK CHECK PC, IC401 (MICOM) INPUT H / V SYNC SIGNAL (PC IS NOT GOING INTO PIN 35, 28 (H / V INPUT) DPM OFF MODE) SIGNAL? NO H / V SYNC CHECK TROUBLE IN IC402 PIN 9...
  • Page 25 10. NO DEGAUSSING BUTTON MUST BE PRESSED.) NO DEGAUSSING CHECK TROUBLE IN IC401 PIN 14 IC401 (MICOM) (5V)? CHECK TROUBLE IN Q912 COLLECTOR Q912, Q913 VOLTAGE? DC 0.2V CHECK TROUBLE IN P901? P901 CHECK TROUBLE IN RL901? RL901 TROUBLE IN TH902, DEGAUSSING COIL - 26 -...
  • Page 26 11. NO TILT (ROTATION ) NO TILT (ROTATION) CHECK TROUBLE IN IC502 PIN 1 IC401 (MICOM) VOLTAGE ? CHECK TROUBLE IN IC502 B + (6.3V) 6.3V LINE, B - ( 10V)? D712 CATHODE VOLTAGE CHECK TROUBLE IN IC502 PIN 4 IC502 VOLTAGE ? TROUBLE IN...
  • Page 27: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side)
  • Page 28 2. MAIN BOARD (Solder Side)
  • Page 29 3. VIDEO BOARD (Component Side) 4. VIDEO BOARD (Solder Side) - 30 -...
  • Page 30 5. CONTROL BOARD (Component Side) 6. CONTROL BOARD (Solder Side) - 31 -...
  • Page 31: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Ref. No. Part No. Q'ty Material Description 300-D19A CABINET ASS'Y, FOR StudioWorks 76i (MPR-II) LGC ABS 345 UL94-5V 300-D19U CABINET ASS'Y, FOR NO BRAND (76W) 3091TKC007G CABINET ASS'Y, FOR StudioWorks 76T (TCO-92) 112-882A M41KVZ680 72(Q)(NORTHERN HEMISPHERE) 2423GC0B81A M41LFQ803 01N (NORTHERN HEMISPHERE)
  • Page 32 EXPLODED VIEW PARTS LIST Description Ref. No. Part No. Q'ty Material 4810TKK009A BRACKET, REAR 340-713A BRACKET, MAIN LGC ABS 303S UL94-V0 KNOB, BRIGHT & CONTRAST 440-957A LGC ABS 303S UL94-V0 KNOB, MICOM CONTROL 440-958A LGC ABS 303S UL94-V0 6871TST003E PCB ASS'Y, CONTROL FOR USA/CAN 6871TST003C PCB ASS'Y, CONTROL FOR EUROPE/AUS/JAPAN PCB ASS'Y, CONTROL FOR MEXICO...

This manual is also suitable for:

Cs780

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