LG StudioWorks 700S Service Manual

Color monitor

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Service manual (38 pages)

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CA-131

MODEL: StudioWorks 700S

StudioWorks 700B

StudioWorks 700E

(

) **Same model for Service

CAUTION

BEFORE SERVICING THE UNIT,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

SELECT

Website:http://biz.LGservice.com

E-mail:http://www.LGEservice.com/techsup.html

(700BJ-AL**M, AL**B)

(700BJ-AL**E)

(700BJ-AL**A, AL**K)

*Same looking with new chassis.

Issue Date; 2003. 5.

Table of Contents

Summary of Contents for LG StudioWorks 700S

Page 1: Color Monitor
Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-131 MODEL: StudioWorks 700S (700BJ-AL**M, AL**B) StudioWorks 700B (700BJ-AL**E) StudioWorks 700E (700BJ-AL**A, AL**K) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MENU SELECT *Same looking with new chassis.
Page 2: Table Of Contents
CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM.....9 ADJUSTMENT ............11 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......13 TIMING CHART ............4 EXPLODED VIEW........... 23 OPERATING INSTRUCTIONS ........ 5 REPLACEMENT PARTS LIST ....... 25 WIRING DIAGRAM ..........6 PIN CONFIGURATION...........
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 << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Sync Total Period Video Active Sync Duration Front Porch Blanking Time Back Porch Resolution Mode Frequency Time (B) Polarity Sort –...
Page 5: Operating Instructions
OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW ID Label MENU SELECT Power ON/OFF Button See Front Control Panel AC Power Socket Signal Connector Front Control Panel MENU SELECT Button 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: Wiring Diagram
WIRING DIAGRAM P201 P405 P501 P701 P702 S + S P402 Socket P902 Signal Cable P302 P301 - 6 -...
Page 7: Disassembly
DISASSEMBLY 1. TILT/SWIVEL & BACK COVER REMOVAL 1) Set the monitor face downward. 2) Pull the latch (a), carefully remove the Tilt/Swivel by pulling it upward. 3) Pressing the latch (b), Back cover by pushing it upward. 4) Release the latch (c). 5) Slide the Back Cover away from the Front Cabinet of the monitor.
Page 8: Block Diagram
BLOCK DIAGRAM Dynamic Focus Static Focus Screen - 8 -...
Page 9: Description Of Block Diagram
DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 6. Horizontal and Vertical Oscillation. This is used for suppressing noise of power input line This circuit generates the horizontal pulse and the vertical flowing into the monitor and/or some noise generated in pulse by taking the H and V sync signal.
Page 10 15. Image Rotation (Tilt) Circuit. 17. Video Output Amp Circuit. This circuit corrects the tilt of the screen by supplying the This circuit amplifies the video signal which comes from image rotation signal to the tilt coil which is attached near the video pre-amp circuit and amplified it to applied the the deflection yoke of the CRT.
Page 11: Adjustment
ADJUSTMENT GENERAL INFORMATION 7) Adjust tilt as arrow keys to be the best condition. All adjustment are thoroughly checked and corrected 8) DIST. ADJ. → BALANCE command. when the monitor leaves the factory, but sometimes several adjustments may be required. 9) Adjust parallelogram as arrow keys to be the best Adjustment should be following procedure and after condition.
Page 12 14) Set Brightness and Contrast to Max position. 5. Input EDID Data. 1) Display color 15,0 cross hatch pattern at Mode 4. 15) Set SUB-CONTRAST 127(7F) (decimal) position. 2) EEPROM → Write EDID command and confirm 16) Set B-DRIVE to 85(55) at DRIVE of the alignment “EDID Write OK!!”...
Page 13: Troubleshooting Guide
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE FUSE OK? (F901) CHECK C908 VOLTAGE? TROUBLE IN (AC120V: 160VDC, D900 AC220V: 304VDC) CHECK TROUBLE IN IC901 PIN 6 Q901 WAVEFORM CHECK TROUBLE IN D941, D942, D941, D942, D951, D951, D961, D971 D961, D971...
Page 14 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC302 P302 5V LINE PIN 18(5V) ? TROUBLE IN CHECK PC SIGNAL, IC302 PIN 5, 6, 7? P301 SIGNAL CABLE CHECK TROUBLE IN IC302 PIN 19, 20, 21 ? IC302 CHECK TROUBLE IN IC303 PIN 4 (80V) P303 12V LINE/ PIN 8 (12V) ?
Page 15 3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK AMBER DPM MODE POWER INDICATOR (NO H and/or V SYNC) GREEN or AMBER? GREEN CHECK TROUBLE IN D712 ANODE D712 (-160V)? CHECK TROUBLE IN G1 VOLTAGE? Q799 (-55V~-15V) CHECK TROUBLE IN CDT HEAT D941, Q942, Q941 VOLTAGE? (6.3V)
Page 16 4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK TROUBLE IN Q706? Q706 CHECK TROUBLE IN B + VOLTAGE 50V LINE (50V)? CHECK T701(FBT) PIN 2 TROUBLE IN (31KHZ 60V, Q719, Q720, D710 69KHZ 140V) ? CHECK TROUBLE IN Q705 COLLECTOR Q705 WAVEFORM?
Page 17: Trouble In H-Linearity
5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 IC401 (MICOM) PIN 6, 7, 8 ? CHECK TROUBLE IN Q711~Q716? Q711 ~ Q716 CHECK TROUBLE IN L703? L703 Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) 30K ~ 33.9K TROUBLE IN 34K ~ 38.9K C722, C723, C726, C729 39K ~ 43.9K...
Page 18 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 3 D951 15V LINE (15V+)? CHECK TROUBLE IN IC701 PIN 12, 13? IC701 12Pin 13Pin TROUBLE IN IC601, V-CIRCUIT - 18 -...
Page 19 7. TROUBLE IN OSD (ENTER BUTTON MUST BE PRESSED.) NO OSD CHECK TROUBLE IN IC302 B + 5V LINE (5V) ? DC 5V CHECK TROUBLE IN IC302 PIN 1, 24 IC401 PIN 29 (V-FBP), WAVEFORM? IC701 PIN 1 LINE (H-FBP) Pin 1 Pin 24 TROUBLE IN...
Page 20 8. 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 30, 31 (H/V INPUT) DPM OFF MODE) SIGNAL? H/V SYNC CHECK TROUBLE IN IC401 PIN 13 X401 WAVEFORM? 24MHz...
Page 21: No Degaussing
9. NO DEGAUSSING NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) CHECK TROUBLE IN IC401 PIN 5 IC401 (MICOM) (0V)? CHECK TROUBLE IN Q953 COLLECTOR Q953 VOLTAGE? DC 15V CHECK TROUBLE IN P902 ? P902 CHECK TROUBLE IN RL901? RL901 TROUBLE IN...
Page 22 10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK TROUBLE IN IC401 PIN21 IC401 ( MI COM) WAVE FORM ? CHECK 15V LINE TROUBLE IN 15V LINE, 6.3V LINE AND 6.3V LINE ? CHECK TROUBLE IN Q503 EMITTER Q501~Q503 VOLTAGE ? TROUBLE IN...
Page 23 - 23 -...
Page 24: Exploded View Parts List
CABINET ASSY, CB777F BRAND C055 ABS - For India(700S), (700E) 3091TKC061C 3091TKC093B CABINET ASSEMBLY, CB777H BRAND C055 BLACK 92166 S/W700E DI LOCAL(LG:2 COLOR) - For Panama(700E) 6318L17015A CDT(CIRC), M41LFQ803X 00NGAA LG-PHILIPS 70KHZ 29.1MM FST MPR BARE - For Northern Hemisphere(700S) 6318L17015C CDT(CIRC), M41LFQ503X 00NGLD LG-PHILIPS 70KHZ 29.1MM FST GLARE BARE - For Northern Hemisphere(700E)
Page 25: 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: 2003. 5. 9. DATE: 2003. 5. 9. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
Page 26 DATE: 2003. 5. 9. DATE: 2003. 5. 9. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C805 0CE106CK638 10UF SHL,SD 50V M FM5 TP 5 D712 0DR100009CD RGP10G-1021 TIWAN SEMI TP DO C901 0CBZTBU002A BULK PCX2 335 224K...
Page 27 DATE: 2003. 5. 9. DATE: 2003. 5. 9. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION FB308 6210TCE003J BAS2550T BO SUNG 2550MM AXIA R207 0RD4300Q609 430 OHM 1/4 W(3.4) 5.00% TA5 FB309 6210TCE003J BAS2550T BO SUNG 2550MM AXIA...
Page 28 DATE: 2003. 5. 9. DATE: 2003. 5. 9. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R447 0RD1001Q609 1K 1/4W(3 5% TA52 R752 0RD2201Q609 2.20K 1/4W(3 5% TA52 R501 0RD0102A609 10 OHM 1/2 W (7.0) 5% TA52 R753 0RD3001Q609...
Page 29 DATE: 2003. 5. 9. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R951 971-0054 TIN 50MM TAPING R952 0RD1202A609 12K OHM 1/2 W(7.0) 5.00% TA5 R953 0RD1001A609 1K OHM 1/2 W (7.0) 5% TA52 R954 0RD4701Q609 4.70K 1/4W(3 5% TA52 R955 0RD4701Q609 4.70K 1/4W(3 5% TA52...
Page 30: Pin Configuration
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 SO8 (MN) Write Control 150mil Width Supply Voltage TSSOP8 (DW) 169mil Width Logic Dirgram Ground TDA4867J PHILIPS 32P, SDIP SYMBOL DESCRIPTION...
Page 31 TDA4841PS PHLIPS 32P HFLB FOCUS XRAY HSMOD HPLL2 BSENS HCAP HREF BDRV HBUF PGND HPLL1 HDRV SGND TDA4841PS XSEL VCAP VREF EWDRV VAGC VOUT2 VSMOD VOUT1 ASCOR VSYNC HSYBC CLBL HUNLOCK Pin Configuration EHT compensaton Block Diagram via vertical size EHT compensation via horizontal size 1.2V...
Page 32: Schematic Diagram
SCHEMATIC DIAGRAM DDC-SDA IIC-SDA DDC-SCL IIC-SCL - 32 - - 33 -...
Page 33: Printed Circuit Board
PRINTED CIRCUIT BOARD 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side) - 34 - - 35 -...
Page 34 May. 2003 P/NO : 3828TSL091Q Printed in Korea...

This manual is also suitable for:

Studioworks 700b Studioworks 700e