Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-124 FACTORY MODEL: FB770H MODEL: F700B (FB770H-EL) *( ) ID LABEL Model No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS SPECIFICATIONS ................................................... 2 SAFETY PRECAUTIONS ........................................ 3 TIMING CHART ....................................................... 4 OPERATING INSTRUCTIONS ................................ 5 CONTROL LOCATION ............................................ 7 WIRING DIAGRAM ................................................. 8 DISASSEMBLY ....................................................... 9 BLOCK DIAGRAM ............................
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 Frequency Total Period (A) Video Active Time (B) Blanking Time Sync Duration (E) (C) Back Porch (F) Front Porch (D) H – 37.50 26.67 20.32 6.35 2.03 3.81 0.51 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 AC Power Socket See Front Control Panel Power Button D-Sub Signal Connector Front Control Panel 3 4 1. Power Button This button is used to turn the monitor ON and OFF. 4. 2. Power Indicator This Indicator lights up green when the monitor operates normally. If the monitor is in DPM (Energy Saving) mode, this indicator color changes to amber. 3. MENU (or OSD) Button Use this button to enter or exit the on screen display.
OSD New Function Clear Time Menu On Clear Time Menu, Right Triangle button when ▷ button is pressed on the “Clear Time” menu, small window will be displayed on the right. On the bottom of OSD, CDT Time is Displayed.
CONTROL LOCATIONS VR901: B+ Adjustment (50V Line) -7-
WIRING DIAGRAM Anode Cap DY-Pin Degaussibg Coil P801 P902 P702 P201(Control PCB) P502 P405 P501 P402 -8-
DISASSEMBLY 1. TILT/SWIVEL & BACK COVER REMOVAL 1) Set the monitor face downward. 2) Carefully remove the Tilt/Swivel by pulling it upward. 3) Remove tne two screws (a). 4) Pressing the latch (b), Back cover by pushing it upward. (See Figure. 1) 4) Release the latch (c). (See Figure. 2 and Tip Spec.) 5) Slide the Back Cover away from the Front Cabinet of the monitor. Figure.1 (a) (a) (b) Tip Spec. A(Width) : 5.0~15.0mm B(Depth) : 0.6~0.9mm C(Height) : 12.0mm Figure.
- 10 - DEGAUSSING TILT COIL COIL POWER INPUT 100~240VAC (50/60Hz) Line Filter 13V 13V 13V -10V I2C DPM CONTROL CIRCUIT SMPS TRANS (T901) E2PROM (IC402) 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 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. 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.
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) Display color 15,0 full white patten at Mode 4. 20) Set Brightness and Contrast to Max position. 21) COLOR ADJ. → LUMINANCE → ABL command. 22) Adjust ABL to 32±1FL of the luminance. 23) After push the “ENTER” key, and “COMMAND → PRESET EXIT → Y(Yes)” command.
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 45K 49K 52K 58K 62K 66K TROUBLE IN C722, C723, C726, C729 - 19 - ~ ~ ~ ~ ~ ~ ~ ~ ~ 33.9K 38.9K 44.9K 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.
- 25 - 2 1 5 7 6 13 15 12 B 11 c b b 8 14 13 10 9 EXPLODED VIEW a 11 a A 3 4 16
EXPLODED VIEW PARTS LIST Ref. No. Part No. Description 3091TKC074F CABINET ASSEMBLY, FB770G BRAND 068 DI F700B For Europe, Israel, S.Africa, India 3091TKC074A CABINET ASSEMBLY, FB770G BRAND 068 For IOMG, USA, Russia 6318L17013A CDT(CIRC), M41QBF423X 41NPLD LG-PHILIPS 70KHZ 29.1MM FLATRON TCO- Northern hemisphere 6318L17013B CDT(CIRC), M41QBF423X 41QPLD LG-PHILIPS 70KHZ 29.
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. 10 . 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DATE: 2002. 10 . 10. DESCRIPTION / SPECIFICATION CAPACITORS C611 0CE477CF618 470UF SHL 16V M FL TP5 C201 0CN1040K949 0.1M 50V Z F TA52 C613 181-288Q MKT 100V 154JTR PHS26154 C301 0CK1040K945 0.
*S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION C750 0CK1040K945 0.1UF 50V Z F TR D310 0DS124409AA 1SS244 TP ROHM KOREA C751 181-288J MKT 100V 563JTR PHS26563 D311 0DS124409AA 1SS244 TP ROHM KOREA C752 0CQ4721N419 0.
*S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION TRANSISTORs D971 0DR100009DA RGP10J TP GULF SEMICONDUCTOR L ZD402 0DZ560009AG GDZJ5.6B TP GRANDE DO-34 500MW Q501 0TR320209AA KTC3202-Y(KTC1959) TP KEC TO92 ZD403 0DZ560009AG GDZJ5.6B TP GRANDE DO-34 500MW Q502 0TR127009AA KTA1270-Y(KTA562TM) TP KEC TO9 ZD404 0DZ560009AG GDZJ5.
*S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION R313 0RD1000Q609 100 1/4W(3 5% TA52 R447 0RD1001Q609 1K 1/4W(3 5% TA52 R314 0RD6800Q609 680 1/4W(3 5% TA52 R448 0RD1801Q609 1.80K 1/4W(3 5% TA52 R317 0RD2001Q609 2K 1/4W(3 5% TA52 R501 0RD0102A609 10 OHM 1/2 W (7.
*S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION R735 0RD1002Q609 10K 1/4W(3 5% TA52 R816 0RN3001F409 3K 1/6W 1% TA52 R736 0RX2201J609 2.2KOHM 1 W 5% TA52 R818 0RN6202F409 62KOHM 1/6 W 1% TA52 R737 0RN0560H609 0.56 1/2W 5 TA52 R821 0RD3001Q609 3K 1/4W(3 5% TA52 R738 0RN0560H609 0.
*S *AL LOC. NO. PART NO. DATE: 2002. 10. 10. DESCRIPTION / SPECIFICATION SW207 140-058D SKHV10911A LGEC NON 12 20 HORI T701 6174T11004A “1055A, CB777H LG-PHILIPS 17””/7” T702 6170TCZ013A EI2218 26UH D/FOCUS,FB775G T703 6170TCZ001D EI2218 4.0MH H-DRIVE,EB770G T901 6170TMZ138A EER3940 230UH V-16PIN FB770H S TH901 163-053E J502P61D4R5Q270 JA HWA 4.
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 - 33 - STV6888
: - 34 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 - 35 -
BLOCK DIAGRAM STV9211 - 36 -
STV9556 Pin Configuration 11 10 9 8 7 6 5 4 3 2 1 BLOCK DIAGRAM - 37 - OUT1 OUT2 OUT3 GNDP VDD GNDS GNDA IN3 VCC IN2 IN1
SCHEMATIC DIAGRAM DDC-SDA DDC-SCL NOTICE Since this is a basic schematic diagram. The value of components and some partial connection are sucject to be changed for improvement without notice.
PRINTED CIRCUIT BOARD 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4.
P/NO : 3828TSL091F Oct.
