LG 775FT FB775F-EA free download

File name Adjustment.pdf

ADJUSTMENT GENERAL INFORMATION All adjustment are thoroughly checked and corrected 7) Adjust tilt as arrow keys to be the best condition when the monitor leaves the factory, but sometimes 8) DIST. ADJ. BALANCE command. several adjustments may be required. 9) Adjust parallelogram as arrow keys to be the best Adjustment should be following procedure and after condition. warming up for a minimum of 30 minutes. 10) DIST. ADJ. BALANCE command. 11) Adjust balance of side-pincushion as arrow keys to · Alignment appliances and tools. be the best condition. - IBM compatible PC. 12) DIST. ADJ. FOS. ADJ command. - Programmable Signal Generator. 13) Adjust V-SIZE as arrow keys to 230±2mm. (eg. VG-819 made by Astrodesign Co.) 14) Adjust V-POSITION as arrow keys to center of the - EPROM or EEPROM with saved each mode data. - Alignment Adaptor and Software. screen. - Digital Voltmeter. 15) Adjust H-SIZE as arrow keys to 310±2mm. - White Balance Meter. 16) Adjust H-POSITION as arrow keys to center of the - Luminance Meter. screen. - High-voltage Meter. 17) Adjust S-PCC (Side-Pincushion) as arrow keys to be the best condition. AUTOMATIC AND MANUAL DEGAUSSING 18) Adjust TRAPEZOID as arrow keys to be the best The degaussing coil is mounted around the CDT so that condition. automatic degaussing when turn on the monitor. But a 19) PRESET EXIT Y (Yes) command. monitor is moved or faced in a different direction, become poor color purity cause of CDT magnetized, then press 4. Adjustment for White Balance and Luminance. DEGAUSS on the OSD menu. 1) Set the White Balance Meter. ADJUSTMENT PROCEDURE & METHOD 2) Press the DEGAUSS on the OSD menu for demagnetization - Install the cable for adjustment such as Figure 1and run of the CDT. the alignment program on the DOS for IBM compatible PC. 3) Set EXT- Brightness max and Sub-Brightness to 120 - Set external Brightness and Contrast volume to max position. (78h) position. 4) Display color 0,0 pattern at Mode 4. 1. Adjustment for B+ Voltage.

File name Block Diagram.pdf

[ OSD Con trol ] 12V Heater ( 6. 3V ) H Sync. sig . V Sync. Sig. I 2C DATA(SDA) I 2C CLOCK(SCL) G2 G1 Screen MICOM (IC401) 5V OSD IC (IC301) I2 C R/G/B Contrast R/G/B Bias 12V SCL / SDA H/V Sync S ignal PWM Control Signal 12V X-RAY Protection Circuit 15V E2PROM (IC402) H/V Sync. Processor 15V I2 C ( IC701 ) H/V Sync Signal 15V H Defleciton ( Q706) TDA4841 Vertical Output ( IC601) TDA4866J 40V I2 C Vertical Blanking, Brightness Contorl Circuit - 120V 80V CUT OFF Circuit (IC304) I2 C VIDEO Pre Amp. (IC302) DY VIDEO Main Amp. (IC303) R G B Input Signal 80V H.V CDT Dynomic Focus Static Focus BRIGHTNESS/CONTRAST COLOR CURVE H / V POSITION H / V SIZE SPCC TRAPIZODE PIN BALANCE PARALLELOGRAM ROTATION TOP CORNER BOTTOM CORMOR RECALL DEGAUSSING MOIRE LANGUAGE PURITY 5V 6.3V TILT Coil TILT Control Cir . BLOCK DIAGRAM Voltage feedback - 10 H Drive 80V 50V SMPS (T901) 15V 6.3V 5V Voltage Feedback Regulation Circuit DC/DC Converter B-Drive 50V Power Control IC (IC901) Energy Savi ng Control Cir . PURITY Coil PURITY Control Cir . FBT ( T701 ) 6.3V B+ 15V H-Linearity Cir . 850V Dynamic Focus Cir. 15V Auto Beam Limit Circuit Degaussing Cir . 15V Degaussing Coil Line Filter D/D Feed Back Input Voltage 100~240VAC (50/60Hz) DESCRIPTION OF BLOCK DIAGRAM 1. SMPS(Switching Mode Power Supply) When you turn on the power switch, the operating procedure is as follows: 1) The AC line voltage is rectified by the bridge diodes D900 and C908 2) The control IC(IC901) starts switching and generates switching pulses in the primary turns of the SMPS transformer (T901) 3) The switching pulses of the primary turns induce the secondary pulse of the transformer by the turn ratio. These pulses are rectified by each diode (D971,D961,D961-1,D951,D942 and D941) 4) Each rectified DC voltage (80V, 50V, 15V, 6.3V and 5V) is supplied to the main circuit. 2. Over Voltage Protection Circuit When the input voltage of IC901 Vin(pin 7) is more than Spec Voltage , all the secondary voltages of the SMPS transformer (T901) down to low value. 3. Display Power Management Circuit 1) Stand-by and Suspend mode. When no input of horizontal or vertical sync, Q951 and Q952 are turned off.. then input power consumption is below 15 watts 2) OFF mode When no input of horizontal and vertical sync, Q942 is turned off and all the secondary voltages of the SMPS transformer (T901) down to low value. Then input power consumption is below 3 watts 4. X-ray Protection Circuit If the high voltage of the FBT reaches up to 29KV IN an abnormal case, Q807 operates and IC401 pin 41 came to low level, then IC401 control IC701 to stop Horizontal drive pulse and stop Horizontal deflection. 5. Microprocessor Control Circuit. 1) Horizontal and Vertical sync signals are supplied to the microprocessor (IC401). 2) Microprocessor(IC401) discriminates the operating mode from the sync. polarity and resolution.. 3) After microprocessor reads these adjusted mode data stored at EEPROM, it controls operating mode dat

File name Control Locations.pdf

CONTROL LOCATIONS VR901: B+ Adjustment (50V Line) -6-

File name Disassembly.pdf

DISASSEMBLY 1. TILT/SWIVEL REMOVAL 1) Set the monitor face downward. 2) Pressing the latch (a), carefully remove the Tilt/Swivel by pulling it upward. 2. BACK COVER REMOVAL 1) Remove two screws cap (a). 2) Remove four screws (b) from the Back Cover. 3) Slide the Back Cover away from the Front Cabinet of the monitor. (b) (a) (a) (b) (a) 3. TOTAL CHASSIS ASSEMBLY REMOVAL 1) Disconnect P902(Degaussing pin), P704(DY pin), P501(Tilt pin), P502(Purity pin), P401, P402 and P701, P702, P703 from the Main PCB. 2) Remove eight connect (a). 3) Carefully separate the CDT Board Assembly from the CDT neck. 4) Discharge the remaining static electricity by shorting between the Anode Cap and the CDT ground. 5) Disconnect the Anode Cap from the CDT. 6) Remove two screws (b). 7) Remove the Total Chassis Assembly from the Main Frame. Anode Cap DY Assembly screw (a) OS D (a) SE T P7 03 (b) (a) P701 P704 P702 Control PCB P401 (P201) P402 P501 P502 P902 (a) (b) -8- 4. VIDEO PCB ASSEMBLY REMOVAL 1) Remove three connect (a). 2) Disconnect P301, P302 from the Video PCB Assembly. 3) Remove screw (b). 4) Remove the Video PCB Assembly. 5. CONTROL PCB ASSEMBLY REMOVAL 1) Remove three screws (a). 2) Remove the Control PCB Assembly from the Front Cabinet. OS (a) P302 P301 D SE T (a) (b) (a) (a) (a) (a) 6. MAIN PCB ASSEMBLY REMOVAL 1) Remove holder (a). 2) Remove the Bracket Guide. 3) Remove four screws (b). 4) Remove the Main PCB Assembly. (b) (b) (b) (b) (a) (a) Bracket Guide -9-

File name Exploded View.pdf

EXPLODED VIEW 3 15 17 5 B A 8 16 9 6 2 18 Ref. No. 1 2 3 4 5 6 7 8 Part No. 3091TKC071A 2423GC3E41M 3809TKC032A 3043TKK040J 339-002H 6140TC2014A 6871TST224A 6174T13007B 6620TBD003A 4810TKK169B 4810TKK168B 4930TKK021A 4950TKS171A 4810TKK167B 3550TKK061B 3550TKK061A 332-102P 332-102J 6871TMT224A 6871TVT224A 3313T17064A EXPLODED VIEW PARTS LIST Description CABINET ASS'Y, FB775F BRAND 032 CDT SET, M41QBF423X 31NPLD BACK COVER ASS'Y, FB795C 031 C-CORE SLIM TILT SWIVEL ASS'Y, FB775B B029 T032 HIPS 85964 SCREW ASS'Y, PHP+5*20(FZMY)+GW18 NEW TYPE COIL,DEGAUSSING, 1410MM 16.0OHM 0.5MM 130T 17" WITH EARTH PWB(PCB) ASSEMBLY,SUB, FB775F XKGC BRAND CONTROL TOTAL FBT, (FLY BACK TRANSFORMER), FLG0096 SAMPO 17"/70KHZ FLAT SOCKET (CIRC), CPT, PCS701E PARK ELEC. 10PIN 14/360 STRAIGHT BRACKET, FB775F GUIDE PCB(L) PC+ABS BRACKET, FB775F GUIDE PCB(R) PC+ABS HOLDER, PCB FIX MAIN METAL SHIELD BOTTOM, FB775E BRACKET, FB775F SUPPORTER CDT PC+ABS COVER, FB795B SCREW LEFT COVER, FB795B SCREW RIGHT SCREW, PTP 4*30[MSWR/FZMCWY-1] SCREW, PTP 4*20[FZMY] PWB(PCB) ASSEMBLY, MAIN, FB775F XKGC BRAND CA-92 TOTAL PWB(PCB) ASSEMBLY, VIDEO, FB775F XKGC BRAND VIDEO TOTAL MAIN TOTAL ASS'Y, FB775F TEMP BRAND NO 7 12 10 13 4 9 10 11 12 13 14 15 12 16 14 OS D 17 11 18 SE T C 1 A B C

File name Schematic Diagram.pdf

80V 0V 1B 4.5V 0V 1B 10ms 8.7V 0V 1B 557V 435V 1200V 100V 34V 0V 0V 300V 10 37V 0V 1B

File name Specifications.pdf

SPECIFICATIONS 1. PICTURE TUBE Size DefIection Angle Neck Diameter Stripe Pitch Face Treatment Internal : 17 inch (Flat Slot Mask) : 90° : 29.1mm : 0.24mm : W-ARAS(Anti-Reflection and Anti-Static Coating) : Anti-Glare 3. POWER SUPPLY 3-1. Power Range AC 100~240V 50/60Hz, 2.0A 3-2. Power Consumption MODE NORMAL (ON) STAND-BY SUSPEND OFF H/V SYNC ON/ON OFF/ON ON/OFF OFF/OFF POWER CONSUMPTION LED COLOR GREEN less than 74W less than 15W AMBER 2. SIGNAL 2-1. Horizontal & Vertical Sync 1) Input Voltage Level : Low=0~1.2V, High=2.5~5.5V 2) Sync Polarity : Positive or Negative 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 less than 15W less than 3W AMBER : 0 ~ 0.7 Vp-p : 0 Vp-p : 0.467 Vp-p : 0.7 Vp-p : 75 : R, G, B Analog : Refer to the Timing Chart 4. DISPLAY AREA 4-1. Active Video Area : 325.4 x 244.1mm(12.81" x 9.61") 4-2. Display Color : Full Colors 4-3. Display Resolution : 1280 x 1024 / 60Hz (Non-Interlace) 4-4. Video Bandwidth : 110MHz 5. ENVIRONMENT 5-1. Operating Temperature: 0°C ~ 35°C 5-2. Relative Humidity : 10% ~ 90% (Non-condensing) 5-3. Altitude : 5,000m 6. DIMENSIONS (with TILT/SWIVEL) Width : 415.0mm (16.34 inch) Depth : 439.0mm (17.28 inch) Height : 435.0mm (17.13 inch) 7. WEIGHT (with TILT/SWIVEL) Net Weight : 17.8kg (39.24 lbs.) Gross Weight : 20.0kg (44.09 lbs.) 2-3. Signal Connector 15-pin Attached Connector 2-4. Scanning Frequency Horizontal Vertical : 30 ~ 70 kHz : 50 ~ 160 Hz

File name Timing Chart.pdf

TIMING CHART VIDEO B A C E D F SYNC FACTORY PRESET MODE MODE MARK H O R I Z O N T A L MODE 1 -- MODE 2 + 46.88 21.33 16.16 5.17 0.32 1.62 3.23 + 75.01 13.331 12.798 0.533 0.021 0.064 0.448 800 x 600 75Hz Yes MODE 3 + 53.68 18.63 14.22 4.41 0.57 1.14 2.70 + 85.07 11.755 11.178 0.577 0.018 0.056 0.503 800 x 600 85Hz Yes MODE 4 + 68.677 14.561 10.836 3.725 0.508 1.016 2.201 + 85.00 11.764 11.182 0.582 0.014 0.044 0.524 1024 x 768 85Hz Yes MODE 5 -- 31.47 31.78 25.42 6.36 0.64 3.81 1.91 + 70.08 14.269 12.712 1.557 0.414 0.063 1.080 640 x 400 70Hz Yes MODE 6 -- 31.47 31.78 25.42 6.36 0.64 3.81 1.91 -- 59.94 16.684 15.254 1.430 0.318 0.063 1.049 640 x 480 60Hz Yes MODE 7 + 37.88 26.40 20.00 6.40 1.00 3.20 2.20 + 60.32 16.579 15.840 0.739 0.026 0.106 0.607 800 x 600 60Hz Yes MODE 8 -- 43.269 23.112 17.778 5.334 1.556 1.556 2.222 -- 85.008 11.764 11.093 0.670 0.023 0.069 0.578 640 x 480 85Hz Yes MODE 9 + 60.02 16.66 13.00 3.66 0.20 1.22 2.24 + 75.03 13.328 12.795 0.533 0.017 0.050 0.466 1024 x 768 75Hz Yes MODE 10 + 63.98 15.63 11.85 3.78 0.44 1.04 2.30 + 60.02 16.661 16.005 0.656 0.015 0.047 0.594 1280 x 1024 60Hz Yes Sync Polarity Frequency Total Period Video Active Time Blanking Time Front Porch Sync Duration Back Porch Sync Polarity kHz µs µs µs µs µs µs E A B C D F 37.50 26.67 20.32 6.35 0.51 2.03 3.81 -- V E R T I C A L Frequency Total Period Video Active Time Blanking Time Front Porch Sync Duration Back Porch Hz ms ms ms ms ms ms E A B C D F 74.99 13.335 12.802 0.533 0.026 0.080 0.427 640 x 480 75Hz Yes Resolution Recall * Mode 1~Mode 4: Basic Mode (Mode 5~Mode 10: Default Mode) -4-

File name Trouble shooting.pdf

TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK FUSE OK? (F901) YES NO TROUBLE IN FUSE (F901) CHECK C908 VOLTAGE? (AC120V: 160VDC, AC220V: 304VDC) NO TROUBLE IN D900 YES CHECK IC901 PIN 6 WAVEFORM (SQUARE WAVE COMES OUT?) NO TROUBLE IN IC901 YES CHECK D941, D942, D951, D961, D961-1, D971 VOLTAGE? NO TROUBLE IN D941, D942, D951, D961, D961-1, D971 YES TROUBLE IN D908, ZD902, Q903, Q972, Q971, Q952, Q951, Q942, Q941 - 14 - 2. NO CHARACTER NO CHARACTER CHECK IC302 PIN 9 (5V) ? YES NO TROUBLE IN P302 5V LINE CHECK IC302 PIN 5, 6, 7 ? NO TROUBLE IN PC SIGNAL, P301 SIGNAL CABLE YES CHECK IC302 PIN 18, 19, 20 ? NO TROUBLE IN IC302 YES CHECK IC303 PIN 4 (80V) PIN 8 (12V) ? NO TROUBLE IN P302 12V LINE/ 80V LINE YES CHECK IC303 PIN 1, 2, 3 ? NO TROUBLE IN IC303 YES CHECK R, G, B CATHODE VOLTAGE? YES TROUBLE IN IC304 / CRT SOCKET TROUBLE IN R341~R343, R331~R333, L311~L313, D307~D315 NO - 15 - 3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK POWER INDICATOR GREEN or ORANGE? ORANGE DPM MODE (NO H and/or V SYNC) GREEN CHECK D712 ANODE (-160V)? NO TROUBLE IN D712 YES CHECK G1 VOLTAGE? (-45 ~ -55V) NO TROUBLE IN Q704 YES CHECK CDT HEAT VOLTAGE? (6.3V) NO TROUBLE IN D941, Q942, Q941 YES TROUBLE IN CDT - 16 - 4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK Q706? NO TROUBLE IN Q706 YES CHECK B+ VOLTAGE (49V)? NO TROUBLE IN 50V LINE YES CHECK T701(FBT) PIN 2 (31KHZ, 60V 69KHZ, 130V ? NO TROUBLE IN Q719, Q720, D710 YES CHECK Q705 COLLECTOR WAVEFORM? NO TROUBLE IN Q705 0V T YES TROUBLE IN T701, P701 - 17 - 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK IC401 PIN 22, 23, 24 ? NO TROUBLE IN IC401 (MICOM) YES CHECK Q711~Q716? NO TROUBLE IN Q711 ~ Q716 YES CHECK L703, Q710, D730? NO TROUBLE IN L703, Q710, D730 YES Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) Cs1 L L H L H L H Cs2 L H H L L H H Cs3 L L L H H H H TROUBLE IN C722, C723, C726, C729 30K 34K 40K 45K 48K 56K 66K ~ ~ ~ ~ ~ ~ ~ 34K 40K 45K 48K 56K 66K 70K - 18 - 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK IC601 PIN 3 (15V)? NO TROUBLE IN R603 15V LINE YES CHECK IC601 PIN 7 (40V)? NO TROUBLE IN HIGH-VOLTAGE OUT CIRCUIT(FBT), D721, R606 YES CHECK IC701 PIN 12, 13? NO TROUBLE IN IC701 3V YES TROUBLE IN IC601, V-CIRCUIT - 19 - 7. TROUBLE IN OSD NO OSD (ENTER BUTTON MUST BE PRESSED.) CHECK IC301 B+ ? NO TROUBLE IN 5V LINE DC 5V YES CHECK IC301 PIN 5, 10 WAVEFORM? Pin 10 5V NO TROUBLE IN IC601 PIN8 (V-FBP), T701 40V LINE (H-FBP) Pin 5 YES CHECK IC301 PIN 12 WAVEFORM ? H+V 5V NO TROUBLE IN IC302, IC301 YES CHECK IC301 PIN 13, 14, 15 ? H+V 5V NO TROUBLE IN IC301, IC302 YES TROUBLE IN OSD PERIPHERAL CIRCUIT - 20 - 8. TROUBLE IN DPM OFF MODE FAILURE (NO OFF MODE.) CHECK IC401 (MICOM) PIN 30, 31 (H/V INPUT) SIGNAL? NO INPUT H/V SYNC SIGNAL CHECK PC, (PC IS NOT GOING INTO DPM OFF MODE) YES H/V SYNC CHECK

File name Wiring Diagram.pdf

WIRING DIAGRAM P201 P501 P502 P402 P401 P702 S+ S P902 P701 FBT P703 AC Socket Signal Cable P302 P301 G2 -7-