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Now downloading free:LG CF900  [report bad file]  

Download LG CF900 docs - Computer monitors - CRT, TFT, LCD, touch screen, plasma display - service manuals and repair information

File information:
File name:CF 900 Studioworks 99T.part1.rar
[preview CF900] new window
Size:1855 kB
Extension:
MD5 Checksum:f08c30033f156c92befe6a9206f49ad8
Mfg:

LG

Model:

CF900

Original Chassis:
Descr:Manual completo
Group:Electronics > Computer equipment > Monitors >
Uploaded:2004-06-29 01:55:20
User:Fuentes
Multipart: 0  1  2

Information about the files in archive:
Decompress result:OK
Extracted files:14
File nameText
CF900_1.pdfSPECIFICATIONS 1. PICTURE TUBE Size Gun DefIection Angle Neck Diameter Phosphor Transmission Dot Pitch Face Treatment : 19 inch : In-line : 90 : 29.1 mm : P22 : 46% : 0.26 mm : ARASC (Anti-Reflection & Anti-Static Coating) 3. POWER SUPPLY 3-1. POWER RANGE AC 90V~140V / 180V~264V (Auto Select), 50/60Hz, 2.5A Max. 3-2. POWER CONSUMPTION MODE NORMAL (ON) STAND-BY SUSPEND H/V SYNC ON/ON OFF/ON ON/OFF OFF/OFF OUT OF RANGE POWER CONSUMPTION LED COLOR GREEN less than 120 W less than 15 W ORANGE less than 15 W less than 5 W less than 5 W ORANGE ORANGE 2. SIGNAL 2-1. HORIZONTAL & VERTICAL SYNC 1) Input Voltage Level : Low=0~0.8V, High=2.1~5.5V 2) Sync Polarity : Positive or Negative 3) Composite Sync Signal Vertical Sync Width :1H~10H. Serration Pulse : Non, 0.5H, 1H, EX-OR Equalize Pulse : Max 5H * Remark: H=Horizontal Period 2-2. VIDEO INPUT SIGNAL 1) Voltage Level : 0~0.7 V a) Color 0, 0 : 0 Vp-p b) Color 7, 0 : 0.467 Vp-p c) Color 15, 0 : 0.7 Vp-p 2) Input Impedance : 75 3) Video Colo
CF900_10.pdfDISASSEMBLY 1. TILT/SWIVEL REMOVAL Set the monitor faces bottom. Remove two screws Pressing the latch , carefully remove the Tilt/swivel by pulling it upward. 3. TOP SHIELD REMOVAL Remove four screws . Remove four screws . Remove four screws . 2. BACK COVER REMOVAL Remove two screw covers . Remove four screws from the Back Cover. Slide the Back Cover away from the Front Cabinet of the monitor. 4. FRONT CABNET & VIDEO ASSEMBLY REMOVAL Remove four screws . P605 and P606(pin) from the Main PCB. Remove tow screws from the Main Bracket to separate it from the Chassis Assembly and Front Cabinet. Discharge the remaining static electricity by shorting between the Anode Cap and the CRT ground. Disconnect the Anode Cap from the CRT. Carefully separate the CRT Assembly from the CRT neck. - 11 - 5. CRT & CRT FRAME ASSEMBLY REMOVAL Disconnect P902 (Degaussing pin) and P701(DY pin) from the Main PCB. Carefully separate the CRT Assembly from the Main Bracket. Remove five screws . Remove the CRT F
CF900_2.pdfTIMING CHART VIDEO C B D A E F SYNC FACTORY PRESET MODE MODE MARK H O R I Z O N T A L MODE 1 MODE 2 MODE 3 MODE 4 MODE5 MODE 6 MODE7 MODE8 MODE9 MODE10 MODE11 MODE12 Sync Polarity Frequency Total Period Video Active Time Blanking Time Front Porch Sync Duration Back Porch Sync Polarity kHz s s s s s s A B C D E F 31.469 31.778 25.422 6.356 0.636 3.813 1.907 43.269 23.111 17.778 5.333 1.556 1.556 2.222 31.470 31.780 25.420 6.360 0.640 3.810 1.910 37.880 26.400 20.000 6.400 1.000 3.200 2.200 53.674 18.631 14.222 4.409 0.569 1.138 2.702 48.360 20.680 15.750 4.920 0.370 2.090 2.460 60.020 16.670 13.000 3.660 0.200 1.220 2.240 68.677 14.561 10.836 3.725 0.508 1.016 2.201 63.981 15.630 11.852 3.778 0.444 1.037 2.296 91.150 10.971 8.127 2.845 0.305 1.016 1.524 81.250 12.308 9.117 3.191 0.365 1.094 1.732 93.750 10.667 7.901 2.765 0.316 0.948 1.501 V E R T I C A L Frequency Total Period Hz ms A B C D E F 59.940 16.683 15.253 1.430 0.318 0.064 1.048 640 85.008 11.764 11.093 0.6
CF900_3.pdfCONTROL LOCATIONS BRI/CONT CONTROL PCB OSD CONTROL PCB 1 SW201 2 3 4 SW205 5 SW203 7 6 SW204 SW202 VR202 VR201 8 VR517 MAIN PCB 9 VR955 10 VR548 INTERFACE PCB NO. 1 2 3 4 5 6 7 8 9 10 11 Ref. No. SW 201 VR 202 VR 201 SW205 SW203 SW204 SW202 VR 517 VR955 VR548 SW501 Control Function POWER SWITCH CONTRAST ( BRIGHTNESS ( SELECT RIGHT ( ENTER BUTTON EXIT BUTTON SELECT LEFT ( ) ABL ADJUSTMENT B+ ADJUSTMENT HIGH-VOLTAGE ADJUSTMENT RASTER CENTER SWITCH ) ) ) R G B H+V V VIDEO PCB -9- FBT 11 SW501
CF900_4.pdfADJUSTMENT GENERAL INFORMATION All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several minor adjustment may be required. Adjustment should be following procedure and after warming up for a minimum of 30 minutes. Alignment appliances and tools. - IBM compatible PC. - Programmable Signal Generator. (eg. VG-819 made by Astrodesign Co.) - E(E)PROM with each mode data saved. - Alignment Adaptor and Software. - Digital Voltmeter. - White Balance Meter. - Luminance Meter. - High-voltage Meter. AUTOMATIC AND MANUAL DEGAUSSING The degaussing coil is mounted around the CRT so that automatic degaussing when turn on the monitor. But a monitor is moved or faced in a different direction, become poor color purity cause of CRT magnetized, then press (DEGAUSSING) on the OSD menu. 2. Adjustment for High-Voltage Display cross hatch pattern at Mode 10. Adjust CDT Anode voltage to 26kV 0.5kV with VR548. 3. Check for Horizontal & Vertical OSC Frequency
CF900_5.pdfTROUBLE-SHOOTING GUIDE 1. NO POWER-1 NO POWER (POWER INDICATOR OFF) CHECK D901 DC VOLTAGE ? (250~350V) YES NO TROUBLE IN F901, R902, R903, TH901, IC902, P901, POWER CORD CHECK IC903 PIN 5 WAVEFORM ? NO TROUBLE IN IC903, SUB SMPS CIRCUIT YES CHECK C946 DC VOLTAGE ? (5.5~7V) NO TROUBLE IN R961, D917 YES CHECK IC909 OUTPUT VOLTAGE ? (DC 5.0V) NO TROUBLE IN IC909 B+ LINE YES TROUBLE IN IC801 (MICOM) - 18 - 2. NO POWER-2 NO POWER (LED COLOR IS ORANGE) CHECK H/V SYNC SIGNAL ? (IC801 PIN 29, 27 ) NO CHECK P802-P552, P702-P303, P553-P302, SIGNAL CABLE? NO TROUBLE IN IC801(MICOM) YES YES TROUBLE IN P802-P552, P702-P303, P553-P302, SIGNAL CABLE, BNC/D-SUB PCB TROUBLE IN BUTTON CONTROL PCB (KBD CIRCUIT) SEE NO.11 NO OSD CONTROL CHECK IC801 PIN 19 VOLTAGE WHEN POWER SWITCH PRESS ? (0.25 0.25V) NO YES CHECK IC801 PIN 41 ? (LOW) NO TROUBLE IN IC801(MICOM) YES TROUBLE IN MAIN SMPS (IC901, IC905, IC906, Q903, Q906, Q907, Q254) - 19 - 3. NO POWER-3 NO POWER (POWER I
CF900_6-b.pdfH/V SYNC SIGNAL DDC SIGNAL 12V 175V TCO COLLECTION POWER OFF STBY & SUS SCL SDA BNC (SIGNAL CABLE) SELECTION IC (IC551) 12V 5V R/G/B 75V R/G/B BRIGHTNESS BNC/D-SUB H/V R/G/B D-SUB (SIGNAL CABLE) EEPROM (IC802) 5V DEFLECTION YOKE TILT COIL 5V H/V CONTROL PANEL CONTRAST SPCC 5V ) CRT BRIGHTNESS ( CONTROL ( ( ENTER G 5V H CLAMP CLAMP GEN. (IC552) DRIVE CONTROL OSD SIGNAL(R/G/B) R/G BIAS ) ) R/G/B ADJUST ( ) 8 BIT CLAMP CONTROL VIDEO PRE-AMP M52320SP (Q307,308,309,IC301) VIDEO AMP. R/G/B VPS13 (IC302) EXIT ( ) MICOM MUTE S1 S2 BNC/D-SUB 5V BNC/D-SUB FBP SCL SDA R/B BIAS 50V 13.5V FOCUS V RAMP WAVE CLBL S3 S4 S2 S1 H-SIZE IC801 #23 TRAP H-SIZE V-SIZE H-CENTER V-CENTER SYNC SIGNAL PROCESSOR (Q551,552,553,554 Q555,556,558,560) TILT CONTROL (IC602, Q601,602) (IC801) S3 S4 0.7V/1.0V 175V TILT SIGNAL -10V 12V 1000V TILT MR ON/OFF MR CONTROL OSD PROCESSOR (IC303) IC906 R/B DRIVE DYNAMIC FOCUS OUTPUT (Q502,503,504) CLBL BRIGHT FBP MUTE V OUTPUT IC TDA8351 (IC601)
cf900_6-s.pdf
CF900_6-w.pdfWIRING DIAGRAM CDT Frame BRI/CONT CONTROL PCB OSD CONTROL PCB P203 P204 P201 P202 P802 MAIN PCB P803 P805 P606 P605 P501 P602 P702 P701 P502 P902 P552 INTERFACE PCB P551 P553 P305 P303 P302 P306 P301 P304 VIDEO PCB - 10 - FBT
CF900_7.pdf29 7 6 4 3 5 27 28 3-2 B 20 19 18 8 EXPLODED VIEW PARTS LIST 9 Ref. No. 1 Part No. 3091TKC020A 3091TKC020E 3091TKC020C 6318TH1901B 4951TKS019D 6868T19001B 6140TC2003A 339-002H 4814TKV007A 407-T76A 4814TKV008A 6174T13003B 407-T12B 4920TKP026A 4920TKK003A 407-T68H 6871TST055A 407-C42P 407-T96E 4920TKC004A 4920TKC003A 4814TKV010A 6871TSH031B 4814TKV011A 340-666A 381-231B 4951TKS011A 332-102C 4951TKK002A 3141TZZ022B 4815TKT002A 3809TKC008B 332-102C 3043TKK017B 6871TMT031C 6871TVT033C 6871TST029C 309-499B 3313T19001D Description CABINET ASS'Y FOR WORLD-WIDE CABINET ASS'Y FOR USA/CAN CABINET ASS'Y FOR FRANCE CDT, M46LLQ683 01(S), HITACHI FRAME ASS'Y CDT GROUND WIRE DEGAUSSING COIL SCREW, PHP+520(FEMY)+GW18 SHIELD, VIDEO FRONT PLATE, HEAT SINK FOR IC302 SHIELD, VIDEO REAR FBT, Y265373 PLATE, HEAT SINK FOR Q401, Q724 PLATE, HEAT SINK FOR Q911 PLATE, HEAT SINK FOR IC902 PLATE, HEAT SINK FOR IC909 PWB ASS'Y, SUB(TCO) PLATE, HEAT SINK FOR IC908 PLATE, HEAT SINK FOR Q421 PLATE, HEAT SINK FO
CF900_8-c.pdf7. CONTROL BOARD (Component Side) 8. CONTROL BOARD (Solder Side) - 33 -
CF900_8-i.pdf5. INTERFACE BOARD (Component Side) 6. INTERFACE BOARD (Solder Side) - 32 -
CF900_8-mc.pdfPRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) - 29 -
CF900_8-v.pdf3. VIDEO BOARD (Component Side) 4. VIDEO BOARD (Solder Side)
CF900_9.pdfREPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE : S SAFETY Mark AL ALTERNATIVE PARTS MODEL: 99T, CF900 *S *AL LOC. NO. MAIN BOARD CAPACITORs C203 C207 C208 C209 C210 C211 C222 C231 C241 C401 C402 C403 C404 C405 C408 C411 C415 C418 C419 C420 C421 C422 C423 C424 C427 C431 C441 C452 C456 C457 C460 C461 C462 C463 C471 C472 C501 PART NO. DESCRIPTION / SPECIFICATION DATE: 1997. 12 . 1. REMARK 0CH3104K946 0CE1056Q638 0CE2256R638 0CE4776F618 0CE1056K618 0CH3104K946 0CN5610K519 181-288P 0CH3222K516 181-309A 0CN1010K519 0CE2266K618 0CH3104K946 181-288M 0CE476CR630 0CK1030W510 0CH3104K946 0CN1010K519 0CE1056K618 0CH3104K946 0CX1500K409 0CH3104K946 0CH3104K946 181-288C 0CH3104K946 0CH3104K946 0CN1030H949 0CE4766H618 0CN1010K519 0CE2266Q630 181-288M 181-288M 181-305N 0CH3104K946 0CE3366K618 0CE1056K618 0CE1066K618 CAPACITOR, CHIP, [CERAMIC LD-LESS HD] 100000PF 50V CAPACITOR, AL.ELECTROLYTIC, 1UF SMS 200V M

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