SERVICE MANUAL COLOR MONITOR P993Z Series EX951F CTX P/N : P993Z-3-00-A Date : Jun-02-03 Version : A00 THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES, ERRORS OR OMISSIONS, MANUFACTURE DATE : Jun. 2003 1 TABLE OF CONTENTS PAGE 1. SPECIFICATIONS ..................................................................................................... 2. PRECAUTION AND NOTICES ................................................................................ 2-1 SAFETY PRECAUTIONS .............................................................................. 2-2 PRODUCT SAFETY NOTICE ....................................................................... 2-3 SERVICE NOTES ........................................................................................... 2-4 HIGH VOLTAGE WARNING ....................................................................... OPERATING INSTRUCTIONS ................................................................................ ADJUSTMENT .......................................................................................................... 4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ............................... 4-2 MAIN ADJUSTMENTS ................................................................................. 4-3 ADJUSTMENT METHOD ............................................................................. CIRCUIT DESCRIPTION .......................................................................................... TROUBLE SHOOTING CHART .............................................................................. 6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS .............................. 6-2 ABNORMAL DISPLAY ................................................................................. 6-3 NO BLANKING ........................................................................................... 6-4 HOR. /OSC /DEF /HV CIRCUIT FAULT ...................................................... 6-5 ABNORMAL HORIZONTAL DEFLECTION .............................................. 6-6 ABNORMAL VERTICAL SCANNING ........................................................ 6-7 SIDE-PIN CUSHION DISTORTION ............................................................. 6-8 POOR FOCUS ................................................................................................. 6-9 NO SOUND (FOR AUDIO MODEL ONLY)................................................ 6-10 POWER SUPPLY TROUBLE SHOOTING CHART .................................... MECHANICAL OF CABINET FRONT DIS-ASSEMBLY...................................... PARTS LISTING ....................................................................................................... IC BLOCK DIAGRAMS............................................................................................ 3-4 5 5 5 5 6 7 8 8 8 8-11 11-13 14 14-15 16 17 17 18 19 19 20 20 21 22 23-41 42-46 47-48 49 3. 4. 5. 6. 7. 8. 9. 10. PCB LAYOUT ............................................................................................................ 11. SCHEMATIC DIAGRAM ......................................................................................... 2 1. SPECIFICATIONS FOR 9Klr SERIES COLOR MONITOR 1. 2. 3. 4. CRT : 46CM(19") 90 Deflection, 29mm Neck, flat 0.25mm Dot Pitch, Non-Glare Screen Viewable image Size: 45.7CM (18") diagonal Display Color: Unlimited Colors External Controls: Power On/Off, OSD key, Function knob: Contrast, Brightness, H-Size, H-Center, V-Size, V-Center, ZOOM, Pincushion, Trapezoid, Pin-Balance, Parallelogram, Rotation, Moire Reduce, Recall, Degaussing, Color Temperature, Volume. (For 9KlrA Model) Input Video Signal Mode 1 Mode 2 Mode 3 Mode 4 RGB Analog RGB Analog RGB Analog RGB Analog TTL Level TTL Level TTL Level TTL Level Negative Negative Negative Positive TTL Level TTL Level TTL Level TTL Level Positive Negative Negative Positive 720 (H) 400 (V) 31.327 69.616 640 (H) 480 (V) 31.469 59.9 640 (H) 480(V) 43.269 85.008 800 (H) 600(V) 53.750 84.997 5. Horiz. Sync: Vert. Sync: Horizontal: Vertical : Fh (kHz): Fv (Hz) : Horiz. Sync: Vert. Sync: Horizontal: Vertical : Fh (kHz): Fv (Hz) : 6. Display Size Horizontal: Vertical: Mode 5 Mode 6 Mode 7 Mode 8 RGB Analog RGB Analog RGB Analog RGB Analog TTL Level TTL Level TTL Level TTL Level Positive Positive Positive Positive TTL Level TTL Level TTL Level TTL Level Positive Positive Positive Positive 1024 (H) 768 (V) 68.677 84.997 1280 (H) 960 (V) 85.935 85 1280 (H) 1024 (V) 91.148 85 1600 (H) 1200 (V) 93.75 75 346 mm 260 mm 7. Scanning Frequencies Horizontal: 30KHz ~ 98KHz Vertical: 50 Hz ~ 160 Hz Factory Preset Timings: 8 User Timings: 20 Mis-convergence Center: Corner: 0.3 mm Max. 0.4 mm Max. 200 MHz 8. 9. 10. Video Dot Rate: 3 11. Power Source: Switching Mode Power Supply AC 100 ~240V, 50/60Hz Universal Type 12. Operating Temperature: 0°C to 40°C Ambient 13. Humidity : 10% to 85% Relative, Non-Condensing 14· Weight: 15 20.0 Kg (Net), 23.6Kg (Gross) for 9Klr Dimensions Monitor: Carton: 575(W) × 526(H) × 655(D) mm Monitor: 446(W) × 436(H) ×455 (D) mm for 9Klr 16. External Connection : 15 Pin D-type Connector AC Power Cord 17. Speaker: Rate power: Impedance: (for 9KlrA only) 1.5W (per channel) 8 18. Regulations: UL, CSA, FDA, FCC, TÜV/GS, CE, Energy Star, MPR-II TCO 4 2. PRECAUTIONS AND NOTICES 2-1 SAFETY PRECAUTIONS 1. 2. 3. 4. 5. 6. Observe all caution and safety related notes located inside the display cabinet. Operation of the display with the cover removed, may cause a serious shock hazard from the display power supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment. Do not install, remove or handle the picture tube in any manner unless shatter-proof goggles are worn. People who are not so equipped should be kept away while handling picture tube. Keep picture tube away from the body while handling. The picture tube is constructed to limit X-RAY radiation to 0.5 mR/HR. For continued protection, use the designated replacement tube only, and adjust the voltages so that the designated maximum rating at the anode will not be exceeded. Symbol " " means safety relative parts. The use of substitute replacement parts which do not have the same characteristics as specified in the parts list may create shock, fire or explode etc. Symbol "" means important relative parts. Before replacing any of these components please read the parts list in this manual carefully to avoid creating higher anode voltage or x-ray. Especially for sealed controls, such as VR902, VR702 and FBT screen VR etc, which were sealed by the manufacturer once their optimum position has been set, please don't dismantle them as your likes, otherwise you will break or damage the component. If you need replace the parts with sealed control, please adjust the relative VR to make sure the B+ voltage under 137.5Vdc at 1024*768@85Hz and well seal it with A+B glue or equivalent, which you can not move away with one screw driver. Before returning a serviced display to the customer, a thorough safety test must be performed to verify that the display is safe to operate without danger or shock. Always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as screw heads. Test method for current leakage is described as follow. (a) Plug the AC line cord directly into rated AC outlet (do not use a line isolation transformer during this check). (b) Use an AC voltmeter having 5000 ohms per volt or with more sensitivity in the following manner: Connect a 1500 ohms 10 Watt resistor, paralleled by a 0.15UF, AC type capacitor between a known good earth ground (water pipe, conduit, etc.) and the exposed metallic parts simultaneously. Measure the AC voltage across the combination of 1500 ohms resistor and 0.15UF capacitor. (c) Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic part. (d) Voltage measured must not exceed 0.5 volts RMS. This corresponds to 0.35 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately. 7. 2-2 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Before replacing any of these components read the parts list in this manual carefully. The use of substitute replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-RAY radiation or other hazards. 2-3 SERVICE NOTES 1. 2. 3. 4. When replacing parts or circuit boards, clamp the lead wires around terminals before soldering. When replacing a high wattage resistor (more than 1/2W of metal oxide film resistor) in circuit board, keep the resistor about 10mm (1/2 in) away from circuit board. Keep wires away from high voltage or high temperature components. Keep wires in their original position so as to reduce interference. 5 2-4 HIGH VOLTAGE WARNING Operation of monitor outside of cabinet or with back removed may cause a serious shock hazard. Work on this model should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. Exercise care when servicing this chassis with power applied. Many B plus and high voltage terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain interconnecting ground lead connections between chassis and picture tube dag when operating chassis. Certain HV failures can increase X-ray radiation. Monitor should not be operated with HV levels exceeding the specified rating for the chassis type. The maximum operating HV specified for the chassis used in this monitor is 26.5KV ± 1KV with a line voltage of 120/240 VAC. Higher voltage may also increase possibility of failure in HV supply. It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating supply voltages. No changes should be made to the original design of the monitor. Components shown in the shaded areas on the schematic should be replaced with exact factory replacement parts. The use of unauthorized substitute parts may create a shock, fire or other hazard. To determine the presence of high voltage, use an accurate, high impedance, HV meter connected between second anode lead and CRT dag grounding device. When servicing the High Voltage System, remove static charge from it by connecting a 20K ohm resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead.(AC line cord disconnected from AC power outlet.) The picture tube used in this monitor employs integral implosion protection. Replace with tube of the same type number for continue safety. Do not lift picture tube by the neck. Handle the picture tube only after discharging the high voltage completely. 6 3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the 9K color display. 1. Position the display on the desired operation and plug the power cord into a convenient AC outlet. Threewire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduit ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential. 2. Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on the connector to ensure firm grounding. The connector information is as follow: 1 6 11 5 10 15 15 - Pin Color Display Signal Cable PIN NO. 1. 2. 3. 4. 5. 6. 7. 8. 3. 4. 5. 6. DESCRIPTION RED GREEN BLUE GND GND GND-R GND-G GND-B PIN NO. 9. 10. 11. 12. 13. 14. 15. DESCRIPTION NC GND SYNC. GND SDA HORIZ. SYNC VERT. SYNC (VCLK) SCL Apply power to the display by turning the power switch to the "ON" position and allow about thirty seconds for display tube warm-up. The Power-On indicator lights when the display is on. With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and contrast to the most pleasing display. This monitor has power saving function following the VESA DPMS. Be sure to connect the signal cable to the PC. If your 9K Series color display requires service, it must be returned with the power cord. 7 4. ADJUSTMENT 4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS 1. 2. A ...