[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-561162-105":59,"doc-detail-561162-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","alignment-and-adjustments-section-4-tv-color-tuning-and-purity-procedures","Alignment and Adjustments - Section 4 - TV Color Tuning and Purity Procedures","","Service instructions for TV alignment covering general checks, automatic degaussing, and high-voltage verification, followed by focus and screen adjustments. Includes procedures for screen setup using service mode settings and a detailed screen adjustment table by CRT size and models. Provides guidance for EEPROM (IC902) replacement with full readjustment, plus white-balance calibration using color analyzer equipment, service-mode video adjustments, and region-specific high/low luminance and chromaticity targets.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/alignment-and-adjustments-section-4-tv-color-tuning-and-purity-procedures/561162/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/alignment-and-adjustments-section-4-tv-color-tuning-and-purity-procedures/561162.png","ImageObject",300,407,{"name":92,"@type":93},"McQueen","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-20","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What initial checks should be done before detailed TV alignment?","Question",{"text":112,"@type":113},"Verify basic picture characteristics such as height, horizontal and vertical sync, and focus. Check for good black-and-white details and address any objectionable color shading as described in the following degaussing and adjustment procedures.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the automatic degaussing process work and what if color shading remains?",{"text":117,"@type":113},"A degaussing coil operates for about one second after power is switched ON. If the TV is moved or turned differently, power should be OFF for at least 10 minutes; if shading persists, perform Color purity and Convergence adjustments or use an external degaussing coil by slowly moving it around the picture tube faceplate and cabinet sides, then withdrawing and powering off.",{"name":119,"@type":110,"acceptedAnswer":120},"What is required after replacing E2PROM (IC902)?",{"text":121,"@type":113},"After IC902 is replaced, all adjustment data revert to initial values, so all adjustment values must be readjusted during servicing. Then connect AC power, turn the TV on, and warm up in standby before proceeding with power-on adjustments.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},561162,1791835736,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},5909890329169,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Alignment and Adjustments  \n\n| 4. Alignment and Adjustments |  |  |\n| --- | --- | --- |\n| 4-1 General Alignment Instructions |  |  |\n| 1. Usually, a color TV-VCR needs only slight | 5. | Avoid overload. Excessive signal from a |\n| touch-up adjustment upon installation. Check |  | sweep generator might overload the front-end |\n| the basic characteristics such as height, |  | of the TV. When inserting signal markers, do |\n| horizontal and vertical sync and focus. |  | not allow the marker generator to distort test results. |\n| 2. Observe the picture for good black and white |  |  |\n| details. There should be objectionable color | 6. | Connect the TV only to an AC power source |\n| shading; if color shading is present, |  | with voltage and frequency as specified on the |\n| demagnetize, perform purity and convergence adjustments described below. |  | backcover nameplate. |\n| 3. Use the specified test equipment or its | 7. | Do not attempt to connect or disconnect any wires while the TV is turned on. Make sure |\n| equivalent. |  | that the power cord is disconnected before replacing any parts. |\n| 4. Correct impedance matching is essential. | 8. | To protect against shock hazard, use an isolation transformer. |\n| 4-2 Automatic Degaussing |  |  |\n| A degaussing coil is mounted around the |  | If the chassis or parts of the cabinet become |\n| picture tube, so that external degaussing after |  | magnetized, poor color purity will result. If |\n| moving the TV should be unnecessary. But |  | this happens, use an external degaussing coil. |\n| the receiver must be properly degaussed upon |  | Slowly move the degaussing coil around the |\n| installation. |  | faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil |\n| The degaussing coil operates for about 1 |  | to a distance of about 6 feet before turning |\n| second after the power is switched ON. If theset is moved or turned in a different direction, |  | power OFF. |\n| the power should be OFF for at least 10 |  | If color shading persists, perform the |\n| minutes. |  | following Color purity and Convergence adjustments. |\n| 4-3 High Voltage Check |  |  |\n\nCAUTION : There is no high voltage adjustment on this chassis. The B+ power supply should be +135 volts (with full color- bar input and normal picture level) .  \n1. Connect a digital voltmeter to the second anode of the picture tube.  \n2. Turn on the TV. Set the Brightness and Contrast controls to minimum (zero beam current) .  \n3. Adjust the Brightness and contrast controls to both extremes. Ensure that the high voltage does not exceed 30 KV under any conditions.  \nAlignment and Adjustments  \n4-4 FOCUS Adjustment  \n1. Input a black and white signal.  \n2. Adjust the tuning control for the clearest picture.  \n3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.  \n4-5 SCREEN Adjustment  \n1. Input Toshiba Pattern  \n2. Enter “Service Mode”. (Refer to “4-8-1 Service Mode”)  \n3. Select “G2-Adjust”.  \n4. Set the values as below.  \nTable 1. Screen Adjustment Table  \n\n| No | INCH / CRT | IBRM | WDRV | CDL | COLR G B\u003Cbr>(Smallest Value) | REGION |\n| --- | --- | --- | --- | --- | --- | --- |\n| 1 | 14” / SDI | 205 | 35 | 100 | 100 | Noraml |\n| 2 | 15PF / SDI | 220 | 35 | 180 | 100 |  |\n|  |  | 215 | 35 | 100 | 100 | CIS |\n| 3 | 21” 1. 7R / SDI | 220 | 35 | 180 | 100 | Noraml |\n| 4 | 21” 1. 7R / JCT | 220 | 35 | 200 | 150 |  |\n| 5 | 21PF / TSB | 220 | 35 | 180 | 65 |  |\n| 6 | 21PF / LG | 230 | 35 | 230 | 65 |  |\n| 7 | 21PF / SDI | 220 | 35 | 210 | 65 |  |\n| 8 | 25PF / SDI | 210 | 35 | 160 | 120 |  |\n| 9 | 29” 1. 3R / SDI | 200 | 35 | 170 | 150 |  |\n\n5. Turn the SCREEN VR until “MRCR G B” and “MRWDG” are green and those value are about 100.(The incorrect SCREEN Voltage may result that “MRCR G B” and “MRWDG” should be red)  \nAlignment and Adjustments  \n4-6 E2PROM (IC902) Replacement  \n1. When IC902 is replaced, all adjustment data revert to the initial values. So, all ad","cbCairMcv0n8uy5L","https://ap.wps.com/l/cbCairMcv0n8uy5L","pdf",131273,22,"English","# 4-1 General Alignment Instructions\n# 4-2 Automatic Degaussing\n# 4-3 High Voltage Check\n# 4-4 FOCUS Adjustment\n# 4-5 SCREEN Adjustment\n# 4-6 E2PROM (IC902) Replacement\n# 4-7 White Balance Adjustment","[{\"question\":\"What initial checks should be done before detailed TV alignment?\",\"answer\":\"Verify basic picture characteristics such as height, horizontal and vertical sync, and focus. Check for good black-and-white details and address any objectionable color shading as described in the following degaussing and adjustment procedures.\"},{\"question\":\"How does the automatic degaussing process work and what if color shading remains?\",\"answer\":\"A degaussing coil operates for about one second after power is switched ON. If the TV is moved or turned differently, power should be OFF for at least 10 minutes; if shading persists, perform Color purity and Convergence adjustments or use an external degaussing coil by slowly moving it around the picture tube faceplate and cabinet sides, then withdrawing and powering off.\"},{\"question\":\"What is required after replacing E2PROM (IC902)?\",\"answer\":\"After IC902 is replaced, all adjustment data revert to initial values, so all adjustment values must be readjusted during servicing. Then connect AC power, turn the TV on, and warm up in standby before proceeding with power-on adjustments.\"}]","Alignment and Adjustments - Section 4 - TV Color Tuning and Purity Procedures | PDF",1791805157,55]