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<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">9）796FDⅡ <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42.15pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">开机绿灯亮，无高压，绿灯橙灯交替亮。<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 94.5pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: -94.5pt; mso-char-indent-count: -9.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span><b>分析：</b>高压包供电降压管Q402→J512击穿，R436（22Ω）也坏，行推动，变压器供电。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">10）796FD <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: -52.5pt; mso-char-indent-count: -4.98; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">插电源后绿灯长亮，无图像，无高压，<span lang="EN-US">power键无法控制，开机关机绿灯长亮不灭。 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: -31.6pt; mso-char-indent-count: -3.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">分析：</span></b><span style="FONT-FAMILY: 宋体;">查各种易损件都没烧，尾板问题，引起<span lang="EN-US">power灯长亮不灭，尾板C456坏引起，同时也要查一下同步插排进来的HS VS贴片件可能引起故障。 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 94.5pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: -94.5pt; mso-char-indent-count: -9.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span><b>小经验：</b>开机烧行管，请注意逆程电容解压管J512（Q109）易坏，同时注意R144（22Ω）电阻。XJ770 机型EEPROM重刷时，注意显像管型号有日立和东芝之分，不同厂家的管子，对应不同EEPROM。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">11）770PF <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42.15pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">开机一会儿行宽失调<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 63.25pt; mso-char-indent-count: 6.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">分析：</span></b><span lang="EN-US" style="FONT-FAMILY: 宋体;">D410下阻尼管不良，或虚焊，Q417,Q301,C130易虚焊。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 62.5pt; mso-char-indent-count: 5.93; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">注意：</span></b><span lang="EN-US" style="FONT-FAMILY: 宋体;">EEPROM重刷时，机型+年份+显像管型号 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt; tab-stops: 28.0pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">12）796FDⅡ <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42.15pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt; tab-stops: 28.0pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">开机后，绿灯橙灯交替亮，无高压，无图像。<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 63.25pt; mso-char-indent-count: 6.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">分析：</span></b><span style="FONT-FAMILY: 宋体;">高压包一路降压管<span lang="EN-US">Q402，J512击穿。 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">13）770AG EMC电板（新款） <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 44.9pt; mso-char-indent-count: 4.26; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">下部三分之一处一条亮线（<span lang="EN-US">TDA8172） <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: -31.6pt; mso-char-indent-count: -3.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">分析：</span></b><span style="FONT-FAMILY: 宋体;">查<span lang="EN-US">TDA8172各脚电压，②为－35V，正常12V，限流电阻坏，更换后又烧，更换TDA8172和电阻后OK。 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span><b><span style="mso-spacerun: yes;"> </span>注意：</b>A∷(PV)<span style="mso-spacerun: yes;"> </span>开机拔下电源，按A+PW键插电源 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;">(14)786FT <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42.15pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象<span lang="EN-US">:</span></span></b><span style="FONT-FAMILY: 宋体;">上部图像压缩干扰<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span><b><span style="mso-spacerun: yes;"> </span>分析：</b>场块供电的12V滤波漏电。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">15）810FT <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42.15pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">开机图像特别亮，且有器扫线<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span><b>分析：</b>该机特点，尾板屏蔽散热片接地，不接地会造成高亮度。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">（<span lang="EN-US">16）796FDⅡ <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;">A、2000年生产的 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">① 线圈虚焊引起<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;">a、开机吱吱叫，不起振，无高压，无图像，有时开机好使，有时不好使，如不及时修，易造成炸电源 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;">b、炸电源易损件保险丝、二极管D125、D124型号IN4002、ZD101稳压管可不装；还有开关管（S71KM、K2966、7460）、0.33Ω电阻、VC3842等。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span style="FONT-FAMILY: 宋体;">② <span lang="EN-US">C356，221K/2KV电容：图像从大往小缩，800*600切1024*768时，显示器突然无图像，不显示，并伴有叫声。 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">③ <span lang="EN-US">R346,22Ω行推动供电电阻。 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42.05pt; mso-char-indent-count: 3.99; mso-char-indent-size: 10.5pt;"><b><span style="FONT-FAMILY: 宋体;">故障现象：</span></b><span style="FONT-FAMILY: 宋体;">电源灯亮，无高压，不起振<span lang="EN-US"><br/> <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">④ <span lang="EN-US">R462, (0.39Ω)<span style="mso-spacerun: yes;"> </span>故障现象：图像往小缩吱吱叫 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">⑤：<span lang="EN-US">EEPROM坏<span style="mso-spacerun: yes;"> </span>调亮度，菜单亮度变 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;">B、2003年生产 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">① <span lang="EN-US">3842坏(1)灯不亮<span style="mso-spacerun: yes;"> </span>（2）叫声 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">② <span lang="EN-US">R346（1）灯亮无高压 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 42pt; mso-char-indent-count: 4.0; mso-char-indent-size: 10.5pt;"><span style="FONT-FAMILY: 宋体;">③ <span lang="EN-US">EEPROM调亮度大时有黑框 <p></p></span></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;">C、2004年6月分生产 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span><span style="mso-spacerun: yes;"> </span>① 故障：炸机，烧保险 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 115.5pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: -115.5pt; mso-char-indent-count: -11.0; mso-char-indent-size: 10.5pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span>检修：保险D125,D124如不正常，换VC3842，本故障由于电源继电器，电感虚焊引起。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span>② 故障：开机吱吱叫，开关变压器次级线圈RL104虚焊引起。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span>③ 灯亮，无高压，（一）R346坏<span style="mso-spacerun: yes;"> </span>（二）降压QJ449<span style="mso-spacerun: yes;"> </span>行管C5411<span style="mso-spacerun: yes;"> </span>电阻10Ω/2W。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><span style="mso-spacerun: yes;"> </span>④ EEPROM坏<span style="mso-spacerun: yes;"> </span>故障：菜单亮度随亮度调节一起变。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 26.25pt;"><b><span style="FONT-FAMILY: 宋体;">注意：</span></b><span lang="EN-US" style="FONT-FAMILY: 宋体;">2002年和2003年的机器不一样。 <p></p></span></p><p></p><p></p><p></p><p></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 26.25pt;"><span lang="EN-US" style="FONT-FAMILY: 宋体;"><p></p></span></p><p></p><p></p><p></p><p><font color="#ff0000">好帖子写的不错，加入精华 by rooe</font></p>( {& k: c. a- [( j. m
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