PHILIPS BRILLIANCE 16扫描中出现扫描中止

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                    <p><p><img src="image/20201019/1bd08b695d5fd805cb63ee05a2610294_1.jpg" /></p></p><p><span>一，故障现象：</span></p><p><span>扫描中出现扫描中止，扫描架转速很慢,偶尔供不上电，偶尔出现刹车片不能吸合现象。见下图：</span></p><p><p><img src="image/20201019/a3d8a22be302b8ee87881ea59780915a_2.jpg" /></p></p><p><span></span><br  /></p><p><br  /></p><p><span>二，查看错误日志：</span></p><p><span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;ERROR_STRING&nbsp;:&nbsp;&nbsp;S_RMC_SB_FAULT</span></p><p><span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Explanation &nbsp;:&nbsp;&nbsp;&nbsp;Fault&nbsp;&nbsp;from&nbsp;&nbsp;the&nbsp;&nbsp;SB.&nbsp;&nbsp;Causes&nbsp;&nbsp;the&nbsp;&nbsp;MDP&nbsp;&nbsp;to&nbsp;&nbsp;the&nbsp;&nbsp;main&nbsp;&nbsp;Drive&nbsp;&nbsp;Contactor.&nbsp;When&nbsp;&nbsp;Estop&nbsp;&nbsp;is&nbsp;&nbsp;Closed,&nbsp;the&nbsp;&nbsp;Ghost&nbsp;&nbsp;searches&nbsp;&nbsp;the&nbsp;&nbsp;SpindleBlok&nbsp;&nbsp;for&nbsp;&nbsp;the&nbsp;&nbsp;error&nbsp;&nbsp;cause&nbsp;&nbsp;of&nbsp;&nbsp;the&nbsp;&nbsp;Hangup;&nbsp;(usually&nbsp;&nbsp;it&nbsp;&nbsp;would&nbsp;&nbsp;be&nbsp;&nbsp;a&nbsp;&nbsp;UnderVoltage)and&nbsp;&nbsp;sends&nbsp;&nbsp;a&nbsp;&nbsp;message&nbsp;&nbsp;just&nbsp;&nbsp;for&nbsp;&nbsp;info.</span></p><p><span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Action &nbsp; &nbsp; &nbsp; : &nbsp; Check&nbsp;&nbsp;the&nbsp;&nbsp;SB&nbsp;</span></p><p><span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;reCommission&nbsp;&nbsp;the&nbsp;&nbsp;SB&nbsp;&nbsp;if&nbsp;&nbsp;the&nbsp;&nbsp;problem&nbsp;&nbsp;is&nbsp;&nbsp;too&nbsp;&nbsp;frequent.</span></p><p><span>三，故障分析：</span></p><p><span>&nbsp; &nbsp; &nbsp;扫描不到位，扫描架转速很慢主要跟电动机、SB有关，也与扫描过程中刹车片吸合不上有关系。错误日志报SB问题所以重点怀疑SB出现故障。见下图：</span></p><p><span>Main Drive Components</span></p><p><br  /></p><p><span>1.Motor 2.Poly V Sheave 3.Drive Belt + Tensioner 4.Motor Controller 5.EMI Line Filter&nbsp;</span></p><p><span>四，故障解决：</span></p><p><span>1，用棉签沾酒精清理光耦、滑环、碳刷。见下图：</span></p><p><p><img src="image/20201019/e815e4a5592a5420ed57ffb68ab45b8a_3.jpg" /></p></p><p><span></span></p><p><p><img src="image/20201019/95bf38e447ca8a7b64c13664429d7e90_4.jpg" /></p></p><p><br  /></p><p><span>2，打开CT前盖检查刹车片发现其吸合部分空间太大，空扫供电时会偶尔出现继电器不能吸合现象从而导致抱死使扫描架不能旋转。解决刹车片问题，扫描还是没有改善。见如图&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span></p><p><br  /></p><p><span>3，用万用表HZ挡检查R2D频率，测值为8.2KHZ大于8KHZ属于正常范围。见下图（空间很小测时一定注意一端接cos-/sin-另一端接ADNG，防止接错短路烧坏。）</span></p><p><br  /></p><p><span>4，打开CT后盖做空扫注意观察电动机转速是否正常有没有不转现象。经检测电动机各项参数都没问题在系统后台做旋转测试发现SB不能匹配，测试一半中止，怀疑SB问题。见下图：</span></p><p><br  /></p><p><span>5，更换SB故障排除.(装新的SB时接线最好从下面往上接，注意有2根线在一个螺丝里的一定要上紧螺丝防止有线滑出。）</span></p><p><span></span></p><p><p><img src="image/20201019/c946b89f5f6d2d6737d0ad8e1129026a_5.jpg" /></p></p><p><span></span><br  /></p><p><span><br  /></span></p><p><span></span></p><p><p><img src="image/20201019/7822a4e2249e86a45760fbbfc1675e38_6.gif" /></p></p><p><span></span><br  /></p><p><span>&nbsp;</span></p><p><span>&nbsp;</span></p><p><br  /></p>