DSQC545A示教器模块
印刷电路板清洁本节中有几个电路板清洁程序。这些程序包括电路板清洁和清洗、边缘连接器的清洁和边缘连接器之间的电路板层压。使用符合每个电路板需要的程序。清除电路板上的所有灰尘、污垢、油、腐蚀或任何其他污染物。在静电安全工作站对印刷电路板进行所有清洁和处理。处理印刷电路板时，务必遵守本说明第3节“特殊处理”下的步骤。一般清洁和清洗如果印刷电路板需要轻微清洁：使用清洁、干燥、过滤的压缩空气或防静电现场服务真空吸尘器清除印刷电路板表面的灰尘和残留物。清洗印刷电路板的另一种方法是：1.用异丙醇（99.5%电子级）喷涂印刷电路板，或用用异丙基醇润湿的泡沫棉签擦拭电路板。2.当电路板清洁时，使用压缩空气将多余的溶剂吹出电路板。维修程序仅限于模块更换。如果INFI-NET到计算机接口模块出现故障，请将其卸下并更换为另一个。确认更换模块的双列直插开关和跳线设置与故障模块的设置相同。注：除非按下停止（INICT01）或停止/复位（INICT3）按钮，且模块操作已停止，否则请勿移除通电的INICT03和INICT02模块。
边缘连接器清洁
清洁边缘连接器触点：1.使用80%异丙醇（99.5%电子级）和20%蒸馏水的溶剂混合物。2.用溶剂混合物浸泡无绒布。3.平行于边缘连接器触点来回操作布。4.用浸有溶剂混合物的干净布重复上述步骤。5.用干净的无绒布擦干边缘连接器接触区域。要清洁变色或严重污渍的边缘连接器触点：1.使用Eberhard Faber（400A）粉色珍珠橡皮擦或同等产品去除变色或污渍。也可使用玻璃纤维或尼龙抛光刷。2.抛光过程中使用80/20异丙醇和水溶液将静电放电降至最低。3.打磨时不要用力过大。仅使用足够的力来照亮接触面。清洁后检查边缘连接器，以确保接触面无损失。检查机柜内的所有信号接线、电源和接地连接，以验证其完整性。检查连接时，请始终按仅拧紧的方向转动螺钉、螺母或其他紧固装置。如果连接松动，则将其拧紧。如果连接牢固，拧紧操作将验证其是否牢固。不得进行任何松动连接的动作。执行此预防性维护任务时，必须关闭机柜电源。
Printed Circuit Board Cleaning
There are several circuit board cleaning procedures in this section. These procedures cover circuit board cleaning and washing, cleaning edge connectors and circuit board laminate between edge connectors. Use the procedures that meet the needs of each circuit board. Remove all dust, dirt, oil, corrosion or any other contaminant from the circuit board.Do all cleaning and handling of the printed circuit boards at static safe work stations. Always observe the steps under SPECIAL HANDLING in Section 3 of this instruction when handling printed circuit boards. GENERAL CLEANING AND WASHING If the printed circuit board needs minor cleaning: Remove dust and residue from the printed circuit board surface using clean, dry, filtered compressed air or an antistatic field service vacuum cleaner. Another method of washing the printed circuit board is: 1. Clean the printed circuit board by spraying it with isopropyl alcohol (99.5% electronic grade) or wiping the board with a foam tipped swab wetted in isopropyl alcohol. 2. When the circuit board is clean, remove excess solvent by using compressed air to blow it free of the circuit board.Repair procedures are limited to module replacement. If an INFI-NET to computer interface module fails, remove and replace it with another. Verify that the replacement module dipswitch and jumper settings are the same as those of the failed module. NOTE: Do not remove INICT01 and INICT03 modules under power unless the stop (INICT01) or stop/reset (INICT03) pushbutton has been depressed and module operation has been halted.
EDGE CONNECTOR CLEANING
To clean edge connector contacts: 1. Use a solvent mixture of 80% isopropyl alcohol (99.5% electronic grade) and 20% distilled water. 2. Soak a lint free cloth with the solvent mixture. 3. Work the cloth back and forth parallel to the edge connector contacts. 4. Repeat with a clean cloth that is soaked with the solvent mixture. 5. Dry the edge connector contact area by wiping with a clean lint-free cloth. To clean tarnished or deeply stained edge connector contacts: 1. Use an Eberhard Faber (400A) pink pearl eraser, or equivalent to remove tarnish or stains. Fiberglass or nylon burnishing brushes may be used also. 2. Minimize electrostatic discharge by using the 80/20 isopropyl alcohol and water solution during burnishing. 3. Do not use excessive force while burnishing. Use only enough force to shine the contact surface. Inspect the edge connector after cleaning to assure no loss of contact surface.Check all signal wiring, power and ground connections within the cabinet to verify their integrity. When checking connections, always turn a screw, nut or other fastening device in the direction to tighten only. If the connection is loose, it will be tightened. If the connection is tight, the tightening action will verify that it is secure. There must not be any motion done to loosen the connection.Power to the cabinet must be off while performing this preventive maintenance task.
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