NOKIA NSE5-012 free download

File name NSE5-012.PDF

CONFIDENTIAL 1 (3) Nokia Mobile Phones Service Bulletin No. SB-012/18.02.00 Technical Support, Europe & Africa NSE-5 ROLLER KEY In some cases the Roller Key on NSE-5 has not worked. This can be caused by the following: 1. Guide pin on B-cover is too long The right holder of the RTC-battery (see picture below), which is a component of the B-cover, pushes against R411 on the PCB. Due to these forces the solder breaks (in addition to this it is possible that R411 could break itself) and then the connection is open. Due to this the roller key does not work. NSE-5 SB-012 CONFIDENTIAL 2 (3) Procedure how to fix the malfunction The right guide pin must be cut manually with a tool as indicated on picture below. (A similar tool can also be used.) The nominal height of the guide pin after cutting must be 1.4mm. Please remember to cut only the right guide pin (see picture below)!! NSE-5 SB-012 CONFIDENTIAL 3 (3) 2. The ESD & Connector Spring The lower limit for the ESD spring is 1.5mm and the upper limit is 1.8mm. If the spring is outside this specification, (i.e. the spring does not have the proper contact to the PCB) the Roller Key will not function. Procedure how to fix the above Change the A-cover NSE-5 SB-012