Nokia 3210 Service & Repair Manual
Also see for 3210: User guideRepair guideUser guideUser guideManual
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Contents
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CONFIDENTIAL Service & Analysis Center EuropeTraining Teamversion 1.0 / 05.11.1999 Page 13 of 37Phone switch it self offC136 10μF/10V• Check, if the handset doesn't switch off with 3V SIM-Cards• Check that the 5V VSIM voltage on the capacitor C136 is approximately 4,8V-5,2V withmaximal 350mVpp noise overlap (view the diagram below)Phone intermittend switches offCheck if this happensonly with 5V SIM-cardsand if the phone worksprobably with 3V SIM'sChange C131 if thenoise is higher than350mVppCheck X101 and X102,if poor soldered, bentor soiledCheck amplitude of32,768KHz squarewave at C149Check amplitude of13MHzRF Clk C301 (2,8Vpp)Check VBB 2,8V DConC117Resolder, change orclean the connectorChange or checksoldering of B100,C147, C148, C153,N100Change or checksoldering of G701,V702...Change or checksoldering of N100,C117not oKnot oKCheck the 5Vsupply voltage onC136 with anoscilloscopeoKnot oKnot oKoKoKnot oKoKnot oK |
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