Siemens SL 10 Service Manual

Also see for SL10: User guide Service manual Operating instructions Operating instructions Repair documentation

Contents

Private Communication SystemsMobile PhonesService Manual SL10 V1.1 PN MP STR. Fleurensm_sl10_lvl2_v11.doc Page 17 of 22 05/98The ASIC also checks the presence of the watchdog signal from the μP and provides theswitching on-functionality (ON/OFF button or timer signal).The 2.8V power supply of TCXO, Receiver and Modulator is derived directly from thebattery voltage by a separate linear regulator.During testing ist is advisable to use the service adapter, connected to a power supplydelivering +4V, max 3A. Make sure that you connect the service adapter with the rightpolarity, the red plug to +4V and the blue plug to ground.CAUTION!If you use a voltage higher than +7V, or with wrong polarity, the phone can be destroyed!5.4 Limits of Voltage and Currenta) Battery Voltage:If the battery voltages rises above 6.2 Volts, the phone will switch off and it cannot beswitched on again before the voltage is lower than 6.2 Volts.If the battery voltage rises above 7 Volts the phone can be destroyed.b) Charging Current:The charging current must not rise above 1 A or the phone (fuse) will be inoperable. Be careful with foreign accessories or chargers! Make sure that the charging current is limited to a value below 1A!