Electrical power supply - general: Pcm

The PCM reverts to the Code function when the battery is disconnected and is thus no longer ready for operation.
When the power supply is disconnected, the built-in GPS receiver loses the so-called almanac containing the satellite orbital paths.
The date and time are no longer shown on the display after the power supply is disconnected.
If the telephone card was inserted and the telephone was ready for operation, the telephone is subsequently disabled.