Battery Drains Fast Troubleshooting; Power Key And System Power-Up - Nokia RM-555 Service Manual

RM-555
System Module and User Interface
Voltage
Vmstr+
Vmstr-
Sw shutdown
Sw shutdown
Vcoff+
Vcoff-

Battery drains fast troubleshooting

Use case
Video call
Video streaming HSDPA QVGA
Mpeg4 30fps BT hs
Video recording 640x352 30fps
Video playback 640x352 30fps
WCDMA voice call

Power key and system power-up

When the battery is placed in the phone the power key circuits are energized. When the power key is pressed,
the system boots up (if an adequate battery voltage is present).
Power down can be initiated by pressing the power key again (the system is powered down with the aid of
SW). The power key is connected to EM ASIC N2200 (AVILMA) via PWRONX signal.
The power key may be disabled in certain charging cases.
Issue 1
Voltage [V]
HW Shutdown Voltages
2.1 ± 0.1
1.9 ± 0.1
SW Shutdown Voltages
3.15
3.3
Min Operating Voltage
2.9 ± 0.1
2.6 ± 0.1
Table 11 Average current consumption
Current
consumption
540mA
510mA
400mA
340mA
250mA
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Condition
Off to on
On to off
In call
In idle
Off to on
On to off
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