Nokia RH-66 Troubleshooting Manual page 12

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
The heart of the power distribution is the power control block inside the UEMC. It
includes all the voltage regulators and feeds the power to the entire system. The UEMC
handles hardware power-up functions so the regulators are not powered and the power
up reset (PURX) is not released if the battery voltage is less than 3 V.
The baseband is powered from the following UEMC regulators:
Maximum
Regulator
Current (mA)
VCORE 300
VIO 150
VFLASH1 70
VFLASH2 40
VANA 80
VSIM 25
Table 2 includes the UEMC regulators for the RF.
Regulator
VR1A
VR1B
VR2
VR3
VR4
VR5
VR6
VR7
The charge pump that is used by VR1A is constructed around the UEMC. The charge
pump works with the CBUS oscillator (1.2 MHz) and gives a 4.75 V regulated output
voltage to the RF.
Page 12
Table 1: Baseband Regulators
Vout (V)
1.35/1.05
1.8
2.78
2.78
2.78
3.0
Table 2: RF Regulators
Maximum
Vout (V)
Current (mA)
10 4.75
10 4.75
100 2.78
20 2.78
50 2.78
50 2.78
50 2.78
45 2.78
©2005 Nokia Corporation
Notes
Power up default 1.35V and 1.05V in sleep
mode.
Enabled always except during power-off mode
Enabled always except during power-off mode
Enabled only when data cable is connected
Enabled only when the system is awake (Off
during sleep and power-off modes)
Enabled only when SIM card is used
Notes
Enabled when cell transmitter is on
Enabled when the transmitter is on
Enabled when the transmitter is on
Enabled when SleepX is high
Enabled when the receiver is on
Enabled when the receiver is on
Enabled when the transmitter is on
Enabled when the receiver is on
Company Confidential Issue 1 03/2005