Nokia 6020b Service Manual
Issue 1 03/2005
COMPANY CONFIDENTIAL
31
Copyright © 2005 Nokia. All Rights Reserved.
RM-31
7 - System Module
7 - System Module
Nokia Customer Care
Figure 11:Illumination
Test possibility
Phoenix LED test
For troubleshooting see Display faults in Baseband Troubleshooting Instructions.
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SIM
The whole SIM interface locates in UPP and UEMEK.
The interface part in the UEMEK contains power up/down, port gating, card detect, data receiv-
ing, ATR-counter, registers and level shifting buffers logic. The SIM interface is the electrical
interface between the Subscriber Identity Module Card (SIM Card) and mobile phone (via
UEMEK device).
ing, ATR-counter, registers and level shifting buffers logic. The SIM interface is the electrical
interface between the Subscriber Identity Module Card (SIM Card) and mobile phone (via
UEMEK device).
Both 3V and 1.8V SIM cards are supported. A register in the UEMEK selects SIM supply volt-
age. It is only allowed to change the SIM supply voltage when the SIM IF is powered down.
age. It is only allowed to change the SIM supply voltage when the SIM IF is powered down.
VBAT
DC/DC-Converter
EN
VLED+
VLED-
Vin
GEN I/O 19
LCD Backlight
DLIGHT
Keybord light
UEME