User Guide

NSD-5
10. Troubleshooting PAMS Technical Documentation
Page 6 Nokia Corporation Issue 1 05/02
2. RF Regulators (VR1–VR7)
VR1 through VR6 are referred to as the RF regulators. Most are switchable, and all should
be within 2.67 – 2.85V when they are on (2.8V nominal). VR1 and VR6 are always on dur-
ing CCONT’s power on mode. The rest of the regulators are switchable and are normally
on during one or more of the various phone states, but may be turned on at any time
with the service software in order to verify their output. The RF regulators can be
checked at the following test points.
a) VR1 – TPD
b) VR1_SW – TPD
c) VR2 – TPD
d) VR3 – TPD
e) VR4 – TPD
f) VR5 – TPD
g) VR6 – TPD
h) VR7 - TPD
3. V2V (VMAD)
The V2V (VMAD) regulator is intended to power the MAD4 ASIC core. The output is
adjustable from 1.3V to 2.65V in 0.225V steps, and is used with MAD4 ver 3 (but not
MAD4 ver 2). The output at V2V, when MAD4 ver 3 is mounted, should be 1.750V ±5%
and can be checked at TPD27.
Switch mode regulator
1. V5V (+5V_POWER)
V5V is a 5V switch mode regulator, which always remains on during CCONT power on
mode. Valid voltages are 4.8V to 5.2V, and it can be checked at TPD2.
2. VSIM (3V_5V)
VSIM is powered by the same switch mode regulator as V5V; however, it is switchable
between 3V and 5V. The phone uses VSIM as the 3V FLASH programming voltage, so it
should remain off unless the phone is being flashed. Valid voltages are 2.8V to 3.2V, and
it can be checked at TPD1.
A/D Conversion
CCONT contains a 10–bit A/D converter that is multiplexed between eight different
inputs. They are used mainly for battery and charger monitoring. The eight inputs are:
Vbat (battery voltage), ICHAR (charger current), VCHAR (charger voltage), BSI (battery
type), BTEMP (battery temperature), VCXOTEMP (PA temperature), and EAD (accessory