User Guide

NSD-5
10. Troubleshooting PAMS Technical Documentation
Page 20 Nokia Corporation Issue 1 05/02
28 Vref CCONT regulator output (typical 1.244V) From CCONT to CAFE and battery I/
F
29 CRB 32.768KHz From 32K crystal to CCONT
30 Vbb Baseband supply voltage (2.8V typical) From CCONT to MAD4 and memo-
ries
31 VR3 CCONT regulator output 2(typical 2.8V) From CCONT to RF receiver
32 VR4 CCONT regulator output 2(typical 2.8V) From CCONT to RF transmitter
33 VR2 CCONT regulator output 2(typical 2.8V) From CCONT to RF receiver
34 VR5 CCONT regulator output 2(typical 2.8V) From CCONT to RF transmitter
35 VR6 CCONT regulator output 2(typical 2.8V) From CCONT to CAFE
36 VR1 CCONT regulator output 2(typical 2.8V) From CCONT to 19.2MHz VCTCXO
37 VR1_SW 2.75V (MIC bias) From CCONT to V201 to CAFE
38 Vbat Battery voltage (3.2-4.2V)
(3.1-5.2V with charger connected)
From battery to CCONT and other
various parts of the phone
39 L_GND 0V From bottom connector through an
inductor to phone ground
40 V_IN Charger input (ACP-8:6V, LCH-9:8.3V
typical)
From bottom connector to CHAPS
41 MICP Mic differential positive signal From bottom connector to CAFE
internal microphone input
42 MICN Mic differential negative signal From bottom connector to CAFE
internal microphone input
43 EAD_HEADINT Headset interrupt signal From bottom connector to MAD4
44 XEAR External ear output From CAFE to bottom connector
45 XMICN Mic external signal From bottom connector to CAFE
external microphone input
46 XMICP Mic external signal From bottom connector to CAFE
external microphone input
47 VR7 CCONT regulator output 2(typical 2.8V) From CCONT to RF transmitter
Test
point
Signal name General characteristics General signal destination