Nokia 6150 - Page 6

CONFIDENTIAL
Service & Analysis Center Europe
Training Team
version 1.0 / 19.10.1999 Page 6 of 41
N501 / N502 short circuit
• If there is a short circuit on VBATT, lift L560 and check again
• If the current is OK one of the two PA are faulty
• Assemble L560 back and lift L654 and pin 12 and 13 from N502
• If the current are OK N502 are faulty, if not N501 are faulty
• If the PCB is burnt, swap the phone
C680; C682 / short circuit
• Lift the capacitor and check again
Figure 2: Block diagram of switching on routine
BB Regulator VBB 2.8V
12, 16, ...
60
63
25 VXO 2.8V
55
46
47
29
54
48
24
CCONT
N100
VBATT
R103 / R104
VCHAR
BTEMP
SLEEPX
GENSIO
32 KHz
square
PURX
R118
B100
32 KHz
Crystal
Pwr OnX
from
UI module
113
2.8V
124
122
2.8V
93
MAD2
D200
R213
C213
VCXO
13 MHz
G600