Nokia 2600 服务手册
RH-59/60
Nokia Customer Care
12
COMPANY CONFIDENTIAL
ISSUE 1 09/2004
Copyright © 2004 Nokia. All Rights Reserved.
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The phone do not register to the network, or the phone cannot make a call
If the phone doesn't register to the network, the fault can be in either BB or RF. Only few signals
can be tested since several signals is 'burried' in one or more of the inner layers of the PWB.
can be tested since several signals is 'burried' in one or more of the inner layers of the PWB.
First of all check that SIM LOCK is not causing the error by using a Test-SIM card and connect
the phone to a tester.
the phone to a tester.
Figure 5:No call troubleshooting
Phone do not register to
network
or phone cannot make a call
C230, C231
Voltage = ~1,35VDC
All during GSM frame (call mode)
Use TXP on C646 as trigger
Check :
C222,C223, C224, C225,
C226, C227, PW B.
Else defective D200 or D400*
J421, J422, J423
Check RF serial bus during
GSM-frame :
Logic HIGH = 1,8VDC
Logic LOW = 0VDC
RFBUSCLK (J421),
RFBUSDA (J422),
RFBUSEN1X (J423)
C222, C223, C224, C225,
C226, C227
Voltage = ~2,78VDC
All during GSM frame-
call mode.
Use TXP on C646 as trigger
No
Yes
Check :
PW B.
Else defective D200*
or D400*
Check :
PW B.
Else defective D200*
or D400*
Check :
C230, C231, PW B.
Else defective
D200* or D400*
Yes
No
No
R610, R611
Check analog signals during
GSM-frame (TX slot):
TXIP/N (R610) = 1-1,75VDC
TXQP/N (R611) = 1-1,75VDC
R601, R603
Check analog signals during
GSM-frame (RX slot):
RXIP/N (R601) = 0-1,45VDC
RXQP/N (R603) = 0-1,45VDC
Yes
Yes
No
Check :
R610, R611,PW B.
Else defective D200*
or D400*
No
Check RF
Yes