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Customer Care Europe, Middle East & Africa
SCCE Training Group
No RX calibration GSM 900 possible
Flowchart 12-2
Check C593/547 or
nOK
change Z501/502
Check/change
nOK
V501/N500
Check/change T500,
nOK
C507/515, Z500
Check
RXIQ-signals at
R504
OK
© NMP 2002
GSM1800
OK
Check
1842.8 MHz at
C510
OK
Check
1842.8 MHz at
C519
OK
Check
1842.8 MHz at
L500
OK
VTCXO 2.7 VDC at C506/518; VSYNTE 2.7 VDC at C501/504;
VRXRF 2.8 VDC at C500/503; VCHP 4.7 VDC at C505;
VREF_2 1.35 VDC at C535/536; RXREF 1.2 VDC at C529,
nOK
SDATA at R300; SCLK/SENA at R301; HAGARRESET at C540
Check SHF-oscillator at T502 pin 3/4 (GSM 900 RX Ch.38: 3770.4
MHz, GSM1800 RX Ch.700: 3685.6 MHz)
If signals are ok but no RX-signal is measurable at R504, change
Check VBB 2.8 VDC at C119,
check VCOBBA 2.8 V at C116/117,
check VREF 1.5 VDC at C109
If values are ok change COBBA
CONFIDENTIAL
NHM—2/5/6
3410
Date 20.11.2002
No RX-calibration
possible
Use WinTesla to set phone
into RX-burstmode
GSM 900 Ch.38 /
GSM 1800 Ch.700
Set RF-generator to a high
RF-level output
Check
26 MHz REFCLK at
OK
C546, -10 dBm,
frequency deviation
<100 Hz
nOK
Check Vtcxo 2.6 VDC at C543/544,
also check AFC-voltage at C552,
normally 1.2 VDC. Change G502 if
frequency deviation is > 100 Hz
Check signals for HAGAR N500:
HAGAR N500
and COBBACLK at J317.
Checked by:
Customer Care E&A
Repairhints
Version 4.0 Approved
GSM900
Check
Check C593/556 or
942.6 MHz at
nOK
change Z501/502
C545
OK
Check
Check/change
942.6 MHz at
nOK
C534
OK
Check
Check/change T501,
942.6 MHz at
nOK
C520/528, Z500
L504
OK
Check
nOK
RXIQ-signals
at R504
Approved by:
SCCE Training Group
39 (44)
V501/N500
OK
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