Nokia NPE-4 - Page 12

CONFIDENTIAL 12 (25)
NPE-4 6310/NPL-1 6310i Repairhints
Customer Care Europe & Africa Version 1.0 Approved
SCCE Training Group Date 15.08.2002
© NMP 2002
Checked by:
SCCE Training Group
Approved by:
SCCE
Flowchart - No service →
→→
→ no RX
No Service /
No RSSI
Set Phone to RX-Burst-Mode.
Set RF Generator to Ch. 37,
RX-level -55 dBm
Set Spectrum Analyzer to
RX EGSM 942.4 MHz,
.
Check
RX I/Q-Signal 67.71 kHz
,Vpp=1.1V at C721 (set
oscilloscope to DC-Mode)
500 mV, Time base
1 ms.
Check
Dtos 67.71 kHz
at C714.
Check
RX-Signal 942.4 MHz,
at L626
Check
Sys CLK 26 MHz
Vpp = 800 mV at
C752
Check
following voltages:
VR3 = 2.8 VDC at C602; VR1A = 4.7 VDC
at C600; VR4 = 2.8 VDC at C601;
VR5 = 2.8 VDC at C604; VR6 = 2.8 VDC
at C605; VR7 =2.8 VDC at R630;
VREFRF01 & VREFRF02
= 1.35 V at R726
Change N600
Hagar
Check D200
UEM
Check G740 26 MHz
oscillator circuit
Check
PCN RX-Signal
1842.4 MHz, Ch. 700,
at L616
Check RX-line to X102
antenna connector for
shorts or disconnections
Check
CP_F I/Q (BIQUAD)
67.71 kHz
at C714
Check
C714 for cold or
broken
solderings.
Change N600
Hagar
Change C714
Check
following voltages :
VR4 = 2.8 VDC at C601;
VR6 = 2.8 VDC
at C605
OK
nOK
nOK
OK
OK
OK
OK
nOK
nOK
OK
nOK
nOK
nOK
nOK
Check D200
UEM
Change N600
Hagar
nOK
OK
OK
OK