Nokia 3210 Repair Manual page 38

Customer Care Europe & Africa
Technical Services Training Group
RF PART FAILURES
In case of any fault you suppose in the RF part of your phone: Try to calibrate RX/TX-values first to define the fault.
Refer to spectrum samples on page#46
Low receiver signal strength indicator – Antenna faulty
Check the fixed position of the antenna – do not touch the conductive area with bare fingers!
Check spring connector X501 – change if spring contacts are bent (the GND spring will always look bend down a bit)
Check the indicator level with a new antenna.
No service or long time to get network coverage
Check sleepclock frequency 32.768kHz at B100 – change B100 if frequency does not fit
(see also chapter "Phone does not switch on – B100 faulty")
Z501 faulty (low RX Quality / GSM1800)
If RX calibration fails – see RF part faults in previous chapter
If RX calibration works or in some cases the low reference level cannot be set – check if Z501 bent
Change Z501 if necessary
No service failures summary
At first set the RF-Generator to a high RF-level output: e.g. –40dBm
Use WinTesla to set the phone in the following mode:
G701 – VCTCXO faulty
Check 13MHz reference frequency at SUMMA N700, pin 15 – frequency error ± 50Hz / 900mVpp
(see also chapter "Phone does not switch on – G701 faulty")
If all voltages ok and no frequency deviation is realized, but intermittent call interrupts occuring over and over again - it is also
possible that G701 has a not detectable internal failure – so change G701 if the phone has those intermittent call problems.
N600 CRFU faulty / Z600 faulty: "failed to set high reference ..."
Check the incoming RF-frequency (e.g. GSM/CH60: 947MHz) at N600, pin 27
Check LNA_AGC (FRACTRL) at N600, pin 28: 2.8VDC
Check VRX_1 at N600, pin 33, 38, 45, 46 : 2.8VDC
Check LNA_OUT 2.3VDC at N600, pin 23 and output of Z600 (attenuation in/out ~15dBm) at N600, pin 18, 19
(In some cases it could be possible that Z600 shorts LNA_OUT)
Check UHF LO frequency (GSM/CH60 = 2036MHz) at N600, pin 4 (app. –20dBm) – Frequency deviation 0Hz!
Check 71MHz intermediate frequency output at N600, pin 15, 16.
Check soldering of N600 and/or change CRFU if necessary.
No RX in PCN-mode only
Check IF 187MHz at N600 pin 45, 46 (out) and pin 11, 12 (in)
Check IF 71MHz at N600 pin 15, 16 (out)
Check ¼ VHF 116MHz at N600 pin 9
Check V_VHF = 2.8V at N600 pin 13 – if not ok, change CCONT N100
© 2001 Nokia Mobile Phones
CONFIDENTIAL
NSE-8/9
Date: 05.09.2001
Local mode/Testing/RF Controls/Active unit "RX"/continuous mode
for additional information see Service Bulletin 018
Checked by:
CC Training Group
38 (48)
Repairhints
Version 5.0 Approved
Approved by:
Technical Services