CONFIDENTIAL
11 (17)
RAE-3 Repairhints
Customer Care Europe & Africa Version 2.0 Approved
SCCE Training Group 13.03.2002
© 2002 Nokia Mobile Phones
Checked by:
Customer Care Training Group
Approved by:
SCCE
N505 HAGAR faulty
- Check VTCXO (VXO) = 2.8 VDC at C553. If not ok, check N100 CCONT.
- Check 26MHz (Vpp = 800mV AC) at R835, frequency deviation ±100Hz (See picture below).
- If not ok, check G830 oscillator circuit.
- Check RFC = 13MHz (Vpp = 800 mVAC) at L800, frequency deviation ±50Hz (See picture below)
- If not ok, check V800 and surrounding components for shorts or disconnections and change the faulty ones, otherwise
probably N505 HAGAR circuit is faulty.
- Check Vsynte (VSYN_2) = 2.8 VDC at C561. If not ok, check N100 CCONT.
- Check VREF_2 = 1.5 VDC at R564. If not ok, check N100 CCONT.
- Check Vchp = 4.7 VDC at C560. If not ok, refer to G800 SHF oscillator faulty
- Check Vrxrf (VRX) = 2.8 VDC (RX active). If not ok, check N100 CCONT.
- Check Reset = 2.8 VDC (in Local Mode) and 2.8V pulse (in Normal Mode / one part (RX/TX) active) at R800 (See picture
below)
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