Nokia 3510 Repair Manual page 9

Customer Care Europe, Middel East & Africa
SCCE Training Group
 2003 Nokia Mobile Phones
I010 (X101)
Check mechanical appearance of battery connector; change part if it is bent, soiled or corroded.
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S300
Check mechanical appearance of powerswitch; change part if necessary.
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Check voltage at S300: 4 VDC in case the switch is not pressed.
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If voltage is not measureable or too low check especially R317 and C310.
If switch is pressed, voltage at R317 (measure to UEM side) must decrease to 0V; otherwise you have to
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exchange the switch
B200
- Check DC-voltages at C209 (0.59V) and C210 (0.42V). If voltages are not ok check lines for shorts to ground.
It also is possible that UEM D200 is defect.
Change the crystal B200 if DC-voltages at C209 / C210 are ok but no 32.768kHz sinewave signal is measurable
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(see picture below).
Note that this signal is always measurable in MJS-37 jig even though the phone is switched off.
Figure 1: 32.768kHz at C209
N600 (Mjoelner)
- Check VR3 2.8VDC at C620.
Check 26MHz sinewave signal at B600 (picture below). If it is not measurable check DC-voltage at both sides of
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crystal B600 that normally is 2VDC. In case that DC-voltage is missing Mjoelner N600 has to be changed. If
voltage at crystal is ok but no 26MHz sinewave is measurable crystal B600 has to be exchanged.
Figure 3: 26MHz at B600
© NMP 2003
CONFIDENTIAL
NHM-8 / RH-9
Date 10-03-2003
Figure 2: 32.768kHz at C210
Checked by: SCCE
9 (18)
Repairhints
Version 2.0 Approved
Approved by: Training Group