Nokia 6310 - Page 11

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NPE-4 6310/NPL-1 6310i Repair Hints
Customer Care Europe, Middle East & Africa Version 3.0 Approved
SCCE Training Group Date 22.04.2003
© NMP 2003
Checked by:
SCCE Training Group
Approved by:
SCCE
“Totally dead” voltages and signals to check
To make the following measurements it is necessary to press the power switch button on several times, otherwise all
signals and voltages are only visible for around 250ms (except VBATIN).
Check VBATIN=3.6 VDC at L260 (depends on workbench supply). If not ok, check X101, X102 battery connectors for
mechanical damages or cold solderings. Refer also to chapter “Additional information/Different battery connectors”.
Check 32.768 kHz sinewave, Vpp = 800 mV at C210 (see picture below).
Oscilloscope settings:
Ampl: 200mV
Time/Div: 10µs/Div
AC/DC/GND: AC
If there is no signal, check B200 circuit for shorts or disconnection and change faulty components.
Check PWRONX at S300 pin 2/ 4: Key not pressed = 3.6 VDC (depends on Workbench supply voltage)
Key pressed = 0 VDC
If not ok, check PWRONX-line from S300 to UPP D400 for shorts or disconnections.
Check SleepClk = 32.768 kHz, Vpp = 1.8 V square wave at J404 (see picture below).
Oscilloscope settings:
Ampl: 500mV
Time/Div: 10µs/Div
AC/DC/GND: AC
If not ok, check 32kHz B200 circuit for shorts or disconnections.