Energy Management Calibration; Baseband Troubleshooting Tips - Nokia 6260 RM-25 Service Manual

RM-25
Baseband troubleshooting

Energy management calibration

EM calibrations should be carried out with a JBV-1 docking station attached to a DA-25 docking station adapter.
Power to JBV-1 should be supplied from an external DC power supply. JBV-1 input voltages: nominal + 12 VDC,
maximum +16VDC.
On the JBV-1, A/D converter, BSI, BTEMP, battery voltage (VBAT), charger voltage (VCHAR), charger current (ICHAR)
and battery current (IBAT) are calibrated.
For detailed information and instructions, see

Baseband troubleshooting tips

ADC-offset over limits
Inspect the BSI line and its components. Note that the BSI resistance line of the battery is connected to the AD
input of the UEME labelled LS (not the BSI input). If these are OK, change PWB.
BSI gain over limits
Inspect the BSI line and its components. Note that the BSI resistance line of the battery is connected to the AD
input of the UEME labelled LS (not the BSI input). If these are OK, change PWB.
Vbatt offset and gain
Inspect Vbatt lines and its components.
VCHAR over limits
Inspect components that are connected to VCHAR line: filtering capacitors C134, C135, TVS V130, L130 and fuse
F130. If those are OK, change PWB.
ICHAR over limits
Inspect components that are connected to VCHAR line: filtering capacitors C134, C135, TVS V130, L130 and fuse
F130. If those are OK, change the current sense resistor R259 first. If calibration is still not successful, change PWB.
Calibration can be checked using the ADC reading. Known voltages, currents and resistances are fed to and read
by the ADC reading. The read values can then be compared with the known values.
ADC reading
Divided and scaled battery voltage, battery current, charger voltage, charger current and BSI values can be read
by this tool. Read values a few times until you can be sure that results are accurate.
9235618 (Issue 2)
energy management calibration instructions (Page
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