IBM 1200 Hardware Maintenance Manual page 49

Terminal (NiMH)
5
6
7
Terminal (Li-Ion)
1
2
3
4
5
6
7
Note: Signal lines, not used in these steps, are used
for communications between the system and the
battery.
3. First, discharge the battery, until the voltage is less
than 9.6V (NiMH) or 14.4V (Li-Ion). Then, charge the
battery for 30 minutes. Now, check the voltage. If the
voltage is still less than 9.6V (NiMH) or 14.4V (Li-Ion),
replace the battery.
4. If the voltage is more than 9.6V (NiMH) or 14.4V
(Li-Ion), measure the resistance between battery
terminals 1 and 5. The resistance must be 10K
(NiMH) or 390 (Li-Ion). If the resistance is not correct,
replace the Battery ASM. If the resistance is correct,
replace the system board.
Signal / Voltage (V dc)
Thermal
BT+SENSE
BT+ (0 V. - 14.4 V.)
Signal / Voltage (V dc)
Ground
BT-SENSE
BT-SCLK
BT-SDATA
Thermal
BT+SENSE
BT+ (0 V. - 16.8 V.)
ThinkPad i Series 1200/1300
39