hello, the following problem:
the thinkpad would charge after reinserting the battery after charger is plugged. however, also when the adapter is installed and the battery is removed and reinserted. charging occurs adaptive (no steady 12 v on pl101/pr110).
i have checked all mosfets (they appear to be fine), all resistors, diodes and fuses on the circuit lines as well as replaced the charger ic twice as well as pq101 and pq102. i have also tried two original batteries (the device came with external battery only) and power supplies (65 and 90 w, which are also correctly recognised in the adapter sense circuit and lenovo vantage - right battery percentage is shown there, too) and a different charging socket. the problem persists.
when the battery is removed in windows, the notebook locks up because the charge level is too low (after reinserting the battery everythinf works fine though)... bios and me are up to date. the notebook runs on battery or power supply without any problems.
BAT_FET_HOT is pulled down, so it's ok.
-EXTPWR is working fine (pulled down when charger is plugged)
here are the measurements for bat ic voltages (second column: bat is charging):
1 20,5 20,45
2 20,5 20,45
3 20,26 20,04
4 26,23 26,14
5 3,26 3,27
6 2,77 2,76
7 0,051 0,127
8 0,008 0,016
9 0,1 0,1
10 0,97 0,97
11 3,3 3,3
12 3,3 3,3
13 0 0
14 0,02 (floating) 0,02 (floating)
15 0 0
16 3,3 3,3
17 10,81 11,06
18 10,03 11,06
19 10,81 11,05
20 10,81 11,05
21 1,18 1,18
22 0 0
23 0 1,93
24 6,04 6,04
25 10,55 16,9
26 10,73 14,18
27 10,81 11,09
28 20,24 20,13
no shorts found. could it be a thinkengine issue?
i'm totally confused... schematics attached
the thinkpad would charge after reinserting the battery after charger is plugged. however, also when the adapter is installed and the battery is removed and reinserted. charging occurs adaptive (no steady 12 v on pl101/pr110).
i have checked all mosfets (they appear to be fine), all resistors, diodes and fuses on the circuit lines as well as replaced the charger ic twice as well as pq101 and pq102. i have also tried two original batteries (the device came with external battery only) and power supplies (65 and 90 w, which are also correctly recognised in the adapter sense circuit and lenovo vantage - right battery percentage is shown there, too) and a different charging socket. the problem persists.
when the battery is removed in windows, the notebook locks up because the charge level is too low (after reinserting the battery everythinf works fine though)... bios and me are up to date. the notebook runs on battery or power supply without any problems.
BAT_FET_HOT is pulled down, so it's ok.
-EXTPWR is working fine (pulled down when charger is plugged)
here are the measurements for bat ic voltages (second column: bat is charging):
1 20,5 20,45
2 20,5 20,45
3 20,26 20,04
4 26,23 26,14
5 3,26 3,27
6 2,77 2,76
7 0,051 0,127
8 0,008 0,016
9 0,1 0,1
10 0,97 0,97
11 3,3 3,3
12 3,3 3,3
13 0 0
14 0,02 (floating) 0,02 (floating)
15 0 0
16 3,3 3,3
17 10,81 11,06
18 10,03 11,06
19 10,81 11,05
20 10,81 11,05
21 1,18 1,18
22 0 0
23 0 1,93
24 6,04 6,04
25 10,55 16,9
26 10,73 14,18
27 10,81 11,09
28 20,24 20,13
no shorts found. could it be a thinkengine issue?
i'm totally confused... schematics attached
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