| Date |
User |
Note |
| 2018-05-15 00:00:00 |
|
Doesn't respond to JTAG |
| 2018-05-17 00:00:00 |
|
Short circuit between 5V and gnd. LDO3, LDO5, LDO_CLN show heating at ~150C on thermal camera. |
| 2018-05-17 00:00:00 |
|
Resistance between 5V and gnd decreases as LDO3, LD05 input voltage traces cut. Suspect that multiple LDOs have failed short. |
| 2018-05-18 00:00:00 |
|
LDO3, LDO5 and LDO_CLN replaced. Voltages look okay, JTAG device is detected. Input voltage traces for LDO3 and LDO5 restored. |
| 2020-10-02 00:00:00 |
|
sent to Dorigo to replace 5V voltage regulators. K.O. |
| 2020-10-04 00:00:00 |
|
returned from Dorigo. all voltages are low. suspect blown 5V fuse F1. K.O. |
| 2020-10-06 00:00:00 |
|
fuse replaced D.B., voltages ok, firmware boot ok. K.O. |
| 2020-10-11 00:00:00 |
|
check SCA control signals: SCA-C no read clock, SCA-C write clock sawtooth, SCA-D write clock sawtooth. K.O. |
| 2020-12-09 00:00:00 |
|
offset resistors replaced by K.O. and P.W. |
| 2020-12-09 00:00:00 |
|
SCA C read clock repaired by D.B. |
| 2021-09-10 00:00:00 |
|
SCA A,B,C,D bad temperatures. K.O. |
| 2023-03-31 00:00:00 |
|
SCA C and D disabled at CERN because they give bad data. K.O. |
| 2023-06-15 00:00:00 |
|
Removed from TPC |