Hi,
I have a Agilent Infiinium DSO 9104 which fails to power up. Upon pressing the power button, The sequence 2 error led's glow pointing to a failure of the +1.2 volt , shutting down the supply. This voltage is monitored by U497 LTC2928. There are three cascaded monitoring circuits monitoring all the voltages on the acquisition board. All the on board supplies are sequentially switched on, monitored and then only the instrument boots up. The main +12 volt bulk supply is good.
The LED's in Seq 2 glows as follows.
LED's 1 & 2 : ON
LED's 3 & 4 : OFF.
Has anyone repaired the power supply failure on the acquisition board?
Regards