J. Kissel

I'm continuing along the lines of health checks after the the 2021 vent, and I've found that the SUS IMs are non-functional. My suspicion is that the DAC cards are not driving out any signal, as a result of the recent ham2b IO chassis upgrade (can't find an aLOG), or the OSB building-wide power outage (LHO aLOG 60683).

Evidence: 
    - Driven M1 drive to M1 sensor transfer functions show absolutely no coherence. 
    - The coil driver monitor circuits don't show any action when you turn ON or OFF alignment offsets

Thing's I've verified / checked for functionality:
    - Drive comes out of the TEST bank
    - EUL2OSEM matrix is as normal.
    - Verified COILOUTF gains are the correct sign for a HAUX M1 AOSEM suspension stage
    - Can see the MASTER OUT requesting drive,
    - Can see the user model GDS_TP screen showing the requested drive
    - Can see the IOP model GDS_TP screen showing the requested drive
    - There are no digital watchdogs tripped, USER model or IOP Software Watchdogs 
    - The electronics in SUS-C4 all look happy except for one suspicious thing (sadly IM1, IM2, IM3, and IM4 are still labeled as SM1, PMMT1, PMMT2, SM2)
         - 18 bit DAC interface cards are connected to the 18-bit AI chassis
         - 18-bit AI chassis has "look alive" lights ON indicating that the IO Chassis can "see" its DACs and AI chassis
         - AI chassis is connected to HAM-A coil drivers
         - HAM-A Coil driver coil drive lights are ON and green. 
         - SUSPICIOUS -- BIO Input and Output connects are made, but lights are *OFF*. I thought that these HAM-A drivers have been jumpered with their low-pass filters ON, but these are the ONLY HAM-A drivers that *did* get remote control switching installed. I THINK THESE SHOULD BE ON AND LIT UP...
         - The HAM-A coil driver output is connected to the SUS-R2 remote rack UK satellite amplifiers
         - The UK satamp lights are all ON and green

I attach a picture of the bottom of the CER's rack SUS-C4, which houses the HAM-A drivers for IM1 = SM1, IM2 = PMMT1, IM3 = PMMT2, and IM4 = SM2 at rack U-heights U14, U13, U8, and U7, highlighting the suspicious lack of bright green lights on the right-hand side of the drivers which house the Binary Input and Binary Output connections.
I traced this information from both -v8 and -v7 of the HAM2 wiring diagram, D0902810.

I didn't realize/remember until writing this aLOG that I should have checked the BIO chassis and IO chassis BIO card lights...

I've asked Fil to take a look when he get's the chance.