Electronics > Repair
Rohde & Schwarz SMIQ03B with Error 110 Output unleveled; IQMOD: ALC failure
little.tesla:
--- Quote from: zmetzing on August 21, 2020, 06:54:06 pm ---What is the "Factory Installation Key" on the back? Would that turn it back into a SIMQ03B, if entered into the appropriate software or into the instrument itself?
--- End quote ---
The Factory Installation Key defines/enables the model (e.g SMIQ03, SME03 etc) in the software, since the software is generic for all generators SME, SMT, SMIQ (exception is the fast CPU option). To my knowledge it's entered after a blank software install. I don't know if it can be changed once entered or how it's entered. Hope this helps a bit.
zmetzing:
--- Quote --- The Factory Installation Key defines/enables the model (e.g SMIQ03, SME03 etc) in the software, since the software is generic for all generators SME, SMT, SMIQ (exception is the fast CPU option). To my knowledge it's entered after a blank software install. I don't know if it can be changed once entered or how it's entered. Hope this helps a bit.
--- End quote ---
Indeed it can be, and I thought about this around lunchtime. The trick is to unlock LEVEL 3 access, and then a new option appears under UTILITIES -> INSTALL -> FACTORY INSTALLATION KEY. Make sure to set "FACTORY OPTION TO INSTALL..." to SMIQ03B.
I now have a fully-functional SIMQ03B! Hope this narrative helps others.
(Now I have to eat some crow and apologize to the eBay seller for suggesting that he/she sold me the wrong unit.)
RecursiveLogic:
I've been working on a SMIQ 03 (non B) model. It's been interesting following your thread, and working parallel to your progress. Currently I am trying to resolve the issue with IQCON no convergence during calibration. The only error I'm dealing with is Error -313 Calibration Memory Lost; LEV PRESET run internal calibration.
There are some differences with the IQ-Modulator board... most notable S1 and S2 are populated with YSW-2-50DR. Has anyone else encountered these chips, and is the HMC270 a valid replacement, or am I better justified going with an M3SWA-2-50DRA+ as a possible recommended replacement?
I've also included an example of a previous repair made on the board, most likely to correct an Error 110, which I've had to fix for obvious reasons.
zmetzing:
--- Quote from: RecursiveLogic on August 25, 2020, 07:12:21 pm ---is the HMC270 a valid replacement, or am I better justified going with an M3SWA-2-50DRA+ as a possible recommended replacement?
--- End quote ---
The YSW-2-50DR looks to be logic-level control with 3.3V positive logic (0, +3.3), so the HMC270 chip, which uses 0V and -6V, would not be the appropriate choice.
The M3SWA chip looks like it would work, with a few flying wires, with the small caveat that it doesn't go all the way to DC (0.3MHZ or 300kHz). If the signal it switches stays above this lower limit, which it might if it's the first switch out of the IQCON block, it'll work just fine.
Good luck, and, yeah, it looks like someone tried to use a branding iron to install that transistor. :-)
techneut:
--- Quote from: RecursiveLogic on August 25, 2020, 07:12:21 pm ---I've been working on a SMIQ 03 (non B) model. It's been interesting following your thread, and working parallel to your progress. Currently I am trying to resolve the issue with IQCON no convergence during calibration. The only error I'm dealing with is Error -313 Calibration Memory Lost; LEV PRESET run internal calibration.
There are some differences with the IQ-Modulator board... most notable S1 and S2 are populated with YSW-2-50DR. Has anyone else encountered these chips, and is the HMC270 a valid replacement, or am I better justified going with an M3SWA-2-50DRA+ as a possible recommended replacement?
I've also included an example of a previous repair made on the board, most likely to correct an Error 110, which I've had to fix for obvious reasons.
--- End quote ---
Any luck with the "IQCON no convergence" error? I have SMIQ 02E with the same error and also the same switch. Unfortunatly is the board different from the SMIQ-03B so I can't use those schematics and testpoints.
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