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Workshop Jan 13-14 2018
- R220 in MF22 passed data through without clock. Went away during troubleshooting
- Memory bit 11 set to 1 when should be 0. Fixed by cleaning contacts on MA30 and backplane slot.
- Interrupt stuck on. Replaced bad diode on PC36. Read open but good if pressed on. Split in half when removed.
- SPA instruction not working correctly. MB5 signal level off. PA23 loading down signal. Replaced diode on card in R002 PA23.
- D1B1 memory tests failing again. Tweeked slice level again but not reliable fix. Plan to examine signals on my machine and work on more at next workshop.
- Changed transistor on MB3 on front panel. Didn't fix light on/flickering when it should be off.