DEC hardware errors, and how to repair them

This category contains a list of all defective components in DEC hardware, which could be repaired successfully by somebody.

While this list grows, it will identifiy components with high error probability.

Checking those components first will greatly speed-up any repair process.
How this LIST IS organized

  •     ONE article per per module.
  •     Article title contains module name and module number, as in the "UNIBUS field guide"
  •     Example: "RL11 / 7062 UNIBUS RL01/RL02"
  •     Each component error on the module gets a different "Heading 4" entry.

For component error entries, the following fields should be used:

  •     "Error": what was wrong ("E123 74S00 very hot")
  •     "Detection": how did you detect this error? ("PCB was very dark, noticed stench")
  •     "Repair": how you repaired it ("added bigger heat sink")
  •     "Explanation": some theory, if necessary
  •     "Documentation": title and number of the DEC documents with relevant information
  •     "Date": when did you repaired it
  •     "Contact": who did it? ("Jörg Hoppe")
Title Author
BA11 power supply Written by Administrator
BA11 power supply 2 Written by Thomas Höffken
DECnet under RSX11M on DEQNA Written by Administrator
DL11-W M7856 no communications 1 Written by Thomas Höffken
Fujitsu M2312K SMD disk drive Written by Administrator
M7891 MSL-11 124 kW Memory CSR Bit permanet 1 (Mem-Error 32) Written by Thomas Höffken
MXV11-A M8047-CA RAM-Error Written by Thomas Höffken
MXV11-A M8047-CA transmits mystery Data Written by Thomas Höffken
PDP-11 UNIBUS Written by Administrator
PDP-11/34 DD11-PK CPU backplane Written by Administrator
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