XL1201 Merlin II Chip Reseating
UPDATE: I clipped and removed the broken capacitor. Replacing it will be the task of another day. I spent two days removing, cleaning and reseating each DIP chip on the Symbolics XL1201 Merlin II Main … »
Detailed Inspection of XL1201 Merlin II Solder Side
To see if I can isolate the cause of the XL1201 instability, I am going to physically inspect the two main cards with a loupe and flashlight. If I see anything suspect, I’ll take a picture with … »
Console Internals
This is a Symbolics Model PE36-PCONS, Part No 365404 Rev C console. My serial number is 21811. (“There are many like it, but this one is mine.”) An album of detailed internal photographs … »
Broken SCSI Pin on XL1201
Well, I was installing a new hard drive into the XL1201 today and just before I connected the SCSI cable, I noticed a pin seemed to be missing on the 50-pin SCSI male connector on the backplane. On … »
Console Monitor Adjustment
There are 10 controls for monitor adjustment. Two large finger controls, a group of 6 small multi-turn trim controls for vertical, and a group of 2 small multi-turn trim controls for horizontal. You … »