|
Power Supply
Opening Case Opening Case
Removing Front Bezel Open side cover. Look in the bottom front corner- pull the speaker/battery assembly out horizontally by grabbing the speaker assembly frame and pulling it. Don't pull the battery header out of the planar, if that happens, your configuration will disappear. Just put the loose speaker assembly down on the bottom of the case. Notice the white thermoplastic catch below the grille? Press it down and out towards the front of the case. The second catch is sort of hidden by the black foam around the grille. Feel for the inner edge of the foam (towards the inner side of the case) and you will feel the end of the second catch. Push it down and to the front. Once both catches are started (pushed level with the case) grab the bottom edge of the front bezel and pull it out. The bezel should come off. Note: This bezel is NOT like the 95 bezel where there are upper pivots. There is a single catch to the right of the power switch. Think of the two bottom catches and the top catch in the same way you'd pick up a bowling ball (which I haven't done since High School). These "fingers" grip the frame of the case and pull the bezel onto it. Opening Locked Unit (from Tony Ingenoso) It's very easy if there's no card in the bottom slot, less easy if there is.
Once the first tab is clear, pull the cover out enough to slip a shim in so it doesn't snap back in place again on you. Once both are clear, the cover will come off. If there is a card in the bottom slot, it presents more of a problem. If it looks like something you don't mind wasting, loosen the retainer, pull on connectors to get it out of the MCA slot and jam/twist/break enough of the thin metal out of the way so you can get in with the long thin screwdriver. Alternative Approach Drill a couple of small holes in the bottom of the case where the cover tabs are located, then use these holes to apply pressure to the tabs to get them to release. This doesn't involve having to waste something in slot 8, but it does involve mangling the case to a very minor degree. Use a depth gauge! If you drill through the retaining tab, there will be nothing to push on ;->
Ed. Measured my 8580. Front tab is 2.8" from front corner, 1.5" in, set depth to .25". Rear tab is 3.6" from back, 1.5" in, .25" deep. Floppy Support Structure
1780 POST Error on 8560 & 8580 (Record number: H064300) When a 1780 post error is displayed on an 8560-041 or 8580-041, verify that the fixed disk cables are installed properly. Correct installation of the cables is shown in the Model 60 and Model 80 HMR. Time / Date / Config Lost or Disk Error on 8560 & 8580 Believe it or not: the above mentioned errors often have one common reason. Most recent effect is a frequent lost of configuration, internal clock shows totally wrong values after longer power off cycles or the disk drive has a lot read/write errors and installing a new battery or cleaning the disk-drive doesn't help. Of course: it is a cleaning problem, but on the systemboard. Don't do this in your office! Everything will get very dirty. It is astonishing how much dust can sit inside a single power supply. Now look on your systemboard. It is awfully dirty, right ? I thought so. Take a brush and a vacuum-cleaner to get it properly clean. Look for dust and particles, which stuck between pins of the integrated circuits. Just under the area where the fan sits, you will find (on a Mod. 80 board - after a close look)
All in all this is a very sensible area - and the collected dust is conductive in most cases and may cause the above mentioned trouble. Re-assemble the PC, start reference disk, set date, time and configuration again and try, if everything works again. Time Not Updating j131 asked: Alfred Arnold replies: Low Battery Voltage May Cause Config Errors (Record number: H024809) Intermittent configuration errors (161, 162, And 163) may be caused by Low Battery Voltage or defective speaker battery assembly, FRU P/N33f5950. To Check Battery Voltage:
The battery, FRU P/N 72X8498 should be replaced if it is below 5.5 V DC. Note: Remove battery from speaker/battery assembly when checking voltage in order to ensure an accurate voltage reading. Floppy Drive Variants and Reliability (Mitsubishi and ALPS) > Ask somebody for the drive from an unused 8580. > How long is the half life time of these drives? They seem to die quite often! The ALPS drives had a much higher error rate than the Mitsubishi drives. The ALPS are also much more wicked to take apart due to the amount of "0"-sized Philips screws. The Mitsubishi is a somewhat cheap design, but far more easier to service. Both drives are dust collectors due to the lack of a dust-shield covering the disk slot when no floppy is in the drive. The Mitsubishi 355 tends to collect dirt around the R/W-head actuator spindle - which causes the head to stick and to improper positioning. The ALPS often loose the head-damper plate (a piece of metal with some foam pad - glued on the R/W head assembly (It's a remove-and-throw-away part). The Mitsubishi also tend to have "killer caps" installed - which cause 600-errors (electronic errors). See details below. Replacing Capacitors Alan Douglas sounds off with: > For replacement of the 22uF and 1uF caps, I used surface-mountable electrolytic caps of the same type. However, 0.22uF electrolytic caps are difficult to obtain, so I used ceramic caps instead. I also used ceramics there, and tantalum chips for the others. The repair / checkup is nicely displayed HERE. Just a note that I occasionally repeat: the best way of locating bad electrolytics is by checking their effective series resistance (ESR). [Ed.] Search for "ESR meter" online. On-Board Video The VGA supports a maximum of 720-by-400 picture elements (PELs) in text mode and 640-by-480 PELs in graphics mode. The VGA can support 256 colors or 64 shades of gray at one time. Composite video is not supported. Note that the on-board VGA provides the Base Video capabilities, so there is no BVA slot on the planar, it only provides one or two AVE slots. Warning: Some non-IBM graphics adapters drive rather than receive VGA signals. If more than one adapter that drives a VGA signal is installed in a system, both adapters will be damaged. |
