|Name: 2393A Monochrome Terminal|
|Product Number: 2393A|
|Division: Roseville Terminals|
|Ad: Click to see|
|Original Price: $2095|
|Catalog Reference: 1986, page 84|
The 2393A was a modular, monochrome graphics monitor. It included an HP-HIL keyboard and the 35731 monitor. The 2393A had a maximum resolution of 640 x 400 dots. When introduced, the 2393A was HP's lowest priced graphics terminal.
These terminals can sometimes have power supply problems or problems with a sticking on/off switch (40% of cases as of 2014). The power supply is a Power-One SPL50-3200 that appears to have very poor soldering to the point where there can be many bad joints on the larger components like the main transformer and larger power resistors. This can cause the main power transistor and NTC thermistor to blow as well as the internal 3 Amp fuse. The main chopper transistor in the power supply (Q5) can be replaced with an MJE13007 NPN Power transistor if blown and a 5 ohm NTC resistor also appears to be a suitable replacement. The power switch can also break at the switch shaft, but can be fixed with JB-Weld or similar glue.^ TOP
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