CRT:IBM 8503

From ConsoleMods Wiki
Revision as of 19:17, 6 October 2022 by Ryccardo (talk | contribs) (Created page with "{{Infobox/CRT |model = IBM 8503 |image = |manufacturer = Tatung |type = Business |size = 12" |dimensions = |weight = |tvl = |regions = See text |240p/480i = No |480p = Yes |720p = No |vsync = 60/70 Hz |widescreen = No |component = 1x HD-15 (VGA, fixed cable) Y/H/V |chassis = |tube = |operation_manual = |service_manual = |service_bulletins = |brochure = [http://ps-2.kev009.com/pcpartnerinfo/ctstips/5546.htm] }} The '''IBM 8503 Personal System/2 Monochrome Display''...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
IBM 8503
Information
Manufacturer Tatung
Type Business
Size 12"
Regions See text
240p/480i No
480p Yes
720p No
Vsync 60/70 Hz
Widescreen No
Component 1x HD-15 (VGA, fixed cable) Y/H/V
Links
Brochure [1]

The IBM 8503 Personal System/2 Monochrome Display is the original VGA (and 31 kHz VGA only) black and white monitor, along with its premium color equivalent - the 8513.

As to IBM tradition, the full model number (MT/M) is made of a 4-character family (8503) and a 3-character specification, here indicating input mains voltage (001 is North American spec, 002 European, ...)

It runs somewhat hot due to the large resistors used in the linear power supply; electrically, however, it's a cold chassis design using a full size isolation transformer (after the socket, switch, and fuse). The high voltage connector is made of somewhat hard clear plastic which tends to retract over the years, leaving a gap for dust to get into.

It pre-dates DPMS and EDID, and does not have any OSD except for a test pattern (white screen with uncontrolled height if pin 5 is not grounded). Unused pins are not present, making it compatible with sockets that have pin 9 filled. For best compatibility with sources that do not expect such a display, an EDID & channel mixer box is desirable.

Flyback: TFB-648E, secondary 18 kV

Controls

As factory configured, the image is significantly underscanned.

External

  • Power, Brightness (with 50% stop), Contrast

Internal

  • Centering, Geometry (magnetical)
  • H/V Size
  • Static and Dynamic focus
  • Video gain (sub contrast), on neck board