Editing IBM 5153

{{Infobox computer peripheral
| name          = IBM 5153 Personal Computer Color Display
| image         = [[File:IBM 5151 5153 5154 monitors.jpg|260px]]
| caption       = IBM monitors from left to right: 5151 monochrome, 5153 colour CGA, 5154 EGA
| manufacturer  = IBM
| type          = TTL RGBI colour CRT monitor
| release_date  = March 1983
| interface     = TTL RGBI, 9-pin D-shell (paired with the [[IBM Color Graphics Adapter]])
| compatible    = [[IBM PC (5150)]], [[IBM PC XT (5160)]], any CGA-compatible system
| dimensions    = 13" CRT
| model         = 5153
}}

The '''IBM 5153''' (the '''IBM Personal Computer Color Display''') is the 13-inch RGBI colour monitor IBM introduced in March 1983 to pair with the [[IBM Color Graphics Adapter|Color Graphics Adapter (CGA)]] in the [[IBM PC (5150)]] and [[IBM PC XT (5160)]]. It can render all 16 CGA colours, including the famous '''brown''' that lower-quality third-party CGA monitors typically reproduced as dark yellow.

== Display Characteristics ==

* '''CRT:''' 13" shadow-mask colour tube.
* '''Resolution:''' 640 × 200 (CGA mode 6, monochrome graphics) or 320 × 200 (CGA mode 4/5, four colours); 80 × 25 or 40 × 25 text.
* '''Vertical scan:''' 60 Hz.
* '''Colour interface:''' TTL RGBI — four digital lines (Red, Green, Blue, Intensity).

The 5153 reduces the green signal amplitude internally; this is the trick that produces "brown" from the (R + G) bit combination at low intensity. Third-party clones that drove R, G and B with equal gains showed dark yellow in that combination instead.

== Input Connector ==

DB-9 female TTL RGBI:

* '''Pins 1, 2:''' Ground
* '''Pin 3:''' Red
* '''Pin 4:''' Green
* '''Pin 5:''' Blue
* '''Pin 6:''' Intensity
* '''Pin 8:''' Horizontal sync
* '''Pin 9:''' Vertical sync

== Common Faults ==

* '''Convergence drift''' — colour fringing at the edges. Adjustable via the convergence trimmers behind the rear bezel.
* '''Loss of one colour channel''' — dry joint at the DB-9 input, or a failed video amplifier transistor on the corresponding RGB output.
* '''Geometry distortion''' — failed deflection-circuit electrolytics on the chassis board.

== CRT Safety ==

The 5153's CRT retains a lethal anode charge. Discharge before opening — see [[CRT Discharge Procedure]].

== References ==

* [https://crtdatabase.com/crts/ibm/ibm-5153 IBM 5153 entry on CRT Database].
* [https://int10h.org/blog/2022/06/ibm-5153-color-true-cga-palette/ "The IBM 5153's True CGA Palette and Color Output"], int10h.org.

== Related Pages ==

* [[IBM PC (5150)]]
* [[IBM Color Graphics Adapter]]
* [[IBM 5151]]
* [[CRT Discharge Procedure]]

[[Category:IBM]]