IBM 5153
| IBM 5153 Personal Computer Color Display | |
|---|---|
 |
|
| 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 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
[edit | edit source]- 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
[edit | edit source]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
[edit | edit source]- 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
[edit | edit source]The 5153's CRT retains a lethal anode charge. Discharge before opening — see CRT Discharge Procedure.