IBM 5160 - Motherboard Switch/Jumper Settings
On versus off
For the switches, some people are unsure about which position is on and which position is off.
If you are unsure, then click here to see examples.
Switch block SW1
These settings apply to both versions of the 5160 motherboard, and apply to all three BIOS revisions for the 5160.
The end of a small screwdriver fits into the slot on the top of the adjustable capacitor.
When using a composite monitor (or TV) as the display, adjusting the capacitor fine tunes the colours that appear. Adjusting the capacitor does not affect the colours that appear on a digital monitor (MDA/CGA/EGA).
The capacitor's adjustable value is 5-30 pF. If you need to replace the capacitor, and are having trouble finding a suitable replacement, then consider using a fixed value capacitor of say, 20 pF. (Diagram)
Technical: Fine tunes the motherboard 14.31818 MHz clock signal, which in turn, fine tunes the NTSC 3.579545 MHz colour burst signal that the CGA card sends to the NTSC composite monitor. (Diagram)