GI CFT-2000 and CFT-2100
These analog cable receivers were commonly used in the UK market by NTL and MK Cable. The CFT2143/102/RC/UK/A seems to be the model most commonly deployed in the UK.
Branding on these was General Instrument; the Jerrold brand was omitted.
Hardware
- System ROM: 27C512, encrypted (encryption is trivial)
- Main CPU: W65C02S core, possibly in the form of a custom ASIC (like the BSB ACM)
Display board
The display board carries:
- An infrared receiver
- Two Liteon LTD-6910HR dual 7-segment LED displays
- The left display is mounted with the decimal points at the top
- The right display is mounted with the decimal points at the bottom
- A 74LS164 shift register
- Several driver transistors.
The interface to the motherboard consists of:
- Display 1,2,3,4 drive enable (4 pins)
- Clock and data to 74LS164
- Infrared signal to main PCB
TODO: Segment to data bit map
Known hardware issues
Bad capacitors -- recapping
TODO: list of capacitors