Toshiba HX-10 (UK) Failing Joystick ports

By Vyper68

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17-09-2018, 01:27

Hi
Has anyone have any experience of problem Joystick ports on this model? It started out with Joystick 1 not working but now both Joystick 1 & 2 are not responding to inputs. I can get Joystick 2 back up and working by piggybacking a new 74LS157N on one chip but doing the same for both has not brought Joystick 1 back. I have ordered a 10k 13 Pin Bussed resistor network and a 74LS09N as well as I cannot think what else to check other than the YM chip but given Joystick 2 can work I don't think that is the problem.
So I am looking for some help narrow the problem down before I get my soldering Iorn out.

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By Vyper68

Supporter (8)

Vyper68's picture

18-09-2018, 11:14

Just as a update I have found one of the resistors in the Bussed network is below every other one all are reading 10K Ohms one is coming out at 6K Ohms so I think that might be the problem. We shall see when the new ones arrive.

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