Posted By
TLC
on 2005-10-30
14:04:01
|  Re: keyboard and tape deck wont respond
Hi!
There are several possibilities for these problems. For me, they seem to be separate (but they could have been caused by the same fault).
The tape deck:
-- The tape deck itself may be faulty. (Try another one).
-- The fuse in the computer may be blown (this option only applies to the Plus/4; in the C16 and 116, a blown fuse would also mean black screen).
-- U5, 6529B might be broken
-- U6, 7406 might be broken
-- U2, 8501 (the CPU) might be slightly broken.
The first two are easy to check. The latter 3 are slightly harder. (needs someone experienced enough).
As for the keyboard, the possibilities are:
-- Keyboard connector. If the red LED lights up when turning the computer on, then it should be connected.
-- U27, 6529B
-- U19, FPLA
-- U1, 8360 (TED)
If you connect a joystick to the computer, and when moving it around, you see characters appearing on the screen, then the TED is correct and you could suspect the 6529B or the FPLA.
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