ZX Spectrum Harlequin rev. G problem with keyboard
Posted: Tue Feb 14, 2017 7:23 pm
Hello All,
I've bought recently in the Internet Harlequin rev. G board with all necessary parts.
After soldering - first test ... power on ... and success !!!
Screen ok. Sound ok.
But when I connected the keyboard it turned out that the keyboard didn't work .
During soldering I had my doubts how to solder transistors 2SA1175.
On the board is mark ECB from bottom board to top.
B
C
E
In notes (datasheet) 2SA1175 transistor has: looking at flat side with text - from left to right - BCE.
It means that flat side with text should be on the left (on the board). I dit it in this way.
Unfortunately on many pictures with Harlequin rev. G is on the right
Please help me!
Many thanks in advance.
I've bought recently in the Internet Harlequin rev. G board with all necessary parts.
After soldering - first test ... power on ... and success !!!
Screen ok. Sound ok.
But when I connected the keyboard it turned out that the keyboard didn't work .
During soldering I had my doubts how to solder transistors 2SA1175.
On the board is mark ECB from bottom board to top.
B
C
E
In notes (datasheet) 2SA1175 transistor has: looking at flat side with text - from left to right - BCE.
It means that flat side with text should be on the left (on the board). I dit it in this way.
Unfortunately on many pictures with Harlequin rev. G is on the right
Please help me!
Many thanks in advance.