Atari 1050 Alignment procedure#

• Switch on drive with no disk
• shortcut TP7 and TP8
• connect scope gnd to TP17
• connect scope probe to TP 10, adjust C36 to 125 KHz
• connect scope probe to TP 9, adjust VR3 to 250 ns pulse width
• connect scope probe to TP 11, adjust VR5 to 1 us pulse width
• remove shortcut between TP7 and TP8

(I hope I didn't mix up TP9 and TP11 values, so please check for the smaller pulse width first and verify)

ep, 09.06.2002