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1-2-6 Track 00 Adjustment
I nterrupter A K
Figure C-17. Track 00 Adjustment
(1) Make this adjustment after the CE is adjusted,
(2) Point to which Probes are connected:
Connect CH-2 to pin 1 of TP-2, and CH-t to pin 2 of TP-2.
Pin 4 of TP-lls connected to GND. The dse of the STEP signal em'ltted from pin 1 of TP-2 is synchronized.
(3) Set the oscilloscope as following condition:
Mode set to chop
Volts set to 2VIdiv.
Time set to 1 mS/div.
(4) Connect an exerciser to the FDD unit,
Set the exerciser to generate STEP pulses at 6 mS rate to allow the carTier to continuously move between track 0 and
track 2, (The timer for $T motor reverse should be 21 mS minimum.)
C-13
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