Y-E Data YD-380 - Drive Motor Assembly (on Motor Control PWB)

4.9 Drive Motor Assembly (Refer to Chapter 5, figure 2)
4.9.1 Service Check
1. Power up the drive.
2. Insert a disk and move the front lever to lock position.
3. Set the MOTOR ON signal on the interface to Low Level in
order to start the drive motor.
4. Load the read/write heads against the disk.
5. Connect a counter to TP3 and GND on the PWB.
6. Verify that the index pulse period (TP3) is within 166.7 ms
tl.5% (164.2 to 169.2 ms).
____ n 166.7 ms ~ 1.5% D .... _
Figur~ 4.9.1
Variable Resistor
Drive Motor
Rotor
Motor Control P\lB
Figure 4.9.2