Power On/Off Actuator Switch And Cable Check Removal/Replacement Procedure - IBM System/36 Maintenance Information Manual

410 Power On/Off Actuator Switch and Cable Check
Removal/Replacement Procedure
Actuator/Cable Check Procedure
1. Power off the 5363 and disconnect the power cord at the customer power outlet.
2. Remove the covers ("305 Cover Removal" on page 3-2).
3. Rotate the cable coupler one half turn clockwise to disconnect the cable from the power supply.
4. While setting the power switch on and off, check for cable movement of approximately 6.35 mm (1/4
inch) at power supply end.
5. If the cable does not move approximately 6.35 mm, disconnect the cable from the actuator.
6. Verify that the cable moves freely within the tube.
7. If the cable does not move freely, replace the cable. See "Actuator/Cable Removal/Replacement
Procedure" in this procedure.
8. If the cable moves freely, check the actuator to verify that the actuator mechanism, when set on and off,
is moving approximately 6.35 mm.
9. If the actuator does not move 6.35 mm, exchange the actuator. See "Actuator/Cable
Removal/Replacement Procedure" in this procedure.
10. If both the cable and the actuator function correctly, connect the cable to the power supply and manually
power on the power supply by pulling the cable approximately 6.35 mm.
11. If the cable can be moved the 6.35 mm, and the power supply does not power on, connect the cable to
the actuator and go to "420 Power Supply FRU Isolation Procedure" on page 4-6, step {420LI2}.
12. If the cable can be moved the 6.35 mm, and the power supply does power on, connect the cable to the
actuator, this procedure is then complete.
Actuator/Cable Removal/Replacement Procedure
1. Power off the 5363 and disconnect the power cord at the customer power outlet.
2. Remove the covers ("305 Cover Removal" on page 3-2).
3. To remove the actuator, disconnect the cable from the actuator and remove two screws that attach the
actuator to the 5363 frame,
4. To install the new actuator, perform. the previous step in reverse order:
5. To remove the actuator cable from the actuator and the base power supply, rotate the couplers one half
turn clockwise.
6. Lift out the power on/off cable assembly.
7. To install the new cable assembly, perform. previous steps 6 and 5 in reverse order.
Note: When reinstalling the actuator into the 5363 frame, install the housing with bevelled edge facing up,
and towards the diskette drive. If this note is not followed, the on and off switch setting will be
reversed.
4-4
5363 Maintenance Information