Tsr Power Supply, Removal And Replacement; Tsr Power Supply - IBM 3274 51C Maintenance Information

4.10 TSR Power Supply, Removal and
Replacement (Figure 4-9)
CAUTION
The temperature of the TSR transformer
0
may
exceed safe-handling limits.
1. Place the
fTl /
lQJ
(on/off) switch in the
lQJ
position.
2. Remove the power cord plug from the building power
receptacle.
3. Open the gate and power supply housing (paragraph
4.2).
(R16)
J1
_E2 (Wire No.2)
CD
E1 (Wire No.1)
Figure 4-9. TSR Power Supply
4-10
4. Remove the plastic shield (to be reinstalled on the new
supply)
e.
5. Disconnect J 1 and J2 connectors from the TSR Power
Supply
G.
6. Disconnect the push-pin wires from E1, E2, and E4
G)
7. Remove the hex holding screw located under the cable
G
(near the hinge).
8. Slide the power supply out of the guides (away from
hinge ).
9. To reinstall, reverse these steps.