Diode Assembly, Removal And Replacement - IBM 3274 51C Maintenance Information

4.8 Diode Assembly, Removal and Replacelnent
(Figure 4-7)
1. Place the
m /
L2J
(on/off) switch in the
L2J
position.
2. Remove the power cord plug from the building power
receptacle.
3. Open the gate and power supply housing (paragraph 4.2).
4. Remove the slip-on leads to the diode (CRt) assembly
G·
Power Supply No.2
5. Remove the diode hex mounting bolt
e
and remove
the diode assembly.
6. To reinstall, reverse these steps and use Figure 4-7 to
identify diode slip-on pins.
Warning: Be sure that the diode wires are correctly
installed on the diode assembly. The TSR power supply
will be damaged
if
these wires are reversed.
\
\
\
\
\
To Capacitor Cl \
\
\
\
Figure 4-7. Prime Power Diode Assembly (CRt)
4-8
Wire No. - \ \
\
\
\
\
\
\
\
These wires can be
interchanged.
(Wire No. can be
3,4 or 7,8 or 11,12)