Yokogawa EJX530B - Manual (Page 63)

<9. Maintenance>
9-4
IM 01C27F01-01EN
9.4.1 Replacing the Integral Indicator
This subsection describes the procedure for
replacing an integral indicator. (See figure 9.2)
■ Removing the Integral Indicator
1) Remove the cover.
2) While supporting the integral indicator with one
hand, loosen its two mounting screws.
3) Dismount the integral indicator from the RF
assembly.
When doing this, carefully pull the integral
indicator straight forward so as not to damage
the connector pins between it and the RF
assembly.
■ Attaching the Integral Indicator
1) Align both the integral indicator and RF
assembly connectors and engage them.
2) Insert and tighten the two mounting screws.
3) Replace the cover.
Zero-
adjustment
screw
RF assembly
CPU assembly
Amplifier cover
Mounting screw
Integral
indicator
Boss
Stud
F0902.ai
Press
forward
Power
cable
Zero-adjustment
screw pin
Figure 9.2 Removing and Attaching Integral
indicator, RF assembly and CPU
Assembly
9.4.2 Replacing the RF Assembly
This subsection describes how to replace the RF
assembly (see Figure 9.2).
■ Removing the RF assembly
1) Remove the cover.
2) Remove the integral indicator (refer to
subsection 9.4.1).
3) Remove the two stud bolts by using a socket
driver (width across flats: 5.5 mm).
4) Disconnect the RF assembly from the CPU
assembly. When doing this, carefully pull the RF
assembly straight forward so as not to damage
the connector pins between it and the CPU
assembly.
5) Disconnect the antenna cable that connects the
RF assembly and the antenna.
NOTE
Be careful not to apply excessive force to the
RF assembly and the connector of the antenna
cable when removing it.
■ Mounting the RF assembly
1) Connect the antenna cable between the RF
assembly and the antenna.
2) Align both the RF assembly and CPU assembly
connectors and engage them.
3) Tighten the two stud bolts.
4) Mount the integral indicator (refer to subsection
9.4.1).
5) Replace the cover.
9.4.3 Replacing the CPU Assembly
This subsection describes how to replace the CPU
assembly (see Figure 9.2).
■ Removing the CPU assembly
1) Remove the cover.
Remove the integral indicator and the RF
assembly (refer to subsections 9.4.1 and 9.4.2).
2) Turn the zero-adjustment screw to the position
as shown in Figure 9.2.
3) Disconnect the power cable (cable with brown
connector at the end).
When doing this, lightly press the side of the
CPU assembly connector and pull the cable
connector to disengage (see the upper left of
Figure 9.2).