Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 137)

<11.Inspection and Maintenance>
11-8
IM 11M12A01-04E
11.2 Inspection and Maintenance of the Converter
The converter does not require routine inspection and maintenance. If the converter does not work
properly, in most cases it probably comes from problems or other causes.
11.2.1 Replacing Fuses
This equipment incorporates a fuse. If the fuse blows out, turn off the equipment power and replace it
in the following procedure.
CAUTION
If a replaced fuse blows out immediately, there may be a problem in the circuit. Check the circuit
carefully to find out why the fuse has blown.
Before removing the electronics, touch the grounded metal part to discharge any static electricity.
(1) Remove the display cover (Figure 11.5).
(2) Remove the three screws that are located toward you, among the four screws shown in Figure
11.6. Loosen the remaining one.
(3) Move the electronics up to remove it.
F11.5E.ai
Cover of Display
F11.6E.ai
SCREW
Figure 11.5 Cover of Display Figure 11.6 Location of Screw
(4) Disconnect the three connectors from the printed-circuit board, as shown in Figure 11.7, by
holding the connector housing. Do not pull the leadwire out to remove the connectors, otherwise,
disconnection may result.
(5) Remove the electronics completely to gain access to the fuse on the bottom of the equipment
case (Figure 11.8).
(6) Replace the fuse with a new one.
F11.7E.ai F11.8E.ai
Figure 11.7 Locations of Connectors Figure 11.8 Location of Fuse