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SOFTWARE UPDATE PROCEDURE (continued)
7.3
Trend Assembly Firmware Replacement
The firmware chip on the Trend assembly is located on the CRT Controller
circuit board and is designated U20. See Figure 7-3. Access to the chip requires
removal of the Trend assembly from the machine.
Parts Required:
7.3.1 Set the System Power switch to STANDBY and remove AC power from
the machine.
CAUTION:
7.3.2 Disable the three circuit breakers on the primary power supply by
pulling out each button with a knife or sharp object.
7.3.3 Remove the Trend assembly from the monitor housing as outlined in
Section 4.
7.3.4 Carefully remove the firmware chip from the circuit board.
7.3.5 Insert the replacement firmware chip into the socket. Be sure that the
chip is oriented as shown in the illustration with its notch toward the
front of the assembly.
7.3.6 Reinstall the Trend assembly in the monitor housing.
7.3.7 Reset the circuit breakers on the primary power supply.
7.3.8 Restore power to the machine and turn the System Power Switch to
ON.
7.3.9 Verify that all CRT functions are working correctly.
7.3.10 Turn the System Power switch to STANDBY.
7.3.11 Perform the PMS Procedure given in Section 6.
RETURN TO THIS MANUAL'S TABLE OF CONTENTS
RETURN TO CD-ROM TABLE OF CONTENTS
Trend Mon CRT
Ver x.xx 4108436
Use ESD protection when servicing any of the assemblies
inside the monitor housing.
7-6
NM3
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