Hughes JVC 100, Service Manual

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Chapter 3---Service Adjustments
3-20 Model 100 Service Manual
18. The system has verified that the load module is correct and is ready to
update the Flash.
19. Press Enter to perform the update (press Esc now to abort the update with
no changes). While the Flash memory is being updated (15-30 seconds),
CAUTION:
DO NOT turn off the projector circuit
breaker or the machine could be made unbootable, requiring a new
set of flash chips to be installed. When the update is complete, the
system will display the following:
Reprogramming Flash Sector 0 1
Boot Manager software update successful
Command: _
20. The Boot software has been successfully updated. To restart the projector
under control of the updated boot manager, enter the "reboot" command
while depressing the service mode switch (see Figure 5-1). The projector
will now restart with the updated boot manager software. (NOTE: If normal
software starts, see Step 9 to reenter Boot Manager.) You should see the
following displayed, where y.y.0 is the updated Boot Manager's version.
Boot Manager Ver y.y.0 (Service Mode Startup)
Copyright (c) 1994-1996 Hughes-JVC Technology
Command: _
To update the System Software:
21. From the Boot Manager prompt, type in the command “loadsys”. At the
prompt, the following should be displayed:
Command: loadsys
System software update procedure
***WARNING: IMPROPER USE MAY MAKE THIS SYSTEM
UNBOOTABLE*** (NOTE: This warning relates to the
Flash Memory updating that occurs in Step 12D
below. Do not turn projector power off while the
Flash Memory is updating.)
Memory buffer reset to Oxff
Begin your S-Record upload now (Esc to abort)
22. Select “Transfers/Send Text File” from the Windows Terminal Menu
(normally in Accessories window). In the “Send Text File Dialog” box,
select “List Files of Type: All Files *.*” and select the disk and/or directory
with the Model 100 software. Select file named “zsys.hex”. Press OK to
start upload.
23. During upload, a progress indicator updates the number of records received.
When the upload is complete, the system will display the following