JVC 250 Service Manual page 171

Chapter 8---Software and Protocol
12A. To update the System Software from the Boot Manager prompt:
12B. Type in the command "loadsys" at the prompt. The following should be
displayed:
12C. 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 250 software. Select file named "zsys.hex". Press OK to
start upload. Uploading takes about 20 minutes (9600 bps)
12D. During upload, a progress indicator updates the number of records
received. When the upload is complete, the system will display the
following (numerical values are for example only and depend on the
System Software version):
12E. At this point the system has verified that the load module is correct and
is ready to update the Flash memory. Press Enter to perform the update
(Esc will abort the update process with no changes). While the Flash is
being updated (approx. 15-30 seconds), DO NOT turn off the projector
circuit breaker, this may make the machine unbootable, requiring a new
set of flash chips to be installed. When the update is complete, the system
will display the following:
8-4
Boot Manager Ver y.y.0 (Service Mode Startup)
Copyright (c) 1994-1996 Hughes-JVC
Technology
Command: _
Command: loadsys
System software update procedure
***WARNING: IMPROPER USE MAY MAKE THIS
SYSTEM UNBOOTABLE*** (NOTE: This warning
relates to the Flash
in Step 12D below. Do not
off while the Flash Memory is
Memory buffer reset to Oxff
Begin your S-Record upload now (Esc to abort)
S-Records processed:11282
Upload Successful
Address Range: 0x00020000-0x000781cf
Bytes Loaded:360912
***WARNING: FLASH WILL NOW BE UPDATED***
Press Enter to continue, Esc to abort
Reprogramming Flash Sector 2 3 4 5 6 7 8 9
System software update successful
Command: _
Memory updating that occurs
turn projector power
updating.)
Model 250 Service Manual