Chapter 3. Service Precaution - Sharp UP-600 Service Manual

CHAPTER 3. SERVICE PRECAUTION

1. IPL (Initial Program Loading) FUNCTION
1) INTRODUCTION
The application software of the UP-600 written in the flash ROM.
In the following cases, writing procedure of the application software
into the flash ROM is required
•
When the flash ROM is replaced with new one. The service part
flash ROM does not include the application software in it.
•
When IPL writing is required because of change in the software.
The service part ofthe main PWB unit includes the flash ROM with
the application software written in it, and there is no need for
writing the application software when replacing the main PWB unit.
2) IPL PROCEDURE
There are two ways of IPL procedures.
•
IPL from P-ROM
•
IPL from PC communication (Please refer the next section)
The detailed descriptions on the above procedures are given below.
3) IPL FROM P-ROM
Master ROM-1 : VHI27801RA
Master ROM-2 : VHI27801RA
Before working on the installation, turn off the power switch on the
UP-600 and unplug the AC code from the AC outlet.
1. Insert a screwdriver into the slit on the right side of the lower
cabinet to remove the option RAM case.
2. IPL switch (SW301) on the IPL ROM PWB: Set the IPL switch
(SW301) to ON position.
3. Install to the IC sockets on the IPL ROM PWB.
ROM1
SW301
ROM2
ROM1 ROM2
on off
4. Turn on the power switch of the UP-600.
5. The following display is shown and the IPL procedure is started.
When the procedure is completed, the message of "Completed" is
shown.
IPL from PROM
Version check...
Erase ...
26 27 28 29 2A 2B
2C 2D 2E 2F 30 31
32 33 34 35 36 37
38 39 3A 3B 3C 3D
3E 3F
Verify ...
Completed.
6. Turn off the power switch of UP-600.
7. Remove to the IC sockets on the IPL ROM PWB.
8. IPL switch (SW301) on the IPL ROM PWB: Set the IPL switch
(SW301) to OFF position.
9. Perform the master reset.
IPL write start
IPL write completed