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 is written in the flash ROM.
In the following cases, writing of the application software into the flash
ROM is required.
•
When the flash ROM is replaced with a new one. The service part
flash ROM does not include the application software in it.
•
When IPL writing is required because of a change in the software.
The service part of the 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 for the IPL procedures.
•
IPL from P-ROM
•
IPL from PC communication (Please refer to the next section)
The detailed descriptions on the above procedures are given below.
3) IPL FROM P-ROM
Master ROM-1 : VHI27801RAS1A
Master ROM-2 : VHI27801RAT1A
Before installation, turn off the power switch on the UP-600 and un-
plug the AC cord 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 the ON position.
3. Install the ROMs into the IC sockets on the IPL ROM PWB as
shown below.
ROM1
SW301
ROM2
ROM1 ROM2
on off
4. Place the mode key to any position except OFF or SRV'.
5. Turn on the power switch of the UP-600.
6. 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.
7. Turn off the power switch of UP-600.
8. Remove to the ROMs from the IPL ROM PWB.
9. IPL switch (SW301) on the IPL ROM PWB: Set the IPL switch
(SW301) to the OFF position.
10. Perform one of the master reset procedures.
IPL write start
IPL write completed