Chapter 6. Ipl From Ep-Rom - Sharp XE-A402 Service Manual

CHAPTER 6. IPL FROM EP-ROM

Before working on the installation, unplug the AC cord from the AC out-
let.
1. Open the top cabinet.
2. Set the IPL switch (S1) to VCC position.
3. Install the IPL ROM to the IC socket of the MAIN PWB.
4. Turn the mode key switch to PGM position, and insert AC plug in
AC outlet.
5. The IPL procedure is started.
When the procedure is completed, the message of "Completed." Is
shown.
P ROM COPY
Completed.
GND
VCC
S1
IPL switch
IPL ROM
1pin
XE-A402 IPL FROM EP-ROM
– 14 –
6. Unplug the AC cord from the AC outlet.
7. Remove the IPL ROM to the IC socket of the MAIN PWB.
8. Set the IPL switch (S1) to GND position.
9. Replace the top cabinet.
10. Perform a master reset.
While holding down Journal feed key and CL key, insert AC cord in
AC outlet.
MRS.
PC-UM10M
GND
VCC
S1
IPL switch