Sharp ER-A520 Service Manual - Page 22

CHAPTER 6. IPL FROM EP-ROM Before installation, unplug the AC power cord from the AC outlet. 1. Open the top cabinet. 2. Set the IPL switch (S1) to ROM COPY position. 6. Unplug the AC power cord from the AC outlet. 7. Remove the IPL ROM from to the IC socket of the MAIN PWB. 8. Set the IPL switch (S1) to GND position. ROM COPY GND VCC S1 S1 IPL switch ROM COPY GND VCC S1 S1 IPL switch 3. Install the IPL ROM in the IC socket of the MAIN PWB. 9. Replace the top cabinet. 10. Perform the master reset. Turn the mode key switch to the SRV' position, insert the AC power cord into the AC outlet. While holding down the Journal feed key, turn the mode key from the SRV position to the SRV' position. pin-1 IPL ROM 4. Turn the mode key switch to SRV' position, and insert the AC power cord into the AC outlet. 5. Turn the mode key switch to SRV position. The IPL procedure is started. When the procedure is completed, the message of "Completed" is shown. ER-A520U/ER-A530U IPL FROM EP-ROM - 21 -