SHARP ERA-220 ELECTRONIC CASH REGISTER - HOW TO ENTER SERVICE MODE - ERROR CODES - RESET - SELF DIAGNOSTIC FUNCTION - POWER SUPPLY SCHEMATIC

SERVICE MODE

Before turning the mode switch from the (SRV’) to (SRV), make sure the AC power cord is connected to the wall outlet; otherwise, the data on memory might be destroyed.

SRV. Reset (Program Loop Reset)

Used to return the machine back to its operational state after a lock-up has occurred.

• Unplug the AC cord from the wall outlet.
• Set the mode switch to (SRV’) position.
• Plugin the AC cord to the wall outlet.
• Turn to (SRV) position from (SRV’) position.

PROGRAM RESET ****

Master reset (All memory clear)

Used to clear all memory contents and return machine back to its initial settings. return keyboard back to default. for default keyboard layout.

• Unplug the AC cord from the wall outlet.
• Set the MODE switch to the (SRV’) position.
• Plugin the AC cord to the wall outlet.
• While holding down JOURNAL FEED key, turn to (SRV) position from (SRV’) position.

MASTER RESET ****

To start the diagnostic program, you must enter the following command.

3-digit test item number key in the SRV mode

The RAM must be operating properly to go into this mode. This is necessary because the control jumps to the program area in the SRV mode. A master reset must be performed before operating the ECR for the first time. After any option is installed, a program reset is required. When the master reset or program reset is performed, be sure to check the printout on the journal paper.

Master reset : Turn power on in the SRV’ mode and change it to the SRV mode with the PAPER FEED key pressed.

print : MASTER RESET ***

Program reset : Turn power on in the SRV’ mode and change it to the SRV mode.

print : PRG. RESET ***

With the SRV mode and the following test code entry, the test start

Cautions to be taken when removing the upper cabinet.

When removing the upper cabinet, first remove the printer cover and then remove the upper cabinet from the let side, as shown.

Cautions to be taken when installing the pop-up display connector cable.

Exercise care not to have the wrong direction of the pop-up display connector cable when connecting the cable to the Key I/F connector CN14.

When connecting the cable, make sure:

The cable is not kinked.

The cable contact surface points upward against the PWB when inserting the cable.

MAIN POWER SUPPLY SCHEMATIC

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ERROR CODES