Chapter3. User Handling Unit Service Manual
3-14
© 2013
Nautilus Hyosung Inc.
All Rights Reserved.
Encryption PIN Pad
► EPP(Encrypted PIN Pad) is a device that encrypts sensitive data such as customers’
card information and passwords, which requires the highest level of security, and
transmits it to the Host. Therefore, if EPP problem occurs in the field, verify the
problem and replace the entire unit. You cannot disassemble the internal components
or replace them individually.
The following figure is the back of the EPP. The functions and roles of each part are
summarized as below.
No
Label
Setting
Description
Remarks
1
LED1
Red
Serial Reception RX
Common for
USB/Serial
2
LED2
Green
Serial Transmission TX
Common for
USB/Serial
3
LED3
Red
Flickering at one-second intervals
during normal operation of EP
Common for
USB/Serial
4
LED4
Red
NVRAM CLEAR
Common for
USB/Serial
5
LED5
Green
Power LED
Common for
USB/Serial
6
SW1
No. 1
OFF
NVRAM CLEAR during ON
Common for
USB/Serial
No. 2
OFF
USB Communication during ON
Serial Communication during OFF
Common for
USB/Serial
7
J2
OPEN
Boot firmware download is
available for CLOSE.
Common for
USB/Serial
8
CN1
-
Power Connector
Common for
USB/Serial
9
CN2
-
Serial Connector
Common for
USB/Serial
10
CN10
-
USB Connector
Common for
USB/Serial
