Epson EPL-5500, Service Manual

Page: 36 / 145

1.4.3 Service Mode
This printer has the following four service modes:
❏ Hexadecimal dump mode
❏ EEPROM format mode
❏ Factory reset mode
❏ Default setting mode
Each service mode can be activatted selectively, by turning the printer on while hold down the
button and release it at the corresponding timing shown in table below.
Table 1-13. Service Mode Select Timing
Order Pattern
LED
(Yellow)
LED
(Red)
Mode
1
Pattern 0-0
ON ON
NA
2
Pattern 0-1
OFF OFF
NA
3
Pattern 1
ON OFF
Hexadecimal dump mode
4
Pattern 2
OFF ON
EEPROM Initialize mode
5
Pattern 3
ON OFF
Factory reset mode
6
Pattern 4
OFF OFF
Default setting mode *1
*1: Can be performed by the user.
1.4.3.1 Hexadecimal Dump Mode
Hexadecimal dump mode is a useful tool in troubleshooting data control problems. To enter
hexadecimal dump mode, release the button at the mode select timing "Pattern-1". To quit the
hexadecimal dump mode, turn off the printer or perform the warm-boot operation.
1.4.3.2 EEPROM Initialize Mode
EEPROM initialize operations are required only when the main board or EEPROM is replaced and
these operations are specified in the accompanying documentation.
This mode resets all user settings to the factory default settings and clears the printer status
information (page counter and jam counter). To perform EEPROM initialize mode, release the
button at the mode select timing "Pattern-2" and press the bottun again within 2 seconds from the
release. The LED lights flashes alternately during the initialization. If the button is not pressed
within 2 seconds after release, the printer enters nomal state without initialize operation.
1.4.3.3 Factory Reset Mode
The factory reset mode resets the printer settings to the factory default settings (the page counter
and jam counter are not cleared). To enter factory reset mode, release the button at the mode select
timing "Pattern-3" and press the button again within 2 seconds after release. The LED lights flashes
alternately during the reset operation. If the button is not pressed within 2 seconds after release, the
printer enters the nomal state without reset operation.
EPL-5500 Service Manual General Description
Rev. B 1-23