Operation Principles; Power-On Sequence; Simple Reset Sequence - Epson Artisan 810 Service Manual

Epson Artisan 810/835/837/710/725/730/Epson Stylus Photo PX810FW/TX810FW/PX820FWD/TX820FWD/PX830FWD/PX710W/TX710W/PX720WD/TX720WD/PX730WD/TX730WD

8.2 Operation principles

This section describes information for Artisan 835/725/PX820FWD/TX820FWD/
PX720WD/TX720WD. For the information other than mentioned in this section, see
Chapter 2 "OPERATING PRINCIPLES"(p48).
The power-on sequence for Artisan 835/725/PX820FWD/
C H E C K
TX820FWD/PX720WD/TX720WD differs from that for the others
P O I N T
because it does not have the AID function.

8.2.1 Power-On Sequence

Initializing operations of this printer at power-on differ between when powered off
normally

(Simple Reset Sequence

(p255)) and when powered off abnormally
Sequence (p257)). This section describes how this printer operates in the Simple Reset
Sequence and in the All Reset Sequence under certain conditions.
In the following sections, simplified diagrams of the printer describe
C H E C K
operations in each sequence. See
P O I N T
for how to use the diagrams.
Artisan 835/725/PX820FWD/TX820FWD/PX720WD/TX720WD
(All Reset
" 2.2 Power-On Sequence (p.53)"
Operation principles
8.2.1.1 Simple Reset Sequence
This sequence is executed at power-on under the following conditions:
After powered off normally without any paper jam or fatal error.
At power-on, the CDR Tray is retracted, and the carriage is in the home
position.
This section describes the printer operations in the Simple Reset Sequence under the
following preconditions in Table 8-1 "Detailed Operations in Simple Reset
Preconditions
Set to PG- and the EJ Frame is down.
No paper is on the paper path.
Scanner Open Error is not occurring.
Duplex Unit is not installed.
CR Stopper is removed.
Initial ink charge is completed.
No ink cartridge is in either ink low or ink end status.
Table 8-1. Detailed Operations in Simple Reset Sequence
Operation
1. Check the Case Open Sensor/waste
ink over flow
1-1. Check the Case Open Sensor and
confirm the scanner is not open.
1-2. Readout the value of waste ink counter
to check if waste ink overflow is
occurring.
2. Seeking the home position
2-1. PF Motor rotates counterclockwise to
release the CR lock.
Revision G
Sequence".
PF Drive
Printer Operation Status Shift
Status
80 HP 0
PG++
PG-
6
80 HP 0
PG++
PG-
6
80 HP 0
PG++
PG-
6
(Continued to the next page.)
Confidential
Decom-
pression
Pump
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