Service manual

EPSON Stylus Photo R1900/R2880/R2000 Revision E
Operating Principles PG Setting 31
Confidential
2.4 PG Setting
As this printer uses an Auto PG (APG), an appropriate PG position is set according to the used paper type.
The following table indicates the PG positions, the main applications of each position, and the relationships between the two sensors used with the APG.
Note "*": The signal output is “High” while the PG positions are changed.
Table 2-4.
Application
PG Position
PG (– –) PG (–) PG (Typ) PG (+) PG (++) Release
Printing • Photo paper
(A4,Letter)
• Roll paper
• Photo Matte paper
• Plain paper
• Exclusive paper
• PG (-) rub avoidance
• Envelope
• PG (Typ) rub avoidance
• CD/DVD
–
Non-printing
––
• Standby position after
power-on (When the
CDR Tray Base is
closed.)
• At power-off
• Ink Mark Sensor reading.
(Auto Bi-D)
• Ink Mark Sensor reading.
(Detection of dot
missing)
• Initialization at power-on
• Cleaning (wiping)
• Ink Cartridge
replacement
• Standby state for CD/
DVD feeding
• Paper jam removal
PG value 1.05mm 1.20mm 1.70mm 2.10mm 4.50mm –
Sensor PG (– –) PG (–) PG (Typ) PG (+) PG (++) Release
APG Sensor 1* Low Low Low Low Low Low
APG Sensor 2 Low Low Low Low High High