Epson TM-FX2180 manual Sensors, Sensor Test Points

EPSON FX-2180 Service Manual Chapter 3 Troubleshooting

3.2.2Sensors

Table 3-2. Sensor Test Points

Sensor	Test Pin	Test Method		Meter Reading
Connector	Numbers	(Set the meter to DC
		voltage.)
CN4	1: HP	Place one lead on pin 1 and	∙	Open: +5 V
(HP sensor)	2: GND	the other lead on pin 2.		(home position)
	3: +5 V	Check the resistances while	∙	Short: 0 V
		blocking the two sensor		(not in home
		terminals.		position)
CN5	1: +5 V	Place one lead on pin 2 and	∙	Open: +5 V
(rear PE	2: PE	the other lead on pin 3.		(Paper is loaded.)
sensor)	3: GND	Check the resistances while	∙	Short: 0 V
		toggling the rear PE sensor		(No paper is
		lever.		loaded.)
CN6	1: PE	Place one lead on pin 1 and	∙	Open: +5 V
(front PE	2: GND	the other lead on pin 2.		(Paper is loaded.)
sensor)		Check the resistances while	∙	Short: 0 V
		toggling the front PE sensor		(No paper is
		lever.		loaded.)
CN7	1: E	Place one lead on pin 2 and	∙	Open: 0 V
(TOP sensor)	2: GND	the other lead on pin 3.		(No paper is
	3: +5 V	Check the resistances while		loaded.)
	4: A	inserting and removing paper	∙	Short: +5 V
		between the platen and the		(Paper is loaded.)
		sensor.

Table 3-2. Sensor Test Points (Continued)

Sensor	Test Pin	Test Method		Meter Reading
Connector	Numbers	(Set the meter to DC
		voltage.)
CN12	1: Release 1	1. Place one lead on	∙	Open: +5 V
(paper release	2: GND	pin 1 and the other	∙	Short: 0 V
sensors 1 and 2)	3: Release 2	lead on pin 2. Check
	4: GND	the resistances
		while toggling the
		paper release lever.
		2. Place one lead on
		pin 3 and the other
		lead on pin 4. Check
		the resistances
		while toggling the
		paper release lever.
CN13	1: PG 1	Place one lead on pin 1	∙	Open: +5 V
(PG sensors 1	2: GND	and the other lead on	∙	Short: 0 V
and 2)	3: PG 2	pin 2. Check the
	4: GND	resistances while
		toggling the PG sensor
		lever.
CN2 on the	1: COPEN	Place one lead on pin 2	∙	Open: +5 V
control panel	2: GND	and the other lead on		(The cover is
board		pin 3. Check the		open.)
(cover open		resistances while	∙	Short: 0 V
sensor)		toggling the cover open		(The cover is
		sensor lever.		closed.)

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