Epson 9600, 7600 Outline of Power Supply Circuit Board, Fuse Rating, Signal Name Function

EPSON Stylus Pro 7600/9600 Revision A

2.4 Outline of Power Supply Circuit Board

The 100 V AC power from the wall outlet is supplied via the power cable, an accessory of Stylus Pro 7600/9600, into the Inlet of the printer and to the Power Supply Circuit Board.

The power switch constitutes a secondary power switch system. The secondary power switch system operates as follows: even with the power switch turned off, the Power Supply Circuit Board is operating by a slight power as long as the power cable is connected.

CAUTION Even after the power switch is turned off, the Power Supply Circuit Board does not stop operating immediately, but power is kept on

until the ink system ending sequence is completed.

Do not disconnect the power cable or do not shut off power by turning off any power switch other than that on the printer.

The Power Supply Circuit Board is equipped with a fuse for overcurrent protection. Table 2-9below indicates the rating of the fuse:

Table 2-9. Fuse Rating

Input Voltage Range [V AC]	Fuse Rating
100 +/– 10%	125 V AC / 6.3A

There are three control signals between the C472MAIN Board and the Power Supply Circuit Board. Table below describes details of the control signals:

Table 2-10. Control Signals between C472MAIN Board and Power Supply Board

Signal Name		Function
REM_ON	Operating	Turned ON/OFF by C472MAIN Board.
(MAIN→		• When these terminals are shorted, the drive system
Power Supply)		power supplies 28 VDC and 42 VDC are active.
	Off	• When these terminals are open (= L), the drive
		system power supplies 28 VDC and 42 VDC are 0
		VDC.
		• The 5 VDC power is not controlled with these
		terminals.
AC_OFF	Operating	When each output from the Power Supply Circuit
(MAIN←	(= H)	Board has become inactive because of turning off of
		the power switch or when the input voltage has
Power Supply)		dropped below the rated voltage value, “H” signal is
		sent to the C472MAIN Board.
	Off	The power switch is turned on and the Power Supply
	(= L)	Circuit Board Unit starts operating so that each output
		becomes active.
		“H” signal is sent to the C472MAIN Board.
POW_ON/OFF	Operating	Connected to the power switch on the Panel Unit.
(Panel /		• These terminals are shorted when the switch is ON.
		The Power Supply Circuit Board becomes active.
MAIN→Power
	Off	• These terminals are open when the switch is
Supply)
		OFF.The Power Supply Unit keeps operating for
		about ten and several seconds to a few minutes and
		then turns off.

Operating Principles Outline of Power Supply Circuit Board 120