ViewSonic PJ751 manual Problem Diagnostics, Come on

Problem Diagnostics

Before requesting repair, please check the following chart. If the situation cannot be corrected, then contact your dealer.

Phenomenon	Cases not involving a machine	Items to be confirmed
	defect
The power does not	The main power source is not ON.	Turn on the main power.
come ON.
	The electrical power cord is not	Correctly connect the power cord.
	plugged in.
	The main power source has been	Be sure to press the “O” (power OFF) sideof
	interrupted during operation, such as	the main power switch, and leave it OFF for
	by a power outage (blackout), etc.	approximately 20 minutes. After the unit
		has sufficiently cooled, turn ON the power
		source.
No sound or	The input changeover settings are	Select the input signal then correct the set-
pictures are	mismatched.	tings.
displayed	The input changeover settings are	Correctly re-connect the connection cord.
	mismatched.
	No signal is being inputted.	Correctly re-connect the connection cord.
Pictures are	The electrical wiring to this unit is not	Correctly re-connect the connection cord.
displayed, but no	correctly connected..
sounds are heard	The volume setting has been set at	Adjust the VOLUME setting to a higher
	(or adjusted to) an extremely low	level.
	level.
	Mute is turned on.	Press the MUTE button to toggle the MUTE
		mode setting.
Sounds are heard,	The electrical wiring to this unit is not	Correctly re-connect the connection cord.
but no pictures are	correctly connected.
displayed
	The brightness setting has been set	Adjust the BRIGHT setting to a brighter
	at (or adjusted to) an extremely low	level.
	level.
	The lens cap has not been removed.	Remove the lens cap.
Colors have a faded-	Color depth setting or color tone set-	Perform picture adjustments by changing
out appearance.	ting	the COLOR BAL R, the COLOR BAL B,
Color tone is poor		and/or the TINT settings, etc.
Pictures appear dark	The brightness setting and/or con-	Perform picture adjustments by changing
	trast setting has not been properly	the BRIGHT and/or CONTRAST settings,
	adjusted.	etc.
	The WHISPER mode is the current	Toggle from the WHISPER mode.
	setting.
	Lamp is approaching the end of its	Replace the Lamp Assembly.
	product lifetime.
Pictures appear	Either the FOCUS setting or the H	Adjust the focus and H PHASE settings.
blurry	PHASE is not properly adjusted.

NOTE:

When the interior becomes overheated, power to the unit automatically shuts down. Press the main switch on the side of the unit to the off position then wait 20 minutes to allow the unit to cool down before any work is done to the unit.

34 ViewSonic PJ751