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ViewSonic PJ751
Problem Diagnostics
Before requesting repair, please check the following chart. If the situation cannot be corrected, then
contact your dealer.
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.
Phenomenon Cases not involving a machine
defect
Items to be confirmed
The power does not
come ON.
The main power source is not ON. Turn on the main power.
The electrical power cord is not
plugged in.
Correctly connect the power cord.
The main power source has been
interrupted during operation, such as
by a power outage (blackout), etc.
Be sure to press the “O” (power OFF) sideof
the main power switch, and leave it OFF for
approximately 20 minutes. After the unit
has sufficiently cooled, turn ON the power
source.
No sound or
pictures are
displayed
The input changeover settings are
mismatched.
Select the input signal then correct the set-
tings.
The input changeover settings are
mismatched.
Correctly re-connect the connection cord.
No signal is being inputted. Correctly re-connect the connection cord.
Pictures are
displayed, but no
sounds are heard
The electrical wiring to this unit is not
correctly connected..
Correctly re-connect the connection cord.
The volume setting has been set at
(or adjusted to) an extremely low
level.
Adjust the VOLUME setting to a higher
level.
Mute is turned on. Press the MUTE button to toggle the MUTE
mode setting.
Sounds are heard,
but no pictures are
displayed
The electrical wiring to this unit is not
correctly connected.
Correctly re-connect the connection cord.
The brightness setting has been set
at (or adjusted to) an extremely low
level.
Adjust the BRIGHT setting to a brighter
level.
The lens cap has not been removed. Remove the lens cap.
Colors have a faded-
out appearance.
Color tone is poor
Color depth setting or color tone set-
ting
Perform picture adjustments by changing
the COLOR BAL R, the COLOR BAL B,
and/or the TINT settings, etc.
Pictures appear dark The brightness setting and/or con-
trast setting has not been properly
adjusted.
Perform picture adjustments by changing
the BRIGHT and/or CONTRAST settings,
etc.
The WHISPER mode is the current
setting.
Toggle from the WHISPER mode.
Lamp is approaching the end of its
product lifetime.
Replace the Lamp Assembly.
Pictures appear
blurry
Either the FOCUS setting or the H
PHASE is not properly adjusted.
Adjust the focus and H PHASE settings.