VIEWSONIC PJ650/PJ520 - Manual (Page 40)

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
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. points.
The main power source has
been interrupted during opera-
tion, such as by a power out-
age (blackout), etc. Be sure to press the “O” (power OFF) side of the main power
switch, and leave this OFF for approximately 20 minutes. After
the unit has sufficiently cooled down, turn ON the power
source.
No sound or pic-
tures are outputted
The input changeover settings
are mismatched. Select the input signal, and correct the settings.
The input changeover settings
are mismatched. Correctly connect the connection cord.
No signal is being inputted. Correctly connect the connection cord.
Pictures are dis-
played, but no
sounds are heard
The electrical wiring to this
unit is not correctly connected. Correctly 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 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 setting 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
contrast 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. Repalce 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.
ViewSonic PJ650/PJ520 37