Sharp 4T-B70CJ1U Service Manual page 28

Defective symptom
The TV sometimes makes a
crackingsound.
Some Internet functions used on
a PC
are not available from the TV.
No sound
When the setting of the backlight
is set to the setting other than the
maximum setting(+16) and the
display screen is seen through
the camera, the flicker appears.
Cautions regarding use in high and low temperature environments
Whentheunitisusedinalowtemperaturespace(e.g.room,office),thepicturemayleavetrailsorappearslightlydelayed.
-
Thisisnota malfunction, and the unit will recover when the temperature returns tonormal.
Donotleavetheunitinahotorcoldlocation.Also,donotleavetheunitinalocationexposedtodirectsunlightornearaheate
-
r,asthis may cause the cabinet to deform and the front panel tomalfunction.
Storage temperature: -4°F to +140°F (-20°C to +60°C)
- This is not a malfunction. This happens when the cabinet slightly
expands and contractsaccording to change in temperature. This does
not affect the Monitor's performance.
- The TV has only limited functions compared with regular PC browsers.
Is connection to other componentscorrect?
-
Is the volume toolow?
-
Is "Variable" selected in "Audio OutputSelect"?
-
Have you pressed MUTE on the remote controlunit?
-
Check the audio output of the connected external equipment. Is the
-
volume too lowor muted?
When external equipment is connected via an HDMI cable, you may
-
need to configurethe
audio to be output through the HDMI cable.
The symptom occurs because the factory setting(Standard mode) of the
backlight is (+8). The backlight control is controlled by PWM dimming
(pulse dimming), and if the setting of the backlight is lowered, the period of
the pulse decreases and it interferes with the shutter cycle of the camera.
Set the backlight setting to the maximum (+16) by "Picture settings"
-
menu.
4T-B70CJ1 TROUBLE SHOOTING
Action
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