Centek CT-8640 [32/40] From possible malfunctions be sure to turn off the power and disconnect the
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Centek CT-8640 [32/40] From possible malfunctions be sure to turn off the power and disconnect the

Centek CT-8640 [32/40] From possible malfunctions be sure to turn off the power and disconnect the
32
25. entering the teletext, pressing again - mixing (MIX) the teletext and the
TV picture, the third press - exiting the teletext.
26.
Click to display the teletext, click again to hide the teletext mode.
27.
SIZE: changing the size of the teletext screen in viewing mode.
28. SUBTITLE: press to select the subtitle language while watching DTV program.
SUBPAGE: click to turn the subpages on or off.
29.
INDEX: go to the main page. INDEX: in the MENU of the TV guide EPG -
sorting by timer or channels. Log in to the list of recordings (in DTV mode).
30. RADIO: Press to switch radio and TV programs (in DTV mode).
REVEAL - open the hidden information of some teletext pages.
31. S.MODE: sound setup
NOTE:
- Buttons, that have no description, are not used to control the TV.
- All pictures in this manual are only for example, the actual appearance of the
product may differ from the images.
5. TROUBLESHOOTING GUIDE
Troubleshooting
If there are malfunctions in the operation of the TV, try to turn it off and turn it on
again. For troubleshooting, you can also use the table below. If the malfunction
persists, contact technical specialists for help.
Problem Possible reasons Solution
No image, no sound, no
indicator light
1. The power cord is not
plugged in outlet
2. The power is off
1. Plug the cord into
an outlet
2. Turn on the power
The image and sound are
distorted
1. Contrast, sharpness and
color are set incorrectly
2. The color rendering
system is set incorrectly
3. The sound system is not
set correctly
1. Adjust the contrast,
sharpness and color
values
2. Install a color
rendering system
according to the
broadcasting standards in
the country
3. Install a sound
system according to the
broadcasting standards in
the country
The picture is spotted
or with snow
The signal source is
weak or the cable is of
bad quality
Use a good quality
cable
There is no image, no
sound and the indicator
is green/blue
The volume is at the
minimum value or the
TV is in mute mode
Adjust the volume
level
The cable through
which the signal
is transmitted is
connected incorrectly
Connect the signal
cable correctly
Blue screen, AV
inscription
There is no input
signal or the video
cable is not connected
or connected
incorrectly
Connect the video
cable correctly
The image is fuzzy or
flinches or with black
horizontal stripes (in
PC mode)
The PC image is
adjusted incorrectly
enter the "Screen"
menu, select
auto-tune to perform
automatic calibration
and adjust the phase
PC Image is not
entered
No sound
There is no incoming
audio signal or
the audio cable is
incorrectly connected
Connect the audio
cable correctly
PC picture with wrong
color
The color gamut is
incorrectly adjusted
by the user
Adjust the color
settings or reset
the color settings to
factory settings
The HDMI source shows
with snow and pixels
The signal source is
non-standard
Reconnect the HDMI
cable
The remote control
does not work
Batteries are
incorrectly installed
or their service life
has expired
1. Make sure that the
positive and negative
poles are correctly
oriented.
2. Check if there is
contact between
the battery and the
spring
3. Replace the
batteries
6. CARE
Thorough and regular cleaning can prolong the life of your new TV and save you
from possible malfunctions. Be sure to turn off the power and disconnect the
power cord before starting any cleaning. Clean the appliance only with a dry cloth.
7. SPECIFICATIONS
Net/Gross Weight (kg) 5,8/7,2
VESA mount type 200х200/М6
Active screen size 40’’
Screen size ratio 16:9
Resolution 1920х1080
Frame rate (Hz) 60
Brightness (type: cd/m2) (nit) 220
Contrast ratio (standard) 5000:1
Viewing angles (L/R) 170
О
/170
О
Response time (TR+TF/TYPE) (ms) 9,5
Number of colors 16.7 M (8-BIT)
Side panel HDMI, RF, CI, Mini AV, COAX
Bottom panel 2х HDMI
Operating system Non-OS
Central processor (CPU) MSD3663
DDR memory capacity 128
Flash memory (GB) 8
Reception frequency range 43.25 MHz – 867.25 MHZ
Input resistance 75Ω
Video standards PAL/SECAM
Max. number of channels 100
Digital tuners DVB T/T2/C
Image modes Home, Vivid, Standard, Soft,
Custom
3D comb filter yes
Dynamic noise reduction yes
Balance yes
Stereo NICAM/A2

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