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EN 26
5.
L12M3.1L LA
5.6.3
No Picture
When you have no picture, first make sure you have entered
the correct display code.
See
Display Option Code Selection
5.6.4
Unstable Picture via HDMI input
Check (via ComPair) if HDMI EDID data is properly
programmed.
5.6.5
No Picture via HDMI input
Check if HDCP key is valid. This can be done in CSM.
5.6.6
HDMI CEC Not Functioning
Go to Home/Menu ->Setup -> Installation -> Preference and
set the Easylink option to "on". Also check if the connected
device is CEC enabled.
5.6.7
TV Will Not Start-up from Stand-by.
Possible Stand-by Controller failure. Reflash the SW.
5.6.8
Cannot measure 1 kHz signal at tweeter 1D01 connector
This is normal behavior. Sound system is active 2.1 system
with separate tweeter and subwoofer paths. Use 8 kHz test
signal for tweeter measurement.
5.6.9
Low output measured at tweeter 1D01 connector
This is normal behavior. Tweeter only covers higher frequency
for rated power (4 W each), whereas the subwoofer output
(1D02 connector) is full range coverage for output power of 12
W.
5.6.10 No sound output at class D amplifier
Check following points:
•
Presence of both supply +V
2
•
I
S input signal: pins 15, 20, 21, 22
- pin 15: MCLK = 12.288 MHz
- pin 20: LRCLK = 48 kHz
- pin 21: SCLK = 3.072 MHz
- pin 22: SDIN = audio data.
2
•
Check I
C communication: pins 23 and 24
•
Check startup GPIO: pins 19 and 25; for normal operation,
both should be HIGH
•
Check outputs: pins 1, 36, 39 and 46; all should have a
12 V PWM signal with a switching frequency of 384 kHz.
5.6.11 Front-end: no picture in analog RF mode
Check following points:
•
Tuner supply voltage (3V3) presence available at pin 2/4
7216 and F203
2
•
I
C lines are working correctly (3V3)
•
Manually store a known channel and check if there is IF
output at tuner pins 7 & 8; if not, tuner may be faulty
•
Check whether picture is present in CVBS; in not, check
Video section.
5.6.12 Front-end: no picture in digital RF mode
Check following points:
•
Tuner supply voltage (3V3) presence available at pin 2/4
7216 and F203
2
•
I
C lines are working correctly (3V3)
2013-Jun-21
Service Modes, Error Codes, and Fault Finding
for the instructions.
(12 V) & 3V3D (3.3 V)
SND
•
Manually store a known channel and check if there is IF
output at tuner pins 2& 3; if not, tuner may be faulty
•
Supply voltage (1V2, 2V5, 3V3) presence available to
digital demodulator 7210
•
Correct functioning of crystal 1205 (41 MHz)
•
Pin DEMOD_RST is HIGH in normal operation
•
Transport stream output from 7210 is available; if yes,
check Video section.
5.6.13 USB troubleshooting
•
USB hub does not work when it is plugged in to USB2 and
-3.
-> Connect USB hub to USB1 (only this port supports hub)
•
TV cannot detect the presence of USB devices.
-> USB device maybe faulty, replace with another USB
device.
•
TV cannot detect the presence of USB devices.
-> Ensure USB device connected to the TV USB input ports
comply with USB standard (USB certified).
•
TV sometimes can/cannot detect USB devices.
-> If connected to a passive USB hub, remove the passive
USB hub.
-> Devices connected to a passive USB hub may have
drawn current exceeding 500 mA (= limit from TV USB
port).
5.6.14 Ethernet troubleshooting
•
Ethernet cannot establish link.
-> Check the ethernet magnetic that it is stuffed with the
correct orientation.
•
When connected to computer, the speed indicated on the
computer screen is 10 Mbps instead of 100 Mbps.
-> Check the computer network properties setting and
ensure that it is set to "Auto".
•
Unable to login to NetTV website.
-> Make sure all of the keys are loaded in e.g. MAC
address, ECD key, etc.
5.6.15 HDMI troubleshooting
•
TV cannot detect the presence of HDMI source.
-> Check if there is +5 V at pin 18 of HDMI connector.
•
No picture on TV screen.
-> Make sure HDCP is valid.
•
In PC mode, TV is unable to display picture for certain
output resolutions.
-> Check TV specification if the TV can support the
selected resolution.
•
CEC not functioning.
-> Turn on "Easyliok" feature from the TV menu.
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