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Service Modes, Error Codes, and Fault Finding
EN 32 Q549.2E LA5.
2009-May-08
look for item “DisplayRawNumber” in the beginning of the
logging. Tip: when there is no picture available during rebooting
you are able to check for “error devices” in the logging (LAYER
2 error) which can be very helpful to determine the failure cause
of the reboot. For protection state, there is no logging.
5.8.7 Loudspeakers
Make sure that the volume is set to minimum during
disconnecting the speakers in the ON-state of the TV. The
audio amplifier can be damaged by disconnecting the speakers
during ON-state of the set!
5.8.8 IPB
In case of no picture when CSM-test pattern from PNX5100 is
activated and backlight doesn’t light up, it’s recommended first
to check the inverter on the IPB + wiring (LAYER 2 error = 17
is displayed in SDM).
5.8.9 Tuner
Attention: In case the tuner is replaced, always check the tuner
options!
5.8.10 PCI bus
The splash screen image is not distributed via the regular YUV
signal path from the PNX8543 to the PNX51XX, but loaded one
time via the PCI bus.Once the splash screen image is loaded
into the PNX51XX, it will be continuously generated by the
PNX51XX until the first incoming video disables the splash
screen.So when teletext and/or general UI is available, but no
splash screen (option “ON”) is visible during start-up, check the
PCI bus as possible root cause.
5.8.11 Display option code
Attention: In case the SSB is replaced, always check the
display option code in SAM, even when picture is available.
Performance with the incorrect display option code can lead to
unwanted side-effects for certain conditions.
5.8.12 Upgrade HDMI EDID NVM
The EDID MUX device (including all HDMI NVM except the 4th)
is upgradeable via USB, see ComPair for further instructions. It
should be noted that in case a new spare EDID MUX device is
used for repair, the initial default address must be changed
from “C0” to “CE”, to be done via ComPair.
5.8.13 Upgrade VGA/4th HDMI EDID NVM
The EDID for VGA connector or the 4th HDMI can only be
upgraded via external I
2
C. To upgrade the EDID for the VGA
connector or 4th HDMI, pin 7 of the EDID NVM has to be short
circuited to ground. Therefore a test point is foreseen (see
Figure 5-13
). For the VGA EDID NVM it’s most suitable to
connect pin 7 to ground on the NVM device itself. See ComPair
for further instructions.
Figure 5-13 4th HDMI EDID NVM pin
5.8.14 Wi-Fi module
To prevent damage on the coax wires, especially the female
core of the coax wires (can be bend over during dis- and
reconnecting), this should be carried out by use of pliers.
18310_220_090318.eps
090319
EDID4