Service Modes, Error Codes, and Fault Finding
EN 19
LC4.31E AA
5.
5.7.2
Load Default NVM Values
In case a blank NVM is placed or when the NVM content is
corrupted, default values can be downloaded into the NVM.
(For empty NVM replacement, short the SDM with a jumper
and apply the mains voltage. Remember to remove the jumper
after the reload is completed). After the default values are
downloaded, it will be possible to start up and to start aligning
the TV set. This is no longer initiated automatically; to initiate
the download the following action has to be performed:
1.
Switch “off
”
the TV set by disconnecting the AC Power
plug.
2.
Short circuit an SDM jumper (keep short-circuited).
3.
Press P+ or Ch+ on the local keyboard (and keep it
pressed).
4.
Switch on the TV set via the AC Power plug.
5.
Keep pressing the P+/Ch+ button until the set has started
up and the SDM is shown.
Alternative method:
1.
Go to SAM.
2.
Select NVM Editor (not SC NVM Editor).
3.
Select ADR (address) to 1 (dec).
4.
Change the VAL (value) to 170 (dec).
5.
Store the value.
6.
Disconnect the mains plug and wait for a few seconds.
7.
Reconnect the mains plug and wait until the set goes into
its standby mode (red LED lights up).
8.
Restart the set.
5.7.3
Flash New Scaler Software
When you need to flash new scaler software, follow the
instructions in ComPair. Make sure you put the set in one of the
Service Modes, SDM/SAM/CSM, before you start flashing.
This reduces the risk of the set hanging during the flashing
procedure.
5.7.4
Tuner and IF
No Picture in RF Mode, but there is a Noise Raster
1.
Check whether picture is present in AV. If not, go to Video
processing troubleshooting section.
2.
If present, check if the Option settings are correct.
3.
Check if all the supply voltages are present
(3.3/5/8/12/33 V).
4.
Check if the I
2
C lines are working correctly (3.3 V).
5.
Manually store a known channel and check if there is IF
output at Tuner pin 11.
6.
Check the tuning DC voltage at pin 2 of the Tuner. The DC
voltage should vary according to the frequency/channel
being chosen.
7.
If the tuning voltage is OK, check the tuner output, pin 11.
8.
If it has no output, the Tuner may have a defect. Change
the Tuner.
Sound in Picture Problem for L' System (rolling horizontal
lines)
1.
Check whether AGC L' in SAM mode is set to 0.
2.
If yes, align the set to correct value.
Required System is not Selected Correctly
Check whether a Service jumper (#4204 & 4205, 0805 size) is
present. If yes, remove it.
5.7.5
Video Processing
No Power
1.
Check +12 V and 3V3 at position 1J02.
2.
If no supply, first check the connector 1J02.
3.
If the connector is correct, check the power supply board.
Power Supply is Correct, but no Green LED
1.
Check if the connectors 1K00 are properly inserted.
2.
If they are inserted correctly, check if the 3V3 is present.
No Picture Display (blank screen with correct sound
output)
1.
Check whether the user menu is visible.
2.
If the user menu is OK, activate teletext mode.
3.
If teletext is OK, the problem is in the ADC (B18) &
Columbus 3D combfilter (B19), if present (depending on
model, see also paragraph “Teletext Path
”
in chapter 9).
4.
If the user menu is not visible, check if the LCD panel
backlight is ON.
5.
If the backlight is OFF, the problem is in the power supply
board or LCD panel. Also check pin 12 (LAMP_ON_OFF)
of 1J02. It should be HIGH during normal operation.
Note:
For fault finding purposes, it is important to know the
following: in Pixel Plus and Digital Crystal Clear models, which
have an ADC (B18) and Columbus 3D combfilter (B19), the
digital input of the scaler is used for the digital video path
(Hercules output), whereas the analogue RGB input (analogue
Byte 6
180(dec)
0
LTI status
LTI last status
0
1
Inc_Life_Time
Inc_Life_Time
0
2
PC_Mode
PC_Mode
0
3
HD_Mode
HD_Mode
0
4
Tact_Switch
Tact_Switch
0
5
Set_In_Special_Stby
Set_In_Special_Stby
0
6
Hotel_OSDDisplay
Hotel_OSDDisplay
0
7
Hotel_MonitorOut
Hotel_MonitorOut
0
Total Dec Values
0
Total Hex Values
00
Byte 7
181(dec)
0
Hotel_IconMode
Hotel_IconMode
0
1
DBE
DBE
1
2
SD
SD
0
3
Set_in_PC_Sleep_Mode
Set_in_PC_Sleep_Mode
0
4
Reserved
Reserved
1
5
Reserved
Reserved
0
6
Reserved
Reserved
0
7
Reserved
Reserved
0
Total Dec Values
18
Total Hex Values
12
Byte Nr.
Bit
Feature/Mode
Description
26PF5321/10/12
32PF5321/10/12
37PF5321/10/12
26PF7321/12
32PF7321/12
37PF7321/10/12
42PF5421/10
