Panasonic LC4.8E AA Service Manual page 21

Chassis
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Byte Nr. Bit
Byte 5
0 FFI
179(dec)
1 NNR
2 MUS
3 GAM
4 CBS
5 LLB
6 DSA
7 DSK
Total Dec Values
Total Hex Values
Byte 6
0 LTI status
180(dec)
1 Inc_Life_Time
2 PC_Mode
3 HD_Mode
4 Tact_Switch
5 Set_In_Special_Stby
6 Hotel_OSDDisplay
7 Hotel_MonitorOut
Total Dec Values
Total Hex Values
Byte 7
0 Hotel_IconMode
181(dec)
1 DBE
2 SD
3 Set_in_PC_Sleep_Mode
4 Reserved
5 Reserved
6 Reserved
7 Reserved
Total Dec Values
Total Hex Values
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 the SDM jumpers (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.
Service Modes, Error Codes, and Fault Finding
Feature/Mode
Fast Filter
No red reduction during blue stretch
NTSC matrix
Gamma control
Control sequence of beam current limiting
Low level of beam current limiter
Dynamic skin tone angle area
Dynamic skin tone angle on/ off
LTI last status
Inc_Life_Time
PC_Mode
HD_Mode
Tact_Switch
Set_In_Special_Stby
Hotel_OSDDisplay
Hotel_MonitorOut
Hotel_IconMode
DBE
SD
Set_in_PC_Sleep_Mode
Reserved
Reserved
Reserved
Reserved
Description
0
1
1
1
0
0
1
0
78
4E
1
0
0
0
0
0
0
0
1
01
0
1
0
0
0
0
0
0
2
02
5.7.3
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
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.
LC4.8E AA
5.
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
78
78
4E
4E
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
01
01
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
2
2
02
02
2
C lines are working correctly (3.3 V).
EN 21

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