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Confidential

For NSC's Only For Authorised Service Agents Only Ref No: MQM0103OH290513REV2


TECHNICAL INFORMATION
A BG CY E FL I LT MD NL S TR Date
AL BIH CZ EST GB IRL LV MK P SK UA 05.06.2013
AND BY D F GR IS M MNE PL SLO Country Reported
B CH DK FIN H L MC N RO SRB EU
Product Category: LCD Television

Subject: Backlight LD module repair of LCD LED panel,
Backlight performance improvement
Model(s) Affected: TX-L50B6B
TX-L50B6E


Symptom / TV has no picture and sound, sometimes LED flashes 3 times
LCD panel .... root cause is noisy signal on the gate of Back Light transistors causes
Cause:
overheating and transisitor damage

Remedy / 1- Exchange Transistors Q9804 and Q9802, both P/N: B1CFRM000028 on the LD board (P/N: TXNLD1ZPUE)
2- Exchange two capacitors C9807 & C9812 from value 1nF to 2,2nF (F1J1H102A909 => F1J1H222A911)
Method:
3- For unreliable LD board operation (appearance) when doing repair, please exchange whole LD PCB - P/N: TXNLD1ZPUE
4- Additionally flash the TV with latest SW version 3.005 onwards


Note: When having above models on service for any other reason, kindly flash the TV with sLD8 chipset SW version 3.005
Get the SW from PanaNet. This modification applies to all units prior to: N*-3330003

TV Rear view
Service Spare Partkit Number:
TZS9EK098
LD TXNLD1ZPUE
INCLUDES:
Transistor - B1CFRM000028 - 2pcs
Capacitor - F1J1H222A911 - 2pcs




LD TXNLD1ZPUE foil side




C9807 Q9804


SW flash method for SDDL.SEC (secured SW Peaks flash)
Q9802
1- prepare empty USB memory key or stick C9812
formatted to FAT32 (!)
2- put the unzziped content = SDDL.SEC (Peaks SW)
file into USB memory root
3- insert USB flash stick with SDDL.SEC file into operating TV
and follow the instruction on the screen...




Warranty Claims - Please use the following IRIS and Activity codes
Activity Codes: Guarantee Code Activity Location Stock Indicator
(UK Only) A R W D
Symptom Section Defect
Condition Repair
IRIS Codes: Area Type Code Area Code Area Code
6 1 1 11F 3 VPD 2 N i
Note: Failure to use the correct IRIS and Activity codes may result in the claim being rejected

Document No: MQM_TI
Panasonic 1 of 1 Rev: 12.00 DG110612