Panasonic TX-LR42U20, Service Manual

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© Panasonic Corporation 2010. Unauthorized
copying and distribution is a violation of law.
ORDER NO. MTV1001936CE
LCD TV
Model No.
TX-LR42U20
Chassis: KM09
Destination: CIS
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions ----------------------------------------------- 4
1.1. General Guidelines---------------------------------------- 4
1.1.1. Leakage Current Cold Check---------------------- 4
1.1.2. Leakage Current Hot Check (See Figure
1.) --------------------------------------------------------- 4
2 Warning -------------------------------------------------------------- 5
2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatically Sensitive (ES) Devices---------- 5
2.2. About lead free solder (PbF)---------------------------- 6
3 Service Navigation ----------------------------------------------- 7
3.1. Service Hint ------------------------------------------------- 7
4 Specifications ----------------------------------------------------- 8
5 Service Mode ------------------------------------------------------ 9
5.1. How to enter into Service Mode ----------------------- 9
5.1.1. Contents of adjustment mode --------------------- 9
5.1.2. How to exit---------------------------------------------- 9
5.2. SRV-TOOL -------------------------------------------------10
5.2.1. How to access ----------------------------------------10
5.2.2. Display of SOS History -----------------------------10
5.2.3. POWER ON TIME/COUNT -----------------------10
5.2.4. Exit ------------------------------------------------------ 10
5.3. Service Mode Adjustment------------------------------ 11
5.3.1. Self Check Mode ------------------------------------ 11
5.3.2. Hotel Mode Adjustment---------------------------- 11
5.3.3. Hotel Mode-------------------------------------------- 11
6 Troubleshooting Guide --------------------------------------- 12
6.1. Check of the IIC bus lines------------------------------ 12
6.1.1. How to access --------------------------------------- 12
6.1.2. Exit ------------------------------------------------------ 12
6.1.3. Screen display --------------------------------------- 12
6.1.4. Check Point------------------------------------------- 12
6.2. Power LED Blinking timing chart --------------------- 13
6.3. No Power--------------------------------------------------- 13
7 Disassembly and Assembly Instructions --------------- 14
7.1. AC Cord Dressing 1 ------------------------------------- 14
7.2. AC Cord Dressing 2 ------------------------------------- 15
7.3. AC Cord Installation ------------------------------------- 16
7.4. Control Panel Assembly & Clamper
Installation ------------------------------------------------- 17
7.5. Side AV Preparation & Installation------------------- 18