Panasonic TH-42PF20W Service Manual

Order Number PCZ1004048CE
Service Manual
High Definition Plasma Display
Model No. TH-50PF20E
TH-50PF20ER
GPF13D Chassis
A WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by A in the Schematic
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer's specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions ------------------------------------- --- 3 7.3. No Picture ------------------------------------------- --------- 19
1.1. General Guidelines --------------------------------------- --- 3 7.4. Local screen failure ------------------------------ --------- 20
1.2. Touch-Current Check ------------------------------------ --- 3 8 Service Fixture & Tools ------------------------------- --------- 21
2 Warning------------------------------------------------------------------ 4 8.1. SC jig-------------------------------------------------- --------- 21
2.1. Prevention of Electrostatic Discharge (ESD) 9 Disassembly and Assembly Instructions --------------- 22
to Electrostatically Sensitive (ES) Devices -------
— 4
9.1. Removal of Rear Cover ------------------- --------- 22
2.2. About lead free solder (PbF) -------------------------- --- 5 9.2. Removal of Slot Block--------------------- --------- 22
3 Service Navigation ------------------------------------- --- 6
9.3. Removal of DS-Board --------------------------- --------- 22
3.1. Service Hint ---------------------------------------------------- 6 9.4. Removal of HX-Board--------------------------- --------- 22
3.2. Applicable signals ---------------------------------------- --- 7 9.5. Removal of A-Board ----------------------------- --------- 23
4 Specifications---------------------------------------------- 9 9.6. Removal of PB-Board---------------------- --------- 23
5 Operating Instructions --------------------------------- --10 9.7. Removal of Fan----------------------------- --------- 23
6 Service Mode----------------------------------------------12 9.8. Removal of P-Board ----------------------- --------- 24
6.1. CAT (Computer Aided Test) mode -------------- --12 9.9. Removal of AC Inlet Assy---------------------- --------- 24
6.2. IIC mode structure (following items value is 9.10. Removal of H3-Board --------------------------- --------- 24
sample data)--------------------------------------------------16 9.11. Removal of SU-Board and SD-Board------ --------- 24
7 Troubleshooting Guide -------------------------------- --17 9.12. Removal of SC-Board---------------------- --------- 25
7.1. Self Check -------------------------------------------17 9.13. Removal of SS-Board---------------------- --------- 25
7.2. No Power ---------------------------------------------------- --19 9.14. Removal of SS2-Board -------------------- --------- 26
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Panasonic TH-42PF20W Specifications

General

Screen Size	42 inches
Display Technology	Plasma
Aspect Ratio	16:9
Contrast Ratio	4000:1
Resolution	1920 x 1080
Input Ports	HDMI, DVI-D, Component, Composite