Panasonic Training 9th Gen Schematic

9th Generation Plasma Display

Technical Information

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The technicians have express their needs and we listened.

This presentation has been developed especially for the technicians involved in the repair of our plasma televisions.

We’ve gathered and analyzed your emails, questions, feedback, and requests. Based on this information, we have put together a presentation to fulfill your needs.

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Topics

•Power Supply/System Control Interaction

•Boards Isolation

•Understanding SOS Condition

•Video Processing

•Troubleshooting

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9th Generation Plasma Display Television

•What really happens when the TV is plugged in?

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Sequence of Events when the TV is Plugged In

When the Plasma TV is plugged in, there’re a few indications of normal operation. Knowing this will help us understand what’s going on with the unit when an abnormality occurs.

1.There is a click from the relays RL402 and RL403 when they are activated.

2.The LED in the Optical Jack inside the DT board turns on for approx. 4 seconds.

3.Immediately after that, one of the Tuner LEDs (Right) turns on (Solid Red) for approximately 20 seconds.

4.The LED in the Optical Jack inside the DT board turns on again for approx. 1 second and both LEDs (tuner and optical jack) turn off.

5.Then you will hear another click from the relays RL402 and RL403 indicating that they are no-longer engaged. (Note: At this time the Tuner and the Optical Jack LED turn off.)

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Standby Block (Part 1)

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Standby Block (Part 2)

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Power Supply (Standby Circuit)

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Power Supply (Standby Circuit)

SS34 Connector

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STB5V Distribution

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STB5V Test Point (P board)

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STB5V Test Point (PA board)

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Power Supply (Standby Circuit)

Tuner SUB ON = Command to turn the relays on.

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F-STB-ON (Primary)

T404

H

H

H

L

L H

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F-STB-14V and PFC Test Points

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F-STB-14V

H

L

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SUB-Voltages Output From the PA Board

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PA Board Test Points

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Power On/Off Operation

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Power Off

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Power On

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Power Supply Secondary Circuit (1)

L H

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Power Supply Secondary Circuit (2)

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Power Supply Connectors

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PA board Circuit Explanation

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Main-Voltages Output From the PA Board

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No Power Troubleshooting Chart

Can the click sound from the relays be heard after the TV is plugged into the wall outlet?

No

Yes

Is there 5V at pin 1 of connector PA40 on the PA board?

Yes

No

Replace the P Is there 2.5V at pin 13 of Board. connector P25 on the P

board?

Wait for approx. 20 seconds after applying AC to the TV. Then turn the power on.

Can the click sound from the relays be heard while attempting to turn the power on?

Yes No No Yes

Replace the P	Replace the	No	Is there 3.3V at pin 1 of		Replace the P
Board.	DG Board.	connector HC01 on the HC			Board.
			board?		Yes
				Yes
	Replace the D		No	Is there 2.5V at pin 17 of
	Board.			connector P25 on the P

board?

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Shutdown Detect Circuits

Understanding how the SHUTDOWN circuit works

SOS

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