Panasonic Service and Technology Company
Technical Guide
10th Generation Plasma Display Television
National Training
Panasonic Service and Technology Company
Panasonic Service and Technology Company
Prepared by Cesar Perdomo and Jean Magloire
National Training
Table of Contents
Subject
Page #
Subject
Driver Setup Adjustment Initialization Pulse Adjustment
Table of Contents Continued
Quick adjustment after P.C.B. exchange
2007 Panasonic Plasma Line-up
Models Comparison
Models Comparison
Models Comparison
High Resolution FULL-HD Panel
About Twice the Resolution of a Standard HD PDP
HD PDP approx. 1,050,000 pixels
Image resolution about twice as high *When compared to the 50PX600
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Board Layout
10th Generation Plasma Television
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TH-42PX75U Boards Layout & Description
TH-42PX75U Board Layout Pictorial
2006/2007 Signal Process/Switching Circuit
Overall Block Diagram
Overall Block Diagram
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Power Supply
10th Generation Plasma Television
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Standby Circuit
1. When the TV is connected to the AC line, the power supply outputs
Standby Circuit
Standby Circuit
When AC is applied to the TV, the Standby circuit outputs 5Vdc and 12Vdc. The 5V is applied to the Power MCU and the switching transistor Q537 of the power supply circuit. The 12V is provided to the SS board. A jumper at connector SS34 of the SS board routes the 12V back into the power supply board to turn on Q537. When Q537 is on, the STB5V is output to the D and A boards. On the D board, the STB5V is applied to a 3.3V regulator IC9011. During standby operation, this regulator is kept off to disable the panel drive circuits. The STB5V is also applied to a 3.3V regulator IC5604 on the A board to provide the supply voltage STB3.3V to the Main CPU IC1100. The STB3.3V is also applied the Remote Control receiver and the power LED on the K board. Furthermore, the STB3.3V is provided to the SD card slot Not shown in the diagram
Standby Circuit
STB5V/STB3.3V Distribution
STB5V
The STB5V source is connected to the voltage input pin 4 of the RESET/STB3.3V regulator IC9011. The output of this IC is controlled by the ON/OFF pin Pin 6. The DC level of this pin is determined by the “STB3.3V ON/OFF” circuit
STB5V
Main CPU VCC Supply A Board
This command splits in 2 TUNERSUBON and TVSUBON
Main CPU VCC Supply A Board
TVSUBON/TUNERSUBON
TVSUBON/TUNERSUBON
TVSUBON FSTBON
P Board
The F-STB-ON voltage 3.2V from pin 6 of connector P7 is applied to pin 23 of the Power CPU IC501 on the P board. IC501 sends out commands to first turn on the primary circuit of the power supply, and then the circuit that allows the FSTB15V to develop
TVSUBON FSTBON
TVSUBON Relay Drive Circuit
TVSUBON Relay Drive Circuit
300ms later, pin 12 goes “low” allowing for only the main relay RL402 to remain on. RL401 is triggered whenever RL402 or RL403 are triggered
PFC Circuit
ACFB Active Clamp Full Bridge Switching Circuit
ACFB Active Clamp Full Bridge Switching Circuit
5. The FSTB15V is applied to pins 7, 8, and 9 of connector P6
MAIN/SUB Voltages
The F+15V from the power supply is applied to pins 6, 7, and 8 of connector A6 on the A board. The 15V is applied to the voltage input pin pin 9 of the “SUB+5V/SUB+9V” dual regulator IC3500. The 15V is also used to keep pin 1 and pin 15 high
MAIN/SUB Voltages
F+15V, DTV9V, SUB5V SOS Detect Circuit
F+15V, DTV9V, SUB5V SOS Detect Circuit
The F+15V, DTV9V, and SUB5V are monitored for over-voltage and over-current conditions by the SOS circuit on the A board
Power On Operation
Power On Operation
The power command from the power switch on the S board or the remote control receiver on the K board is provided to the CPU in the A board. The CPU on the A board outputs the “PANELSTBON” command and the “FSTBON” command. The “PANELSTBON” is provided to the D board to turn on the STB3.3V regulator. The output voltage is applied to the CPU in the D board. The “FSTBON” command is provided to the power supply to develop the FSTB+15V
Power-On
Power-On
When the unit is turned on using the power button on the front of the TV, the momentary connection of the power switch to ground supplies a low to the base of Q5604 DG board to turn it on. Q5604 outputs a low to the key input line pin 18 of the CPU IC1100 on the A board
Power On
Power On
Power On
The STBY5V from the power supply board is applied to pin 4 of the regulator, IC9011. During Standby operation, the regulator does not operate due pin 6 being low
Power On Summary
P15V/P5V Circuit
The P15V is generated when the power is turned on. The high 3.2V “Panel Main On” command from the D board is applied to pin 24 of the Power MCU IC501 on the Power Supply board. When IC501 receives this command on pin 24 3.2V, pin 10 goes high
P15V/P5V Circuit
Vsus/Vda Circuit
Vsus/Vda Circuit
Troubleshooting No Power/Dead Unit Part
Unplug the TV
Troubleshooting No Power/Dead Unit Part
connector A52
If cable between connectors GS52 and
Reconnect
Shutdown Circuits
10th Generation Plasma Television
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SOS Circuit Overview
SOS Circuit Overview
Protection circuits are incorporated in the unit to prevent the failure of a single circuit or component from creating catastrophic damage
6 Blinks SOS 6 blinks of the power LED may also be obtained from pin 3 of IC9003, the
SOS Circuit Overview
10 Blinks SOS IC5600 is a 3.3V regulator located on the A board. Its output is monitored by IC1100. If the 3.3V is not present at pin 67, the MPU shuts down the unit. The power LED blinks 10 times
SOS Circuit Overview
DRVRST SOS
DRVRST SOS
Test Point TP9200 is the ideal location to check for DRV RST
Location of Q9302
Close-up View of Q9302
5 Blinks SOS
The 5V SOS may be caused by a defective shift register located on a ribbon cable that connects the C boards to the panel. A shorted shift register typically shorts out both the Vda and 5V inputs. To determine whether a shift register is shorted or not, disconnect the connector SS23 and measure the resistance between pin 12 of the connector C23 and ground. The normal resistance is approximately 110000 ohms. If the panel is shorted, the resistance to ground is very low
5 Blinks SOS
SOS Drive-reset
D and C Boards Connection
12 Blinks SOS
1. Sound processing and adjustments are performed by IC2106. The two channel PWM audio output of the IC is applied to the audio power amplifier IC2301. The PWM signals of the power amplifiers are output to the right and left channel speakers for sound reproduction
12 Blinks SOS
Signal Processing
10th Generation Plasma Television
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Signal Circuit Overview
Signal Circuit Overview
The K is the Remote Receiver and Power LED board. Commands that originate from the remote control or keypad of the GS board are received and processed by the system control circuit located on the A board
Video Process Block Diagram
Video Process Block Diagram
The main function of the A board is to select and process one of the incoming video signals. Video inputs 1 and 2, Component Video Inputs 1 and 2 and the composite video output of the tuner are all are connected to IC3001 for selection. The video output signal of the switch can be in any of the three formats Video, Y/C, or Y, Pb, Pr. The selected output enters IC4510, the HDMI IF Receiver/Decoder IC, for A/D conversion
D Board Block Diagram
D Board Block Diagram
Component
Function
Component
Panel Drive TH-42PX75U
Back side view
Drive
inside
Discharge Control
Panel Drive TH-42PX75U
Data Drive
Audio Process Block Diagram
Audio Process Block Diagram
IC3101 of the A board handles the audio selection of most inputs. Analog Audio signals from composite, component, and DVI inputs are connected to IC3101 for selection. The analog audio of the tuner is also provided to IC3101 for selection. The output of IC3101 enters IC2106 and undergoes analog to digital conversion. The serial data output is provided to the switch. The HDMI receiver section of IC4510 converts the incoming HDMI audio into serial data. The Audio interface circuit selects between the two HDMI audio and outputs the SD serial Data to the switch located inside IC2106
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Adjustments
10th Generation Plasma Television
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remote control for more than 3 seconds
Self-Check Function
1. Checks the communication IIC bus lines 2. Provides a SOS History
How to Reset the Unit
Note All customer programmed parameters will be erased
Self-Check Menu
Check point
Serviceman Mode
TV or the Remote Control
Serviceman Mode Menu and Navigation
Key command
Adjustment Sub Menu
Internal Test Patterns
TV or the Remote Control
Driver Setup Adjustment
Driver Set-up Item / Preparation
1. Input a 100% White signal to the unit
Initialization Pulse Adjustment
Aspect Full
2. Quick adjustment after P.C.B. or Panel exchange
Quick adjustment after P.C.B. exchange
1. Caution