Panasonic Generation Plasma Display Television Uživatelský manuál

Panasonic Service and Technology CompanyNational Training10th Generation Plasma Display TelevisionTechnical Guide

10

10th Generation Plasma Television11Board Layout

12

TH-42PX75U Boards Layout & DescriptionPanasonic started using single scan addressing in the 42” HD models last year when the 9th generation of Pla

TH-42PX75U Board Layout (Pictorial)14

2006/2007 Signal Process/Switching CircuitThe 2007 42” plasma models have less boards than the previous generation. The PA, DT, DG, H, and HC boards u

Overall Block Diagram16

Overall Block DiagramThe operation of the plasma TV can be divided into 3 different sections:1. Power Supply CircuitThe power supply circuit board (P

18

10th Generation Plasma Television19Power Supply

Panasonic Service and Technology CompanyPrepared byCesar Perdomo and Jean MagloirePanasonic Service and Technology CompanyNational Training WarningTh

20

Standby Circuit21

Standby Circuit1. When the TV is connected to the AC line, the power supply outputs 5V. 2. This voltage is applied to the D board and the A board. T

Standby Circuit23

Standby CircuitWhen AC is applied to the TV, the Standby circuit outputs 5Vdc and 12Vdc. The 5V is applied to the Power MCU and the switching transist

STB5V/STB3.3V DistributionThe STB5V is connected to the D and A boards. During standby, this voltage is not used by the D board. On the A board, the S

P25This circuit combined with the circuit in the following page is used to explain the reason why the CPU (IC9003) on the D board is not active during

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

Main CPU VCC Supply (A Board)28

Main CPU VCC Supply (A Board)On the A board, the STB5V is applied to pins 3 and 4 of the 3.3V regulator (IC5604). Pin 4 is the voltage input to the IC

Table of ContentsSubject Page # Subject Page #2007 Panasonic Plasma Line-up5Troubleshooting (No Power/Dead Unit) Part 256Models Comparison6SOS Circuit

TV_SUB_ON/TUNER_SUB_ON30

TV_SUB_ON/TUNER_SUB_ONThe STB 5V at pin 5 of connector A7 and the TV SUB ON command at pin 6 are used to activate the PA SOS detect circuit on the A b

TV_SUB_ON (F_STB_ON)32PP Board

TV_SUB_ON (F_STB_ON)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 o

TV_SUB_ON (Relay Drive Circuit)34

TV_SUB_ON (Relay Drive Circuit)The F_STBY_ON voltage (3.2V) from pin 6 of connector P7 is applied to pin 23 of the power MCU (IC501) on the P board. W

PFC CircuitPin 16 of IC501 also goes low when pin 23 is “high”. When pin 16 goes “low”, the diode within the photo-coupler IC401 emits light to turn o

ACFB (Active Clamp Full Bridge Switching) Circuit37

ACFB (Active Clamp Full Bridge Switching) CircuitThe PFC 395VDC is applied to the switching circuit (Q408, Q409, Q412, and Q413). The operation of thi

MAIN/SUB Voltages39

Table of Contents (Continued)Subject Page #Driver Setup Adjustment 96Initialization Pulse Adjustment 97Quick adjustment after P.C.B. exchange 984

MAIN/SUB VoltagesThe 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 inpu

F+15V, DTV9V, SUB5V SOS Detect Circuit41

F+15V, DTV9V, SUB5V SOS Detect CircuitThe F+15V, DTV9V, and SUB5V are monitored for over-voltage and over-current conditions by the SOS circuit on the

Power On Operation43

Power On Operation44The 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

Power-On (1)45L H

Power-On (1)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

Power On (2)Upon receiving the power on command , the “PANEL STB/VCC ON” pin of the main MPU (IC1100) outputs 2.5V to the base of Q4015, turning it o

48Power On (3)

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

2007 Panasonic Plasma Line-up5

Power On (Summary)50When the power is turned on, the “PANEL MAIN ON” command and the “F STB ON” command are applied to the power MCU (IC501). The comp

P15V/P5V Circuit51

P15V/P5V CircuitThe 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 th

Vsus/Vda Circuit53

Vsus/Vda CircuitThe 3.2V from pin 11 of connector P25 is applied to the PANEL_MAIN_ON pin (24) of the POWER CPU (IC501). When pin 24 goes high, pin 14

Troubleshooting (No Power/Dead Unit) Part 1Do the AC relaysclick after the TV is pluggedinto the AC line?Is there2.5V at pin 20 of connector D5 when

Troubleshooting (No Power/Dead Unit) Part 2Is there 3.3V at pin 6 of connector P7 when the TV is plugged into the AC line?ReconnectA1 and Disconnect

10th Generation Plasma Television57Shutdown Circuits

58

SOS Circuit Overview59

Models Comparison6

SOS Circuit OverviewProtection circuits are incorporated in the unit to prevent the failure of a single circuit or component from creating catastrophi

SOS Circuit Overview6 Blinks SOS: 6 blinks of the power LED may also be obtained from pin 3 of IC9003, the DRV_RESET input. The D board provides the 5

SOS Circuit Overview10 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

DRV_RST SOS63

DRV_RST SOSThe DRV RST circuit of the D board is used to monitor the physical connection of the D board to the C board. DRV RST input to IC9500 and I

Location of Q930265

Close-up View of Q930266

5 Blinks SOS (1)67

5 Blinks SOS (1)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 sh

SOS (Drive-reset)69

Models Comparison7

D and C Boards Connection70Caution:1. The ribbon cable C10/C20 must be transferred during a panel exchange. 2. The improper installation of the con

12 Blinks SOS71

12 Blinks SOS1. Sound processing and adjustments are performed by IC2106. The two channel PWM audio output of the IC is applied to the audio power am

10th Generation Plasma Television73Signal Processing

74

Signal Circuit Overview75

Signal Circuit OverviewThe K is the Remote Receiver and Power LED board. Commands that originate from the remote control or keypad of the GS board are

Video Process Block Diagram7777

Video Process Block Diagram78The main function of the A board is to select and process one of the incoming video signals. Video inputs 1 and 2, Compon

D Board Block Diagram79

Models Comparison8

D Board Block DiagramDischarge ControlIC9500 of the D board contains the Discharge Control circuit that analyzes the RGB and sync information of the v

Panel Drive (TH-42PX75U)IC6901IC6902IC6903IC6904IC6905IC6906SUSDIC6951IC6952IC6953IC6954IC6955IC6956SCAN ELECTRODE768Line : 42”HDDATA ELECTRODE1024Lin

Panel Drive (TH-42PX75U)Discharge ControlIC9500 of the D board contains the Discharge Control circuit that analyzes the RGB and sync information of th

Audio Process Block Diagram8383

Audio Process Block Diagram84IC3101 of the A board handles the audio selection of most inputs. Analog Audio signals from composite, component, and DVI

85

10th Generation Plasma Television86Adjustments

87

Self-Check Function1. Checks the communication IIC bus lines2. Provides a SOS HistoryTo Access the Self-Check Mode, turn the TV on and while pressing

How to Reset the UnitTo Reset the Unit, turn the TV on and while pressing the “VOLUME ( - )” button on the main unit, press the “Menu” button on the

High Resolution (FULL-HD Panel)About Twice the Resolution of a Standard HD PDP!About Twice the Resolution of a Standard HD PDP!●●HD PDP(approx. 1,050,

Self-Check Menu90

Check point91

Serviceman ModeTo enter the Serviceman Mode, turn the TV on and while pressing the “VOLUME ( - )” button on the main unit, press the “RECALL” button o

Serviceman Mode Menu and NavigationNOTE: This is not part of the Menu93Key command“1” button...Main items Selection in forward direction“2” button...M

Adjustment Sub Menu94

Internal Test PatternsTo access the internal patterns, select [AGING] from the main adjustment menu and press the [3] or [4] button of the remote cont

Driver Setup AdjustmentDriver Set-upItem / Preparation1. Input a white signal to one of the unit’s video input.2. Set the picture controls as follows:

Initialization Pulse Adjustment1. Input a 100% White signal to the unit.2. Set the picture controls as follows:Picture menu : VividNormal : SetAspect

Quick adjustment after P.C.B. exchange981. CautionWait 1 minute for the electrolytic capacitors to discharge before removing any PCB from the unit. 2.