Related Manuals for Panasonic Generation Plasma Display Television
Summary of Contents for Panasonic Generation Plasma Display Television
- Page 1 Panasonic Service and Technology Company Technical Guide Generation Plasma Display Television National Training...
- Page 2 Panasonic Service and Technology Company Panasonic Service and Technology Company Copyright © 2007 by Panasonic Services Company All rights reserved. Unauthorized copying and distribution is a violation of law. This service information is designed for experienced repair technicians only and is not designed for use by the general public.
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Page 3: Table Of Contents
Table of Contents Subject 2007 Panasonic Plasma Line-up Models Comparison High Resolution (FULL-HD Panel) TH-42PX75U Board Layout & Description TH-42PX75U Board Layout (Pictorial) 2006/2007 Signal Process/Switching Circuit Overall Block Diagram Standby Circuit STB5V/STB3.3V Distribution Main CPU VCC Supply (A Board) - Page 4 Table of Contents (Continued) Subject Driver Setup Adjustment Initialization Pulse Adjustment Quick adjustment after P.C.B. exchange Page #...
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Page 5: 2007 Panasonic Plasma Line-Up
2007 Panasonic Plasma Line-up... -
Page 6: Models Comparison
Models Comparison... - Page 7 Models Comparison...
- Page 8 Models Comparison...
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Page 9: High Resolution (Full-Hd Panel)
High Resolution (FULL-HD Panel) The Full-HD plasma panel boasts a total of about 2,070,000 pixels (1920 x 1080). It renders true-to-life HD images with about twice the resolution of a standard HD panel. HD PDP (approx. 1,050,000 pixels) ● 1366 (Image resolution about twice as high) About Twice the Resolution of a Standard HD PDP! About Twice the Resolution of a Standard HD PDP! -
Page 11: Board Layout
Generation Plasma Television Board Layout... -
Page 13: Th-42Px75U Board Layout & Description
Panasonic started using single scan addressing in the 42” HD models last year when the 9th generation of Plasma TV was introduced. The single scan addressing was only used on standard definition models previously. For this generation, Panasonic has added the 50” models to the list of TV using single scan addressing. -
Page 14: Th-42Px75U Board Layout (Pictorial)
Board Layout (Pictorial) TH-42PX75U... -
Page 15: 2006/2007 Signal Process/Switching Circuit
2006/2007 Signal Process/Switching Circuit The 2007 42” plasma models have less boards than the previous generation. The PA, DT, DG, H, and HC boards used on the 2006 42” models are now incorporated within the new A board of the 2007 models. -
Page 16: Overall Block Diagram
Overall Block Diagram... - Page 17 The operation of the plasma TV can be divided into 3 different sections: Power Supply Circuit The power supply circuit board (P board) provides voltages to the Signal switching/processing circuit and the Panel drive circuit. Signal Switching/Processing Circuit Upon connecting the unit to the AC voltage source, the STB5V of the P board is provided to the A board for system control operation.
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Page 19: Power Supply
Generation Plasma Television Power Supply... -
Page 21: Standby Circuit
Standby Circuit... - Page 22 When the TV is connected to the AC line, the power supply outputs 5V. This voltage is applied to the D board and the A board. The 5V applied to the D board in the Panel Drive Section is not used during standby operation. On the other hand, when the A board receives the 5V from the Power supply, it outputs the “F_STB_ON”...
- Page 23 Standby Circuit...
- Page 24 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.
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Page 25: Stb5V/Stb3.3V Distribution
STB5V/STB3.3V Distribution The 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 STB5V is applied to a 3.3V regulator (IC5604) to generate the STB3.3V to power the MAIN MICON Genx4 (IC1100). - Page 26 STB5V (2) This 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 Standby. The transistor Q9014 is on to keep PANEL_STBY_ON low.
- Page 27 STB5V (3) 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”...
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Page 28: Main Cpu Vcc Supply (A Board)
Main CPU VCC Supply (A Board) - Page 29 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 and pin 3 is the ON/OFF command. The STB5V at pin 3 allows pin 5 to output 3.3V. The 3.3V from IC5604 is then applied to pins 31, 50, 74, 78, 81, 85, and 100 of the CPU (IC1100).
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Page 30: Tv_Sub_On/Tuner_Sub_On
TV_SUB_ON/TUNER_SUB_ON... - Page 31 TV_SUB_ON/TUNER_SUB_ON The 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 board. This circuit monitors the F+15V, DT9V, and SUB5V for abnormality. Under normal operation, the TUNER_SUB_ON voltage from pin 1 of the main CPU (IC1101) turns on Q3504.
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Page 32: Tv_Sub_On (F_Stb_On)
TV_SUB_ON (F_STB_ON) P Board... - Page 33 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 out commands to first turn on the primary circuit of the power supply, and then the circuit that allows the F_STB15V to develop.
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Page 34: Tv_Sub_On (Relay Drive Circuit)
TV_SUB_ON (Relay Drive Circuit) - Page 35 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. When pin 23 goes “high”, pin 12 goes “high” turning on Q502 to trigger the inrush relay RL403. Approximately 300ms later, pin 11 also goes ”high”...
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Page 36: Pfc Circuit
PFC Circuit Pin 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 on the photo-transistor. Pin 4 of IC401 goes “low”. This “low” is applied to the gate of Q401 turning it on to apply 12V to pin 8 of PFC circuit. -
Page 37: Acfb (Active Clamp Full Bridge Switching) Circuit
ACFB (Active Clamp Full Bridge Switching) Circuit... - Page 38 ACFB (Active Clamp Full Bridge Switching) Circuit The PFC 395VDC is applied to the switching circuit (Q408, Q409, Q412, and Q413). The operation of this switching circuit is controlled by the transformer T402 which is driven by the V-low power control IC, IC520. A “high”...
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Page 39: Main/Sub Voltages
MAIN/SUB Voltages... - Page 40 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.
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Page 41: F+15V, Dtv9V, Sub5V Sos Detect Circuit
F+15V, DTV9V, SUB5V SOS Detect Circuit... - Page 42 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. Under normal condition, pin 114 of the main CPU (IC1100) is low. When a short circuit or an over-voltage condition occurs, the SOS detect circuit is triggered causing pin 114 to go high.
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Page 43: Power On Operation
Power On Operation... - Page 44 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 “PANEL_STB_ON” command and the “F_STB_ON”...
- Page 45 Power-On (1)
- Page 46 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 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.
- Page 47 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 on. Q4015 outputs a low to turn off Q4014 allowing pin 20 of the connector A5/D5 to go high.
- Page 48 Power On (3)
- Page 49 Power 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 6 being low. Upon receiving the power on command , the “PANEL STB ON” high from pin 20 of connector D5 is applied to the base of Q9044 on the D board, turning it on.
- Page 50 Power On (Summary) When the power is turned on, the “PANEL MAIN ON” command and the “F STB ON” command are applied to the power MCU (IC501). The complete standby operation is repeated when the “F STB ON” command from the A board is applied to pin 23.
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Page 51: P15V/P5V Circuit
P15V/P5V Circuit... - Page 52 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 (4.8V).
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Page 53: Vsus/Vda Circuit
Vsus/Vda Circuit... - Page 54 Vsus/Vda Circuit The 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 goes low to provide the ground path to turn on the LED within the photo-coupler IC507.
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Page 55: Troubleshooting (No Power/Dead Unit) Part 1
Troubleshooting (No Power/Dead Unit) Part 1 there pin 5 of connector A7 when the TV is plugged into the AC line? Unplug the TV. Disconnect connector A7. Does the TV turn on by itself with no picture and lit LEDs on the SS &... -
Page 56: Troubleshooting (No Power/Dead Unit) Part 2
Troubleshooting (No Power/Dead Unit) Part 2 Continue from Previous slide there 3.3V at pin 6 of connector P7 when the TV is plugged into the AC line? Replace The P board Disconnect connector A1. Do the AC relays click after the TV is plugged into the AC line? If cable between connectors K1 and A1 is OK,... - Page 57 Generation Plasma Television Shutdown Circuits...
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Page 59: Sos Circuit Overview
SOS Circuit Overview... - Page 60 SOS Circuit Overview Protection circuits are incorporated in the unit to prevent the failure of a single circuit or component from creating catastrophic damage. 1 Blink SOS: This shutdown operation is usually caused by a lack of communication between the A and the D boards.
- Page 61 SOS Circuit Overview 6 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 5V source needed to power the C boards. On the C2 board, the 5V is routed back to the D board via connector C20/C10, C11/D31 causing pin 3 of IC9003 to be high.
- Page 62 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.
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Page 63: Drv_Rst Sos
DRV_RST SOS... - Page 64 DRV_RST SOS The 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 IC9003 must be high for the unit to operate. The D board provides the 5V source needed to power the C boards.
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Page 65: Location Of Q9302
Location of Q9302... -
Page 66: Close-Up View Of Q9302
Close-up View of Q9302... -
Page 67: Blinks Sos
5 Blinks SOS (1) -
Page 68: Sos (Drive-Reset)
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 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. -
Page 69: D & C Boards Connection
SOS (Drive-reset) - Page 70 D and C Boards Connection Caution: The ribbon cable C10/C20 must be transferred during a panel exchange. The improper installation of the connectors C11 and C21 may cause vertical lines to appear in the picture. The improper connection of the connectors C11, C21, C10 and C20 causes a DVR_RST SOS.
- Page 71 12 Blinks SOS...
- Page 72 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. IC2303 converts the 15V source to 12V for connection to the audio power amplifiers.
- Page 73 Generation Plasma Television Signal Processing...
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Page 75: Signal Circuit Overview
Signal Circuit Overview... - Page 76 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. The A board contains an Optical Audio Out jack for use with a Dolby Digital decoder and a multi-channel audio amplifier.
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Page 77: Video Process Block Diagram
Video Process Block Diagram... - Page 78 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.
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Page 79: D Board Block Diagram
D Board Block Diagram... - Page 80 Component Function IC9500 LVDS RECEIVER / DISCHARGE CONTROL IC9900 PLASMA AI / SUB-FIELD PROCESSOR IC9901 DDR SDRAM IC9200 CLOCK GEN. Discharge Control IC9500 of the D board contains the Discharge Control circuit that analyzes the RGB and sync information of the video signal to create the Scan data to drive the Scan operation (SC) board and Sustain data to drive the Sustain operation (SS) board.
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Page 81: Panel Drive (Th-42Px75U)
Panel Drive (TH-42PX75U) IC9900 VIDEO DATA DATA Processor IC9500 Discharge CONTROL Control PULSE SCAN CONTROL PULSE VIDEO SIGNAL & DATA TIMING PULSE <SU Board> IC6901-IC6906 : SHIFT REGISTER (UPPER) IC6901 IC6902 IC6903 SCAN IC6904 Drive SCAN IC6905 Signal ELECTRODE IC6906 768Line : 42”HD IC6951 IC6952... - Page 82 Panel Drive (TH-42PX75U) Discharge Control IC9500 of the D board contains the Discharge Control circuit that analyzes the RGB and sync information of the video signal to create the Scan data to drive the Scan operation (SC) board and Sustain data to drive the Sustain operation (SS) board.
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Page 83: Audio Process Block Diagram
Audio Process Block Diagram... - Page 84 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.
- Page 86 Generation Plasma Television Adjustments...
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Page 88: Self-Check Function
1. Checks the communication IIC bus lines 2. Provides a SOS History To Access the Self-Check To Access the Self-Check Mode, turn the TV on and while pressing “VOLUME ( - )” button on the main unit, press the “OK” button on the “VOLUME ( - )”... -
Page 89: How To Reset The Unit
How to Reset the Unit Note: All customer programmed parameters will be erased. To Reset the To Reset the Unit, turn the TV on and while pressing the “VOLUME ( - )” button on the pressing the “VOLUME ( - )” button on the main unit, press the “Menu”... -
Page 90: Self-Check Menu
Self-Check Menu... -
Page 91: Check Point
Check point... -
Page 92: Serviceman Mode
To enter the Serviceman To enter the Serviceman Mode, pressing the “VOLUME ( - )” button on the main unit, pressing the “VOLUME ( - )” button on the main unit, press the “RECALL” button of the remote control three times within 3 seconds. “RECALL”... -
Page 93: Serviceman Mode Menu And Navigation
Serviceman Mode Menu and Navigation NOTE: This is not part of the Menu Key command “1” button...Main items Selection in forward direction “2” button...Main items Selection in reverse direction “3” button...Sub items Selection in forward direction “4” button...Sub items Selection in reverse direction “VOL”... - Page 94 Adjustment Sub Menu...
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Page 95: Internal Test Patterns
To access the internal patterns, select [AGING] from the main adjustment menu and press the [3] or [4] button of the remote control to select the desired pattern. To exit the Serviceman Mode To exit the Serviceman Mode TV or the Remote Control. TV or the Remote Control. -
Page 96: Driver Setup Adjustment
Driver Setup Adjustment Driver Set-up Item / Preparation 1. Input a white signal to one of the unit’s video input. 2. Set the picture controls as follows: Picture menu: Vivid Normal: Set Aspect: Full Caution 1. Perform the Vsus adjustment. 2. -
Page 97: Initialization Pulse Adjustment
Initialization Pulse Adjustment 1. Input a 100% White signal to the unit. 2. Set the picture controls as follows: Picture menu : Vivid Normal : Set Aspect : Full 3. Connect an Oscilloscope to test point TPSC1. Using VR6602, adjust (T2) for 195+/- 10µ... -
Page 98: Quick Adjustment After P.c.b. Exchange
Quick adjustment after P.C.B. exchange 1. Caution Wait 1 minute for the electrolytic capacitors to discharge before removing any PCB from the unit. 2. Quick adjustment after P.C.B. or Panel exchange...