Panasonic TH-42PHD5 - Manuals

9 New front protection filter glass improves the natural reds New phosphors improve the blue color reproduction. Scan Explanation The 1-field (1/60 sec) display pixels on the Panasonic 42" and 37" SD models and on the ALIS system models are VGA level. (Panasonic HD models are XGA level, for ...

10 D D u u a a l l S S c c a a n n ( ( H H D D ) ) S S i i n n g g l l e e S S c c a a n n ( ( S S D D ) ) •Simple and low cost circuit •High performance •Higher brightness Figure 5 Figure 4

11 Disassembly Rear Cover Removal Remove the 27 screws, shown in Figure 6, and then pull away the rear cover. Removal of the shield Remove the six screws, shown in Figure 7, and then pull away the rear shield cover. Figure 8 Figure 7 Figure 6

13 42” HD PCB Board Layout Diagram Printed Circuit Board Information Table Board Name Part Number Function C1 TNPA2428 Data Drive (Upper Left) C2 TNPA2429 Data Drive (Upper Right) C3 TNPA2430 Data Drive (Lower Right) C4 TNPA2431 Data Drive (Lower Left) D1 TZTNP01LLSB Format Converter D2 TNPA2427 Pla...

14 50” PCB Board Layout Diagram Board Name Part Number Function C1 TNPA2510 Data Drive (Upper Left) C2 TNPA2511 Data Drive (Upper Center) C3 TNPA2512 Data Drive (Upper Right) C4 TNPA2513 Data Drive (Lower Right) C5 TNPA2514AB Data Drive (Lower Center) C6 TNPA2515 Data Drive (Lower Left) C9 TNPA2608 ...

15 42” SD PCB Layout Diagram Board Name Part Number Function C1 TNPA2540 Data Drive (Lower Right) C2 TNPA2541 Data Drive (Lower Left) D1 TZTNP01MMSB Format Converter D2 TNPA2589 Plasma AI Sub-Field Processor F TXN/F10MMS Line filter H3 TNPA2249 Speaker terminal HX TZTNP020JAS PC type Input terminal ...

17 HX Board Figure 14 PC RGB Signals are input to the HX Board. The RGB signals as well as the vertical and horizontal sync signals are amplified by a series of transistor amplifiers. The RS232C communications bus line is also connected on this board. The RS-232C connection is provided so that opera...

18 D1 Board Figure 15 After the input signals are amplified by the HY/HZ and HX boards the desired signal is selected. The microprocessor sends the command via the IIC bus to the input select switch (IC3001). The video switch selects from one of the three inputs. The component video signal output fr...

19 DVI Interface Figure 16 An optional Digital Visual Interface (DVI) module connection is provided on this generation Plasma Display Panels. The DVI interface allows direct digital transfer from a display device to the panel. A VGA or component video signal requires a conversion from the digital to...

22 D1 Board Figure 20 D1-board consists of the Analog and Digital signal process. It also contains the Discharge control and Microprocessor control block. Supply voltages of 13.5V, 5V, Standby 5V, 3.3V, and 1.8 V operate the D1-board. The input RGB video signals are at 0.7Vp-p. Video signals in the ...

23 D2 Board Figure 21 The D2 board provides the scan, sustain and data drive signals. The scan pulses are output to the SC board. The sustain pulses are output to the SS board. The data drive signals are output to the C1, C2, C3 and C4 boards. The C1 board drives the Upper right portion of the panel...

24 D2 Board details Figure 22 The Plasma AI (Adaptive brightness Intensifier) circuits analyze the video program level for the distribution of dark and bright components. The upper and lower eight bit video signals are memorized into two Plasma AI processors IC9651 and IC9601. The Plasma AI circuits...

28 SS Board Explanation Figure 26 After the video signal is processed on the D2 board, the sustain and erase pulses are output to the SS board. The erase pulse is output at the beginning of each scan period. The pulse is applied to the SS2 and SS3 boards to remove the previous charge for the upper a...

31 Power Supplies Standby Power Supply Figure 29 The standby power supply provides the necessary DC voltage for the system control Microprocessor, Reset circuit and the EEPROM. D421 rectifies the incoming AC Voltage and applies it to the transformer T402 and the standby B+ control circuit IC400. The...

32 Main Power Supply Figure 30 Power Factor Control The power factor control circuit operates like a boost regulator. The incoming AC voltage, after being switched on, enters the rectifier D402 where it is converted to DC. The Power Factor Control (PFC) circuit converts the DC level to 400Vdc. The n...

34 High Voltage Power Supply Figure 31 The P3-Board contains the drive voltage oscillator circuit that develops the Vsus voltage needed to drive the Scan and Sustain boards. Operation begins with the 18Vdc supply being applied to pin 12 of connector P15. This voltage serves as start up voltage for I...

36 Protection Circuits Figure 32 Protection circuits are incorporated in the unit to prevent the failure of a single circuit or component from creating catastrophic damage. The P7 and P8 boards are daughter boards on the P1 main power supply board. The P7 board monitors the Vbk (195V), Vda (75V) and...

38 Diagnostic Procedures Self Check Display Indication Self-check is used to automatically check the bus line controlled circuits of the Plasma display. To get into the Self-check mode, press and hold the Volume Down button on the front of the unit, then the OFF-TIMER button on the remote control. T...

39 Power LED Flashing timing chart When an abnormality has occurred in the unit, the protection circuit operates and shuts off the power supply. The faulty area can be identified by the number of flashes of the Power LED at the front of the unit.

40 Diagnostic Flow Charts No Power There are three states of “No Power” indication by the power LED: 1. The power LED does not light up. 2. The power LED is green at power up. It then turns red a few seconds later and blinks on and off. 3. The power LED is red at power up and never changes state. No...

41 The Power LED is red and blinking on/off. When one or more of the power supply voltages is missing, the red LED blinks on and off. Remove Connector P5 No Is the LED still blinking red? Check D1-Board. Check SS/SC-Boards. Yes Blinking stops But still no picture Check the output of the P-Board. No ...

42 Power LED blinks twice Are the SS board LEDs lit? The SS board is suspected to be defective. Is the SC board LED lit? The SC board is suspected to be defective. Is the Vda voltage correct? The Power supply is suspected to be defective. The D1 is suspected to be defective. NO NO NO YES YES YES

43 No Picture Flowchart 1 Is the On screen Display information visible? Is the SC Board LED illuminated? Is the SS Board LED illuminated? SC Board is probably defective. SS Board is probably defective. D1 or D2 Board is probably defective. Does the problem exist on all inputs? Does the problem exist...

44 No picture Flowchart 2 Are the video signals correct at the D1 board input? Reference the HY/HZ and HX board troubleshooting charts Is the SC board LED lit? The SC board is suspected to be defective. Is the TPSC1 Waveform incorrect? The D2 Board is suspected to be defective. Are the voltages at c...

45 Dark picture Flowchart Are the video signals correct at the D1 board input? Reference the HY/HZ and HX board troubleshooting charts Are the SS board LEDs lit? The SS board is suspected to be defective. Is the TPSS1 Waveform incorrect? The D2 Board is suspected to be defective. Are the voltages at...

46 Local screen failure The Plasma Display Panel unit may develop a failure, where the symptom is localized in a particular area of the screen. The figure below can help localize the circuit board that is most likely to be defective. In the example in figure 34, one of the two boards, C3 and D2 is l...

47 2. Listen to the buzz noise of the SC board; if the buzz noise is not present, a malfunction of the SC-Board is suspected. Suggestions: Check the Scan pulse waveform at TPSC1. (Use TPSS1 of the SS-board to trigger the oscilloscope.) Verify the input signals at connector SC2, SC4, SC20 and SC21. V...

48 Symptom: No picture (black Screen) Suggestion: The use of a magnifying glass can help localize the defective printed circuit board. Use the magnifying glass to take a close look at the pixels of the screen. If the pixels are faintly lit , the defect is most likely located in one of the following ...

50 Figure 41 Symptom: Horizontal Black Bar (Completely dark) Note: The use of a magnifying glass can help localize the defective printed circuit board. Use the magnifying glass to take a close look at the pixels in the area of the black bar. 1 If the pixels are totally dark , the defect is most like...

53 After Image Prevention If a customer has been viewing a 4:3 picture or another stationary pattern for a long period of time it is possible for an after image to be burned into the panel. Advise the customer that operation in 4:3 mode for a long period can cause a permanent image burn, damaging th...

54 4. To stop the screen saver, press the R button on the remote control. Side Bar Brightness adjustment This feature allows the customer to adjust the brightness of the non-picture area on either side of the 4:3 image on screen. 1. Press the Setup button on the remote control. 2. Use the Up/Down ar...

55 Option Setting Accessing the Option Menu 1. Press to display the Setup menu. 2. Press to select OSD Language. 3. Press the surround button on remote control for more than three seconds. The action menu should be displayed on screen. Figure 56 Figure 57 Figure 58

56 Settings the Action Menu 1. Use the Up/Down buttons to select the desired item. 2. Use the Left / Right Buttons to select the desired function The option menu will disappear 60 seconds after the operation. Press the R button to exit the Option Menu. Hidden Option Menu for GPH5D series GPH5D chass...

58 Sample Waveforms HY/HZ board The pages that follow contain samples of waveforms that are present when the unit is in good operating condition. Prior to determining that a board should be replaced, it is advisable that these waveforms are checked to help achieve the right conclusion. Figure 61 is ...

61 HX board Figure 62 is an illustration of the HX-Board. The board is the interface between the PC input and the D1-Board. When troubleshooting, connect a PC to the input terminals and observe the output signals at connector HX1/D3. See the next page for waveform samples. Figure 62

63 SC Board Input Signals Figure 63 Figure 63 is an illustration of the SC-Board connection to the remaining boards of the panel. The SC-board is the interface between the D2-Board, SU and the SD Boards. When troubleshooting, connect a fixed video source to any of the input terminals and observe the...

64 SC Board Waveforms The waveforms listed below must be checked at connector SC20 of the SC-Board. CN SC20, Pin 1 1ms / div, 0.2V CRL CN SC20, Pin 2 1ms / div, 0.2V CEL CN SC20, Pin 3 1ms / div, 0.2V CEH CN SC20, Pin 6 1ms / div, 0.2V CSL CN SC20, Pin 7 1ms / div, 0.2V CSH CN SC20, Pin 8 1ms / div,...

66 SS-Board Input Signals Figure 64 Figure 64 is an illustration of the SS-Board connection to the remaining boards of the panel. The SS-board is the interface between the D2-Board, SS2 and the SS3 Boards. When troubleshooting, connect a fixed video source to any of the input terminals and observe t...

67 SS Board Waveforms The waveforms listed below must be checked at connector SS32 of the SS-Board. CN SS32, Pin 2 1ms / div, 0.2V URH CN SS32, Pin 3 1ms / div, 0.2V UEL CN SS32, Pin 4 1ms / div, 0.2V UEH CN SS32, Pin 5 1ms / div, 0.2V UBL CN SS32, Pin 6 1ms / div, 0.2V USH CN SS32, Pin 7 1ms / div,...

68 PDP Defect Pixel Specification Zone B Zone A 25% 25% Check Zone Lit Pixel Single Defect Pair Defect Defect Distance G 0 A R 0 0 - B 3 G B R 0 6 0 5 cm B Dead Pixel Zone Specification 1. Dead Pixel (pixel is always off) 2. Lit Pixel (pixel is always 3. Pair defect (Adjacent pixels 4. Defects Dista...

69 Connector Tables F-BOARD CONNECTORS The following table lists the voltage levels present at each pin of the connectors of the F-Board. Use this information to confirm that the F-Board is operating properly. Connector F1 Pin Numbers Signal Name Voltage Findings 1 AC IN AC Line Input Level 2 NC 3 N...

73 HX- BOARD CONNECTORS The following table lists the voltage levels present at each pin of the connectors of the HX-Board. Use this information to confirm that the HX-Board is operating properly. Connector HX1/D3 Pin Number Signal Name Voltage Findings Signal Flow (Board or Connector) A-1 5V 5.2Vdc...

75 Adjustment Procedures Panel label Information An example of the panel production date: MC106W36P4 NO. ************* Vbk: **** V Vsus: **** V Ve: **** V Vad: **** V Made in Japan M Panel Production Date *** Panel Part Number Panel Serial Number Adjustment Voltage Year 9 1999 0 2000 1 2001 1. 7. 1 ...

76 +B Set-up Item / Preparation • Input a 100% white signal. • Set the picture mode to Normal and the White Balance to Normal • Adjustments Adjust and confirm the indicated test point below for the specified voltage. Adjustment table Name Test Point Voltage Volume PFC P20 across pins 1 and 2 400V ± ...

78 Initialization Pulse Adjust Item / Preparation • Input a Crosshatch signal. • Set the picture mode to Normal and the White Balance to Normal Adjustments Adjust the indicated test point for the specified waveform. Use TPSS1 as the trigger source. Test point Volume Level T1 TPSC1 (SC) R6523 (SC-Boa...

81 Lef t/Right Action VOL R Status Return VOL Up/Dow n VOL Up/Dow n Serviceman mode CAT (computer aided test) Mode CAT mode menu CAT Panel sys8.1 IIC Mode CD Mode SD Mode MS Mode ID Mode Remote Control How to access the CAT mode . Press and hold the Volume/Down button on the front panel of the unit ...

82 CD mode Select the CD mode from the front page of the CAT menu by pressing the Up/Down button on the remote control, and then press the Mute button on the remote control for more than 5 sec. OSD The software version of the EEPROM (IC9354) can be upgraded by: 1. Installing a new version IC 2. Load...

83 SD Mode Select the SD mode from the front page of the CAT mode by pressing the Up/Down button on the remote control, and then press the Action button on the remote control. OSD To exit the SD mode, press the R button on the remote control. Input command Check Power Protect MTBF Parameter WT PT 23...

84 I 2 C Menu Structure The values indicated in this flowchart are sampled data. Figure 70

85 Alignment Procedures Pedestal Setting Equipment required: HDTV Component Video Gray scale pattern Generator, PC Video Gray Scale Generator Panel Settings; Picture = Normal, White Balance = Cool, Aspect Ratio = 16:9 Pattern Display: Figure 71 Step 1- Access the R, G and B cutoff settings and set t...

86 NTSC (480i) White Balance Adjustment Equipment required: NTSC Pattern Generator, Colorimeter Panel Settings; Picture = Standard, Color Temperature = Cool, Aspect Ratio = 16:9 Step 1- Using the Pattern generator; apply a 20 IRE (15% Light) Window pattern signal to the panel. Apply the color sensor...

87 480p White Balance Adjustment Equipment required: 480p Pattern Generator, Colorimeter Panel Settings; Picture = Standard, Color Temperature = Cool, Aspect Ratio = 16:9 Step 1- Using the Pattern generator; apply a 20 IRE (15% Light) Window pattern signal to the panel. Apply the color sensor to the...

88 720p White Balance Adjustment Equipment required: 720p Pattern Generator, Colorimeter Panel Settings; Picture = Standard, Color Temperature = Cool, Aspect Ratio = 16:9 Step 1- Using the Pattern generator; apply a 20 IRE (15% Light) Window pattern signal to the panel. Apply the color sensor to the...

89 1080i White Balance Adjustment Equipment required: 1080i Pattern Generator, Colorimeter Panel Settings; Picture = Standard, Color Temperature = Cool, Aspect Ratio = 16:9 Step 1- Using the Pattern generator; apply a 20 IRE (15% Light) Window pattern signal to the panel. Apply the color sensor to t...

90 Sub Brightness Setting Equipment required: NTSC grayscale pattern Generator Panel Settings; Picture = Normal, Aspect Ratio = 16:9 Pattern Display: Note: Adjust in a Dark room. Step 1- Set the white balance to Cool. Step 2- Access the All cutoff setting in service mode and adjust so that pixel emi...

91 Service Contact Information Panasonic Customer Call Center 1-800-211-7262 Tech Support Hotline PTV and Digital Products 1-800-743-2335 (Authorized Service Centers only) All Other Products 1-800-572-2672 (Authorized Service Centers only access code required) Fax 1-800-348-7315 1-201-392-4207 Non –...