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ORDER NO. MTNC020409C1 B2
Service Manual
HDTV MONITOR Main Manual (P7W)
Panasonic
Models
PT-47WX52F PT-47WX52CF PT-47WX42F PT-47WX42CF
Chassis
EP824 EP824 EP824 EP824
This service manual is issued as a service guide for the models of the P7W family listed above. Included in this manual are a set of schematics, alignment procedures, disassembly procedures and a complete parts list.
"WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death." The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" in the Main Manual. Copyright 2002 by Matsushita Electric Corporation of America. All rights reserved. Unauthorized copying and distribution is a violation of law.
®
Important safety notice
Special components are used in this projection television which are important for safety. These components are identified on the schematic diagram by the symbol and printed in BOLD TYPE on the replacement part list. It is essential that these critical parts are replaced with the manufacturer's specified replacement part to prevent x-ray radiation, shock, fire or other hazards. Do not modify the original design without the manufacturer's permission.
Safety precautions
General guidelines
An isolation transformer should always be used during the servicing of a PTV whose chassis is not isolated from AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the PTV from being damaged by accidental shorting that may occur during servicing. When servicing, observe the original lead dress, especially in the high voltage circuit. Replace all damaged parts (also parts that show signs of overheating.) Always replace protective devices, such as fishpaper, isolation resistors and capacitors, and shields after servicing the PTV. Use only manufacturer's recommended rating for fuses, circuits breakers, etc. High potentials, as high as 32.5kV, are present when this PTV is operating. Operation of the PTV without the rear cover introduces danger for electrical shock. Servicing should not be performed by anyone who is not thoroughly familiar with the necessary precautions when servicing high-voltage equipment. Extreme care should be practiced when handling the picture tube. Rough handling may cause it to implode due to atmospheric pressure. (14.7 lbs. per sq. in.). Do not nick or scratch the glass or subject it to any undue pressure. When handling, use safety goggles and heavy gloves for protection. Discharge the picture tube by shorting the anode to chassis ground (not to the cabinet or to other mounting hardware). When discharging connect cold ground (i.e. DAG ground lead) to the anode with a well insulated wire or use a grounding probe. antenna terminals, control shafts, etc. If the exposed metallic part has a return path to the chassis, the reading should be between 240k and 5.2M. If the exposed metallic part does not have a return path to the chassis, the reading should be infinite. Leakage current hot check (see figure 1) Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during the check. Connect a 1.5k 10 watt resistor in parallel with a 0.15µF capacitor between and exposed metallic part and ground. Use earth ground, for example a water pipe. Using a DVM with a 1000 ohms/volt sensitivity or higher, measure the AC potential across the resistor. Repeat the procedure and measure the voltage present with all other expose metallic parts. Verify any potential does not exceed 0.75 volt RMS. A leakage current tester (such a Simpson model 229, Sencore model PR57 or equivalent) may be used in the above procedure, in which case any current measure must not exceed 0.5 milliamp. If any measurement is out of the specified limits, there is a possibility of a shock hazard and the PTV must be repaired and rechecked before it is returned to the customer. AC VOLTMETER
COLD WATER PIPE (GROUND)
0.15µF
X-ray precautions
The front area (between the projection tube and the lens) is enclosed by a metal box to ensure positive safety during normal and abnormal conditions when checking and repairing. To fully ensure safety, the following precautions must be observed. 1. Do not remove the lens or metal box. 2. Make sure to turn the power OFF when the lens is removed or when checking the cleanliness of the lens. 3. Do not remove the lens or metal box to check the projection tube for operation by watching it directly. Use a mirror or paper to view the image. Before returning a serviced PTV to the owner, the service technician must thoroughly test the unit to ensure that is completely safe to operate. Do not use a line isolation transformer when testing.
TO INSTRUMENT'S EXPOSED METAL PARTS
1500,10W
Figure 1. Hot check circuit
Insulation test
Connect an insulation tester between an exposed metallic part and AC line. Apply 1080VAC/60Hz for 1 second. Confirm that the current measurement is 0.5mA ~ 2.0mA. Repeat test with other metallic exposed parts.
X-ray radiation
WARNING: The potential source of x-ray radiation in the PTV is in the high voltage section and the picture tube. Note: It is important to use calibrated equipment. Apply all black video signals (1080i) and confirm high voltage measures 31.5 ± 1.0kV. If the high voltage is not within the range, change C514 to 1800pF, 2000pF, 2400pF or 2700pF until the desired value is obtained. Apply NTSC white pattern and confirm the high voltage measures 30.1 ± 1.5kV. Apply HD 1080I white pattern and confirm the high voltage measures 30.1 ± 1.5kV -2-
Leakage current cold check
Unplug the AC cord and connect a jumper between the two plug prongs. Press the POWER switch ON. Measure the resistance between the jumpered AC plug and expose metallic parts such as screw heads, Service Manual
About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu). That is Tin (Sn), Silver (Ag) and (Cu) although other types are available. This model uses Pb Free solder in it's manufacture due to environmental conservation issues. For service and repair work, we'd suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf symbol back of PCB.
stamped on the
Caution · Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30 ~ 40 °C) higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C). · Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C). If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder. · After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the opposite side. (see figure below)
remove all of the excess solder component pin component
slice view
solder
Suggested Pb free solder There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.
0.3mm X 100g
0.6mm X 100g
1.0mm X 100g
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Service Manual
Important safety tests
Measuring H.V.
The anode caps are cemented to the CRTs. To gain access for high voltage measurement, remove the red CRT's anode lead from the flyback transformer distributor. Grasp the anode lead protective cap at its bottom and squeeze it against the locking cap body inside, rotate 1/4 turn counter clockwise and pull the anode lead sleeve out of the FBT distributor. Connect a high voltage lead (+) from your H.V. meter to the FBT distributor, and the common (-) to cold ground ( ). (see figure 2). 1 Grasp protective rubber cap 2 Push & rotate cap counterclockwise to remove Anode lead 3 Discharge to CRT chassis 4. Connect a H.V. meter (static type, class 0.1) with high voltage leads to high voltage distributor on FBT. (See figure 4)
TPD51 TPD50 D-Board
+
-
DVM
D-Board
IC802 PIN 2 OR TPD8 HEAT SINK OF Q551
MA150 100 1/2 W
(+) Variable power (15~25DC) supply (-)
FBT distributor Figure 2. Removal of FBT leads
Note:
Reinsert the anode lead into the FBT distributor until it is tightly and fully seated. Turn the locking cap clockwise to lock in place.
(EHT) Protector operation check
With the cabinet back removed, apply a nominal 120V AC to the PTV. Over voltage test Preparation: 1. Turn PTV "OFF" 2. Connect a NTSC signal generator to the antenna terminal. 3. Connect DVM (+) TPD50 and (-) TPD51 on D Board (see figure 4) Cold ground
FBT Distributor
Figure 4. DVM & power supply connection. 5. Connect the 15 ~ 25 V DC variable power supply to (+) TPD8 or IC802 pin 2 (D-Board) and (-) heat sink of Q551 (see figure 4). Procedures: 1. Apply a NTSC white pattern. 2. Turn PTV ON. 3. Adjust the picture or brightness controls so that the DVM reads 12.4 volts ± 0.4 volts. 4. Increase the variable power supply until set turns off. The set should turn off at 12.4 volts ± 0.4 volts (DVM) and high voltage less than 36.4kV. 5. If the DVM reading is other than 12.4 volts (± 0.4 volts), readjust picture or brightness control and repeat steps 3. 6. Turn off the variable supply and confirm that the set will turn on with the remote control.
+
CRT CHASSIS
H.V. METER
Figure 3. Measuring H.V.
Service Manual
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About format aspect switching(WX 16:9 or HX 4:3)
Widescreen 16:9 and non-widescreen 4:3 PTVs use the same light box, for this reason is important to set it to the correct version (16:9 or 4:3). To change the format please refer to figure 62 on page 43. Be sure to select the correct format for the serviced PTV.
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Service Manual
Important safety notice . . . . . . . . . . . . . . . . . . . 2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . 2 General guidelines. . . . . . . . . . . . . . . . . . 2 X-ray precautions . . . . . . . . . . . . . . . . . . 2 Leakage current cold check. . . . . . . . . . . 2 Leakage current hot check . . . . . . . . . . . 2 Insulation test . . . . . . . . . . . . . . . . . . . . . 2 X-ray radiation . . . . . . . . . . . . . . . . . . . . . 2 About lead free solder (PbF) . . . . . . . . . . . . . . . 3 Suggested Pb free solder . . . . . . . . . . . . 3 Important safety tests . . . . . . . . . . . . . . . . . . . . 4 Measuring H.V. . . . . . . . . . . . . . . . . . . . . 4 (EHT) Protector operation check . . . . . . . 4 About format aspect switching . . . . . . . . . . . . . 5 Service notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Leadless chip component . . . . . . . . . . . . 7 Component removal . . . . . . . . . . . . . . . . 7 Chip component installation . . . . . . . . . . 7 How to replace Flat-IC. . . . . . . . . . . . . . . 7
NTSC ZOOM Vertical size adjustment (VSIZE). . . . . . . . . . . . . 26 NTSC Horizontal phase adjustment (H-POS) . . . . . . . . . . . . 26 HD 1080i Horizontal phase adjustment (H-POS) . . . . . . . . . . . . . . . . . . . . . 26 Trapezoid adjustment (EWTRA) . . . . . . 26 NTSC Pincushion adjustment (PCC). . . 26 HD 1080i Pincushion adjustment (PCC) . . . . . . . . . . . . . . 27 Centering magnets adjustment . . . . . . . 27 NTSC Horizontal size adjustment (H WID). . . . . . . . . . . . . 27 HD 1080i Horizontal size adjustment (H WID) . . . . . . . . . . . . . . . . . . . . . . 27 Convergence adjustment. . . . . . . . . . . . 27 Coarse adjustment mode (COARSE) . . 29 Fine adjustment mode (FINE) (convergence) . . . . . . . . . . . 30 Horizontal and vertical size check . . . . . 33 Convergence alignment template . . . . . 33 Service mode (electronic controls). . . . . . . . . 34 Quick entry to service mode . . . . . . . . . 34 To toggle between aging and service modes . . . . . . . . . . . . . 34 Exiting the service mode . . . . . . . . . . . . 34 To check colors . . . . . . . . . . . . . . . . . . . 34 Table of the service adjustments items available for each format . . . . 35 480i Service mode DACs . . . . . . . . . . . 37 480p Service mode DACs . . . . . . . . . . . 39 1080i Service mode DACs . . . . . . . . . . 41 Instructional flow chart for format aspect switching (WX 16:9 or HX 4:3) . . . . . . . . . . . . 43 Instructional flow chart for service mode. . . . . . . . . . . . . . . . . . 44 NTSC Sub-Bright adjustment (BRIGHT) . . . . . . . . . . . 46 1080i Sub-Bright adjustment (BRIGHT) . . . . . . . . . . . 46 NTSC Color adjustment (TINT, B-Y_G, R-Y_A) . . . . . . . . . . 46 1080i Color adjustment (TINT, B-Y_G, R-Y_A) . . . . . . . . . . 46 Red, green & blue screen cutoff . . . . . . 47 White balance adjustment . . . . . . . . . . . 47 Tint and color check . . . . . . . . . . . . . . . 47 MTS circuit adjustments . . . . . . . . . . . . 47 Input level adjustment (MTSIN) . . . . . . . 47 Stereo separation adjustment (SEPAL & SEPAH) . . . . . . . . . . . . . 47 Clock Adjustment (CLOCK) . . . . . . . . . . 48 Audio signal path block diagram . . . . . . . . . . 49 Video-chroma signal path block diagram . . . 50 IIC connection. . . . . . . . . . . . . . . . . . . . . . . . . . 51 Description of connectors . . . . . . . . . . . . . . . . 52 Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Feature table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Boards designation . . . . . . . . . . . . . . . . . . . . . 10 PTV - Location of controls. . . . . . . . . . . . . . . . 11 Quick reference control operation . . . . . 11 Remote - Location of controls. . . . . . . . . . . . . 12
Auto diagnosis feature. . . . . . . . . . . . . . . . . . . 14 A-Board check points . . . . . . . . . . . . . . . . . . . 15 A-Board check points waveforms. . . . . . . . . . 16 Chassis & boards layout . . . . . . . . . . . . . . . . . 17 Board description. . . . . . . . . . . . . . . . . . 17 Disassembly for service . . . . . . . . . . . . . . . . . 18 Speaker grille removal. . . . . . . . . . . . . . 18 Keyboard removal . . . . . . . . . . . . . . . . . 18 Speakers replacement. . . . . . . . . . . . . . 18 Cabinet back lower cover removal . . . . 18 Cabinet back cover removal . . . . . . . . . 18 Mirror removal . . . . . . . . . . . . . . . . . . . . 18 Screen frame removal . . . . . . . . . . . . . . 19 Screen assembly . . . . . . . . . . . . . . . . . . 19 Main chassis block . . . . . . . . . . . . . . . . 19 Chassis assembly . . . . . . . . . . . . . . . . . 19 Disassembly for CRT replacement . . . . 20 CRT replacement . . . . . . . . . . . . . . . . . 20 Optical block position adjustment . . . . . 21 PTV screen assemblies. . . . . . . . . . . . . 22 B+ voltages table . . . . . . . . . . . . . . . . . . 22 CRT set up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Dynamic focus adjustments. . . . . . . . . . 23 Electrical adjustment . . . . . . . . . . . . . . . 23 Focus - Optical lens adjustment . . . . . . 24 Optical adjustments . . . . . . . . . . . . . . . . 24 NTSC Vertical size adjustment (VSIZE) 25 HD 1080i Vertical size adjustment (VSIZE). . . . . . . . . . . . . 25
Schematics . . . . . . . . . . . . . . . . . . . . . . . . 66~103
Service Manual
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Service notes
Note: These components are affixed with glue. Be careful not to break or damage any foil under the component or at the pins of the ICs when removing. Usually applying heat to the component for a short time while twisting with tweezers will break the component loose.
Leadless chip component (surface mount)
Chip components must be replaced with identical chips due to critical foil track spacing. There are no holes in the board to mount standard transistors or diodes. Some chip capacitor or resistor board solder pads may have holes through the board, however the hole diameter limits standard resistor replacement to 1/8 watt. Standard capacitor may also be limited for the same reason. It is recommended that identical components be used. Chip resistor have a three digit numerical resistance code - 1st and 2nd significant digits and a multiplier. Example: 162 = 1600 or 1.6k resistor, 0 = 0 (jumper). Chip capacitors generally do not have the value indicated on the capacitor. The color on the component indicates the general range of the capacitance. Chip transistors are identified by a two letter code. The first letter indicated the type and the second letter, the grade of transistor. Chip diodes have a two letter identification code as per the code chart and are a dual diode pack with either common anode or common cathode. Check the parts list for correct diode number.
How to replace Flat-IC
- Required tools · · Soldering iron · De-solder braids Magnifier Sharp pliers (wire · cutters and long nose)
1. Cut the pins of the defective IC with the wire cutter pliers, and remove it completely away from the board. If the IC is glued to the board, apply hot air to complete the removal. CAUTION- Do not pull or twist the pliers, it may damage the soldering pads in the board .
Flat-IC
2. Using the soldering Iron and the long nose pliers, remove the IC pins that are still attached to the board.
Component removal
1. Use solder wick to remove solder from component end caps or terminal. 2. Without pulling up, carefully twist the component with tweezers to break the adhesive. 3. Do not reuse removed leadless or chip components since they are subject to stress fracture during removal.
Soldering Iron
3. Using the de-solder braid and the soldering Iron, remove the solder from the board soldering pads.
De-Solder Braid Soldering Iron
Chip component installation
1. Put a small amount of solder on the board soldering pads. 2. Hold the chip component against the soldering pads with tweezers or with a miniature alligator clip and apply heat to the pad area with a 30 watts iron until solder flows. Do not apply heat for more than 3 seconds. Chip components TYPE SOLDER
c c
4. Position the new flat IC in place (apply the pins of the flat IC to the soldering pads where the pins need to be soldered). Properly determine the positions of the soldering pads and pins by correctly aligning the polarity symbol. Start aligning and soldering Pin No.1, then align and solder the pin in the apposite corner of the IC, this will help to align the rest of the pins.
Polarity symbol
GRADE
CAPS
b b e e TRANSISTOR
5. Solder all pins to the soldering pads using a fine tipped soldering iron.
CAPACITOR 1ST DIGIT 2ND DIGIT MULTIPLIER =1600 = 1.6k Solder Soldering Iron
COMMON CATHODE
ANODES MH DIODE
SOLDER CAPS
RESISTOR
6. Check with a magnifier for solder bridge between the pins or for dry joint between pins and soldering pads. To remove a solder bridge, use a de-solder braid as shown in the figure below.
De-Solder Braid Solder Bridge
Soldering Iron
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Service Manual
Service notes (continued)
IMPORTANT: To protect against possible damage to the solid state devices due to arcing or static discharge, make certain that all ground wires and CRT DAG wire are securely connected. CAUTION: The power supply circuit is above earth ground and the chassis cannot be polarized. Use an isolation transformer when servicing the PTV to avoid damage to the test equipment or to the chassis. Connect the test equipment to the proper ground (( ) or ( )) when servicing, or incorrect voltages will be measured. WARNING: This PTV has been designed to meet or exceed applicable safety and x-ray radiation protection as specified by government agencies and independent testing laboratories. To maintain original product safety design standards relative to X-ray radiation and shock and fire hazard, parts indicated with the symbol on the schematic must be replaced with identical parts. Order parts from the manufacturer's parts center using the parts numbers listed in this service manual, or provide the chassis number and the part reference number. For optimum performance and readability, all other parts should be replaced with components of identical specification.
Service Manual
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Feature table
FEATURE
Chassis Number of channels Menu language Closed caption (CC) V-Chip (USA/CANADA) Picture in Picture (PIP) VIDEO INPUT MEMORY/SKIP 2RF Remote control number Screen protector Comb filter Color temp NEW YNR VM V/A norm DIGITAL SCAN RATE NTSC LINE-DOUBLER MTS/SAP/DBX Bass/Bl/Treb control AI sound SURROUND Spatializer/BBE Built-in audio power Number of speakers A/V in (rear/front) S-VHS in (rear/front) Audio out COMPONENT INPUT (Y, Pb, Pr) Dimensions WxDxH Weight (kg/lbs) Power source (V/Hz) Anode voltage Video input jack Audio input jack mm in 15WX2 (10%) 4 4 (3/1) 2/1 Fixed & Variable 2 1111x1236x626 43.74x48.66x24.64 82/180.78 120V 60Hz 31.5kV ± 1.0kV 1Vp-p 75, phono jack 500mV RMS 47k EUR7603Z30 W/PROT SCRN X X X (DIGITAL) X 1080i, 480p 480p SMOOTH PROGRESSIVE X X X X BBE 10WX2 (10%) 2
PT-47WX52F PT-47WX52CF
P7W 181
PT-47WX42F PT-47WX42CF
Eng/Span/Fr X X 2T split SKIP X EUR7603Z40 W/O PROT SCRN
ADV 3D Y/C (NEW)
Table 1: Feature Table
Specifications are subject to change without notice or obligation. Dimensions and weights are approximate.
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Service Manual
Boards designation
BOARD A-Board D-Board LB-Board LG-Board LR-Board G-Board K-Board R-Board PART NUMBER TNP2AH035 TNPH0371 TNP2AA110 TNP2AA111 TNP2AA112 TNP2AA090 TNP2AA089 TNPA0615AB BOARD DESCRIPTION signal processing power and deflection blue driver green driver red driver front A/V panel front button panel IR receiver
Table 2: Boards designation
Note:
The A-Board (TNP2AH035) is non-serviceable. Except for A-Board both tuners, IC2302, IC7001, IC7002, IC871, IC872, IC873. If any of these components or board is defective repleace it with a new one and take back the defective board to the service center.
Notice: When ordering any board, add and " S" after the board suffix application. Example: If Order D-Board, should be ordered as: TNPH0371S.
Service Manual
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PTV - Location of controls
POWER
VOLUME
CHANNEL
ACTION
TV/VIDEO
1
2
3
4
5
Figure 5. Location of controls PTV
Quick reference control operation
Quick reference control operation
1
Power - Press to turn ON or OFF. Volume - Press to adjust sound level, or to adjust audio menus, video menus, and select operating features when menus are displayed Channel - Press to select programmed channels. Press to highlight desired features when menus are displayed. Also use to select cable converter box channels after programming remote control infra-red codes (the TV/AUX/CABLE switch must be set in CABLE position). Action - Press to display main menu and access on screen feature and adjustment menus. TV/Video - Press to select TV or one of the video inputs, for the main picture or the PIP frame (when PIP frame is displayed). - 11 Service Manual
2
3
4
5
Remote - location of controls
POWER Button Press to turn ON and OFF. MUTE Button Press to mute sound. A second press resumes sound. Press also to access and delete Closed Caption display. TV, VCR, DVD, CBS/CBL Component function buttons VOL (volume) Buttons Press to adjust TV sound level. Use with Channel buttons to navigate in menus. R-TUNE (Rapid Tune) Button. Press to switch to the previous channel. ACTION Button Press to display main menu and access or exit on screen features and adjustment menus. REW, PLAY, FF, TV/VCR, STOP, PAUSE, REC & VCR CHANNEL Buttons Component function buttons. DBS EXIT& DBS GUIDE Buttons DBS function buttons. LIGHT Button Press to light remote control buttons. SAP Access second audio program ASPECT Select picture size (ratio) to match programming format MOVE, PIP, SPLIT/SIZE, FREEZE, SWAP, SEARCH, PIP CHANNEL PIP function buttons
Figure 6. Location of controls (EUR7603Z30 remote) For additional information for this remote please refer to the owner's manual section remote operation, listed on the parts list.
Service Manual
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Remote - location of controls
POWER button Press to turn ON and OFF. MUTE button Press to mute sound. A second press resumes sound. Press also to access and delete Closed Caption display. TV, VCR, DVD, CBS/CBL Component function buttons VOL (volume) buttons Press to adjust TV sound level. Use with channel buttons to navigate in menus. R-TUNE (rapid tune) button. Press to switch to the previous channel. ACTION button Press to display Main Menu and access or exit On Screen features and Adjustment Menus. REW, PLAY, FF, TV/VCR, STOP, PAUSE, REC & VCR CHANNEL buttons Component function buttons. DBS EXIT& DBS GUIDE buttons DBS function buttons. LIGHT button Press to light remote control buttons. SAP Access second audio program ASPECT Select picture size (ratio) to match programming format MOVE, PIP, SPLIT/SIZE, FREEZE, SWAP, SEARCH, PIP CHANNEL PIP function buttons
Figure 7. Location of controls (EUR7613Z40 remote) For additional information for this remote please refer to the owner's manual section remote operation, listed on the parts list.
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Service Manual
Auto diagnosis feature
This receiver incorporates a new auto-diagnosis feature. With this new feature will be easier for the technicial to detect the failures. There is a LED located by the keyboard on the front panel, this LED will start flashing when a failure is detected by the circuits located in specific areas, depending on how many times the LED is flashing, this will tell you what circuit should be checked. Make a count of flashing and see Table 3. Please use this feature effectively especially for intermittent problems. NUMBER OF FLASHES
1 2 3 4 5 6
POSSIBLE CIRCUIT
+140 LOW DC CONVEREGENCE HHS IC4011 IC4018
Table 3: SOS of front LED After the count: Proceed to check that area, verify what board is the problem located, this way the area to check will be reduced until the failure is found.
Service Manual
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A-Board check points
BV -0.46V CONV -18 -0.26V CONV +18 -0.46V 9V 8.96V 2.5V 2.58V VM 9.47V G 3.6V
BH -0.26V
R 3.58V B 3.45V B 3.11V R 3.17V G 3.19V Vp 0.00V Hp 0.24V SUB-Y 3.83V S-R 4.46V
GH -0.14V
RH 0.00V GV -0.47V RV -0.53V STB 3.3V 3.27V
STB 7V 6.96V NTSC VIDEO 3.52V SUB TUNER VIDEO OUTPUT 2.13V MAIN TUNER VIDEO OUTPUT 2.25V DTV1-Y 5.24V
S+18 20.97V
S-18 -23.77V
MAIN-Y 3.77V
S-L 4.46V Figure 8. A-Board check points
S-R 0.00V
Note:
All the measurments are in DC with a digital multimeter, color bar pattern, picture settings normalized and sound set to minimum.
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Service Manual
A-Board check points waveforms
Main tuner video output 15.72 kHz, 1 Vpp, 10µs sec/div
Sub tuner video output 15.72kHz, 1.00Vpp, 10µs sec/div
Main Y 15.72kHz, 1.00Vpp 10µs sec/div
Sub Y 15.72kHz, 1.92Vpp, 10µs sec/div
NTSC video 15.72kHz, 2.02Vpp, 10µs sec/div
VP 60Hz, 3.36Vpp, 5µs sec/div
HP 31.65kHz, 3.32Vpp, 10µs sec/div
Conv -18 60.24Hz, 0.75Vpp, 5µs sec/div
Conv +18 60.24Hz, 0.24Vpp, 5µs sec/div
G 31.65kHz, 4.72Vpp, 10µs sec/div
R 31.65kHz, 4.44Vpp, 10µs sec/div
B 31.65kHz, 4.40Vpp, 10µs sec/div
Figure 9. A-Board check points waveforms.
Note:
Waveforms were obtained with colorbar pattern, picture settings normalized and sound set to minimum.
Service Manual
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Chassis & boards layout
A
D
Top view
R
LR Back view
LG
LB
Figure 10. Chassis & boards layout.
Board description
A D Main chassis, video processing, convergence, audio processing Power supply, vertical out, horizontal out LB LG LR R Blue CRT output Green CRT output Red CRT output IR sensor
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Service Manual
Disassembly for service
Note:
Board ground wires may have to be disconnected to disassemble some boards. All ground wires must be reconnected using jumper leads, if necessary, before power is applied to PTV for service.
Speaker grille removal (figure 11)
The speaker grille is secured to the cabinet of the PTV. grip panel from the sides and middle upper part, gently pull forward to remove. When reassembling, make certain to firmly press on the panel where the insertion points (5) are located, one at each corner and one at the middle top edge.
Screw count: 14 fasten the top back cover; 10 fasten the lower back cover
Figure 11. Speaker grille removal.
Figure 12. Lower cabinet back removal
Keyboard removal
1. Remove the speaker grille. See figure 11. 2. Unplug the connectors from the Keyboard and front A/V inputs assemblies. Remove the screws affixing the keyboard to the frame assembly. Tilt the keyboard assembly upward and release it from the screen frame assembly.
Cabinet back cover removal (figure 12)
1. Remove the cabinet back lower cover. (Detailed previously). 2. The top back cover (plastic shell) is secured with (14) screws around its perimeter. See figure 12 for screws location. 3. Be careful not to damage the mirror secured to the underside of the back cover.
Speakers replacement
1. Remove the speaker grille. See figure 11. 2. Each speaker is secured to the cabinet with (4) screws. 3. Disconnect the R & L speaker lead connectors from the speaker units.
Mirror removal (figure 13)
The mirror is attached inside the cabinet cover. Carefully remove the cabinet cover to access its interior surface and remove the screws securing the brackets that hold the mirror at the top and sides to the mirror. See figure 13.
Screws (12 places) Felt
Cabinet back lower cover removal (figure 12)
1. Remove (7) hex screws around the perimeter, marked with arrows. See figure 12 for screws location. 2. Remove (3) screws from around the A/V terminal board (marked with arrows).
Brackets (4 places)
Bracket (2 places) Mirror
Felt
cabinet cover (Inside view) Service Manual - 18 Figure 13. Mirror removal
Disassembly for service (continued)
Screen frame removal
1. Remove the speaker grille. Disconnect the cables leading to the keyboard and the AV panels and remove the keyboard and AV panel assembly. The assembly is secured by three (3) screws. 2. At this point the front cover is held only by four screws, be careful not to push the cabinet forward. 3. Remove screws and tilt the assembly forward while lifting it out of place.
Main Chassis Block
Screen assembly (figure 14)
1. Remove the screen frame. See screen frame removal procedure above. 2. Place screen frame face down on a soft surface. 3. Remove all screen brackets and corner brackets
Note:
The brackets are painted black (permanent marker) on the edge to prevent reflection on image.
Figure 15. Chassis removal
Note: Main chassis block can be serviced either in normal position or laying on its back (protect hookup terminal from damage).
Bracket 0 ± 0.5mm Fresnel screen
Chassis assembly
The chassis assembly shown in figure 18 includes all the electrical and optical (light box) components.
Felt
Double adhesive tape
Screws (18 places)
Protective screen Lenticular screen Fresnel screen
Figure 14. Screen assembly 4. Note exact orientation and order of each screen. The orientation and order of the screens is critical for displaying pictures properly. Detailed screen assembly can be seen in figure 14.
Main chassis block (figure 15)
1. Remove the speaker grille. See figure 11. 2. Remove the cabinet back lower cover. See figure 12. 3. The main chassis block is secured to the cabinet by screws at front, behind the Speaker Grill and inside on the bottom of the optical frame). 4. Remove the horizontal barrier panel at the back of the cabinet. 5. Unplug connectors (K1, G1 and speaker connectors) and pull out the main chassis block. - 19 Figure 16. Chassis rear view
Service Manual
Disassembly for service (continued)
Disassembly for CRT replacement
To facilitate CRT replacement, the complete CRT mounting chassis does not need to be removed. 1. Remove the main chassis block from the cabinet. See figure 15. 2. Remove the optical bracket metal cover (rear side) by removing (6) screws from back, (2) screws from top, and (2) screws from each side. See figure 17 & figure 18.
REAR VIEW Optical bracket Optical bracket cover
Figure 19. CRT replacement. ** CAUTION: Support the CRT assembly when loosening screws.
Screws (6) places Pull down
8. Release CRT anode lead from CRT chassis wire clamp and all other wires from holders. 9. Loosen a screw that secures the DY and remove it from the CRT neck.
Figure 17. CRT replacement
Caution: To insure x-ray radiation protection, the lens must be mounted in place at all times when power is applied to the PTV.
CRT replacement
1. Remove CRT focus lens assembly (4 screws).
Lens (4) Screws
Focus pack
3.
4. 5. 6. 7.
Figure 18. Light box front view Remove the defective CRT anode lead from the high voltage distributor block that is mounted on the flyback transformer. Discharge to CRT chassis. Unplug connectors from the B-Board. See board layout. B9 for red, B10 for green, or B11 for blue. Unplug the defective CRT black DAG ground connector from the CRT Board. Remove the CRT Board from the defective CRT neck. Remove (2) screws from the defective CRT housing. See figure 19.** CAUTION: Do not remove the (4) CRT lens screws.
Figure 20. CRT assembly. 2. Lay CRT face down on a soft cloth. 3. Note position of yoke with centering tabs and remove from defective CRT. 4. Remove CRT DAG ground from defective CRT. Mount it on the replacement CRT exactly as it was on the defective CRT.
Replacement CRT is supplied with H.V. anode lead attached. 5. Wire the anode lead wire.
Note:
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6. Wire the anode lead wire.
Optical bracket (front)
8. Press yoke against bell of CRT and tighten the clamp just snug enough so it will not easily shift. 9. Assemble CRT focus lens assembly to new CRT with (4) screws. Make sure focus lens adjustment nut is in the same location as on other CRT focus lens.
1 4
RED CRT
GREEN CRT
BLUE CRT 3 2
Figure 21. Wire guide. 7. Install yoke with other CRT neck assemblies on CRT neck in the same order and position as removed from the defective CRT.
Figure 22. CRT screw tightening order.
Note:
Please assemble with screws in the order shown and tighten with the same torque.
Optical block position adjustment
51/61 46 51/61 46 51/61 46 51/61 46
51/61 46
51/61 46
Figure 23. Optical block position. The optical block mounting has holes to allow for the different size projection screens. These mounts will adjust to projection screens. If the optical block is removed for service or is replaced, it is important that the correct mounting holes are used.
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Service Manual
PTV screen assemblies
Protective screen Label on lower left corner (front side)
FRONT
Labels on opposite sides Front cabinet
Label on lower left corner (rear side)
Lenticular screen (note vertical ridges) Fresnel screen (note circular ridges)
REAR
Figure 24. Screen assemblies.
B+ voltages table
Preparation: Set the following controls Picture.......................... Normal. Bright ...........................Normal. Volume ......................... Min. (0). Procedure: 1. Apply a white NTSC pattern. 2. Connect the (-) lead of the digital voltmeter to TPGND1 (cold ground). 3. Connect the (+) lead of the digital voltmeter to each test point and confirm the B+ voltages (see Table 4).
No.
1 2 3 4 5 6
Test point (D-Board)
TPD14 TPD13 TPD12 TPD11 TPD10 C845 (-)
Voltage
138.6±1.0 19.0±1.5 19.0±1.5 -19.0±1.5 22.0±1.5 -22.5±1.5
No.
1 2
Test point (A-Board)
TPA031 TPA030
Voltage
9.0±0.5 5.0±0.5
Table 4: B+ voltages table
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CRT set up
CAUTION: Insure yoke plugs on the A-Board are reconnected before turning the PTV ON to prevent damage to the horizontal output transistor and/or CRTs. 1. Connect test generator to the antenna terminal and set for a monoscope pattern. 2. Loosen yoke clamp, seat yoke against bell of CRT and rotate to correct yoke tilt (compare to adjacent CRT). Tighten yoke clamp. 3. Remove adhesive from centering tabs and set centering tabs for zero correction. (figure 25) Procedure: Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. 1. Enter to service mode and set the following default DATA: NTSC
H-PARA V-SAW V-PARA +317 -23 +69
NTSC ZOOM
+263 -35 +117
1125i
+317 -23 +69
Note:
2. 3. Adhesive 4. 5. 4. Figure 25. Adhesive removal Cover replacement CRT lens and static converge the tubes not replaced, if needed. Check size and linearity of pattern and adjust as required. Uncover replacement CRT lens and cover other two CRT lenses. Adjust electrical and optical focus (lens), if required. Uncover all CRT lenses and use yoke centering magnet to converge replacement CRT (in center area of screen only) with other two CRTs. Disregard non-convergence in areas other than center area. Perform white balance adjustments. 6. 7.
Centering magnets
5.
The signal (NTSC, 1125i) (NTSC ZOOM option), should be displayed to enter values for specific format adjustment. For 1125i (1080i) set the default values. For NTSC and NTSC ZOOM apply a white pattern and perform the following steps. Connect the scope probe to TPD30, GND to TPD31. Confirm that level of A is 600_V ± 100_V, adjust H-PAR DAC to set to specification level. Confirm that level of B is 280_V ± 50_V, adjust V-PAR DAC to set to specification level. Confirm that level of C is more tha 20 V, adjust H-PAR DAC to set to specification level.
Focus - Electrical & optical adjustments
(use for minor adjustment or for final adjustment, for complete adjustment see following section.)
6.
Electrical adjustment
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. 1. Apply a NTSC crosshatch with dots pattern.
Panasonic
FORMAT
7.
Dynamic focus adjustments
1. Focus adjustments should be performed after 1 hour of aging. 2. Use oscilloscope with 100 : 1 probe. 3. Apply a NTSC crosshatch pattern to adjust focus. 4. Adjust the red, blue and green focus VR on the focus block for best focus of overall picture of each CRT. (figure 28) 16.7ms (V Rate)
A
B
280_V ± 100_V
B
> 20_V
A
600_V ± 100_V GND
Adjust electric focus VR and lens focus on this circle
C
Figure 27. Lens focus adjustment Table 5: Focus points RED
Electric focus Optical Focus B B
Figure 26. D. Focus adjustment waveform 5. To change DAF DATA, enter to service mode, then press POWER on remote to display DACs menu, then select DAC by pressing CH (RIGHT/LEFT) and VOL (UP/DOWN), then press ACTION to enter to DAC, then adjust by pressing VOL (RIGHT/ LEFT); press ACTION, to save press ACTION again or OTHER to exit without saving. - 23 -
GREEN
A/B A/B
BLUE
A A
Service Manual
2. Set VIDEO C_OFF DAC from 00 to 02, and project only red. Adjust red focus VR so that focus is best.. screen focus
Electric & VM focus adjustment, complete adjustment
(Perform this adjustment when a CRT is replaced or when major adjustment is required) Preparation: 1. Apply a NTSC crosshatch pattern with dots. 2. Set CONV "MUTE" DAC from 0 to 1 (disabling digital convergence.) 3. Position the longer tab of the four-pole magnet to 90 degrees (uncorrected position). (see figure 31).
+ + +
R G R G B B
+ + +
Figure 28. Focus pack 3. Adjust red lens focus (mechanical) until focus is best. 4. Adjust red focus VR again. 5. Set VIDEO C_OFF DAC from 00 to 01, and project only green. 6. Repeat steps for green only. 7. Set VIDEO C_OFF DAC from 00 to 03, and project only blue. 8. Repeat steps for blue only.
6-pole magnet (Dummy ring) 4-pole magnet Alignment magnet
Focus - Optical lens adjustment Optical adjustments
Note: This adjustment normally should not require resetting unless the lens has been replaced or adjustment has changed.
Figure 30. VM coil with focus correction magnet
Set 90 degrees
1. Optical focus adjustment is located on the top of each CRT lens system. Loosen the adjustment knurled locking knob. (figure 29) Adjustment knurled locking knobs Figure 31. 4-pole magnet 4. Position the long tab of all alignment magnets and of the dummy ring together in an uncorrected position. (See figure 32).
B
G
R
REAR VIEW Figure 29. Optical lens focus adjustment 2. Turn the PTV ON. Apply and view a crosshatch with dots pattern. 3. Adjust each lens focus for best focus while viewing each CRT. 4. Cover the red and blue CRT, projecting green only. Rotate the green lens for best focus around screen center area. 5. Do the same for the red focus lens while projecting red only. 6. Repeat for blue.
Figure 32. Alignment magnet (or dummy ring) Procedure: 1. Apply an NTSC cross hatch pattern with dots. 2. Assure that digital convergence is disabled (DAC MUTE from 0 to 1). 3. Set VIDEO "C_OFF" DAC from 00 to 02, to project red only. 4. Turn the red electrical focus adjustment VR (on focus pack) fully counterclockwise and note the position of the dots at the center of the picture. 5. Turn the red electrical focus adjustment VR fully clockwise.
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6. If the position of the dots at the center of the screen moves from the position noted in step 4., adjust the alignment magnets until the dots are in the same position as noted in step 4. 7. Turn the red electrical focus adjustment VR (on focus pack) fully counterclockwise and confirm that the position of the dots at the center of the screen did not move from their position noted in step 4. 8. If the position of the dots at the center of screen moved, repeat from step 4. 9. If the position of the dots moved after repeated adjustments, adjust until the movement of the dots is minimized. 10. Turn the red focus VR fully clockwise. 11. Adjust the 4-pole magnets until the shape of the dots at the center of the screen is circular. 12. Adjust red focus VR until optimum focus is achieved. 13. Apply NTSC crosshatch with dots or any other available pattern applicable to the following. 14. Confirm that the picture is correctly aligned in the center of the screen, shown in figure 33, adjust the centering magnets. Repeat the alignment magnet adjustments and four pole magnet adjustments (step 1. ~ step 12.).
NTSC Vertical size adjustment (VSIZE)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. Apply a NTSC pattern (see avobe note) . Set VIDEO "C_OFF" DAC from 00 to 01 (to project only green). Adjust centering magnets so that the center of the pattern get aligned with screen frame center. Adjust VDEF "VSIZE" DAC until vertical size is proportional on top and bottom. (See figure 34) Set VIDEO "C_OFF" DAC from 01 to 00
Panasonic
FORMAT
1. 2. 3. 4. 5.
Figure 34. Vertical size adjustment
HD 1080i Vertical size adjustment (VSIZE)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. 1. Apply a HD 1080i pattern (see avobe note). 2. Repeat vertical size adjustment from step 2
Panasonic
FORMAT
Figure 33. Centering magnet 15. Apply an NTSC cross hatch pattern with dots. 16. Set VIDEO "C_OFF" DAC from 00 to 01, to project green only. 17. Repeat above procedures for the green. 18. Set VIDEO "C_OFF" DAC from 00 to 02, to project red only. 19. Repeat above procedures for the blue. 20. Enable digital convergence by changing DAC MUTE from 01 to 00. 21. Following adjustments, paint position of DY centering magnets and fix the centering magnets of DY, dummy rings of VM coil, four pole magnets of VM coil and the alignment magnets of VM coil to prevent them from moving.
Figure 35. Vertical size adjustment
Note:
Please See "Service mode (electronic controls)" on page 34 for entering and exiting service mode.
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Service Manual
NTSC ZOOM Vertical size adjustment (VSIZE)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. Apply a NTSC pattern (see avobe note) . Change aspect to ZOOM mode. Repeat vertical size adjustment from step 2 Try making circle seem rounded (in proportion)
Panasonic
FORMAT
HD 1080i Horizontal phase adjustment (H-POS)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. 1. Apply a HD 1080i pattern. 2. Repeat NTSC horizontal phase adjustment from step 2.
Panasonic
FORMAT
1. 2. 3. 4.
Figure 38. H Phase adjustment Figure 36. Vertical size adjustment
Trapezoid adjustment (EWTRA)
1. Set default value
NTSC Horizontal phase adjustment (H-POS)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. Apply a NTSC crosshatch pattern with dots. Set CONV "MUTE" DAC from 00 to 01 (disabling digital convergence). Set VIDEO "C_OFF" DAC from 00 to 01 to project only green. Turn green deflection yoke until line is perfectly horizontal. Adjust H-POS DAC data so that pattern is in the center of screen.
NTSC Pincushion adjustment (PCC)
1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. Procedure: 1. Apply a NTSC crosshatch pattern with dots. 2. Set VIDEO "C_OFF" DAC from 00 to 01 to project only green. 3. Set DAC MUTE from 00 to 01 (disabling digital convergence). 4. If the distance at "A" is not 10 ± 5mm, enter "H DEF" "H WID" mode and adjust by VOLUME UP/ DOWN until it is 10 ± 5mm. See figure 39. Note:
1. 2. 3. 4. 5.
A
A = 10 ± 5mm Line with dot
Figure 37. H phase adjustment 6. Enable digital convergence by changing DAC MUTE from 01 to 00. 7. Set VIDEO "C_OFF" DAC from 01 to 00. Figure 39. Pincushion adjustment
NOT GOOD
GOOD
NOT GOOD
Service Manual
5. If not all corners of cross hatch appear in screen, enter V DEF "V SIZE" mode and adjust until they appear. - 26 -
6. Confirm that measurement of "A" has not changed. 7. Enable digital convergence by changing DAC MUTE from 01 to 00. 8. Set VIDEO "C_OFF" DAC from 01 to 00.
HD 1080i Pincushion adjustment (PCC)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder.
12. Enable digital convergence by changing DAC MUTE from 01 to 00. 13. Set VIDEO "C_OFF" DAC from 02 to 00. Following the adjustment, make sure that all deflection coils are pushed completely toward the CRT cones and that all screws are tightened.
NTSC Horizontal size adjustment (H WID)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. This adjustment is intended to adjust horizontal size of the picture. 1. Apply a NTSC pattern. 2. Set VIDEO "C_OFF" DAC from 00 to 01 to project only green. 3. Set DAC MUTE from 00 to 01 (disabling digital convergence). 4. In service mode, adjust H-WID DAC until the picture horizontal size is balanced at left and right side of screen. 5. Set DAC MUTE from 01 to 00 (disabling digital convergence). 6. Set VIDEO "C_OFF" DAC from 01 to 00.
Procedure:
1. Apply a HD 1080i pattern. 2. Repeat NTSC pincushion adjustment from step 2
Centering magnets adjustment
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. Procedures: 1. Apply a NTSC crosshatch pattern with dots. 2. Set VIDEO "C_OFF" DAC from 00 to 01 to project only green. 3. Set DAC MUTE from 00 to 01 (disabling digital convergence). 4. Loosen the deflection coil screw on the green CRT. 5. Adjust green deflection coil until the horizontal center line is horizontal. 6. Adjust centering magnets until the green pattern is equal on left and right. Adjust also for horizontal and vertical tilt. Note: Push deflection coil to top of CRT neck, then tighten deflection screw after adjusting each CRT centering and tilt.
7. Set VIDEO "C_OFF" DAC from 01 to 03 to project only blue. Adjust deflection coil until the horizontal center line matches the pattern of the grid and is leveled. 8. Adjust blue centering magnets until the pattern center is at the appropriate distance as indicated on figure 40.
R G B
HD 1080i Horizontal size adjustment (H WID)
1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. This adjustment is intended to adjust horizontal size of the picture. 1. Apply a HD 1080i pattern. 2. Repeat NTSC horizontal size adjustment from step 2. Note:
Convergence adjustment
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. It is strongly recommended to first read and understand the following section prior to make any adjustment. Convergence adjustment must be perform for 480i-p (same for interlace & progressive), 1080i and ZOOM 480i.
Note:
d
d
d measured in mm 28 mm
Turn PTV on and allow it to warm up for 30 minutes prior to making adjustments (WHITE PATTERN).
Note:
This PTV uses the scheme described below to correct for misconvergence of the three CRT projection tubes. There are various modes to this operation.
Figure 40. Centering magnets adjustment. 9. Set VIDEO "C_OFF" DAC from 01 to 02 to project only red. 10. Adjust red deflection coil until the horizontal center line matches the pattern of the grid and is leveled. 11. Adjust red centering magnets until the pattern center is at the appropriate distance as indicated on figure 40.
Preparation: Place the convergence alignment template (see "Convergence alignment template" on page 33) over the PTV screen. Align the center lines of the template with the mechanical center markers on the PTV screen Service Manual
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frame. If the template is not available, create one using the dimensions provided in "Convergence alignment template" on page 33. Remote control must be used during the procedure.
Note:
Apply the convergence alignment template to the PTV screen frame to converge the green raster only. Remove the convergence alignment template following this alignment. The red and blue rasters can then be aligned to the green raster.
13. Press "5" key on remote so that monoscope pattern appears (superimpose mode) 14. Move cursor by pressing VOL right - left and CH up - down so that cursor center overlap monoscope pattern center 15. Press "0" key to go back to "CONVERGENCE ADJ" mode. 16. Press "TV/VIDEO" key to cycle through "COARSE ADJ. MODE" options. Static Size Skew Linear
Raster Setup: 1. Enter to service mode (red CHK). 2. In SET-UP (roller guide menu) CONVERGENCE 1 set all values to 0. 3. Cover red & blue lens with caps. 4. Apply a pattern to adjust specific format: · NTSC signal to adjust 480i-p (same for interlace and progressive) · 1080i signal to adjust 1080i · 480i signal with PTV in ZOOM aspect to adjust Z480i 5. Select DAC COARSE, then press ACTION to enter to "CONVERGENCE ADJ" mode. 6. Press "0" key on remote. 7. Press ACTION key on remote to enter to "TEST_POS" mode. 8. Move pattern by pressing VOL right - left and CH up - down so that the cursor center overlap monoscope pattern center.
Corner Pin Key Figure 43. Coarse modes cycle 17. To change to "FINE ADJUSTMENT MODE" options (DAC FINE), press "TV/VIDEO" key on remote for at least 3 seconds, to go back to "COARSE ADJ MODE" options press "TV/VIDEO" on remote again for 3 seconds. 18. In "FINE ADJUSTMENT MODE" options, press "MUTE" key on remote to switch between "cursor" mode and "data" mode. · Cursor mode: Allows cursor movement by pressing VOL right - left and CH up - down. · Data mode: Allows making adjustment by pressing VOL right - left and CH up - down. 19. Either "COARSE ADJUSTMENT MODE" options or "FINE ADJUSTMENT MODE" options, press "RTUNE" repeatedly key on remote to cycle through different color adjustments (R, G , B, White) 20. To store adjustments press "7", then "ACTION" key on remote, otherwise press "POWER" then "ACTION" to exit adjustments without saving. 21. Remote functions: · 1, 3 . . . . . . . . . . change color view adj · 2 . . . . . . . . . . . . . . . . . . change pattern · 7 . . . . . . . . . . . . . . . . . . . . . . . save data · 5 . . . . . . . . . . . . . . . . . . . . . . . . . overlap · POWER . . . . . . . . . . . . . . . . . . . . to exit · RECALL . . . . . . . . . . . . display values · R-TUNE . . . . . . . . . . . . . . . cycle colors · TV/VIDEO . . . . . . . . . . . .change mode 3 secs . . . . . . . change options
30
Figure 41. Aligning cross-hair cursor with center of pattern 9. Press "5" key on remote to exit superimpose mode (monoscope pattern disappear). 10. Press "TV/VIDEO" key to enter "DATA_POS" mode 11. Adjust by pressing VOL right - left so that peak of curve is the same position as center of cursor.
Coarse adjustment mode (COARSE)
Note: 1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder. It is strongly recommended to first read and understand the following section prior to make any adjustment. Convergence adjustment must be perform for 480i-p (same for interlace & progressive), 1080i and ZOOM 480i.
Note:
Figure 42. Symmetrical shape 12. Press "TV/VIDEO" key on remote to enter "OSD_POS" mode.
Procedure: 1. Enter to "G-SIZE" mode: · DAC COARSE · Press ACTION on remote · TV/VIDEO (repeatedly) · R-TUNE (repeatedly)
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2. Press "2" repeatedly and apply the pattern of border and cross. 3. Press RECALL to display values 4. Adjust size so that the line of the border closes to the screen frame at top, bottom, left and right by pressing CH up-down and VOL right-left.
12. Press "7" then "ACTION" key on remote to save changes.
Figure 44. H & V size adjustment 5. Press "7" then "ACTION" key on remote to save changes. 6. Enter to linearity "G-LINEAR" mode by pressing "TV/VIDEO". 7. Adjust linearity by pressing VOL right-left until A=B (see figure 45)
Figure 46. H & V PIN adjustment 13. Enter to CORNER "G-CORNER" mode by pressing TV/VIDEO. 14. Adjust by pressing VOL right-left (see figure 47). 15. Press "7" then "ACTION" key on remote to save changes.
A
B
Figure 47. Corner adjustment 16. Enter to KEY "G-KEY" mode by pressing TV/ VIDEO. 17. Adjust by pressing CH up-down (see figure 48) 18. Press "7" then "ACTION" key on remote to save changes
A
B
Figure 45. Linear mode adjustment 8. Press "7" then "ACTION" key on remote to save changes. 9. Enter to PIN "G-PIN" mode by pressing "TV/ VIDEO". 10. Adjust V_PIN by pressing CH up-down (see figure 46). 11. Adjust H_PIN by pressing VOL right-left.
Figure 48. KEY mode adjustment Confirm that pattern looks like a square and almost overlaps the screen frame, check that vertical and horizontal line center match with the marks on screen frame, if linearity is not good enough, repeat adjustments. 19. Enter to "STATIC" mode by pressing TV/VIDEO. 20. Press "1" or "3" repeatedly until green and red only are shown.
Note:
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Service Manual
21. Adjust "R-STATIC" so that the center of red overlaps with the center of green.
38. Adjust B-STATIC so that the center of blue overlaps with the center of green (see figure 51).
red
green
blue
green
Figure 49. STATIC mode adjustment 22. Enter to SKEW "R-SKEW" mode by pressing TV/ VIDEO 23. Adjust "R-SKEW" so that the vertical and horizontal line of center overlaps with green (see figure 50) 24. Press "7" then "ACTION" key on remote to save changes.
Figure 51. B-STATIC adjustment 39. Perform all adjustments for blue (B-SKEW, BLINEAR, B-SIZE, B-PIN, B-CORNER, B-KEY) 40. Display border and cross pattern and confirm that blue overlaps with green pattern, if it is not satisfactory, repeat for blue. 41. Press "1 or 3" key repeatedly on remote until green, red and blue (white), confirm that red and blue overlaps with green pattern. 42. Press "7" key on remote, then ACTION to save changes. 43. Press POWER then ACTION to exit adjustments or press TV/VIDEO for at least 3 seconds to change to Fine Adjustment Mode.
Fine adjustment mode (FINE) (convergence)
Note: It is strongly recommended to first read and understand the following section prior to make any adjustment. Convergence adjustment must be perform for 480i-p (same for interlace & progressive), 1080i and ZOOM 480i.
Note:
25. 26. 27. 28.
29. 30. 31. 32. 33. 34. 35.
36. 37.
Figure 50. SKEW adjustment Remember always save data following each adjustment by pressing "7" key on remote, then ACTION. Enter to LINEARITY "R-LINEAR" mode by pressing TV/VIDEO. Adjust Horizontal linearity (see figure 45) Enter to SIZE "R-SIZE" mode by pressing TV/ VIDEO Adjust so that the line on the border closes to the screen frame at top, bottom, left and right (see figure 44) Enter to PIN "R-PIN" mode by pressing TV/VIDEO Adjust horizontally and vertically (see figure 46) Enter to CORNER "R-CORNER" mode by pressing TV/VIDEO. Adjust corners (see figure 47) Enter to KEY "R-KEY" mode by pressing TV/ VIDEO Adjust KEY (see figure 48) Display pattern of border and cross, then check that red overlaps green pattern, if it is not satisfactory, repeat from step 19. Enter to STATIC "B-STATIC" mode. Press "1 or 3" key repeatedly on remote until only green and blue pattern are displayed
Helpful hint: The easiest way to adjust convergence is to begin from the center of the screen, to the border in all the convergence adjustments. Remote functions: · 1, 3. . . . . . . . . . . . change color view adj · 2. . . . . . . . . . . . . . . . . . . change pattern · 7. . . . . . . . . . . . . . . . . . . . . . . .save data · 5. . . . . . . . . . . . . . . . . . . . . . . . . overlap · POWER . . . . . . . . . . . . . . . . . . . . .to exit · RECALL. . . . . . . . . . . . . . display values · R-TUNE . . . . . . . . . . . . . . . . cycle colors · TV/VIDEO . . . . . . . . . . . . change mode 3 secs . . . . . . . . change options · MUTE ("fine") . . . . . .cursor & data mode About pattern: · NTSC to adjust 480ip (same for interlace and progressive) · 1080i to adjust 1080i · 480i with ptv in zoom aspect to adjust Z480i
Service Manual
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In "FINE ADJUSTMENT MODE" options, press "MUTE" key on remote to switch between "cursor" mode and "data" mode. · Cursor mode (cursor flashing): Allows cursor movement by pressing VOL right - left and CH up - down. · Data mode (cursor fixed): Allows making adjustment by pressing VOL right - left and CH up - down. Procedure: 1. Enter to "G-EASY" mode (for green): · DAC EASY · Press POWER on remote · TV/VIDEO (repeatedly) · R-TUNE (repeatedly) 2. Press "2" repeatedly and apply the pattern of crosshatch. 3. Press "1 or 3" repeatedly until the pattern becomes green. 4. Press RECALL to display values. 5. In "EASY" mode, the adjustment value changes by 4 steps 6. EASY mode allows to move lines horizontally and vertically from the center of cursor.
10. To move the cursor press MUTE on the remote (cursor flashes), then move the cursor to any of the 9 positions for "EASY" mode(see figure 52) 11. This adjustment may help to make rounded lines become straight lines 12. Adjust to make lines as straight as possible 13. Enter to POINT "G-POINT" (for green) mode by pressing TV/VIDEO. 14. "POINT" mode allows to move line horizontally and vertically from the perimeter of cursor making rounded lines become straight (see figure 54) 15. In "POINT" mode, the adjustment data changes by 2 steps, See values on screen by pressing RECALL on remote.
Screen Frame
Cursor Flashess
cursor Figure 54. POINT & ORIG. POINT cursor positions 16. When the cursor is located in the outer area of the border the cursor starts to flash from one side to other and the adjustment is for the non-visible area (inside the ovals area, see figure 54); This applies to "LINE", "POINT" & "ORIGIN. POINT" modes. 17. Begin adjustment from the center to the edge of the screen. left/right
Figure 52. EASY adjustment cursor positions 7. This mode afects a wide area around the cursor than other adjustment modes, See values on screen by pressing RECALL on remote (see figure 53) 8. Begin adjustment from the center to the edge of the screen. 9. Adjust by pressing CH up/down and VOL right/left on the remote control when the cursor is not flashing, if the cursor is flashing press MUTE on the remote. left/right
up/down
Figure 55. POINT & ORIG. POINT adjustment 18. Adjust to make lines as much straight as possible 19. When slightly adjustment is needed, use "ORIG. POINT" mode. 20. To enter to "G-ORIG. POINT" (for green) mode press TV/VIDEO. 21. With "ORIG. POINT", the adjustment data changes by 1 step, this allows more detail in the adjustment. Display values on screen by pressing RECALL on remote - 31 Service Manual
up/down
Figure 53. EASY adjustment
22. Confirm that green adjustment is good enough, if adjustment is not satisfactory, repeat adjustments. 23. Enter to LINE "G-LINE" mode by pressing TV/ VIDEO. 24. LINE mode allows to move each single line horizontally and vertically (see figure 57). 25. Begin adjustment from the center to the edge of the screen (see figure 56) 26. Adjust to make distribute lines
34. Once the crosshatch pattern looks only white, perform the adjustments for White ("POINT", "ORIG. POINT" & "LINE"), notice that each adjustment is only for white (red, green, blue) 35. Adjust white for a good line distribution and make lines completely straight. 36. Press "7" key on remote, then ACTION to save changes. 37. Press POWER then ACTION to exit convergence adjustments (DACs menu appears).
Screen Frame
Figure 56. LINE adjustment cursor positions 27. Then press "1 or 3" on the remote until red and green appears.
Note:
Since convergence adjustment will not allows to adjust every single cross section of the grid, it is very important to adjust, so that overall looks best.
. left/right
up/down
Figure 57. LINE adjustment 28. Perform adjustments for red so that red overlaps green, do not move green. 29. Press "1 or 3" on the remote until yellow (red and green) and blue appears, do not move green or red. 30. Perform adjustments so that blue overlaps Yellow (red and green). 31. Press "1 or 3" key on remote to display red, green and blue (white). 32. At this point the crosshatch pattern should look white 33. If the crosshatch pattern is not only white, repeat adjustment for that color (red or blue) - 32 -
Service Manual
Horizontal and vertical size check
1. Apply a pattern that permits to check that horizontal and vertical proportion of the image is correct.
Panasonic
FORMAT
Note:
1080i, 480p, 480i pattern obtained from Panasonic's TU-DST51 set-top box DTV decoder.
Figure 58. H & V size check 2. Confirm that horizontal and vertical center of the picture is located in the center of the screen. 3. Check that the image is proportional horizontally and vertically, proportion is different on every aspect.
Convergence alignment template
The convergence alignment template is a grid approximately the size of the viewing screen used to ensure the proper size and shape of the alignment rasters. It is 6 blocks across by 6 blocks high. The grid dimensions vary with the mode of operation. Apply a convergence alignment template to the viewing screen of the PTV. Make sure the center lines are properly aligned. If a template is not available, one can be created by following the instructions below. Create a convergence alignment template by drawing a pattern, as in figure 59, in the actual dimensions on transparent film or tracing paper. Start with the Horizontal and Vertical Center Axis and work outwards until the pattern is complete. Pay attention to the actual dimensions of the pattern. Grid dimensions: 47" Models: 1036mm horizontal X 584mm vertical.
Note:
A convergence alignment template, part number TXFQD01ESER1 for 47", is available through Matsushita/Panasonic Services.
Center 3 2 1 1 2 3
3
2
1
Center
1
2
3
Figure 59. Convergence adjustment grid - 33 Service Manual
Service mode (electronic controls)
This receiver has electronic technology using the I²C bus concept. It performs as a control function and it replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control functions are now performed by using "on screen display menu". (The service adjustment mode.)
MODE 480I 4:3 480P 16:9 1080I DW SEPAH TINT CUT R I-ABL PCC V-S R-Y_A CUT B C_OFF EWCOR V-I HX WX MTSIN SEPAL MTS CLOCK CLOCK VIDEO COLOR B-Y_G BRIGHT CONT B DR R DR H POS H WID HDEF EWTRA H CORR VSIZE VLIN VDEF VSYM VCORR MUTE COARS CONV H-PAR V-SAW DAF HHS OTHER ACL
FINE V-PAR W-POS LIMIT
Note:
It is suggested that the technician reads all the way through and understand the following procedure for entering/exiting the service adjustment mode; then proceed with the instructions working with the receiver. When becoming familiar with the procedure, the flow chart for service mode may be used as a quick guide.
Figure 60. Service mode menu adjustments.
Note:
Quick entry to service mode:
When minor adjustments need to be done to the electronic controls, the method of entering the service mode without removal of the cabinet back is as follows using the remote control: 1. Select SET-UP icon and select CABLE mode. 2. Se