ORDER NO. MTNC010631A1
B2
Service Manual
HDTV MONITOR
d ie plif 
Sim
Simplified Manual
P5PW
Panasonic
Models |
Chassis |
PT65WX51E |
EP820 |
PT56WX51E |
EP820 |
PT56WX51CE |
EP820 |
PT-65WX51E
This Simplified Service Manual is issued to add listed models to the Simplified Service Manual order No. MTNC010522A1 (PT-47WX51E). Included in this manual are schematics that are unique to the listed models, unique disassembly procedures, and a complete parts list for the serviceable boards are included in this Simplified Manual. Please file and use this manual together with Simplified Service Manual, order No. MTNC010522A1 (PT-47WX51E).
“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 this Manual.
Copyright 2001 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 that 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 be 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 32kV, 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 Fig. 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 0.15mF 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.
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.
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,
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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 Lion Head Pattern and confirm the high voltage measures 30.1 ± 1.5kV.
Apply HD 1081I Monoscope Pattern and confirm the high voltage measures 30.1 ± 1.5kV
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 Fig. 2).
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Grasp protective |
Anode lead |
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rubber cap |
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Discharge to |
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CRT Chassis |
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Push & rotate |
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cap counter- |
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clockwise |
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to remove |
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FBT Distributor |
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Figure 2. Removal of FBT leads |
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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 an NTSC signal generator to the
antenna terminal.
3. Connect DVM (+) TPD50 and (-) TPD51 on D Board. (See Fig. 4)
Cold Ground |
FBT Distributor |
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+ |
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H.V. METER |
CRT |
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CHASSIS |
Figure 3. Measuring H.V.
4. Connect a H.V. meter (static type, class 0.1) with high voltage leads to high voltage distributor on FBT. (See Fig. 4)
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TPD51 TPD50 |
D-Board |
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DVM |
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MA150 |
D-Board |
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100Ω 1/2 W |
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Variable |
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IC802 PIN 2 |
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OR TPD8 |
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Power |
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HEAT SINK OF Q551 |
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Supply |
(-) |
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Figure 4. DVM & Power supply connection.
Connect the 15 ~ 25 V DC variable power supply to (+) TPD8 or IC802 pin 2 (D-Board) and (-) heat sink of Q551 (See Fig. 4).
Procedures:
1.Apply a monoscope 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.
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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
Important Safety Tests . . . . . . . . . . . . . . . . . . . . 3
Measuring H.V. . . . . . . . . . . . . . . . . . . . . 3 (EHT) Protector Operation Check . . . . . . 3 Leadless Chip Component
(surface mount) . . . . . . . . . . . . . . . . . 5 Component Removal. . . . . . . . . . . . . . . . 5 Chip Component Installation . . . . . . . . . . 5 How to Replace Flat-IC . . . . . . . . . . . . . . 5
Feature Table . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 PCBs Designation . . . . . . . . . . . . . . . . . . . . . . . 7 PTV - Location of Controls . . . . . . . . . . . . . . . . 8
Quick Reference Control Operation . . . . 8
Remote - Location of Controls
Basic Operation . . . . . . . . . . . . . . . . . . . . . . 9 Disassembly for Service . . . . . . . . . . . . . . . . . 10 PTV Frame Assembly. . . . . . . . . . . . . . . . . . . . 10 PTV Screens Preparation. . . . . . . . . . . . . . . . . 11
Placement of Screens in PTV
Screen Frame . . . . . . . . . . . . . . . . . . . . . . . 12
Frame and Customer Controls
Panel Installation . . . . . . . . . . . . . . . . . . . . 13 Cabinet Top and Mirror Panel Installation . . . 14
G, K-Board schematics. . . . . . . . . . . . . . . . . . . . 25 G, K-Board PCBs . . . . . . . . . . . . . . . . . . . . . . . .26
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Service Notes
Note: Some components may be affixed with glue. Be careful not to break or damage 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 chips, 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 resistors have a three-digit numerical resistance code - 1st and 2nd significant digits and a multiplier. Example: 162 = 1600 or 1.6kW resistor, 0 = 0W (jumper).
Chip capacitors generally do not have the value indicated on the capacitor. The color of the component indicates the general range of the capacitance.
Chip transistors are identified by a two-letter code. The first letter indicates 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.
Component Removal
7.Use solder wick to remove solder from component end caps or terminal.
8.Without pulling up, carefully twist the component with tweezers to break the adhesive.
9.Do not reuse removed leadless or chip components since they are subject to stress fracture during removal.
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 watt iron until solder flows. Do not apply heat for more than 3 seconds.
Chip Components
How to Replace Flat-IC - Required Tools -
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Soldering iron |
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De-solder braids |
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Needle nose pliers |
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Magnifier |
• Wire cutters (sharp & small) |
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1.Cut the pins of a defective IC with wire cutters. Remove IC from board. If IC is glued to the board, heat the IC and release the IC. See Note above.
Flat IC
2.Using soldering iron and needle nose pliers remove the IC pins from the board.
Soldering
Iron
3.Using de-soldering braid and soldering iron remove solder from affected are on board (pads).
De-soldering
Braid
Soldering
Iron
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). Determine the positions of the soldering pads and pins by correctly aligning the polarity symbol. Solder pin #1 first, align the IC.
Polarity |
2nd solder |
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1st solder |
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symbol |
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Solder the pin opposite to pin #1. This will assist positioning the IC.
5.Solder all pins to the soldering pads using a fine tipped soldering iron.
Solder
Soldering
Iron
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.
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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.
Feature Table
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FEATURE |
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PT-65WX51E |
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PT-56WX51E/CE |
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Chassis |
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EP820 |
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Tuning system |
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256K |
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# of channels |
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181 |
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Menu language |
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Eng/Span/Fr |
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Closed Caption |
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X |
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V-Chip (USA/CANADA) |
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X |
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Picture in Picture |
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2 Tuner |
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Split Screen |
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2RF |
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Comb Filter |
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3D Y/C |
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HEC / VEC Corrector |
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Both |
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VM |
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X |
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V/A Norm - Both |
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Both |
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Color Temperature |
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X |
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MTS/SAP/DBX |
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X |
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AI Sound |
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X |
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Bass/Bl/Tre Control |
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X |
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Surround |
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X |
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BBE |
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X |
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Built-in audio power |
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15W / CH (10%) |
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# of speakers |
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4 |
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A/V in (rear/front) |
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4 (3 / 1) |
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A/V Program Out |
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X |
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S-VHS Input (rear/front) |
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2 / 1 |
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Component Input |
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2 |
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Audio Out (FAO & VAO) |
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Dolby Center Channel In |
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Dimensions |
mm |
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1501x757x1545 |
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1316x682x1401 |
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(WxDxH) |
in |
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59.1x29.8x60.8 |
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51.8x26.9x55.2 |
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FEATURE |
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PT-65WX51E |
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PT-56WX51E/CE |
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Weight (kg/lbs) |
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126.5/277.78 |
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116/255.7 |
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Power source (V/Hz) |
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120 / 60 |
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Anode voltage |
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31.5 ± 1.0kV |
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Video input jack |
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1Vp-p |
75Ω, phono jack |
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Audio input jack |
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500mV RMS 47kΩ |
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Table 1: PTV Feature Table
Specifications are subject to change without notice or obligation.
Dimensions and weights are approximate.
PCBs Designation
BOARD |
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PART NUMBER |
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BOARD DESCRIPTION |
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PT-56WX51E/CE |
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PT-65WX51E |
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MAIN CHASSIS, VIDEO |
A-Board |
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TNPH0370AD |
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PROCESSING, CONVERGENCE, |
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AUDIO PROCESSING |
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D-Board |
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TNPH0371 |
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POWER SUPPLY, VERTICAL |
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OUT, HORIZONTAL OUT |
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DH-Board |
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TNPA2033 |
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PIP PROCESSING, SPLIT, |
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SEARCH, FORMATS |
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G-Board |
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TNP2AA090 |
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TNP2AA092 |
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Front A/V Connections |
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K-Board |
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TNP2AA089 |
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TNP2AA091 |
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Customer Controls (Keyboard) |
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LR-Board |
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TNPA1810 |
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RED CRT Drive |
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LG-Board |
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TNPA1811 |
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GREEN CRT Drive |
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LB-Board |
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TNPA1812 |
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BLUE CRT Drive |
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R-Board |
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TNPA0615AB |
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IR Sensor |
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Table 2: PCB Designation |
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Note: The A-Board (TNPH0370ADS) and DH-Board (TNPA2033S) are Non-Serviceable. The Tuners, IC2302, IC7001, IC7002 and IC870 are replaceable. If any other components on the A-Board or DH-Board are defective, replace the entire board with a new one.
Notice: When ordering any Board, add and” S” after the B oard suffix application for all models.
Example: If Order A-Board, should be ordered as: TNPH0370ADS.
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PTV - Location of Controls
PT-65WX51E
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.
2Volume - 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
3when menus are displayed. Also use to select Cable Converter box channels after programming Remote Control Infrared codes (the TV/AUX/CABLE switch must be set in CABLE position).
4Action - Press to display Main Menu and access On Screen feature and Adjustment Menus.
5TV/Video - Press to select TV or one of two Video Inputs, for the Main Picture or the PIP frame (when PIP frame is displayed).
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Remote - Location of Controls-Basic Operation
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 |
EUR7603Z40 |
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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
For additional information for this remote please refer to the Remote Guide, listed on the parts list.
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