Panasonic PT-56WX52F, PT-56WX52CF, PT-53WX52F, PT-53WX52CF, PT-56WX42F User Manual

ORDER NO. MTNC020517A1

B2

Service Manual

d ie f i l p im S

HDTV MONITOR

Simplified Manual

(P7W)

Panasonic

Models	Chassis
PT-53WX52F	EP824
PT-53WX52CF	EP824
PT-53WX42F	EP824
PT-56WX52F	FP824
PT-56WX52CF	FP824
PT-56WX42F	FP824

PT-56WX52F

This Simplified Service Manual is issued to add listed models to the Simplified Service Manual order No.MTNC020411C1 (PT-47WX52F). Included in this manual are 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. MTNC020411C1 (PT-47WX52F).

“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.

General guidelines

Safety precautions

An isolation transformer should always be used

antenna terminals, control shafts, etc. If the exposed

during the servicing of a PTV whose chassis is not

metallic part has a return path to the chassis, the

isolated from AC power line. Use a transformer of

reading should be between 240kΩ and 5.2MΩ. If the

adequate power rating as this protects the technician

exposed metallic part does not have a return path to

from accidents resulting in personal injury from

the chassis, the reading should be infinite.

electrical shocks. It will also protect the PTV from being

Leakage current hot check (see figure 1)

damaged

by

accidental

shorting

that

may

occur

Plug the AC cord directly into the AC outlet. Do not use

during servicing.

an isolation transformer during the check.

When servicing, observe the original lead dress,

Connect a 1.5kΩ 10 watt resistor in parallel with a

especially in the high voltage circuit. Replace all

0.15µF capacitor between and exposed metallic part

damaged

parts

(also

parts

that

show

signs

of

and

ground.

Use

earth

ground,

for

example

a

overheating.)

water pipe.

Always

replace

protective

devices,

such

as

Using a

DVM

with

a 1000

ohms/volt

sensitivity

or

fishpaper,

isolation

resistors

and

capacitors,

and

higher, measure the AC potential across the resistor.

shields

after

servicing

the

PTV.

Use

only

Repeat

the procedure and

measure

the

voltage

manufacturer’s recommended rating for fuses, circuits

present with all other expose metallic parts.

breakers, etc.

Verify any potential does not exceed 0.75 volt RMS. A

High potentials, as high as 32.5kV, are present when

leakage current tester (such a Simpson model 229,

this PTV is operating. Operation of the PTV without the

Sencore model PR57 or equivalent) may be used in

rear cover introduces

danger

for

electrical

shock.

the

above procedure, in

which

case

any

current

Servicing should not be performed by anyone who is

measure

must

not

exceed

0.5

milliamp.

If

any

not thoroughly familiar with the necessary precautions

measurement is out of the specified limits, there is a

when servicing high-voltage equipment.

possibility of a shock hazard and the PTV must be

Extreme care should be practiced when handling the

repaired

and

rechecked

before

it

is

returned

to

picture tube. Rough handling may cause it to implode

the customer.

due to atmospheric pressure. (14.7 lbs. per sq. in.). Do

AC VOLTMETER

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

COLD

tube by shorting the anode to chassis ground (not to

WATER

the cabinet or to other mounting hardware). When

PIPE

(GROUND)

discharging connect

cold

ground

(i.e. DAG

ground

0.15µF

lead) to the anode with a well insulated wire or use a

grounding probe.

X-ray precautions

TO INSTRUMENT’S

1500Ω,10W

The front area (between the projection tube and the

EXPOSED METAL

lens) is enclosed by a metal box to ensure positive

PARTS

safety during normal and abnormal conditions when

Figure 1. Hot check circuit

checking and repairing. To fully ensure safety, the

Insulation test

following precautions must be observed.

1. Do not remove the lens or metal box.

Connect an insulation tester between an exposed

2. Make sure to turn the power OFF when the lens is

metallic part and AC line.

removed or when checking the cleanliness of the

Apply 1080VAC/60Hz for 1 second. Confirm that the

lens.

current measurement is 0.5mA ~ 2.0mA. Repeat test

with other metallic exposed parts.

3. Do not remove the lens or metal box to check the

X-ray radiation

projection tube for operation by watching it directly.

Use a mirror or paper to view the image.

WARNING: The potential source of x-ray radiation in the

Before returning a serviced PTV to the owner, the

PTV is in the high voltage section and the picture tube.

service technician must thoroughly test the unit to

Note: It is important to use calibrated equipment.

ensure that is completely safe to operate. Do not use a

Apply all black video signals (1080i) and confirm high

line isolation transformer when testing.

voltage measures 31.5 ± 1.0kV. If the high voltage is

Leakage current cold check

not within the range, change C514 to 1800pF, 2000pF,

Unplug the AC cord and connect a jumper between the

2400pF or 2700pF until the desired value is obtained.

two plug prongs. Press the POWER switch ON.

Apply NTSC white pattern and confirm the high voltage

Measure the resistance between the jumpered AC plug

measures 30.1 ± 1.5kV.

and expose

metallic

parts such

as screw

heads,

Apply HD 1080I white pattern and confirm the high

voltage measures 30.1 ± 1.5kV

Service Manual	- 2 -

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” or a leaf symbol stamped on the back of PCB.

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)

component	component
pin
remove all of the
excess solder

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

- 3 -	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	Anode lead
	rubber cap	3
	2	Discharge to
		CRT chassis
	Push & rotate
	cap counter-
	clockwise
	to remove
		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
-
+
H.V. METER	CRT
	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 figure 4)

		TPD51 TPD50	D-Board
		-
		+
	DVM
		MA150	D-Board
		100Ω 1/2 W
	Variable	(+)	IC802 PIN 2
			OR TPD8
	power	(15~25DC)	HEAT SINK OF Q551
	supply	(-)

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.

Service Manual	- 4 -

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

Service notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Leadless chip component. . . . . . . . . . . . 6 Component removal . . . . . . . . . . . . . . . . 6 Chip component installation . . . . . . . . . . 6 How to replace Flat-IC . . . . . . . . . . . . . . 6

Feature table . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Boards designation . . . . . . . . . . . . . . . . . . . . . . 9 PTV - Location of controls . . . . . . . . . . . . . . . 10

Quick reference control operation . . . . 10

Convergence Alignment . . . . . . . . . . . . . . . . . 11

Convergence Alignment Template . . . . 11

Disassembly for service . . . . . . . . . . . . . . . . . 12

PTV Screen Preparation. . . . . . . . . . . . 12 Placement of Screens in

PTV screen frame . . . . . . . . . . . . . 13 Frame and Customer Control

Panel Installation . . . . . . . . . . . . . . 14 Cabinet back lower cover removal . . . . 15 Cabinet Top and Mirror

Panel Installation . . . . . . . . . . . . . . 17 Parts list . . . . . . . . . . . . . . . . . . . . . . . . 18 Abbreviations Guide . . . . . . . . . . . . . . . 27

- 5 -	Service Manual

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 1.6kΩ resistor, 0 = 0Ω (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.

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.

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.

TYPE					Chip components			SOLDER
						GRADE		CAPS
					c
	b
	b
			e
			e	TRANSISTOR			CAPACITOR

1ST DIGIT	2ND DIGIT

COMMON

CATHODE

MULTIPLIER =1600 = 1.6k

ANODES	SOLDER
	CAPS
MH DIODE	RESISTOR

How to replace Flat-IC

- Required tools -

•	Soldering iron	•	De-solder braids
•	Sharp pliers (wire	•	Magnifier
	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.

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

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

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.

		De-Solder
		Braid
	Solder	Soldering
	Bridge
		Iron

Service Manual	- 6 -

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.

- 7 -	Service Manual

Feature table

FEATURE		PT-53WX52F	PT-53WX42F		PT-56WX52F	PT-56WX42F
		PT-53WX52CF			PT-56WX52CF
Chassis				P7W
Number of channels				181
Menu language			Eng/Span/Fr
Closed caption (CC)				X
V-Chip (USA/CANADA)				X
Picture in Picture (PIP)			2T split
VIDEO INPUT MEMORY/SKIP				SKIP
2RF				X
Remote control number		EUR7603Z30	EUR7603Z40		EUR7603Z30	EUR7603Z40
Screen protector		W/PROT SCRN	W/O PROT		W/PROT SCRN	W/O PROT
			SCRN			SCRN
Comb filter			ADV 3D Y/C (NEW)
HEC/VEC (X=BOTH)				X
Color temp				X
NEW YNR				X
VM			X (DIGITAL)
V/A norm (X=BOTH)				X
DIGITAL SCAN RATE			1080i, 480p
NTSC LINE-DOUBLER			480p SMOOTH PROGRESSIVE
AIP				X
PRESET/INPUT LABELING				X
Video Picture Memory				X
MTS/SAP/DBX				X
Bass/Bl/Treb control				X
AI sound				X
SURROUND				X
Spatializer/BBE				BBE
Built-in audio power		15WX2 (10%)	10WX2 (10%)		15WX2 (10%)	10WX2 (10%)
Number of speakers		4	2		4	2
A/V in (rear/front)				4 (3/1)
A/V PROGRAM OUT				X
S-VHS in (rear/front)				2/1
Audio out			Fixed & Variable
COMPONENT INPUT (Y, Pb, Pr)				2
Dimensions	mm	1247.7x634.4x1306.3			1316x849x1401
WxDxH	in	49.12x24.97x51.43			51.42x33.42x55.15
Weight (kg/lbs)		83/182.98	80.25/183.54		116/255.73	110/242.50
Power source (V/Hz)			120V 60Hz
Anode voltage			31.5kV±1.0kV
Video input jack			1Vp-p 75Ω, phono jack
Audio input jack			500mV RMS 47kΩ

Table 1: Feature Table

Specifications are subject to change without notice or obligation.

Dimensions and weights are approximate.

Service Manual	- 8 -

Boards designation

BOARD	PART NUMBER	BOARD DESCRIPTION
A-Board	TNP2AH035	signal processing
D-Board	TNPH0371	power and deflection
LB-Board	TNP2AA110	blue driver
LG-Board	TNP2AA111	green driver
LR-Board	TNP2AA112	red driver
G-Board	TNP2AA090	front A/V panel
K-Board	TNP2AA089	front button panel
R-Board	TNPA0615AB	IR receiver
	Table 2: Boards designation

Note: The A-Board (TNP2AH035) is non-serviceable. Except for A-Board both tuners, IC1004, IC2302, IC7001, IC7002, IC7102, IC871, IC872, IC873. If any of these components or board is defective replace 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.

- 9 -	Service Manual