Panasonic PT-56LCX70 - 56" Rear Projection TV Bedienungsanleitung

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distribution is a violation of law.

PT-56LCX70

PT-61LCX70

PT-50LCX7

PT-56LCX7

PT-61LCX7

PT-50LCX7K

PT-56LCX70-K

PT-61LCX70-K

Vol. 1

Multi Media Display

ORDER NO. MKE0706850CE

1 Safety Precautions 3

1.1. General Guidelines 3

1.2. Leakage Current Cold Check 3

1.3. Leakage Current Hot Check 3

1.4. Disposal Lamp 3

2 Warning 4

2.1. Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices 4

3 Service Navigation 5

3.1. Introduction 5

3.2. About Lead Free Solder (PbF) 5

4 Specifications 6

5 Service Mode 7

6 Troubleshooting Guide 19

6.1. Troubleshooting Hints for Block Level Repair 19

7 Disassembly and Assembly Instructions 33

7.1. Cabinet Section 33

8 Measurements and Adjustments 54

8.1. Adjustment Procedures 1 54

9 Maintenance 57

9.1. Cleaning Methods 57

10 Voltage Chart and Waveform of Connectors 58

11 Block Diagrams 61

12 Schematic Diagrams 63

12.1. SCHEMATIC DIAGRAM & CIRCUIT BOARD LAYOUT

NOTES 63

12.2. INTERCONNECTION SCHEMATIC DIAGRAM 64

12.3. POWER SCHEMATIC DIAGRAMS 65

12.4. SD/HDMI SCHEMATIC DIAGRAM 66

12.5. REAR JACK SCHEMATIC DIAGRAM 67

12.6. FRONT JACK/OPERATION / POWER SWITCH / TUNER

SCHEMATIC DIAGRAM 72

12.7. RF AMP POWER SUPPLY SCHEMATIC DIAGRAM 73

13 Printed Circuit Board 75

13.1. POWER P.C.B. 75

13.2. SD/HDMI P.C.B. 76

13.3. REAR JACK P.C.B. 77

13.4. FRONT JACK/OPERATION P.C.B. / TUNER P.C.B. /

POWER SWITCH/OPERATION P.C.B. 78

14 Exploded Views 79

14.1. MAIN PARTS SECTION 79

14.2. BASE BODY SECTION 81

14.3. DISPLAY SECTION 82

14.4. SCREEN SECTION 84

14.5. OPT/TV UNIT SECTION 86

14.6. LAMP UNIT SECTION 87

14.7. PACKING PARTS AND ACCESSORIES SECTION 88

15 Replacement Parts List 89

15.1. REPLACEMENT NOTES 89

15.2. MECHANICAL REPLACEMENT PARTS LIST 90

15.3. ELECTRICAL REPLACEMENT PARTS LIST 91

16 Schematic Diagrams for Printing with Letter Size 97

CONTENTS

Page Page

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

1 Safety Precautions

1.1. General Guidelines

1.For continued safety, no modification of any circuit should

be attempted.

2.Disconnect AC Plug before disassembling this unit.

3.It is advisable to use an isolation transformer in the AC

supply before servicing.

4.When servicing, observe the original lead dress. If a short

circuit is found, replace all parts which have been

overheated or damaged by the short circuit.

5.After servicing, see to it that all the protective devices such

as insulation barriers, insulation papers, shield, and

isolation R-C combinations etc. are properly installed.

6.After servicing, be sure to restore the wires, leads,

insulation barriers, shields, etc.

7.After servicing, make the leakage current checks to prevent

the customer from being exposed to shock hazards.

Caution:

Use a separate Isolation Transformer for this unit when

servicing.

1.2. Leakage Current Cold Check

1.Unplug the AC cord and connect a jumper between the two

prongs on the plug.

2.For physically operated power switches, turn power on.

Otherwise skip step 2.

3.Measure the resistance value, with an ohmmeter, between

the jumpered AC plug and each exposed metallic cabinet

part on the receiver, such as screwheads, connectors, etc.

When the exposed metallic part has a return path to the

chassis, the reading should be between 1 MΩand 12 MΩ.

When the exposed metal does not have a return path to the

chassis, the reading must be infinity.

1.3. Leakage Current Hot Check

1.Plug the AC cord directly into the AC outlet.

Do not use an isolation transformer for this check.

2.Connect "A" to exposed metallic part on the set. And

connect "B" to a good earth ground, as shown in Figure 1.

3.Use an AC voltmeter, with 1 kΩ/V or more sensitivity, to

measure the potential across the resistor.

4.Check each exposed metallic part, and measure the

voltage at each point.

5.Reverse the AC plug in the AC outlet and repeat each of the

above measurements.

6.The potential at any point should not exceed 0.25 V RMS.

A leakage current tester (Simpson Model 228 equivalent)

may be used to make the hot checks. Leakage current must

not exceed 1/2 mA. In case a measurement is outside of

the limits specified, there is a possibility of shock hazard,

and the receiver should be repaired and rechecked before

it is returned to the customer.

Figure 1

1.4. Disposal Lamp

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

2 Warning

2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically

Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called

Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and

semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage

caused by electro static discharge (ESD).

1.Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your

body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,

which should be removed for potential shock reasons prior to applying power to the unit under test.

2.After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as

aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3.Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4.Use only an antistatic solder removal device. Some solder removal devices not classified as "antistatic (ESD protected)" can

generate electrical charge sufficient to damage ES devices.

5.Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6.Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most

replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable

conductive material).

7.Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material

to the chassis or circuit assembly into which the device will be installed.

CAUTION :

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8.Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the

brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)

sufficient to damage an ES device).

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

3 Service Navigation

3.1. Introduction

This service manual contains technical information which will allow service personnel´s to understand and service this model.

Please place orders using the parts list and not the drawing reference numbers.

If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service

manual.

3.2. About Lead Free Solder (PbF)

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

4 Specifications

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

5 Service Mode

LAMP Indicator

POWER Indicator

Abnormal voltage (POWER+17V line)

Error Information

Priority

LAMP OFF

RESET

LAMP Indicator

flashes red

SOS

(Note 1)

(Note 2)

POWER Indicator

flashes orange

Note:

1. The detected Error data will be stored in the EEPROM, and SOS History (Code) is displayed in Self Check mode

or Service Adjust mode (SRV-TOOL).

2. The Lamp Indicator will flash X5 immediately after the Lamp goes off. For this SOS only, the TV power will remain on.

ON/OFF

Power

ON/OFF

Power

ON/OFF

Over voltage/Over current (SOS) 01

Abnormal voltage (DTV+9V line)

Abnormal voltage (SUB+5V line)

Abnormal voltage (MAIN+3.3V line) -

Communication error between Peaks (IC8001)

and TV Microcontroller (IC6004)

Communication error between Peaks (IC8001)

and TV Microcontroller (IC6004)

Lamp does not light up

Lamp failure

Abnormal Lamp temperature

Lamp communication error

IC4501 (Audio Amp) failure

Lamp Fan stops

Fan Case Unit (OPT Fan) stops

Front Fan or Rear Fan stops

Rear Fan or Front Fan stops

Rear Jack PCB connection error

Abnormal Lamp input voltage (+28V)

INDICATIONS FOR ERROR CONDITIONS

Each Indicator facilitates finding the cause of an error.

When an error is detected, the Lamp goes off and the indicators on the front flash.

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

MAIN PARTS LOCATION

Fan Case Unit

(OPT Fan)

Thermal Fuse

Air Filters

OPT/TV Unit

Front Cover Unit

Front Jack

/Operation P.C.B.

Power Switch

/Operation P.C.B.

SD/HDMI P.C.B.

LAMP LED

POWER LED

Front Door

Rear Cover

Main P.C.B.

Tuner P.C.B. Rear Jack P.C.B.

Power P.C.B.

RF AMP

Power Supply P.C.B.

Lamp Unit

Lamp Fan

Top Duct Unit

Front Fan

Rear Fan

Support

Shield

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

SELF CHECK

In this mode, the following information can be confirmed on the

screen:

- Peaks software version and EEPROM data version

- Communication check between Peaks IC and each ICs

- SOS History

Self Check

Enter:

VOLUME DOWN button + OK key

(for more than 3 seconds in power on condition)

Exit:

Unplug the AC cord.

SELF CHECK 0.480

00.16

MEM2 OK

ADV

VSW

ADAV

ASW

TUN1

TUN2

GenX4

MEM1

SOS POWER: 02 04

SOS LAMP : 08 09 0A 0B

VOL

(on the front)

_(on the remote)

PEAKS internal check

AD/HDMI Interface

Video SW

Audio DSP

Audio SW

Tuner PLL block

Tuner MTS block

Demodulator

TV Microcontroller

GenX4 EEPROM

Peaks EEPROM

(Communication check for I2C bus)

Display Item

ICs Description

IC8001

IC5510

IC3001

IC4001

IC4101

TU8201

IC8802

IC6004

IC6005

IC8201

ADV

VSW

ADAV

ASW

TUN1

TUN2

GenX 4

MEM1

MEM2

SOS POWER: 02 04

SOS LAMP : 08 09 0A 0B

Note:

If the same SOS error occurs more than once, only one

code will be displayed.

SOS History

The number of time

Power Indicator flashed

: 01 ~ 09

The number of time

Lamp Indicator flashed

: 02 ~ 0D

*2. Communication check results (OK or NG) between Peaks

IC8001 and each of the following ICs.

*3. SOS History

*1. Peaks software version and Peaks EEPROM data version

Peaks software version

Peaks EEPROM data version

SELF CHECK 0.480

00.16

To clear SOS History, use the following Self Check-2

mode.

The SOS History and all memory function will be reset by

Self Check-2.

Self Check-2

Enter:

VOLUME DOWN button + MENU key

(for more than 3 seconds in power on condition)

Exit:

Unplug the AC cord.

SELF CHECK 0.480

00.16

MEM2 OK

ADV

VSW

ADAV

ASW

TUN1

TUN2

GenX4

MEM1

SOS POWER: 02 04

SOS LAMP : 08 09 0A 0B

SOS History will be cleared

after it is displayed.

(on the front)

(on the remote)

Fig. 1-1

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

SERVICE ADJUST MODE

In this mode, the following information can be confirmed on the

screen:

MMD-CHK

- Focus, Tilt, H/V Picture Position adjustment

- Internal pattern for LCD-CHK, GC-CHK

Fig. 2-1

Service Adjust Mode

Enter:

VOLUME DOWN button + RECALL key (3 times)

(in power on condition)

Exit from Main Menu:

Power OFF.

RECALL (X3)

VOL

(on the front)

(on the remote)

SRVICE

ADJUST

WB-ADJ

OPTION

RM-SET

SRV-TOOL

MMD-CHK

<MMD-CHK 1/8>

MMD-CHK

FREQ

1,2:MAIN SELECT

3,4:SUB SELECT

9 :PICTURE MENU SELECT

VOL:ADJUST

VIVID

1 key2 key

CAUTION:

Do not change any parameters!

Peaks SOFT

Peaks EEP

LSI DATA

GenX SOFT

GenX EEP

GenX ROMCOR

FACTDATA

0.480

0.16

0.00.5b

0.15.60

0.00.00

12FF-FFFF

SRVICE

ADJUST

WB-ADJ

OPTION

RM-SET

SRV-TOOL

MMD-CHK

Peaks software

version

Peaks EEPROM

data version

TV Microcontroller

EEPROM data version

TV Microcontroller

software version

Peaks SOFT

Peaks EEP

LSI DATA

GenX SOFT

GenX EEP

GenX ROMCOR

FACTDATA

0.480

0.16

0.00.5b

0.15.60

0.00.00

12FF-FFFF

PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

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