Mitsubishi PD-5050 Service Manual

20042004

2004

20042004

MITSUBISHI ELECTRIC

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Manual

ManualManual

PLASMA DISPLAY PANEL

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PD-5050

CAUTION:

Before servicing this chassis, it is important that the service person read the "SERVICE SAFETY" section in this manual.

SPECIFICATIONS

• Power : AC 120V, 50/60Hz

480W (Typical)

6.4A (Maximum)

• Signals

Sync Range : Horiz : 15.5 to 110kHz

(Automatic : step scan)

: Vert : 50.0 to 120 Hz

(Automatic : step scan)

Input Signals : RGB, HD*

DVD*

• Input Terminals RGB : Visual 1 (Analog) : Mini D-sub 15-pin

Visual 2 (Analog) : BNC (R,G,B,H/CS,V)* Visual 3 (M-LINK) : MONITORLINK

Video : Visual 1 : BNC

Visual 2 : RCA-pin Visual 3 : S-Video: DIN 4-pin

DVD/HD/DTV : Visual 1 : RCA-pin (Y,PB[CB},PR{CR])*

Visual 2 : BNC (Y,PB[CB},PR{CR])*1 *

Visual 3 (M-LINK) : MONITORLINK Audio : Stereo RCA x 3 (Selectable) External Control : D-sub 9-pin MONITORLINK

, DTV*

(RS232C)

(HDMI)

• Sound Output : 9W+9W at 6 ohms

• Dimensions : (W)48.1" (H)30" (D)3.8"

(W)1222 (H)736 (D)96 mm

• Weight : 98 lbs / 44.5 kg

HD/DVD/DTV Input Signals supported:

480P (60Hz) 480I (60Hz)

525P (60Hz) 525I (60Hz) 576P (50Hz) 576I (50Hz) 625P (50Hz) 625I (50Hz) 720P (60Hz) 1035I (60Hz)

1080I (50Hz) 1080I (60Hz)

The 5-BNC connectors are used as RGB/PC2 and HD/DVD2 input. Select one of them under "BNC SELECT".

• Weight and dimensions shown are approximate.

• Design specifications are subject to change without notice.

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Road, Irvine, CA 92618-1904

1-1

CONTENTS

SERVICE SAFETY..................................................................................................................... 2-1

TROUBLESHOOTING ............................................................................................................... 3-1

METHOD OF ADJUSTMENTS .................................................................................................. 4-1

METHOD OF DISASSEMBLY ................................................................................................... 5-1

PARTS LIST ............................................................................................................................... 6-1

CONNECTION DIAGRAM ........................................................................................................ 7-1

CONNECTOR PIN EXPLANATION .......................................................................................... 8-1

BLOCK DIAGRAM ..................................................................................................................... 9-1

1-2

■Safety cautions

SERVICE SAFETY

2-1

The matters to be observed without fail are explained below. These matters are indispensable for the prevention of an accident during the maintenance servicing, the “security of products” after the completion of servicing work, and the “prevention of the repeated occurrence of similar fault.”

(1) The degree of danger and material damage, caused as a result of wrong use by disregarding the contents

of the display” is distinguished and explained in the table below.

WARNING

CAUTION

(2) Kinds of the matters to be observed are classified and explained in the icons shown below.

This icon indicates a dangerous place where an electric shock is anticipated.

This icon indicates the contents of “caution” that must be borne in mind, without fail.

This icon indicates the contents of “caution” that must be practiced, without fail.

If this display is disregarded and equipment is handled wrongly, this can be a cause of physical injury and a fire, thus leading a person to death or serious injury.

If this display is disregarded and equipment is handled wrongly, this may lead to personal injury or material damage.

WARNING

• Observe the caution matter, without fail.

• Be careful of an electric shock or a burn.

• Modification of equipment is absolutely prohibited. Use the specified parts at all times.

• The replaced parts and wiring must be arranged in the original conditions.

• In the place where a particular caution is needed during maintenance servicing, such a caution note is displayed with a label or a stamp that is given to the cabinet, chassis, PWB, etc. These caution notes and also the caution matters of the instruction manuals, etc., must be observed, without fail.

• The power block or the PDP module involves the sections where high voltage or high temperature is prevalent. When equipment is energized, use working gloves in order to prevent an electric shock or a burn. At the time of transportation, disassembly, reassembly, and the replacement of parts, such a servicing job must be done after pulling out the power plug.

• If any modification is performed, the validity of the manufacturer’s warranty is lost at that moment. The personnel who did this modification is responsible for the physical injury or the like, if it should occur as a result of the modification. The parts used are given the safety-based characteristics, such as non-flammability or sufficient withstand voltage. The parts to be replaced shall be those which are specified in the list of replacement parts.(Example: The lithium battery (circuit symbol BA9501 in the MAIN PWB) will give rise to explosion if its polarity is wrongly treated.

• For safety reasons, insulation materials like tubes and tapes may be used or some parts may be mounted clear of the PWB. The internal wiring and the fastening with the clampers for separation from high-heat and high-voltage parts shall be returned to their original conditions, without fail.

given in

WARNING

2-2

• For the maintenance servicing, safety inspection is needed in accordance with the check list.

• Inspection should be carried out according to the check list shown below, in regard to safety inspection before and after repairing, authentic repair, and explanation to the user.

(Method of insulation check)

Mount a PDP module on the product to complete it. After the completion of aging and others, pull out the power plug from the wall outlet, remove the cable, and turn on the power switch. Use a 500V megger (Note 1) and confirm that the insulation resistance is 50M. or more between each terminal (except for the 3-core earth terminal) of the power plug (Note 2) and the external exposed metallic parts (Note 3). If the insulation resistance is found to be below the specified value, recover the faulty section and make another insulation check again.

(Note 1) If a 500V megger is not available at that time, use a circuit tester or the like. (Note 2) In the case of a 3-core terminal, the earth resistance shall be 1Ω or less

between the earth terminal and the earth side of each input terminal.

(Note 3) Head phone jack, speaker terminals, remote control terminals, each I/O

terminals, control terminals, screws, etc.

Check item Check column

Is there any influence by high temperatures (due to direct sunlight, etc.), moisture (steam, etc.), oil fume, dust, and dew condensation?

Is the condition of ventilation acceptable (distance to the wall, ventilation holes, etc.)? Is the condition of the antenna acceptable (reach to the wire, bend, tilt, etc.)?

conditions

Is the condition of power supply acceptable (regular outlet, adequate earthing, concentrated wiring, etc.)?

Installation

repairing

Safety inspection before

Authentic repair

Safety inspection after repairing

Explanation to the user

Is the condition of installation acceptable (unstability, height, tilt, falling preventive materials, etc.)? Are the power plug and the power cord free from damage or the attachment of dust? Is the product free from unusual sound, unusual odor, or unusually high temperature? Are the knobs, handles, and back cabinet free from abnormality (rattling, drop off, etc)?

Product

Is equipment free from any abnormality in daily use?

main body

Is the symptom examined according to the user’s statement? Is the product disassembled to the grade where troubleshooting is possible? Is the symptom reproduced, the faulty part located as a result of fault diagnosis, and replaced?

Trouble-

shooting

Is the normal condition confirmed after aging? Is the part, specified in the list of parts, used for the power unit? Is the part, specified in the list of parts, used for the insulation material (material, thickness, etc)? Is the part, specified in the list of parts, used for the power plug and the power cord? Is the part, specified in the list of parts, used for the internal cabling and the high voltage lead wires? Is the part, specified in the list of parts, used for the PDP module?

Specified parts

Are the rest of replaced parts those specified in the list of parts? Is the part version correct? Are the part mounting position, fixing method, and the distance the same as those of original? Is the wiring layout the same as the original (connector, clamper , distance from a heat generating part, etc)? Is the soldering condition acceptable (whisker, too much solder, tunnel, failure in winding, etc)?

Wires

mounted

Is the insulation material the same as the original (tubes, tapes, fiber, etc.)?

Are the repaired section and its peripheral parts free from abnormality? Is there any intrusion of foreign substances (solder chips, wire chips, screw chips, screws, etc.)? Is everything free from danger due to deterioration (discoloration, damage, leakage, etc.)? Is the safety protection circuit in normal operation? Are contamination and dust removed after final finish? Is there any failure in mounting and tightening (back cabinet, falling preventive materials, etc.)? Is there any influence by high temperatures (direct sunlight, stove, etc.), moisture (steam, etc.), oil fume,

dust, and dew condensation? Is the condition of ventilation acceptable (distance to the wall, ventilation holes, etc.)? Is the condition of the antenna acceptable (reach to the wire, bend, tilt, etc.)? Is the condition of power supply acceptable (regular outlet, adequate earthing, concentrated wiring, etc.)? Is the condition of installation acceptable (unstability, height, tilt, falling preventive materials, etc.)? Is the insulation check finished with a circuit tester or the like? (Refer to the above description, “Method of

insulation check.”) Are the contents and actual treatment of repairing and safety inspection services duly explained?

To use equipment after reading through the instruction manual. Not to dislodge the back cabinet. Not to insert anything in ventilation holes and clearances. To pull out the power plug if the product is not used for a long time. To ask an NEC’s authorized maintenance service company for the cleaning of the product interior

for the removal of dust. To turn off the power switch when cleaning the panel surface and the cabinet.

Explanation of use

To turn off the power switch of the main unit for the product provided with a remote control, in case of going out or sleeping.

Are explanations given to pull out the power plug in case of abnormality and to contact the dealer or an NEC’s authorized maintenance service company.

2-3

CAUTION

• Observe the caution matter, without fail

• The caution matters of

observed, without fail.

given in the instruction manuals, etc., must be

CAUTION

• Do not give shocks and vibration.

• The panel surface (display plane) of the filter and the PDP module is made of glass. If

any shocks or vibration is applied, it may be broken and the scattered glass chips will be a cause of injury.

• Do not put anything.

• Do not put anything on the product. Otherwise, this can be a cause of injury as a result

of falling down or dropping caused by imbalance.

• Transportation must be done by enough personnel.

• The product is heavy. In the case of transportation, unpacking, or packing, more than

two persons should do it (four persons for a product of 50-inch or larger) by supporting the top and the bottom of the product.

■Miscellaneous caution matters

(1) This product uses highly integrated semiconductor parts. Since these parts are fragile to

electrostatic charges, earth bands should be used for handling. The product should be handled where measures have been taken against electrostatic charges.

(2) For this product, the PDP modules and the PWBs are repaired by replacement in a unit.

Therefore, the units of the PDP modules and the PWBs must not be repaired or disassembled. Otherwise, the validity of warranty will be lost.

(3) If this product is used for the fixed character display or the like as in the case of a character

display board, a phenomenon of burning (not warranted) will occur. Burning is a phenomenon that the unevenness in the brightness is caused in the display. In such a case, the brightness in the section where the integrated display time is longer becomes lower than the brightness in another section where the integrated display time is shorter. This phenomenon is in proportion to the integrated display time and the brightness. For this reason, to relieve this difficulty during servicing, do not use any still picture, but use a display by motion pictures of a video or the like. In addition, use “FULL” for the screen mode and avoid using any display by “NORMAL”, “TRUE”, or MULTI SCREEN like side by side etc. If it is necessary to use only a still picture for unavoidable reasons, use a burning relief function such as “PLE LOCK”, “ORBITER”, “SCREEN WIPER”, etc.

(4) When a PDP module is operated after a long time of storage, it may encounter a difficulty like a

failure in displaying a screen or unstability according to the condition of storage. In such a case, the PDP module should be incorporated in the product and aging treatment should be carried out for about two hours (all screen display).

(5) Sulfides will deteriorate the PDP module and this is a cause of malfunction. Therefore, it is

absolutely prohibited to put any vulcanized rubber or a material containing sulfur in the vicinity of the PDP module.

(6) When taking out a PDP module from the maintenance package box, do it slowly so that the

panel surface does not get any shock or stress.

2-4

(7) If one touches the connector of the flexible cable exposed to the rear side of the PDP module,

there is danger of causing a poor contact. As such, it must be handled with utmost care. In addition, the flexible cable is very weak in mechanical strength. Therefore, this cable must not be touched during handling.

(8) The panel surface of the filter and the PDP module is easy to be hurt. These components

should be handled very carefully not to press or rub them with a hard thing. Never put them on a hard thing with the panel surface faced downwards.

(9) When the panel surface of the PDP module is contaminated, gently wipe off the contaminant

with a piece of soft dry cloth. Liquid-state contamination can be removed by lightly pressing it, without rubbing it. If it is difficult to remove the contamination, use a piece of cloth soaked with a neutral detergent. The cloth for wiping off should be clean. Never use the same cloth repeatedly. If a cleansing detergent or water drops should enter the module interior or be attached to the module surface other than the display plane at the time of cleaning, this will give rise to the destruction of the product when the product is energized.

(10) Refer to the “Instruction Manual” in regard to contamination in the filter and the cabinet.

(11) When transporting this product, use the packing materials specified in the list of parts. Once

used, such packing materials should not be used again.

(12) This product is composed of a variety of parts, such as those made of materials like glass,

metal, plastics, etc., and those like a lithium battery (circuit symbol of the MAIN PWB: BA9501), etc. Therefore, when abandoning this product, this should be done in accordance with the relevant law of the nation or an autonomous body.

CAUTION: Risk of Explosion if Battery is replaced by an Incorrect Type. Dispose of Used Batteries According to above the Instructions.

TROUBLESHOOTING CONTENTS

Power Supply does not switch ON

LED does not light. ................................................................................................................. page 3-2

LED blinking green (2 sec. intervals), temperature sensor alarn .............................................. page 3-3

LED blinking green (0.5 sec. intervals), fan error alarm ............................................................ page 3-4

LED blinking red, temperature error alarm ................................................................................ page3-5

LED alternate red/green blinking, PDP error alarm ................................................................. page 3-6

LED comes on gree then goes red, power voltage error alarm ................................................. page 3-7

Image Defects

Image burn .............................................................................................................................. page 3-8

Loss in brightness .................................................................................................................. page 3-8

Failure in writing...................................................................................................................... page 3-8

Pixel Defects .......................................................................................................................... page 3-9

Wron lighting ........................................................................................................................ page 3-10

Dark images1 ....................................................................................................................... page 3-10

Horizxontal lines ................................................................................................................... page 3-10

Block defects ........................................................................................................................ page 3-12

No picture ............................................................................................................................. page 3-14

Audio Problems ................................................................................................................................ page 3-15

Remote Problems

Wired Remote not effective ................................................................................................... page 3-16

Wireless Remote not effective ............................................................................................... page 3-17

Page 3-1

1. Power failure

3-2

(1) The power supply is not turned on.

Move the main power setting for OFF→ ON.

Is the POWER/STANDBY lamp lit?

(2) Blinking in green (Alarm of temperature sensor error or fan error) Go to (P3-3)

(3) Blinking in red after repeating reciprocal flash in red and green (POWER ON↔OFF) 3times (Alarm of temperature error) Go to (P3-5).

(4) Reciprocal flashing in red and green (Alarm of panel error) Go to (P3-6).

(5) Lighting in green, and then in red (Alarm of power line error) Go to (P3-7).

Is a 5Vdc output available in the state that the LD connector is disconnected and the main power is turned ON?

YES

Is a 5Vdc output available in the state that the RS connector is disconnected and the main power is turned ON?

YES

The PW connector, PWR PWB or the MAIN PWB is fault.

YES

The LD connector or the LED PWB is fault.

The RS connector or the 232C PWB is fault.

(Caution) If any abnormality is sensed in such a

Is the AC power output available at the AC connector (power cord)?

YES

Is a 6.8Vdc output available at Pin of  the PM connector?

YES

Is a 6.8Vdc output available at Pin of  the PW connector?

YES

Is a 6.8Vdc output available at Pin of  the PM connector?

YES

Is a 4.9Vdc output available at Pin of  the PM connector?

Is a 5Vdc output available at Pin of  the PW connector?

NO NO NO

The MAIN PWB is fault.

manner that the LED flashes or lights, all the power lines other than those of 7Vdc (M+7V) and 5Vdc (M+5V) are automatically turned off in about 10 seconds. When checking the power lines other than those of M+7V and M+5V, a circuit tester or the like should have been connected in advance.

The PW connector or the PWR PWB is fault.

The PM connector or the MAIN PWB is fault.

The power cord is defective.

Is a 6.8Vdc output available in the state that the LD connector is disconnected and the main power is turned ON?

The LD

YES

connector or the LED PWB

Is a 6.8Vdc output available in the state that the PW connector is disconnected and the main power is turned ON?

Is a 6.8Vdc output available in the state that the PM connector is disconnected and the main power is turned ON?

is fault.

The PW

YES

connector or the PWR PWB is fault.

YES

The PM connector or the MAIN PWB is fault.

YES

The power unit is fault.

YES

(2) Blinking in green

3-3

Alarm of te mperature sensor error

Blinking in green (intervals of 2 seconds)

Turn off the main power supply.

Pressing the [MENU] key of the product, turn on the main power supply to cancel alarming.

Press the remote control keys in the order of [MENU] [MUTE] [EXIT] [SLEEP] [EXIT] and enter the diagnostics menu. Press the [MENU/ENTER] key to display the FAN SET menu (P2/11).

Is there a display of numerals (almost room temperatures) at the right side of [T1, T2, T3]?

YES

The MAIN PWB is fault.

FAN SET

FAN MODE H CONT ENA – FAN OFF/L – CONT UP – FAN L/M – CONT TIME – FAN M/H – UP STEP 2 SF SAVE 075 DOWN STEP 2 PLE SAVE 070 READ TIME 60 T ALM 095 TEMP LEVEL 1 RET TME 030 PLE TIME 001 T1 030 T2 025 T3 030 T4 – MODE 2 IC ERROR – [MENU/ENTER] NEXT [EXIT] PREV 2/11

Is there a display of [-] for all the numerals at the right side of [T1, T2, T3]?

YES

Are there a 3.3Vdc output at Pin and a  clock signal (3.3Vpp) at Pins and of the  TS in the state that the TS connector is disconnected and the main power supply is turned on?

The TS connector

YES

or the SENC PWB is fault.

When a [-] display is presented, the PWB with the symbol shown below is fault. T1: SEND PWB, T2: SENB PWB, T3: SENC PWB

Are there a 3.3Vdc output at Pin and a clock signal (3.3Vpp) at Pins and of the  TR in the state that the TR connector is disconnected and the main power supply is turned on?

YES

The TR connector or the SEND PWB is fault.

Are there a 3.3Vdc output at Pin  and a

clock signal (3.3Vpp) at Pins  and  of the TM in the state that the TM connector is disconnected and the main power supply is turned on?

The TM connector or the SENB PWB is fault.

YES

The MAIN PWB is fault.

Alarm of fan error

3-4

Blinking in green (intervals of

0.5seconds)

Turn off the main power supply.

Pressing the [MENU] key of the product, turn on the main power supply to cancel alarming.

Is the fan running?

(Caution) When alarming is

canceled, [FAN MODE] of FAN SET (P2/11) in the diagnostics menu automatically moves from [ENA] to [H], thus causing the fan to run.

FAN SET

FAN MODE ENA CONT ENA – FAN OFF/L – CONT UP – FAN L/M – CONT TIME – FAN M/H – UP STEP 2 FAN SAVE 075 DOWN STEP 2 PLE SAVE 070 READ TIME 60 T ALM 095 TEMP LEVEL 1 RET TME 030 PLE TIME 001 T1 030 T2 025 T3 030 T4 – MODE 2 IC ERROR – [MENU/ENTER] NEXT [EXIT] PREV 2/11

FAN SET

FAN MODE H CONT ENA – FAN OFF/L – CONT UP – FAN L/M – CONT TIME – FAN M/H – UP STEP 2 FAN SAVE 075 DOWN STEP 2 PLE SAVE 070 READ TIME 60 T ALM 095 TEMP LEVEL 1 RET TME 030 PLE TIME 001 T1 030 T2 025 T3 030 T4 – MODE 2 IC ERROR – [MENU/ENTER] NEXT [EXIT] PREV 2/11

YES

Is there a 3.3Vdc output at Pin  of the FA and FB, connectors?

Is there a voltage output of 11.2Vdc at Pin 1 of the FA, FB, and FC connectors?

YES

The FAN-A/FAN-B is fault.

Is there a voltage output of

11.2Vdc when the FA connector is disconnected and the main power is turned ON?

YES

Is there a voltage output of

11.2Vdc when the FB connector is disconnected and the main power is turned ON?

YES

The FAN-A is fault.

The FAN-B is fault.

YES

The fan is out of order on the side where a 3.3Vdc output is generated.

The MAIN PWB is fault.

(Caution) In the FAN MODE, [ENA] is automatically recovered when the main power is turned OFF → ON.

(3) Blinking in red (Alarm of temperature error)

3-5

Since the internal temperature is too high in the product, the temperature protector has been actuated. In such a case, the following actions should be taken immediately:

1. Turn off the main power supply and pull out the power cord from the wall outlet.

2. Wait for about 60 minutes until the temperature in the main unit lowers.

3. Check whether the heat discharge port is covered with dust or the like. If yes, remove the clogging substance.

4. If the unit is used where the ambient temperature is high, it should be moved to an adequate place (air temperature ranging from 5°C to 35°C).

(4) Alternation blinking in red and green (Alarm of PDP error)

3-6

(Caution) How to reset the alarming condition

Blinking in red and green

Move the main power setting for OFF → ON.

Is there alternation blinking in red and green?

Turn OFF the main power supply.

With the [Menu] key of the product kept pressed, turn on the main power supply to assume the [Voltage Check Mode].

Pressing the [Input Select] key of the product, turn on the main power supply of the main unit. In this state, keep pressing the [Input Select] key for more than 2 seconds until alarming is canceled. Make confirmation by the method specified below.

Normal

YES

(Caution) When the main power supply is turned on with the

[Menu] key of the product kept pressed, it takes 30 seconds more to assume the state of [blinking in red and green]. In this time period, the following voltage checks should be carried out. If the state of [blinking in red and green] is assumed during this checking, take actions of [Alarm Canceling] and [Voltage Check Mode Setup] again.

Is there a 3.3Vdc output at Pin 94 of IC9501 in the MAIN PWB? (See the PWB Layout Diagram on P4-20.)

Turn ON the main power supply in the state that the AD, PD, and PH connectors are disconnected. In this state, are there the outputs of Vs (170Vdc), Vd (60Vdc), and 5Vdc at the PD/PH connectors as specified in the table at right? In this case, however, no images are generated.

YES

The PDP is fault.

YES

The MAIN PWB is fault.

The Power unit is fault.

(Caution) The voltage values of Vd and Vs and also the connector

pin numbers can differ according to the PDP. The method of checking these voltage values is obtainable from [2. Adjustment of the power unit] in the method of adjustment plus the table specified below.

Inch Vs Vd GND 5Vdc GND

50 PD-9pin PD-7pin PD-5pin PH-1pin PH-3pin

PD-9pin

PH-1pin

PD-7pin

PH-4pin

PD-5pin

PH-5pin

PD-4pin

PH-7pin

PD-5pin

PH-5pin

(5) Lighting in green, and then in red (Alarm of power voltage error)

3-7

Unlike [lighting in red] in the STANDBY mode, [lighting in green] continues for about 30 seconds without any

output of images and audio signals. Since then, the mode turns into [lighting in red].

Lighting in red

Make an OFF → ON setting twice for the main power supply in order to reset the alarming condition.

Is the LED lit in red after it has been lit in green for about 30 seconds?

YES

When the main power supply is turned on in the state that the AD, PD, and PH connectors are disconnected, are there the Vs (170Vdc) and Vd (60Vdc) outputs at Pins - to Pins - of the PD connector and  a 5Vdc output at Pins - of the PH  connector? In this case, is the LED not turned in red after it has been lit in green for about 30 seconds? At that time, however, no ima

ges are generated.

When the main power supply is turned on in the state that the PA and PV connectors are disconnected from one after another, is there a 12Vdc output at Pins - of the PA  connector or the 12Vdc and 6Vdc outputs at Pins and - of the PV connector? In  this case, is the LED not turned in red after it has been lit in green for about 30 seconds?

(Caution) How to reset the alarming condition The

alarming condition can be reset when an OFF→ ON setting is repeated twice for the main power supply in the state that the LED is lit in red. The interval between the first and second settings is not particularly specified.

Normal

YES

The PDP is fault.

(Caution) The voltage values of Vd and Vs

can differ according to the PDP. The method of checking these voltage values is obtainable from [2. Adjustment of the power unit] in the method of adjustment.

The MAIN PWB or the

AUDIO PWB is fault.

Is there an output of 3.3Vdc available at Pins

~ and 2.5Vdc at Pins ~ in the  

state that the PA and PV connectors are returned to the former state, the main power is turned ON, and the PN connector is disconnected? In this case, however, this check must be finished in 30 seconds. Otherwise, there will be power tripping on account of an alarm.

YES

The MAIN PWB is fault.

The Power unit or the PN connector is fault.

3-8

2. Image errors

(Caution) Typical abnormal images are shown below. All errors do not always fall on these error samples.

(1) Image burn and deterioration in brigh

Residual images are seen without signal entry.

(2) Failure in writing

(To the separate PDP service manual)

This is not a fault.

Deterioration in brightness

This is not a fault.

Failure in writing

The PDP is fault.

tness

No signal

All-whitesignal

Dot errors change

with no continuity.

All-whitesignal

(3) Pixel defect

3-9

Pixel defect

Are there many defective pixels exceeding the pixel defect standard?

This is not a problem.

YES

The PDP is fault.

[Pixel defect standard for reference]

Bright defect

(Fig. 1) All-Black Signal

Dark defect

(Fig. 2) All-White Signal

(4) Wrong lighting

3-10

Wrong lighting

The PDP is fault.

(To the separate PDP service manual)

All-black signal

Dot errors change

with no continuity.

All-black signal

(5) Dark images [Other than the deterioration in brightness as per (1) above]

The images are dark even

with an all-white input

The PDP is fault.

(To the separate PDP service manual)

(6) Defect in horizontal lines

Line defect

The PDP is fault.

(To the separate PDP service manual)

All-white signal

3-11

Defect in the block unit

All-white signal

The PDP is fault.

All-white signal

(7) Defect in vertical lines

3-12

Defect in vertical lines

The PDP is fault.

All-white signal

Block defect

The PDP is fault.

All-white signal

3-13

All-white signal

(8) No pictures [(Caution) The voltage outputs of Vs = 170V and Vd = 64V, 5Vdc are always generated, but the

3-14

LED is not flashing or lighting for alarming. However, the voltage values can differ according to the PDP.]

No picture is displayed.

Make the setting of OFF→ ON for the main power supply.

Does the priming glimpse?

YES

When the AD connector is disconnected, is the LVDS signal normally output to each pin of the AD connector? (For more details of the signal, refer to the descriptions about the connector pins.)

YES

The PDP is fault.

The MAIN PWB is fault.

The AD connector or the PDP is fault.

+ 51 hidden pages