Sanyo PDP-42XS1 Schematic

FILE NO.

SERVICE MANUAL

PDP TV

PDP-42XS1

SPECIFICATIONS

Power source: 100-240V, 60/50Hz Power consumption: 400W Dimension: 1,246(W) x 731(H) x 305(D)mm Net Weight: Approx. 41.0kg

Specifications subject to change without notice

REFERENCE No.

SM0915001

CONTENTS

Safety Precautions………………………………………………………………………..… Alignment instructions. ………………………………….…………………………….… Method of software upgrading …………………………………………….…………………… Working principle analysis of the unit……………………..……………………….………… Diagnose and service of panel……………………………………………………………..…… Wiring diagram……………………………………………………………………………..… Assembly list………..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…..…. Trouble shooting guide ………………………………………………………..……………... Schematic diagram …………………………………………………………………….…..

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Note: This maintenance manual is intended only for the reference of the maintenance people. Please pay attention to the following points before carrying out the maintenance work.

Safety Precautions

Please read the “Points for attention for the Maintenance & Repair of PDP” and “Criterion for Identifying

the Defects on Screen” as below, before inspecting and adjusting the TV set.

1. “Points for att ent ion for the Maintenance & Repair of PDP”

To avoid possible danger, damage or jeopardy to health and to prevent PDP screen from new damage,

the maintenance people must read the following carefully. If they ignore the following warnings, there will

be deathful risks:

1.1 Screens vary from one model to another and therefore not interchangeable. Be sure to use the same

type of screen in the replacement.

1.2 The operation voltage is approximately 350V for PDP module (including screen, driving circuit, logic

circuit and power module). If you want to conduct maintenance work on PDP module when the set is in

normal operation or just after the power is off, you must take proper measures to avoid electric shock

and never have direct contact or touch with the circuitry of the working module or metal parts. That’s

because within a short time relatively high voltage still remains on the capacitor of the driving part even

after the power is off. Make sure to begin relevant maintenance operation at least one minute after the

power is off.

1.3 Don’t apply on the module any power supply that is higher than the specification. If the power supply

used deviates from the value given in the specification, there might be a possibility of leading to fire or

damage to the module.

1.4 Never have operation or mounting work under unsuitable environment such as areas in the vicinity of

water – bathroom, laundry, water chute of kitchen – sources of fire, heat-radiation parts or direct

exposure to sunlight. Otherwise there will be kickbacks.

1.5 In case foreign substances such as water, liquid, metal slices or others fall into the module carelessly

power must be cut off immediately. Keep the module as it is and do not move anything on the module.

Otherwise it might be possible to contact the high voltage or cause shock short circuit so that it may lead

to fire or electric shock.

1.6 If there is smoke, abnormal smell or sound from the module, please cut the power off immediately.

Likewise in case the screen doesn’t work when the power is on or during the operation, please also cut

off the power at once. No more operation in this case.

1.7 Do not remove or plug its connection wire when the module is in operation or right after the power is

off. That’s because there remains a relatively high voltage on the capacitor of the driving circuit. If there

is a need to remove or plug in the connection wire, please wait at least one minute after the power is off.

1.8 Considering the module has a glass faceplate, please avoid extrusion by external force lest it should

cause glass breakage that may get people injured. Two people are needed in cooperation to move this

module lest contingency takes place.

1.9 The complete TV set is designed on the basis of full consideration of thermal dissipation by

convection, with the round hole on the top for heat emission. To avoid overheat, please do not have any

covering on the hole during normal operation and never put it in the place where the space is narrow and

in bad ventilation.

1.10 There is quite a number of circuits in PDP that are integrated ones. Please be on guard against

static electricity. During maintenance operation be sure to cover yourself with anti-static bag and before

operation make sure to have it sufficiently grounded.

1.11 There are a big number of connection wires distributed around the screen. Please take care not to

touch or scuff them during maintenance or removing the screen, because once they are damaged the

screen will fail to work and it’s not possible to repair it.

1.12 Connector for the circuit board of the screen part is relatively fine and delicate. Please take care in

the replacement operation lest it should get damaged.

1.13 Special care must be taken during transportation and handling because strenuous vibration could

lead to screen glass breakage or damage on the driving circuitry. Be sure to use a strong outer case to

pack it up before transportation or handling.

1.14 Please put it for storage in an environment in which the conditions are under control so as to

prevent the temperature and humidity from exceeding the scope stipulated in the specification. For

prolonged storage please cover it with anti-moisture bag and have them piled and stored in one place.

The environmental conditions are tabulated as below:

Temperature Scope for operation 0~50centigrade

Scope for storage -15~60centigrade

Humidity Scope for operation 20%~80%

Scope for storage 20%~80%

1.15 If a fixed picture is displayed for a long time, difference in its brightness and color may occur

compared with movable pictures. But it doesn’t show any problem and the reason is that there is

reduced density of fluorescent powder in the former. On the other hand, even if changes take place in

the picture, it can keep its brightness for a period of time (several minutes). It’s a feature inherent with

plasma and it’s not abnormal. However please try as much as possible to avoid showing a still picture of

high brightness for a long time during operation.

1.16 As a digitalized display devise, this module is provided with error diffusion technology and the gray

scale and false enhancement of contour can be displayed by reusing of sub-field. As compared with

cathode ray tube, it can be found in the moving picture that at the brim of the face of a person there are

some wrong colors.

1.17 During the display of graph (indicating the gradual change in brightness horizontally or vertically)

resulting from gray scale test it can be found that the brightness for the two adjacent levels is uneven.

This is caused by the reuse of sub-field, the display of load rectification and the electrolysis.

1.18 The screen front plate is of glass. Please make sure that the screen has been put in place during

erection. If it is not in place before the erection begins it may lead to screen crack or breakage.

1.19 Make sure the screw used in the mounting of the screen is of the original specs lest it should cause

damage to the screen due to mismatch. Special care should be taken not to use too long or too big

screw.

1.20 Care must be taken to guard against dust during assembling or dismantling, especially to avoid dirt

from falling in between the screen and the glass lest it should harm the receiving and viewing effect.

1.21 There is piece of insulator stuck on the rear chassis corresponding to the power supply board. It is

used to isolate the cool part from the hot part. Please take care to keep it intact lest it should become a

potential safety trouble.

1.22 In addition to plasma screen, the glass is a part of high value. It has such functions as anti-radiation,

adjustment of color temperature etc. Please handle it carefully.

Alignment instructions

1 Alignment equipment

PM5518 (video signal generator)

54200 (SCART video signal generator)

VG-849 (VGA signal generator)

CA100 (white balancer)

VG-849 (HDMI signal generator)

2 Alignment flow-chart

The alignment flow-chart is shown as fig-1

Connect with central signal source, then check each function of TV such as analog control etc., check the output of headphone and speaker

Input AV/S, HDMI and HD signal, then check each function of all the terminals

Input VGA signal (one format), check if the displ ay is normal un der PC condition, check each function such as analog cont rol etc., ch eck hori zont al /vertical center etc.

3 Unit adjustments

3.1 Connect jump wire (SW501) to the power +24V for the unit panel.

3.2 After connect the digital board, button board and HF board, check if the display is normal.

3.3 Enter factory menu The first press the MENU button, then press the “-/--“

Press the SLEEP button to selection the adjustment page menu, press CH+ and CH- buttons to

selection item, press VOL+ and VOL- buttons to set item, press the MENU button exit the factory menu

again. If the unit does not turn off, you press the SLEEP can enter factory menu.

Check DDC(N604/N702) and FLASH(N502)

To produce digital board and HF board

Check the digital board and HF board

All testing

Preset ex-factory

Check the accessories and pack t hem in box

Fig-1 adjustment flow-chart

→ “9” → “1”→ “8” buttons enter factory menu.

3.4 EEPROM initialization

Enter page one of the factory menu, select the EEPROM INITIALIZE to ON.

3.5 White balance adjustment

The eight

level gray-scale signal of FLUKE PW5148 video generator sends to AV channel, enter the factory menu white balance adjustment page. Select the standard color temperature item, fixed the R GAIN to be 32H, adjust the seventh color coordinate (284, 299) of B, G GIAN; fixed the R OFFSET to be 32H, adjust the second color coordinate (284,299) of B, G OFFSET. Note: adjust white balance of standard color temperature of the AV channel, other four channel due to the software auto adjustment, under the 1200k(270,283), 6500K(313,329) due to the software pre-set.

Cool and warm color temperature pre-set of t he AV channel as f ol l ows table:

AV channel Cool (1200K) Warm (6500K) R Offset 32H 32H

G Offset 2BH 2BH B Offset 35H 32H R Gain 32H 32H G Gain 4AH 39H B Gain 3FH 22H

4 Performance check

4.1 TV function Enter the search menu → auto search, connect RF-TV terminal to the central signal source, check if there is station skipping.

4.2 AV/S input terminal Input AV/S signal, check the picture and sound is normal

4.3 SCART terminal (note: check the SCART terminal, set display mode to AUTO)

4.3.1 Check SCART INPUT special function

4.3.1.1 SCART1 terminal function a. After turn on the unit, connect the SCART1 to PM54200 signal generator, then the unit auto select to SCART1 mode. b. SCART signal generator sends CVBS signal to the unit; check if the image and sound is normal. It sends image format (16:9 and 4:3) to the unit, check if the unit auto identify is normal. Change SCART signal to RGB signal; check if the image and sound is normal, It sends image format (16:9 and 4:3) to the unit, check the unit auto identify is normal. Select the PIP mode, connect earphone cable, and check if the sound is normal.

4.3.1.2 SCART2 terminal function a. After turn on the unit, connect the SCART2 to PM54200 signal generator, then the unit auto select to SCART2 AV mode. b. SCART signal generator sends CVBS signal to the unit, check if the image and sound is normal. It sends image format (16:9 and 4:3) to the unit, check if the unit auto identify is normal, and display the SCART2 AV. Change SCART signal to Y/C signal, select the SCART2 Y/C channel mode, check if the image and sound is normal, It sends image format (16:9 and 4:3) to the unit, check if the unit auto identify is normal. Select the PIP mode, connect earphone cable, and check if the sound is

normal.

4.3.2 Check SCART OUTPUT special function

4.3.2.1 SCART1 terminal function Input signal in the TV states, connect the SCART1 terminal to the TV. Change the TV program, check if output signal of SCART1 is TV signal, and the image and sound is normal, change the unit channel, the CART1 output TV signal, it can not other signal.

4.3.2.2 SCART2 terminal function Input signal in the TV/AV/S states, connect the SCART2 terminal to the TV. Change the unit channel, check if output signal of SCART2 is current signal, and the image and sound is normal.

4.4 YPbPr terminal Input the YUV signal (VG-848 signal generator), separate input YUV format signal of table 1, check if the image and sound is normal. If the image is deflection of the H-field, select auto sync correction of the SCREEN menu. If the image is slight disturb, adjust the FINE TUNE correction of the SCREEN menu. Open the PIP mode, connect the earphone, and check if the image and sound is normal.

Table 1 YUV format signal Mode TIMING parameter VG848 NO. 480I 712X484@ 60HZ 968

480P 720X484@60HZ 978 576I 702X574@50HZ 969 576P 756X557@50HZ 979 720P @50HZ 1280X720@50HZ 5SET 720P @60HZ 1280X720@60HZ 976 1080I@50HZ 1920X1280@50HZ 1SET

1080I@60HZ 1920X1280@60HZ 972

4.5 VGA terminal Input the VGA signal (VG-848 signal generator), separate input VGA format signal of table 1, check if the image and sound is normal. If the image is deflection of the H-field, select auto sync correction of the SCREEN menu. If the image is slight disturb, adjust the FINE TUNE correction of the SCREEN menu. Open the PIP mode, connect the earphone, and check if the image and sound is normal.

4.6 HDMI terminal HDMI signal format receive the three high definition signal: 480P, 576P, 720P/50/60 Hz, 1080I/50/60 Hz, except for the table 2 signal. Check if the image (contain HDCP ON and OFF) and sound is normal. If the image is deflection of the H-field, select auto sync correction of the SCREEN menu. Open the PIP mode, connect the earphone, and check if the image and sound is normal.

TABLE2 VGA signal format

TIMING parameter VG848 NO.

640X480@60HZ 885

640X480@72HZ 851

640X480@75HZ 852

640X480@85HZ 334(K7253)

720X400@70HZ 855

720X400@85HZ 960

800X600@56HZ 853

800X600@60HZ 854

800X600@72HZ 887

800X600@75HZ 945

1024X768@60HZ 856

1024X768@70HZ 857

1024X768@75HZ 858

1280X1024@60HZ 963

4.7 Ex-factory setting see to TABLE 3 - TABLE 7 TABLE 3 Factory Option Menu

ITEMS EX-FACTORY SETTING

IIC Bus-off Off EEPROM Erase Off Backlight Adjustable Off

Back Light 100 Menu Timeout 10 Blank switch enable Off

ShowLogo On

Auto Channel Lable On

TT Char Group

West Europe / East Europe / Cyrillic / Turkish /Greek/Arabic/Hebrew

Dynamic Scart Off

Note: the latter 6 items should set according to clients’ require.

TABLE 4 Factory Audio Setting

ITEMS EX-FACTORY SETTING Volume 1 45H Volume 25 62H

Volume 50 67H Volume 75 6EH Volume 100 76H

HP VOLUMESETTING

ITEMS EX-FACTORY SETTING Volume 1 64H

Volume 25 96H Volume 50 A1H Volume 75 AEH Volume 100 BEH MSP Scart1 Volume 72H

ITEMS EX-FACTORY SETTING

Prescale Scart 4CH

Prescale FM/AM 30H Prescale Nicam 64H

Scart TV Volume 20H Scart AV Volume 72H D/K select HDEV3 Off AVC Off Equalizer Bands Max 60H

Spatial Mode 0 Spatial Strength 00H

TABLE 5 Factory Video limit Setting

ITEMS CVBS SC-RGB YPBPR D-SUB HDMI Bright Min D5H DFH C6H D5H D8H Bright Middle 00H 02H 01H 07H 09H

Bright Max 15H 20H 18H 2BH 18H

Contrast Min 09H 0CH 16H 10H 0CH Contrast Middle

20H 20H 26H 32H

1FH

Contrast Max 2AH 2DH 3EH 3FH 29H

Sharpness Min Sharpness Middle Sharpness Max

00H 00H 00H 00H

10H 10H 10H 10H

1FH 1FH 1FH 1FH

00H

10H

1FH

Color Min 00H 00H 00H 00H 00H Color Middle 3FH 3FH 3FH 3FH 32H

Color Max 50H 7FH 7FH 7FH 63H

Hue Min CEH CEH CEH CEH CEH Hue Middle 00H 00H 00H 00H 00H Hue Max 32H 32H 32H 32H 32H

TABLE 6 THE IMAGE ANALOG SETTING

Vivid Standard Mild Custom Contrast 80 75 50 75 Brightness 60 50 50 50 Color 60 50 40 50 Hue 00 00 00 00

Sharpness 50 50 50 50

Note: in factory menu states, it can change the factory mode to value of the image and

sound, else select the image and sound balanced value in the other states.

TABLE 7 SOUND equilibrium value setting

Live Pop Rock Custom

120Hz 50 50 65 50 500Hz 50 50 55 50

1.5KHz 50 60 55 50 5KHz 80 70 55 50

10KHz 85 70 55 50

4.8 Ex-factory setting of user menu

4.8.1 select TV channel

4.8.2 video menu, Mode: Standard, NR: Medium, APL:ON

4.8.3 sound menu, Volume: 20, Balance: 00, Equalizer: Custom, HP Volume: 20;

4.8.4 edit menu, Color System: Auto, Sound System: DK;

4.8.5 option menu, Default Zoom: Auto, Child Lock: Off, Menu Language: English, Country: UK, WSS: OFF, Blue Screen: On. Note: the 4.8.4 and 4.8.5 items should set according to clients require.

Method of software upgr adi ng

1. Enter the software upgrading state of the TV Method 1: press the VOL- button in the unit, turn on the main power switch, then the screen

display black screen, but the indicator to blue.

Method 2: Enter factory menu, select the IIC-BUS OFF item.

2. Connection upgrading tools with upgrading port.

3. Dual- click IAPWriter logo, enter the upgrading states (if the PC and the IIC communication

trouble, it can prompt.

4. Select the file menu load the software follow as:

5. Select WRITE DEVICE item of the device menu, till the right screen display “DONE”.

6. turn off the power , restart the unit. Note: because of the software, it may be no-stabilization, the software can auto download and write.

Upgrading tools

Connection cable

Upgrading port

NOTE: Do not shut the power off or turn the TV set on during the FLASH write. Otherwise it may lead to no way for flash to rewrite.

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