Sanyo 42E30FA, 32E30A Schematic

FILE NO

SERVICE MANUAL

LCD TV

LCD-32E30A

PRODUCT CODE No.: 168234766 CHASSIS NO. : SSA32UT-00

LCD-42E30FA

PRODUCT CODE No.: 168234827 CHASSIS NO. : SSA42UT-00

REFERENCE No.:

SM0945003-02

CONTENTS

1. Safety precautions .................................................................................................

2. Alignment instructions and method of software upgrading.....................................

3. Working principle analysis of the unit ...................................................................

4. Block diagram ......................................................................................................

5. IC block diagram..................................................................................................

6. Wiring diagram ...................................................................................................

7. Troubleshooting guide..........................................................................................

8. Schematic diagram ..............................................................................................33

APPENDIX-A: Assembly list

APPENDIX-B: Exploded View Removing or Installing the Stand Wall mounting instructions

Attention:

please read the following points carefully.

This service manual is only for service personnel to take reference with. Before

servicing

1.Safety precautions

1. Instructions

Be sure to switch off the power supply before replacing or welding any components or inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!):

a) Do not touch here and there by hand at will; b) Be sure to use anti static electric iron; c) It’s a must for the welder to wear anti static gloves. Please refer to the detailed list before replacing components that have special safety requirements. Do not change the specs and type at will.

2. Points for attention in servicing of LCD

2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to

Use the screen of the original model for replacement.

2.2 The operation voltage of LCD screen is protecting yourself and the machine when testing the system in the course of normal operation or right after the power is switched off. Please do not touch the circuit or the metal part of the module

That is in operation mode. Relevant operation is possible only one minute after the power is switched off.

2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or damage to the set.

2.4 Never operate the set or do any installation work in bad environment such as wet bathroom,

laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc. Otherwise bad effect will result.

2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into the

module, be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit.

2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off at

once. Likewise, if the screen is not working after the power is on or in the course of operation, the power must be cut off immediately and no more operation is allowed under the same condition.

2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the

power is off because in this case relatively high voltage still remains in the capacitor of the driving circuit. Please wait at least one minute before the pulling out or plugging in the connection wire.

2.8 When operating or installing LCD please don’t subject the LCD components to bending, twisting or

extrusion, collision lest mishap should result.

high voltage

. Be sure to take proper measures in

2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it’s necessary to

pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and ensure full grounding for all the parts that have to be grounded.

2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or

moving the set please take care not to touch or scratch them. Once they are damaged the screen would be unable to work and no way to get it repaired.

If the connection wires, connections or components fixed by the thermo tropic glue need to disengage when service, please soak the thermo tropic glue into the alcohol and then pull them out in case of damage.

2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to

breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.

2.12 For the storage make sure to put it in a place where the environment can be controlled so as to

prevent the temperature and humidity from exceeding the limits as specified in the manual. For prolonged storage, it is necessary to house it in an anti-moisture bag and put them altogether in one place. The ambient conditions are tabulated as follows:

Temperature Scope for operation

Scope for storage

Humidity Scope for operation 0% ~

Scope for storage 0% ~ 90%

2.13 Display of a fixed picture for a long time may result in appearance of picture residue on the

screen, as commonly called “ghost shadow”. The extent of the residual picture varies with the maker of LCD screen. This phenomenon doesn’t represent failure. This “ghost shadow” may remain in the picture for a period of time (several minutes). But when operating it please avoid displaying still picture in high brightness for a long time.

~+ 35oC

+ 40oC

3. Points for attention during installation

3.1 The front panel of LCD screen is of glass. When installing it please make sure to put it in place.

3.2 For service or installation it’s necessary to use specified screw lest it should damage the screen.

3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between the

screen and the glass will affect the receiving and viewing effect

3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and

insulation please take care to keep it in intactness so as to avoid hidden trouble.

3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.

2.Alignment instructions

1. Test equipment

VG-848 (YPbPr, VGA signal generator) VG-849 (HDMI signal generator) FLUKE 54200(TV signal generator) CA210

2. Power test

Connect main board, power board and IR board according the wiring diagram, connect the power and press power key (Remote controller or Keypad) button to turn on the TV.

a) Test the pin voltage of P802/power board , the data is shown in table1:

P802 Pin1,2 Pin3,4 Pin5,6,7 Pin8,9 Pin10,11,12 Pin13 Pin14 Pin15 Pin16

Voltage GND 22.8-25.2V GND 11.4-12.6V 4.75-5.25V

b) Test the pin voltage of P803/power board, the data is shown in table2:

P803 Pin1,2,3,4,5 Pin6,7,8,9,10 Pin11 Pin12 Pin13 Pin14

Voltage 22.8-25.2V GND NC 2.5V-5V 2.5-5V PWM NC

(white balancer)

Table1 voltage data of P802

For 32” & 42”

On:2V-5.5V

Off: 0-0.5V

Table2 voltage data of P803

For 32” & 42”

<0.6V 2-5V 2.5-5V PWM

3. Alignment flow-chart

The alignment flow-chart is shown as fig-1

Check if DDC, HDCP KEY, FLASH are written

Combined test for general assembly

White balance adjustment

Connect to the center signal source and check each Function of TV (station leaking, analog control, etc.)

Check the output of earphone and speaker.

Input AV/SVIDEO signal and check the function

Input HD signal and check the function of YPbPr

Input VGA signal and check if the display is normal, check

the function (analog control), horizontal/vertical center, etc.

Input HDMI signal and check if the display is normal, check

the function (analog control), horizontal/vertical center, etc.

Preset ex-factory

Check the accessories and packing

Fig-1 adjustment flow-chart

4. Adjustment instruction

At any input source then press the “LEFT” key, “BACK” key and “OK” key orderly by the remote control to enter factory mode.

During Factory menu, if “MENU” (First layer) or “BACK” key is pushed, system will exit factory mode.

4-1. Source Calibration

4-1.1. Set the signal generator to input sources Video3 on LCD-TV; ASTRO-859 signal setting to1080i

(PG1 mode Timing 972 and Pattern 969 Color Bar.)

4-1.2. Entering into factory Mode: Press up or down key of remote control to select “Source Calibration”, Press

䇸RIGHT䇹 key to enter the item.

-> Source calibration performed automatically when finished that will show OK.

Repeat step 2 to do VGA input sources, ASTRO-859 signal setting to1024X768 60Hz. (PG1 mode: Timing 856 and Pattern 921 Gray.)

Repeat step 2 to do TV input sources of Video1 (Composite-AV): ASTRO-859 signal is set to Timing 969 PAL system and Pattern 969 color bar.

4-2. Color Temperature Adjustment & Check

4-2.1. Set the signal generator to RGB, 1024*768, 60HZ (ASTRO-859: PG1 856), Level: 0.56V (80%).

Full white pattern.

4-2.2. Press up or down key of remote control to select “Cool”, Press 䇸OK䇹 key to enter the item.

R, G, B drive values are set for COOL, Medium(Normal), and WARM independently.

4-2.3. Select 䇸Cool䇹

Cool spec. x= 0.267±0.010 y= 0.271±0.010

If the x and y value are larger than specification,

Decrease Green drive from default value. Increase Blue drive from default value.

If the x or y or both x and y value is/are smaller than specification.

Decrease Blue drive from default value

According to a x and y value, please following adjustment of 1 or 2.

1 If x value is higher than spec

Increase Green drive from default value. Increase Blue drive from default value.

2 If y value is higher than spec,

Decrease Green drive from default value

4-2.4. Select [Medium---Normal]

Normal spec. x=0.281±0.010 y=0.288±0.010

Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.

4-2.5. Select [Warm]

WARM spec. x=0.301±0.010 y=0.310±0.010

Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.

4-2.6 Exit Factory Mode:

After finish adjusting color temperature, press [BACK] to exit factory mode.

5. Items of Factory menu

Vendor may customize design and add adjustment items Factory menu as far as all required items are included.

Press up and down key can move high light item from Color Temperature – WARM -> Color Temperature – Medium -> Color Temperature – Cool -> Timer Clear -> Preset Channel -> NVRAM Clear -> Full Power -> Source Calibration -> Reset to Default -> RF Burn In -> RF F/W Upgrade -> MCU Burn In -> USB F/W Upgrade.

The NVRAM Clear and Reset to Default items will have a check dialog “yes or no” to do or not.

Push “OK” key can select high light item function. (Press right key can adjust value)

Display model name, firmware version and released date on bottom

5-1) Cool

Press up or down key can select high light item function.

Press OK key to enter the item.

Following data for color temp shall be edited manually.

-R, G, B data for each preset.

-Press “Up” or “Down” key to select “R”, “G”, “B” item

-Press “Left” or “Right” key to set the “R”, “G”, “B” value.

- Press “MENU” or “BACK” item to exit to factory mode

5-2) Warm

Press up or down key can select high light item function.

Press OK key to enter the item.

Following data for color temp shall be edited manually.

-R, G, B data for each preset.

-Press “Up” or “Down” key to select “R”, “G”, “B” item

-Press “Left” or “Right” key to set the “R”, “G”, “B” value.

- Press “MENU” or “BACK” item to exit to factory mode

5-3) Normal (Normal)

Press up or down key can select high light item function.

Press OK key to enter the item.

Following data for color temp shall be edited manually.

-R, G, B data for each preset.

-Press “Up” or “Down” key to select “R”, “G”, “B” item

-Press “Left” or “Right” key to set the “R”, “G”, “B” value.

-Press “MENU” or “BACK” item to exit to factory mode

5-4) Timer Clear

Press up or down key can select high light item function. Press Right key to enter the item.

Reset the timer which records hours of LCD panel burn in.

5-5) Preset Channel

Press up or down key can select high light item function. Press Right key to enter the item.

The system will be loaded preset channel for production line.

- ATV(Analog TV), DTV(Digital TV)

5-6) NVRAM Clear

Initialize program’s default values to NVRAM for following adjustment items accuracy.

In factory mode it is the first and important step to make sure all values are default value and correct.

- Reset settings: Gamma table, Channel table (Favorite channel, Channel label etc.), Model table (H/V Position, Clock, Phase), Source dependent setting (Contrast, Brightness etc.), Common setting (Volume, Language etc.), Parental Control (Rating, Password etc).

To avoid a mistake initial process after factory setting is done. This item will have a check dialog “yes or no” to do the initial or not.

NOTICE:

After this item is processed then needs to be DC powered on/off.

5-7) Full power

This is for power consumption testing.

To measure the maximum power consumption of TV set, we adjust the value of following items to maximum.

- Contrast

- Brightness

- Audio output

5-8) Source Calibration

Auto Calibration (gain/offset) must be adjusted color by firmware automatic adjustment in PC, Video1 (Composite) and Video3 input source.

5-9) Reset to Default

Reset all settings of OSD menu to default value and will go to standby mode.

- Reset settings: Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting

(Contrast, Brightness etc.), Common setting (Volume, Language etc.)

5-10) RF Burn In

RF (ANT) no signal input, use “snow” pattern for burn in.

5-11) RF F/W Upgrade

Press Right key to enter the item. To avoid a mistake F/W Upgrade process after factory setting is done. This item will have a check dialog “yes or no” to do the upgrade or not.

5-12) MCU Burn In

Press Right key to enter the item. To avoid a mistake MCU Upgrade process after factory setting is done. This item will have a check dialog “yes or no” to do the upgrade or not.

5-13) USB F/W Upgrade

Press Right key to enter the item. The function can be switched On/Off the update of the boot code And the F/W can be updated on USB by pressing Right key.

6. Dealer Mode Function

7. Performance check

7-1 TV function Connect RF to the center signal source, enter Channel menu ĺ auto tuning, check if there are channels be skipped, check if the picture and speaker are normal.

7-2 AV/S-Video terminals Input AV/S-Video signal, check if the picture and sound are normal.

7-3 YPbPr/YCbCr terminal Input YUV signal (VG848 signal generator), separately input the YUV signals listed in table4 and check if the display and sound are normal at any situation (power on, channel switch and format convert, etc.)

Table4 YUV signal format

7-4

VGA terminal Input VGA signal (VG848 signal generator), separately input the signals listed in table5 and check the display and sound. If the image is deflection of the Horizontal and vertical, select Menu->Setup->Auto Adjust to perform autocorrect.

Table5 VGA signal format

7-5 HDMI terminal Input HDMI signal (VG849 signal generator), separately input the signals listed in table4 and table5 and check the display and sound (32 KHz, 44.1 KHz, 48 KHz) at any situation (power on, channel switch and format convert, etc.)

7-6 other functions check a) Check the turn on/turn off timer, sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext, etc.

8. Software instruction

(1)

USB-RS232 Tool and RS-232 male to female cable

Follow below connecter function with PC and LCD TV.

(2) To connect the RS-232 cable male terminal to TV set RS-232 service port.

(3)

To select “Setup” function to set the environment.

(4)

Setting the Baud Rate to “115200” and select the update firmware file and press “OK” button.

To select “down” pattern that will show the “waiting for ping” message, then you can turn on the

(5)

power by pressing “DC Power on” button.

(6)

When you find below message, please waiting for the F/W updating.

(7)

When the update is finished that will show the “Close” pattern, please press the button to close the tool of the RS232.

9. SSU F/W Upgrade method (DTV Only)

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