Sanyo LCD- 19E30 Schematic

FILE NO

SERVICE MANUAL

LCD TV

LCD-19E30

PRODUCT CODE No.: 1 682 347 60

CHASSIS NO. : SSA19CT-00

LCD-

26E30

PRODUCT CODE No.: 1 682 347 61

CHASSIS NO. : SSA26CT-00

LCD-32E30

PRODUCT CODE No.: 1 682 347 62

CHASSIS NO. : SSA32CT-00

LCD-

42E30

PRODUCT CODE No.: 1 682 347 63

CHASSIS NO. : SSA42CG-10

LCD-

42E30F

PRODUCT CODE No.: 1 682 347 64

CHASSIS NO. : SSA42CG-00

REFERENCE No.:SM0945001-01

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 ..............................................................................................

APPENDIX-A: Assembly list

APPENDIX-B: Exploded View

Removing or Installing the Stand

Wall mounting instructions

Attention:

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

servicing

please read the following points carefully.

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

high voltage

. Be sure to take proper measures in

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.

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

~+ 35

Scope for storage

+ 40

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.

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.

Alignment instructions

1. Test equipment

VG-848 (YPbPr,VGA signal generator)

VG-849 (HDMI signal generator)

FLUKE 54200(TV signal generator)

CA210

(white balancer)

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:

Table1 voltage data of P802

For42”/32”/26”

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

On:2V-5.5V

Off: 0-0.5V

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

For 19”

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

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

On:2V-5.5V

Off: 0-0.5V

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

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

Table2 voltage data of P803

For42”/32”/26 only

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

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 “Mute” (remote control) and “Menu (key pad) to enter factory mode.

During Factory menu, if “MENU” or “EXIT” key is pushed, system will exit factory mode.

4-1. Source Calibration

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

(PG2 mode Timing 933 and Pattern 924 100% Color Bar.)

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

䇸OK䇹 key to enter the item.

Board Name: L19112_Rev.1

VERSION: SSA19C-WXGA V1.0

04/10/09 00:00:00

FACTORY MENU

Cool

Warm

Normal

Shipping

NV Clear

Full Power

uto Calibration

RF Burn In

Service Mode

Reset

< Factory >

< Off >

Board Name: L19112_Rev.1

VERSION: SSA19C-WXGA V1.0

04/10/09 00:00:00

FACTORY MENU

Cool

Warm

Normal

Shipping

NV Clear

Full Power

uto Calibration

RF Burn In

Service Mode

Reset

< Factory >

< Off >

-> 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 914:5 White Block.)

Repeat step 2 to do TV input sources of Video1 (Composite-AV):

Fluke 54200 TV SIGNAL GENERATOR: Signal setting to PAL System and Pattern: CHECKER.

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, and WARM independently.

4-2.3. Select 䇸Cool䇹

Cool spec.:26”/32”/42”

x= 0.267±0.010

y= 0.271±0.010

Cool spec.:19”

x=0.281±0.010

y=0.288±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 [Normal]

Normal spec.: 26”/32”/42”

x=0.281±0.010

y=0.288±0.010

Normal spec.: 19”

x=0.300±0.010

y=0.310±0.010

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

4-2.5. Select [Warm]

WARM spec.: 26”/32”/42”

x=0.301±0.010

y=0.310±0.010

WARM spec.: 19”

x=0.314±0.010

y=0.323±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 [MENU] 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 Cool ->Warm -> Normal ->Shipping-> NV clear-> Full

Power -> Auto Calibration -> RF Burn In -> Reset.

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

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

Display model name, firmware version and released date on bottom

Board Name: L19112_Rev.1

VERSION: SSA19C-WXGA V1.0

04/10/09 00:00:00

FACTORY MENU

Cool

Warm

Normal

Shipping

NV Clear

Full Power

uto Calibration

RF Burn In

Service Mode

Reset

< Factory >

< Off >

5-1) Cool

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

Press enter 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 “EXIT” item to exit to factory mode

5-2) Warm

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

Press enter 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 “EXIT” item to exit to factory mode

5-3) Normal

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

Press enter 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 “EXIT” item to exit to factory mode

5-4) Shipping

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

Press “Left” & “Right” key to select the item. Default set in Factory mode.

Following shipping area to select the item (Factory/Asia/China/S America).

5-5) NV 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), Closed Caption.

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:

This item just enabled in PC input and after this item is processed then the DUT needs to be powered off

then AC powered off.

5-6) 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.

- Video: Contrast maximum value, Brightness maximum value, Backlight maximum value.

- Audio: Volume maximum value, Bass default value, Treble default value.

Press enter key to turn on Full Power and OSD stay display until press enter key to recover from Full Power.

5-7) Auto Calibration

Auto Calibration (gain/offset) must be adjusted color by firmware automatic adjustment in PC, Video1

(Composite) and Video3 input source.

This item will have a result dialog “OK” or “NG”.

5-8) RF Burn In

Use “snow” pattern for burn in. Selected items are “On” and “Off”.

While turn on burn in mode, firmware will automatically turn off “Auto power off” function.

If there is no power supply suddenly, firmware will re-enter burn in mode automatically

when power supply is back.

Pressed the “Power” key, firmware will automatically turn off burn in mode.

- Burn in mode: Source is “ANT”, Input Configuration is “Antenna” and channel is NTSC channel 2.

5-9) Service Mode

Press “Left” & “Right” key to select the item. Default set in “On”.

When use the RS-232 serial port to control LCD TV set to “On”.

When use the F/W update function set to “Off”.

5-10) Reset

Reset all settings of OSD menu to default value.

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

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

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 auto-

correct.

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 (32KHz, 44.1KHz, 48KHz) 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)

M-Star Debug board X1, USB cable X1, PC D-Sub cable X1

Follow below connecter function with PC and LCD TV.

(2)

Turn on LCD TV then press the “Mute” (remote control) and “Menu” (key pad) to enter factory mode.

Setup Service Mode form “ON” to "Off".

Board Name: L19112_Rev.1

VERSION: SSA19C-WXGA V1.0

04/10/09 00:00:00

FACTORY MENU

Cool

Warm

Normal

Shipping

NV Clear

Full Power

uto Calibration

RF Burn In

Service Mode

Reset

< Factory >

< Off >

(3) Execute ISP_Tool.exe file and press “Connect” button.

Fig3 the written file

(4) Press Read file to loading the F/W. ex:SSAXXC.bin

(5) Click “Auto”, and press “Run” button to upgrade F/W

(6) If the process of writing succeeds, it will display “Pass” near “Run”..

(7) Repeat step 2) and 5) to write the program to the other units without exit the ISP interface.

Working principle analysis of the unit

1. PAL/SECAM signal flow:

Antenna reception PAL/NTSC/SECAM signal will be send to tuner TAFT-Z711D,

then Tuner

will be

demodulating and output standard video signal TV-CVBS and sound IF signal (SIF).

TV-CVBS will send to the master control IC MST9A881 or MST9B881 to video decode, de-interlace

and scaler, then output LVDS level drive for panel display.

The sound IF (SIF) will be fed into MST9A881 or MST9B881, after demodulating, pre-amplifying,

bass adjusting and volume control, the sound signal will

be transform into digital I2S

signal by

scaler

and sent to digital amplifier TAS5706 amplifying, then output two ways. One

way will be sent to earphone amplifier TPA6111, another will be sent to speaker.

2. AV/SV signal flow

SV signal and the Video1 path AV signal switch

by menu “Setup”->“AV Connecting”->”Video1

input”

via terminal socket, the signal and the Video2 path AV signal will be fed to MST9A881 or

MST9B881 to perform video decode, de-interlace and scaler, then output LVDS drive level for panel

display.

Audio signal from AV/SV

terminal

via matched resistance is fed to MST9A881 or MST9B881 to bass

adjust and volume control, the sound signal will be

transform into digital I2S signal by scaler IC

and

sent to digital amplifier TAS5706 amplifying, then output two ways. One way will be sent to earphone

amplifier TPA6111, another will be sent to speaker.

3. PC/YPrPb signal flow

PC and the Video3 path YPbPr signal are via terminal sent to MST9A881 or MST9B881 A/D

conversion, output R/G/B of 24 bit to back end module to digital decode, image scale, then send

to LVDS level drive for panel display.

Sound signal of PC/YPrPb

terminal

via matched resistance

and

sent to MST9A881 or

MST9B881 to bass adjust and volume control, the sound signal will be transform into digital I2S signal

by scaler IC and sent to digital amplifier TAS5706 amplifying, then output two ways. One way will be

sent to earphone amplifier TPA6111, another will be sent to speaker.

4. HDMI signal flow

Three HDMI video signals via switcher Sil9185 are directly fed to the master control IC MST9A881

or MST9B881(19” directly into master control IC MST9A881) to digital decode, image scale, then

output LVDS drive level for panel display. HDMI audio signal via decoder built-in MST9A881 or

MST9B881 is fed to back end to bass adjust and volume control, the sound signal will

transform

into digital I2S signal by scaler IC and sent to digital amplifier TAS5706 amplifying, then output two

ways. One way will be sent to earphone amplifier TPA6111, another will be sent to speaker.

Block diagram-ELECTRON-19”26”32”42”

Block diagram-POWER-19”

Block diagram-POWER-26”32”42”

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IC block diagram

1. MST9A881/MST9B881

Feature

z Input supports up to SXGA (MST9A881) & UXGA (MST9B881) &1080P.

z Panel supports up to SXGA (1280X1024 for MST9A881)/WXGA + (1440X900 for MST9A881)/

Full HD (1920X1080 for MST9B991).

z TV decoder with 3-D comb filter.

z Multi-standard TV sound demodulator and decoder.

z 10-bit triple-ADC for TV and GRB/YPbPr.

z 10-bit video data processing.

z Automatic color calibration.

z Integrated DVI/HDCP/HDMI compliant receiver.

z High-quality scaling engine & 3-D video de-interlacer.

z 3-D video noise reduction.

z MstarACE-3 picture/color processing engine.

z Embedded On-Screen Display (OSD) controller engine.

z Built-in MCU supports PWM & GPIO.

z Built-in dual-link 8-bit LVDS transmitter.

z 5-volt tolerant inputs.

z Low EMI and power saving features.

NTSC/PAL/SECAM Video Decoder

z Support NTSC M,NTSC-J,NTSC-4.43,PAL(B,D,G,H,M,N,I,Nc), and SEAM.

z Automatic TV standard detection.

z Supports Teletext level-1.5, WSS, VPS.

z CVBS video output

Multi-Standard TV Sound Decoder

z Supports BTSC/NICAM/A2/EIA-J demodulation and decoding.

z FM stereo & SAP demodulation.

z Built-in audio output DAC’s.

z Audio processing for loudspeaker channel, including volume, balance, mute, tone, EQ, and

Virtual stereo/surround.

Digital Audio Interface

z I

S digital audio input & output.

z HDMI audio channel processing capability.

z Programmable delay for audio/video synchronization.

DVI/HDCP/HDMI Compliant Input Port

z Supports TMDS clock up to 225MHz @ 1080P 60Hz with 12bit deep-color resolution.

z Single link on-chip DVI 1.0 compliant receiver.

z HDCP 1.1 compliant receiver.

z HDMI 1.3 compliant receiver.

z Long-Cable tolerant robust receiving.

Video Processing & Conversion

z 3-D motion adaptive video de-interlacer.

z Edge-oriented adaptive algorithm for smooth low-angel edges.

z Automatic 3:2 pull-down & 2:2 pull-down detection and recovery.

z Programmable 12-bit RGB gamma CLUT

z 3-D video noise reduction.

z Frame rate conversion.

Integrated Micro Controller

z Embedded 8032 micro controller

z Low-speed ADC inputs for system control

Configurable PWM’s and GPIO’s

2. TAFT-Z711D

Multi Media Tuner 2IN1 Tuner with Analog Demodulator

3. TAS5706

Stereo Digital Audio Power Amplifier with EQ and DRC. Support Headphone PWM outputs.

4. SIL9185

HDMI switch, three input, single output. Integrated EDID capability to lower system cost.

Control via local I2C but or stand-alone mode option.

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