Sanyo LCD- 19E3 Schematic

FILE NO

SERVICE MANUAL

LCD TV

LCD-19E3

PRODUCT CODE No.: 1 682 347 58 CHASSIS NO. : SSA19TT-00 /

SSA19TC-00

LCD-

26E3

PRODUCT CODE No.: 1 682 347 80 CHASSIS NO. : SSA26TT-00

LCD-32E3

PRODUCT CODE No.: 1 682 347 59 CHASSIS NO. : SSA32TT-00 /

SSA32TG-00

LCD-

42E3

PRODUCT CODE No.: 1 682 347 67 CHASSIS NO. : SSA42TT-00 /

SSA42TT-01

REFERENCE No.:SM0945002-04

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:

please read the following points carefully.

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

servicing

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

0 ~

+ 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.

Alignment instructions

1. Test equipment

VG-848 (Video, YPbPr and VGA signal generator) VG-849 (

Video, YPbPr, VGA and

HDMI signal generator) FLUKE 54200(TV signal generator) CA210

2. Power test

(white balancer)

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

P802 Pin1,2

Voltage

GND 22.8-25.2V

Pin3,4 Pin5,6,7

GND 11.4-12.6V 4.75-5.25V

For42”/32”/26”

Pin8,9 Pin10,11,12

On:2V-5.5V

Off: 0-0.5V

P802 Pin1,2 Pin3,4 Pin5,6,7

Voltage GND 11.4-12.6V

GND 11.4-12.6V 4.75-5.25V

For 19”

Pin8,9 Pin10,11,12

On:2V-5.5V

Off: 0-0.5V

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

Table2 voltage data of P803

P803 Pin1,2,3,4,5 Pin6,7,8,9,10

Voltage

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

For42”/32”/26 only

Pin11 Pin12 Pin13 Pin14

Pin13 Pin14 Pin15 Pin16

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

Pin13 Pin14 Pin15 Pin16

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

3. Alignment flow-chart

The alignment flow-chart is shown as fig-1

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

Check the output of earphone and speaker.

Check if DDC, HDCP KEY, FLASH are written

Combined test for general assembly

White balance adjustment

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 remote controller buttons “<”, “EXIT” and “>” 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 TV input source to YPbPr; ASTRO-859 signal setting to PG2 program number 924.

(PG2 mode Timing 924 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 ˴.

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

4-1.3. Change Astro859 Timing to No.933 (1080i) and keep pattern on 924(color bar). Repeat step 4-1.2 to do source calibration,

4-1.4. Change input source to PC.

Change Astro859 Timing to No.953 (640x480@60Hz) and keep pattern on 924(color bar). Repeat step 4-1.2 to do source calibration,

4-2. Color Temperature Adjustment & Check

4-2.1. Set input source to Video1.

Set the signal generator Astro-859 timing to PG2-924(NTSC 480i@60Hz).

Set Astro-859 pattern to PG2-999, Level: 0.7V (100%), press Astro-859 “FORMAT” key and key, then

adjust RGB value to R:204, G:204, B:204

4-2.2. In factory mode OSD menu, select “Cool” item, press “OK” key to enter the item.

R, G, B drive values are set for Warm, Medium, and Cool independently.

4-2.3. S˸ʳ˖˿ʳ˧˸˸˴˸ʳ˹ʳϘ˪˴ϙʿʳϘˠ˸˷˼ϙʳ˴˷ʳϘ˖˿ϙʳ˼˻ʳ˹˿˿˼˺ʳ˸˶ʳ˴˵˿˸ˁ

Color temperature(for 26",32",42")

Color Temp. Cool Medium Warm

x 0.267 0.281 0.301

y 0.271 0.288 0.310

Tolerance ± 0.003 ± 0.003 ± 0.003

Color temperature(for 19")

Color Temp. Cool Medium Warm

x 0.291 0.300 0.314

y 0.300 0.310 0.323

Tolerance ± 0.003 ± 0.003 ± 0.003

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

4-2.6 Exit Factory Mode:

After finishing 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 Color Temperature Warn -> Color Temperature Medium -> Color Temperature Cool ->Preset Channel-> Source Calibration -> Reset to Default.

The NV Clear and Reset to Default items will have a check dialog “YES” and “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 top.

5-1) Color Temperature for 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

5-2) Color Temperature for Medium

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) Color Temperature for 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

5-4) Time Clear

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

Press “Left” & “Right” key to select the item.

The timer on bottom is to record power on time for panel life.

It was set one time on production only.

5-5) 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: Channel table, Mode 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 to do the initial or not.

NOTICE:

After this item is processed, 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 right key to turn on Full Power and OSD stay display until press enter key to recover from Full Power.

Select firmware,

press OK

Wait 2 minutes.

Don’t power off. Don’t remove USB device

5-7) Source 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) Reset to Default

This function is same as “NVRAM Clear”, but it will power off automatically after processing this function.

5-9) 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 “TV”, Input Configuration is “Antenna” and channel is NTSC channel 2.

5-10) USB F/W Upgrade

The function is using USB device to upgrade firmware via USB port.

Copy the firmware file to USB device root path.

Execute this function to update firmware, the following OSD will display.

Note: After finishing updated, the system will reboot automatically

5-11) Protocol Switch

This is for debugging only. It is no use for service.

5-12) ˘˗˜˗ʳ˪˼˸

This is for internal EDID. It’s no used now.

6. Dealer Mode Function

Press keypad “Menu” key and remote controller “Info” button to enter Dealer Mode function.

The Dealer Mode has 8 options: Dealer mode On/Off, Volume

Lock, Tuning Lock, Start Mode, OSD, RC, AC Power Mode and

Reset.

6-1) Dealer mode On/Off

This item is to switch Dealer mode to on or off.

The default setting is “Off”.

6-2) Volume Lock

This function is used to limit the maximal volume.

To switch the Volume Lock from off to on, it will use current volume to be maximal limit volume.

The default setting is “Off”.

6-3) Tuning Lock

If Tuning Lock is set to on, the TV Channel Menu will be disabled.

The default setting is “Off”.

6-4) Start Mode

Start Mode is setting the source when you power on. There are If you want to set TV channel number, you must select source input to TV before you entering Dealer Mode. When you select Start Mode to “TV”, then exit dealer mode, it will use current TV channel number. The default setting is “Off”.

6-5) OSD

When this item set to “Off”, the OSD menu will not display on TV screen to prohibit user to use menu operation.

6-6) RC

When this item set to “Prohibit”, the remote controller will be prohibited to use.

But user still can use remote controller to enter dealer mode or factory mode.

The default setting is “Normal”.

6-7) AC Power Mode

This item has “On”, “Last” and “Standy” options.

“On”: When AC power is on, the TV will DC power on automatically.

“Standby”: When AC power is on, the TV will enter Standby mode.

“Last”: It will record the DC status last time AC power off. If TV is in Standby mode last time AC power off, TV will in Standby mode when AC power on. If TV is on when AC power off last time, TV will directly DC power on when AC power on.

6-8) Reset

This function will return all user setting values to factory default setting.

7. Performance check

7-1 TV function

Connect RF to the center signal source, enter Channel menu ĺChannel Scan, 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 YPbPr 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

YPbPr

signal format

Signal mode

Horizontal frequency

Dot clock frequency

Signal name Resolution Vertical frequency(Hz) (KHz) (MHz)

Remarks

1 480i 720(1440)x480 59.94 15.73 27

2 480P 720x480 59.94 31.47 27

3 720P/60 1280x720 60 45

74.25 ʳ

4 1080i/60

1920x1080

60 33.75

74.25 ʳ

7-4

PC(

VGA) terminal

Input

PC(V

GA) 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->PC->Auto Adjust to perform autocorrect.

Table5

signal format

Signal mode

Horizontal frequency

Dot clock

frequency

Signal name Resolution Vertical frequency(Hz) (KHz) (MHz)

Remarks

1 640 x 400 70.09 31.47 25.18 DOS

VGA

640 x 480 59.941 31.469 25.175 ʳ

3 SVGA 800 x 600 60.317 37.879 40 ʳ

4 XGA 1024 x 768 60.004 48.363 65 ʳ

5 1280 x 768 59.87 47.776 79.5 ʳ

W-XGA

1360 x 768 60.015 47.712 85.5 ʳ

7 SXGA 1280 x 1024 60.02 63.981 108 (42" Full-HD Only)

7-5 HDMI terminal

Signal mode

Horizontal

frequency

Dot clock

frequency

Signal

name

Resolution

Vertical

frequency(Hz)

(KHz) (MHz)

Remarks

1 VGA 640 x 480 59.94 31.469 25.175 ʳ

2 SVGA 800 x 600 60.317 37.879 40 ʳ

3 XGA 1024 x 768 60.004 48.363 65 ʳ

4 1280 x 768 59.87 47.776 79.5 ʳ

W-XGA

1360 x 768 60.015 47.712 85.5 ʳ

6 SXGA 1280 x 1024 60.02 63.981 108 ʳ

7 480i 720(1440)x480 59.94 15.734 27 ʳ

8 480P 720x480 59.94 31.5 27.03 ʳ

9 720P/60 1280x720 60 45

74.25

10 1080i/60

1920x1080

60 33.75

74.25

11 1080p/60

1920x1080

60 67.5

148.5 32" and 42" Only

12 1080p/24

1920x1080

24 27

74.25 32" and 42" Only

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

Chip, etc.

Input HDMI signal (VG849 signal generator), separately input the signals listed in table6 and check the display and sound (32KHz, 44.1KHz, 48KHz) at any situation (power on, channel switch and format convert, etc.)

Table6

signal format

Working principle analysis of the unit

1. NTSC/ATSC signal flow: Antenna reception NTSC/ATSC signal will be send to tuner U25, demodulating and output standard video signal TV-CVBS and sound IF signal (SIF). TV-CVBS will send to the master control IC U9 to video decode, de-interlace and scaler, then output LVDS level drive for panel display. The sound IF (SIF) will be fed into U9, after demodulating, pre-amplifying, bass adjusting and volume control, the sound signal will and sent to digital amplifier U24 amplifying,

2. AV/SV signal flow SV signal and the Video1 path AV signal switch input” video decode, de-interlace and scaler, then output LVDS drive level for panel display. Audio signal from AV/SV control, the sound signal will be amplifier U24 amplifying,

3. PC/YPrPb signal flow PC and the Video3 path YPbPr signal are via terminal sent to U9 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 volume control, the sound signal will be transform into digital I2S signal by scaler IC and sent to digital amplifier U24 amplifying,

via terminal socket, the signal and the Video2 path AV signal will be fed to U9 to perform

terminal

output to speaker

te r m i n a l

then output to speaker

be tran s f o r m int o d i g i t a l I2S si g n al by

then output to speaker

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

via matched resistance is fed to U9 to bass adjust and volume

transform into digital I2S signal by scaler IC

via matched resistance

an d

t h e n T u n e r w i l l be

scaler

and sent to digital

sent to U9 to bass adjust and

4. HDMI signal flow Three HDMI video signals via terminal sent to drive level for panel display. HDMI audio signal via decoder built-in terminal sent to end to bass adjust and volume control, the sound signal will scaler IC and sent to digital amplifier

U24

to digital decode, image scale, then output LVDS

amplifying,

b e

transform into digital I2S signal by

then output to speaker

is fed to back

Block diagram-SANYO (19", 26", 32", 42") ATSC model System Diagram

Block diagram-POWER-19”

Block diagram-POWER-26”32”42”

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IC block diagram

Feature

Demodulator

ATSC A/53 compliant 8VSB receiver /w QAM.

zIF AGC control interface x 1ch, Smart antenna control

interface(CEA-909) x 1ch

System decoder (Stream demultiplexer)

Video and audio ES stream filtering 1

zSection filtering: max. 32 PIDs

MPEG video decoder

Single ISO-13818-2 MP@ML or MP@HL support

zSupports decoding of all ATSC-compliant formats

2D Graphics

CEA-608/CEA-708-B closed caption support

Display processor, Video input/output

Resolution depends on the grade.

zInput: CVBS 3 (tuner/Ext. CVBS), Y/C 1, YPbPr 1, RGB 1

zHDMI x (0 - 3; number of channels depends on the grade)

zOutput: 10-bit dual LVDS

Audio decoder

zATSC A/52 Clear QAM compliant audio decoding support

zSound Demodulator

Inputs: SIF x1, Stereo x1\

Outputs: PCM (I2S) 1, S/PDIF 1, Stereo x1

Main CPU

z32bit RISC Super-H architecture SH3 CPU core

Peripheral interfaces

UART 1, I2C 2, USB FullSpeed x1

zSerial I/Os

Memory interfaces

Serial Flash

z16b width DDR2 800Mbps SDRAM x 1

Power, clock and package

1.20(r0.06)V, 1.8(r0.1)V, 3.3(r0.15)V

z25MHz X’tal

z376pin PBGA

1. Renesas R8J66955-RFJZ , R8J66956-RFJZ , R8J66957BG-RFJZ

2. Block diagram

19” HD Block

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