Sanyo LCD-19R30 Schematic

FILE NO.

SERVICE MANUAL LCD-19R30

PRODUCT CODE No.

LCD TV

1 682 348 10: P/S BG/DK/I

REFERENCE No.:SM0915068

CONTENTS

Safety precautions…………………………………………………………………1

Alignment instructions……………………………………………………………..3

Software upgrade method…………………………………………………………8

Block diagram………………………………………………………………………10

IC block diagram……………………………………………………………………11

Troubleshooting guide……………………………………………………………..12

Schematic diagram………………………………………………………………...20

APPENDIX-A: Assembly list

APPENDIX-B: Exploded view

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 700-825V. 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 met al 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 thermotropic glue need to disengage when service, please soak the thermotropic glue into the alcohol and then pull them out in case of dagmage.

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 0 ~ +50 oC

Scope for storage -20 ~ +60 oC

Humidity Scope for operation 20% ~ 85%

Scope for storage 10% ~ 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. Alignment equipments

 Digital Multimeter  Signal Generator (54200)  Personal Computer (FLASH writing tool pre-installed)  VG848 & VG849 (VGA, YPbPr, HDMI signal generator)  DVD player with HDMI jack  CA210 (white balancer)

 Monitor

2. Power voltage test and alignment flow chart

2.1 Power voltage test

According to wiring diagram connect all boards correctly. Connect power and press POWER button to turn on the TV.

In turn measure XJ01 all pin voltage. The data is shown below (Table 1).

Table 1: XJ01 all pin voltage

XJ01 Pin1 2 3

Voltage >2.5 V 0～3.3 V 0 11.4 V～12.6 V 0 31.4 V～32.6 V 4.75 V～5.25 V 0 4.75 V～5.25 V 0 >2.5 V

4、5 6、7

8 9 10 11 12 13

2.2 Alignment flow chart (Fig.1)

Check if DDC, FLASH, KEYis written

Data process board making

Complete set alignment

White balance alignment

Input signal and check all TV function (no lost program, analog

control be normal). Check earphone and speaker output is normal.

Check if AV/SVIDEO/SCART input is normal

Check if VGA input is normal. Check VGA mode analog control, H/V-center, etc.

Check if HDMI input is normal. Check all the function at this mode.

Check if YPbPrinput is normal

Defaults preset

Check accessory, then pack the TV

3. Alignment instructions

3.1 Complete set alignment

3.1.1 According to wiring diagram connect all boards correct ly. Power on the TV , check if the d isplay

is normal.

3.1.2 Factory menu usage

a) First press “INPUT” button, then in turn press “2、5、8、0” to access factory main menu. b) Press “” and “” to select item, then press “” to access.

c) Press “” and “” to move upward or downward and select item. d) Press “” and “” to adjust. e) Press “MENU” to return to the previous screen.

3.2 White balance adjustment

3.2.1 Preparations before adjustment

Before white balance adjustment, let the TV work for more than 30 minutes so the TV will be in stable status. Then use white balancer CA210 to adjust. a) When adjusting in VGA mode, input VESA800×600/60Hz (for VG848 Timing, input 854) format signal with crosshatch pattern. Go to user menu, select VGA Settings from Setup menu, then select Auto to perform auto correction so that the picture can be displayed wholly. Then input signal from VG848 with PATTERN of 914, go to factory menu and select ADC ADJUST to perform AUTO ADC until “Complete” appears. b) When adjusting in YPbPr mode, first input 480i/60 Hz format signal with 75% color bar plus gray scale (VG848 Timing, input 968, PAT 918). Go to factory menu, select ADC ADJUST to perform AUTO ADC until “Complete” appears. c) In this chassis only perform NORMAL color temperature alignment. During alignment please guarantee that bright step’s color temperature to be △X≤±5, △ Y≤±5, dark step color temperature to be △X≤±10, △Y≤±10. Depending on different LCD panel type (non-TN panel & TN panel), the color temperature requirement is different. See below table 2.

Panel type Cool Normal Warm Non-TN panel 12000K（272、278） 9300K（285、293） 6500K（313、329） TN panel 10000K（280、288） 8000K（295、305） 6500K（313、329）

Table 2: Color temperature requirements

3.2.2 Four channels white balance adjustment

3.2.2.1 For AV channel (TV/S-VIDEO/SCART is the same)

Through AV channel, input 8-step gray scale signal (VG848 Timing, input 969, PAT 920), go to factory menu and access Color Temperature menu page, fix G-GAIN, adjust R-GAIN and B-GAIN to

make the 7 B-OFFSET to make the 2 adjust R-GAIN, B-GAIN and R-OFFSET, B-OFFSET until both the first and second steps’ chromaticity coordinates be (295, 305).

3.2.2.2 For DVI channel (HDMI is the same)

Through DVI channel, input 8-step gray scale signal (VG848 Timing input 854, PAT 920), go to factory menu and access color temperature menu page, fix G-GAIN, adjust R-GAIN and B-GAIN to make the 7 B-OFFSET to make the 2

step chromaticity coordinates be (295, 305). Fix G-OFFSET, adjust R-OFFSET and

step chromaticity coordinates be (295, 305). In this way repeatedly

step chromaticity coordinates be (295, 305). Fix G-OFFSET, adjust R-OFFSET and

step chromaticity coordinates be (295, 305). In this way repeatedly adjust R-GAIN, B-GAIN and R-OFFSET, B-OFFSET until both the first and second steps’ chromaticity coordinates be (295, 305).

3.2.2.3 For YPbPr channel

Through YPbPr channel input 8-step gray scale signal (VG848 Timing, input 968, PAT 920), go to factory menu and access color temperature menu page, fix G-GAIN, adjust R-GAIN and B-GAIN to

make the 7 B-OFFSET to make the 2

step chromaticity coordinates be (295, 305). Fix G-OFFSET, adjust R-OFFSET and

step chromaticity coordinates be (295, 305). In this way repeatedly adjust R-GAIN, B-GAIN and R-OFFSET, B-OFFSET until both the first and second steps’ chromaticity coordinates be (295, 305).

3.2.2.4 For VGA channel

Through VGA channel input 8-step gray scale signal (VG848 Timing, input 854, PAT 920), go to factory menu and access color temperature menu page, fix G-GAIN, adjust R-GAIN and B-GAIN to

make the 7 B-OFFSET to make the 2

step chromaticity coordinates be (295, 305). Fix G-OFFSET, adjust R-OFFSET and

step chromaticity coordinates be (295, 305). In this way repeatedly adjust R-GAIN, B-GAIN and R-OFFSET, B-OFFSET until both the first and second steps’ chromaticity coordinates be (295, 305).

4. Performance check

4.1 TV function check

Input RF signal. Open the user menu and first go to Channel menu, perform auto scan to check if there is any program lost. Check speaker output normally and picture is displayed normally.

4.2 AV/SVIDEO/SCART input check

Respectively input signal through AV/SVIDEO/SCART, check if picture and sound are normal.

4.3 YPbPr/YCbCr input check

Respectively input all format YUV signal (shown at below table 3) by VG848 signal generator and check picture display and sound are normal.

Table 3: Component (YUV) signal format

# Resolution

712×484@59.94/60 Hz

702×574@50Hz

720×483p@59.94/60 Hz

720×576p@50 Hz

1280×720@50 Hz

1280×720p@59.94/60 Hz

H-freq.

kHz

15.734 59.94/60 13.50 480i(59.94/60p)

15.625 50 13.50 576i/50

31.469 59.94/60 27.00 480p(59.94/60p)

31.25 50 27.00 576p/50

37.50 50 74.25 720p/50

44.96 59.94 74.18 720p(59.94/60p)

V-freq.

Dot-clock freq.

MHz

Remarks

1920×1080i@50Hz 1920×1080i@59.94/60 Hz

1920×1080p@23.98/24 Hz

1920×1080p@50Hz

1920×1080p@59.94/60 Hz

28.125 50 74.25 1080i/50

33.75 59.94 74.25 1080i(59.94/60i)

27.00 23.98/24 74.25 1080p(23.98/24p)

56.25 50 148.50 1080p/50

67.50 60.00 148.50 1080p(59.94/60p)

4.4 VGA input check

Respectively input all format VGA signal (shown at below table 4) by VG848 signal generator. Check if the display and sound are normal. If picture has deviation in horizontal and vertical direction, perform auto correction by making use of Setup menu/VGA Settings/Auto item.

Table 4: PC signal format

# Resolution

720×400@70 Hz

640×480@60 Hz

640×480@72 Hz

640×480@75 Hz

800×600@60 Hz

800×600@70 Hz

800×600@75 Hz

31.47 70.08 28.32 DOS

31.50 60.00 25.18 VESA

37.90 72.00 31.50 VESA

37.50 75.00 31.50 VESA

37.90 60.00 40.00 VESA

46.90 72.19 49.50 VESA

48.08 75.00 50.00 VESA

H-freq.

kHz

V-freq.

Dot-clock freq.

MHz

Remarks

1024×768@60 Hz

1024×768@70 Hz

1024×768@75 Hz

1360×768@60 Hz

48.40 60.00 65.00 VESA

56.50 70.00 75.00 VESA

60.00 75.00 78.75 VESA

47.71 60.01 85.50 VESA

4.5 HDMI input check

Respectively input all format HDMI signal (shown at below table 5) by VG849 signal generator, check if picture display and sound are normal.

Table 5: HDMI signal format

# Resolution H-freq. (kHz) V-freq. (Hz)

712×484@59.94/60 Hz

8 9

702×574@50Hz 720×483p@59.94/60 Hz 720×576p@50 Hz 1280×720@50 Hz

1280×720p@59.94/60 Hz 1920×1080i@50Hz 1920×1080i@59.94/60 Hz 1920×1080p@23.98/24 Hz 1920×1080p@50Hz 1920×1080p@59.94/60 Hz

15.734 59.94/60 13.50 480i(59.94/60p)

15.625 50 13.50 576i/50

31.469 59.94/60 27.00 480p(59.94/60p)

31.25 50 27.00 576p/50

37.50 50 74.25 720p/50

44.96 59.94 74.18 720p(59.94/60p)

28.125 50 74.25 1080i/50

33.75 59.94 74.25 1080i(59.94/60i)

27.00 23.98/24 74.25 1080p(23.98/24p)

56.25 50 148.50 1080p/50

67.50 60.00 148.50 1080p(59.94/60p)

Note: A DVI device also can be connected to the HDMI jack by using a DVI to HDMI adapter cable. About supported DVI signal format, please refer to table 4 PC signal format and table 5.

Dot-clock freq.

MHz)

Remarks

4.6 HDMI sound supporting format

HDMI sound only supports PCM format, its sample rate supports 32 KHz, 44 KHz and 48 KHz.

5. Default setting for user menu

Go to factory menu “User Menu Init” item, press ENTER button on the remote control, then the TV will preset all settings to default. After factory alignment, this step must be done surely.

6. Packing

Check accessory then pack the TV.

Software upgrade method

1 Using USB port to upgrade (it is suggested to use this method in preference)

1.1 Precautions

The upgrade file must be saved under root category of USB device, and the file name must be changed to “KU19P.BIN” or “ku19p.bin”.

1.2 Upgrade steps:

a) Copy the provided “KU*.bin” file to USB device root category. Then change the file name to “ku19p.bin” or “KU19P.BIN”. b) Completely cut off the TV power by unplug the power cord from the power outlet. (Be sure to use buttons on the remote control or on the TV to completely discharge the TV after power off). c) Insert the USB device into the USB port. Keep holding any button (except POWER button) on the TV and then plug the power cord into the power outlet, after about 2-3s release the button, the software begins to upgrade automatically. Note that during upgrade the USB device can not be removed and the TV can not be power off. d) During the process operate according to hints provided on the screen. When complete, remove the USB device, unplug the power cord and then plug it again, then press POWER to turn on the TV. e) After software upgrade the TV must be performed initialization and ADC correction and white balance alignment again. Below are steps for initialization: ⅰ. Go to factory menu, select the third item “Feature & Adjust”.

ⅱ. Go to “Feature & Adjust” sub-menu, select “EEPROM Init” at the first line.

ⅲ. Press “” (RIGHT arrow button) to perform initialization. During the process the message

“Please Wait” will be displayed. When complete, “OK” is displayed.

Block Diagram

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