Sanyo LCD-50XR12F Schematic

FILE NO.

SERVICE MANUAL

LCD TV

LCD-50XR12F

PRODUCT CODE No.

PRODUCT CODE No. 1 682 351 99: PAL-B/G

NTSC(AV) (Australia)

INPUT

RECALL

Q.TOOL

EPG

LIST

EXIT

MUTE

VOL CH

INFO

ZOOM

TTX

FRZ/MIX

STEREO

INDEX

FAV.LIST

SUBTITLE

TV/RADIO

REFERENCE No.:SM0915221

CONTENTS

Safety precautions………………………………………………………………………..…

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

Software upgrade instructions ..................................................................................

Working principle analysis……………………………….………….…………...............

Block diagram…………………………………..………………………………….…………

IC block diagram………………………………………………………………………..……

Wiring diagram …………………………………………………………………………….

Troubleshooting flow chart ………………………………………………………………..……

Schematic diagram…………………………………………………………………………

APPENDIX-A: Assembly list

APPENDIX-B: Exploded View

Assembling 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 must 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 necessary for the welder to wear anti static gloves. Please refer to the part list before replacing components that have special safety requirements. Do not replace with different components with different specs and type at will.

2. LCD servicing precautions

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 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 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 Operation range +5 ~ +35 oC

Storage range -20 ~ +60 oC

Humidity Operation range 20% ~ 80%

Storage range 10% ~ 90%

2.13 Display of a fixed picture for a long time may cause a permanent after-image on the screen, as commonly called “ghost shadow”. The degree of the after-image 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. Installation precautions

3.1 The front panel of LCD screen is made 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.

Adjustment Instruction

1 Safety Instructions

1.1 Power supply must be cut off when replacing or welding any component or inserting / pulling out

connective lines;

1.2 Anti-electrostatic measures must be carried out during the whole producing processes!

a) Do not touch IC by hands at will;

b) Use anti-electrostatic iron;

c) Welder must wear anti-electrostatic glove;

1.3 Replacing any component with special safety requirement must refer to component list without

changing its specification and model at will.

2 Adjustment Equipments

Multimeter or oscilloscope

VG-849 CA-210 USB storage device DVD ( HDMI 1.4 supported ) or equipments with the same functions

3 Adjustment Processes

3.1 Power voltage checking

According to the wiring diagram specified by “Product Specification”, connect power board assembly, data processing assembly, IR/Key board assembly, backlight board assembly correctly, supply with power, press button

to power on the TV set.

Make sure the voltages of socket X602 each pin on the main board are correct.Voltage value and range are listed as Table 1:

Table 1 Voltage of X601 each pin

X601 Pin1,2 3,4 5,6 7,8 9 10 11 12 13

Voltage 12V±5% 0

Function AMP_PWR GND

V±5%

Main

+12V

0 ≤5.2V

GND PWR_SW

V±5%5 V±5%

Main

+5V

STB

≤5.2 V ≤5.2 V

BL_PWM BL_ON

3.2 Adjustment flow as Fig. 1:

Check if EDID、HDCP KEY、FLASH has been written?

General assembly and combined adjustment

White balance adjustment

Input central signal, check TV function (omitted

channel, analog parameters control, etc. ), check

earphone, speakers output.

Check accessory and packing

Check AV input, output and relevant functions.

Input Component signal, check YPbPr functions.

Default settings before ex-factory

Input D-SUB signal, check display and all functions

(such as analog parameter), H/V center, etc..

Check other functions (Radio、

LCN、HDMI ARC/CEC、OAD, etc.）

Input HDMI signal, check display and all functions

(such as analog parameter), H/V center, etc..

Check USB multimedia port and

Fig. 1 Adjustment flow chart

4 Adjustment Instruction

4.1 The unit adjustment

4.1.1 According to the wiring diagram specified by “Product Specification”, connect

power/backlight board assembly, data processing assembly, IR/Key board assembly correctly, supply

with power, turn on the TV set. Check display.

4.1.2 Factory menu instruction

a) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

b) Press keys “▲” and “▼” to move cursor to each page of primary factory menu, then press

key “OK” to enter into submenu page;

c) Press keys “▲” and “▼” to move cursor upward or downward within any one page;

d) Press keys “◄” and “►” to do adjustment when move cursor to one item;

e) Press key “MENU” to exit submenu page to the superior factory menu;

f) Press key “EXIT” to exit factory menu in any case;

g) Press key “OK” to enter the inferior factory submenu;

h) Factory menu item: Aging Mode to be used for aging the TV set; red, green blue and

white full screen picture displays in turn; default setting is OFF;

i) Factory menu item: ADC ADJUST to be used for ADC calibration for VGA and

Component;

j) Factory menu item: Fac. Channel Preset to be used for factory channel presetting; central

signal digital frequency value for Australia program is set as CH28(529.5 MHz) and

CH33(564.5 MHz); original digital program presetting could not change if central signal setting has any modification, so please search for digital program manually by performing item DTV of menu Channel;

k) Factory menu item: Color Temp. to be used for white balance adjustment;

l) Factory menu item: Store Setting Init.

to be disabled temporarily;

m) Factory menu item: USB SW Update to be used for software updating from USB port;

when U disk with updating software is inserted into USB port, choose the item to

perform updating process;

n) Factory menu item: Other Settings include settings of EEPROM Init, MEMC Update,

Power mode, MST DEBUG, ISP MODE, Backlight, SSC, NONLINEAR, Video Quality, Audio

Quality, Light Sensor, Overscan, etc.; no need any adjustment normally.

Power mode: to be used for setting power-on mode;

Standby: TV set will be in stand-by mode after power-on;

Mem: TV set will keep the last power-off mode after power-on again; Force On: TV set will work automatically after power-on;

Unless specified by customer, Standby mode is default and kept by adjustment;

o) Factory menu item: Shipment to be used for initializing user data; Success flag will display

after initialization, then press KEY POWER only to power off the TV set.

p) Please perform EEPROM Init before adjustment for the first time if software has been

upgraded or data have been kept in EEPROM.

4.1.3 ADC calibration for D-SUB channel

a) Switch to D-SUB channel;

b) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

c) Move cursor to item “ADC ADJUST” and press key “OK” to enter into the inferior submenu;

d) Input D-SUB signal (VG-849 Timing:856 (1024×768/60 Hz), Pattern:914 Chess Pattern);

move cursor to item “MODE”, press keys “▲” and “▼” to choose item “RGB”, then move

cursor to item “AUTO ADC” and press key “OK” to perform auto adjustment until prompt

“success” displays;

4.1.4 ADC calibration for Component channel

a) Switch to Component channel;

b) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

c) Move cursor to item “ADC ADJUST” and press key “OK” to enter into the inferior submenu;

d) Input Component signal (VG-849 Timing:972(1080i), Pattern:918 100% color bar); move

cursor to item “MODE”, press keys “▲” and “▼” to choose item “YPbPr”, then move cursor to

item “AUTO ADC” and press key “OK” to perform auto adjustment until prompt “success”

displays;

4.2 White balance adjustment

Unless specified by customer, default settings of COOL color temperature is 12000K and chromatic coordinates is (272、278); referenced settings of Normal color temperature is 9300K and chromatic coordinates is (285、293); referenced settings of Warm color temperature is 6500K and chromatic coordinates is (313、329);

Default setting is Normal.

4.3 Adjustment procedures

The TV set should be working above 30 minutes to be in a stabler state before adjustment. Use

CA-210 BBY channel to adjust white balance;

a) Switch to HDMI channel;

b) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

c) Move cursor to item “W/B ADJUST” and press key “OK” to enter into the inferior submenu;

d) Input HDMI signal (VG-849 Timing: 972(1080i)，Pattern: 921 16 step Gray);

move cursor to item “MODE”, press keys “▲

” and “▼” to choose item “HDMI”, then move

cursor to item “TEMPERTURE” and press keys “▲” and “▼” to choose “NORMAL”;

e) Fix “G GAIN”, adjust “R GAIN, B GAIN” to set 14

f) Fix “G OFFSET”, adjust “R OFFSET、B OFFSET” to set 4

chromatic coordinates as (285、293);

chromatic coordinates as

(285、293);

g) To make sure chromatic coordinates of bright scale are (X=285±10，Y=293±10) and

chromatic coordinates of dark scale are (X=285±10，Y=293±10) during adjusting;

h) Move cursor to item “COPY ALL” to copy white balance data to other channels except DTV

channel;

i) Check if chromatic coordinates of COOL and WARM meet the requirements (permitted

error of COOL bright scale: x±10，y±10, permitted error of COOL dark scale: x±10， y±10; permitted error of WARM bright scale and dark scale: x±10，y±10); if not, adjust

“R_GAIN /B_GAIN/R_OFF/B_OFF” to be up to the requirements and then save the data;

j) Perform “Copy All” for COOl/Warm adjustments except DTV channel;

k) Check if chromatic coordinates of other channels meet the requirements, if not, do

adjustment for nonstandard channel alone with the same procedures from b) to j) as HDMI

channel’s and then save the data;

l) Switch to DTV channel, change to 16-grey-scale program from central signal source,

adjust white balance with the same procedures from e) to g) ; but pay attention not to

perform “COPY ALL”!

m) Inspect all channels after completing adjustment to check if display is normal;

n) Refer to the following rule for adjustment:

B Gain/Offset: adjust B Gain/Offset downward, coordinates of X and Y will increase, adjust B

Gain/Offset upward, coordinates of X and Y will decrease;

R Gain/Offset: adjust R Gain/Offset will affect X value, but affect Lv value slightly, adjust R

Gain/Offset upward, coordinates of X will increase, adjust R Gain/Offset

downward, coordinates of X will decrease;

G Gain/Offset: adjust G Gain/Offset will affect Y value, and affect Lv value greatly, adjust G

Gain/Offset upward, coordinates of Y will increase, adjust G Gain/Offset

downward, coordinates of Y will decrease;

Note: Sanyo requires that default color temperature is Normal, adjust white balance of color temperature Normal and Cool in Dynamic picture mode; for other customers, please adjust white balance of color temperature Cool in Dynamic picture mode.

5 Function check

5.1 TV functions

Input central signal to RF port, enter into menu Channel first, then search for programs automatically and check if there is any omitted program; check the speakers output and the picture display;

5.2 AV port

Input AV signal with formats listed as Table 1 separately, check picture, sound and other

functions;

Table 1 AV video signal formats

No.

1 525 15.734/15.75 59.94/60 NTSC, NTSC4.43,PAL60,PAL-M

2 625 15.625 50 PAL, PAL-N, SECAM

Lines per

frame

H.- Freq.（kHz） V.- Freq.（Hz）

Note

5.3 Component port

Input Component signal from VG-849 with formats listed as Table 2 separately, check picture and

sound in the case of power-on, switching channel, changing mode, etc.;

Table 2 Component signal formats

No. Definition

1 720×480 15.734/15.75 59.94/60 13.5/13.514 480i (NTSC)

2 720×576 15.625 50 13.5 576i (PAL)

3 720×480 31.469/31.5 59.94/60 27/27.027 480p (NTSC PROG)

4 720×576 31.25 50 27 576p (PAL PROG)

5 1280×720 37.5 50 74.25 720p (50p)

6 1280×720 44.955/45 59.94/60 74.176/74.25 720p (59.94p/60p)

7 1920×1080 28.125 50 74.25 1080i (50i)

8 1920×1080 33.75 59.94/60 74.176/74.25 1080i (59.94p/60p)

9 1920×1080 26.973 23.976 74.176 1080p (23.97p)

10 1920×1080 27 24 74.25 1080p (24p)

11 1920×1080 28.125 25 74.25 1080p (25p)

12 1920×1080 33.716 29.97 74.176 1080p (29.97p)

13 1920×1080 33.75 30 74.25 1080p (30p)

14 1920×1080 56.25 50 148.5 1080p (50p)

15 1920×1080 67.432/67.5 59.94/60 148.35/148.5 1080p (59.94p/60p)

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse Freq.

(MHz)

Note

5.4 D-SUB port

Input D-SUB signal from VG-849 with formats listed as Table 3 separately, check picture and

sound; if H./V. of picture displays abnormally, enter into main menu Picture->Screen->Auto Adjust to

perform auto calibration.

Table 3 D-SUB signal formats

No. Definition

1 640×480 31.469 59.94 25.175 IBM

2 720×400 31.469 70.086 28.322 IBM

3 640×480 37.861 72.809 31.5 VESA

4 640×480 37.5 75 31.5 VESA

5 800×600 35.156 56.25 36 VESA

6 800×600 37.879 60.317 40 VESA

7 800×600 48.077 72.188 50 VESA

8 800×600 46.875 75 49.5 VESA

9 1024×768 48.363 60.004 65 VESA

10 1024×768 56.476 70.069 75 VESA

11 1024×768 60.023 75.029 78.75 VESA

12 1152×864 67.5 75 108 VESA

13 1280×960 60 60 108 VESA

14 1280×1024 63.98 60.02 108 VESA

15 1280×1024 80 75 135 SXGA

16 1360×768 47.7 60 85.5 WXGA

17 1440×900 55.9 60 106.5

18 1680×1050 65.3 60 146.25

19 1920×1080 67.5 60 148.5

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse Freq.

(MHz)

Note

WXGA+ ( Panel

National only)

WSXGA+ ( Panel

National only)

5.5 HDMI port

HDMI port supports all signal formats supported by Component port (Table 2) and D-SUB port

(Table 3), furthermore, it can also support signal with formats listed as Table 4 and Table 5 (video and

audio combination). Check picture and sound in the case of power-on, switching channel, changing

mode, etc.;

Table 4 Digital HDMI signal formats

1 720(1440)×480 15.734/15.75 59.94/60 27/27.027

2 720(1440)×576 15.625 50 27 720(1440)×576i@50 Hz,4:3/16:9

Definition

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse

Freq.

(MHz)

Note

720(1440)×480i@59.94/60 Hz,

4:3/16:9

Table 5 Video & audio signal formats of digital HDMI

No. Item Unit Parameter Note

1 Video

Audio sample

freqence

Audio data

width

kHz

Bit

Deep color：RGB 4:4:4（24 bit/pixel，30 bit/pixel，36 bit/pixel）、

YUV 4:4:4 （24 bit/pixel，30 bit/pixel，36 bit/pixel）、 For "1080p，deep color＂，　only support "30 bit/pixel"

YUV 4:2:2(16 bit)、YUV 4:2:2(20 bit)、YUV 4:2:2(24 bit)

32、44.1、48

16、20、24

5.7 Music port （depending on different models whether contain the port or not） Input audio signal to back VGA MUSIC/AUDIO In port from audio output equipment, check audio

output is normal or not.

5.8 Other functions check

a) Check timing on/off, sleeping time off, picture/sound mode, OSD, stereo, digital audio port,

etc,;

b) Check pure digital audio programs (RADIO) ;

c) Check logical channel number (LCN);

d) Check HDMI ARC;

e) Check HDMI CEC;

f) Check OAD for special customer;

6 User Menu Setting before shipment

Enter into Factory Menu and choose “Shipment” to perform presetting before shipment;

Main procedures are described as follow:

a) Clear out all programs; b) Clear out information of VCHIP，parent control, etc.;

c) Default user analog parameter setting;

d) Recover default password; e) Set Menu Language as English； f) Set Power mode as Standby。

Software Upgrading Instruction

Software Upgrading Instruction as Table 6

Table 6 Software Upgrading Instruction

Software

Location Part No. Part model

function

N103 5272532007 EN25Q32B-104HIP FLASH Yes

N105 5272404005 CAT24C04WI-GT3 HDCP KEY Yes

SMT before

Upgrading method

upgrading

Upgrade with ALL100, etc.,

need write protection, refer to

Note1;

Upgrade with ALL100, etc.

Note 1 Write protection setting method: enter into ALL-100 upgrading interface “AUTO”, tick off

“Config”, press “config Setting”, set option “Protect” as “All Protect” and “SRWD” as “Enable”,

then press “OK” to complete write protection setting;

Please make sure option “Config” is ticked off during software upgrading and reset write

protection after ALL-100 upgrading software is opened each time;

Note 2 Upgrading method with ISP upgrading instrument:

1） Main board upgrading: connect 4-core line of ISP to Debug port (X603) on main board;

The Unit upgrading: connect both VGA ports of ISP and main board, enter into factory menu and set “ISP Mode” as “ON”;

2） Use Mstar upgrading instrument (V4.4.2.0 or higher version), enter into menu “Device”, tick off

“WP Pin pull to high during ISP” to make sure Flash hardware write protection is removed and

erasing process is normal; please refer to Fig.2;

Fig. 2 Write protection setting

3） Press menu “Connect”, dialog box “Device Type is MX25L64” (device type depending on parts

used on board actually) will display to show successful connection; please refer to Fig. 3;

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