Sanyo LCD- 24XR10F Schematic

FILE NO.

SERVICE MANUAL

LCD TV

LCD-24XR10F

PRODUCT CODE No.

PRODUCT CODE No. 1 682 349 40: PAL-BG(TV) DTV

REFERENCE No.:SM0915094

CONTENTS

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

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

Method of software upgrading instructions………………………………………………..

Working principle analysis of the unit……………………………….………….………….

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

IC block diagram and instruction…………………………………………………………..……

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

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

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

APPENDIX-A: Main assembly list

APPENDIX-B: Exploded View

Assemble & Disassemble the Pedestal Base

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 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 Scope for operation

~ +35

Scope for storage -15~ +45 oC

Humidity Scope for operation 20% ~ 80%

Scope for storage <= 80%

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. Safety Instructions

2. Test equipment

VG-848 (VGA, YPbPr signal generator) VG-849 (HDMI digital video signal generator) CA210 (color analyzer)

3 Alignment flow

3.1 Voltage of power supply test

According to the wiring of “9224KH5201JL”, connect main board, power board and IR board

correctly, then switch on the main power and press key “standby” to turn on the set.

a) Test voltage of socket X401 each pin in turn, please refer to voltage values of Table 1:

Table 1 Voltage of X401 each pin

X108 Pin1 2 3 4 5 6

Vol.

>2.5

4.85 V ～

5.35 V

4.85 V ～

5.35 V

0 0

7 、8 9 、10

11. 4 V ～

12.6 V

11 12 13

3.2 V ～

3.4 V

4.9 V ～

5.1 V

3.2 Alignment flow chart as Fig. 1

Check if DDC, HDCP KEY, FLASH have been burned?

Combination alignment for general assembly

White balance alignment

Connect to central signal source, check if TV functions are normal-omitted channel, analog

parameters control, etc.? Check if the output of earphone and speakers are normal?

Input AV signal, check if AV functions are normal?

Input high-definition component signal (mode), check YPbPr functions are normal?

Input VGA signal, check if display and other functions are

normal - analog parameters control, H/V center, etc.?

Input HDMI signal, check if display and other functions are

normal - analog parameters control, H/V center, etc.?

Setup before shipment

Accessories checkup and packing

Fig. 1 Alignment flow chart

4 Alignment instrucitons

4.1 Unit adjustment

4.1.1 According to the wiring of “9224KH5201JL”, connect main board, power board and IR board

correctly, then switch on the main power and press key “standby” to turn on the set. Check if display is

normal?

4.1.2 Using method of factory menu

a) Press key “SOURCE” first, then press keys “2, 5, 8, 0” in turn to enter into initial factory

menu;

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

to enter into adjusting menu of each page;

c) Press keys “▲” and “▼” to move cursor upwards or downwards within any page;

d) Press keys “◄” and “►” to do adjustment when cursor is moved to any item;

e) Press key “MENU” to exit menu of any page to its superior factory menu;

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

g) Press key “OK” to enter into inferior factory menu;

h) Factory menu item: ADC ADJUST, for ADC calibration of VGA and Component;

i) Factory menu item: W/B ADJUST, for white balance adjustment;

j) Factory menu item: Fac. CHANNEL PRESET, for factory channels presetting; it is

necessary to connect to central signal source before operating the item; now digital frequency of central signal CH28（529.5 MHz）and CH33（564.5 MHz）are distributed to

Australia programs; originally presetting digital programs will not change along with the

modification of central signal, so please operate item “DTV” of menu “Channel” to search

digital programs manually, which will last about 15s;

k) Factory menu item: EEPROM Init, for factory and customer data initialization; the set will

reset and initial guiding interface will display after executing the item;

l) Factory menu item: Aging Mode， for aging of machines at factory; keys of remote control

are still working after being aging mode, and pressing keys on key board can exit aging

mode;

m) Factory menu item: Backlight, for adjusting brightness of backlight; test voltage of

X401-12# (PWM) while adjusting the item to meet the requirements of PWM voltage scope

corresponding to mixture brightness in panel specification; the item need not adjustment for

it is preset by software;

n) Factory menu item: Other Setting->MST DEBUG, default setting is “OFF”, it will not be

kept in memory, that is, it will always in “OFF” mode after turning on the set again;

“OFF”: RS232 functions of some engineering machines can match design specifications;

“ON”: It is convenient for design tools to debug the software;

o) Factory menu item: Other Setting->SSC ADJUST, for expanded spectrum adjustment;

the item need not adjustment for it is preset by software;

p) Factory menu item: Other Setting->AUDIO Curve Setting, for sound curve adjustment;

if without special customer requirements, the item need not adjustment commonly for it is

preset by software;

q) Factory menu item: Software Update, for software upgrading; please refer to upgrading

instructions in detail;

r) Factory menu item: POWER Mode, for setting power-on mode; the default setting is

“Standby” mode unless specified by customer;

Standby: The set will be in “standby” mode after power-on;

MEM: The set will keep states before last power-off;

ForceOn: The set will turn on automatically; it also can be used as aging mode at factory;

s) Factory menu item: Shipment, all DTV/ATV programs for factory adjustment will be

cleared out first, then ATV channels will be preset according to customer requirements; the

item must be executed before shipment to clear out channels for factory adjustment;

t) Factory menu item: Other Setting->ISP Mode, the item will not be kept in memory, that

is, it will be always in “OFF” mode after turning on again;

“ON”: Upgrading unit software through VGA port while connecting to ISP apparatus;

“OFF”: Normal DDC functions of VGA port will recover;

Note: If there are date in EEPROM or upgrading software, please execute item “RESET ALL” to

clear out all data before adjustment for the first time.

4.2 ADC calibration

4.2.1 ADC calibration of VGA

1） Switch “source” to VGA channel; 2） Press key “SOURCE”, then press keys “2, 5, 8, 0” in turn to enter into initial factory menu; 3） Move cursor to item “ADC ADJUST” and press key “OK” to enter into inferior factory menu; 4） Input VGA signal（VG848: Timing 856（1024×768/60 Hz）, Pattern 914 Color Temp）; move

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

item “AUTO ADC” and press key “OK” to begin auto-adjustment until completing the

calibration.

4.2.2 ADC calibration of YPbPr

1） Switch “source” to YPbPr channel; 2） Press key “SOURCE”, then press keys “2, 5, 8, 0” in turn to enter into initial factory menu;

Move cursor to item “ADC ADJUST” and press key “OK” to enter into inferior factory menu;

3） 4） Input Y/Pb/Pr signal（VG848: Timing 976（1080i）,Pattern 918 SMPTE Color Bar）; move

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

item “AUTO ADC” and press key “ENTER” to begin auto-adjustment until completing the

calibration, prompt “SUCCESS” displaying below “AUTO ADC” means successful

auto-calibration.

4.3 White balance adjustment

Unless specified by customer, default color temperature “COOL” is 10000K and its chromatic

coordinates is (280、288); color temperature “NORMAL” is 8000K and its chromatic coordinates is (295、305); color temperature “WARM” is 6500K and its chromatic coordinates is (323、329);

4.3.1 Adjustment procedure

The set should be working over 30 mins to be in stabler state before white balance adjustment;

Use white balance apparatus CA210 and switch to its BBY channel.

1） Switch “source” to HDMI channel; 2） Press key “SOURCE”, then press keys “2, 5, 8, 0” in turn to enter into initial factory menu; 3） Move cursor to item “W/B ADJUST” and press key “OK” to enter into inferior factory meny; 4） Input DVI/HDMI signal (16 Gray Scale Signal: 1024×768/60Hz

PATTERN:921); move cursor to item “MODE”, press keys “▲” and “▼” to select item

“HDMI1” or other HDMI channels, then move cursor to item “TEMPERATURE” and press

keys “▲” and “▼” to select item “COOL”;

, TIMING: 856,

5） Adjust items “R-GAIN, G-GAIN, B-GAIN” to set chromatic coordinates of 14th scale as

(272, 278);

6） Adjust items “R-OFFSET, G-OFFSET, B-OFFSET” to set chromatic coordinates of 4

scale

as (272, 278);

7） During adjustment, make sure that chromatic coordinates of bright scale are (X=272±10,

Y=278±10) and chromatic coordinates of dark scale are (X=272±10, Y=278±10);

8） Move cursor to item “COPY ALL” again to copy data of white balance to other channels

except DTV;

9） Check if chromatic coordinates of HDMI NORMAL and WARM meet the requirements of

error allowance (dark scale: ±10, bright scale: ±10) or not, otherwise adjust items

“R_GAIN/B_GAIN/R_OFF/B_OFF” to meet them and then save the data;

10）Switch to other channels (AT V, AV，COMPONENT，D-SUB), check if chromatic coordinates

of COOL, NORMAL and WARM meet the requirements or not, if not, adjust them

respectively in the same way of HDMI and with 16 gray scale signal; exit menu “W/B

ADJUST” after adjustment, the data will be save automatically;

11) DTV adjustment: switch to DTV channel, select 16 gray scale program, enter into factory

menu, do adjustment following above step 5, 6, 7;

12) Please refer to the adjusting rules as follows:

B Gun: coordinates of X and Y will increase when B gun is adjusted downwards;

coordinates of X and Y will decrease when B gun is adjusted upwnwards;

R Gun: adjusting R gun will effect coordinate of X, and value of Lv slightly;

coordinate of X will increase when R gun is adjusted upwards;

coordinate of X will decrease when R

gun is adjusted downwards;

G Gun: adjusting G gun will effect coordinate of Y, and value of Lv greatly;

coordinate of Y will increase when R gun is adjusted upwards;

coordinate of Y will decrease when R gun is adjusted downwards;

Note: Default color temperature specified by SANYO customer is Normal, adjust chromatic

coordinates of Normal and Cool in Dynamic picture mode; adjust chromatic coordinates of Cool in

Dynamic picture mode for other customers.

4.4 Auto white balance adjustment

4.4.1 System block diagram shown as Fig. 2

G848

RS232

USB to RS232

Specific USB to Mini

Test Signal

CA210

Optical

Probe

Fig. 2 System block diagram

4.4.2 Drive program and communication setup

4.4.2.1 Specific drive program must be set up for interfaces of PC and CA210, please refer to

detailed procedures as below:

a) Power on CA210, a dialog box shown as Fig. 3 will display for the first installation after data line

is connected normally;

Fig. 3 Dialog box

b) Select option “Install from list or specific location (Advanced) (S).”, then press key “Next

step”, a dialog box shown as Fig. 4 will display;

Fig. 4 Dialog box

c) Select option “Do not search, I want to select drive program to be installed by myself (D).”,

press key “Next step”, a dialog box shown as Fig. 5 will display;

Fig. 5 Dialog box

d) A dialog box shown as Fig. 6 will display, select option “Set up from disk.”;

Fig. 6 Dialog box

e) Select directory of drive program and press file “MLTCA200.INF” to begin setup, if prompt

“Whether go on… ” appears during setup process, ignore it and keep on settiup, please refer to

dialog box show as Fig. 7;

Fig. 7 Dialog box

f) Drive program “CA210 SDK” must be set up after above installation completed, a dialog box shown

as Fig. 8 will display;

Fig. 8 Dialog box

g) Program “ISScript8.msi” must be set up at the same time, press key “Next” to begin setup after a

dialog box shown as Fig. 9 display;

Fig. 9 Dialog box

4.4.2.2 Set up drive program for interfaces of PC and TV

Refer connective line to Fig. 11:

Fig. 10 Connective line

Press file “Setup.exe” in the directory of setup programs, an interface shown as Fig. 11 display

and then press key “Next” to complete setup;

Fig. 11 Setup dialog box

4.4.2.3 Communication setup for VG848 RS232

a) Physical communication protocol setup for VG848:

Baud rate：9600bps

Data bits: 8 bits

Parity: None

Stop bit: 1 bit

Detailed setup procedures as follows:

(1) Press the [FUNC] key, [5] key and [SET] key.

Select Function : 5 (0-E)

Config Edit

（2）Refer RS232 communication setup to Fig. 12

Fig. 12 RS232 communication setup

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