Sanyo LCE-32R77 Schematic

FILE NO.

SERVICE MANUAL

LED-LCD TV

LCE-32R77

PRODUCT CODE No.

PRODUCT CODE No. 1 682 351 96: PAL/SECAM

-B/G, D/K, I

NTSC(AV)

INPUT

FREEZE

SLEEP

DISPLAY

ENTER

EXIT

MUTE

VOL CH

FAVORITE

TTX

FUNCTION

ZOOM

MIX

AUTO/STEREO

INDEX

PICTURE

SUBTITLE

SOUND

TEXT/USB

RC-1310-0A

REFERENCE No.:SM0915230

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 Instructions

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.

1.4 Power supply voltage must be ~(100-240) V±10% 50 Hz.

2 Adjustment Equipments

VG-848 (YPbPr, VGA signal generator) VG-848 (HDMI signal generator) CA-210

3 Adjustment Processes

3.1 Power voltage test

According to the wiring diagram ‘9232ME7001JL’, connect power board assembly, data processing assembly, IR/Key board assembly correctly, supply with power, press button standby to turn on the TV set.

3.11 Model LC-32MEXX

Test voltage of X301 each pin on power board in turn shown as Table 1:

Table 1 Voltage of X301 each pin

X301

Min. (V) 0 11.3 0 4.85 4.85 4.85 3.25 4.85

Typical(V) 0 12.0 0 5.00 5.00 5.00 3.30 5.00

Max. (V) 0 12.6 0 5.35 5.35 5.35 3.35 5.07

Pin 1

2、3 4、5

6 7 8 9 10

3.12 Model LE-32/42MEXX and LC-39/46/50MEXX

Test voltage of X301 each pin on power board in turn shown as Table 2:

Table 2 Voltage of X301 each pin

Pin 1、2 3、4 5、6 7、8

X301

Min. (V) 11.3 0 11.3 0 4.85 4.85 4.85 3.25 4.85

Typical(V) 12.0 0 12.0 0 5.00 5.00 5.00 3.30 5.00

Max. (V) 12.6 0 12.6 0 5.35 5.35 5.35 3.35 5.07

9 10 11 12 13

3.13 Model LE-46/55MEXX

Test voltage of X301 each pin on power board in turn shown as Table 3:

X301

最小(V)

典型(V)

最大(V)

Pin 1、2 3、4 5、6 7、8

24.3 0 11.3 0 4.85 4.85 4.85 3.25 4.85

24.0 0 12.0 0 5.00 5.00 5.00 3.30 5.00

23.6 0 12.6 0 5.35 5.35 5.35 3.35 5.07

3.2 Adjustment flow as Fig. 1:

Input central signal, check TV function (omitted channel, analog

parameters control, etc. ), check earphone, speakers output.

Table 3 Voltage of X301 each pin

9 10 11 12 13

Check if DDC、FLASH has been written?

Produce data processing board on line.

General assembly and combined adjustment

White balance adjustment

Input AV signal, check relevant functions.

Input HDMI signal (mode), check YPbPr functions.

Input VGA signal, check display and all functions

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

Input HDMI signal, check display and all functions

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

Input USB signal, check relevant functions.

Default settings before shipment

Check accessory and packing

Fig. 1 Adjustment flow chart

4 Adjustment Instructions

4.1 The unit adjustments

4.1.1 According to the wiring diagram “9232ME7001JL”, 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”, 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 “ENTER” 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 of factory menu sequentially; f) Press key “EXIT” to exit factory menu in any case; g) Factory menu item: Aging Mode to be used for aging the TV set when the option is “On”;

press any key on key board to exit aging mode during the aging process; h) Factory menu item: Othersetting → Power on mode:

‘On’: to turn on the TV set with one step;

‘Off’: to turn on the TV set with two steps;

‘Memory’: to keep the last power-off state when power on the TV set again;

4.2 White balance adjustment

4.2.1 Before adjustment 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) VGA channel adjustment

Input square signal (VG848 Timing: 854 (VESA 800

×600/60 Hz), enter into user menu

Setup→VGA Setting→ AUTO to make picture display fully; then input signal (VG848 PAT: 914),

enter into factory menu page ADC ADJUST to perform AUTO ADC until the prompt “SUCCESS” displays.

b) YPbPr channel adjustment

Input signal (VG848 Timing: 968 (480i/60 Hz)，PAT: 918 (100% color bar + gray scale)) , enter into factory menu page ADC ADJUST to perform AUTO ADC until the prompt “SUCCESS” displays.

c) Only Normal color temperature need adjusting for the model. Chromatic coordinates of bright scale must be set as (△X=±5, △Y=±5), chromatic coordinates of dark scale must be set as (△X=±10, △Y=±10). Chromatic coordinates of each model are listed as Table 4:

Table 4 Chromatic coordinates of each model

WARM NORMAL COOL

6500K（313、329） 9300K（285、293） 12000K（272、278）

d）BBY：Insignia-Dynex TV Spec Part of chromatic coordinates are listed as Fig. 2:

Fig.2 Chromatic coordinates of white balance

4.2.2 Four groups of white balance adjustments

4.2.2.1 DVI channel adjustment (HDMI,USB channel with the same adjustment method of this one)

Input signal (VG848 Timing: 854，PAT: 921 (16-gray-step)), enter into factory menu page Color

Temp, fix item G-GAIN, adjust items R-GAIN、B-GAIN to set chromatic coordinates of the reversed

scale as the date of NORMAL; fix item G-OFFSET, adjust items R-OFFSET、B-OFFSET to set

chromatic coordinates of the 4

scale as the date of NORMAL; adjust items R-GAIN、B-GAIN and

R-OFFSET、B-OFFSET repeatedly as above until chromatic coordinates of both gray scales are the

date of NORMAL;

Check if chromatic coordinates of WARM is (313、329), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

Check if chromatic coordinates of COOL is (272、278), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

4.2.2.2 VGA channel adjustment

Input signal (VG848 Timing: 854，PAT: 921 (16-gray-step)), enter into factory menu page Color

Temp, fix item G-GAIN, adjust items R-GAIN、B-GAIN to set chromatic coordinates of the reversed

scale as the date of NORMAL; fix item G-OFFSET, adjust items R-OFFSET、B-OFFSET to set

chromatic coordinates of the 4

scale as the date of NORMAL; adjust items R-GAIN、B-GAIN and

R-OFFSET、B-OFFSET repeatedly as above until chromatic coordinates of both gray scales are the

date of NORMAL;

Check if chromatic coordinates of WARM is (313、329), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

Check if chromatic coordinates of COOL is (272、278), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

4.2.2.3 YPbPr channel adjustment

Input signal (VG848 Timing: 968，PAT: 921 (16-gray-step)), enter into factory menu page Color

Temp, fix item G-GAIN, adjust items R-GAIN、B-GAIN to set chromatic coordinates of the reversed

scale as the date of NORMAL; fix item G-OFFSET, adjust items R-OFFSET、B-OFFSET to set

chromatic coordinates of the 4

scale as the date of NORMAL; adjust items R-GAIN、B-GAIN and

R-OFFSET、B-OFFSET repeatedly as above until chromatic coordinates of both gray scales are the

date of NORMAL;

Check if chromatic coordinates of WARM is (313、329), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

Check if chromatic coordinates of COOL is (272、278), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

4.2.2.4 AV channel adjustment（TV channel with the same adjustment method of this one）

Input signal (VG848 Timing: 969，PAT: 921 (16-gray-step)), enter into factory menu page Color

Temp, fix item G-GAIN, adjust items R-GAIN、B-GAIN to set chromatic coordinates of the reversed

scale as the date of NORMAL; fix item G-OFFSET, adjust items R-OFFSET、B-OFFSET to set

chromatic coordinates of the 4

scale is about 10nit; adjust items R-GAIN、B-GAIN and R-OFFSET、B-OFFSET repeatedly as

scale as the date of NORMAL and make sure the brightness of the

above until chromatic coordinates of both gray scales are the date of NORMAL;

Check if chromatic coordinates of WARM is (313、329), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

Check if chromatic coordinates of COOL is (272、278), if not, adjust items R GAIN / B GAIN / R OFF/ B OFF to be up to the requirements and then save the date.

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 any program is omitted; check the speakers output and the display.

5.2 AV port

Input AV signal, check the sound and the picture.

5.3 YPbPr/YCbCr port

Input YUV signal from VG848 with formats listed as Table 5 respectively, check the sound and the display.

Table 5 YUV received signal formats

No. Definition

1 720×480i/59.94 Hz 15.73 59.94 13.50 CEA-770.2-C 2 720×480i/60 Hz 15.75 60 13.51 CEA-770.2-C

3 720×576i/50 Hz 15.62 50 13.50 ITU-R BT.656–4 4 720×480p/59.94 Hz 31.47 59.94 27.00 CEA-770.2-C 5 720×480p/60 Hz 31.50 60 27.03 CEA-770.2-C

6 720×576p/50 Hz 31.25 50 27.00 ITU-R BT.1358 7 1280×720p/50 Hz 37.50 50 74.25 SMPTE 296M 8 1280×720p/59.94 Hz 44.95 59.94 74.18 CEA-770.3-D

9 1280×720p/60 Hz 45.00 60.00 74.25 CEA-770.3-D 10 1920×1080i/50 Hz 28.12 50 74.25 SMPTE 274M 11 1920×1080i/59.94 Hz 33.72 59.94 74.18 CEA-770.3-C

12 1920×1080i/60 Hz 33.75 60.00 74.25 CEA-770.3-C 13 1920×1080p/50 Hz 56.25 50 148.50 14 1920×1080p/59.94 Hz 67.43 59.94 148.35

15 1920×1080p/60 Hz 67.50 60.00 148.50

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse Freq.

(MHz)

Note

5.4 VGA port Input VGA signal from VG848 with formats listed as Table 6 respectively, check the sound and

the display. If H./V. of picture displays abnormally, enter into user menu Setup→VGA Setting→ AUTO to perform calibration automatically to display the picture fully.

Table 6 VGA received signal formats

No. Definition

1 720×400@70 Hz 31.47 70.08 28.32 VGA-T 2 640×480@60 Hz 31.50 60.00 25.18 VGA

3 640×480@72 Hz 37.90 72.00 31.50 VESA 4 640×480@75 Hz 37.50 75.00 31.50 VESA 5 800×600@56 Hz 35.16 56.25 36.00 VESA

6 800×600@60 Hz 37.90 60.00 40.00 VESA Guidelines 7 800×600@75 Hz 48.08 75.00 50.00 VESA 8 1024×768@60 Hz 48.40 60.00 65.00 VESA Guidelines

9 1024×768@70 Hz 56.50 70.00 75.00 VESA 10 1024×768@75 Hz 60.00 75.00 78.75 VESA 11 1280×768@75 Hz 60.30 75.00 102.25 VESA

12 1360×768@60 Hz 47.70 60.00 85.5 VESA 13 1280×1024@60 Hz 64.00 60.00 108.0 VESA (FHD panel) 14 1280×1024@75 Hz 80.00 75.00 135.0 VESA (FHD panel)

15 1920×1080@60 Hz 67.50 60.00 148.5 CEA-861(FHD panel)

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse Freq.

(MHz)

Note

5.5 HDMI port Input HDMI/DVI signal from VG849 with formats listed as Table 5&6 respectively, check the

sound and the display.

5.6 USB port Input USB signal, check the sound and the display.

6 Presetting before shipment

Enter into factory menu, select items Other Setting→SHIPMENT to perform presetting before shipment automatically. The unit only responds the command ‘shut down’ after presetting. The step of presetting before shipment must be done after factory adjustments completed. Main steps of SHIPMENT are listed as below:

1）Display guided menu of initial setup when turning on the TV set;

2）Reset default date of picture mode (TV channel picture mode: STANDARD, TV channel color temperature: NORMAL; VGA channel picture mode: STANDARD, VGA channel color temperature: COOL; other channels picture mode: COLORFUL, other channels color temperature: COOL); reset sound mode as SANDARD and the volume as 20;

3）Clear up the date of channel and favorite list;

4）Menu language: simplified Chinese for models of sale in domestic market,

English for export models

Software Upgrading Instruction

7 Software Upgrading Instructions as Table 7

Table 7 Software Upgrading Instruction

Location Part No. Part model Software functions

N102 5272532007 EN25Q32B-104HIP Main Software Yes Upgrade with ALL100, etc. N102 5272532007 EN25Q32B-104HIP HDCP KEY Yes Upgrade with ALL100, etc.

8 Software (FALSH) upgrading methods

8.1 Execute ALL-100 upgrading file GSEEP.EXE;

8.2 Click menu Device, select FLASH model EN25Q32B shown as Fig. 3; Note: real FLASH model depends on the real material, models shown by Fig. 3 are just for illustration.

Upgrading

before SMT

Upgrading method

Fig. 3 Device model selection interface

8.3 Click toolbar AUTO, enter into interface AUTO, make sure to tick off option Config when

upgrading Flash. Please refer to Fig. 4.

Fig. 4 AUTO upgrading interface

8.4 Click option Config Setting in AUTO interface, set option Protect as All Protect, and set option SRWD as Enable, then click ‘OK’ to complete write-protect setup. Make sure the above both options are reset when executing ALL-100 upgrading software again after exiting it. If there is no option SRWD, please upgrade ALL-100 upgrading software. Please refer to Fig. 5.

Fig. 5 Config Setting interface

9 HDCP KEY upgrading methods

9.1 Connect to upgrading device;

9.2 Execute file ISP_ToolV1.04.exe which interface is shown as Fig. 6;

Location address:

0x3B0000

Fig. 6 ISP tool

9.3 Click button “Open” to load encrypted KEY file;

9.4 Click button “Run” to begin KEY upgrading. upgrading information will display in the information frame after upgrading completed.

Information frame

10 Software upgrading methods

10.1 Software upgrading methods from USB port (it is advise to use the method preferentially)

a) Copy file offered by RD department to the root directory of U disk. Note that the file name must

be MERGE.bin and be kept in the root directory of U disk.

b) Insert U disk to USB port, switch to non-USB channel (such as TV, AV channel, etc.), enter

into factory menu, choose “software upgrading USB”, then click “OK” to begin upgrading;

c) Click “Confirm upgrading” with left button when upgrading confirmation menu displays. Note

that U disk must not be pulled out or the unit must not be cut off during the upgrading process.

10.2 ISP（connected by VGA）upgrading method

a) Connect the unit and PC with upgrading connected board and VGA cable.

b) Open upgrading tool ISP_Tool(V4.5.0.5), select label Device to make configuration within red

frame shown as Fig. 7;

Fig. 7 Device configuration dialog

c) Select label Config to make configuration shown as Fig. 8;

Fig. 8 Config configuration dialog

Note: I2C speed is set as about 60% commonly and should not be set too fast. If it is not easy to connect successfully, please set I2C speed slower.

d) Select label Read, open bin file whose file path can display completely in the label Auto,

e) Select label Auto, select items Read File, Erase Device (sub-item File Area of Erase Device had better be selected), Program and Exit ISP, then click button “Connect”, a dialog shown as Fig. 9 will display if connection is successful, in which device type identified by the system automatically will display and option “Flash_0” in the static frame “SpiFlash_X” will be ticked off. If device type or “Flash_0” is not identified correctly, the connection is failed, then ISP tool will repeat identification automatically until device type and “Flash_0” are identified correctly, if not, please check hardware connection.

Fig. 9 Successful connect interface

f) Click button “Run” to begin software upgrading after successful connection . Please refer to Fig. 10;

Fig. 10 Software upgrading interface

g) Successful software upgrading interface is shown as Fig. 11;

Fig. 11 Successful software upgrading interface

10.3 Software upgrading method from USB port (it is advised to use the method if the picture could not display because of wrong panel parameters)

a) Copy file offered by RD department to the root directory of U disk. Note that the file name must be MERGE.bin and be kept in the root directory of U disk.

b) Insert U disk to USB port, keep pressing any key on the key board of the unit except key “Standby” or “Input”, connect to power supply, switch on power switch of the unit, then IR indicator light begins twinkling to show the unit is during the upgrading process, unloose the key you press, the unit will reset automatically after upgrading process completed.

Note that U disk must not be pulled out or the unit must not be cut off during the upgrading process.

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