Sanyo LCD-19E30 User manual

FILE NO
SERVICE MANUAL
LCD TV
LCD-19E30
PRODUCT CODE No.: 1 682 347 60
CHASSIS NO. : SSA19CT-00
LCD-26E30
PRODUCT CODE No.: 1 682 347 61
CHASSIS NO. : SSA26CT-00
LCD-32E30
PRODUCT CODE No.: 1 682 347 62
CHASSIS NO. : SSA32CT-00
LCD-42E30
PRODUCT CODE No.: 1 682 347 63
CHASSIS NO. : SSA42CG-10
LCD-42E30F
PRODUCT CODE No.: 1 682 347 64
CHASSIS NO. : SSA42CG-00
REFERENCE No.:SM0945001-01

CONTENTS
1. Safety precautions .................................................................................................1
2. Alignment instructions and method of software upgrading.....................................5
3. Working principle analysis of the unit ................................................................... 17
4. Block diagram ......................................................................................................18
5. IC block diagram..................................................................................................21
6. Wiring diagram ...................................................................................................24
7. Troubleshooting guide..........................................................................................27
8. Schematic diagram ..............................................................................................31
APPENDIX-A: Assembly list
APPENDIX-B: Exploded View
Removing or Installing the Stand
Wall mounting instructions

3
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
high voltage . 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 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.

4
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
5 ~+ 35
o
C
Scope for storage 0~
+ 40o C
Humidity Scope for operation 0% ~ 90 %
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.
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.

5
Alignment instructions
1. Test equipment
VG-848 (YPbPr,VGA signal generator)
VG-849 (HDMI signal generator)
FLUKE 54200(TV signal generator)
CA210 (white balancer)
2. Power test
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
For42”/32”/26”
P802 Pin1,2 Pin3,4 Pin5,6,7 Pin8,9 Pin10,11,12 Pin13 Pin14 Pin15 Pin16
Voltage GND 22.8-25.2V GND 11.4-12.6V 4.75-5.25V
On:2V-5.5V
Off: 0-0.5V <0.6V 2-5V 2.5-5V PWM
For 19”
P802 Pin1,2 Pin3,4 Pin5,6,7 Pin8,9 Pin10,11,12 Pin13 Pin14 Pin15 Pin16
Voltage GND 11.4-12.6V GND 11.4-12.6V 4.75-5.25V
On:2V-5.5V
Off: 0-0.5V <0.6V 2.5-5V 2.5-5V PWM
b) Test the pin voltage of P803/power board, the data is shown in table2:
Table2 voltage data of P803
For42”/32”/26 only
P803 Pin1,2,3,4,5 Pin6,7,8,9,10 Pin11 Pin12 Pin13 Pin14
Voltage 22.8-25.2V GND NC 2.5V-5V 2.5-5V PWM NC

6
3. Alignment flow-chart
The alignment flow-chart is shown as fig-1
Check if DDC, HDCP KEY, FLASH are written
Combined test for general assembly
White balance adjustment
Connect to the center signal source and check each
Function of TV (station leaking, analog control, etc.)
Check the output of earphone and speaker.
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

7
4. Adjustment instruction
At any input source then press the “Mute” (remote control) and “Menu (key pad) 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 signal generator to TV input sources Video3; ASTRO-859 signal setting to1080i
(PG2 mode Timing 933 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 enter the item.
Board Name: L19112_Rev.1
VERSION: SSA19C-WXGA V1.0
04/10/09 00:00:00
FACTORY MENU
Cool
Warm
Normal
Shipping
NV Clear
Full Power
A
uto Calibration
RF Burn In
Service Mode
Reset
OK
OK
OK
< Factory >
OK
OK
>
< Off >
< Off >
OK
Board Name: L19112_Rev.1
VERSION: SSA19C-WXGA V1.0
04/10/09 00:00:00
FACTORY MENU
Cool
Warm
Normal
Shipping
NV Clear
Full Power
A
uto Calibration
RF Burn In
Service Mode
Reset
OK
OK
OK
< Factory >
OK
OK
OK
< Off >
< Off >
OK
-> Source calibration performed automatically when finished that will show OK.

8
Repeat step 2 to do VGA input sources,
ASTRO-859 signal setting to1024X768 60Hz (PG1 mode: Timing 856 and Pattern 914:5 White Block.)
Repeat step 2 to do TV input sources of Video1 (Composite-AV):
Fluke 54200 TV SIGNAL GENERATOR: Signal setting to PAL System and Pattern: CHECKER.
4-2. Color Temperature Adjustment & Check
4-2.1. Set the signal generator to RGB, 1024*768, 60HZ (ASTRO-859: PG1 856), Level: 0.56V (80%).
Full white pattern.
4-2.2. Press up or down key of remote control to select “Cool”, Press 䇸OK䇹key to enter the item.
R, G, B drive values are set for COOL, Medium, and WARM independently.
4-2.3. Select 䇸Cool䇹
Cool spec.:26”/32”/42”
x= 0.267±0.010
y= 0.271±0.010
Cool spec.:19”
x=0.281±0.010
y=0.288±0.010
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

9
4-2.4. Select [Normal]
Normal spec.: 26”/32”/42”
x=0.281±0.010
y=0.288±0.010
Normal spec.: 19”
x=0.300±0.010
y=0.310±0.010
Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.
4-2.5. Select [Warm]
WARM spec.: 26”/32”/42”
x=0.301±0.010
y=0.310±0.010
WARM spec.: 19”
x=0.314±0.010
y=0.323±0.010
Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.
4-2.6 Exit Factory Mode:
After finish 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 Cool ->Warm -> Normal ->Shipping-> NV clear-> Full
Power -> Auto Calibration -> RF Burn In -> Reset.
The NV Clear and Reset to Default items will have a check dialog “yes or 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 bottom
Board Name: L19112_Rev.1
VERSION: SSA19C-WXGA V1.0
04/10/09 00:00:00
FACTORY MENU
Cool
Warm
Normal
Shipping
NV Clear
Full Power
A
uto Calibration
RF Burn In
Service Mode
Reset
OK
OK
OK
< Factory >
OK
OK
>
< Off >
< Off >
OK

10
5-1) 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
5-2) 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
5-3) Normal
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) Shipping
Press up or down key can select high light item function.
Press “Left” & “Right” key to select the item. Default set in Factory mode.
Following shipping area to select the item (Factory/Asia/China/S America).
5-5) NV 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: Gamma table, Channel table (Favorite channel, Channel label etc.), Model 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 “yes or no”
to do the initial or not.
NOTICE:
This item just enabled in PC input and after this item is processed then 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 enter key to turn on Full Power and OSD stay display until press enter key to recover from Full Power.

11
5-7) Auto 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) 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 “ANT”, Input Configuration is “Antenna” and channel is NTSC channel 2.
5-9) Service Mode
Press “Left” & “Right” key to select the item. Default set in “On”.
When use the RS-232 serial port to control LCD TV set to “On”.
When use the F/W update function set to “Off”.
5-10) Reset
Reset all settings of OSD menu to default value.
- Reset settings: Channel table, Model table (H/V Position, Clock, Phase), Source dependent setting
(Contrast, Brightness etc.), Common setting (Volume, Language etc.)

12
6. Dealer Mode Function

13
7. Performance check
7-1 TV function
Connect RF to the center signal source, enter Channel menu ĺauto tuning, 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 YUV 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 YUV signal format
7-4 VGA terminal
Input VGA 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->Setup->Auto Adjust to perform auto-
correct.
Table5 VGA signal format

14
7-5 HDMI terminal
Input HDMI signal (VG849 signal generator), separately input the signals listed in table4 and table5 and check the
display and sound (32KHz, 44.1KHz, 48KHz) at any situation (power on, channel switch and format convert, etc.)
7-6 other functions check
a) Check the turn on/turn off timer, sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext, etc.
8. Software instruction
(1) M-Star Debug board X1, USB cable X1, PC D-Sub cable X1
Follow below connecter function with PC and LCD TV.
(2)
Turn on LCD TV then press the “Mute” (remote control) and “Menu” (key pad) to enter factory mode.
Setup Service Mode form “ON” to "Off".
Board Name: L19112_Rev.1
VERSION: SSA19C-WXGA V1.0
04/10/09 00:00:00
FACTORY MENU
Cool
Warm
Normal
Shipping
NV Clear
Full Power
A
uto Calibration
RF Burn In
Service Mode
Reset
OK
OK
OK
< Factory >
OK
OK
>
< Off >
< Off >
OK

15
(3) Execute ISP_Tool.exe file and press “Connect” button.
Fig3 the written file
(4) Press Read file to loading the F/W. ex:SSAXXC.bin
(5) Click “Auto”, and press “Run” button to upgrade F/W

16
(6) If the process of writing succeeds, it will display “Pass” near “Run”..
(7) Repeat step 2) and 5) to write the program to the other units without exit the ISP interface.

17
Working principle analysis of the unit
1. PAL/SECAM signal flow:
Antenna reception PAL/NTSC/SECAM signal will be send to tuner TAFT-Z711D,
then Tuner
will be
demodulating and output standard video signal TV-CVBS and sound IF signal (SIF).
TV-CVBS will send to the master control IC MST9A881 or MST9B881 to video decode, de-interlace
and scaler, then output LVDS level drive for panel display.
The sound IF (SIF) will be fed into MST9A881 or MST9B881, after demodulating, pre-amplifying,
bass adjusting and volume control, the sound signal will
be transform into digital I2S
signal by
scaler IC and sent to digital amplifier TAS5706 amplifying, then output two ways. One
way will be sent to earphone amplifier TPA6111, another will be sent to speaker.
2. AV/SV signal flow
SV signal and the Video1 path AV signal switch
by menu “Setup”->“AV Connecting”->”Video1
input”
via terminal socket, the signal and the Video2 path AV signal will be fed to MST9A881 or
MST9B881 to perform video decode, de-interlace and scaler, then output LVDS drive level for panel
display.
Audio signal from AV/SV
terminal via matched resistance is fed to MST9A881 or MST9B881 to bass
adjust and volume control, the sound signal will be
transform into digital I2S signal by scaler IC and
sent to digital amplifier TAS5706 amplifying, then output two ways. One way will be sent to earphone
amplifier TPA6111, another will be sent to speaker.
3. PC/YPrPb signal flow
PC and the Video3 path YPbPr signal are via terminal sent to MST9A881 or MST9B881 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
terminal via matched resistance and sent to MST9A881 or
MST9B881 to bass adjust and volume control, the sound signal will be transform into digital I2S signal
by scaler IC and sent to digital amplifier TAS5706 amplifying, then output two ways. One way will be
sent to earphone amplifier TPA6111, another will be sent to speaker.
4. HDMI signal flow
Three HDMI video signals via switcher Sil9185 are directly fed to the master control IC MST9A881
or MST9B881(19” directly into master control IC MST9A881) to digital decode, image scale, then
output LVDS drive level for panel display. HDMI audio signal via decoder built-in MST9A881 or
MST9B881 is fed to back end to bass adjust and volume control, the sound signal will
be transform
into digital I2S signal by scaler IC and sent to digital amplifier TAS5706 amplifying, then output two
ways. One way will be sent to earphone amplifier TPA6111, another will be sent to speaker.

18
Block diagram-ELECTRON-19”26”32”42”

19
Block diagram-POWER-19”

20
Block diagram-POWER-26”32”42”
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