ORDER NO.MTNC120449CE
B01 Canada: B61
LCD TV
Model No. TC-L32C5
TC-32LC54
TC-L32C5X
TC-L3252C
©Panasonic Corporation 2012. Unauthorized copying and distribution is a violation of law.
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CONTENTS |
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1. |
Safety precautions ................................................................................................. |
3 |
2. |
Alignment instructions and method of software upgrading..................................... |
5 |
3. Working principle analysis of the unit ................................................................... |
14 |
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4. |
Block diagram ...................................................................................................... |
15 |
5. |
IC block diagram.................................................................................................. |
16 |
6. Wiring diagram ................................................................................................... |
28 |
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7. Troubleshooting guide.......................................................................................... |
30 |
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8. |
Exploded View ..................................................................................................... |
34 |
9. |
Replacement Parts List........................................................................................ |
36 |
10. Boards Layout.................................................................................................... |
39 |
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2
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
2.1Screens are different from one model to another and therefore not interchangeable. Be sure to Use the screen of the original model for replacement.
2.2The 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.
2.3Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or damage to the set.
2.4Never 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.
2.5If 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.
2.6Should 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.
2.7Do 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.
2.8When operating or installing LCD please don’t subject the LCD components to bending, twisting or extrusion, collision lest mishap should result.
2.9As 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.
2.10There 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.
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2.11Special 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.
2.12For 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 ~ + 40 oC |
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Scope for storage |
-20 ~ + 60oC |
Humidity |
Scope for operation |
20% ~ 90 % |
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Scope for storage |
5% ~ 90% |
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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
3.1The front panel of LCD screen is of glass. When installing it please make sure to put it in place.
3.2For service or installation it’s necessary to use specified screw lest it should damage the screen.
3.3Be 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
3.4When 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.
3.5Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.
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2. Alignment instructions
(1)Test equipment
VG-859 (YPbPr, VGA, 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
For 32”
P802 |
Pin1,2 |
Pin3,4 |
Pin5,6,7 |
Pin8,9 |
Pin10,11 |
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Voltage |
GND |
11.4V~12.6V |
GND |
11.4V~12.6V |
4.75V~5.25V |
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For 32”
Pin12 |
Pin13 |
Pin 14 |
Pin15 |
Pin16 |
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On:2.5V-5.25V |
Normal:0V~0.5V |
On:2.5V-5.25V |
Duty 20%~100% |
NC |
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Off: 0-0.5V |
Abnormal :Open drain |
Off: 0-0.5V |
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(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 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 USB 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
6
(4) Adjustment instruction
At any input source then press the “←”, “EXIT” and “OK” (Remote control within 1 sec) to enter factory mode During Factory menu, if “MENU” key is pushed, system will exit factory mode.
4-1. Source Calibration
4-1.1. Set the signal generator to input sources Component on LCD-TV; ASTRO-859 signal setting to NTSC-M (PG2 mode Timing 924 and Pattern 984 SMPTE Color Bar.)
4-1.2. Entering into factory Mode: Press up or down key of remote control to select “Source Calibration”, PressOK key to enter the item.
-> Source calibration performed automatically when finished that will show OK. Repeat step 2 to do VGA input sources,
ASTRO-859 signal setting to1024X768 60Hz. (PG2 mode: Timing 963 and Pattern 942 16step H-grayscale + white border.)
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4-2. Color Temperature Adjustment & Check
4-2.1. Set the signal generator to RGB, 1024*768, 60HZ(ASTRO-859: PG1 856), Level: 77(30%) or 178(70%). Full white pattern. (RGB gain and offset all should not over 128,and one of RGB gain and offset have to be setting on 110. )
4-2.2. Press up or down key of remote control to select “Cool”, Press ENTER key to enter the item.
RGAIN, GGAIN, BGAIN, ROFFSET, GOFFSET, BOFFSET, drive values are set for Warm, Normal, and Cool independently.
4-2.3. Select Warm
Step 1.First Turning Gain parts of RGB.
(1) Warm spec.:
x= 0.318±0.005 y= 0.331±0.005
(2) If the x and y value are larger than specification,
Decrease R GAIN drive from default value. Increase B GAIN drive from default value.
(3)If the x or y or both x and y value is/are smaller than specification. Decrease B GAIN drive from default value
(4)According to a x and y value, please following adjustment of (4)-1 or (4)-2.
(4)-1 If x value is higher than spec
Decrease R GAIN drive from default value. Increase B GAIN drive from default value.
(4)-2 If y value is higher than spec,
Decrease B GAIN drive from default value Step 2.When finish Gain parts, then turning OFFSET parts
Select Normal
(1)Medium spec.: (Same as the Gain session) x= 0.289±0.005
y= 0.306±0.005
(2)If the x and y value are larger than specification, Decrease R OFFSET drive from default value. Increase B OFFSET drive from default value.
(3)If the x or y or both x and y value is/are smaller than specification.
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Decrease B OFFSET drive from default value
(4) According to a x and y value, please following adjustment of (4)-1 or (4)-2.
(4)-1 If x value is higher than spec
Decrease R OFFSET drive from default value. Increase B OFFSET drive from default value.
(4)-2 If y value is higher than spec,
Decrease B OFFSET drive from default value
Step 3.When finishing OFFSET parts, then recheck Gain parts .unitl Both of them meet the target specification
Step 3. Than select Cool using same way to adjust the setting.
4-2.4. Exit Factory Mode:
After finish adjusting color temperature press [MENU] to exit factory mode.
(5) Items of Factory menu
When in PC/ Component/ Video (Composite)/ ANT inputs then press the “Left -> Exit -> Enter” key of remote control to enter factory mode..
During Factory menu, if “MENU” or “EXIT” key is pushed, system will exit factory mode.
Press up and down key can move high light item from Color Temperature -> Timer Clear -> Preset Channel- >NVRAM Clear-> Full Power -> Source Calibration -> Reset to Default -> RF Burn In -> USB F/W Upgrade -> UART Enable-> Bypass Gamma.
The Timer Clear, NVRAM 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 panel Burn in Time on the bottom.
Display model name, firmware version and released date on top.
1)Factory Color Temp data edit
Press up or down key can select high light item function Press enter key to enter the item.
-Color temp default preset No (Warm, Medium, Cool). -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
2) Timer Clear
Reset the timer which records hours of LCD panel burn in This item will have a check dialog “yes or no” to do or not.
- Time in factory mode: Time function shall be displayed automatically. Saving the total time of system
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power on (LCD turn on), and count the time automatically. The timer is continuous and saved (per 10 minutes) forever, unless it will be reset by doing “Timer Clear”.
3) Preset channel
Load preset channel for production line. (Refer 4.4.4 Preset channel table). 4) NVRAM 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:
After this item is processed then the DUT needs to be powered off then AC powered off.
5)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
6) Source Calibration
Source Calibration (gain/offset) must be adjusted color by firmware automatic adjustment in PC, Composite and Component input source.
This item will have a result dialog “OK” or “NG”. 7) Reset to Default
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.), Parental Control (Rating, Password etc), Closed Caption.
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/Cable" and channel is NTSC channel 3.
9) USB F/W Upgrade
Upgrade firmware through USB. 10) UART Enable
Enable to communicate with Auto-Alignment system. 11) Bypass Gamma
For factory test value of gamma.
(6) Performance check
6-1 TV function
Connect RF to the center signal source, enter Channel menu → auto tuning, check if there are channels be skipped, check if the picture and speaker are normal.
6-2 AV terminals
Input Video signal, check if the picture and sound are normal.
6-3 YPbPr terminal
Input YUV signal (VG859 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
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FREQ |
PERIOD |
SYNC |
PIXEL |
Display |
SYNC |
BACK |
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POLARITY |
CLOCK |
WIDTH |
PORCH |
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MODE |
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LINE(kHz) |
LINE (pixel) |
LINE |
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LINE (pixel) |
LINE (pixel) |
LINE (pixel) |
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FRAME |
FIELD |
(MHz) |
FRAME |
FRAME |
FRAME |
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FIELD |
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(Hz) |
(lines) |
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(lines) |
(lines) |
(lines) |
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15.734 |
1716 |
Negitive |
27 |
1440 |
124 |
114 |
59.94Hz 720x480i |
59.94 |
525 |
Negitive |
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480 |
3 |
15 |
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31,469 |
858 |
Negitive |
27 |
720 |
62 |
60 |
59.94Hz 720x480P |
59.94 |
525 |
Negitive |
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480 |
6 |
30 |
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45 |
1650 |
Positive |
74.25 |
1280 |
40 |
220 |
60Hz 1280x720P |
60 |
750 |
Positive |
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720 |
5 |
20 |
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33.75 |
2200 |
Positive |
74.25 |
1920 |
44 |
148 |
60Hz 1920X1080i |
60 |
1125 |
Positive |
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1080 |
5 |
15 |
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67.5 |
2200 |
Positive |
148.5 |
1920 |
44 |
148 |
60Hz 1920X1080P |
60 |
1125 |
Positive |
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1080 |
5 |
36 |
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6-4 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
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FREQ |
PERIOD |
SYNC |
PIXEL |
Display |
SYNC |
BACK |
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POLARITY |
CLOCK |
WIDTH |
PORCH |
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Mode |
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LINE(kHz) |
LINE (pixel) |
LINE |
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LINE (pixel) |
LINE (pixel) |
LINE (pixel) |
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(MHz) |
FRAME |
FRAME |
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FRAME(Hz) |
FIELD(lines) |
FIELD |
FRAME(lines) |
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(lines) |
(lines) |
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VGA 60Hz |
31.469 |
800 |
Negative |
25.175 |
640 |
96 |
40 |
640x480 |
59.941 |
525 |
Negative |
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480 |
2 |
25 |
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SVGA 60Hz |
37.879 |
1056 |
Positive |
40 |
800 |
128 |
88 |
800x600 |
60.317 |
628 |
Positive |
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600 |
4 |
23 |
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XGA 60Hz |
48.363 |
1344 |
Negative |
65 |
1024 |
136 |
160 |
1024x768 |
60.004 |
806 |
Negative |
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768 |
6 |
29 |
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WXGA 60Hz |
47.776 |
1664 |
Negative |
79.5 |
1280 |
128 |
192 |
1280x768 |
59.87 |
798 |
Positive |
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768 |
7 |
20 |
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WXGA 60Hz |
47.712 |
1792 |
Positive |
85.5 |
1360 |
112 |
256 |
1360x768 |
60.015 |
795 |
Positive |
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768 |
6 |
18 |
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6-5 HDMI terminal
Input HDMI signal (VG859 signal generator), separately input the signals listed in table6 and check the display and sound (32 KHz, 44.1 KHz, 48 KHz) at any situation (power on, channel switch and format convert, etc.)
Table6 HDMI signal format
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FREQ |
FREQ |
PERIOD |
SYNC |
PIXEL |
Display |
SYNC |
BACK |
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POLARITY |
CLOCK |
WIDTH |
PORCH |
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LINE(kHz) |
LINE (pixel) |
LINE |
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LINE (pixel) |
LINE (pixel) |
LINE (pixel) |
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MODE |
(MHz) |
FRAME |
FRAME |
FRAME |
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FRAME(Hz) |
FIELD(lines) |
FIELD |
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(lines) |
(lines) |
(lines) |
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VGA 60Hz |
31.469 |
800 |
Negitive |
25.175 |
640 |
96 |
40 |
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640x480 |
59.94 |
525 |
Negitive |
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480 |
2 |
25 |
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SVGA 60Hz |
37.879 |
1056 |
Positive |
40 |
800 |
128 |
88 |
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800x600 |
60.317 |
628 |
Positive |
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600 |
4 |
23 |
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XGA 60Hz |
48.363 |
1344 |
Negitive |
65 |
1024 |
136 |
160 |
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1024x768 |
60.004 |
806 |
Negitive |
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768 |
6 |
29 |
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WXGA 60Hz |
47.776 |
1664 |
Negitive |
79.5 |
1280 |
128 |
192 |
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1280x768 |
59.87 |
798 |
Positive |
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768 |
7 |
20 |
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WXGA 60Hz |
47.712 |
1792 |
Positive |
85.5 |
1360 |
112 |
256 |
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1360x768 |
60.015 |
795 |
Positive |
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768 |
6 |
18 |
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59.94Hz 720x480i |
15.734 |
1716 |
Negitive |
27 |
1440 |
124 |
114 |
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59.94 |
525 |
Negitive |
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480 |
3 |
15 |
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59.94Hz 720x480P |
31.469 |
858 |
Negitive |
27 |
720 |
62 |
60 |
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59.94 |
525 |
Negitive |
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480 |
6 |
30 |
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60Hz 1280x720P |
45 |
1650 |
Positive |
74.25 |
1280 |
40 |
220 |
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60 |
750 |
Positive |
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720 |
5 |
20 |
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60Hz 1920X1080i |
33.75 |
2200 |
Positive |
74.25 |
1920 |
44 |
148 |
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60 |
1125 |
Positive |
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1080 |
5 |
15 |
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60Hz 1920X1080P |
67.5 |
2200 |
Positive |
148.5 |
1920 |
44 |
148 |
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60 |
1125 |
Positive |
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1080 |
5 |
36 |
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24Hz 1920x1080P |
27 |
2750 |
Positive |
74.25 |
1920 |
44 |
148 |
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24 |
1125 |
Positive |
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1080 |
5 |
36 |
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6-6 other functions check
a)Check the turn on/turn off timer, sleep timer, picture/sound mode, OSD, stereo and analog TV Teletext, etc.
(7)Firmware update process
(1)Plug the USB with the firmware file named SPC32TM.ecc
(2)If system detect SPC32TM.ecc, USB upgrade message would appear automatically.
(3) Press Left key to select Yes, and then press OK key to start the upgrading.
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