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4 Alignments and Adjustments
4 Alignments and Adjustments
4-1 General Alignment Instuction
1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation.
Check the basic characteristics such as height, horizontal and vertical sync.
2. Use the specified test equipment or its equivalent.
3. Correct impedance matching is essential.
4. Avoid overload. Excessive signal from a sweep generator might overload the front-end
of the TV. When inserting signal markers, do not allow the marker generator to distort
test result.
5. Connect the TV only to an AC power source with voltage and frequency as specified on
the backcover nameplate.
6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure
that the power cord is disconnected before replacing any parts.
7. To protect aganist shock hazard, use an isolation transform.
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4 Alignments and Adjustments
4-2 Factory Mode Adjustments
4-2-1 Entering Factory Mode
1. To enter "Service Mode" Press the remote -control keys in this sequence :
- If you do not have Factory remote - control
I FO
N MENU MU TE
- If you have Factory remote - control
- The buttons are active in the service mode.
1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left
Arrow Right, Menu, Enter, Number Key(0~9)
2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -,
Menu, TV/VIDEO(Enter)
4-2-2 Factory Mode Tree
* Please set up for an appropriate INCH.
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4-3-1 White Balance - Calibration
4-3-2 White Balance - Adjustment
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4-3-3 Conditions for Measurement
1. On the basis of toshiba ABL pattern : High Light level (57 IRE)
- INPUT SIGNAL GENERATOR : MSPG-925LTH
* Mode NO 1 : 744X484@60 Hz
NO 6 : 1280X720@60 Hz
NO 21 : 1024X768@60 Hz
* Pattern NO 36 : 16 Color Pattern
NO 16 : Toshiba ABL Pattern
2. Optical measuring device : CA210 (FL)
Please use the MSPG-925 LTH generator for model LT26A33W.
4-3-4 Method of Adjustment
1. Adjust the basic level of DTV and PC input signals.
a) Set the input to the mode in which the adjustment will be made (DTV PC ).
* Input signal - DTV Mode : Model #6 (1280*720 Mode), Pattern #36
- PC Mode : Model #21 (1024*768 Mode), Pattern #16 (Picture 4-1)
b) Enter factory Calibration, confirm the ADC data (DTV, PC Mode Only).
* ADC default value : Table 4-3.
Picture 4-1 Toshiba ABL Pattern
2. Adjust the white balance of RF, DTV, PC and DVI Modes.
a) Set the input to the mode in which the adjustment will be made(RF DTV PC DVI).
* Input signal - VIDEO Mode : Model #1 (744*484 Mode), Pattern #16
- DTV,DVI Mode : Model #6 (1280*720 Mode), Pattern #16
- PC Mode : Model #21 (1024*768 Mode), Pattern #16
b) Enter factory color control, confirm the data.
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4 Alignments and Adjustments
c) Adjust the low light. (Refer to table 1, 2 in adjustment position by mode)
- Adjust sub - Brightness to set the 'Y' value.
- Adjust red offset ('x') and blue offset ('y') to the color coordinates.
* Do not adjust green offset data.
Picture 4-2 Toshiba ABL Pattern
Low light
Measurement point
d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)
- Adjust red gain ('x') and blue gain ('y') to the color coordinates.
* Do not adjust the green gain and sub-contrast (Y) data.
Picture 4-3 Toshiba ABL Pattern
High light
Measurement point
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4-4 Flash ROM Update
1. Installthe Flash Downloader
ConnectSet(Service Jack)and Jig Cable to execute Program Update.
2. Flash Downloader program update
-Before Turning on the set,Click "connect"which is under of OSD Screen!
-Turn on the Set.
3.Open the New Update File and Click the Program and Verify.
4.Program update sledding ismarked sequently on OSD screen.
5.Afterprogram update completion,message should be pop up.
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