Sylvania SRT2232X service manual Cut-off Adjustment, White Balance Adjustment, Mode Input

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16. Cut-off Adjustment

Purpose: To adjust the beam current of R, G, B, and screen voltage.

Symptom of Misadjustment: White color may be reddish, greenish or bluish.

Test Point

Adj. Point

Mode

 

Input

 

 

 

 

 

 

Screen-Control

 

 

Black

---

CH o / p

RF

 

 

Raster

 

buttons

 

 

 

 

 

 

 

 

 

 

 

Tape

M. EQ.

 

 

Spec.

 

 

 

---

Pattern

See Reference

Generator

Notes below.

 

 

 

 

 

 

Figure

PATTERN GENERATOR

EXT. INPUT Fig. 2

Note: Screen Control FBT --- Main CBA

F.B.T= Fly Back Transformer

Use service remote control unit

1.Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.

2.Input the Black Raster Signal from RF Input.

3.Enter the Service mode. (See page 5-1)

4.Press "VOL p" button on the service remote con- trol unit and select "C/D" mode. (Display changes "C/D," "7F," "LANGUAGE," "ACCESS CODE," "SOUND TYPE," "VIDEO TONE," "FM MODE," "V-OUT," "VIDEO," "AV MEMO," "STABLE SOUND," "FILTER," "500," and "YUV MEMORY" cyclically when "VOL p button is pressed.) then press "1." The display will momentarily show "CUT OFF R" (R= Red). Now there should be a horizon- tal line across the center of the picture tube. If needed gradually turn the screen control on the fly- back, clockwise until the horizontal line appears. Adjust the Red Cut off by pressing the "CH o/p" buttons. Proceed to Step 5 when the Red Cut off adjustment is done.

5.Press the "2" button. The display will momentarily show "CUT OFF G" (G=Green). Adjust the Green Cut off by pressing the "CH o/p" buttons. Proceed to step 6 when the Green Cut off adjustment is done.

6.Press the "3" button. The display will momentarily show "CUT OFF B" (B=Blue). Adjust the Blue cut off by pressing the "CH o/p" buttons. When done with steps 4, 5 and 6 the horizontal line should be pure white if not, then attempt the Cut off adjust- ment again.

17. White Balance Adjustment

Purpose: To mix red, green and blue beams correctly for pure white.

Symptom of Misadjustment: White becomes bluish or reddish.

Test Point

Adj. Point

Mode

Input

 

 

 

White

Screen

CH o / p

RF

Raster

buttons

(APL

 

 

 

 

 

100%)

Tape

M. EQ.

Spec.

 

Pattern

 

 

---

Generator,

See below

 

Color analyzer

 

 

 

Figure

 

 

 

Color Analyzer

Fig. 3

Note: Use service remote control unit

1.Operate the unit more than 20 minutes.

2.Face the unit to east. Degauss the CRT using De- gaussing Coil.

3.Input the White Raster (APL 100%).

4.Set the color analyzer to the CHROMA mode and after zero point calibration, bring the optical recep- tor to the center on the tube surface (CRT).

5.Enter the Service mode. Press "VOL p" button on the service remote control unit and select "C/D" mode. (Display changes "C/D," "7F," "LANGUAGE," "AC- CESS CODE," "SOUND TYPE," "VIDEO TONE," "FM MODE," "V-OUT," "VIDEO," "AV MEMO," "STABLE SOUND," "FILTER," "500," and "YUV MEMORY" cyclically when "VOL p" button is pressed.) then Press No. 8 button on the service re- mote control Unit.

6.Press No. 4 button on the service remote control unit for Red adjustment. Press N0. 5 button on the service remote control unit for Blue adjustment.

7.In each color mode, Press "CH o/p" button to adjust the values of color.

8.Adjusting Red and Blue color so that the temperature becomes 9200K (x: 286 / y: 294)±3%.

9.At this time, Re-check that Horizontal line is white. If not, Re-adjust Cut-off Adjustment until the Hori- zontal Line becomes pure white.

10.Turn off and on again to return to normal mode. Re- ceive APL 100% white signal and Check Chroma temperatures become 9200K (x: 286 / y: 294)±3%.

Note: Confirm that Cut Off Adj. is correct after this adjustment, and attempt Cut Off Adj. if needed.

5-7

L6650EA

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Contents SRT2232X Important Safety Notice Table of ContentsSpecifications Description Condition Unit Nominal LimitDBµV DBµV AFT Pull In Range 10mV input MHz ±2.2 ±0.7Important Safety Precautions Safety Precautions for TV CircuitNot be Above 0.5 mA L6115IMPL6115IMP Precautions during Servicing Leakage Current Test Safety Check after ServicingClearance Distance How to Remove / Install Flat Pack-IC Standard Notes for ServicingCircuit Board Indications RemovalWith Iron Wire With Soldering IronInstructions for Handling Semiconductors Cabinet Disassembly Instructions Disassembly FlowchartDisassembly Method Reference Notes in the TableRear Cabinet Main CBATV Cable Wiring Diagram Electrical Adjustment Instructions How to set up the service mode+B Adjustment Service modeInitial Setting AV Memory Setting dataGeneral Set toEnter the Service mode. See CNTPurity Check Black Stretch Control AdjustmentSD Check Mode Position Adjustment Size Adjustment10. V. Position Adjustment Pedestal AdjustmentPIN Cushion Adjustment Software Reset14. H. Size Adjustment Mode Input Cut-off AdjustmentWhite Balance Adjustment Purity Adjustment Sub-Brightness AdjustmentFocus Adjustment Convergence Adjustment FiguresL6650BLS Block DiagramsSystem Control Block Diagram IF/Video Block Diagram RF/IF Signal Video Signal Audio SignalAudio Block Diagram L6650BLACRT/H.V. Block Diagram WF7 WF8HOT CIRCUIT. be Careful Power Supply Block DiagramL6650BLP Tolerance of Capacitors are noted with the following Schematic Diagrams / Cbas and Test PointsStandard Notes Wire Connectors How to read converged linesIs not consistent here Test Point InformationMain 1/4 Schematic Diagram Main 1/4 Ref No. PositionIC151 IC333 C-2 Q111 D-1 Q131 A-3 Q141 A-4 Q191 B-4 Q321 E-2Main 2/4 Schematic Diagram Main 2/4 Ref No. PositionIC431 IC771 IC801 CN801 L-4 CN802 L-3 L6650SCM2Main 3/4 Schematic Diagram Main 4/4 & CRT Schematic Diagram Main CBA Top View BL6650F01011-1Main CBA Bottom View CRT CBA Top View CRT CBA Bottom View L6650WF Waveforms20∝sec Wiring Diagram L6650WIIC333 TV Micro Computer Pin Signal Name FunctionIC PIN Functions Input For Remote Control White Balance AdjustmentSwitching if IC VCO JudgementExploded Views CabinetDetails for DY551 and surrounding parts 11-2 L6650CEXPacking 11-3 L6250PEXMechanical Parts List V501 and DY551 CombinationCRT Warning Label Location 20030303 12-1 L6650CACapacitors Electrical Parts List20030303 13-1 L6650EL 20030303 13-2 L6650EL 20030303 13-3 L6650EL Diodes Connectors20030303 13-4 L6650EL Coils 20030303 13-5 L6650ELICS 20030303 13-6 L6650EL Transistors20030303 13-7 L6650EL Resistors20030303 13-8 L6650EL 20030303 13-9 L6650EL Switches 20030303 13-10 L6650EL20030303 13-11 L6650EL Miscellaneous20030303 13-12 L6650EL SRT2232X L6650UA

SRT2232X specifications

The Sylvania SRT2232X is a modern flat screen television that has garnered attention for its impressive features and cutting-edge technology. With a sleek design and robust capabilities, this TV is an appealing option for home entertainment.

One of the standout characteristics of the SRT2232X is its 32-inch LED display, which provides vibrant colors and sharp images. Thanks to the LED backlighting, viewers experience enhanced brightness and improved energy efficiency. The screen boasts a resolution of 1366 x 768 pixels, making it suitable for everyday viewing, whether it be movies, sports, or gaming.

The SRT2232X incorporates several technologies that improve the viewing experience. One such technology is the Digital Noise Reduction, which minimizes unwanted noise and enhances picture clarity. This feature is essential for content with high motion, ensuring that viewers can enjoy a smoother image without distractions.

The television includes integrated digital tuners that allow users to access free-to-air digital channels without the need for an additional set-top box. This convenience is coupled with HDMI ports that enable users to connect various devices, such as gaming consoles and Blu-ray players, providing versatility in multimedia options.

Audio quality is equally important, and the SRT2232X does not disappoint. It features built-in speakers that deliver clear and rich sound, suitable for standard viewing. Additionally, it often includes audio enhancement technologies that improve sound output, transforming the viewing experience into a more immersive one.

Furthermore, the Sylvania SRT2232X is designed with smart connectivity options. It typically includes USB ports that allow for direct playback of media files from flash drives. This means users can easily watch their favorite videos or view images without complicated setups.

The product is also lightweight and easily mountable, making it a flexible option for various living spaces. Whether placed on a stand or wall-mounted, the aesthetic appeal of the SRT2232X fits well in contemporary decor.

Overall, the Sylvania SRT2232X successfully combines solid performance with great features, making it a noteworthy choice for those seeking an affordable yet capable flat screen television for their home. With its combination of display technology, smart features, and user-friendly design, it provides a pleasant viewing experience for all.
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