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Summary of Contents for ESPEC LCD-A1504
- Page 1 15″/20″ COLOR LCD TELEVISION LCD-A1504 LCD-A2004 The LCD panel is manufactured to provide many years of useful life. Occasionally a few non active pixels may appear as a tiny spec of color. This is not to be considered a defect in the LCD screen.
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Page 2: Specifications
SPECIFICATIONS <TUNER> ANT. Input ------------------- 80 dBµV, Video: PAL 87.5%, Audio: 30 kHz dev (1 kHz Sin) Test Input Signal----------- 400Hz 30% modulation Description Condition Unit Nominal Limit 1. Intermediate Freq. Picture 45.75 Sound 41.25 2. Color Killer Sens. CH-3 dBµV 3. -
Page 3: Wiring Diagram
Wiring Diagram To LCD Module Assembly CN320A CN321A LCD Main CBA CN101B CN102B CN103B T402 CN101A CN102A CN103A To LCD Module Assembly T401 Main CBA CN31A CN802 CN801 To Speaker To Speaker CN31B Function CBA Fig. D3 L4100DC... -
Page 4: Cable Wiring Diagram
Cable Wiring Diagram To LCD Module Assembly CN311A CN313A CN310A LCD Main CBA CN101B CN102B CN103B Main CBA Inverter CBA CN51 T1402 To LCD CN101A CN102A CN103A Module Assembly T1401 CN405 CN1401 T1404 To LCD Module Assembly T1403 CN53 CN802 CN801 To Speaker To Speaker... -
Page 5: How To Initialize The Lcd Television
HOW TO INITIALIZE THE LCD TELEVISION To put the program back at the factory-default, initialize the LCD television as the following procedure. How to initialize the LCD television: 1. Turn the power on. (Use main power on the TV unit.) 2. -
Page 6: Electrical Adjustment Instructions
ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: 1. Initial Setting “CBA” is abbreviation for “Circuit Board Assem- General bly.” Enter the Service mode. NOTE: Electrical adjustments are required after replacing Set the each initial data as shown on table 1 below. circuit components and certain mechanical parts. It is Table 1: Initial Data important to perform these adjustments only after all repairs and replacements have been completed. -
Page 7: Flicker Adjustment
+13.0±0.3V DC [LCD-A1504] DC Voltmeter +21.0±0.3V DC [LCD-A2004] Note: TP401(+B), TP300(GND), VR649 --- Main CBA 1. Connect DC Volt Meter to TP401 and TP300(GND). 2. Adjust VR649 so that the voltage of TP401 becomes +13.0±0.3V DC [LCD-A1504] or +21.0±0.3V DC [LCD-A2004]. L4100EA... -
Page 8: White Balance Adjustment
The following adjustment normally are not attempted in the field. Only when replacing the LCD Panel then adjust as a preparation. 4. White Balance Adjustment Purpose: To mix red, green and blue beams correctly for pure white. Symptom of Misadjustment: White becomes bluish or reddish. -
Page 9: Block Diagrams
BLOCK DIAGRAMS System Control Block Diagram L4100BLS... - Page 10 IF/Video Block Diagram L4100BLIF...
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Page 11: Audio Block Diagram
Audio Block Diagram L4100BLA... - Page 12 LCD Block Diagram ( A ) L4100BLLCD...
- Page 13 LCD Block Diagram ( B ) L4200BLLCD...
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Page 14: Power Supply Block Diagram
Power Supply Block Diagram L4100BLP... - Page 15 LCD Backlight Block Diagram ( A ) L4100BLLB...
- Page 16 LCD Backlight Block Diagram ( B ) L4200BLLB...
- Page 17 Main 1/4 & IR Sensor Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-A1504 LCD-A2004 L4100SCM1...
- Page 18 Main 2/4 Schematic Diagram L4100SCM2...
- Page 19 Main 3/4 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-A1504 LCD-A2004 L4100SCM3...
- Page 20 Main 4/4 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-A1504 CAUTION ! NOTE: CAUTION ! LCD-A2004 The voltage for parts in hot circuit is measured using For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
- Page 21 Function Schematic Diagram ( A ) Comparison Chart of Models and Marks MODEL MARK LCD-A1504 LCD-A2004 L4100SCF...
- Page 22 Function Schematic Diagram ( B ) Comparison Chart of Models and Marks MODEL MARK LCD-A1504 LCD-A2004 L4200SCF...
- Page 23 Inverter Schematic Diagram ( B ) Comparison Chart of Models and Marks MODEL MARK LCD-A1504 LCD-A2004 L4200SCINV...
- Page 24 LCD Main 1/2 Schematic Diagram Comparison Chart of Models and Marks MODEL MARK LCD-A1504 LCD-A2004 8-10 L4100SCL1...
- Page 25 LCD Main 2/2 Schematic Diagram Comparison Chart of 1 NOTE : Models and Marks CN104, CN105, CN301 are used for adjustment at factory. MODEL MARK LCD-A1504 LCD-A2004 8-11 L4100SCL2...
- Page 26 WAVEFORMS WF1 ~ WF8 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 14 of IC801 Q754 EMITTER Q751 EMITTER AUDIO 0.1V 0.5ms CVBS2 0.2V 20µs 0.5V 5µs Q701 EMITTER...
- Page 27 WF9 ~ WF14 = Waveforms to be observed at Models and Marks Waveform check points. MODEL MARK (Shown in Schematic Diagram.) LCD-A1504 LCD-A2004 Input: PAL Color Bar Signal (with 1kHz Audio Signal) R904 R997 ( A ) WF12 R994 ( B ) 10µs...
- Page 28 WIRING DIAGRAMS ( A ) 10-1 L4100WI...
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Page 29: Wiring Diagrams ( B )
WIRING DIAGRAMS ( B ) 10-2 L4200WI...
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