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CONTENTS Page i-ii SAFETY PRECAUTION................1. SET-UP ADJUSTMENTS................1-15 2. TIMING CHART....................3. IC APPLICATION................... 17-19 4. CIRCUIT DESCRIPTION................. 20-27 28-53 5. SERVICE PARTS LIST................... 54-61 6. EXPLODED VIEW..................7. DIAGRAMS....................62-64 NOTICE The information in this document is subject to change without notice.
Scale (Two 50cm scales put together so that no visual aberration occurs.) Frequency counter Digital wattage meter Landing meter................LSS LND-070 or 072 Degausser Interface adapter (Iiyama handmade) Short-connector (Iiyama handmade) <Preparation> Place the monitor without tilting. Connect the signal cable from the signal generator to the monitor.
There are two ways to enter the Factory Mode. 1. Turn OFF the Power Switch. Connect the Iiyama short-connector to the RS connector on the PWB- MAIN and set S1 switch on the PWB-RS of the short-connector to ADJ.MODE side. Turn ON the Power Switch and you are in the Factory Mode.
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EXTERNAL DEGAUSS Make sure you disable the Landing-TL/TR/BL/BR and N-S RRC settings before performing the external degauss. Follow the procedure below depending on the adjustment mode you are in. PROCEDURE USER MODE 1) Select Degauss and press the MENU Button so that the Landing-TL/TR/BL/BR and N-S RRC will be disabled.
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1-1. 80V-ADJ adjustment [PWB-MAIN] Voltage Receive a cross-hatch inverted signal of MODE 5 when applying the AC voltage of 110±10V. Connect the DC voltmeter between CONNECTOR TP and GND (chassis). Adjust the voltage to DC 80±0.5V with VR930 (+B ADJ). VR930 +B ADJ 1-2.
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1-4. POWER FACTOR CIRCUIT confirmation [PWB-MAIN] Receive a cross-hatch inverted signal of MODE 5. Turn OFF the Power Switch. Connect the DC voltmeter between TP4 and TP0. Turn ON the Power Switch. Confirm that the voltage is DC 400±10V. Remove the DC voltmeter. 1-5.
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1-9. H-BLANKING confirmation Receive a cross-hatch inverted signal of MODE 5. Minimize the horizontal size (H-size) with the front buttons. Raster rolling Picture Select Auto-da-test3 and press the MENU Button so that the automatic confirmation program starts. Confirm that X of the right hand side figure is as follows: X </= 3.0mm. Adjust the horizontal size roughly with the front buttons.
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1-14. PICTURE SIZE, POSITION AND DISTORTION adjustment (Criteria) Receive a cross-hatch inverted signal of MODE 4. Adjust the picture size and position to the specified setting below. Picture H-size: 360±4mm H-position: | A–B |<4mm V-size: 270±4mm V-position: | C–D |<4mm Correct the side distortion with the front buttons so that X of the right hand Bezel side figure is as follows: | X | </= 0.5mm/30mm when selecting the most...
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1-17. Automatic COLOR adjustments WARNING: Do not change the horizontal and vertical sync signal or the frequency while the automatic COLOR adjustments are underway. Color analyzer setting: cd/m² Luminance unit switch Luminance unit switch: cd/m B.P.S. DIP switch: 9600 (1000) Turn ON the color analyzer switch and press 0-CAL switch before use.
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1-19. BRIGHTNESS adjustment [PWB-MAIN] Brightness Receive an entire white raster signal of MODE 4. Apply a photometer to the screen center. Adjust VR502 (ABL-ADJ) so that photometer reads 105±5cd/m VR502 ABL-ADJ 1-20. SYNC SIGNAL INPUT confirmation Receive a cross-hatch inverted signal of fH 47.6kHz. Select composite and sync on green signal inputs respectively by the signal generator.
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1-24. V-CONVERGENCE confirmation Receive a cross-hatch inverted signal of MODE 5. Select Auto-da-test3 and press the MENU Button so that the automatic confirmation program starts. Confirm that the vertical line is diverged. Back-raster 1-25. RASTER REGULATION (DYNAMIC) confirmation Receive an entire white signal of MODE 5. Picture Set the input signal by the signal generator as follows: V-DISP-TIME: 150 V-POSI-TIME: 450...
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1-27. LUMINANCE DIFFERENCE adjustment Receive an entire white signal of MODE 5. Apply a photometer to C (center), T (top), B (bottom), L (left) and R (right) in the right hand side figure. Confirm that the luminance difference between C and T, C and B, C and L, C and R is within ±10cd/m respectively.
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1-29. TCO requirement 1-29-1. VLF adjustment [PWB-MAIN] Note: The VLF adjustment requires the precise measuring conditions. Make sure the adjustment is carried out in the following environment. All metal parts should be attached to the monitor. All the electrical equipment used for the adjustment including the monitor should be grounded to the same outlet.
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1-30. ITC (Integrated Tube Component) adjustments The following ITC adjustments should be made only when a new picture tube is installed, or convergence is poor. All set-up adjustments above-mentioned must be completed before any further ITC adjustment is attempted. Receive an entire white raster signal and turn ON the Power Switch. Perform adjustment after a warm-up of at least an hour.
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1-30-2. Yvs adjustment Picture Picture Notes: 1. This adjustment should be performed only when the picture distortion in the right hand side figure is permitted. 2. Be sure to perform the 1-30-6. YV adjustment after this Bezel adjustment because the convergence adjusted by YV volume is changed at the same time during this adjustment.
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1-30-6. YV adjustment Receive a red and blue cross-hatch signal. Adjust the specified YV volume so that red and blue beams converge each other at the upper and lower edges of the horizontal line. 1-30-7. YH adjustment Receive a red and blue cross-hatch signal. Adjust the specified YH volumes so that vertical cross lines converge each.
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Video Sync V-parameters H-parameters O: Total period A: Total period P: Sync.width B: Sync.width Q: Back porch C: Back porch R: Active video D: Active video S: Front porch E: Front porch Sync Sync polarity Horizontal (µsec) Vertical (msec) Mode VESA Timing Name (kHz) (Hz)
3. IC APPLICATION Ref No. Description Application Ref No. Description Application Deflection circuit Sub microprocessor circuit IC350 UPC1884CT H&V synchronous signal processor IC701 741Z611-10 Sub microprocessor with geometrical compensation, H&V IC703 M62393P D/A converter oscillator High voltage circuit IC401 LA7840L Vertical output IC502 SLA5041 FET array...
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Main microprocessor specifications Name Function Function Name H-LIN2 H-LIN2 switching signal output 5V Vcc Avref. H-LIN1 H-LIN1 switching signal output 5V Vcc AVDD DRIVE DRIVE switching signal output PROM DATA terminal EP-SDA BNC/D-SUB switching signal PROM CLOCK terminal EP-SCL S.O.G. S.O.G.
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Sub microprocessor specifications Name Function Name Function DA-SDA D/A DATA input/output terminal 5V Vcc DA-SCL D/A CLOCK output terminal N.C. N.C. N.C. N.C. ON-TIME POWER-ON time detection N.C. N.C. Temp. Temperature detection N.C. N.C. RESET Sub microprocessor RESET signal input AD-Vref A/D reference voltage 5V X'TAL 4MHz...
4. CIRCUIT DESCRIPTION 4-1. POWER FACTOR circuit Q The full-wave rectified voltage waveform from D942 and smoothed voltage waveform from C926 are multiplied and compared to R the voltage waveform from current detect resistor R925 of Q934. Q934 is turned off when R exceeds Q, and is turned on when R is 0V.
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4-2. MAIN POWER circuit 400V is supplied to this circuit from the POWER FACTOR circuit. This circuit is fly-back type circuit which includes IC930 controls PWM (Pulse Width Modulation) CONTROL circuit. The T930 secondary provides the following DC voltages: Q 80V line: Supplied to the DBF (Dynamic Beam Focus), HIGH VOLTAGE OUTPUT CONTROL, and the CUT-OFF CONTROL circuits and the VIDEO OUTPUT IC as power source.
4-3. SUB POWER circuit IC931 included in this circuit consists of the POWER MOS-FET and the CONTROL circuits and modulates the pulse width. The current fed back from pin 9 of T931 is input to the control terminal of IC931. The T931 primary provides the DC voltage (approx.
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4-7. SIGNAL PROCESSING circuit Input signal from D-SUB or BNC connector is converted to the waveform by IC101. The input signal is applied to pin 17 of IC101 from the MAIN MICROPROCESSOR (IC301) and then switched to D-SUB when pin 17 of IC101 is “HIGH”...
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4-9-2. HORIZONTAL OSCILLATION A drive pulse output from pin 17 of IC350 is amplified by Q350 and then applied to Q504 gate of the DRIVE circuit. 0.7V 0.2V 12Vp-p Pin 17 of IC350 Inversion-amplified waveform by Q350 4-9-3. VERTICAL OSCILLATION The sawtooth-wave is output from pin 8 of IC350 and applied to the VERTICAL DEFLECTION OUTPUT circuit.
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4-13. DYNAMIC BEAM FOCUS circuit The H-parabolic wave from pin 13 of IC350 is amplified by 18 times by Q518 and Q519 respectively. The amplified parabolic wave is pressured up to 500vp-p by T503 and combined with V-parabolic wave and then added to pin 13 of T501.
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4-15. VIDEO and ON SCREEN DISPLAY CONTROL circuits The video signal from CN101 or CN102 is terminated to 75Ω. The video signal is switched to D-SUB or BNC by the VIDEO SIGNAL SWITCHING circuit that is controlled by the MAIN MICROPROCESSOR (IC301). The adjustment item of Signal Select selects D-SUB or BNC.
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4-17. LANDING CORRECTION circuit This circuit detects the followings to correct LANDING discoloration. • Magnetic field..TERRESTRIAL MAGNETIC SENSOR (IC708) detects the magnetic field. • SWITCH ON DRIFT..TH801 detects surrounding temperature. Thermistor attached to the funnel detects the temperature of funnel. •...
5. SERVICE PARTS LIST WARNING ! The components identified by “ ! ” in this manual are critical for safety. Replace only with part number specified . <CONTENTS> -Page- Abbreviations and Marks..................FAMILY-TREE....................ASSY-PACKING..................... ASSY-MONITOR....................ASSY-PWB-MAIN....................32-41 ASSY-PWB-VIDEO..................... 42-52 SUB-MATERIAL.......................
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ELECTRICAL PARTS LIST Abbreviations in PART section Abbreviation Meaning Resistor-Carbon R-MB Resistor-Metal R-CE Resistor-Cement R-FUSE Resistor-Fuse Capacitor-Ceramic Capacitor-Electrolytic C-PP Capacitor-Polypropylene C-MF Capacitor-Multilayer Metallized Polyester Film Diode Zener Diode Transistor Photo Coupler Positive Thermistor Horizontal Drive Transformer Flyback Transformer Variable Resistor Switch Switching Transformer...
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DWG. TITLE : FAMILY-TREE Q'TY REV. REF.NO. PART DESCRIPTION PART NO. PRICE REMARK ASSY-PACKING (LNN) T985S046-20 ASSY-PACKING (HNE) T985S046-30 ASSY-PACKING (HNB) T985S046-40 ASSY-MONITOR T950R089-20 ASS-PWB-MAIN T950T051-10 ASSY-PWB-VIDEO T950T052-10 SUB-MATERIAL 951V001-10 DWG. TITLE : ASSY-PACKING Q'TY REV. REF.NO. PART DESCRIPTION PART NO. PRICE REMARK RATING-PLATE...
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