User manual SANYO VMC8619P SERVICE MANUAL

[. . . ] Before returning the set to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as terminals, screwheads, metal overlays, etc. to be sure that the set is safe to operate without the danger of electrical shock, Plug the AC line cord directly into a 120 V AC outlet. (Do not use a line isolation transformer during this check. ) Use an AC voltmeter with a sensitivity of 5000 ohms per volt (or more) as follows: Connect a 1500 ohms, 10 watt resistor, paralleled by a 0. 15 mfd, 150 VAC capacitor, between a known good earth ground (water pipe, conduit, etc. ) and the exposed metallic parts, one at a time. Measure the AC voltage across the 1500 ohms resistor and 0. 15 mfd capacitor combination. [. . . ] Rear B terminals (AUDIO/VIDEO B terminals) When the monitor B selector button at the front of the monitor is pressed, the audio and video signals from the component which is connected to these terminals can be monitored. Rear Y/C terminals (AUDIO/VIDEO Y/C terminals) When the monitor Y/C selector button at the front of the monitor is pressed, the audio and video signals from the component which is connected to these terminals can be monitored. Y/C (Mini DIN 4 pin) terminal specification 4 2 4 2 IN OUT 3 1 3 1 Pin No. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes. Color analyzer Adjustment mode Over scan mode ADJUSTMENT ITEM CHECK B+ VOLTAGE TIMING PATTERN PATTERN GENERATOR MONOSCOPE PATTERN SETTING VR LOCATION ADJUSTMENT PROCEDURE TEST POINT : D901(-) DIGITAL VOLT METER VALUE 38. 0 ± 0. 5 VDC. HOLD DOWN VOLTAGE SETTING PATTERN GENERATOR MONOSCOPE PATTERN BRIGHT VR and CONTRAST VR TO MAX. VR503 TEST POINT : ZD501(-) DIGITAL VOLT METER VALUE 8. 35 ± 0. 1 VDC. FOCUS ADJUSTMENT PATTERN GENERATOR MONOSCOPE PATTERN BRIGHT VR and CONTRAST VR TO 75%. SHARPNESS VR TO MAX. FTB FOCUS VR1 and VR2 Adjusting FBT Focus VR1, 2 make focus resolution of reach over 800TV lines, four corners must be aiso clear. HORIZONTAL PHASE ADJUSTMENT PATTERN GENERATOR MONOSCOPE PATTERN BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. FACTRY PRESETTING VR401 Adjusting VR401 horizontal phase make right and left of picture to <=1%. HORIZONTAL SIZE ADJUSTMENT VERTICAL LINEARY ADJUSTMENT PATTERN GENERATOR MONOSCOPE PATTERN VR306 Adjusting VR306 make signal side of picture of scale at 1. 5 ± 0. 5 position. PATTERN GENERATOR MONOSCOPE PATTERN BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. FACTRY PRESETTING VR302 Adjusting vertical linear control VR302 for equal spacing of lines between center extreme of scan [(Max-Min)/Average]<=10%. VERTICAL CENTER ADJUSTMENT PATTERN GENERATOR MONOSCOPE PATTERN VR303 Adjusting vertical center control VR303 to <=1%. VERTICAL SIZE ADJUSTMENT PATTERN GENERATOR MONOSCOPE PATTERN VR301 Adjusting vertical size control VR301 make signal side of scale is 1 ± 0. 3 position. ­6­ ADJUSTMENT ITEM WHITE BALANCE ADJUSTMENT AT VMC-8618 TIMING PATTERN PATTERN GENERATOR NO SIGNAL SETTING BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. VR LOCATION VR801, VR803, VR805, FBT FOCUS VR ADJUSTMENT PROCEDURE Adjust VR805 G-Bias to center. Adjust VR803 make Y value is 0. 298 ± 0. 015. PATTERN GENERATOR FULL WHITE VR804, VR802, Adjust VR501 make luminance with video BRIGHT VR , VR501 signal to 38 ~ 42 FL. CONTRAST VR Adjust VR804 make X value is 0. 281 ± and SHARPNESS 0. 015. Adjust VR803 make Y value is 0. 329 ± 0. 015. WHITE BALANCE ADJUSTMENT AT VMC-8619P PATTERN GENERATOR NO SIGNAL PATTERN GENERATOR FULL WHITE VR804, VR802, Adjust VR501 make luminance with video BRIGHT VR , VR501 signal to 38 ~ 42 FL. CONTRAST VR Adjust VR804 make X value is 0. 313 ± and SHARPNESS 0. 015. Adjust FBT screen VR make luminance without video signal is 1. 0 ~ 1. 5 FL. LUMINANCE ADJUSTMENT PATTERN GENERATOR NO SIGNAL PATTERN GENERATOR WINDOWS PATTERN Adjust VR501 make luminance is 38 ~ 42 FL. PATTERN GENERATOR FULL WHITE Adjust VR502 make luminance is 85 ± 3 FL. Adjust VR305 make V-Linearity of picture is in the best condition. PINCUSHION ADJUSTMENT VR305 PATTERN GENERATOR BRIGHT VR , CROSSHATCH PATTERN CONTRAST VR and SHARPNESS VR TO MAX. ­7­ The way of adjusting it which a color analyzer is not used for. ADJUSTMENT ITEM WHITE BALANCE ADJUSTMENT and LUMINANCE ADJUSTMENT TIMING PATTERN PATTERN GENERATOR NO SIGNAL SETTING BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. VR LOCATION VR801, VR802, VR803, VR804, VR805, FBT SCREEN VR ADJUSTMENT PROCEDURE VR801, VR802, VR803, VR804 and VR805 is center position. Adjust the VR801, VR803 and FBT SCREEN VR to dark gray with screen. PATTERN GENERATOR FULL WHITE VR804, VR802, Adjust the VR802 and VR804 to white BRIGHT VR , VR501 gray with screen. CONTRAST VR Adjust the VR501 it makes the screen of and SHARPNESS the monitor proper brightness. VR TO MAX. ­8­ MAIN BOARD (Foil side) 11 12 13 10 789 6 5 4 3 2 1 VR401 H-PHASE VR503 X-RAY VR501 ABL T502 VR303 V-CENTER IC202 1 VR306 H-SIZE IC301 1 VR304 PIN VR302 V-LIN VR301 V-SIZE T902 Fig. 4 VR804 VR801 VR803 R-GAIN R-BAIS B-BAIS VR805 VR802 Q804 G-BAIS B-GAIN Q802 LED101 S108 S107 S106 S102 S103 S105 S101 S104 Q806 FUNCTION BOARD (Foil side) VIDEO BOARD (Foil side) Fig. PARTS LIST LOCATION 1 1 2 2 3 3 4 4 5 6 7 8 9 9 10 11 12 13 14 15 16 16 17 18 19 20 PARTS NO. Materials of Capacitors and Resistors are abbreviated as follows ; Resistors Capacitors MT-FILM Metallized Film Resistor MT-POLYEST MT-GLAZE Metallized Glaze Resistor MT-COMPO OXIDE-MT Oxide Metallized Film Resistor TA-SOLD AL-SOLID NP-ELECT OS-SOLID 2. 5. Metallized Polyester Capacitor Metallized Composite Capacitor Tantalum Solid Capacitor Aluminum Solid Capacitor Non-Polarized Electrolytic Capacitor Aluminum Solid Capacitors with Organic Semiconductive Electrolytic Capacitor DL-ELECT Double Layered Electrolytic Capacitor Tolerance of Capacitor (10pF over) and Resistor are noted with follow symboles. F . . . . . . . . . . . . 1% G . . . . . . . . . . . . 2% J . . . . . . . . . . . . 5% K . . . . . . . . . . . . 10% M . . . . . . . . . . 20% N . . . . . . . . . . 30% Z . . . . . . . . . . +80% ~ -20% Capacitors P : pF U : µF Inductors MH : mH UH : µH N. S. P. [. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]