FILE NO. SERVICE MANUAL Color Video Monitor VMC-8618 (Product Code : 114 950 71) (U.S.A, Canada) VMC-8619P (Product Code : 114 950 74) (Europe) (Product Code : 114 950 76) (U.K.) (Product Code : 114 950 78) (Australia) CONTENTS SPECIFICATIONS .................................................................... 3 1. OPERATING INSTRUCTIONS ............................................. 4 2. SERVICE ADJUSTMENTS ................................................... 6 3. PARTS LIST ....................................................................... 10 CIRCUIT DIAGRAMS NOTE: 1. Parts order must contain model number, part number, and description. 2. Substitute parts may be supplied as the service parts. 3. N.S.P. : Not available as service parts. Design and specifications are subject to change without notice. L8MV5/US,XE,UK,AU REFERENCE No.SM5310261 SAFETY PRECAUTIONS WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions for this recording or playback equipment. The following precautions are necessary during servicing: 1. Many electrical and mechanical parts in this recorder have special safety-related characteristics for providing protection against shock, fire and other hazards. These characteristics often go unnoticed in a visual inspection, and the protection afforded by them cannot necessarily be obtained by using replacement components with higher ratings (voltage, wattage, etc.). Replacement parts having special safety-related characteristics are identified in this manual, and in the schematic diagrams, by the symbol ! . These components have values that are of special significance to product safety. Should any component (identified by the symbol ) need to be replaced, use only the part designated in the parts List. Do not deviate from the specified resistance, wattage, and voltage ratings. 3. 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. Reverse the AC plug at the AC outlet and repeat the AC voltage measurements for each exposed metallic part. The measured voltage must not exceed 300 mVrms. This corresponds to 200 µA AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately. Fuse symbol marks. For CANADA 2. 4. Video Monitor For U.S.A. Fuse rating is marked at adjacent fuse. UNDERWRITERS LABORATORIES Standard CAUTION "Risk of fire-replace fuse as marked" ­2­ SPECIFICATIONS Color system : Picture tube : Resolution : Input terminals : PAL/NTSC, selected automatically 18 incht (VMC-8618) , 19 incht (VMC-8619P) More than 800 TV lines Separate Y/C signal, mini-DIN 4-pin connector (1) Y signal: 1.0 Vp-p, 75 ohm negative sync C signal: 0.286 Vp-p, 75 ohm negative sync, bridge connection possible Composite sync signal: 1.0 Vp-p, 75 ohm BNC connector (2) Audio signal: -6dBs (400 mVrms), RCA pin (3), bridge connection possible Separate Y/C signal, mini-DIN 4-pin connector (1) Y signal: 1.0 Vp-p, 75 ohm negative sync C signal: 0.286 Vp-p, 75 ohm negative sync, bridge connection possible Composite sync signal: 1.0 Vp-p, 75 ohm BNC connector (2), automatic temination setting Audio signal: -6dBs (400 mVrms), RCA pin (3), bridge connection possible YES 1W Variable round x 1 100 to 240 V AC, 50/60 Hz 95 Watts -10 °C to 45 °C storage temperature 10 % to 90 % 448 x 443 x 447 mm 25kg Outout terminals : Overscan or underscan selection: Audio output : Speaker : Power source : Power consumption : Ambient operating temperature : Ambient operating humidity : Dimension (W x H x D ) : Weight : Dimensions W D H Fig. 1 ­3­ 1. OPERATING INSTRUCTIONS 1-1. FRONT PANEL CONTROLS 2 45 6789 SCAN G 3 F 1 Fig. 2 1. Speaker When the monitor selector button (A, B or Y/C) is pressed, the speaker lets you hear the sound from the components which are connected to the terminals at the rear of the monitor. (Use components which produce audio output.) 2. On-screen display button (OSD) When this button is pressed, the menu screen appears on the monitor screen. 1.COLOR 2.TINT 3.BRIGHTNESS 6.VOLUME 8.LANGUAGE 9.TITLE 6. Underscan/overscan select button (SCAN) The initial setting is for the normal screen (overscan). If the SCAN button is pressed, the screen will become smaller (underscan) than the normal screen. Change this setting in cases such as when screen display characters are missing. If the CSAN button is pressed once more, the normal screen is display again. 7. Monitor A selector button (A) When this button is pressed, the audio and video input changes to the component which is connected to the A terminals at the rear of the monitor. 8. Monitor B serector button (B) When this button is pressed, the audio and video input changes to the component which is connected to the B terminals at the rear of the monitor. 9. Monitor Y/C selector button (Y/C) When this button is pressed, the audio and video input changes to the component which is connected to the Y/C terminals at the rear of the monitor. 10. Power indicator (POWER) Lights when the power is on. 11. Power button (POWER) Press this button to turn the power on and off. 4.CONTRAST 10.VERSION 5.SHARPNESS 3. Cursor ( ) button ( ) When this button is pressed, the cursor moves down. When it reaches the bottom, it reappears at the top. In addition, this button is used to make adjustment values smaller. 4. Cursor ( ) button ( ) When this button is pressed, the cursor moves up. When it reaches the top, it reappears at the bottom. In addition, this button is used to make adjustment values larger. 5. Display selector button (ENTER) If this button is pressed while a picture is on the monitor screen, the screen changes to the adjustment screen. If the button is pressed once more, the picture returns to the previous screen. ­4­ 1-2. REAR PANEL CONTROLS & CONNECTION 2 3 4 1 Fig. 3 1. AC INPUT socket Connect the AC power cord (supplied) securely to this socket and to a wall outlet. 2. Rear A terminals (AUDIO/VIDEO A terminals) When the monitor A 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. 3. 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. 4. 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. 1 2 3 4 Signal GND (Y) GND (C) Y C Fig. 4 ­5­ 2. SERVICE ADJUSTMENTS 1. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes. NOTE Be sure to use a non-metallic driver for adjusting there VRs. A metallic driver can cause damage by shorting. Adjustment tool 1. Digital multi meter 2. Pattern generator 3. 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. 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 FBT screen VR make luminance without video to 1.0 ~ 1.5 FL. Adjust VR801 make X value is 0.281 ± 0.015. 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. VR TO MAX. Adjust VR802 make Y value is 0.298 ± 0.015. BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. VR801,VR803, VR805, FBT FOCUS VR Adjust VR805 G-Bias to center. Adjust FBT screen VR make luminance without video to 1.0 ~ 1.5 FL. Adjust VR801 make X value is 0.313 ± 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. VR TO MAX. Adjust VR802 make Y value is 0.329 ± 0.015. FBT SCREEN BRIGHT VR , VR CONTRAST VR and SHARPNESS VR TO MAX. VR501 BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. VR502 BRIGHT VR , CONTRAST VR and SHARPNESS VR TO MAX. 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. Then make sure Full White luminance whether it is 38 ~ 42 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. 5 ­9­ Fig. 6 3. 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. 645 048 3462 645 051 0755 645 048 3431 645 051 0748 645 048 3479 645 051 0762 645 048 3493 645 049 9630 645 046 6458 645 046 6717 645 046 4829 645 034 3605 645 048 3486 645 049 9623 645 046 6441 645 046 4829 645 046 4874 645 046 6212 645 046 6229 645 046 4836 645 048 3523 645 046 5239 645 046 5840 645 046 4928 645 046 4966 645 046 4843 DESCRIPTION FRONT PANEL 19" AA-51(EXCEPT VMC-8618) FRONT PANEL 19" OC-00067(VMC-8618) DIGITAL CONTROL STICKER 19" (EXCEPT VMC-8618) DIGITAL 19" OC-00067(VMC-8618 ONLY) CONTROL PANEL 19" AA-51 ...