Vector The Black And White Monitor Faq And Guide
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Black & White Vector Monitor Guide Page 21 of 51 TUBE AND YOKE Replacement monitor tubes are currently available for the Electrohome G05-802 and Wells Gardner 19V2000, and can be purchased directly from Richardson Electronics, LTD. Visit their web page here: http://www.rell.com If you ask for a 19VARP4 tube (19” B&W vector), they will send you a Phillips M47EAA7WS bare tube. You will not receive the yoke or adjustment rings, so save all that you have. G05-805 and 15V2000 15” replacement tubes are available from Richardson Electronics. The original tube is a 15ST4730R, and the Richardson part number is: 15A DATA CRT. CRT (Neck) Pinout Here is the complete pinout of both the Electrohome and Wells-Gardner neck/tube. Pin 1 - Filament GND Pin 2 - G1 30V Pin 3 - G2 410V Pin 4 - G3 300V Pin 5 - Pin 6 - Pin 7 - K 94.5V Pin 8 - Filament B+ Inversion for Battlezone, Asteroids Deluxe or Omega Race Normally, video inversion for games that use mirrors takes place on the game board and not the monitor. Often a pin on the edge connector is grounded, or harness wire is reversed. Battlezone The Battlezone game boards normally outputs ‘inverted’ video. Connect P20-L to P20-P for noninverted video output. Battlezone P20 Pin K - Y Invert Pin L - X Invert Pin P - GND
Black & White Vector Monitor Guide Page 22 of 51 Asteroids Deluxe For video inversion on an Asteroids Deluxe upright, Pin 19 on the game board is grounded. For Asteroids Deluxe cocktails, both X-and Y-video inverts are used, so both pins 7 and 19 are grounded. For noninverted video output, pin 19 is unconnected and floats. Asteroids Deluxe P20 Pin 7 – Y Invert Pin 19 – X Invert Omega Race The Omega Race upright is the only cabinet for that game which uses inverted video. This is handled with the harness that connects from the game board to the monitor. Essentially the “X” output signal and “X” GND are reversed for inverted video. Below is a summary taken from the schematics: Omega Race Connector to Monitor Upright Cockpit/Mini/Cocktail Pin 1 - Z out Pin 1 – Z out Pin 2 - Y out Pin 2 – Y out Pin 3 - X GND Pin 3 – X out Pin 4 - Z GND Pin 4 – Z GND Pin 5 - Y GND Pin 5 – Y GND Pin 6 - X out Pin 6 – X GND Connector J7 on Game Board Upright Cockpit/Mini/Cocktail Pin 7 – Key Pin 7 – Key Pin 8 – Y out (ORN) Pin 8 – Y out (ORN) Pin 9 – X GND (Y-W) Pin 9 – X out (RED) Pin 10 Pin 10 Pin 11 – Z out (GRN) Pin 11 – Z out (GRN) Pin 12 Pin 12 Pin 13 Pin 13 Pin 14 Pin 14 Pin 15 – Z GND (WHT) Pin 15 – Z GND (WHT) Pin 16 – X out (RED) Pin 16 – X GND (WHT) Pin 17 – Y GND (BRN) Pin 17 – Y GND (BRN)
Black & White Vector Monitor Guide Page 23 of 51 You can also invert the video on the monitor itself, although this method leaves you with a monitor that must be altered to run in a non-inverted application (such as Asteroids, cabarets, etc.). You need to reverse the wires leading to the yoke. Care must be taken not to reverse the wrong wires. If you do reverse the wrong wires, you will fry your defection board. You can switch the two “Xs” with each other (i.e., black and yellow) or the two “Ys” with each other. But you cannot switch an “X” with a “Y”. Typically, you would only need to switch pins 1 and 2 for the “X” axis. P700 on the Deflection Board Pin 1 - “X” BLK Pin 2 - “X” YLO Pin 3 - “Y” BLU Pin 4 - Key Pin 5 - “Y” RED ADJUSTMENTS Brightness and Contrast These controls are preset at the factory, but may be adjusted to audit program material. Caution must be exercised when adjusting the brightness control. This control has more than 100% brightness range on most tubes. This control should be maintained below the point where a center spot appears on the CRT under a no input signal condition. Adjusting the control above this point may result in a phosphor burn. The brightness and contrast controls for the G05-801 are located on the right hand edge of the deflection amplifier PCB. R516 is the brightness control and R526 is the contrast control. Both are finger adjustment controls. The G05-802/805 has four adjustment pots instead of two, with vertical adjustment at R600 and R602. With a Wells-Gardner V2000, the vertical adjustment is at R600. To adjust the brightness and contrast on your monitor, turn brightness and contrast all the way down (counterclockwise). Then increase brightness until the images are barely visible. Adjust contrast for proper illumination. High Voltage Adjustment Located in the EHT supply module. Hole in screen cover provides access to this control. Caution - use insulated tool to adjust.
Black & White Vector Monitor Guide Page 24 of 51 Focus Control Adjustment Located in the EHT supply module. Hole in supply heat sink/wrap provides access to this control. Centering Most of Atari’s vector games have X and Y centering pots located on the game board to adjust any off-center images. However, most B&W vector boards do not have this feature. If you have a Battlezone or Red Baron board, however, you are in luck. It looks like Atari did plan to include X and Y centering pots during the engineering stage; why they left these out, I dont know. But it appears easy enough to add. X channel: The pot at R101 (XCENTER) should be 50 k. Add a 0.1 uF capacitor at C102. Add a 220k resistor at R100. Y channel: The pot at R91 (YCENTER) should be 50 k. Add a 0.1 uF capacitor at C101. Add a 220k resistor at R90. What you are essentially doing is adding a DC component to the output signal. The pots leads are connected to +15v and -15v, with the wiper in the middle mixing in the voltage-divided signal with the video signal at the final op-amp output. Why did Atari (and most everyone else) leave off centering electronics in B&W X/Y monitors? On a color monitor the yoke ring magnets are designed to mostly affect only it’s associated gun (Red, Green or Blue). As you move these magnets around they push and pull on the electrons coming from the guns, and by carefully adjusting them you can get all three guns point to the same spot (well in theory ;^), wherever that spot might happen to be. Walla! A nice white spot. After which you adjust the color monitor’s centering pots, which move all three guns at once, to bring that white spot back to the center of the screen. On a B&W screen there is only one gun. And since it does not need to be aligned with any other guns, you can just use magnets to push it around. So instead of color alignment, the magnetic yoke rings on the back of a B&W monitor are there to push and pull on the CRT trace until it is centered. What if the electronics are off a bit? Who cares, just push the trace back where it belongs with a magnet. Why no electronics? A cheap-o magnetic yoke ring is much less expensive than centering electronics. This is also why it is easy to use just about any B&W tube in X/Y games. There are no color alignment problems, so the yoke windings are not nearly as critical as they are in color X/Y monitors.
Black & White Vector Monitor Guide Page 25 of 51 Yoke Generally speaking, do not touch the yoke adjustment unless you are a qualified TV repair technician! The yoke should never require adjustment unless the monitor has been installed in a different type of game or the adjustment magnets have been tampered with. In either case, if the entire picture appears to be offset, and normal adjusting does not restore it to its proper position, then you will have to spend some time (a lot of time actually) adjusting the yoke assembly. The two yoke adjusters are located on neck of the monitor, and they affect the vertical and horizontal deflection of the electron beam. If yoke adjustment is necessary, follow the instructions given in the appropriate monitor manual.
Black & White Vector Monitor Guide Page 26 of 51 INSTALLING A CAP KIT Zanen Electronics 5023 52nd Street Lubbock TX 79414 806-793-6337 Fax: 806-793-9136 Zanen Kit #104 Bob Roberts also sells cap kits. Bob provides a kit for the G05-802/805 Vector Monitor, and can most likely help you with the G05-801 as well. [email protected] http://www.therealbobroberts.com Key: · Q = Transistor · R = Resistor · C = Capacitor (all polarized electrolytic) · F = Fuse · D = Diode · ZD = Zener Diode Note that the capacitors come in two types: _____ _____ | | --| |-- radial-lead | | ~~~~~ +---+ axial-lead | | Note, if you cannot find an exact replacement for one of the capacitors, you may keep this in mind. A capacitor with a difference that is less than 5% of the original value should work just fine. Back in the days of the G05, electrolytic capacitors had tolerances that were typically over 20%. So a modern capacitor will probably be a lot closer to the ideal value than the original cap that was in the chassis when it was new. CHASSIS TRANSISTORS All the monitor chassis transistors are mounted in a socket with two Phillips head machine screws. No soldering necessary; just unscrew the old one and replace. You cannot put these chassis transistors in backwards; the leads are offset so they will only fit into the chassis and screw down in one direction. If you put the transistors in backwards, the screw holes will not line up.
Black & White Vector Monitor Guide Page 27 of 51 Make sure you install a new clear plastic Mica insulator between the transistor and the metal monitor chassis. New ones are not included in the Zanen kit! If you have some white heat sink grease, put a light coating on both sides of the Mica insulator. Monitor Chassis Parts Location Part Number Notes Q608 2N3716 transistor Q609 2N3792 transistor Q607 on G05-801 Q708 2N3716 transistor Q709 2N3792 transistor Q707 on G05-801 Important: after replacing the above transistors, use your DMM set to Ohms and check the continuity between the metal monitor chassis and the metal case of the above transistors. If there is continuity (zero ohms), you need to replace the thin clear plastic Mica insulator that goes between the transistor and the monitor chassis. There should be NO continuity! If there is continuity, you will usually burn out R718, R719, and others in the pre-amplification stage. You will probably also take out the 2N3716 or 2N3792 involved too. Note you may have to unplug the monitor chassis transistor connections to the Deflection board to get a good continuity test (if you havent already removed the Deflection board!). You will most likely find bad solder joints at many of the connector pins, which should always be reflowed.
Black & White Vector Monitor Guide Page 28 of 51 G05-801 DEFLECTION BOARD Zanen G05-801 Deflection PCB Parts Location Part Number Upgrade Notes C804 470 uf 50V capacitor C806 470 uf 50V capacitor NON-Zanen G05-801 Deflection PCB Parts Location Part Number Upgrade Notes C506 45 uF 125V LOW ESR capacitor F600 2 amp pico fuse F700 2 amp pico fuse G05-802 DEFLECTION BOARD Zanen G05-802 Deflection PCB Parts Location Part Number Upgrade Notes C500 2.2 uF 50V radial capacitor C501 2.2 uF 50V radial capacitor C502 2.2 uF 50V radial capacitor C503 2.2 uF 50V radial capacitor C504 47 uF 50V radial capacitor NON-Zanen G05-802 Deflection PCB Parts Location Part Number Upgrade Notes F100 5 amp slo-blo fuse F101 5 amp slo-blo fuse F102 1 amp slo-blo fuse F600 2 amp Fast-blo fuse F700 2 amp Fast-blo fuse DB100 8A 200V SI Bridge Rectifier Diode bridge (NTE5313) C100 6800 uF 50V radial capacitor
Black & White Vector Monitor Guide Page 29 of 51 C101 6800 uF 50V radial capacitor C102 0.1 uF 50V tantalum axial capacitor Yes Power filter cap. Original is ceramic. C103 0.1 uF 50V tantalum axial capacitor Yes Power filter cap. Original is ceramic. V2000 DEFLECTION BOARD Zanen V2000 Deflection PCB Parts Location Part Number Upgrade Notes C500 1 uF 50V radial capacitor C501 1 uF 50V radial capacitor C502 1 uF 50V radial capacitor C503 1 uF 50V radial capacitor C504 22 uF 250V radial capacitor C603 2.2 uF 50V radial capacitor C703 2.2 uF 50V radial capacitor NON-Zanen V2000 Deflection PCB Parts Location Part Number Upgrade Notes F100 5 amp slo-blo fuse F101 5 amp slo-blo fuse F102 1 amp slo-blo fuse F600 2 amp Fast-blo fuse F700 2 amp Fast-blo fuse DB100 8A 200V SI Bridge Rectifier Diode bridge (NTE5313) C100 6800 uF 50V radial capacitor C101 6800 uF 50V radial capacitor C102 0.1 uF 50V tantalum axial capacitor Yes Power filter cap. Original is ceramic. C103 0.1 uF 50V tantalum axial capacitor Yes Power filter cap. Original is ceramic.
Black & White Vector Monitor Guide Page 30 of 51 G05-801 HIGH VOLTAGE The High Voltage PCB (in the metal cage with the flyback transformer). Zanen G05-801 HV PCB Parts Location Part Number Upgrade Notes C901 47 uF 50V capacitor C909 4.7 uF 150V capacitor C910 470 uF 50V capacitor NON-Zanen G05-801 HV PCB Parts Location Part Number Upgrade Notes F901 1 amp fast blow fuse G05-802 HIGH VOLTAGE The High Voltage PCB (in the metal cage with the flyback transformer). Zanen G05-802 HV PCB Parts Location Part Number Upgrade Notes C900 1000 uF 50V radial capacitor C901 1000 uF 50V radial capacitor C904 47 uF 50V radial capacitor C908 4.7 uF 250V radial capacitor