AUTOMATIC SEQUENTIAL VIDEO SWITCHER Ramsey Electronics Model No.
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Ramsey Publication No. MAVS10 Manual Price Only $5.00 INSTRUCTION MANUAL FOR AUTOMATIC SEQUENTIAL VIDEO SWITCHER TABLE OF CONTENTS Introduction ................................... 4 Circuit Description ......................... 4 Block Diagram................................ 5 Parts List ........................................ 6 Parts Layout Diagram .................... 7 Schematic diagram ....................... 8 Assembly instructions ................. 10 Initial Testing ...............................
INTRODUCTION In today’s world there are many situations that require monitoring, but no one can be in four places at once. Now, with the AVS10, you have the opportunity to see four different locations and keep an eye on your precious property. The front doorbell is ringing, the baby is napping, one of your children is playing with friends on the backyard trampoline and another is shooting hoops in the driveway.
AVS10 Block Diagram Micro Initialization Check Switch 1 Video Enabled Turn ON Video 1 Conrol Line 1 to 5 Second Delay Turn OFF Video 1 Conrol Line Check STOP/SCAN Switch Video Disabled STOP/SCAN Not Pressed STOP/SCAN Pressed IN Check Switch 2 Video Enabled Turn ON Video 2 Conrol Line 1 to 5 Second Delay Turn OFF Video 2 Conrol Line Check STOP/SCAN Switch Video Disabled Check Switch 3 Check Switch 4 STOP/SCAN Not Pressed Check 3 the same as switch 1 and 2 above.
PARTS LIST RESISTORS 1 1K ohm resistor [brown-black-red] (R1) 1 5.6K ohm resistor [green-blue-red] (R3) 4 10K ohm resistor [brown-black-orange] (R4,5,6,7) 1 10K PC mount potentiometer (R2) CAPACITORS 1 100 pF ceramic disc capacitor [marked 100, 101, or 100K] (C1) 2 .01 µF ceramic disc capacitors [marked .
AVS10 PARTS LAYOUT DIAGRAM AVS10 – 7
AVS10 – 8
ASSEMBLY INSTRUCTIONS In ALL PC board assembly steps, our word "INSTALL" means to do this: Insert the part, oriented or "pointed" correctly, into its holes in the PC board. If helpful, gently BEND the part's wire leads or tabs to hold it in place, with the body of the part snugly against the top side ("component side") of the circuit board. The “component side” is silkscreened with the part numbers for easy parts location identification. Solder ALL wires or pins of the part.
3. Install U1, the MC68HRC908JK1 programmed chip [20 pin chip with paper label] into the IC socket. Check the orientation before installing. The chip is marked with a dot or notch on one end which must be lined up with the notched end shown on the PC board silkscreen and parts layout diagram. 4. Install S2, the DPDT pushbutton switch. Be sure it is flat to the PC board before soldering. 5. Install S3, the other DPDT pushbutton switch. 6. Install R3, 5.6K ohms (green-blue-red). 7.
18. Install C5, 10µF electrolytic capacitor. Electrolytic capacitors also have a polarity and must be installed properly. You will note a “+” symbol on the PC board silkscreen. This marks the positive side of the capacitor. Most manufacturers mark the negative side of the cap with a band containing minus signs (“-”) or zeros. Also, the capacitor has a long and a short lead. The short lead is the negative. Orient the capacitor properly and solder in place. 19.
INITIAL TESTING If any of the following steps fail to produce the desired result, turn to the troubleshooting section of the manual (below). You will need at least one video source, power for that source, and RCA cables to connect the source to the video input of the AVS10 and to connect the output of the AVS10 to your monitor. The number of cables you need depends on the number of video sources you are connecting. • Connect your 12VDC power supply to the AVS10.
• Correct installation of all jumpers. • Check the polarity on your power supply. The AVS10 requires a positive tip supply! If you still cannot get the unit to function, read the warranty instructions on page 15. A simple recheck of your construction will usually solve any problems. CONCLUSION We sincerely hope that you will enjoy the use of this Ramsey product. As always, we have tried to compose our manual in the easiest, most “user friendly” format that is possible.
AVS10 – 14
The Ramsey Kit Warranty Please read carefully BEFORE calling or writing in about your kit. Most problems can be solved without contacting the factory. Notice that this is not a "fine print" warranty. We want you to understand your rights and ours too! All Ramsey kits will work if assembled properly. The very fact that your kit includes this new manual is your assurance that a team of knowledgeable people have field-tested several "copies" of this kit straight from the Ramsey Inventory.
AVS10 AUTOMATIC VIDEO SWITCHER Quick Reference Page Guide Introduction to the AVS10 Circuit Description Initial Testing Troubleshooting Ramsey Warranty REQUIRED TOOLS • Soldering Iron (WLC100) • Thin Rosin Core Solder (RTS12) • Needle Nose Pliers (MPP4 or RTS05) • Small Diagonal Cutters (RTS04) ADDITIONAL SUGGESTED ITEMS • • • Helping Hands Holder for PC Board/Parts (HH3) Technician’s Tool Kit (TK405) Desoldering Braid (RTS08) Manual Price Only: $5.00 Ramsey Publication No.
