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Summary of Contents for Elenco Electronics RCC-7K
- Page 1 RADIO CONTROLLED CAR KIT MODEL RCC-7K Assembly and Instruction Manual Elenco Electronics, Inc. Copyright © 2001 Elenco Electronics, Inc. 753288-G...
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Page 2: Parts List
PARTS LIST Contact Elenco Electronics if any parts are missing or damaged. DO NOT contact your place of purchase as they will not be able to help you. CARD 1 - RESISTORS (in Bag 2) Symbol Value Marking Part #... - Page 3 BAG 3 - SCREWS (6RCC7KB3E) DESCRIPTION PART # You may have been given different screws from Screws 0.4” x 0.1” (10mm x 2.6mm) 640101 those specified here (and usually some spares). Screws 0.4” x 0.115” (10mm x 3.0mm) 640101E Contact Elenco if it is not clear which to use. Screws 0.3”...
- Page 4 The frequency of 27.9 MHz was selected for RCC-7K with the approval of the FCC (the US government) to minimize radio interference between this product and all other electrical products.
- Page 5 Take a closer look at the receiver schematic. The sub-circuit centered around transistor Q1 filters the antenna output, if an RCC-7K transmitter is operating nearby then the 27.9 MHz burst signal may be visible at its collector. Inductor L1 is tuned so that the circuit amplifies around 27.9 MHz while rejecting all other frequencies.
- Page 6 Introduction Assembly of your RCC-7K R/C Car Kit will prove to be an exciting project and give you much satisfaction and personal achievement. If you have experience in soldering and wiring techniques, then you should have no problem with the assembly of this kit. Care must be given to identifying the proper components and in good soldering habits.
- Page 7 IDENTIFYING CAPACITOR VALUES Capacitors will be identified by their capacitance value in pF (picofarads) or mF (microfarads). Most capacitors will have their actual value printed on them. Some capacitors may have their value printed in the following manner. For the No. Second Digit Multiplier Multiplier...
- Page 8 Inspection of Parts: Take a look at each of the parts bags and compare to the Parts List (on pages 1 & 2). Be sure that nothing was damaged during shipment and handling. Contact Elenco Electronics if you have any problems (phone number is on the back of this manual).
- Page 9 0.1mF Capacitor Driving Motor (marked 104): (the larger motor; Yellow Solder leads to motor wire goes to tab next to tabs, one lead is also Å marking in plastic) soldered to motor shell. You cannot get good connections soldering to the motor shell unless Green Wire you first file or scrape away a Yellow Wire...
- Page 10 Rear Wheels Locators NOTE: The next 3 steps will be much easier if you elevate the car about 1” using a small Rear Axle: object. the “grip” near the middle should be toward the left Gear for rear axle: slide on until it is firmly “grips”...
- Page 11 NOTE: Put some Vaseline or grease into the slots for the rod and some on the teeth of all the gears (motor gear, middle gear, and the rear axle gear). This will make the car go faster. Gear, Middle of rear section Rear Rod Quick Test: All 3 gears...
- Page 12 Screw Used (shown actual size) 0.4” x 0.115” 0.4” x 0.115” Screws Rear Section Cover NOTE: Make sure that the wires Quick Test: Lift the wheels off the ground so they from the ON/OFF switch may spin freely. Connect a 1.5V battery across the and the motor run out of motor wires with your hands, (+) terminal to green the rear section cover...
- Page 13 Bend wires to fit around post. They must NOT be tight (or the steering won’t work), stretch the wire with your fingers to loosen it if necessary. Spring for Steering Centering post is towards Steering front of car Alignment front Adjustment of car (triangular piece will...
- Page 14 Steering Motor 0.01mF Capacitor (the smaller motor; Blue (marked 103): wire goes to tab next to Solder leads to motor tabs, one lead is Å marking in plastic) also soldered to motor shell. You cannot get good connections soldering to Orange Wire the motor shell unless you first file or scrape...
- Page 15 Front Spring Front Wheel Shock Absorbers Post -14-...
- Page 16 0.3” x 0.1” Screws Screw Used (shown actual size) 0.3” x 0.1” Front Wheels Section Cover Quick Test: Install 4 fresh AA alkaline batteries in the battery cage, observing their polarity while doing so. Lift the front wheels off the ground so they may spin freely.
- Page 17 ASSEMBLE THE FOLLOWING COMPONENTS TO THE PC BOARD Review the soldering and parts identification instructions on p.5 at this time. In all of the following steps the components must be installed on the top legend side of the PC board. The board is turned over to solder the component leads.
- Page 18 Figure E Stand resistor on end as shown with the body inside the white circle (if a white circle is present). White Circle (see Figure E) R21 - 560W 5% 1/4W Res. (green-blue-brown-gold) R10 - 2.7kW 5% 1/4W Res. (red-violet-red-gold) R4 - 3.3kW 5% 1/4W Res.
- Page 19 (see Figure F) C1 - 10pF (10) Capacitor C10 - 0.01mF (103) Capacitor C2 - 27pF (27) Capacitor C3 - 27pF (27) Capacitor C7 - 0.1mF (104) Capacitor C8 - 500pF (501) Capacitor C4 - 3,300pF (332) Capacitor C9 - 0.01mF (103) Capacitor C11 - 2,200pF (222) Capacitor Figure F Figure G...
- Page 20 (see Figure H) Q5 - S8550 Transistor Q6 - S8550 Transistor Q8 - S8050 Transistor Q2 - 9014 Transistor Q3 - 9014 Transistor Q7 - S8050 Transistor Q14 - S8050 Transistor Q12 - S8550 Transistor Q9 - 9014 Transistor Q10 - 9014 Transistor Q13 - S8050 Transistor Q11 - S8550 Transistor Q1 - C945 Transistor...
- Page 21 TRANSMITTER TESTING If you have an oscilloscope then you may test the remote control transmitter for basic operation. Set the scope for 1V/div vertical scale and 1ms/div horizontal scale. Install a 9V battery in the transmitter if you haven’t already done so. Connect your scope probe to the transmitter antenna (leave the probe ground unconnected), turn on the transmitter, and push the left transmitter lever.
- Page 22 INTERCONNECTIONS & TESTING Wire Solder the red wire from the ON/OFF switch to this solder pad. BE CAREFUL TO AVOID TOUCHING NEARBY PADS! Red wire from switch Black wire from battery contact Ground Wire Solder the black wire from the battery contact to this solder pad.
- Page 23 Battery Tests Install 4 fresh AA alkaline (or re-chargeable nickel- cadmium) batteries in the battery cage, observing their polarity while doing so. Snap in the battery cover to close it. Battery Voltage: Using a multimeter set to DC volts, measure between the front-left and front-right battery contacts.
- Page 24 Steering Voltage Tests Antenna solder pad Activate the transmitter for left/right while measuring the voltage at pins 6 & 7 on the AF2311 IC. (Note: on some models the steering lever only works if you are also pressing the forwards/backwards lever). Notes: You may need to touch the antenna on the remote control unit to the antenna solder pad (next to C1), since...
- Page 25 Driving Motor Tests Yellow wire from driving motor Solder the yellow wire from the driving motor AND one of the wires from the light bulb to the Q6-Q8 junction on the PCB. BE CAREFUL TO AVOID ALSO TOUCHING NEARBY PADS.. Light Bulb Solder the green wire from the driving motor AND...
- Page 26 Light Bulb Cover NOTE: Tape the light bulb wires to the inside of the top frame so that the light bulb stays Light Bulb above it. Top Frame Screw Used (shown actual size) 0.4” x 0.1” Screw 0.4” x 0.1” -25-...
- Page 27 Receiver Alignment (recommended) Although tunable inductor L1 has been pre-aligned, you may adjust it for optimum performance. You need a very small screwdriver for this. The Car Antenna must be screwed together with the PCB and bottom frame as shown below, to make a good connection.
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Page 28: Troubleshooting
Tabs Rear Springs Decorative Decals: Place these on now, using your RCC-7K box as a guide. Note that some models may not use all of the stickers provided. Steering Alignment: Your car is ready for use. If it does not go straight when you release the right control lever, then adjust the steering alignment on the bottom front of the car until it works properly. - Page 29 LEFT lever. The RCC-7K operates best on a wood or tile floor or in your driveway. Never operate the car in the street. These suggestions will help make your car last for years of fun: ·...
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Page 30: Troubleshooting Guide
· Make sure your antenna is properly extended. · Nearby CB and amateur radio transmitters can interfere with your control of the RCC-7K. Try moving away from them. · Re-tune inductor T1 as per the Receiver Alignment on page 26. - Page 31 · Be sure that there is no soldering problems or short circuits on the Circuit Board. Redo the tests in section 19 Use the schematic and theory of operation section as guides. If you need additional assistance or replacement parts, contact: Elenco Electronics, Inc. 150 W. Carpenter Avenue http://www.elenco.com Wheeling, IL 60090 e-mail: elenco@elenco.com...
- Page 32 SCHEMATICS AND BLOCK DIAGRAM TRANSMITTER SCHEMATIC PC V R T1 V TB ENC RECEIVER SCHEMATIC DRIVING CIRCUIT (3.0V) (3.1V) (6V) (1.1V) 10pF (1.8V) (1.1V) (1.8V) (0.8V) V1 V (0.25V) V4 VSS DI (1.7V) (0.25V) BLUE (1.7V) BLACK STEERING CIRCUIT RECEIVER CIRCUIT (VOLTAGES ARE FOR DC IN IDLE MODE) -31-...
- Page 33 BLOCK DIAGRAM 27.9 MHz HOW IT WORKS Signal Driving Motor Encoding Filter/ Filter/ Decoding Circuitry Amplifier Amplifier Circuitry Steering Motor Pulse Sequence, Sequence Pulse Sequence, length depends on of Radio length depends on which command Frequency which command is was sent Pulses being sent PCB WIRING PLAN...
- Page 34 D - not possible, the obstacle blocks radio reception completely. 5. If the batteries in the RCC-7K are weak, the main effects you will notice are ..A - reduced remote control range and reduced power to the motor.
- Page 35 Here are some other exciting projects from Elenco you can build. EDUCATIONAL KITS Motion Detector Kit Stereo Cassette Player Kit with training course Model AK-510 Model AK-200 Easy-to-build kit teaches you basic mechanical and electronic circuits. You will have fun building this kit and Simple and fun to build, compact, portable and adds safety to learning how a tape player works.
- Page 36 Elenco Electronics, Inc. 150 W. Carpenter Avenue Wheeling, IL 60090 (847) 541-3800 http://www.elenco.com e-mail: elenco@elenco.com...
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