Elenco Electronics AK-700 Manuel d'instructions

PULSE/TONE TELEPHONE KITMODEL AK-700/PT-323K Assembly and Instruction Manual

-9-IntroductionThe most important factor in assembling your Tone/Pulse Telephone Kit is good soldering techniques. Usingthe proper soldering iron is o

-10-SECTION 5 - EQUIPMENT NEEDEDTools Needed (not provided)Long Nose PliersPhillips Screwdriver (small point size)Diagonal Cutters Small Pencil Type S

-11-PC BOARD ASSEMBLYIdentify and install the following parts as shown in Figure 6-1. After soldering each part, place a check in thebox provided.Figu

Install the following parts. After soldering, place a check in the box provided.Identify the ringer switch as shown in Figure 6-2a. The ringer switch

-13-RINGER TEST (Using a 9 Volt Battery)Test Equipment Needed• 9 volt battery (not provided). Use a fresh alkaline battery.• 9 volt battery snap.Testi

-14-RINGER TEST (Using a Power Supply)Test Equipment Needed (not provided)• 9VDC power supply.Since capacitor C1 blocks the DC voltage, it is shorted

-15-11. Unplug the telephone cord from the modular jack.12.Peel the backing off of the buzzer side of the buzzer pad and place it on the buzzer as sho

-16-Figure FElectrolytics have a polaritymarking indicating the (–)lead. The PC board ismarked to show the leadposition. Mount the capacitorlaying dow

Identify the hook switch. The hook switch mounts to the copper side of the PC board. Insert the switch tabsinto the mounting holes (see Figure 6-10a)

Identify the speaker with pad, 3” gray wire,and the second half of the 4” red wire (the firsthalf was used for the microphone). Cut a 2”piece from the

SECTION 1 - INTRODUCTIONThe Model AK-700 / PT-323K is a push button electronic telephone kit. Your telephone is equipped with thefollowing features: A

-19-TRANSMIT - RECEIVE TESTS (Using a power supply)Before completing the assembly, we will want to power up and test the Transmit-Receive Section. See

-20-c) Check transistors Q2, Q3, Q4 and Q5. Be sure that they are the proper type and that the emitter, baseand collector leads are in the correct hol

DIALERCircuit Description - The main elements of the Dialer Section arethe keyboard and the dialer IC HM9102. These two componentsperform all of the f

Figure HIdentify the pulse/tone switch asshown in Figure Ha. The pulse/toneswitch is mounted on the copperside of the PC board. Insert theswitch tabs

KEYBOARD ASSEMBLYInsert the ribbon cable through the holes inthe main PC board and solder as shown inFigure 6-16.Insert the ribbon cable through the h

DIALER TEST (Using a 9 volt battery)1. Be sure that the telephone cord is connected to your modular jack. Be sure that the telephone is off thehook (h

DIALER TEST (Using a power supply)1. With the power supply OFF, reconnect the test circuit as shown in Figure 6-12. Position the PC board sothat the h

FINAL ASSEMBLYSee Figure 6-19. Place the PC board on the top case so that the ringer switch is in the ringer switch hole,the tone/pulse switch is in t

FINAL TESTS (Using a 48VDC power supply)Test Equipment Needed (not provided):• 48VDC power supply • Variac (only for ringer test)• 1kΩ 5W resistor • I

10. To measure the input voltage to the telephone, connect the positive voltmeter lead to the negative terminalof the power supply and the negative vo

The Rotary Dial TelephoneA simplified schematic diagram of thetraditional rotary dial telephone is shown inFigure 3-2. The major parts of this telepho

2. Set the voltmeter to read 50VAC. Put the variac ON and adjust it to obtain 50VAC on the voltmeter.3. Put the ringer switch ON. Plug in the telephon

SECTION 7 - INSTALLING THE TELEPHONEMounting the CradleSelect a convenient place for your phone. Place the telephone cradle against thewall and mark t

If present, connect the black and yellow wiresin the same way. If these are missing, merelyconnect the black and yellow spade lugs to the“B” and “Y” s

-32-SCHEMATIC DIAGRAM

-33-QUIZMark the box next to the letter with the correct answer. Answers on next page.1) The ringer in the traditional rotary dial telephone utilizes

-34-GLOSSARYDTMF Dual Tone Multifrequency.Electret Microphone A microphone made up of a capacitor with a dielectric that holds a permanentelectric cha

Tone DialerTone dialing is accomplished with a keyboard of 12keys arranged in 4 rows and 3 columns. As seen inFigure 3-4, low frequencies of 697, 770,

-4-ReceiverThere are several different types of receivers. In principle, theywork the same as the speakers in your radio and TV. The speakerconsists o

-5-SECTION 4 - PARTS LISTIf any parts are missing or damaged, see instructor or bookstore. DO NOT contact your place of purchase asthey will not be ab

-6-* BAG 4 *QTY DESCRIPTION PART #1 Switch SPDT (Hook) (S2) 5411082 Switch SPDT (S1, S3) 5411092 Screw 1/4” (Keyboard) 6422372 Screw 5/8” (Case) 64247

-7-PARTS IDENTIFICATIONDiodesResistorCapacitorsTransistorEpoxyGlassBAG 2ElectrolyticDiscMylarBAG 3Integrated Circuit (IC) IC SocketResonatorNeon BulbB

-8-IDENTIFYING RESISTOR VALUESUse the following information as a guide in properly identifying the value of resistors.BAND 11st DigitColor DigitBlack