Elenco Electronics FUN-755 User manual

Spring
Lever
Cradle Assembly
Brackets
Screw Used
(shown actual size)
2.6 x 7mm
X2
Plate
Big Washers
Screw Used
(shown actual size)
2.6 x 6mm Screws
with Washer
2.6 x 6mm with washer
X2
Input Modular Jack
Buzzer Pad
Remove
Backings
Modular Jack
PC Board
Buzzer
Screw Used
(shown actual size)
2.6 x 6mm Screws
2.6 x 6mm
X3
Index Label Shield
Index Label
Screws Used
(shown actual size)
Hook Switch
NOTE: Be
sure that the
Lever is above the
Hook Switch as
shown.
3 x 7mm Screws
3 x 7mm
X4
Lever
Decorative Piece
Push Button Panel
NOTE: Push
the Push Button
Panel up and
snap it into
position.
2.6 x 10mm Screws
Screws Used
(shown actual size)
2.6 x 10mm
X2
Handset Assembly
Speaker Pad
Remove
Backing
Speaker
Speaker Pad
Remove
Backing
Mute Button
Keypad Contact
Number
Button
Flash Button
Redial Button
321
654
987
#0*
Back View
Use this diagram as a
guide when installing
the number buttons.
NOTE: Make
sure that the angle
on the Flash, Redial,
and Mute buttons are
in the same
direction shown.
Keypad PC Board
Rubber Microphone Cup
Microphone
Screw Used
(shown actual size)
2.6 x 6mm Screws
2.6 x 6mm Screws
2.6 x 6mm
X6
2
5
3
4
Modular Jack
Wiring/Tubing Assembly
NOTE: Follow
these steps for
wiring the speaker
wires to the PC
board wires.
1
Screw Used
(shown actual size)
2.6 x 14mm Screws
Cut Tubing
Slide
Tubing
onto wire.
Twist
wires
together.
Slide
Tubing over
the twisted
wires.
2.6 x 14mm X2
Wiring/Tubing Assembly
Coiled Cord
NOTE: When
snapping the receiver
cover on, start from the
back.
It may take a couple
attempts to attach
the two pieces.
Phone Number Shield
Phone Number
Label
2.6 x 14mm
Screws
Before the
Final
Assembly
Refer to Page 6 and perform the
Transmit/Receive & DialTests.
Screw Used
(shown actual size)
2.6 x 14mm X2
Final Assembly
Foam Feet
Bottom View
Remove
Backing
THIS UNIT COMPLIES WITH
PART 68 FCC RULES FCC NO.
GXA1CHN-74412-TE-E REN NO. 1.3B
USE STRANDARD JACK USOC RJ11C
FCC Label
Line Cord
Copyright © 2001 Elenco Electronics, Inc. All Rights Reserved. • 150W. Carpenter Ave. •Wheeling, IL 60090 • [phone] Fax: [phone] • e-mail: [email protected] • Web Site: http://www.elenco.com
You have now completed the assembly of the FUN-755Telephone Kit. Refer to HOWTO USE IT on
the other side. If the phone does not work, refer to TROUBLESHOOTING .
There are many other projects: Cassette Player, RC Car, Talking Clocks, Electronic
Keyboard, etc. Ask your store about these projects or call at [phone].
2.6 x 7mm Screws
Contact Elenco Electronics if you have any problems. Actual colors may vary from those shown here.
ASSEMBLY INSTRUCTIONS
Side View
Top View
Hook
Switch
Lever
Bend LED Up
1/8”
Use scissors
to cut off 1/8”.
FUN-755 FUN-755
BeforeYou
START . . .
Refer to Page 5 and
perform the Ring
Test.
Long Part of Spring
Short Part of Spring
NOTE: Remove any
burrs on the buttons
before installing them into
the Push Button Panel.
2
Remove Burrs
NOTE: This
may take a
couple attempts
to attach the two
pieces.

The FUN-755 is a push-button pulse/tone dial electronic telephone kit that you put
together.The kit is mechanically and electronically assembled by the user with no
soldering required.
In addition to the experience of building the unit, there is also an overview of how
to use it, an electronic road map showing the electrical circuits, and a
troubleshooting section in case of problems.
The Model FUN-755 is equipped with the following features:
1.Tone/pulse switch
2. Mute button
3. Automatic redial last number
4. Ringer ON/OFF switch
5. Neon bulbs flash as telephone is ringing
6. Lighted dial key pad
7. Flash button
8. Desk top or wall mounting
Recommended for ages 8 and up. It takes about 3 hours to build.
YOU WILL NEED:
• 9V battery (if you want to test while building).
• Scissors, sharp knife, or a pair of flush cutting diagonal pliers
• Screwdriver phillips medium size
TELEPHONE KIT
Manufactured by
Elenco Electronics, Inc.
150 W. Carpenter Avenue
Wheeling, IL 60090
Copyright © 2001 Elenco Electronics, Inc.
WHAT IT IS ELECTRONIC ROAD MAP
FUN-755
2
753063
WARNING:
CHOKING HAZARD - Small Parts.
Not for children under 5 years.
Contains functional sharp edges
and points.
!!
TRANSMIT - RECEIVE TEST
Connect the telephone to the test cable with the 9V battery connected to it using telephone
line cable.
1. Put your ear to the speaker and depress and release the hook switch.
You do not hear the click, then:
a. Check the right assembly stand for test.
b.
Check assembly cradle set. Is the lever located over the hook switch? (see Step 4 on
the other side).
c. Check that the wires have a good connection from PC board to the speaker.
2. Put your ear to the speaker and gently tap or scratch the case where the microphone
is located. You should hear the tapping on the speaker.
3. As you are tapping, push and hold the mute button down. You should not hear the
tapping sound.
The 2nd and 3rd test fail, then:
a. Check the microphone and wires.
b. Check if the mute button is installed correctly.
DIAL TEST
Continue using the test cable for this test.
1. Switch the P-T (Pulse/Tone) Switch to P-position. Depress and release the hook switch
and push the "1" button. You should hear a click and see the green LEDs blink. Push
the "2" button, you should hear two clicks and see the green LEDs blink. Press each of
the remaining numbered buttons from "3" to "0" to verify that each is operational. Press
the yellow "FLASH" button. You should see the green LEDs blink.
Dial a telephone number. Depress and release the hook switch and push the "REDIAL"
button. The number should redial and the green LEDs should blink.
Above tests fail, then:
a. Check that the buttons are installed correctly.
b. Check the assembly of the push-button panel, yellow buttons ("REDIAL" and
"FLASH"), keypad contact and the PC boards.
c. Check the P-T switch
2. Switch the P-T switch to T- position. Depress and release the hook switch and push
button "1". You should hear a click. Push button "2". You should hear again a click.
Press each of the remaining numbered buttons from "1" to "0" and buttons "*" and "#"
to verify that each is operational.
Test fails, then:
a. Check the P-T switch
Remove the test cable from the telephone line. Return to Step 10 of the Assembly
Instructions.
TRANSMIT - RECEIVE & DIALER TESTS HOW TO USE IT
Plug the telephone line into a modular jack connected to a telephone line.
1. Tone/Pulse Dialing - If your home is equipped with touch tone dialing service,
set the tone/pulse switch to tone position. If your home is equipped with rotary
dialing service, set the tone/pulse switch to pulse position.
2. Ringer ON/OFF Switch - The ringer can be turned OFF by setting the
RINGER ON/OFF SWITCH TO OFF.
3. To Place and Receive Calls - Lift handset to place or receive calls. Upon
completion, return handset to cradle, or press the hook switch once if you want
to make another call.
4. Last Number Redial - Whether or not you complete a call, the number dialed
is retained in memory until a new number is dialed. Just press to get new dial
tone then redial button. Your telephone remembers the last number dialed even
overnight. If you do not want anyone to know which number you dialed last,
pick up the phone and press any number, and hang up.
5. Mute Button - Allows you to hear the other party without them hearing you. To
use the MUTE function, press the mute button. Release the button to return to
normal. If your telephone is wall mounted to temporarily rest the handset
without hanging up, during a conversation, place on topTAB.
6. Flash Button - When you are finished with a call and wish to make another
press the FLASH BUTTON to obtain a dial tone. If you have CALL WAITING
(a custom calling feature) and wish to access a second call, press the FLASH
BUTTON. Press the FLASH BUTTON again to return to the first call.
7. Your telephone has neon bulbs to give a visual indication that it is ringing. The
LEDs illuminate the dial key pad.
TROUBLESHOOTING
Symptom: The telephone doesn’t work (no ring or dial tone).
•Check for loose telephone line. Try another telephone line.
•Try a different phone in the jack. If the problem persists, the fault is not in
the phone.
Symptom: No ring. No visual indication that the phone is ringing.
•Try a different phone. If the problem still exists, the fault is not in the
phone.
Symptom: No ring. Visual indication that the phone is ringing.
•Check the ringer switch. Is it set to OFF?
Symptom: No dial tone.
•Are the line cord plugs ends (to the jack and phone) pushed in firmly until
they click?
•Wiggle the coil cord. Does it fit firmly?
•Test the phone in a different wall jack.
•Plug a different phone in the wall jack and check for a dial tone.
Symptom: Have a dial tone, but can’t dial out.
•Are you in a rotary area? Move the tone/pulse switch to pulse.
•Try a different phone in the jack. If the problem persists, the fault is not in
your phone.
Symptom: Some of the wires break off.
•Solder them if you have the necessary tools and know how to do it.
•Contact Elenco Electronics.
If you need additional assistance, contact Elenco.
34
678
(SCHEMATIC DIAGRAM)
Elenco Electronics, Inc.
150 W. Carpenter Avenue http://www.elenco.com
Wheeling, IL 60090 e-mail: [email protected]
[phone] Fax:[phone]
HOW IT WORKS
The telephone was invented in 1876. The primary purpose of the telephone is to
transmit and receive voice signals allowing two people with telephones to
communicate with each other. To be of practical value, the telephone must be
connected to a switching. Each subscriber telephone is connected to the
telephone company's Central Office (CO) by two wires referred to as the "Local
Loop." A simplified diagram of this connection is shown in the Block Diagram.
The TIP and RING designation of the "+" and "--" leads come from the days of the
manual switchboard. The tip of the plug the operator use to connect telephones
carried the "+" lead and the ring immediately behind the tip carried the "--" lead.
The central office provides 48 Volts DC to operate telephones. When a telephone
is on the hook, no current flows, and approximately 48 VDC can be measured at
the Tip and Ring terminals on the telephone. A capacitor in series with the ringer
prevents DC current flow through the ringer. When the handset is picked up, the
hook switch connects the voice circuit to the line, and DC current flows from the CO
battery, through the wires and the telephone. Due to the resistance in the wires and
CO equipment, the voltage at the telephone will drop to about 6 to 12 Volts.
The current flow is detected by a current sensor in the CO, and the switching and
control system (from here on we'll just call it "the system") responds by sending a
dial tone to the telephone. The system then waits for dialing to begin. When
dialing is complete, the CO checks to see if the dialed telephone is busy; if the
dialed telephone is on hook (the current sensor on the dialed telephone line
provides this information), then a 90 Volt AC ringing signal is sent to the dialed
telephone and the ringer will ring, signaling that someone is calling. When the
handset is picked up, DC current will be drawn from the CO battery, signaling the
system that the called party has answered. The system stops providing 90 VAC
ringing voltage and connects the two phone lines together, letting the parties talk.
As you can imagine, the system is not simple. Along with the tasks mentioned
above, it must generate busy signals, keep track of the length of calls for billing
purposes, route calls to other COs, and connect voice recordings to advise you of
problems in completing calls.
The ringer circuit is connected directly across the Tip and Ring inputs. The
capacitor blocks the 48 VDC that is present on the inputs when the phone is on
the hook. To signal an incoming call, the Central Office places a 90 VAC 20Hz
signal on top of the 48 VDC. A special circuit oscillates the frequency at about
3kHz. The buzzing sound is thus produced by the buzzer changing dimensions
at 3kHz. During the positive portion of the 20Hz ringing signal, the three neon
bulbs give a visual indication of the incoming call.
When the hook switch is not depressed the telephone is ready to transmit and
receive. The rectifier protects the integrated circuit (IC) and other components
that may be damaged by a reversal of polarity transmission begins when you
speak into the microphone. The main elements of the dialer are the keyboard and
the dialer IC.
PARTS LIST & IDENTIFICATION
Contact Elenco Electronics if any parts are missing or damaged. DO NOTcontact your place of purchase as they will not be able to help you.
Spring
6FUN75516
Bracket Right
6FUN75515
Bracket Left
6FUN75514
Cradle Case
Front
6FUN75501
Screw
2.6 x 7mm
Phillips
6FUN75518
STEP 1
PARTS
Lever
6FUN75517
Screw
2.6 x 6mm
w/washer
6FUN75541
Big Washer
6FUN75513
Plate
6FUN75511
STEP 2
PARTS
Cradle Case
Back
6FUN75502
Buzzer Pad
780125
Battery Snap
590098
Screw
2.6 x 6mm
Phillips
6FUN75518
Resistor
10kΩ5% 1/2W
(brown-black-
orange-gold)
151001
Test Jack
621019
STEP 3
PARTS
PC Board
(with line and
cradle jacks)
6FUN75504
Straight
Telephone Line
6FUN75503
Tubing #14 1.5”
890014
STEP 4
PARTS
Index Label
6FUN75507
Screw
3 x 7mm Phillips
6FUN75518
Index Label
Shield
6FUN75508
Screw
2.6 x 10mm
Phillips
6FUN75541
Handset Case
Front
6FUN75520A
Push Button
Panel
6FUN75524
STEP 5
PARTS
Decorative Piece
6FUN75526
Keypad Buttons
6FUN75525
Flash and Redial
Buttons
6FUN75528
Mute Button
6FUN75527
Speaker
(with 2 wires)
6FUN75536
Speaker Pad
Blue Double
6FUN75531A
STEP 6
PARTS
Keypad Contact
6FUN75529
STEP 7
PARTS
PC Boards
6FUN75523A
Screw
2.6 x 6mm
Phillips
6FUN75518
Rubber
Microphone Cup
6FUN75534
STEP 8
PARTS
Screw
2.6 x 14mm
Phillips
6FUN75539
Tubing #14 1.5”
890014
STEP 9
PARTS
Handset Case
Back
6FUN75521A
Coiled Cord
6FUN75522A
Phone Number
Shield
6FUN75533
Foam Feet
6FUN75509
FCC Label
6FUN75510
Screw 2.6 x 14mm
Phillips
6FUN75539
STEP 10
PARTS
Phone Number
Label
6FUN75532
910 11 12
X2
X2
X2
X3
X4
X2
X2
X6
THIS UNIT COMPLIES WITH
PART 68 FCC RULES FCC NO.
GXA1CHN-74412-TE-E REN NO. 1.3B
USE STRANDARD JACK USOC RJ11C X4
X2
X2
For all the tests you need to make a test cable
using a 9V battery snap, a test jack, and a 9V
battery.
First check:
a. If your kit has a red wire on the input jack
going from point T1 (on Ringer PCB) and
green/black wire going from point T2, make
the test cable as shown. See Step 8 on the
other side for Wiring/Tubing Assembly
instructions.
- OR -
b. If your kit has a red wire on the input jack going from point T2 (on
Ringer PCB) and a green/black wire going from pointT1, reverse
the wire connections on the test jack. See Step 8 on the other
side for Wiring/Tubing Assembly instructions.
Plug the telephone line into the input jack of the PC board and the test
cable jack as shown. Next, plug the 9V battery into the battery snap.
No tone should be heard. Connect the 10kΩresistor to the leads of R2 and D1 (see figure).
You should hear a tone from the buzzer when the resistor is connected the two leads. Now
remove the resistor and the tone will stop.
Ringer test fails, then:
a. Check that the battery is connected with the right polarity to the test cable.
b. Check your 10kΩresistor.
c. Check wires from buzzer and jack to PC board. Be sure that none of these wires
have broken off.
d. Check the telephone line for a good connection.
Remove the test cable from the ringer PC board. Return to Step 3 of the Assembly
Instructions.
RING TEST
(Black)
Green
Red
Red
Black
(Green)
3/4” Tube
Battery
Snap Test
Jack
5
Test Cable Assembly
T1
T2
SW2 OFF
ON
Input Jack
Test Cable
Straight Telephone Line
9V
Battery
Solder Side
of PC Board Test Jack
Ringer
PC Board 10kΩResistor