TELEPHONE LINE ANALYZER KIT MODEL TWT-1K Assembly and Instruction Manual Elenco Electronics, Inc. Copyright © 2001 Elenco Electronics, Inc.
PARTS LIST RESISTORS Qty. 1 1 7 Symbol R9 R4 R1-R3, R5-R8 Value 120W 5% 1/2W 560W 5% 1/2W 680W 5% 1/2W Color Code brown-red-brown-gold green-blue-brown-gold blue-gray-brown-gold Part # 131201 135601 136801 SEMICONDUCTOR Qty. 4 Symbol D1-D4 Description Bi-Color (Red/Green) LED (Light Emitting Diode) Part # 350007 MISCELLANEOUS Qty. 1 1 1 1 1 Description PC Board Solder Battery Snap Top Case Bottom Case Part # 519032 551135 590098 623124IC 623219IC Qty.
SPECIFICATIONS CATEGORY OF WALL PLATE JACKS • Standard RJ-11 modular jacks with active telephone lines (one or two lines). • Standard RJ-45 modular jacks with active telephone lines (one to four lines) for configuration EIA/TIA 568A or B, AT&T 258A, token ring, or 10 BASE-T. MULTIPLY FUNCTIONS • Polarity identify (straight or reverse) cable and/or pairs. • Open or short wiring test. INTRODUCTION The TWT-1 Telephone Line Analyzer has been designed to test telephone wall plates using RJ-11 and RJ-45 jacks.
HOW IT WORKS WIRING CONFIGURATION for RJ-11 JACKS The TWT-1 Analyzer is easy to use in quick testing of the telephone lines. It will indicate by the color of the LED if the wiring is correct, reversed or if it is not working at all. Figure 6 RJ-11-2 1 6 Typical color scheme for one or two lines.
WIRING CONFIGURATIONS FOR RJ-45 JACKS Figure 10 Typical color scheme for eight lines. The RJ-45 indicates an 8-wire plug or jack. There are many standards which dictate which wire pairs connect to which pins on a plug or jack. Some of these standards are listed below.
CONSTRUCTION Introduction Assembly of your TWT-1K Telephone Line Analyzer 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. Above all, take your time and follow these easy step-bystep instructions.
PC BOARD ASSEMBLY Solder the following parts to the PC board. Figure A R8 - 680W 5% ½W Resistor (blue-gray-brown-gold) (see Figure A) Mount the resistor flat against the PC board as shown. Solder and cut off the excess leads.
PC BOARD ASSEMBLY Solder the following parts to the PC board. 1 2 3 4 - Black - Red - Green - Yellow Figure C 1 4 PC Board Plug 1. Insert the cable with RJ-11 plug into the hole in the PC board as shown, noting the direction of the plug. 2. Insert the four colored wires into the corresponding holes in the PC board as shown. 3. Tug the cable down to the position shown. 4. Turn the PC board over. Solder the wires and cut off the excess leads.
TESTING AND TROUBLESHOOTING 1. One of the most frequently occurring problems is poor solder connections. a) Tug slightly on all parts to make sure that they are indeed soldered. b) All solder connections should be shiny. Resolder any that are not. c) Solder should flow into a smooth puddle rather than a round ball. Resolder any connection that has formed into a ball.
FINAL ASSEMBLY Assemble the case as shown. Screws Figure E Top Case Assembled PC Board Bottom Case Peel the backing off of the label and stick the label onto the top case.
USING THE TELEPHONE LINE ANALYZER ON RJ-11 JACKS Now that we have completed and tested the telephone line analyzer, you are ready to test wall plates that have RJ-11 jacks with one or two lines. If wall plates with RJ-11 are not available, then you should use the telephone line simulator Model TT-250. It will provide all of the conditions that would be found in the field and are illustrated below.
USING THE TELEPHONE LINE ANALYZER ON RJ-45 JACKS When testing an RJ-45 jack and there are two lines coming into the jack, two LEDs will be lit. If you have four lines coming into the jack, four LEDs will be lit. If wall plates with RJ-45 jacks are not available, then you should use the telephone line simulator Model TT-250. It will provide all of the conditions that would be found in the field and are illustrated below. Before testing, you should know which wiring standard is coming into the jack.
LEARNING TO USE THE TWT-1 TELEPHONE LINE SIMULATOR MODEL TT-250 Elenco Electronics has developed a telephone line simulator, Model TT-250, for the TWT-1 Telephone Line Analyzer. It will simulate the most common field situations. It provides an RJ-11 jack for one or two line testing, straight and reversed wiring and simulates opens. It also provides an RJ-45 jack for one, two, three, or four line testing, straight and reversed wiring and simulates opens.
QUIZ 1. Solder is comprised of what two materials? A. Gold and copper B. Tin and lead C. Zinc and copper D. Lead and aluminum 6. Solder wick is used to . . . A. remove solder. B. solder in small parts. C. cleaning the soldering iron tip. D. removing flux. 2. What type of flux should be used in electronics? A. Chloride B. Organic C. Rosin D. Corrosive 7. A cold solder joint is caused by . . . A. a solder bridge. B. using 60/40 solder. C. insufficient heat. D. acid core solder. 3.
TELECOMMUNICATION EQUIPMENT & KITS Telephone Line Simulator Telephone Line Analyzer Model TT-250 Model TT-400 A telephone line analyzer that provides fast indication of telephone line polarity, ring and line voltage levels, condition of phone line from user’s telephone to central telephone office - also can check basic telephone functions and condition of telephone line cord. Test and demonstrate the usage of the TWT-1 Telephone Line Analyzer. Simulate typical telephone line problems.
WORD GLOSSARY 42A Block A terminal block that provides telephone line junctions. Anode The positive terminal of a diode or other polarized component. Bi-Color LED A component that combines two dice of different colors upon a single substrate or lead-frame carrier. Cathode The negative terminal of a diode or other electronic component. Current Transport of electrons through a conductor and measured in amps.
