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Chattanooga Group Intelect Legend Series Service Manual
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Chattanooga Group Intelect Legend Series Service Manual

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CHATTANOOGA
GROUP INC.
®
Intelect
Legend Series
Service Manual
P.N. 78343 Rev. A

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Summary of Contents for Chattanooga Group Intelect Legend Series

  • Page 1 CHATTANOOGA GROUP INC. ® Intelect Legend Series Service Manual P.N. 78343 Rev. A...
  • Page 2 CHATTANOOGA GROUP INC. I NEED TO KNOW . . . Go to page Warranty Information ......3 How the unit works........6 What might be wrong with my unit ..25 What the error messages mean ...26 Special Key Combinations....27 How to calibrate the unit .......38 How to open the unit .......9 How the boards interconnect ....36 Where the connectors are.....11...
  • Page 3 Group, Inc. Any modifications or repairs performed by unauthorized centers or groups will void this warranty. To participate in warranty coverage, the product’s warranty registration card (included with the product) must be filled out and returned to the Chattanooga Group, Inc. by the original owner within 10 business days of purchase.
  • Page 4 Important ! The specifications and information put forth in this manual were in effect at the time of publication. However, owing to Chattanooga Group’s policy of continuous improvement, changes to these may be made at any time without obligation on the part of Chattanooga Group, Inc.
  • Page 5 CAUTION: Do not operate the Intelect Legend Unit when connected to any unit other than Chattanooga Group, Inc., devices. Do not operate the unit in an environment of short-wave diathermy use. WARNING: Federal Law restricts this device to sale by, or on the order of, a physician or licensed practitioner.
  • Page 6 CHATTANOOGA GROUP INC. Theory of Operation Overview To better understand the details in the following paragraphs, a quick look at the operation of the entire system is helpful. The unit is powered by a desktop switching power supply which accepts 100-240VAC and delivers a regulated 12-16VDC. Each board within the unit has its own local regulation as required by the particular board functions.
  • Page 7 CHATTANOOGA GROUP INC. JP3 supplies power to the fan and JP6 is for the beeper. The Stim Board The Stim Board’s function is to generate various output waveforms under the direction of the Control Board. Due to the variety of waveforms commonly used in electrotherapy, there are different waveform generators on the board, all controlled by a common Digital Signal Processor (DSP).
  • Page 8 CHATTANOOGA GROUP INC. The Ultrasound Applicator The Ultrasound Applicator comes in several models, depending on the surface area of the transducer and the shape of the face of the transducer. The circuitry within all of them is the same. Connection to the Applicator is through a triaxial cable. The center conductor carries the drive to the transducer while the inner shield is the return.
  • Page 9 CHATTANOOGA GROUP INC. General Service Procedures Preventing damage to the case The plastic case of the Intelect units is quite durable, as are the membrane switch overlays. To remove the screws and open the case for servicing it will be necessary to place the unit upside down. Be sure the work surface is covered so that the unit isn’t scratched.
  • Page 10 CHATTANOOGA GROUP INC. Signal Lists ® Intelect Ultrasound Control Board Below is a simple drawing showing the approximate locations of the connectors and the position of pin 1 on each connector. Legend US Control PIN 1 PIN 1 PIN 1 PIN 1 PIN 1 PIN 1...
  • Page 11 CHATTANOOGA GROUP INC. US Control Board Pin # Signal Name Type Unregulated Power Power +8 to +18VDC, Current Limited Buzzer On Output Open Collector, Active US Control Board Pin # Signal Name Type Unregulated DC Power 8-18VDC Fan On Output Open Collector, Active US Control Board Pin #...
  • Page 12 CHATTANOOGA GROUP INC. US Board Enable Output Digital Active Low Ground US Read/Write Output Digital Active Low Ground No Connection Ground US Power Down 1 Output Digital Ground US Power Down 2 Output Digital US Control Board Pin # Signal Name Type Ground Switch 0...
  • Page 13 CHATTANOOGA GROUP INC. ® Intelect Legend Stim Control Board Below is a simple drawing showing the approximate locations of the connectors and the position of pin 1 on each connector. Below are tables showing the signals for each connector on the Control Board.
  • Page 14 CHATTANOOGA GROUP INC. Stim Control Board Pin # Signal Name Type Unregulated Power Power +8 to +18VDC, Current Limited Buzzer On Output Open Collector, Active Stim Control Board Pin # Signal Name Type Ground Ground Power +5 Volts LCD Bias Power -6 to -18 VDC, varies with contrast...
  • Page 15 CHATTANOOGA GROUP INC. Interrupt Address Line 0 Output Digital Ground Address Line 1 Output Digital Dual Port RAM Busy Input Digital Active Low Address Line 2 Output Digital Ground Address Line 3 Output Digital Dual Port RAM Output Digital Read/Write Address Line 4 Output Digital...
  • Page 16 CHATTANOOGA GROUP INC. Stim Control Board Pin # Signal Name Type Backlight Power Power Approx. 100VAC, Approx. 400Hz Ground JP10 Stim Control Board Pin # Signal Name Type Ground Switch 0 Input Digital Active Low Switch 1 Input Digital Active Low Switch 2 Input Digital Active Low...
  • Page 17 CHATTANOOGA GROUP INC. Ultrasound Generator Board Below is a simple drawing showing the approximate locations of the connectors and the position of pin 1 on each connector. PIN 1 PIN 1 Ultrasound Generator Board PIN 1 Below are tables showing the signals for each connector on the Control Board.
  • Page 18 CHATTANOOGA GROUP INC. US Address Line 0 Input Digital Ground US Address Line 1 Input Digital Ground No Connection Ground No Connection Ground No Connection Ground Input Digital Active Low US Strobe Ground US Board Enable Input Digital Active Low Ground US Read/Write Input...
  • Page 19 CHATTANOOGA GROUP INC. Stim Board Below is a simple drawing showing the approximate locations of the connectors and the position of pin 1 on each connector. Jumper for Ch. 1&2 Jumper for Ch. 3&4 Stim Board PIN 1 PIN 1 PIN 1 PIN 1 PIN 1...
  • Page 20 CHATTANOOGA GROUP INC. Ground Address Line 7 Input Digital Dual Port RAM Chip Input Digital Active Low Enable Board 1 Address Line 8 Input Digital Dual Port RAM Chip Active Low Enable Board 2 Address Line 9 Input Digital Ground Patient Disconnect Input Digital...
  • Page 21 CHATTANOOGA GROUP INC. Stim Board Pin # Signal Name Type Power Input Input 8-18 VDC Power Input Input 8-18 VDC Ground Ground Stim Board Pin # Signal Name Type Hi-Volt Probe Output Output Stim Output, 0-500V Pulses Hi-Volt Probe Pot Top Output Not Used Hi-Volt Probe Pot...
  • Page 22 CHATTANOOGA GROUP INC. No Connection Channel 1 Output Low Not Used ® Innovation starts here Intelect Legend Series Service Manual...

  • Page 23: Table Of Contents

    CHATTANOOGA GROUP INC. My Problem Is With . . . Go to page Error Messages ........26 Special Key Combinations....27 Power-On ..........28 No Output ..........29 Head Detection and ......30 Data Reading Applicator Overheating ......31 Head Warming........32 Display ............33 No Display, Garbled Display, Black Display Settings Return to Defaults after..34 adjustments...
  • Page 24 CHATTANOOGA GROUP INC. Intelect Legend Stim Error Messages Explained Below is a list of the messages displayed on the LCD screen when an error is detected, as well as a brief explanation of the source of the message. “Channels Needed for This Mode are Busy” Either no channels are open to run a new signal, or the dedicated channel for HiVolt is already being used.

  • Page 25: Special Key Combinations

    CHATTANOOGA GROUP INC. Special Key Combinations ® Intelect Legend Stim Here is a list of the key combinations available for adjusting LCD screen contrast and saving presets. Adjust the Contrast UP Channel 1 & Intensity Up Adjust the Contrast DOWN Channel 1 &...
  • Page 26 CHATTANOOGA GROUP INC. Problems Powering Up The Unit If there is an indicator on the power supply, does it turn off when you turn the power switch on? (If there is no indicator use a voltmeter to monitor the power supply output.) Yes - Try another power supply.
  • Page 27 If it is low, then follow the Applicator Calibration Procedure in this manual. If there is absolutely no output, try another applicator. Any Chattanooga Group ® applicator from an Intelect Legend or CPS unit that has the same connector will work.

  • Page 28: Applicator Overheating

    CHATTANOOGA GROUP INC. Applicator Detection and Data Reading Problems To help diagnose these problems, keep in mind how the unit operates. The unit determines whether an applicator is connected based on the voltage from the thermistor in the applicator. If the applicator is unplugged, the voltage rises to 5V from its normal 2-3V.

  • Page 29: Head Warming

    CHATTANOOGA GROUP INC. Head Warming Problems Usually an explanation of exactly how this feature works will help you determine if the problem is due to the Applicator or the Ultrasound Generator Board. When Head Warming is selected, the ultrasound output is turned on at half the maximum output for the head size, and the frequency is set to 3 MHz.

  • Page 30: Settings Return To Defaults After

    CHATTANOOGA GROUP INC. Yes - Are there other signs that the unit is functioning such as the fan runs when a treatment is selected and the intensity increased? If not, check the items in the Power-On section. Otherwise, try adjusting the contrast. If that doesn’t correct the problem, it could be in either the LCD or the Control Board.
  • Page 31 CHATTANOOGA GROUP INC. My Problem Isn’t Described Here ! While we have tried to make this manual as complete as possible and include as much troubleshooting help as we can, there will still be some problems which haven’t been foreseen or are so rare as to not be included. Some tips: •Always begin by reading the Theory of Operation and review the Signal Lists.
  • Page 32 CHATTANOOGA GROUP INC. Wiring Diagrams ® These pages have the wiring diagrams for the Intelect Legend Ultrasound ® and Intelect Legend Stim units. Refer to them for connection information and part numbers. ® Intelect Legend Ultrasound ® Innovation starts here Intelect Legend Series Service Manual...
  • Page 33 CHATTANOOGA GROUP INC. ® Intelect Legend Stim ® Innovation starts here Intelect Legend Series Service Manual...
  • Page 34 CHATTANOOGA GROUP INC. Calibration Procedures ® These calibration procedures apply to calibration of the Intelect Legend ® Ultrasound and Intelect Legend Stim units. Following it is a calibration procedure for the ultrasound applicators. ® Intelect Legend Stim Calibration Procedure Equipment Required: Oscilloscope Scope Probe (X10) (2) 510-ohm Loads...
  • Page 35 CHATTANOOGA GROUP INC. 2. Premod: With the oscilloscope probe on channel 2, press Channel 2 button. Press Premod and observe: Channel 2 Premod. Adjust output with Intensity arrow to 50ma and press Start. Main screen should display Channel 2 Premod with timer counting down from 15:00 and 50ma as output with Ch1 - Avail below.
  • Page 36 CHATTANOOGA GROUP INC. waveform on both channels is similar to that shown below using the oscilloscope. Russian Waveform; ‘scope set to 50V/div, 5mSec/div Press pause to pause the operation and then press the Up and Down Time buttons to confirm that the time changes. Set the treatment time to 1 minute and push Start.
  • Page 37 CHATTANOOGA GROUP INC. 5. Press DUTY CYCLE until Continuous is illuminated, noting that each LED is functioning. Use the INTENSITY up button to set the output to 2.0W/cm The fan should begin running. Press START. By applying a small amount of water to the transducer, verify that there is ultrasound output.
  • Page 38 CHATTANOOGA GROUP INC. 10. Push the START button. The unit will hold the settings in memory. The display will change to CAL2. 11. If you are satisfied with the calibration, push START. 12. The unit will beep to indicate that the new calibration values have been stored in the applicator.
  • Page 39 CHATTANOOGA GROUP INC. Technical Specifications ® Listed here are the specifications for the Intelect Legend Ultrasound. Dimensions: 8.25” x 11” x 2.5” Weight: 2 lb. Applicators: 2, 5, & 10 cm² Power: 90V-264V, 47-63Hz 2 cm² Applicator Frequency (Mhz): 1.0 MHz, 3.3 MHz (all +/- 5%) Power (watts): 0.2 watt to 4 watts ERA (cm²):...
  • Page 40 CHATTANOOGA GROUP INC. Ultrasonic Power: 10 cm² crystal at 1.0 MHz: Variable from 1 watt to 20 watts 10 cm² crystal at 3.3 MHz: Variable from 1 watt to 10 watts 5 cm² crystal: Variable from 0.4 watt to 10 watts 2 cm²...
  • Page 41 CHATTANOOGA GROUP INC. ® Listed here are the specifications for the Intelect Legend Stim. Interferential Output Channels: 1 & 2 Amplitude: 0-50 mA RMS into a 500 ohm load Current Limit: 50 mA RMS Voltage (max.): 200 Volts Peak to Peak Carrier Frequency: 5000 Hz Beat Frequencies: 0-200 Hz Premod...
  • Page 42 Parts List ® The following is a list of replaceable parts for the Intelect Legend ® Ultrasound and Intelect Legend Stim units with their Chattanooga Group part numbers. 78211 Intelect Ultrasound Control Board Assembly 78811 Intelect Stim Control Board Assembly...