Welch Allyn GSI 38 Service Manual
  1. Manuals
  2. Brands
  3. Welch Allyn Manuals
  4. Measuring Instruments
  5. GSI 38
  6. Service manual
Welch Allyn GSI 38 Service Manual

Welch Allyn GSI 38 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GSI 38 and is the answer not in the manual?

Questions and answers

Related Manuals for Welch Allyn GSI 38

Summary of Contents for Welch Allyn GSI 38

  • Page 2: Warranty

    GSI 38 power plug and an AC outlet or extension cord. Additionally, those GSI 38 Auto Tymps that are equipped with power transformers, use a specific transformer (8000-0260, 800-0261, or 8000-0262) which should not be interchanged with any other transformer or supply.

  • Page 3: Product Specification

    PRODUCT SPECIFICATION...
  • Page 4 Also a test cavity assembly is provided. INSTRUCTION MANUAL The GSI 38 is supplied with an instruction manual which meets the requirements of the applicable standards.
  • Page 5 STANDARDS ANSI S3.39 - 1987 Aural Acoustic Impedance and Admittance Standard Type 3 (Middle Ear) ANSI S3.6 - 1989 Audiometric Standard Type 4 (Audiometer) IEC 1027-l 991 Aural Acoustic Impedance/Admittance Type 3 Type 4 (Audiometer) IEC 601-l Medical Electrical Equipment General Requirements For Safety Designed to Meet International Standards Organization requirements fo Electro-...
  • Page 6 Pneumatic Svstem Pressure Range (corrected for altitude): + 200 to - 400 dapa (1 dapa = 1.02 mm water) Pressure sweeps to at least -100 dapa if tymps complete otherwise sweeps to -400 daPa Pressure Accuracv: +/- 15% or +/- 10 daPa whichever is greater. Rate of Sweep: 600 daPa/sec - for tymp slopes of <0.2 ml per 24 daPa 200 daPa/sec - for tymp slopes =,>...
  • Page 7 Stimulus Tone Transducer TvPe 4000 Frequency (HZ) 1000 2000 Contra (Insert Phone) (in HA-l Coupler) IPSI (in HA-l Coupler) Contra (Insert Phone) 11.5 15.0 (in IEC 711 Coupler) Rise/Fall Time: 5 to 10 msec Pressure: Automatically set to the pressure of peak compliance - 20 daPa. Reflex Determination: Minimum compliance change - 0.05 cm Approximately 2 -12 seconds, depending on number of test frequency...
  • Page 8 Output Hearing Level Control Calibrated in dB HL. Measured in increments of 5 dB Ranges: 125 Hz -10 to 50 dB B HL 500 to 6000 Hz -10 to 90 dB B HL 250 and 8000 Hz -10 to 70 dB B HL Additionally a "+1 0 dB"...
  • Page 9 Format Signal Continuous - Signal steady as long as present bar is depressed Pulsed Pulse rate: pulses/sec Duty Cycle: Rise/Fall Time: 20 - 50 msec On/Off Ration (between pulses): > 20 dB Frequency Modulation FM Rate: 5Hz FM deviation: +/- 5% Transducers Headset: TDH-39 Earphones with 60 ohm impedance...

  • Page 10: Front Panel Controls

    DESK-TOP FRONT PANEL CONTROLS AND BACK PANEL CONNECTORS FRONT PANEL CONTROLS AUDIOMETER TYMP & REFLEX CONTROLS Audiometer Mode Tymp Tymp & Reflex Program Stimulus Ipsi, Contra or lpsi & Pulse, Steady or FM Contra 500, 1K, 2K or 4KHz Frequency Up, Down Frequencies 250, 500,..or 8KHz Rotary Knob (numeric)
  • Page 11 Display The display consists of an LCD panel which will display alpha-numeric, icons and graphics (240 X 64 pixels). Items displayed are: Frequencies (alpha-numeric) and Intensity (alpha-numeric) in dBHL Tympanogram (graphics) Ear Canal Volume (alpha-numeric) Tymp Peak-Admittance (numeric) Gradient (alpha-numeric) Tymp Peak-Pressure (numeric) Left/Right Ear (symbol) Memory Ml to M8...
  • Page 12 Wallmount power supplies of various types with 5 pin DIN connections are available. Either three prong plugs (grounded) or two prong plugs (ungrounded) are provided depending upon the safety requirements of the country. The internal power supply, powered by AC line, 50 or 60 Hz via IEC 320 power inlet with fuse and on/off switch on the rear panel, is also available, for the countries where the wallmount power supplies are not available.

  • Page 13: Optional Accessories

    SUPPLIED ACCESSORIES CONT. VERSION 4 1738-0520 Wall Chart Rolled 1700-1030 Assembly Test Cavity (0.5, 2.0 & 5.0 cc) 1700-9622 Eartops Package (Screening) 1738-0100 Instruction Manual 1738-9600 Printer Paper (3 rolls supplied with new unit) 1738-9610 Kit, Grease, 0 Ring 8000-0175 Test Headset Ass’y (TDH-39) (1738-0404 Label Version 4 installed at factory)

  • Page 14: Functional Description

    FUNCTIONAL DESCRIPTION...

  • Page 15: Instrument Description

    INTRODUCTION INSTRUMENT DESCRIPTION The GSI 38 Auto Tymp is a versatile combination instrument which provides testing capability for tympanometry alone, tympanometry combined with screening acoustic reflex measurements, and screening audiometry. Four different versions are available to meet your individual testing needs.

  • Page 16: Front Panel Controls And Indicators

    FRONT PANEL CONTROLS AND INDICATORS Figure 2-2: Front Panel Power on indicator and label: indicator is illuminated when the GSI 38 is receiving power. Print Screen: pushbutton used to print the currently displayed page of memory. Print All Memory: used to print all pages of data from memory.
  • Page 17 F l l Selecting < causes the cursor to move the next lower frequency; < and > Hz: selecting > causes the cursor to move to the next higher frequency. Push downward to present test signal to appropriate earphone; Present Bar: release to turn test tone off.

  • Page 18: Printer And Display

    PRINTER AND DISPLAY The printer cover can be removed to reload paper. See Figure 2-3 for location of the printer and printer cover. Section 2-7 provides paper loading instructions. Figure 2-3: Printer and Display The display indicates test mode, parameters for test and test results. See Figure 2-3 for location of display.
  • Page 19 Figure 2-6: Display for TYMP/REFLEX Test (Reflex test results given in "dB HL”). Figure 2-7: Display Format TYMP/REFLEX Test (Reflex test results given in "dB HL" and also shown with a “tracing”) Figure 2-8: Display Format for AUDIOMETRY REAR AND BOTTOM PANEL LABELS/CONNECTORS are shown in Figure 2-9 and a description of The rear panel labels and connectors each one follows.
  • Page 20 Figure 2-9: Rear Panel Company name, address, model, serial number and country of origin. Symbol denotes a Type B, Class II Product per IEC 878 as referenced in IEC 601 Standard. Symbol denotes Attention, consult accompanying documents. Symbol indicates a service adjustment part that is intended for service personnel use only.
  • Page 21 Figure 2-11: Test Cavity PRETEST TYMP CHECKS For your convenience, a test cavity is provided with your GSI 38 Auto Tymp. This test cavity enables you to quickly verify, on a daily basis, the prober calibration of your unit. GSI strongly recommends that you make this quick check a part of your daily routine.

  • Page 22: Altitude Adjustment

    Also, since there is no compliance peak detected, it is not possible to calculate a gradient. Therefore, the GSI 38 displays the dashed lines when a gradient calculation isn’t possible. Using the same sequence, place the probe in the test cavity opening labelled 2.0 cm...
  • Page 23 6.500 - 10,000 2.5 +/- 0.1 The altitude calibration mode can only be entered when the GSI 38 is powered up from its “off’ state while the program mode pushbutton, PROG is depressed. Hold the PROG pushbutton for approximately five seconds.

  • Page 24: Program Mode

    To enter the program mode, select the PROGram pushbutton located on the front panel. The following screen appears the first time you enter the Program mode after you receive your GSI 38 from the factory. (in other words, there are the default settings used at the factory during production).
  • Page 25 NOTE had previous/y entered a custom header, position If you the square cursor next to the asterisk (*) in front of Pm Header custom and press M+ to cause the line cursor to appear the left-hand margin along the bottom of the display.

  • Page 26: Exit Program Mode

    NOTE This setting (PRINT-AUD) selects the format for the printout only. An audiogram always appears on the screen while in this mode. NORMAL BOX FORMAT It is possible to have the normal box, as described by ASHA, appear on the tympanogram screen and printout.

  • Page 27: Memory Erase

    Audiometric test results are stored in memory when the M+ pushbutton is pressed a total of eight memory locations are available with the GSI 38. Each test result is assigned a memory location number in order of sequence obtained starting with Ml and continuing up to M8.

  • Page 28: Printing Test Results

    PRINTING TEST RESULTS The printout will begin with a header if it is selected during the program mode (i.e., GSI 38 or a custom header designed by you). The next two lines contain space for entering the individuals name and the test date. This is followed by the test results in the order that they were obtained/selected.

  • Page 29: Circuit Theory

    CIRCUIT THEORY...
  • Page 30 The Microprocessors The GSI 38 operation is controlled by two MC68HC1 1 E 1 microcontrollers. The microcontrollers have an 8 bit CPU and additional built in peripheral devices. It was designed using HCMOS technology which combines smaller size and higher speeds with the lower power and high noise immunity of CMOS.
  • Page 31 Monitoring of the Switch Matrix Keys Continued: The present bar, subject response switch, frequency up/down key, paper advance key, and page key all function as press and hold controls where the corresponding function is active only as long as the control is pressed. Single action controls include the mode control keys (Prog, Aud, Tymp, Tymp/Reflex) tone type keys (FM, Steady, Pulsed), routing keys (L,R), memory control keys (Page, M-, M-), and the printer control keys (Print Screen, Print All, Paper Advance).
  • Page 32 Pure Tone Stimulus The Audio microprocessor controls the frequency generator for the associated Left Earphone, Right Earphone, Ipsilateral, or Contralateral outputs. The foundation of the pure tone stimulus generator is a Programmable Timer (U24). Output 0 (SQWIN) is a square wave with a 50/50 duty cycle equal to the selected front panel frequency. Out 1 (SCFCLK) is a square wave that is either fifty or one hundred times greater than the front panel frequency and is used to set the band pass of the switched capacitor filter.
  • Page 33 unction I Control The test results are printed using a thermal print head printer on paper that is 112mm wide. When the print function is selected the processor starts building a graphical bit mapped image of the printout in the Audio RAM (U32). The printout is formatted as specified by the selections made in the program mode and stored in EEPROM.
  • Page 34 The Tymp Microp rocessor controls the following functions: Communication to the Audio Microprocessor; Asynchronous communications data is transmitted and received using the processors built in serial communications interface. The interface is located within port D of the microprocessor. PDO is the Tymp receive data line (TRXD) and PD1 is the Tymp transmit data line (TTXD).
  • Page 35 is performed by the 226 Hz band pass filter (U65). The filtered RMS microphone signal is rectified to a dc level for input to the Microprocessor A/D convertor. This filtered signal is level adjusted (U59) by the Microprocessor to establish an optimum operating range for the system during the tymp sweep or reflex testing.
  • Page 36 CALIBRATION...

  • Page 37: Equipment Required For Calibration

    EQUIPMENT REQUIRED FOR CALIBRATION TYPE 1 SOUND LEVEL METER ARTIFICIAL EAR 2 cc COUPLER (GSI #1700-2005 OR B&K #DB0138) 9A (6 cc) COUPLER OR B&K ARTIFICIAL EAR (B&K #4153) MANOMETER VOLTMETER (RMS) FREQUENCY COUNTER 1700-l 030 TEST CAVITY SMALL STANDARD (SLOTTED) SCREWDRIVER SMALL PHILLIPS (CROSS) SCREWDRIVER...

  • Page 38: Calibration Procedure

    6, 7, and 8 to the “ON” position. Set the Cal/Norm Switch to the Cal Mode, then power up the unit. At power-up the display should indicate the unit model and version number (GSI 38 Version X), the Tymp/Reflex Software Revision Number (Tymp/Reflex Rev XXX), the Audiometer Software Revision Number (Audiometer Rev...
  • Page 39 (ROUTINE CALIBRATION) Verify that Dip Switches 6, 7, and 8 are in the OFF position. Power up the unit. Slide the Cal/Normal Switch to the Cal Mode position. The display should appear as follows: CALIBRATION MODES PRINT HEAD CAL ATTEN MAX CAL XDUCER STIM CAL CUSTOM RTL CAL PROBE TONE/MIC CAL...

  • Page 40: Audiometer Calibration

    AUDIOMETER CALIBRATION ATTENUATOR MAXIMUM OUTPUT CALIBRATION: During routine calibration it should not be necessary to calibrate the Attenuator Maximum Output. However, if the Audiometer Default Data has been loaded then the Attenuator Maximum Output must be calibrated. Connect the right phone output unloaded to an RMS Meter. Use the !=I Hz [c] Keys to position the cursor on the 38 display at the ATTEN MAX CAL position.

  • Page 41: Cal Mode

    AUDIOMETER SPL OUTPUT LEVEL CALIBRATION Use the a IHz[m IKeys to position the cursor on the 38 display at XDUCER STIM CAL. Press the I=] Key to enter the XDUCER STIM MODE. The display should now indicate: XDUCER STIM CAL 40.0 dB NOTE: Tone Bar is OFF 1 2 5 Hz...
  • Page 42 For 8 KHz ANSI Standard RTL for 0. dB HL = 13.0 dB SPL (+)60 dB HL = (+) 60.0 dB SPL 60. dB HL = 73.0 dB SPL When calibrating using a Sound Level Meter (SLM) it is important to add or subtract the appropriate microphone correction.
  • Page 43 4 KHz ANSI Standard RTL for 0. dB HL = 9.5 dB SPL Reference HL for Calibration (+)80. dB HL = (+)80.0 dB SPL (+) or (-) Microphone Correction (+) 1.0 dB SPL 80. dB HL = 90.5 dB SPL The following table contains the ANSI Standard Reference Threshold Levels RTL's at 0 HL for each frequency when using TDH-39P earphones.
  • Page 44 CUSTOM RTL CAL This mode is used primarily if a customer wants to calibrate using transducers other than TDH-39P earphones. This mode allows the technician to program different RTL values to be displayed when calibrating using the XDUCER STIM CAL MODE. Once programmed, the Custom RTL values will be displayed each time the XDUCER STIM CAL MODE is entered.
  • Page 45 Press the m Key and the display will stop flashing. Use the dB HL dial to adjust the Probe Tone Level to 85.5 dB SPL (+/- 0.9 dB). At this point the Probe Tone Frequency may be verified. It should equal 226 Hz (+/- 6 Hz).
  • Page 46 COMPLIANCE CAL 2.1 ECV 0.5 Place the probe into the 0.5 cc calibration cavity then press the [M+I Key to start the 0.5 cc calibration. The display will stop flashing and remain in steady state to indicate that calibration is in progress. NOTE: If the wrong cavity size is used the display will indicate E74 in the lower right hand corner.
  • Page 47 Therefore, as you go up in altitude, barometric pressure decreases making the hardwall cavity appear larger than it is. The GSI 38 allows the flexibility to display the real altitude effect or to correct the ear canal measurements relative to sea level.
  • Page 48 PRESSURE CAL Use the [~~Hz~~~ Keys to position the cursor r at the Pressure Cal position. Press the I-1 Key to enter the Pressure Cal Mode. The display will update to the following “flashing” display. ‘PRESSURE CAL ECV OPEN daPa At this point make sure that the probe tip is in open air.
  • Page 49 PRINT HEAD CAL Use the 1x1 HzLG] Keys to move the cursor at the Print Head Cal position. Press the -1 Key to enter the Print Head Cal Mode. Press the [=I Hz to lighten the printout and the [=I Hz Key to darken the printout.
  • Page 50 S4 DIP SWITCHES. Unused Unused Norma! Cal Mode Operation Factory Auto Normal Cal Mode Operation To Be Defined Normal Cal Mode Operation S4 _ To Be Defined Normal Cal Mode Operation To Be Defined Normal Cal Mode Operation Tymp/Reflex Default Data Normal Cal Mode Operation Audiometer Default Data Normal Cal Mode Operation on...

  • Page 51: Troubleshooting

    TROUBLE SHOOTING...
  • Page 52 ERROR MESSAGES (EXX) NOTE: If an Error Message is observed the associated code number should be recorded for future reference. The Error Code Number is designed to point to a specific block of circuitry which will enable the technician to repair the problem in a fast, efficient manner.
  • Page 53 Code Number Description/Probable Cause Conf. Register Error / if non-recoverable re-calibrate Config, Register then replace Microprocessor U34. Halt in Response to Remote Command / if non-recoverable possible defective Audio/Tymp Communications Chip U36 or Microprocessor U34. Invalid Keycode detected in CMDTSK / if non-recoverable possible defective Switch Panel, Switch Buffer U26, U27, or U28, or Microprocessor U34.
  • Page 54 Code Number Description/Probable Cause Remote Record received with a Bad Record Format, invalid Key Code, or Invalid Record Type / EEPROM Checksum Error / EPROM TO EEPROM Data Load Error / Remote Command received from an external remote device (factory auto cal) which is invalid due to mode or is an unsupported record type / Remote command received from an external remote device (factory auto cal) which is ignored due to mode /...
  • Page 55 TYMP PROCESSOR RELATED MESSAGES Description/Probable Cause Code Number EPROM Checksum Error on power up / Internal RAM Error on power up / Watch Dog Timer Time Out / CPU Clock Failure / Undefined Interrupt Error / Opcode Trap Interrupt Error / External RAM Error / Stack Overflow Error Config.
  • Page 56 Description/Probable Cause Code Number Value out of range of Pressure Transducer Pressure Gain Error / Remote Record Error / Non-Fatal Cal Data Read/Write Error / Reflex Test not received for the Audio within the allotted info time / Remote Command invalid for the mode / Leak or Occlusion Error / Pump end of stroke / Undefined Error Number Reported /...
  • Page 57 DISASSEMBLY...
  • Page 58 CAUTION STATIC SENSITIVE DEVICES/USE STATIC PROTECTION DISASSEMBLY OPENING CASE TO GAIN ACCESS TO INTERNAL COMPONENTS. REMOVE 2 SCREWS MARKED “A” LOCATED UNDER FRONT EDGE OF UNIT AS SHOWN IN DRAWING 1. NOTE: IT MAY BE EASIER TO STABILIZE UNIT AND LOCATE COMPONENTS IF UNIT IS PLACED ON LER SIDE PRIOR TO REMOVING SCREWS AND OPENING CASE.
  • Page 61 SWITCH PANEL REMOVAL DISCONNECT REAR PANEL POWER CONNECTOR. REMOVE HL KNOB. OPEN CASE. DISCONNECT AUDIO/TYMP BOARD CONNECTOR J4. REMOVE THE ADHESIVE CABLE CLAMP WHICH SECURES THE SWITCH PANEL CABLE BY GRASPING FIRMLY AND GENTLY PULLING AWAY FROM THE TOP COVER. THE SWITCH PANEL IS SECURED TO THE TOP COVER BY ADHESIVE BACKING.
  • Page 62 INSTRUMENT ASSEMBLY PARTS LIST PART NUMBER DESCRIPTION INSTRUMENT ASSEMBLY, GSI 38 CONSISTING OF: 1738-3100 LABEL SET, GSI 38 1738-0480 CASE, BOTTOM 1717-7001 KNOB, CONTROL 1717-7006 GOUND PLANE, ESD PROTECT 1738-042 1 PRINTER, 112mm, HIGH SPEED 1738-0430 SWITCH PANEL, GSI 38...
  • Page 63 AUDIO/TYMP BOARD ASSEMBLY DRAWINGS/SCHEMATICS...

  • Page 73: Integrated Circuits

    AUDIO/TYMP BOARD PARTS LIST DESIGNATION DESCRIPTION PART NUMBER INTEGRATED CIRCUITS IC, SMT, 74 HC 4075, 3 INPUT OR 5905-4075 IC, SMT, 74 HCOO, QUAD 2 INPUT NAND 5905-0000 IC, SMT, 74 HC02, QUAD 2 INPUT NOR 5905-0002 59334064 IC, SMT, MC 34064, UNDER VOLTAGE SENSOR IC, SMT, MC 14053, TR1-2 CH MUX/DEMUX 5904-4053 IC, SMT, 74HCC138, 1 OF 8 DECODE/DEMUX...
  • Page 74 DESIGNATION DESCRIPTION PART NUMBER INTEGRATED CIRCUITS CONTINUED... SEE U38 5908-7905 IC, SMT, MC 79L05, -5V REG 5909-0072 IC, SMT, TL072, JFET OP AMP 5909-1013 IC, SMT, LT1013, DUAL OP AMP IC, SMT, 140518, ANALOG MULTI PLXR SEE U45 SEE U5 5904-4 119 IC, SMT, MC 34119, LOW POWER AUD.
  • Page 75 DESIGNATION DESCRIPTION PART NUMBER RESISTORS 8 POTENTIOMETERS THERMISTOR, 10K, 10%, 4.41%/C 6740-l 302 SEE R1 SEE Rll - R13 SEE Rl SEE R 1 1 - R13 R21 - R22 SEE R1 SEE R22 SEE R1 RES, SMT, 24.9K, 1%, .12W 6650-2249 SEE R1 RES, SMT, 64.9K, 1%, .12W...
  • Page 76 DESIGNATION DESCRIPTION PART NUMBER RESISTORS 8 POTENTIOMETERS SEE R14 POT, CER MET, 1K OHM, +/- 10% 6049-0500 POT, CER MET, 50 K, +/- 10% 6049-0350 RES, SMT, 40.2K, 1%, .12W 6650-2402 R75 - R76 SEE R14 SEE R43 SEE Rll - R13 R79 - R81 SEE R6 SEE R39...
  • Page 77 DESIGNATION DESCRIPTION PART NUMBER CAPACITORS CAP, ELECT, 4700uF, 20%, 16V 4450-6311 CAP, SMT, CER, 01uF, 10%, 50V 4500-l 041 SEE C2 CAP, SMT, CER, .47uF, 20%, 50V 4500-4742 C7 - C8 SEE C2 CAP, SMT, TANT, 1.0uF, 20%, 35V 4550-l 052 SEE C2 SEE C5 SEE C2...
  • Page 78 DESIGNATION DESCRIPTION PART NUMBER CAPACITORS CAP, SMT, CER, .047uF, 10%, 50V 4500-4731 CAP, SMT, TANT, 2.2uF, 10%, 20V 4550-2251 C82 - C84 SEE C2 SEE C25 C86 - c95 SEE C2 SEE C25 SEE C5 SEE C50 C99 - C100 SEE C2 C101 SEE C50...
  • Page 79 DESIGNATION DESCRIPTION PART NUMBER RESISTOR NETWORK RP10 SEE RP1 RP12 RES, NETWORK, SMT, CUSTOM X 15 6740-20 13 RP13 RES, NETWORK, SMT, CUSTOM X 8 6740-2016 RP14 6740-2015 RES, NETWORK, SMT, CUSTOM X 8 RP15 RES, NETWORK, SMT, CUSTOM X 8 6740-2014 RP17 SEE RP1...
  • Page 80 PROBE...
  • Page 84 PROBE ASSEMBLY PARTS LIST PART NUMBER DESIGNATION DESCRIPTION 1738-3200 ASSEMBLY, PROBE CONSISTING OF: WIRE, CLEANING 1737-0430 ASSEMBLY, NOSECONE 1737-201 0 NOSECONE, THREADED 1737-6004 ASSEMBLY, PROBE CABLE 1738-1000 1738-4700 ASSEMBLY, PROBE BOARD 1738-7025 CASE, PROBE, LEFT 1738-7030 CASE, PROBE, RIGHT TUBING, TYGON, .062 ID x .5 LG 0028-7576 J TUBING, TYGON, .125 ID x .5 LG.
  • Page 85 DESIGNATION DESCRIPTION PART NUMBER RESISTORS CONTINUED SEE R1 SEE R3 R 1 1 RES, SMT, 243K OHM, 1%, .12W 6650-3242 SEE R6 RES, SMT, 2 M OHM, 1%, .12W 6650-4200 CAPACITORS CAP, SMT, CER, .01uF, 10% 50V 4500-l 031 CAP, SMT, TANT 47 uF, 20%, 10V 4550-4762 CAP, SMT, CER, 1uF, 10%, 35V 4550-l 041...
  • Page 86 NOSECONE “0’‘-RING PARTS LIST DESIGNATION DESCRIPTION PART NUMBER KIT, NOSECONE, W-RING, GREASE CONSISTING OF: 1738-9605 KIT, GREASE, "O"-RING G 1738-9610 NOSECONE, THREADED 1737-6004 W-RING 5855-0010...
  • Page 87 PUMP...
  • Page 89 PRINTER...
  • Page 91 PRINTER CONNECTION BOARD PARTS LIST DESIGNATION DESCRIPTION PART NUMBER ASSEMBLY, PRINTER CONNTECTOR BD. CONSISTING OF: 1738-4710 ASSEMBLY, CABLE, PRINTER-CONN. BD. 1738-0205 PRINTER CONNECTOR BOARD 1738-0710 CONN, FIAT CABLE, 20 CONTACT 4230-1620 CONN., FIAT CABLE, 4 CONTACT 4230-1604...
  • Page 92 DISPLAY...
  • Page 94 LIQUID CRYSTAL DISPLAY PARTS LIST DESIGNATION DESCRIPTION PART NUMBER ASSEMBLY, LIQUID CRYSTAL DISPLAY CONSISTING OF: 1738-1010 ASSEMBLY, CABLE, LCD 1738-0200 DISPLAY, LIQUID CRYSTAL, 240 X 64 5437-1238...
  • Page 95 ASSEMBLY...
  • Page 96 ASSEMBLY CONTRA PHONE PARTS LIST QUANTITY D E S C R I P T I O N PART NUMBER INSERT PHONE ASSEMBLY 8000-0079 CONSISTING OF: CABLE, COAXIAL, 6’ 4204-0209 EARPHONE (AUDIOVOX) 470 ohm 8000-0037 EARTIP, MODIFIED 8000-0255 ASSEMBLY TDH-39 TEST HEAD SET PARTS LIST QUANTITY DESCRIPTION...

Table of Contents