Welch Allyn Atlas Service Manual
  1. Manuals
  2. Brands
  3. Welch Allyn Manuals
  4. Monitor
  5. Atlas
  6. Service manual

Welch Allyn Atlas Service Manual

Hide thumbs Also See for Atlas:
Table of Contents

Advertisement

Quick Links

Patient Monitor
Operator Manual
Welch Allyn Medical Division

Advertisement

Table of Contents
loading

Related Manuals for Welch Allyn Atlas

Summary of Contents for Welch Allyn Atlas

  • Page 1 Patient Monitor Operator Manual Welch Allyn Medical Division...
  • Page 2 Drawings and/or illustrations and/or part numbers contained in this document are for reference purposes only. For current revisions call the Welch Allyn Customer Service phone number listed in Section 1 page 2. SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS PATIENT MONITOR i...

  • Page 3: Table Of Contents

    1.4 Main Menu Architecture ....................6 1.5 Atlas System Block Diagram ..................7 Section 2: Service (See User Manual 6200-42E for Atlas Specifications) 2.1 Incoming Inspection,Checklist ..................1 Repair Tests ......................2-4 Table 2-1 :Tools Required for Service, Calibration and Software Loading ....5 Table 2-2:Software/Firmware Revision Levels ............
  • Page 4 B ........................repair parts list C ..................interconnect diagram 620396 Rev A D ..............electrical schematics and circuit board layouts E ......Safety Tests: Required Equipment and Procedures and Test Results Form SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS PATIENT MONITOR iii...

  • Page 5: General Information

    IMPORTANT: for a complete description on the func- tion and use of the Atlas, as well as user safety warn- ings, cautions, and warranty information, read and understand the Atlas Operator’s Manual part number 6200-42E (English).
  • Page 6 Skaneatles Falls, NY 13153-0220 U.S.A Telephone 1-800-535-6663 When calling, refer to the model number on the bottom of the Atlas. The Model Number is the first three digits of the Serial number number found on the bottom of the Atlas.

  • Page 7: Product Model Number Structure

    J= Japanese Use number designation for line cord localization as follows: 1 = US, Canada, Japan Version 2 = European Version 4 = United Kingdom Version 6 = Australian Version SERVICE MANUAL 6200-43E REV A WELCH ALLYN ATLAS PATIENT MONITOR 3...

  • Page 8: Main Menu Architecture

    The Display A/D Channels also lets you press <SET> up and down to display additional sets of information, but does not change the menu page that you are on, just writes different information on the right side of the screen. 4 WELCH ALLYN ATLAS PATIENT MONITOR SERVICE MANUAL 6200-43E REV A...
  • Page 9 Section 1 - General Information SERVICE MANUAL 6200-43E REV A WELCH ALLYN ATLAS PATIENT MONITOR 5...

  • Page 10: Incoming Inspection,Checklist

    2.1.3 Clean and disinfect by following the instructions printed in the Operator Manual. 2.1.4 Operate the Atlas to verify the customer complaint before making any changes to the unit. Call the customer if the complaint is unclear.

  • Page 11: Repair Tests

    250mmHg. Need: 100cc (+10/-0cc) test cavity stopwatch squeeze bulb 2.2.1.1 Connect Atlas to test 100cc volume and Setra Gage as shown in Figure 2.3.1.1 2.2.1.2 Turn Atlas ON 2.2.1.3 Press Time and Date button to access Options Menu. 2.2.1.4 Press Lead Select button to select Service Mode.
  • Page 12 296.0 mmHg and 329.0 mmHg. 2.2.6.2 Over 15 mmHg Test: Atlas hardware must detect if the pneumatic system has been pressurized greater than 15 mmHg for more than 155 seconds but less than 180 seconds.
  • Page 13 2.2.11.1Fill container wtih approximately 96 degree F water 2.2.11.2Attach temperature probe neaqr the sensing part of the thermometer and insert into the warm water. 2.2.11.3Accuracy must be within +/- 0.2 degrees F. WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A...
  • Page 15 Table 2-2:Software/Firmware revision levels c l l / 8 / / 8 / / 8 / / 8 / / 8 / / 8 / / 8 / / 8 / 6 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A...

  • Page 16: Etco

    Caution: Improper use, stor- 2.3.1.1 Connect: manometer, bulb, and 500cc vessel age, handling of compressed to BP port with “T” connectors, Atlas to PC gas vessels can cause injury with serial cable. or death! Follow gas manu- 2.3.1.2 Turn AtlasON and start HyperTerminal on PC.
  • Page 17 Continue button and NasalCO2 Sample lines actually sampling. as bio hazard material! After one minute, press the Continue button to let the Atlas start sampling CO 2.3.2.13 Press <BP Start/Cancel> Message: “CO calibration successful” or “CO calibration failed” will appear on the CRT display.
  • Page 18 2.3.3.8 Detach the Scrubber from the watertrap and reattach the tubing. 2.3.3.9 Replace the watertrap in the watertrap socket. 2.3.3.10 Press Trend to return to the waveform screen. SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 9...

  • Page 19: Printer Calibration - Section 2.3.4

    There should be access for voltmeter probes at the Atlas end of the cable when it is installed DMM / DVM with 10mV resolution on a 10V scale PC with HyperTerminal Serial cable and connector 2.3.5.1.
  • Page 20 = ZZZZ mV true = 5590 mV OK (where ZZZZ is the raw uncalibrated reading that the instrument made.) 2.3.5.13 Finish by typing: (this will re-boot ATLAS) Pangea> hw reset<ENTER> 2.3.5.14 Turn Atlas OFF and remove the power supply.
  • Page 21 Solder the resistor across RCA plug terminals. 2.3.6.2 Plug the resistor assembly into the Atlas Temperature jack. 2.3.6.3 Connect the Atlas to the PC serial port. 2.3.6.4 Turn the Atlas ON. NOTE: Temperature display will show a valid temperature. 2.3.6.5 Start HyperTerminal on the PC.
  • Page 22 (-) when viewed looking into the battery compartment. 2.3.7.3 Adjust potentiometer R338 to obtain 6.85VDC. (It is located at the right of the battery jack. Turn it counterclockwise to increase the charging voltage. SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 13...
  • Page 23 i t i i l i t " " e " " e t x t t l u , r i z i l l l i l l i...

  • Page 24: Downloading Operating System 2.4

    2.4 Downloading Operating System 2.4 Downloading Operat- When required: to load latest revision software* ing System on a fully functioning Atlas or to reload software (when upgrading software or after replacing the MCU board. The replacing CPU board) atlas_dl.exe program loads the following files: atlas.out.gz...

  • Page 25: Downloading Software And Nvram Text Files

    (hardware reset restarts Atlas and saves the new settings) 2.5.6 Verify the serial number correct 2.5.7 Recalibrate Atlas unit. After calibration is complete. 2.5.8 Check alarm settings and User selected advanced Configurations 2.6 Downloading Software & NVRAM Text files Downloading Soft- 2.6.1 Use atlas_dl.exe as in step 2.4.
  • Page 26 4 = United Kingdom Version 6 = Australian Version Specifications: See Operator Manual Specifications for all of the above listed models of Atlas including performance, accuracy, range, size, weight, power, environmental, are documented in an appendix to the User Manual.
  • Page 27 Section 3 - Troubleshooting 3.1 Functional Test and Initial Diagnostic 1. Review customer complaint and determine if it is safe to plug in and turn on Atlas 2. Plug in Atlas, no sensors attached. Note: “Idle” screen is normal 3. Check for AC~ LED lit.
  • Page 28 – in Operator manual. If not matching, indicates memory problems. Changing only the language should not change any of the other factory default settings. 45. Press <DATE/TIME><LEAD SELECT> SERVICE MANUAL 6200-43E REV. A 2 WELCH ALLYN ATLAS MONITOR...
  • Page 29 66. Set the simulator for a normal reading (140/80, 100BPM, NSR). 67. Press <BP START/CANCEL> 67.1. System should start pump, display manom- eter value in SYSTOLIC LED; this value should track and be very close to pressure SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 3...
  • Page 30 80. 20 seconds after 1 stops flashing, BP measurement starts. 81. BP reading as above. 81.1. If BP does not start: Replace main board 81.2. If BP measurement incorrect recalibrate SERVICE MANUAL 6200-43E REV. A 4 WELCH ALLYN ATLAS MONITOR...
  • Page 31 85. Press <BP START/CANCEL> and note the time (to the second). 86. The BP should abort with an alarm after no longer than one minute. 87. Cycle power on Atlas, connect a 5 lead cable set to the Note: Simulator must sup- simulator. port impedance respirator.
  • Page 32 121.1. Hear pump motor start. 121.2. See solid line waveform on lower trace. 121.3. See dashes in Respiration Rate. 121.4. See dashes in mmHg (or % or kPa, as configured). SERVICE MANUAL 6200-43E REV. A 6 WELCH ALLYN ATLAS MONITOR...
  • Page 33 Replace the battery if performance falls below specification NOTE: Configuration settings for printing are different for text pages (Advanced Configuration and Trend displays) PRINTER and for waveforms. 133. Connect ECG simulator to generate a sample waveform. SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 7...
  • Page 34 145. Pulse tone should be silent even though heart rate is shown. 146. Press SpO volume button “+” 8 times. Should get audible and then louder. 147. Disconnect ECG cable SERVICE MANUAL 6200-43E REV. A 8 WELCH ALLYN ATLAS MONITOR...
  • Page 35 Press <SpO ALARMS OFF> button again 169. Should hear Technical alarm sound, see error mes- sage, LED unlit in <SPO ALARMS Off> button. 170. Turn system off and back on. SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 9...
  • Page 36 Wait for battery to run down. With fully charged battery, after no less than 50 minutes, should hear single tone, get message that system will shut down in 10 minutes. SERVICE MANUAL 6200-43E REV. A 10 WELCH ALLYN ATLAS MONITOR...
  • Page 37 BP measurements) and error message that system shutdown is imminent. SELF DIAGNOSTIC All the possible error messages are documented in an appendix to the Operator’s Manual. ERROR MESSAGES SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 11...
  • Page 38 Paper inserted backwards Printer 1 Feeding but not printing Wrong kind of paper Failed printer CRT 1 CRT is blank CRT cables Reinstall software Failed CRT Failed Deflection board Failed Main Board 12 WELCH ALLYN ATLAS MONITOR Service Manual 6200-43E Rev. A...
  • Page 39 Possible patient physiology problem Impedance Respiration Possible patient physiology problem ECG 1 IR waveform not displayed (dashes) Poor signal LA/RA placement Use modified electrode placement on chest walls WELCH ALLYN ATLAS MONITOR 13 Service Manual 6200-43E Rev. A...
  • Page 40 Expect infinity. Force an alarm state and Intermittent signal Cable Cable connection expect 0 Ohms. Brief signals Battery tone errors Connect AC Battery warnings will signal Nurse Call for only a second , every minute or two WELCH ALLYN ATLAS MONITOR Service Manual 6200-43E Rev. A...

  • Page 41: Top Level Troubleshooting Index

    Install printer paper if printer is fitted TROUBLESHOOTING INDEX Review customer complaint and determine if it is safe to plug in and turn on Atlas If not safe to power up: smoke/flames/smell reported? Goto Power 1 Check power available light...
  • Page 42 Check Alarms/Sounds Goto Sound 1 Check BP Goto BP 1 Check ECG Goto ECG 1 Check SPO2 Goto SPO2 1 Check Temp Goto Temp 1 Check CO2 Goto CO2 1 SERVICE MANUAL 6200-43E REV. A 16 WELCH ALLYN ATLAS MONITOR...
  • Page 43 If passed, goto SPO2 1 No lights in TEMP (622xx and 623xx) If any are lit, goto Bad Boot 1 No lights in ALARMS OFF buttons If any are lit, goto Bad Boot 1 SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 17...
  • Page 44 Write down all settings for resetting to customer preference later Press <PRINT> if printer fitted If printer problems, goto Printer 1 Press <TREND> to return to idle screen SERVICE MANUAL 6200-43E REV. A 18 WELCH ALLYN ATLAS MONITOR...
  • Page 45 If no display at all on CRT: Check connections: CRT to Yoke cable CRT to Anode cable CRT to Deflection board Deflection board to Main board cable Replace CRT Replace Deflection board Replace Main board SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 19...
  • Page 46 If multiple or all buttons do not report their names: Check Display board to main board cable Replace Display board Re-install software Replace CPU board Replace Main board SERVICE MANUAL 6200-43E REV. A 20 WELCH ALLYN ATLAS MONITOR...
  • Page 47 If alignment errors: Adjust printer mechanism If feeding problems: Adjust printer mechanism, replace feed roller If missing sections/rows of printout: Replace Printer Hardware If darkness not consistent across page: Replace Printer Hardware SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 21...
  • Page 48 If alignment errors: Adjust printer mechanism If feeding problems: Adjust printer mechanism, replace feed roller If incorrect printout, missing elements, missing grid, Printer Settings 1 Connect serial cable between Atlas and PC Start HyperTerminal on PC At Pangea> prompt, type: Pangea> nvram get printer_strobe_width_normal<ENTER>...
  • Page 49 Section 3 - Troubleshooting 3.4 Diagnostic Tests Connect serial cable between Atlas and PC Start HyperTerminal on PC Printer Settings 2 At Pangea> prompt, type: Pangea> nvram get printer_strobe_width_text<ENTER> Write down this value If problem is that TEXT printout is too light, increase this number.
  • Page 50 Power-on beep Turn off system, and turn on. Should hear loud Power-on beep. If beep not heard: Continue with this test. If no other sounds are heard, Replace Speaker Hardware. SERVICE MANUAL 6200-43E REV. A 24 WELCH ALLYN ATLAS MONITOR...
  • Page 51 Press <HR ALARMS OFF> button again. Should hear Technical alarm sound, see error message, LED unlit in <HR ALARMS Off> button. If alarm not heard: If error message not displayed SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 25...
  • Page 52 Atlas. Should hear technical alarm, see error message. If alarm not heard: If message not shown: Press <SPO ALARMS Off> button. Should stop Technical alarm sound, and erase error mes- SERVICE MANUAL 6200-43E REV. A 26 WELCH ALLYN ATLAS MONITOR...
  • Page 53 /RESP ALARMS OFF> button again. Should hear Technical alarm sound, see error message, LED unlit in <CO /RESP ALARMS Off> button. Turn system off and back on to clear state. <BP ALARMS Off> button SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 27...
  • Page 54 Five minutes after first message, should start hearing tone every minute, and get message that 5 minutes remain until shutdown. If alarm tone not heard at one minute intervals: If message not shown: SERVICE MANUAL 6200-43E REV. A 28 WELCH ALLYN ATLAS MONITOR...
  • Page 55 Press <BP START/CANCEL> System should start pump, display manometer value in SYSTOLIC LED; this value should track and be very close to pressure displayed by manometer in BP simulator (if fitted). SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 29...
  • Page 56 If pressure does not drop below 10mmHg immedi- ately: Replace Main Board hardware, BP Valve Press <AUTO> and X lights up (not flashing) Disconnect the tubing from the BP port on the Atlas. Press <BP START/CANCEL> and note the time (to the second)
  • Page 57 Section 3 - Troubleshooting Connect a 5 lead cable set to the simulator and to Atlas. 3.4 Diagnostic Tests Configure the simulator for NSR 100BPM and Impedance ECG 1 Respiration, Plug the cable into Atlas. Press <DATE/TIME> <TREND> Get Advanced Configuration menu.
  • Page 58 If alarm not heard: goto Sound 1 If error not seen: Reconnect SpO cuff to simulator Technical alarm stops Error message erased Unplug SpO cable from Atlas Technical alarm sounds See error “SpO cable missing” SERVICE MANUAL 6200-43E REV. A 32 WELCH ALLYN ATLAS MONITOR...
  • Page 59 Perform CO2 calibration If CO calibration did not solve problem, replace CO board Remove watertrap from Atlas Turn system off and back on to clear state. Press <DATE/TIME><TREND> SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 33...
  • Page 60 If problem remains: Replace CPU board Models 622xx and 623xx: If fan does not start when power turned on: Fan 1 Check Fan to Main board cable Replace Fan Replace Main board SERVICE MANUAL 6200-43E REV. A 34 WELCH ALLYN ATLAS MONITOR...

  • Page 61: Disassembly And Repair

    Section 4 - Disassembly and Repair, Domestic This section is a guide for disassembly and reassembly About Section 4 of the Atlas Monitor. Always refer to current revision schematics, diagrams and final safety test procedures before attempting to service this device.

  • Page 62: Model 200 Dissassembly

    Unplug Monitor from Model 200 Mains before disassem- bly! EXERCISE EXTREME CAUTION WHEN SERVICING THE ATLAS MONITOR! THE CRT ASSEMBLY AND CRT DE- FLECTION BOARD OPERATE ON APPROXIMATELY 8,000 VOLTS. : Circuit boards are sensitive to static electricity. Use wrist strap, ESD mats and ESD storage bags.
  • Page 63 4.1.6 Unplug Display Board Cable from jack J8 of the Main PCB. Note: Make sure this end of the cable is installed in J8 during reassembly so that cable folds will be correct. WELCH ALLYN ATLAS MONITOR 3 SERVICE MANUAL 6200-43E REV. A...
  • Page 64 Section 4 - Disassembly and Repair, Domestic 4.1.7 Remove E-Pac from over the CRT. 4.1.8 Unplug CPU/PCB from Main PCB PCA connector J4. 4.1.9 Unplug CRT socket board. Do not bend pins. 4 WELCH ALLYN ATLASMONITOR SERVICE MANUAL 6200-43E REV. A...
  • Page 65 4.1.10 Protect CRT pins with cap T-XXXXX 4.1.11 Unplug Yoke cables from connector J2 of CRT Deflection Board. 4.1.12 Unplug CRT Deflection Board from Main PCB with connector tool T-16654 Do not bend pins. WELCH ALLYN ATLAS MONITOR 5 SERVICE MANUAL 6200-43E REV. A...
  • Page 66 Section 4 - Disassembly and Repair, Domestic 4.1.13 Unplug 4 connectors from side of Main PCB. 4.1.14 Remove Power Supply assembly. 4.1.15 Remove alarm speaker. 6 WELCH ALLYN ATLASMONITOR SERVICE MANUAL 6200-43E REV. A...
  • Page 67 Section 4 - Disassembly and Repair, Domestic 4.1.16 Remove Main PCB from E-Pac and disconnect tubing and connectors. 4.1.17 Disconnect SpO board and remove it from E-Pac. 4.1.18 Remove main E-Pac section. WELCH ALLYN ATLAS MONITOR 7 SERVICE MANUAL 6200-43E REV. A...
  • Page 68 Section 4 - Disassembly and Repair, Domestic 4.1.19 Disconnect tubing from fitting. 4.1.20 Remove SpO connector from front panel. 4.1.21Remove CRT ground wire. Do not remove screw and washer. 8 WELCH ALLYN ATLASMONITOR SERVICE MANUAL 6200-43E REV. A...
  • Page 69 Section 4 - Disassembly and Repair, Domestic 4.1.22 Remove opposite CRT mounting screw and remove CRT. 4.1.23 Remove Keypad circuit board. 4.1.24 Remove Display PCB. WELCH ALLYN ATLAS MONITOR 9 SERVICE MANUAL 6200-43E REV. A...
  • Page 70 Section 4 - Disassembly and Repair, Domestic 4.1.25 Remove soft keys from Bezel. 4.1.26 Unscrew Alarm Silence Button holding screw to remove Silence button. 4.1.27 Remove printer by depressing tab. 10 WELCH ALLYN ATLASMONITOR SERVICE MANUAL 6200-43E REV. A...
  • Page 71 For reassembly, place connector on motor so orange wire is near mounting screw. 4.1.30 To remove printhead, disconnect cable from printer PCB. Lift spring and remove printhead from printer frame. WELCH ALLYN ATLAS MONITOR 11 SERVICE MANUAL 6200-43E REV. A...
  • Page 72 Use small screwdriver to pry connector apart. 4.1.33 For reassembly of printhead, use long nose pliers to attach cable to eliminate stress on flex circuit of printhead. 12 WELCH ALLYN ATLASMONITOR SERVICE MANUAL 6200-43E REV. A...

  • Page 73: Model 200 Re-Assembly

    Reassemble in reverse order of 4.2.1 disassembly with special attention to paths for cables and tubing. Two types of screws are used. Dis- play PCB is fastened with self tap. WELCH ALLYN ATLAS MONITOR 13 SERVICE MANUAL 6200-43E REV. A...
  • Page 74 4.2.2 Detail of Pump/Valve/CheckValve subassembly for reassembly. 4.2.3 Printer chassis rests on lip at back of case. 4.2.4 The IEC connector must be centered in the hole before 4 screws can be installed. 14 WELCH ALLYN ATLASMONITOR SERVICE MANUAL 6200-43E REV. A...
  • Page 75 4.2.5 Plug MCU/PCB in like this. Other models dissassembly/ reassembly. Due to the similarities between the ATLAS models, only key points are shown. Refer to the latest revision interconnect drawing, schematics, and layouts when servicing this product. WELCH ALLYN ATLAS MONITOR 15...
  • Page 76 Appendix A 10/14/99 Theory of Operation – Model 622/623 1 DC/DC Power Supply 1.1 Overview: 1.2 On/Off Circuits 1.2.1 Backup Regulator and Micro-Controller 1.2.2 18V boost converter and FET ON/OFF switch 1.3 +12V Boost Converter 1.4 Battery Charger: 1.5 Linear Regulators – 5VDC and 3.3VDC 1.5.1 5V regulator 1.5.2 3.3V Regulator 2 Patient Isolated Circuits...
  • Page 77 Appendix A 10/14/99 6 Recorder Electronics 6.1 Overview: 6.2 Power Supply – 24 Switcher 6.3 Motor Driver: 6.4 Temperature Amplifier:...
  • Page 78 DC/DC Power Supply 1.1 Overview: Atlas Model 622 and 623 can be powered either from AC or battery. A 50W, medical grade, offline switcher provides 12VDC from a universal AC input (85VAC to 264VAC – 50/60Hz). The battery is a rechargeable 6-Volt, 6.5 Amp-Hour, Sealed Lead Acid Battery, and will provide about 1.5 hours on a fully...
  • Page 79 Appendix A 10/14/99 controller performs the following functions: 1. Monitors the status of the front panel ON-OFF key. If the unit is off and the ON-OFF key is pressed, the controller will drive U10-6 high, which will enable power to the remainder of the instrument. 2.
  • Page 80 U302-5. Current limit is activated when the voltage at the sense line reaches 1V. The nominal DC voltage at Isense is about 0.5V when operating from battery only, and 0.7V when operating from AC. Then, current limit is set to 5Amps when Atlas in operating on battery and 3Amps when operating on Q303-s...
  • Page 81 Appendix A 10/14/99 1.4 Battery Charger: The battery charger is a PWM buck converter. The input to the battery charger is 12VDC from the offline switcher. The UC3843A, normally a current mode controller, is configured for voltage feedback mode. The UC3843A has an under-voltage lockout for Vcc<8.5V. The controller operates such that with Vcc less than 8.5V, the reference out is 0V, and will be at 5V with Vcc>8.5V.
  • Page 82 Appendix A 10/14/99 F301 4Amp Bat-fuse Battery To Linear Regulators Battery Charger Q308 L304 D307 Input to 5V and F302 MTP23P06V 47uH R327 MBRS340T3 3.3V linear 4Amp regulators. F302-2 AC+12V-fuse Q308-d C319-1 D307-A AC+12V L306 C340 Bead C337 C318 .047uF .047uF 330uF C319...
  • Page 83 Appendix A 10/14/99 +Vpump D310 MBRS340T3 HS302 Heatsink forQ312 Batt Charger input Q312 From Batery MTP30N06VL 6078 Charger Circuit. C323 C325 Battery 100uF Q312-g 100uF Q311 MTP30N06VL R346 U306 R348 LF33CV +3.3V C324 R347 +12V 1000pF R341 C324-2 C328 C329 C330 100uF .047uF...
  • Page 84 Appendix A 10/14/99 From the raw f+V and f-V voltages, the following supplies are generated for the various patient isolated circuits: 1. iso+5dig: Regulated 5V supply. This voltage is used to power the opto-isolators, digital control logic, and 5V digital supply for the Nellcor SpO2 board. 2.
  • Page 85 Appendix A 10/14/99 R605 R607 3.48K 464K Analog In iso+5Vdig fVcc R601 fVcc f+5V R608 U601-3 C603 f+5V 680pF R602 PWM-Out U602-3 73.2K U601-1 U602 R606 LM311 U604D f+5V U601A 3.48K 74HCT04 R603 MC34072 46.4K U601-2 C601 fVee fVee U604-10 A/D-sync R604 1000pF...
  • Page 86 Appendix A 10/14/99 fVee Mux-A/D-C Mux-A/D-B Mux-A/D-A Mux B U609 4051 Resp-LdsOff MuxB An-Resp Patient-Temp fVcc fVee Mux A U603 4051 MuxA f+1.24V Analog ECG Analog In fVcc 2.3 Serial Communication Serial data is transmitted to the isolated circuits through Optical Isolators. The following signals are transmitted from the CPU board to the isolated circuits: 1.
  • Page 87 2.5 ECG Circuits 2.5.1 Overview The front end will meet all applicable AAMI standards. Atlas provides a 5-wire front end, and will be compatible with both a 3-wire and 5-wire cable. Monitor (0.5Hz to 40Hz) Extended (0.05Hz to 100Hz) bandwidth will be provided. The ECG amplifier always transmits 0.05Hz to 100Hz data to the CPU board (unless in baseline restore mode), additional filtering for Monitor Bandwidth is implemented in software 2.5.2 Defib Protect, RFI Filtering...
  • Page 88 Appendix A 10/14/99 Defib Protect RFI Filtering R506 D506 5.1V +clamp fVcc R507 -clamp fVee D507 D501 5.1V MMBD1503A R501 R508 51.1K D501-3 To Buffer Amp N501 LAMP NEON C501 C506 220pF 220pF 2.5.3 Front End Buffer - 1st Gain Stage Gain of the first stage is 9.26 (1+10K/1.21K).
  • Page 89 Appendix A 10/14/99 Lead Select fVcc U505 Wilson 4051 Network mux- R529 R530 R531 R532 fVee R533 fVcc U506 4051 R534 mux+ R535 R536 R537 fVee 2.5.5 Differential Amplifier and Slew rate limit A traditional 3-opamp gain stage (U507 and U508) is used to construct the differential amplifier. The topology is modified slightly with the addition of slew rate limiting (U509).
  • Page 90 2N7002 2.6 Temperature Amplifier The temperature option of Atlas is designed to operate with YSI-400 series probes. This probe has a negative temperature coefficient, R@30C = 1815Ohms, R@40C = 1200Ohms. The temperature amplifier is configured as a non-inverting gain stage. The positive input to the amplifier is a 1.25V reference. The output of the temperature amplifier is V = Ref*(1+Rfb/Rthermistor).
  • Page 91 Appendix A 10/14/99 fVcc Temperature Amplifier R624 51.1K R626 U608-3 f+1.24V U608-1 Patient-Temp C633 .01uF U608A AD712 fVee C634 .01uF R625 -Clamp +Clamp D602 R627 1.21K BAV99L 0.1% C635 .01uF J601 Temp-In C636 Temperature CON2 2200pF Thermistor 2.7 Impedance Respiration 2.7.1 Overview Impedance respiration is accomplished by measuring a change of resistance across the patient’s chest during breathing.
  • Page 92 Appendix A 10/14/99 2.7.3 Differential Amplifier and Peak Detector The AC current driven though the patient develops a voltage across the RA to LA electrodes. This signal is measured and amplified with the Differential Amplifier formed by U702A/B. This amplifier converts the differential voltage across the patient to single ended signal, with a gain of 16.8.
  • Page 93 CPU board (Waveform data, SpO2%, and pulse rate). The Atlas monitor provides electrical isolation (power and data) for the SpO2 board. Note that you must use Nonin probes with the Nonin SpO2 board, and Nellcor probes with Nellcor SpO2 board.
  • Page 94 Appendix A 10/14/99 R235 R237 NIBP 3.48K 464K U209-Out U210-2 Analog-Input Converter P+5V C225 .047uF P+5V R230 P+12V C221 P+5V U208-3 .047uF R231 C219 C224 U210-7 73.2K .047uF 1000pF NIBP-PWM-ADC R234 U210 3.48K MAX941 U208-1 U210-3 U207B C218 74HCT00 4.7uF U208A R232 MC34072...
  • Page 95 Appendix A 10/14/99 1. >=10mmHg pressure for 295 seconds 2. >=15mmHg pressure for 175 seconds 3. >295mmHg pressure for 0.5 seconds. Software detected overpressure faults are considered application faults. The user is warned of a fault with an audible alarm and a ‘Check blood pressure cuff’ message on the CRT display. NIBP is not disabled for this type of fault.
  • Page 96 Appendix A 10/14/99 P+5V C226 L202 Primary .047uF Bead Transducer 0mmHG = 0.5V P201-pwr 300mmHG = 4.0V C232 .047uF R236 3.83K R212 56.2K P201-Out Gain P+12V C209 C206 .047uF Comp P201-6 .047uF P201 C227 XFPM-050KPGR-P1 680pF R219 U204-3 1.96K U204-1 PrimaryPres U204A MC34072...
  • Page 97 Appendix A 10/14/99 P+12V P+12V C216 Safety .047uF Transducer C211 .047uF TP226 R227 P202-Out+ 5.11K U206-1 U205-3 SafetyPres P202-2 U206A R223 C214 C217 U205A MC34072 21.5K .047uF .047uF MC34072 P202 FPNS-07PGR U206-2 C212 680pF P+12V R224 P202-Out- U206-7 P202-5 U206B R225 R220 MC34072...
  • Page 98 R248 CRT Deflection Board 5.1 Overview: Atlas uses a 5-inch monochrome CRT display. This CRT will display Waveform Data (ECG and Respiration or SpO2 orETCO ), plus Text Data (Heart Rate, Alarm Values, Trend Data, setup, and service menus). The CRT Deflection board performs the following functions: 1.
  • Page 99 Appendix A 10/14/99 Blanking Time: 1.2mSec Horizontal: Scan Rate: 31.5Khz Reset Time: 5uSec Blanking Time: 5.7uSec 5.2 Vertical Amplifier: 5.2.1 Ramp Generator: Vertical Sync Ramp Generator U1.3 +12V 7.50K 750uSec .047uF 16.7mSec 23.7K Ramp U4.2 Vsync TLC272 Vertical 74HCT04 Sync 1.96K 5.0V 5.11K...
  • Page 100 Appendix A 10/14/99 5.2.2 Vertical Amplifier: The Vertical amplifier will generate a linear current ramp of +/-200mA. The vertical amplifier is an H- Bridge type driver. Positive current flow (deflecting the beam above the centerline) is defined as current from +12V to Q1 to Rsense through the coil to Q4 to Ground. The negative current path is from +12V to Q3 through the Coil to Rsense to Q2 to Ground.
  • Page 101 Appendix A 10/14/99 5.3.1 Horizontal Gain: Horizontal deflection is adjusted by changing the current through the Horizontal coil. Changing the series inductance in the Horizontal Deflection Path modifies the current. Increasing Horizontal gain is then accomplished by writing a pattern to the CRT, and adjusting the “width coil”, L3. Horizontal Centering: Horizontal centering is accomplished by rotating magnets mounted on the CRT Yoke assembly.
  • Page 102 74HCT04 Recorder Electronics 6.1 Overview: Atlas includes a thermal strip chart printer (optional on Model 200 and 210, standard on model 220). The user can print either annotated waveform data or Patient trend information. The printer specifications are: Paper Size:...
  • Page 103 5.11K 6.3 Motor Driver: Atlas uses a stepper motor to drive the paper. The microcontroller (U3) is programmed to apply the appropriate phased signal to the motor. A quad darlington switch (U6) amplifies the signal from the controller to signal levels needed to drive the motor. Motor speed timing is derived from the main CPU,...
  • Page 104 Appendix A 10/14/99 +24V +24V TP26 1.47K .047uF U3-10 .047uF 47uF d6-c TP27 ULN2065 U3-clk ClkIn/Osc1/RB5 1.47K u6-3 J3-1 U3-9 u6-6 Clkout/Osc2/RB4 u6-11 J3-3 TP67 n24Von u6-14 J3-4 Vpp/MCLR/RB3 J3-6 RC5/TOCK1 CLMP1 u6-clmp CLMP2 CON6 1.47K Connector Pin # PIC16C505 U3-8 TP28 phase...
  • Page 105 Atlas Repair Parts Part Number Description 6200-43E SERVICE MANUAL 620001-501 MAIN PCB ASSY - LOW END 620004-501 ATLAS CPU PCB ASSY 620007-501 FRONT PANEL DISPLAY PCB ASSY 620013-501 PRINTER PCB 620016-501 MAIN PCB ASSY - MID/HIGH END 620032 ETCO2 PCB ASSY 620034 ETCO2 CONNECTOR &...
  • Page 106 Appendix B Atlas Repair Parts Part Number Description 620201-501 POWER SUPPLY ASSY (LOW END) 620201-502 POWER SUPPLY ASSY W/FAN 620202-504 MAIN HSG ASSY W/BATT & PRNTR 620205 4-40 X .31 TX PN MC ST ZN 620207 NUT, M3-.5 HEX KEPS ST ZN...
  • Page 107 WITH SWITCH TEMP FERRITE THESE DRAWINGS AND SPECIFICATIONS AR E THE PROPERTY OF WELCH ALLYN, INC. AND SHALL NOT BE REPRODUCED, OR COPI ED, OR USED AS A BASIS FOR MANUFACTU CABLE ASSY OR SALE OF EQUIPMENT OR DEVICES WITH OUT WRITTEN PERMISSION.
  • Page 108 Atlas Drawings and Schematics Drawing Number Rev. Sheet No. Size Name Description 620002 1of 6 Main Board - Model 200 Schematic 620002 2 of 6 NIBP Electronics Schematic 620002 3 of 6 Power Supply DC/DC Schematic 620002 4 of 6...
  • Page 109 .047uF TPA301 Rec-Motor-Step U9-3 +12V Print-Temp Rec-Data-Latch 0.1uF Rec-Strobe Rec-Clock Rec-Data 19.6K .047uF .047uF CON24B 220pF Welch Allyn Inc. Rec-GND Initial Date Recorder Drawn Schematic: 620002.dsn Rick Myers Mar 5, 1999 Board Designed Mar 5, 1999 Rick Myers Connector Title...
  • Page 110 RT/CT ISENSE C319 C320 100uF .047uF C310 2200pF R308 27.4K TP310 U301-5 TP309 R309 Welch Allyn Inc. Initial Date TP312 Drawn Schematic: 620002.dsn Rick Myers Mar 5, 1999 5Vref Designed Rick Myers Mar 5, 1999 Title Power Supply - DC/DC...
  • Page 111 P+12V TP236 Zero R221 R226 C215 R233 .01uF NIBP-ADC-Clock 3.16K TP237 21.5K .047uF 3.48K Offset D201-C TP238 Welch Allyn Inc. D201 Initial Date U205-7 MMBD1503A U207-3 Drawn Schematic: 620002.dsn Rick Myers Mar 5, 1999 TP234 C213 R222 U205B Designed Rick Myers...
  • Page 112 HCNW4503 R414 TP423 TP424 Q403-e iso402-a 6.19K R421 u411-6 SpO2Out C422 C423 .047uF 1000pF Welch Allyn Inc. Initial Date Drawn Schematic: 620002.dsn Rick Myers Mar 5, 1999 Designed Rick Myers Mar 5, 1999 Title Power Iso and SpO2 interface Checked L.Phillips...
  • Page 113 Sw-RLD-LL LAMP NEON C505 220pF U503A R525 MC34002 Sw-RLD-LA R516 RL-mux R526 Sw-RLD-RA U503-2 fVcc TP559 RLD Amp Welch Allyn Inc. fVee Initial Date DG202CSE R527 fVee C514 Drawn Schematic: 620002.dsn Rick Myers Mar 5, 1999 0.1uF C514-2 Designed Rick Myers...
  • Page 114 U601-7 52uSec Integrator f+5V Input 781uSec (U604-10) Comparator Inputs Analog In U604F 74HCT04 PWM-Out (U604-8) Welch Allyn Inc. Initial Date PWM-timer Drawn Schematic: 620002.dsn Rick Myers Mar 5, 1999 Designed Rick Myers Mar 5, 1999 Title ECG A/D and Interface Checked L.Phillips...
  • Page 115 AMD RY/BY#: 15 ---------------- MICRON N/C: 9, 10, 15 MICRON Vpp: 13 Byte# VDDH CS_n0 GPL1 RY/BY# SRESET_n RESET# TP55 Welch Allyn Inc. Initial Date Drawn Schematic: 620005.dsn Jim Belesiu Mar 5, 1999 Designed Jim Belesiu Mar 5, 1999 Title...
  • Page 116 VDDH R68 24.9K 330pF SPICLK R69 12.4K CONFIG_DONE PC11 SPIMOSI R70 6.19K R71 3.09K R126 R72 1.58K TP80 Welch Allyn Inc. Initial Date Drawn Schematic: 620005.dsn Jim Belesiu Mar 5, 1999 Designed Jim Belesiu Mar 5, 1999 Title Checked FPGA L.
  • Page 117 Welch Allyn Inc. Initial Date Drawn Schematic: 620005.dsn Jim Belesiu Mar 5, 1999 Designed Jim Belesiu Mar 5, 1999 Title Checked Atlas CPU Subsystem L. Phillips 3/19/99 Approved Size Document Number 3/19/99 Z. Psenicnik 620005 Release For Production J. Bello 3/19/99 Date:...
  • Page 118 NIBP2-PW-ADC TIN3 IP_B7 C123 C124 C125 C126 IP_B[2:7] 330pF 330pF 330pF 330pF DREQ1_n DREQ2_n On-Standby-Key Welch Allyn Inc. Initial Date Drawn Schematic: 620005.dsn Jim Belesiu Mar 5, 1999 Designed Jim Belesiu Mar 5, 1999 Title I/O Filters Checked L. Phillips...
  • Page 119 CLKOUT MODCK2 EXTCLK TEXP DSCK IP_B[2:7] DSDI IP_B[2:7] DSDO VFLS0 ALE_B VFLS1 TRST_n WAIT_B_n Welch Allyn Inc. Initial Date Drawn Schematic: 620005.dsn Jim Belesiu Mar 5, 1999 Designed Jim Belesiu Mar 5, 1999 Title PowerPC MPC823 CPU Checked L. Phillips...
  • Page 120 2.0V Vbackup Input Reset_n PORESET_n 100nF C118 C119 6.8uF 100nF 330pF 100nF 6.8uF 330pF Welch Allyn Inc. Initial Date Drawn Schematic: 620005.dsn Jim Belesiu Mar 5, 1999 Designed Jim Belesiu Mar 5, 1999 Title Power Distribution, Clocks and Reset Checked L.
  • Page 121 LED group Front Panel - D 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF Place one ceramic cap near each Welch Allyn Inc. Initial Date Drawn Schematic: Jim Belesiu 3/15/99 Designed 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 122 TP87 RH Adjust (+) 74HC165 SW19 Key-Latch-b RH Adjust (-) TP88 SW20 BP Auto Clock1 Key-Clock-b SW21 BP Start-Stop Silence-Switch Welch Allyn Inc. Welch Allyn Inc. Initial Initial Date Date 620008.dsn Drawn Drawn Schematic: Schematic: Jim Belesiu 3/15/99 Designed Designed...
  • Page 123 7-SEG LED 0.36 u17-9 TP60 u18-9 TP61 TP62 TP63 TP59 LED-TP-Enable LED_TP_Enable Clock2 LED_TP_Clock LED-Latch-1 LED_TP_Latch u19-out LED_TP_Data_Out Welch Allyn Inc. Initial Date 620008.dsn Drawn Schematic: Jim Belesiu 3/15/99 Designed Jim Belesiu 3/15/99 Title Temp/Pulse LED Drivers Checked 3/24/99 L. Phillips...
  • Page 124 SRCLK u13-3 SRCLR u13-4 d25-a u13-5 d26-a RCLK u13-6 d24-a u13-7 d22-a 74HC595A Welch Allyn Inc. Initial Date 620008.dsn Drawn Schematic: Jim Belesiu 3/15/99 Designed Jim Belesiu 3/15/99 Title NIBP LED Drivers Checked L. Phillips 3/24/99 Approved...
  • Page 125 TP173 TP172 No Load d18-c SpO2 Lo TP176 TP174 T1.75 (5mm) Green Clock1 LED_SpO2_Clock LED-Latch-2 LED_SpO2_Latch LED-SPO2-Enable LED_SpO2_Enable Welch Allyn Inc. Initial Date 620008.dsn Drawn Schematic: Jim Belesiu 3/15/99 Designed Jim Belesiu 3/15/99 Title SPO2 LED Drivers Checked L. Phillips...
  • Page 126 .01uF .047uF q8-b 2N3904 19.6K 74HCT04 q8-e vidout 1N4148 u4-6 q7-g BS170 No Load 74HCT04 Welch Allyn Inc. Initial Date Drawn Schematic: 620011.dsn Rick Myers Mar 4 1999 Designed Rick Myers Mar 4 1999 Title CRT Deflection Board Checked L.Phillips...
  • Page 127 1.47K PIC16C505 U3-8 phase J3-1 TP28 J3-3 J3-4 MC34072 J3-6 TP29 1.47K CON6 u1-7 U3-7 Welch Allyn Inc. Initial Date Drawn Schematic: 620014.dsn Rick Myers Mar 5, 1999 Designed Rick Myers Mar 5, 1999 Title Printer Electronics 74HCT04 Checked L.Phillips...
  • Page 128 4Vpp max. TP23 U9-3 (pg 1) 1.21K Rec-GND Rec-GND PIC-Data ClkIn/Osc1/RB5 0.1uF CON24A On/Off-Key Clkout/Osc2/RB4 (Front Panel Key) 1.21K Welch Allyn Inc. Vpp/MCLR/RB3 PIC-Clk 19.6K Initial Date Rec+DCV TP12 TP24 TC5/TOCK1 TP26 Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999...
  • Page 129 TP236 Converter Zero R221 R226 C215 R233 .01uF NIBP-ADC-Clock 3.16K TP237 21.5K .047uF 3.48K Offset D201-C TP238 Welch Allyn Inc. D201 Initial Date U205-7 MMBD1503A U207-3 Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999 TP234 C213 R222 U205B Designed Rick Myers Mar 5, 1999 .01uF...
  • Page 130 R424 U411-6 TP467 SpO2Out J402 C436 SpO2-Reset 1000pF s-5V s+5V iso+5Vdig CON14AP C427 C428 C429 Welch Allyn Inc. 10uF .047uF .047uF Initial Date Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999 Designed Rick Myers Mar 5, 1999 Title Power Isolation and SpO2 Interface Checked L.
  • Page 131 TP721 R713 D706 R710 MMBD1503A 464K fVee Resp-Reset U702-6 TP715 R714 R723 15.8K 1Meg Welch Allyn Inc. Initial Date Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999 Designed Rick Myers Mar 5, 1999 Title Respiration Checked L. Phillips 3/16/99...
  • Page 132 D309 U304-5 Q309-3 BAV70L U304B R336 TP348 RT301 MC34072 7.5K R337 Q310-c TP350 Float Voltage 8.87K R344 Welch Allyn Inc. Initial Date AC+12V-fuse Q310 ACON 620017.dsn Bat-Adj MMBT3904L Drawn Schematic: Rick Myers Mar 5, 1999 R338 Designed Rick Myers Mar 5, 1999...
  • Page 133 51.1K fVee Right-Leg D505-3 TP550 RL-mux R526 DG202CSE N505 TP551 U503-2 TP559 LAMP NEON C505 RLD Amp Welch Allyn Inc. 220pF Initial Date R527 fVee C514 Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999 0.1uF C514-2 Designed Rick Myers...
  • Page 134 74HCT04 C647 100pF D601 TP633 MMBD1503A 52uSec Integrator Input 833uSec (U604-10) Comparator Inputs Analog In Welch Allyn Inc. Initial Date Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999 PWM-Out (U602-7) Designed Rick Myers Mar 5, 1999 Title ECG A/D and Interface Checked L.
  • Page 135 C810 .047uF U802-15 .047uF U804 R808 Q801 R807 HCNW4503 MMBT3904L 6.19K iso802-a q801-e RS423Rx TP809 Welch Allyn Inc. Initial Date Drawn Schematic: 620017.dsn Rick Myers Mar 5, 1999 Designed Rick Myers Mar 5, 1999 Title Serial Communication Checked L. Phillips...
  • Page 148 Appendix E Equipment for perfoming Safety Tests on the Atlas Monitor: CAUTION : High Voltages are generated and used during the HI-Pot or Dielectric Test. DO NOT OPERATE THIS EQUIPMENT AND OR RUN THIS TEST UNLESS YOU HAVE BEEN PROPERLY TRAINED AND ARE QUALIFIED...
  • Page 149 11. Record All-Earth:Norm and All-Earth:Rev result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf. 12. Press Patient Leakage uA #7. 13. Record Patient Leakage result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf. 14. Turn off Atlas Monitor.
  • Page 150 8. Record All-Earth:Norm and All-Earth:Rev result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf. 9. Press Patient Leakage uA #7. 10. Record Patient Leakage result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf. 11. Turn off Atlas Monitor.
  • Page 151 A. Plug modified ECG cables into ECG connector at front of Atlas unit. B. Connect the modified AC cord (hot, neutral, and earth ground connected) to the back of the Atlas Monitor. C. Connect the black lead banana plug to the return jack of the Hypot 3500 Dielectric tester.
  • Page 152 A. Plug modified RS232 cable (all wires connected) into the RS232 connector at rear of Atlas unit. B. Connect the modified AC cord (hot, neutral, and earth ground connected) to the back of the Atlas Monitor. C. Connect the black lead banana plug to the return jack of the Hypot 3500 Dielectric tester.
  • Page 153 Atlas Test Results Patient Leakage test (10uA Maximum) Mains on applied part (50 uA Maxlmum) tarth Resistance (printer only) (.200 Ohms Max) Dielectric Withstand Test Results Mains to tarth @ 1.5kV (3mA Max) Mains to tarth @ 4.0kV (3mA Max)

This manual is also suitable for:

6200-43e

Table of Contents