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2. AFE connector AFE Connector A A Z NO 4 9 lining 108 RISC Contra i B Xt trl zi 1 Z iB lt M Ctrl TGC amp Param T RTSC SCNV Input Avg Memory Master osc Sum amp Buffer Mem E E 9 Hand 5 v Main Boot PROM Gray Scale RAM DRAM Flash Mem Scan Buffer Clock NVRAM Convert Control d ZEE gt 1 Puo T wa Bus Buffer B 3 Ceri Graphics Memory H Display Memory 1 Mj es sn 4 g Video DAC CPU CPU Support SCNV Chip 7 57 CPU VO Fig 8 3 4 Core Board The Core board consists of three main blocks CPU system RTSC and Scan Converter CPU system This is a 386EX based CPU system It has two serial ports used for keyboard Front panel and debug terminal Also embedded in the system is a Floppy disk controller Memory system Foot switch together with the Configuration switch register The Graphics system which generates e g text and markers on the screen is also a part of this system Real time Scancontroller RTSC Contains the hardware for programming the Front End Delay board and for generating all reference timing signals for acquisition of image data It consists of the following modules 120 MHz master oscillator Sequencer TCG Parameter memory and Buffers drivers for control busses The sequen
3. 3 2 3 1 1 Necessary Equipment to Perform the Checking 3 2 3 2 3 2 3 2 1 3 2 3 2 2 AET 3 3 3 2 3 Betore Power Up pn ende tied tint ms 3 3 3 2 4 Mag fade 3 3 3 2 5 Test Oscillators 3 4 3 9 Monitor Checking ecrire etre A SAVAA RNANA NNER NKEA VRAA VASANN KAAVERE ARAN 3 7 3 4 5 3 8 3 5 nadie 3 8 3 6 cem CRI 3 8 XS E E 3 8 38 L 3 8 3 9 RAC E E E 3 8 3 10 Image Processing 3 9 3 11 3 9 3 12 ZOOM 4 ee eee 3 9 3 13 LUI IEEE 3 9 3 14 Image Et 3 10 3 15
4. Fig 8 3 2 shows an example of 16 signal lines connected to two sections of the delay chain The signals RMX 1 16 is generated by folding the 32 channels used in the 1101 scanner The crosspoint switches connects the RMX signals to different sections of the delay line where each bank even odd is switched at 10 Mhz The fact that the signals are switched at 10 Mhz creates a zone switching system with thousand of different zones Switching noise is removed by using an empty scanline at the beginning of each new sector scan switching noise is digitized and stored in a RAM During the remaining lines of the following sector scan the noise reference values are digitally subtracted from the echo signal 1101 8 7 Theory of Operation System 1101 Merlin ZE 0726 Delay Chain with 96 tap driver inputs Single Transducer Input gt Beam gt Output T T 1 1 Ee ns 288ns 288ns gt 576 ns H 576 ns 57
5. Potential Terminal connected to the chassis Should be connected to Equalisation corresponding terminals on other equipment to eliminate potential differences Protective Additional Protective Earth t Earth CF Isolated from earth Maximum Patient Leakage Current under Normal Condition lt 10 Single Fault Condition lt 50uA n Type BF BF Isolated from earth Maximum Patient Leakage Current under yp 9 Normal Condition lt 100 Single Fault Condition lt 500nA n Type BF BF DEFIBRILLATOR PROOF Maximum Patient Leakage Current under Normal Condition lt 1001 Single Fault Condition lt 500nA IP57 SEALING Dust and immersion protected according to IEC Publication 529 Stand by Push button for switching the scanner from stand by to active The power supply cord is the means of separation from the main power supply 2 Off Main power supply off On Main power supply on Non ionizing Ultrasound Scanner emits acoustic radiation A radiation STERILE Device is in a sterile condition Table 1 safety symbols 1101 System 1101 Merlin General Information WARNINGS and CAUTIONS For your own and others safety please read the following carefully Warnings e Opening the instrument can expose live parts Any work done on the open instrument with power on must only be done by Medical or their authorised rep
6. 4 4 4 888 1 6 1 4 1 Checking Procedure Section 3 1 6 1 4 2 Troubleshooting Section 4 1 6 1 4 3 Adjustment Procedure Section 5 1 6 1 4 4 Mechanical Parts Section 6 1 1 1 1 6 1 4 5 Preventative Maintenance Section 7 1 7 1 4 6 Electrical Safety ilice iiris e ee did e diae da 1 7 1101 1 1 General Information System 1101 Merlin 1 1 Safety Aspects The 1101 System complies with IEC 60601 1 safety class I The 1101 System is classified as follows Array Input Module Type B Body Single element Transducer Module Type B Body Note Some transducers available with the 1101 are however classified as BF Refer to the attached Safety Test Records in this chapter Terms and Symbols used 1 2 Throughout this manual the following terms are used to indicate a situation where safety precautions are required WARNING CAUTION Indicates a situation involving risk of injury or loss of life to personnel or patient Indicates a situation involving risk of damage to the instrument or other equipment connected Name Description ATTENTION Consult ACCOMPANYING User Guide BB0340 when this sign is encountered on the instrument to avoid reducing its safety
7. Revision level in this case E Bar Code Label The Part number of the board for example 200761 is the order number of the board The number is changed if the modification of the existing PCB is found to be too extensive The serial number of the board is a unique number used for tracking purposes The revision code ABCDEFGH is related to the modifications made on the board The revision letter is marked when modifications are made When boards are ordered from the B K Medical stock it is important that the serial number of the scanner is stated The serial number ensures that the correct revision is shipped The PCB version number e g 3 is printed on the circuit board 1 5 General Information System 1101 Merlin 1 4 Special Tools and Equipment The tools and equipment listed below does not include standard tools and commonly used equipment Checking Procedure Section 3 e Transducer Phantom model 254 WQ 0973 for checking a 1101 system equipped with Array and Single element Transducers e Transducer Phantom type 251 WQ 0972 for checking a 1101 system equipped with the Endosonic Probe 1850 e Ruler for checking the size of the image on the monitor e Floppy disk 3 5 for testing the floppy disk drive Further it is recommended to bring a 150 ml bottle containing preserving fluid for the phantom s Prescription for preserving fluid 94 ml Glycerol 85 50 Rodalon 1
8. eee adole estes 4 3 4 3 3 Transducer Or Scanner 4 3 4 3 4 No Echo Informoatlor itte ir ete e tette eb tete ee tp baee rt beta e bead ne 4 4 4 4 The Test Oscillatots Rer 4 5 4 4 1 The Scancon Test Oscillators Core 4 6 4 4 2 The Delay Test Oscillator FE Delay eene 4 7 4 4 3 Thie Input Test Osclllator nini nenne ee MERC 4 8 4 4 4 The Singlelnput Test Oscillator 4 9 4 4 5 Monitor 2 i 4 9 4 5 ceeds ea eere re Eae 4 10 4 5 1 Troubleshooting the Power een enn ener enne nennen 4 10 4 5 2 The Voltage LED amp ede s d 4 10 4 5 3 Block Diagram of the Power 5 4 10 4 5 4 Power Supply 4 12 4 6 MONNIT osa EEUU 4 12 4 6 1 Monitor Disassembling 4 12 4 6 2 Missing picture 4 12 4 7 Software update te HERE e e dre e eee Eft 4 13 48 Error Fog on Core Board eterne etablieren italien 4 14 BI 1101 B 4 1 Troub
9. A Analog Test Osc Digital Test Data C SW Gen Test Data Power Indicator LEDs 0 Test Plug Scan SCNV Plug Bd y 1101 Test Block Fig 8 3 7 Test Facilities in Ultrasound Scanner 1101 Optional Single Transduce Module ZH0696 Optional Floppy Drive 010018 PSU amp Cooling The Analog Front End oscillator operates at 5 003 MHz and are connected to all 32 signal lines via small capacitors The test is a verification of the receiver delay and the scanconverter The delay part of the Front End Delay board has three test possibilities for generating test pictures on the monitor Delay test 1 is a verification of the digital noise reduction system The test signal is generated in a FPGA on the delay board Delay test 2 is a verification that all 32 channels from the Front end Delay board are active Delay test 3 is a verification that all 16 inputs on the beamformer are working Both Delay test 2 and 3 uses the Input test osc for generating the test signal The Core board has a digital test oscillator for generating test pictures and a software test oscillator for setting up monitor test pictures 8 14 1101 System 1101 Merlin Theory of Operation 1101 8 15 System 1101 Merlin System Interconnections Section 9 SYSTEM INTERCONNECTIONS CONTENTS PAGE Introduction
10. H A K L M Vertical frequency s Q gt lt R 5 gt CCIR 50 Hz EIA 60 Hz 64 usec 960 pixel 63 5 768 pixel 30 24 190 154 640 530 100 60 20 msec 312 5 H 2 5 5 2 5 H 10 H 2 5 5 2 5 10 H 38 H 240 H 34 H 16 67 msec 262 5 H 28 H 200 H 24 H 1101 System 1101 Merlin Dip switch setting 1101 System Interconnections Place the Scanner on the side to access the DIP switch underneath the scanner DIP switch Default position Up Towards the edge of the scanner Com 2 Inside scanner SW1 Language Up User definable Down English SW2 RS232 A Up Standard Down Enhanced Report using BKCOM program SW3 TV Standard Up PAL Down NTSC SWA Not Used SW5 Debug Com Port Com 1 On the Back panel of the Scanner SW6 Not Used SW7 Not used SWws Debug Terminal Up Off Down On For reading of Error Log Note If Switch 1 is set to user definable then the language should be selected in the System setup menu refer to the User Guide 9 5 System Interconnections System 1101 Merlin Multi pin Connections external The following section describes the multi pin connectors situated on the rear of the 1101 Fig 0 1 Copy Doc trigger Fig 0 2 Footswitch Fig 0 4 Interface RS232 A 9 6 1101
11. 6 13 6 2 Exploded VIews 5 rie AANER ANARAN ERANS 6 15 6 21 1101 egies eee 6 16 1101 6 1 Mechanical Parts System 1101 Merlin Dismantling and Reassemble Procedures Handle and Cover 1 Disconnect the mains cable remove transducer s from the transducer connector s 2 Remove the two hinge covers using a 2 mm Allen key see Fig 6 1 1 Fig 6 1 1 Removing the two hinge covers 3 Unscrew the two screws M4x8 and M4x30 holding the handle and remove the handle see Fig 6 1 2 Fig 6 1 2 Removing the handle 6 2 1101 System 1101 Merlin Mechanical Parts 4 Unscrew the two screws M4x8 on the back see Fig 6 1 3 Fig 6 1 3 Screws for the cover 5 Remove the cover see Fig 6 1 4 Note that the cover is fixed in the two brackets so it has to be pushed up a few cm and then spread apart from the keyboard hinge Fig 6 1 4 Removing the cover 1101 6 3 Mechanical Parts System 1101 Merlin Remove the keyboard Remove the handle and cover as described in section 0 1 Unscrew four nuts M4 holding the front plate two on each side see Fig 6 1 5 Fig 6 1 5 Nuts holding the front cover 2 Slide up the front plate 3 Unscrew the two screws M3x8 in each side holding the keyboard assembly see fig 6 1 6 4 Lift up the console
12. 3 10 3 16 Split SCHOOM 3 10 3 17 Image Storage 3 10 1101 3 1 Checking Procedure System 1101 Merlin Introduction The Checking Procedure is to verify proper operation of the main functions of the 1101 System The procedure should be used during installation incoming inspection preventative maintenance and before and after repair The procedure is arranged in sections and must be followed from the beginning when performed Notes If the Checking Procedure cannot be performed successfully or if there is a specific fault in the System refer to Section 4 TROUBLESHOOTING or Section 5 ADJUSTMENT PROCEDURE The Checking Procedure does not include a check of the different transducer types If in doubt about the functions of the 1101 you should consult the user guide 0800 Important Any inside repairs performed on the 1101 must be followed by an Electrical Safety Test Necessary Equipment to Perform the Checking Procedure e Transducer Phantom model 254 WQ 0973 for checking a 1101 system equipped with Array and Single element Transducers e Transducer Phantom type 251 WQ 0972 for checking a 1101 system equipped with the Endosonic Probe 1850 e Ruler for checking the size of the image on the monitor e Floppy disk 3 5 for testing the floppy disk drive Array Transducer Linear or Convex e Sector Transducer for systems
13. Press Persistence F5 and step trough the four different settings by pressing F5 successive 4 is max persistence Press to select the default puncture guide for the selected transducer if applicable and check that puncture dots appear in the B image field Press and check that a white frame appears on the screen Dependent on the setting in System Setup the frame will have a zoom or panning function Check by using the tracker ball that the frame can be moved to any position Press the control to adjust the size of the zoom frame Press the control to be able to move the zoom frame again if necessary The scanner will automatically zoom in on the selected area when you have finished resizing and moving the frame To move or resize the zoom area Press 6 the image is shown in full size adjust the frame size and location and the scanner will automatically zoom in on the new area To turn off the Zoom function press for more than 1 second Freeze the image and press place set of distance markers the monitor Check that the distance between the markers are read out Press to move the other marker Activate another set of markers by pressing Check the Area and Volume determination using the Draw or Ellipse methods Press Press Draw Press to start drawing use the trackball to draw move the cursor Press to stop drawing and check the readout of area an
14. 1 3 General Information System 1101 Merlin 1 2 System Overview Front View Floppy disk drive Fig 1 2 1 Identify the main parts Rear View Keyboard lock Handle Transducer holder ON OFF Video IN OUT Array transducer input Single element transducer input Fig 1 2 2 dentify the main parts 1 4 BI1101 B System 1101 Merlin General Information System Configuration The Diagnostic Ultrasound System 1101 is a portable multipurpose ultrasound scanner for B and M mode examinations Modules and PC Boards Part Number Description ZE0732 Front End Delay Board FE DLAY 200761 Core Board 2 0689 Motherboard ZH0690 Board AQ1674 Cable Board Motherboard ZV0056 10 Monitor 260342 Power Supply 2 0023 0256 Track ball 2 0688 Potentiometer and Gain Board 2130014 Keyboard Complete incl of 256 ZH0688 010018 Floppy Disk Drive AQ1673 Cable for Floppy Disk Drive 2130020 Single Element Transducer Module Not available for type 1101 1 1 3 Revision System 1101 All PC Boards the 1101 are described by the board name Type number Revision code ID and PCB Version The name of the board indicates the function of the board for example the Core Board The name of the board is changed only if the function of the board changes 700761 001 837 B K Medical A S Serial Number
15. The Front end Delay board consist of one array transducer connectors 32 receivers with preamplifiers and TGC a board control system a transmit rotate circuit 32 transmit pulse amplifiers and a test oscillator The array transducer connector is 96 pin connector that fits the type 85XX array transducers The transducer code interface circuit translate the transducer codes to a serial data stream which is sent to the core board The Board control which is set up by the Core board holds the xmit RAM transmit timing which is loaded with the beam profile of the active transducer The 16 channels transmit timing data are sent to the Transmit rotate block where they are folded and rotated digitally The resulting 32 channels bits pulses are then amplified in the Transmit amplifier and finally sent to the transducer The output of the transmitters is controlled by a set of 8 bit D A converters The Receiver circuit consist of 32 current preamplifiers and TGC stages driving the receive derotate multiplexer The TGC Amplifiers compensates for the attenuation of the ultrasound wave in human tissue This is done in a voltage controlled amplifier by increasing the gain with time that is the greater the depth of the echo signal the greater the degree of amplification The purpose of having transmit receive channels is to focus the ultrasound in one point the focal point The 32 echoes received by the 32 transducer crystals are therefore equivalent
16. 1101 Merlin The Scancon Test Oscillators Core Board An array transducer must be connected and active to start this oscillator Press F3 Scancon osc to toggle between Scancon test 1 2 and 3 Q 554 10 39 36 7 5 0 0 10 45 30 7 5MHz x 0 0 Fig 4 4 3 Scancon Test Oscillator 3 4 6 1101 B System 1101 Merlin Troubleshooting The Delay Test Oscillator FE Delay board Power off disconnect all transducers and power on the 1101 Press Shift Alt and Probe X and then press F2 Delay Test to toggle between Delay osc 1 2 and 3 0 10 05 856 10 57 01 3 5 0 0 Fig 4 4 4 Delay Test Oscillator 1 The DELAY TEST 1 is a verification of the digital noise reduction It is controlled that data can be written to the noise reduction frames and that the signal compression is functioning The image consist of concentric bands which gradually goes from black to white light grey and then back to black Pre requisite The Scancon Test must pass Q Q 10 50 35 3 Fig 4 4 5 Delay Test Oscillator 2 DELAY TEST 2 is a verification that all 32 channels from the FE Delay board are active Four circular bands are shown one for each delay component Each of the rectangles consist of 16 narrow bands One for each Tap Driver Note If changing size after the test is activated you may only see some of the four bands Pre requisite Input Test Oscillator and De
17. Earth Norm Leakage Earth Rev Leakage 2 2 kV DC Mains Signature 1 of 1 test complies with IEC 60601 1 regulations for medical equipment safety class Important High Voltage testers deliver hazardous currents Therefore these testers should only be operated by technicians who are aware of the hazards involved The complete test must always follow immediately after a repair made on the 1101 Ultrasound Scanner and always on the fully assembled unit Protective GND General remarks and settings for Test no 5 Tester Rigel 233 Cables Mains cable for scanner clip probe lead Rigel accessories Basic settings 1101 mains switch ON Rigel switch settings Class l Calibrate Rigel Connect clip probe lead between PROBE and GND in IUT POWER socket Press TEST and zero ohm meter Connect the scanners Main cable from IUT POWER Rigel to power inlet on the scanner 1 Connect the clip probe lead between PROBE Rigel and the left GND connector on the back of the scanner Press the TEST button and record the resistance Disconnect the power cable for the monitor Note As the test current is 25 Amps it is important that the clip probe lead is held firmly against or clipped to the GND connector before the TEST button is pressed 2 Move the clip probe to the metal the array transducer connector Press the TEST button and record the resistance 3 If single module installed Move the cl
18. LLH Ver 2 10 file Overall12 vsd uoneJedo jo 10941 USI LOLL W JSAS System 1101 Merlin Theory of Operation PC Board Description This section provides an overall description of each board explaining the main function of all function blocks on each board Front End Delay Board Block diagram 1101 Front End Delay board Digital Control for Derotate and TEST Front End Delay board Focus Switch osc ZE0732 Matrix Output to B picture 32X Current Drivers Antialiasing 96 pin Transducer Em RECIEVERS Derotate 16x TGC 2 FilterBank Connector Conn TORI 32 RX OUT 32 Multiplexer 16 RMX 16 4 Focus Switch Low Pass ZN0621 E cm TGC 1 32 16 apodizing Matrix pu 5 Noise lt Reduction 43x LINE NR Tap Drivers System and Transducer Control TRANS and Signal 2 CodeConverter MITTERS Delay Chain Compression TGC 2 CONTROL and Apodizing iz gt Select and Band Pass C EE Amplifier FilterBank Digital R T S C BOARD NS EY transmit Core Board FE BUS 16 TRANSMIT TIMING 16 Rotate 16 32 Input from Single Transducer DRW_ID Des_0392 doc 17 05 00 Fig 8 3 1 Front End Delay board
19. VP2767 CB2100 10 26 2001 08 48 14 appears when the system is starting in the boot prom Then it starts loading the main software from the Flash prom into the RAM this is indicated with a number Byte counting up As the last sequence the task is changed to the main software switching task Type 2100 LOADER VP2767 CB2100 10 26 2001 08 48 14 P F00 Loading from prom to ram Reading data Id Rel V1 20 CB2100 04 15 2002 10 51 35 2863956 Switching task Loss of use set up Fig 4 3 1 Booting sequence on the monitor screen Check the lithium battery on the Core board also check for bad contact Transducer or scanner 1101 B e First of all Try another transducer f possible connect a single element transducer to bypass most of the FE Delay board Radial or Vertical lines The problem is most likely caused by the FE Delay or the transducer Use the Test Oscillators to isolate the fault Shift Alt and Probe X Concentric rings or Horizontal bands If concentric rings or horizontal bands are visible in the B image the FE Delay board should be suspected Use the Test Oscillators to isolate the fault Shift Alt and Probe 09 4 3 Troubleshooting System 1101 Merlin Noise pattern in the B image A noise pattern in the far field is often caused by external noise entering the scanner trough the air or via the mains cable To isolate the problem check try the following e Conne
20. What to do Try another transducer Switch off and disconnect the keyboard and the monitor Switch on and observe the status of the LED s If the Low V LED is on the keyboard or the monitor may be defective Search for the short circuit in the Console is done by successively pulling out the PC boards Remember to switch off the 1101 before the boards are removed The power supply itself is checked by removing the supply from the 1101 and measuring the voltages on the power supply plug Refer to Fig 4 5 3 Note The measured voltages does not reflect the tolerances from Table 4 5 1 as these are the values when the supply is loaded The Power Supply HV output can not operate with the power plug disconnected from the motherboard By short circuiting pin 4 and pin 14 on the power supply plug the green HV LED on the power supply should be on and from 68 to 76 Volts should be present at pin 12 Ref pin 10 and from 68 to 76 Volts should be present at pin 24 Ref pin 10 Fig 4 5 3 PWR supply plug Pin In Output Pin In Output 1 HVCTRLO 13 HVCTRL1 2 HVCTRL2 14 HVCTRL3 3 3 3VD 15 GND 4 5VD 16 GND 5 5VD 17 GND 6 5VA 18 5VA 7 5VA 19 GND 8 12VA 20 GND 9 12VA 21 GND 19 GND 22 GND 11 100VA 23 100VA 12 HV 24 HV Table 4 5 1 Pin connections 1101 B 4 11 Troubleshootin Power Supply Specifications DC Max Output Current 33
21. circuit which translate the discrete analog single transducer codes to a serial data stream similar to the array transducer ID system is included in the bus interface block The transmitter is special designed for the required frequency range The receiver front end is a TGC regulated wide band preamplifier which provides low input noise and performs all single channel TGC control For frequencies 12MHz the receive signal from the preamplifier is transferred directly to the output stage and then further processed in the beamformer circuitry For the transducer frequencies between 15 20MHz the signal passes through a down conversion path a mixer circuit which will downconvert the preamplified signals to a frequency inside the frequency range of the A D converter in the beamformer in order to prevent signal aliasing problems The output from the Single module is fed to the step variable amplifier block on the Front end Delay board 1101 8 11 Theory of Operation Power Supply Lamp Power Panel Fuses 3 Main Filter 4 ET ES oe i 1 Ly Secondary Rectifier Primary Windings PFC Switch Control 0 Drive 4 Opto coupler E POWER SUPPLY 260342 Fig 8 3 6 Power Supply S
22. equipped with Single element module Note If a phantom is not available the human body is a good alternative Basic Checks Visual Inspection 1 Check the overall appearance of the 1101 Especially check for scratches 3 2 1101 System1101 Merlin Keyboard Before Power Up Power Up Note 1101 Checking Procedure Check that the keyboard is easy to move up and down The 1101 System complies with the IEC 60601 1 safety regulations and as such it must be connected to a mains outlet having a safety ground connection Therefore Check that the 1101 mains cable is terminated with a three pole plug that fits a three pole mains outlet For safety reasons do not use extension cables Note The 1101 operates from 90 270V using the same type fuse VF0007 T 1 6A H 250V Disconnect all accessories from the 1101 and connect any transducer available which fits the Array Input Module Switch On the1101 After a few seconds the power up boot sequence is completed Verify that the monitor opening layouts are shown in Fig 3 3 1 Note that the menu shown settings differs from transducer type 000 10 05 854 10 37 29 7 5 0 0 Fig 3 3 1 default display Check that the following is displayed on the monitor the current date and time a white Asterisk Freeze mode Transducer type If the displayed date and time is incorrect press Setup to display the S
23. galvanic separation COPY Trigger Connector DIN VASE FOOT SWITCH 29 Secondary Rectifier Primary Windings PFC Switch D Control Opto coupler AQ1674 Connector DIN Alphanumeric Keyboard Keyboard NP0159 Potmeter Module Trackball NT0256 Monitorboard ZH0707 Video IN BNC Transducer Control Temperature Control 01671 Unipolar Xmitters Receivers TGC1 Serial Peripheral Interface Dig Rotate XMIT 16 32 RAM TGC2 and Apodizing Derotate 32 16 Register Register Register Display System DIP switches Test Input 1 Antialiasing filters Pre processing The physical connection between the pcb boards are as follows Connected with a Cable Connection through the Motherboard gt Parity Code Check Converter 50 AQ1677 Signal 30 pin Transformation Single Connector Fansupply AGND 5 RS 232 For development purposes only Review Memory Graphics Overla Scanconverter System 8 11 2000 Drafter
24. memory banks as the build up of a converted image takes place in the background When the image is converted the banks are switched Data from the active bank are clocked out from the VRAMs to a Video D A converter Palette circuit Graphics from the CPU system are entered into the Video D A converter as overlay to the image data Floppy Disk The Floppy Disk Drive is not exactly a part of the Core but the controller circuit is placed here The drive is used for storing and retrieving ultrasound images and for updating the scanner software 8 10 1101 System 1101 Merlin Theory of Operation Single input module TX current TX pulse TX HV regulator Transmitter e 3 monitor generator amp Curr limiter supply X Transducer Connector gt TX Control Mix CIk Reciever ee Mixer Output buffer RX Out Transducer ig Rn Board control and SPI Code converter lator Interface Motor control Servo Amplifier FE bus interface ei SPI amp Interrupt IFC Index Encoder signal Fig 8 3 5 Single input module The Single input module is a self contained functional block with separate bus interface and board control transmitter receiver and motor control unit included The transducer code interface
25. power supply connector on the Motherboard 5 Replace the power supply and reverse the dismantling procedure Replacing the Fans Remove the handle and cover as described in section 0 Remove the keyboard as described in section 0 1 Unscrew eight screws holding the fans and disconnect the connector attached to the Motherboard see Fig 6 1 15 Fig 6 1 15 Screws holding the fans and the fan connector 1101 6 9 Mechanical Parts System 1101 Merlin Getting access to the PC boards Remove the handle and cover as described in section 0 1 Unscrew the 14 screws M3x6 holding metal cover see Fig 6 1 Fig 6 1 16 Screws holding the metal cover for the PC boards Replacing the Front end Delay board Remove the handle and cover as described in section 0 Get access to the PC boards as described in section 0 1 Unscrew the screw next to the transducer connector see Fig 6 1 17 Fig 6 1 17 Screw holding the Front End Delay board 2 Pull out the board 3 Install the new Front end board and reverse the dismantling procedures 6 10 1101 System 1101 Merlin Mechanical Parts Replacing the Core board Remove the handle and cover as described in section 0 Get access to the PC boards as described in section 0 1 Pull out the Core board approx 5 cm and disconnect the cable attached to it see Fig 6 1 18 Fig 6 1 18 Connector on Core board to be disconnected 2 Slide out the Co
26. 0 1000 ml purified Water Troubleshooting Section 4 For troubleshooting the power supply e DVM Adjustment Procedure Section 5 For adjusting the monitor e Nonmagnetic screwdriver e Ruler for checking the size of the image on the monitor Mechanical Parts Section 6 e Static Control Service Kit type 8501 WQ 0969 or similar when handling the static sensitive PCB s TORX key size 7 10 and 20 e Allen key size 2 mm e Spanner 7 mm 1 6 1101 System 1101 Merlin General Information Preventative Maintenance Section 7 Electrical Safety Test 1101 Equipment necessary to perform the Preventative Maintenance is the equipment used in the Checking Procedure and Electrical Safety Test Safety Tester HV Tester WB 1275 HV test adaptor for tyoe BF Transducers WJ 0246 HV Test Plug for Mains Electrical Safety Test Record Enclosed 1 7 General Information System 1101 Merlin This page is left blank intentionally 1 8 1101 System 1101 Merlin General Information 1101 1 9 1101 2 Electrical Safety Test Record 21 For INSTRUCTIONS read the back of this sheet Test Date Test Test Typical Test Limits Select value or Rigel self test 2 Mains Nominal Voltage 10 Pr gnd Earth terminal Transducer Pr gnd connector array Pr gnd Single module connector Pr gnd Monitor Earth Norm Leakage Earth Rev Leakage
27. 3 5 Checking Procedure 3 6 System 1101 Merlin Press Shift Alt and Probe X to access the Test Oscillator again Press F2 to start Delay test oscillator 2 The image should now look like the figure below 4 concentric bands which consist of a number of white light grey blocks separated by 32 narrow black radial lines Turn the gain down to see if all bands can be adjusted to dark grey and turn the gain up again to see if all bands appears white again 000 10 05 856 10 50 35 3 5 NOS N my Fig 3 3 6 Delay Test Oscillator 2 Press F2 to start Delay test oscillator 3 The image should now look like the figure below i e 16 radial fields separated by narrow white lines The fields should be white from top to bottom and then gradual decrease in length going from right to left Turn the gain down to see if all fields can be adjusted to dark grey and turn the gain up again to see if all fields appears white again O1 PREPILOT4 B8 000 10 05 856 10 59 17 3 5 Fig 3 3 7 Delay Test Oscillator 3 1101 System1101 Merlin 18 19 20 Monitor Checking 4 1101 Checking Procedure If the 1101 has a single input module then disconnect the transducers Start the Single Input Test Oscillator by pressing Shift Alt and Z select e g 8539 F2 and unfreeze Compare to the image below Note that it may be necessary to increase the gain to get an i
28. 6 ns Tap 0 Tap 95 Odd Even 299 t Even t t switch witch switch Switch T RMX_C 1 4 7 8 9 10 11 12 RMX I I 1 24 Odd U Even Switch switch switch switch R RMX_C 2 5 13 14 15 16 17 18 N 1 D Even Odd Even Odd Even R switch switch switch PWiteh 1 24 RMX_C 3 6 19 20 21 22 23 24 R 5 Focus Switch Matrix Fig 8 3 3 1101 focus switch matrix Fig 8 3 3 shows the 1101 focus switch matrix The matrix has 16 inputs and connects to 96 input taps of the delay chain RMX 1 3 5 6 12 Range tap 0 63 maximum 1224 ns RMX 2 4 11 16 Range tap 0 63 maximum 1224 ns The necessary delay range for the different RMX signals is lowest at the center aperture and highest at the edge of the aperture The advantages of the IAB concept Only one chain of delay components is needed As there are no zones and only one chain no circuit matching is needed The receive focus is close to ideal 8 8 1101 System 1101 Merlin Theory of Operation Core board
29. CEDURE BI 1101 B 4 9 Troubleshooting System 1101 Merlin 4 5 Power Supply Troubleshooting the Power Supply The Voltage LED s Block Diagram of the Power Supply 4 10 LowV HV The 1101 Power Supply is replaced as a complete unit WARNING Mains voltage is present in the Power Supply Fig 4 5 1 Voltage LED s Inside the Power Supply are two green Voltage LED s which are visible trough holes at the power supply cover when the top cover of the 1101 has been removed When the Power Supply is working satisfactorily i e all voltages are present the left hand Green Voltage LEDs will be lit The right hand LED which represents the High Voltage HV and 100 V is only present during scanning After freezing the image the LED will be lit for approximate half a minute Refer to Fig 4 5 1 S O Power Panel Fuses ho gt gt Prima 3 Secondary Windings PFC Switch 4 Control Drive Opto coupler POWER SUPPLY 260342 Fig 4 5 2 Power Supply 260342 1101 System 1101 Merlin Troubleshooting If one or both of the Voltage LEDs are Off it indicates that one or more voltages are Missing The reason is one of three 1 A defective transducer shorting the HV 2 A short circuit in the Console 3 A Power Supply fault
30. E1 VR103H or NTSC H PHASE 2 VR102 so that the test picture is located in the centre of the background light area Switch Off the 1101 and re assemble the Scanner Service Notes System 1101 Merlin This page is left blank intentionally 5 4 BI1101 B System 1101 Adjustment Procedure 1101 5 5 System 1101 Merlin Mechanical Parts Section 6 MECHANICAL PARTS CONTENTS PAGE 6 1 Dismantling and Reassemble 5 6 2 6 1 1 Handle iit d e ud e i d dee 6 2 6 1 2 Remove the Keyboard ci one ete entiende denen et a aha c 6 4 6 1 3 Getting access to the inside of the 6 5 6 1 4 Replacing the 6 5 6 1 5 Removing the potentiometer module 6 5 6 1 6 Replacing the single input ans ttd ete tette idit idv dile 6 6 6 1 7 Replacing the Power Supply 6 8 6 1 8 Replacing the Fans x b Ehe o e ree re tas 6 9 6 1 9 Getting access to the PC 9 6 10 6 1 10 Replacing the Front end Delay 6 10 6 1 11 Replacing the Core board uci ene cene evertere em en ee endi eedem in 6 11 6 1 12 Replacing the Board iind Lnd e dn en Le da id e ea a e od 6 11 6 1 13 Replacing the monitor and the Floppy Disk Drive
31. GC curve using the TGC Potentiometers and observe the effect on the B image Size 2 1 Verify the function of the Image Size Press Lower Image Size button to decrease the size of the objects higher scale units and the upper Image Size button to enlarge the size of the objects lower scale units Focusing Note This section is only valid for array transducers 1 Check that there is a focus zone mark arrow on the screen If not press w 2 Move the Tracker Ball up and down and check that the arrow moves accord ingly on the monitor screen Also check that max lateral horizontal resolution is at the position of the arrow use the phantom model 254 to check the focusing 3 Press again to toggle the number of zones selected 1 4 Frame Rate 1 Connect a mechanical transducer and press the Frame Rate Up Down and observe that the speed of motor change correspondingly 2 Connect a Array transducer press the Frame Rate Up Down and observe that increased frame rate narrows the scanning field 3 8 1101 System1101 Merlin Image Processing Puncture Zoom Measure 1101 Be do Checking Procedure Press LZ Use phantom model 254 to check the following Press Contrast F1 F2 and observe the effect on the image Press Contour F3 and observe the effect on the image Press Grey Scale F4 and step trough the five different gray scales by pressing F4 successive Observe the effect on the image
32. Service Manual Diagnostic Ultrasound System 1101 Valid for systems from serial no 1824869 May 2002 NS e B K M e d World Headquarters Mileparken 34 DK 2730 Herlev Denmark oe 2 Tel 45 4452 8100 Fax 45 4452 8199 www bkmed com e mail rt bkmed A Subsidiary of Analogic Corporation os wv B K M di MA Headquarters Mileparken 34 DK 2730 Herlev Denmark 45 4452 8100 Fax 45 4452 8199 www bkmed il rt bkmed A Subsidiary of Analogic Corporation m ee m ee m ee ee ee System 1101 Merlin General Information Section 1 GENERAL INFORMATION CONTENTS PAGE INNEN uec AM REAS 1 2 1 1 1 Terms and Symbols Usal steed go duet p e o Mete Mee E PUE M eO e a due ede 1 2 1 4 2 WARNINGS and 6 2 1 000 000000000 1 3 1 2 System Overview E 1 4 1 2 1 ndi M EE 1 4 1 2 2 Rear eode P de ed eiie us 1 4 1 2 3 System Config ration eid tne dede Pad dead bte ded 1 5 1 2 4 Modules and PC Boards dinone i dea eiie edd cede ee dae dei edite dd ted 1 5 1 3 Revision System 1 5 1 4 Special Tools and
33. T icum Ae Dei MD M 9 2 9 2 aicut M 9 2 9 3 Cable Connections internal 9 2 9 3 1 Identification Table zu oce te PEDRO MERI 9 2 9 3 2 System Interconnection 9 3 9 4 Video specifications 2222402 9 4 9 5 Dip SWITCH 9 5 9 6 Multi pin Connections external 9 6 1101 9 1 System Interconnections System 1101 Merlin Introduction By showing the PC Board locations cables between PCB s and external cable connections this section aims to help you keep track of important signals internally in the 1101 and to other equipment Further is described switch jumper settings for quick reference PCB Locations Power supply 260342 Monitor ZV0056 Single element transducer module 2 0020 Keyboard 7 0014 Front end Delay Board ZE0732 Core Board 200761 Fig 0 1 PCB Location Cable Connections internal The 1101 Interconnection diagram figure 9 3 1 shows the cable connections between parts in the Merlin To simplify the diagram all the cables are shown as single lines regardless of type and number of leads Identification Table Cable no Type No of leads Connecting AQ1675 Ribbon 28 Single Module C
34. VD 5 VD 2A 5 VA 2 5A 12 VA 3A 12 VA 2A 100 VA 25mA 100 25 HV 75 mA HV 75 mA Ripple REGU PROTECTION LATION Active 0 5 Vpp 5 Table 4 5 2 Table of voltage tolerances with load 4 6 Monitor The 1101 is equipped with a 10 B W Monitor Monitor Disassembling To get access to the PCB remove the 1101 cover Missing picture on monitor What to do e Check the power to the monitor e Check that the CRT High Voltage is present The CRT High Voltage build up can typically be heard during power on e Check cables connectors e Try to connect an external monitor System 1101 Merlin e If the picture is not present on the external monitor the problem is most likely located on the Core board Motherboard or board 4 12 1101 B System 1101 Merlin Troubleshooting 4 7 Software update 1101 B The software for the 1101 can be updated via the build in floppy disk drive 1 Insert the floppy disk labeled Load 000 in the floppy drive 2 the 1101 3 When the line 2100 LOADER appears after approximately 3 seconds then press Shift 4 Arepeating beeping then indicates that the software load menu has been accessed Type 2100 LOADER VP2767 CB2100 10 26 2001 08 48 14 Select command using lt key gt lt 1 gt Upgrade scanner software using floppy disk lt 2 gt Upgrade scanner software using se
35. and slide the keyboard assembly a few centimetres forward 5 Disconnect the keyboard connector see Fig 6 1 6 Fig 6 1 6 Screws holding the keyboard and the keyboard connector 6 4 1101 System 1101 Merlin Mechanical Parts Getting access to the inside of the keyboard Remove the handle and cover as described in section 0 and remove the keyboard as described in section 0 1 Unscrew the two M3x6 screws holding the keyboard see Fig 6 1 7 2 Use screwdriver to pull up the keyboard which are fixed with four snap locks Fig 6 1 7 Screws holding the keyboard Replacing the trackball Remove the keyboard and get access to the keyboard interior as described in section 0 1 Disconnect the cable from the Potentiometer board see Fig 6 1 8 2 Unscrew the four nuts M3 and remove the trackball see Fig 6 1 8 Removing the potentiometer module Remove the keyboard and get access to the keyboard interior as described in section 0 1 Disconnect the three cables from the Potentiometer board see Fig 6 1 8 2 Unscrew the six screws M3x6 and remove the board see Fig 6 1 8 Note Under one of the screws is a washer see below Washer underneath this screw Fig 6 1 8 Items attached to the back of the keyboard 1101 6 5 Mechanical Parts System 1101 Merlin Replacing the single input board Remove the handle and cover as described in section 0 1 Unscrew the 15 screws M3x6 h
36. as been set to refer to section 9 Dip switch setting 2 To get access to the potentiometers inside the monitor remove the handle and cover as described in section 6 175 130 Fig 5 2 1 Geometric Test Picture 3 Switch On the 1101 and press the Shift Alt and Probe X Then press F5 to chose the Test picture Pressing F5 toggles between Geometric test picture all pixel off and all pixels on 5 2 1101 System 1101 Adjustment Procedure L102A H size PAL 102 H size 2 VR302 V size 2 NTSC H Phase PAL VR102 Phase gt NTSC Z m V Pos VR304 V Pos 2 NTSC Fig 5 2 2 Adjustment potentiometers coils on the Deflection Board The following adjustments step 3 11 are done on the Deflection PCB refer to Fig 5 2 2 Allow the monitor to warm up for at least 15 minutes before you proceed with step 3 3 1101 Adjust the height on PAL V SIZE1 VR301 or NTSC V SIZE2 VR302 so that the height of the test picture is 130 mm V Position Turn up the brightness until the background light is visible Then adjust PAL V POSI1 VR305 or NTSC V POSI2 VR304 so that the test picture is located in the centre of the background light area Width Adjust the width on PAL H SIZE1 L102A or NTSC H SIZE2 L102 so that the width of the test picture is 175 mm H Position Adjust the position on PAL H PHAS
37. cer and control chip FPGA controls transmit and receive timing data acquisition clocks and TGC Parameter memory address generation 1101 8 9 Theory of Operation System 1101 Merlin Scanconverter The SCNV part consists of the following modules converter for converting the beamformed signal to SCANDAT e Scan Line Pre processing system which performs line averaging assembling of composite focus lines and Edge Enhancement Contour Image Averaging System which performs linear averaging of B images and handles image review for all 2D images and time review for M mode e Convert system for interpolation of scan lines to images and control of the display memory e Video DAC and rear panel connectors for video audio The purpose of the Scanconverter and Display Subsystem is to convert the 2 D data from the Delay Board to video signals for use in the Monitor The data enters the Averaging system where the average of 1 to 14 images are generated The averaged data is then stored in the Image Review memory image by image The scan lines from either the Averaging system in record mode or the Review Buffer in review mode are fed through a Grey Curve Mapping RAM and into the Scan Buffer The Converter Control is the device which generates the distance calculation between data samples in the scanlines and the pixel to be written to the Display Memory The converted data is stored in the Display Memory There are two
38. ct the scanner to another mains outlet preferably in another room A change in the noise pattern indicates noise on the mains e Check that the wall outlet has a proper grounding Compare different transducer types and frequencies MFI External noise is often frequency specific The noise can also be caused by a failure in the digital noise reduction system on the Delay board Use the test oscillators to confirm this Shift Alt and Probe X Note Before contacting the support group in Denmark for help with noise problems it is recommended that you try out the suggestions above If installed use the image storage facility of the 1101 to save a couple of images showing the problems The images can easily be attached to a e mail No Echo Information Possible cause Look for Actions to locate failure Defective transducer Try another transducer Defective Front End Delay board recognize circuit Transducer type no on the monitor Try another transducer and or try the delay single module test which simulates the transducer codes Defective keyboard 69 Does symbol disappear when unfreezing Try on the scanner keyboard and on the transducer as well Missing HV on Power Supply Green HV LED inside power supply Check the Power Supply sec 4 5 Failure on Front end Delay board receive part Check input test osc sec 0 Failure on Front end Delay board Delay pa
39. d volume press Volume if using the draw function 3 9 Checking Procedure Image review M mode Split Screen Image Storage 3 10 Note System 1101 Merlin Make a scan and press 09 Observe that a horizontal Track movement scrolls through the most recently recorded B mode images This section is only valid Array transducers Press the M on the keyboard Start the transducer and check that the echoes now are displayed both as a normal image and as horizontal lines that reflect the echo information along the M mode line Press OD to activate Split Screen Press to make a scan Press OD and repeat for B Insert a formatted floppy disk in the floppy drive Freeze the image on the screen Press Store to store the current monitor display on a floppy disk and enter Yes F1 When asked Patient ID OK Press and press F5 to see the list of images on the floppy disk and press to retrieve the image 1101 System1101 Merlin Checking Procedure 1101 3 11 System 1101 Merlin Troubleshooting Section 4 TROUBLESHOOTING CONTENTS PAGE 4 1 seat 4 2 4 2 Replaceable PariS 4 2 4 3 Keys to Troubleshoot Specific Problems 4 3 4 3 1 Boot M 4 3 4 3 2 LOSS of
40. dules in 1101 can be replaced without further actions made Any work that requires opening the 1101 must however be followed by an electrical safety test Before replacing a subassembly it is necessary to verify that the ID revision of the new part is the same or higher than the ID of the defective part Item to be replaced Necessary action after replacement 2 0056 Monitor Monitor Adjustment Section 5 00041 Lithium battery Set real time clock User settings 1101 B System 1101 Merlin Troubleshooting 4 3 Keys to Troubleshoot Specific Problems Hints Boot Problem Possible cause Look for Actions to locate failure Defective Power Supply Green LED inside power supply Check the Power Supply sec 4 5 Dip Switch 8 set to Only the first line in the boot sequence is Check dip switch 8 sec 9 5 Debug terminal displayed Defective Core board After switching task in the boot sequence Check error log sec 4 8 the scanner stops breaks down Defective Core board The count up in the boot sequence is never Try to reload the software completed to switching task Defective Keyboard The message Keyboard error is Check the keyboard connection if displayed during boot up OK try another keyboard Note a keyboard from a 2101 2102 can also be used for this test The boot sequence should under normal circumstances look like below The first line Type 2100 LOADER
41. e 1101 7 5 101 Merlin Theory of Operation System 1 Section 8 THEORY OF OPERATION CONTENTS PAGE 8 1 Introduction 8 2 8 2 icr IEDRITIUgegppe E 8 2 8 2 1 Configurations eae 8 2 8 2 2 Block Diagram 2 3 bte 8 3 8 3 irte eedem eerie 8 5 8 3 1 Front End Delay Board n eee ene 8 5 8 3 1 1 The Incremental Analog Beamformer 8 7 8 3 2 8 9 8 3 24 CPU System ig inde tetas pena 8 9 8 3 2 2 Real time Scancontroller 8 9 9 3 2 3 Scariconverter 8 10 8 372 4 Disk anc eet dti 8 10 8 3 3 Single MPU MOINE di ditio 8 11 8 3 4 Power Supply o 8 12 8 3 5 MONRO 8 13 8 36 1101 Test facilitas i c ee DO PD RE ED UD HUP HEURE URS 8 14 1101 8 1 Theory of Operation System 1101 Merlin Introduction This section describes the theory of operation of the Diagnostic Ultrasound System 1101 This description is divided into two separate sub sections 8 2 G
42. e three screws underneath the monitor see Fig 6 1 22 S 22 p 0 gt Fig 6 1 22 Screws holding the Floppy Disk Drive 6 14 1101 System 1101 Merlin Exploded Views 6 1 6 15 1101 Mechanical Parts 1101 part list Item no 101 102 103 104 105 106 107 108 110 111 112 113 114 115 116 117 119 120 121 122 123 124 125 125 126 127 128 129 130 131 132 133 134 6 16 Part no DZ 2324 AQ 1677 ZH 0689 ZV 0056 DZ 2322 AQ 1674 ZH 0690 ZN 0020 ZG 0342 YT 1430 ZN 0021 YT 1408 ZN 0023 AQ 1673 UL 0018 ZE 0732 ZD 0761 AQ 1671 QB 0041 AO 0427 NT 0256 DP 0876 NT 0159 ZN 0014 DP 0888 AO 2016 ZH 0688 GU 1776 YT 1306 ZN 0022 DZ 2321 DL 2124 YC 0002 YT 6308 YT 3306 YM 0335 YT 1306 YM 0486 YT 1336 YM 1300 YT 2306 YT 1312 Quantity 32 ANN APY DH cl 12 44 18 10 15 System 1101 Merlin Description Front cover Flat Cable for Single Module Motherboard Monitor Assembly Cover Flat Cable for I O board Board Single Element Transducer Module Power Supply Screw for Handle 4 30 Handle Screw M4x8 Fan Flat Cable for Floppy Disk Drive Floppy Disk Drive Front end Delay board Core Board Video Cable Battery part of Core Board Keyboard Cable Tracker ball Gain button Keyboard Overlay Keyboard Comple
43. efer to Fig 8 2 2 1101 Block Diagram The signal path starts at the Front End Delay Board where the transmit beam signal profile is generated The beam profile is fed to a 32 channel transmit driver and then directed to the active transducer connection The echo signals are routed from the active transducer connection to the preamp TGC1 on the Front End delay board The signals are derotated and at the same time added together two by two according to their delay requirements to reduce the number of signal lines The echo signals are filtered and delayed with different delays to convert the arc shape of the echo signals to a straight line The signals are then added together to form a single signal representing the reflection from the scanned object On the Core Board the analog signal is converted to an 8 bit digital signal On the Core Board the digital signal is processed and converted into a composite video signal for use in the Monitor Besides the scanning image the graphics are mixed into the video signal The Core Board controls the signal flow through the system and the whole timing in respect to the active transducer It also handles input output to Keyboard Foot Switch Copy Trigger and Floppy Disk drive 1101 8 3 8 wesbelg 101171509 614 g L0OLLIG Power Panel Fuses 96 pin Connector Main Filter 2 1
44. eneral Description Supported by a complete block diagram this section aims to give you an understanding of the interaction between modules PC Boards and major function blocks It explains briefly the main signal flow through the 1101 system 8 3 PC Board Description This section provides an overall description of each PC Board explaining the main function of all function blocks on the board Furthermore the section contains a description of Single Transducer module and the Monitor General Description The following aims to give you a brief and easily read description of how the different modules and parts of the Diagnostic Ultrasound System 1101 are related to each other and how they function together as a system The complete block diagram shown on page 8 5 should be used for reference while reading this section Configurations The Diagnostic Ultrasound System 1101 is configured for use in B and M Mode The 1101 is equipped with the following boards subassemblies Front End Delay board FE DLAY Core board Mother board Back plane board Power Supply Monitor Keyboard subassembly Potentiometer and Gain Board part of keyboard Track Ball part of keyboard As options the 1101 system can be equipped with a Single Element Transducer Module and a floppy drive 8 2 1101 System 1101 Merlin Theory of Operation Block Diagram The description of the PC Boards follows the signal flow in the 1101 system R
45. er The resolution and gain settings of this amplifier is designed to compensate for level difference between Odd Even apertures The step variable amplifier is controlled in parallel with the settings of the delay system in accordance with a set of gain values which are located in the focus table along with the delay information The settings of gain produce switching noise which is added to the beam signal The sum of the beam signal and all the switching noise is passed through the band pass filtering and on to the Noise Reduction System The Noise Reduction System is a digital system based on the fact that the switching noise is the same for each focus table Each time a new focus table is to be used the system requires that an empty receive period is performed as switch noise reference empty means without any transmission taking place During this reference receive period a digital representation of the switch signal is saved in a memory device During the following receive periods the beam signal contains the sum of the echo signal and the switch signal This sum signal is digitized and the memorized part of the beam signal representing the switch signal noise alone is digitally subtracted from the sum The noise reduced digital beam signal is then digitally detected and the signal is processed Finally the signal amplitude is digitally converted into logarithmic form The mapping from linear to logarithmic form is based o
46. etup menu where the date and time adjustment is found 3 3 Checking Procedure System 1101 Merlin Test Oscillators Connect a transducer to the 1101 Switch On the scanner Press Shift Alt and Probe X to select the Test menu Select the Scancon Test oscillator by pressing F3 and unfreeze Press Shift Alt and Probe X to access the Test Oscillator again oa gt Toggle between Scancon test 1 2 and 3 by pressing F3 and compare to the images below Note that the actual image on the scanner depends on various settings e g size 10 39 36 7 5 0 0 Q 554 10 45 30 7 5 S 0 0 Fig 3 3 3 Scancon Test Oscillator 3 T Exit the Scancon Test by keeping F3 depressed for 1 second 3 4 1101 System1101 Merlin Checking Procedure 8 Select the Input Test Oscillator by pressing F1 Compare to the image below Fig 3 3 4 Input Test Oscillator 9 Exit the Input Test Oscillator by pressing F1 10 Switch off the scanner and disconnect all transducers from the 1101 11 Turn on the scanner and after the boot sequence press Shift Alt and Probe X 12 Select the Delay Test oscillator by pressing F2 and unfreeze The image should now look like the figure below i e concentric bands which gradually goes from black to white light grey and then back to black Note The actual number of concentric bands depends on the size selected Fig 3 3 5 Delay Test Oscillator 1 1101
47. heck with the user that the system is operating satisfactorily A number of malfunctions can be corrected by changing set up s If an error is obvious correct it at this state 2 Modifications In accordance with the Service Informations HOT LINE perform modifications necessary to ensure performance and stability of the unit 3 Mobility Check that the keyboard can be moved up down and locks in the upper position Check that the trackball moves smoothly 4 Fans inside the 1101 Observe that the two fans in the front of the 1101 runs 5 Checking Procedure To verify proper operation of the main functions perform the CHECKING PROCEDURE Section 3 6 Peripherals This is to verify the function of the video output and the peripherals used with the 1101 System Following peripherals used with the 1101 are supported by B K Medical EQ 4056 VCR Super VHS AG MD380 EQ 4071 Video Printer Sony UP 895CE Take a picture print and check the quality If necessary adjust the peripheral using the instruction manual for the product 7 Adjustment Procedure If necessary perform an adjustment of the Monitor using the ADJUSTMENT PROCEDURE Section 5 8 Electrical Safety Test Verify that the system complies with IEC 60601 1 using the Electrical Safety Test Section 1 1101 7 3 Preventative Maintenance System 1101 Merlin This page is left blank intentionally 7 4 1101 System 1101 Merlin Preventative Maintenanc
48. ip probe to the metal ring on the single module connector Press the TEST button and record the resistance 4 Move the clip probe to on of the metal on the back of the monitor Press the TEST button and record the resistance Leakage Current General remarks and settings for test no 6 and 7 Test 6 measures Earth Leakage current normal condition Test 7 measures Earth Leakage current single Fault Condition supply open Tester Rigel 233 Cables Mains cable for scanner Basic settings 1101 mains switch ON Rigel switch settings Class 1 Connect the mains cable for the scanner to the IUT POWER outlet Rigel to power inlet on the scanner 2 Position the Rigel Normal Reverse switch in Normal and record the current 3 Position the Rigel Normal Reverse switch in Reverse and record the current 4 Repeat the above test for test no 7 High Voltage Test General remarks and settings for A Tester HV Insulation Tester JP15 Cables HV probe and GND lead JP15 accessories Adaptors HV test plug for mains WJ0246 Connections Insert the HV test plug for mains into socket for mains input socket Connect the JP15 GND with the scanners GND using the JP15 GND lead Basic settings Mains switch on scanner ON on JP15 Connect HV probe cable with switch plug into socket HT sw Select 1pA and 7 5 kV Volume to mid position and HV potentiometer fully anti clockwise Test A Insert tip of HV probe into the HV
49. lay Test 1 must pass BI 1101 B 4 7 Troubleshooting System 1101 Merlin Fig 4 4 6 Delay Test Oscillator 3 DELAY TEST is a verification that all 16 inputs the beamformer works including aperture opening and dynamic focusing The 16 radial fields separated by narrow white lines The fields should be white from top to bottom and then gradual decrease in length going from right to left Pre requisite Input Test Oscillator Delay Test 1 and Delay Test 2 must pass The Input Test Oscillator An array transducer must be connected and active to start this oscillator Press F1 to select the Input Test Oscillator 11 07 16 Fig 4 4 7 Input Test Oscillator 4 8 BI 1101 B System 1101 Merlin Troubleshooting The Singlelnput Test Oscillator Optional Disconnect the transducer before activating the Single Input Test oscillator by pressing Shift Alt Z Then select the single element simulator that you want to activate e g 8539 used with 1850 F2 and press 69 SINGLE OSC 12 43 5 10 Fig 4 4 8 Single Input Test Oscillator Monitor Tests The monitor tests are used during checking and adjustment of the 1101 monitor To start the Test osc Press Shift Alt and Probe X Press F5 to toggle between the three test pictures 1 Geometric Test picture for testing linearity phase and size 2 All pixels off 3 All pixels on See Section 5 MONITOR ADJUSTMENT PRO
50. leshooting System 1101 Merlin 4 1 Introduction This section is divided into separate sub sections some of which cover specific areas within the troubleshooting others describe the overall test facilities in the 1101 But before you jump to any of the subsections you should first consult Section 4 3 which might give you if not the solution then some ideas of how to troubleshoot this particular problem of yours To prevent injury to persons and damage to the 1101 be aware of the following WARNINGs e Opening the Cabinet can expose live parts Any work done on the open instrument with power On must only be done by Medical or their authorized representatives who are aware of the hazards involved repair work done on the 1101 system must be followed by an electrical safety test to verify a continuous safe operation of the system e The Core board contains a lithium battery The battery must only be replaced by a person having special knowledge as described in sec 4 2 Replaceable Parts CAUTIONs e Switch Off the 1101 before connecting or disconnecting the 1101 to any peripheral units Failure to do so could damage the equipment The PC Boards in the 1101 are sensitive for static discharge Therefore when handling PC Boards always take steps to prevent static discharge see Section 1 5 Special Tools and Equipment 4 2 Replaceable Parts 4 2 Apart from a few exceptions listed below all PC Boards and mo
51. mage like the one below 4 88 000 10 0 d d 10 53 30 10 0 Fig 3 3 8 Single Input Test Oscillator Exit the Single Input oscillator by pressing Shift Alt and Z Press Shift Alt and G to get a greyscale on the monitor screen The scanner must be in freeze mode Verify that the external controls for Brightness and Contrast on the monitor provides sufficient adjustment range and set to give the best image Press the Shift Alt and Probe X Then press F5 to chose the Test picture Pressing F5 toggles between Geometric test picture all pixel off all pixels on 175 mm 130 mm Fig 3 3 9 The Geometric Test Picture Check the geometry of the test Picture If you have problems meeting the above requirements consult Section 5 ADJUSTMENT PROCEDURE Checking Procedure System 1101 Merlin Transducer Inputs If available connect a Single element transducer to the Single element socket and verify correct operation of the transducer Track Ball The track ball should move smoothly 1 Start the scan mode and press 9 2 Press ABC and check that a white square appears on the monitor screen Move your finger on the Tracker ball and verify that the square can be set off for a linear movement in any direction within the B image field 3 Press ABC until the square disappears Gain TGC 1 Press to start scanning 2 Adjust the gain using the gain potentiometer and observe the effects on the B image 3 Adjust the T
52. n values stored in a writeable memory device The digital output of the lin log conversion is fed to a 10 bit D A converter and thereby converted back to analog form From here the analog signal passes through the low pass anti aliasing filters and on to the final 8 bit A D conversion The output of this converter is the digital input to the scanconverter on the Core board The selection of LP filter and the rate of the final A D conversion is set by the RTSC on the Core board and is thus independent of the beamformer function 8 6 1101 System 1101 Merlin Theory of Operation The Incremental Analog Beamformer IAB The IAB represents a new concept in Dynamic Receive Focus for scanning with Array transducers The Incremental Analog Beamformer uses only one simple chain of delay components and a signal switching matrix for connecting the transducer signal to the delay line During the programming of the signal connections only one signal line is changed at a time The method of changing just one signal connection at a time is referred to as an incremental change of delay setting rather than a zone based system with many changes in each programming cycle Delay Line with tap drivers Delay Line with tap drivers 0 15 16 31 Even switch Odd switch 8 x 16 Crosspoint switch 8x 16 Crosspoint switch 2 X C 2 5 13 14 15 16 17 18 MS RMX C 1 4 7 8 9 10 11 12 Fig 8 3 2 IAB Simplified
53. olding the metal shield box and remove the metal plate see Fig 6 1 9 Fig 6 1 9 Screw holding the metal shield box covering the Single module 2 Disconnect the connector to the Mother board and the connector to the transducer connector see Fig 6 1 10 3 Unscrew the four screws holding the board and remove the clip holding the power regulator see Fig 6 1 10 gt Fig 6 1 10 Connectors and screws the single module 6 6 1101 System 1101 Merlin Mechanical Parts 4 Unscrew the three nuts holding the Single Module box an remove the box see Fig 6 1 11 Fig 6 1 11 Nuts holding the Single Module box 5 Replace the single module board and reverse the dismantling procedures 1101 6 7 Mechanical Parts System 1101 Merlin Replacing the Power Supply Remove the handle and cover as described in section 0 1 Unscrew the two nuts M4 holding the power supply see Fig 6 1 12 Fig 6 1 12 Nuts holding the Power Supply 2 Unscrew the two screws on the bracket holding the Power Supply and remove the bracket see Fig 6 1 13 3 Disconnect the mains connectors to the Power Supply see Fig 6 1 13 Fig 6 1 13 Bracket holding the Power Supply and connectors to it 6 8 1101 System 1101 Merlin Mechanical Parts 4 Carefully lift up the Power Supply disconnecting the connector attached to the Motherboard see Fig 6 1 14 Fig 6 1 14 Disconnecting the
54. onnector Board AQ1674 Flexible 26 board Mother Board AQ1671 Coax 4 Core board Mother Board 2016 Single 6 Trackball Potentiometer Gain Board AQ1673 Flexible 26 Floppy Mother Board AO0427 Single 8 Keyboard Mother Board AQ1677 Ribbon 50 Single Module Mother Board 9 2 1101 System 1101 Merlin System Interconnections System Interconnection Diagram Keyboard 2 0014 0159 200342 i Part of PSU 7 y 2 0056 i of monitor Monitor NT0256 200671 02016 i A00427 Track Pot Gain 20688 8 AQ1671 N gt ZH0690 S AQ1674 8 5 Board x 9 gt 2 0732 m AQ1673 010018 Part of fans 1AQ1677 Single input Connector Fang board Board 2 X ZNO023 i Single module 2 0020 Fig 0 1 System Interconnection Diagram 1101 9 3 System Interconnections Video specifications Scanning frequency System 1101 Merlin Horizontal 15 625 Hz CCIR and 15 750 Hz EIA Vertical 48 62 Hz interlaced Video frequency response gt 10 MHz 3 dB Video input format Horizontal frequency
55. re board 3 Install the new Core board and reverse the dismantling procedures 4 Set the clock on the system to the right time and date Refer to the user guide Note The user set up will also be set to factory default setting Replacing the I O board Remove the handle and cover as described in section 0 1 Unscrew the nuts 72 on the three connectors and disconnect the cable going to the Motherboard see Fig 6 1 19 Fig 6 1 19 Nuts to be removed and connector to Motherboard 1101 6 11 Mechanical Parts System 1101 Merlin 2 Install the new I O board and reverse the dismantling procedures 6 12 1101 System 1101 Merlin Mechanical Parts Replacing the monitor and the Floppy Disk Drive Remove the handle and cover as described in section 0 Remove the keyboard as described in section 0 Remove the Power Supply as described in section 0 Remove the Single Input Module if Mounted as described in section 0 1 Disconnect the video the Single module if installed and the Floppy disk connector from the Motherboard see Fig 6 1 20 Fig 6 1 20 Video Single Module and Floppy disk connector on the Motherboard 2 Unscrew the four nuts M4 holding the monitor frame and lift up the monitor assembly see Fig 6 1 21 Fig 6 1 21 Nuts holding the monitor assembly 1101 Mechanical Parts System 1101 Merlin 3 Remove the floppy disk drive from the Monitor assembly by unscrewing th
56. resentatives who are aware of the hazards involved Anyrepair on the 1101 must be followed by an electrical safety test to verify continuous safe operation of the system e Only the original mains cable must be used NEVER USE EXTENSION CABLES e The 1101 contains a Lithium battery Under no circumstances must this battery be removed or replaced by the user as there is danger of explosion Personal Safety Be aware that there may be a risk of infection due to contaminated equipment especially puncture guides needles and transducers The following precautions should be taken At the hospital ask the staff to sterilise transducers and puncture guides before receipt Consoles must be disinfected as recommended in the User Guide before any repair When working with possible infected equipment use gloves especially if you have open wounds or scratches Possible infected equipment must be sterilised before handed over to customers Follow the recommendations in the Transducer User Guide e Always wash your hands after working with the equipment e f you scratch yourself on contaminated equipment you should immediately contact the hospital staff or see a doctor Cautions e Always use correct fuses Switch off all equipment before connecting or disconnecting their interfaces Failure to do so could damage the equipment e The power supply cord is the means of separating the 1101 from the main power supply 1101
57. rial port lt 9 gt Reset all user programmed parameters NVSS lt q gt Quit no upgrade performed 5 Press the 1 for Upgrade scanner software using floppy disk and follow the instructions on the screen Note Do not turn off the 1101 during the updates this may cause the Flash Proms on the Core board to fail 6 the completion of the software loading the 1101 will restart After this reload press Shift Alt ID to check that the software version is correct By resetting the NVSS by pressing 9 in the above menu the applications transducer setup label library bodymark library are set to factory default If a default language different from English has been set by loading the Language disk then the names of the applications label library and bodymark library will be set to that language Note Not all names may have been translated Note Support of Language disk is only for units with boot PROM VP2767 and sw version 1 20 or above 4 13 Troubleshooting System 1101 Merlin 4 8 Error Log on Core Board In case the scanner stops operating during normal use the CPU Core Board in some cases stores information in a error log This log can be accessed PC anda terminal program e g Windows Hyper Terminal Note The Error Log is stored until you delete it which means that you can also see old failures if present 1 2 8 Connect the PC to the scanner via the RS232 with the cable EL4021 or
58. rt Check delay test osc sec 0 Defective Core board Scan Converter part Check scancon test osc sec 0 Defective Core board HV setup to Power Supply Green HV LED inside power supply Check the Power Supply sec 4 5 Defective Core board RTSC part Try with another Core board 1101 B System 1101 Merlin 4 4 The Test Oscillators The 1101 is equipped with a number of Test Oscillators for troubleshooting purposes 1101 B The Test Oscillator menu are activated by pressing Shift Alt and Probe X The Single Transducer test oscillator are activated by pressing Shift Alt Z FE DLAY e Y Noise 96 Delay t conn ier chain 1 Lin Log Troubleshootin A H Test Plug Scan Plug A Analog Test Osc 1 Digital Test Data 5 SW Gen Test Data 2 v Power Indicator LEDs Keyboar Optional Single Transduce Module ZH0696 Optional PSU amp Cooling 1101 Test Block Fig 4 4 1 Oscillator Signal Flow The Delay test 2 and 3 uses the Input test oscillator thus the Input test osc must work in order to start the Delay test osc The Delay and Single module test both simulates transducer codes which can be used to isolate failures with recognizing a transducer 4 5 Troubleshooting System
59. sary Equipment The equipment necessary for a preventative visit is divided into 3 packages A Parts necessary to ensure the performance and stability of the system Check in the Service Informations Hot Line if there are any modifications to be done B Parts necessary to meet customers complaints Before arranging the visit check if the customer has any complaints and bring the necessary spare parts and tools to solve the problem C Tools and equipment necessary to perform the Preventative Maintenance The only equipment necessary to perform the Preventative Maintenance is the equipment used in the Electrical Safety Test and phantoms for the Checking Procedure For the Checking Procedure Transducer Phantom model 254 B K no WQ 0973 for checking a 1101 scanner equipped with Array and Single Element Transducers Transducer Phantom type 251 WQ0972 for checking 1101 scanner equipped with the Endosonic Probe 1850 For the Electrical Safety Test Testers required Safety Tester HV Tester WJ 0246 HV Test Plug for Mains WB 1275 HV Test Adapter for Transducers for array transducers It is recommended to bring additionally the Static Control Service Kit type 3M 8501 B K no WQ0969 or similar in case one of the static sensitive PC Boards is to be removed from its location in the 1101 1101 System 1101 Merlin Preventative Maintenance 7 3 What to do 1 Users Comments and Corrections C
60. similar Use PC terminal program e g Procomm or Windows Terminal Com settings 19200 BPS 8 1 Set DIP switch 8 down scanner bottom 7 Down Switch on the scanner On the PC press lt N gt at the prompt DO YOU WANT TO MODIFY JOB PRESS YES TO CONFIRM On the PC press lt N gt at the prompt DO YOU WANT TO RESET TO DEFAULT SET UP Y N If any text in the error log you will be prompted DO YOU WANT TO SEE THE POST MORTEM HISTORY 7 Note This will only appear if the error log is not empty Then press Remember to re set DIP switch 8 Up after turning the scanner Off If the contents of the error log does not make sense please then send a copy to the Service department at B K Medical 4 14 1101 B System 1101 Merlin Troubleshooting 1101 B 4 15 System 1101 Adjustment Procedure Section 5 ADJUSTMENT PROCEDURE CONTENTS PAGE 5 1 Introd ction io un LL Doe ei i ii tiie 5 2 5 2 Monitor Adjustment 0 eterno 5 2 1101 5 1 Service Notes System 1101 Merlin Introduction Most of the adjustable components in the 1101 are factory adjusted and need no further adjustment Do not attempt to make other adjustments than stated in this section Monitor Adjustment Necessary tools e Along flexible non magnetic and non conductive screwdriver 1 Check which Video standard the scanner h
61. te incl of item 122 130 Potentiometer buttons Trackball cable Potentiometer board Cable relief bracket Screw Hinge covers Keyboard lock Spring Pin for keyboard lock Screw 23 6 Screw M3x6 Nut M3 for trackball Screw M3x6 Nut M4 Monitor single module and PS M3x36 for Fans 72 Nut for board connectors M3x6 for Single Module M3x12 for Single Module 1101 System 1101 Merlin Mechanical Parts This page is left blank intentionally 1101 6 17 System 1101 Merlin Preventative Maintenance Section 7 PREVENTATIVE MAINTENANCE CONTENTS PAGE 7 1 E 7 2 7 2 Necessary Equipment 7 2 7 3 What to 7 3 1101 7 1 Preventative Maintenance System 1101 Merlin 7 1 7 2 Note 7 2 Introduction The purpose of the Preventative Maintenance is to ensure the performance and stability over the years of use Note The Preventative Maintenance should be performed once every year Preparation of the Preventative Maintenance is essential as it in most cases will take place at the hospital as part of a Continuity Agreement The Preventative Maintenance consists of eight steps Some of these steps refer to specific sections in the Service Manual If errors occur during the procedure go to TROUBLESHOOTING Section 4 Neces
62. test plug for mains Press button on HV probe handle while increasing the HV to 2 2 kV DC read from the voltmeter Apply this voltage for maximum 5 sec There must be no flash over nor breakdowns indicated by full deflection on the 2 of 2 1101 2 Electrical Safety Test Record 3 of 3 System 1101 Service Notes Note Edition Number BI 1101 B Service Notes Section 2 SERVICE NOTES To improve the performance of the Merlin scanner 1101 small changes in the hardware and firmware may be made All information about these changes and any other change or correction to this Service Manual will be released in the form of Service Informations in the Medical Hotline All existing and future Service Notes concerning the 1101 Merlin scanner should be placed in this section If any major changes are made to the 1101 Merlin scanner and or the Service Manual a new edition will be released Any new editions can be recognized by the edition number given in the footer The serial numbers from which each edition is valid are listed on the front page 2 1 Service Notes System 1101 Merlin This page is left blank intentionally 2 2 1101 System 1101 Service Notes 1101 B 2 3 System1101 Merlin Section 3 CHECKING PROCEDURE Checking Procedure CONTENTS PAGE 1211
63. to one echo pulse received from the focal point 1101 8 5 Theory of Operation System 1101 Merlin The Front end Delay board also holds a test oscillator used for fault finding The signal lines from the receiver are lead into a bank of switches in a 32 16 configuration which derotates the 32 symmetrical received channels into 16 independent channels for TGC and beamforming The switches consist of nine 8 16 cross point switches with configuration data in a local RAM accessible from the Core board CPU After the derotation of the signals they are amplified in 16 TCG amplifiers including current to voltage conversion and circuitry for receive apodising A principle called Incremental Analog Beamformer IAB see detailed description below is used for beamforming of the received echo signals The IAB consist of one single chain of delay lines This delay chain performs the dynamic receive focus by delaying the signals from the transducer element pairs into a time correlated beam signal This is obtained by moving the input position of each signal to the delay chain as the delay requirement is changing as a function of time The system can be considered as a zone switching system with 8000 different zones in which the width in tissue of each zone is less than 0 2 mm At the same time a step variable amplifier provides the final setting of the beam signal amplitude in steps of 0 5 dB from 11 5 to 20dB before entering the bandpass filt
64. ystem 1101 Merlin The Switch mode Power Supply consist of a switch mode Power Supply which delivers 3 3V 5 V 5V A 5V D 12 12 100V and one programmable HV supply 44 100V controlled by the Core Board using 4 digital signals The programmable output is used to drive the crystal elements of the transducers The DC outputs are protected against overload by current limiters The Power Supply can deliver a total DC output power of 160VA and is designed to run on a single mains phase of 115 volt or 230 volt AC The Power Supply accepts voltages in the range 90 270V The actual mains voltage fuses needs not to be set 8 12 1101 System 1101 Merlin Theory of Operation Monitor The 10 B W monitor for the 1101 is a self contained unit with standard video input signal It operates at 12 V DC supplied directly by the power supply The horizontal scanning frequency is changed between 15 625 Hz CCIR and 15 750 Hz EIA automatically i e without adjustment of the unit The vertical scanning frequency is 48 62 Hz interlaced The monitors has external brightness and contrast controls 1101 8 13 Theory of Operation 1101 Test facilities System 1101 Merlin The 1101 tests are all visual tests creating an image on the monitor refer to sec 3 for details FE DLAY 96 Delay conn ie chain AD P Noise gt Lin Log

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