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Troubleshooting
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Summary of Contents for ConMed 7550
- Page 1 Service Manual...
- Page 2 CONMED’s option) the same without charge, provided that routine maintenance as specified in this manual has been performed using replacement parts approved by CONMED. This warranty is void if the product is used in a manner or for purposes other than intended. © 2006 CONMED Corporation 525 French Road Utica, New York 13502 U.S.A.
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Page 3: Table Of Contents
Table of Contents & List of Illustrations Section Title Page General Information ...Refer to Operator’s Manual (P/N 60-7551) System Components ........Refer to Operator’s Manual Operation ............ Refer to Operator’s Manual Operator Service ......... Refer to Operator’s Manual Technical Information ......... Refer to Operator’s Manual Circuit Descriptions ................ - Page 4 Section Title Page Single-Ended Amplifier [A9] ................6-16 RF Output Assembly/Components [A10] ............6-17 6.10 Low Voltage Power Supply [A6] ............... 6-18 6.11 HS/A.R.M. Assembly [A11] ................6-18 6.11.1 Handsense Circuit ......................6-18 6.11.2 Aspen Return Monitor (A.R.M.) ..................6-19 6.11.3 RF Leakage Monitor .......................
- Page 5 Section Title Page 8.7.3 Pinpoint Coag Calibration (Power Control Assembly - A4) ..........8-3 8.7.4 Spray Coag Calibration (Power Control Assembly - A4) ........... 8-3 8.7.5 Bipolar Calibration (Power Control Assembly - A4) ............8-4 8.7.6 ABC Calibration (Power Control Assembly - A4) ............. 8-4 8.7.7 ABC Over Voltage Calibration (Power Control Assembly - A4) [Optional] .....
- Page 6 Figure/Title Page Figure 6.1 RF Drive Signals ....................... 6-8 Figure 6.2 Line Sync/RAM ...................... 6-11 Figure 6.3 Flow Diagram ......................6-14 Figure 6.4 Resistance vs. Bargraph ................... 6-19 Figure 7.1 Test Adapters ......................7-9 Figure 7.2 Test Analyzer Connections ..................7-10 Figure 3.1 RAMP Flat Spot .......................
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Page 7: Circuit Descriptions
Circuit Descriptions Section 6.0 Introduction nators are listed together it means the logic func- tions are the same and can be interchanged. The information on the System 7500™ circuits 6.2.2 Mailbox [U19] identifies specific signals and I/O ports that help identify the appropriate signal levels. -
Page 8: Activation Requests [U16 & U33]
subtracts it to the existing power value. A_T: Active Mode or Target Mode The control microcontroller reads and controls ABC™ mode and used for tone selection only. power change requests, however the monitor A_T SET, tone is 500 Hz and ABC™ is active microcontroller also looks at the encoders to verify - A_T CLEARED, tone is 250 Hz and the change is valid. -
Page 9: Display Drivers - Seven Segment [U14, U20, U39, U40, U41, & U17]
“ON” position. To verify the selection, turn the on bits 4-7 drive the “tens” digit; and the hex power off for at least 10 seconds, and then restore value on the address (A0, A1) is used to drive power. the “hundreds” digit. The displays are common anode, therefore each segment is illuminated with 1-TEST-RUN (Default: RUN MODE) an active low on the drivers. -
Page 10: A/D Inputs [Monitor Microcontroller]
when they occur. An error for 2V is a return the ABC™ output. In Spray, the voltage is electrode fault and occurs when the resistance constant for all dial settings. measured on the return electrode is not within FB_MON: Full Bridge Monitoring specified limits for either a single or dual foil Cut, Blend, Pinpoint and Bipolar modes only. -
Page 11: Keyboard Scanner [U5]
= 9V when HVDC is 200V (0V-9V) Handcontrol 1 - Cut or PPT. Coag = 8.8V at full dial cut (0V - 8.8V) Handcontrol 1 - Spray Coag = 3.8V at full dial cut (0V - 3.8V) Handcontrol 2 - Cut or PPT. Coag = 6.2V at 10 SLPM (.15v to 6.2V) Handcontrol 2 - Spray Coag 6.2.14 Keyboard Scanner [U5]... -
Page 12: Power Control - Full Bridge Amplifier
6.3.1 Power Control - Full Bridge Amplifier two is called P (Power Error), a signal that can increase or decrease the HVDC for power Output power in the Full Bridge modes is con- control. When the signal is positive, the HVDC trolled by monitoring the output voltage and is reduced and when negative, the HVDC is current, multiplying the two together and the... -
Page 13: Rf Logic [U7 On The Power Control Assembly]
RA7. The signal labeled P (power control) is FB_EN (Full Bridge Enable - input from control driven from the DAC on the Display PCB and is microcontroller) the control voltage for output power. The range CLEARED when Cut, Blend, Pinpoint or for P is 0V-9V . -
Page 14: Power Control - I/O Signals
SP_P : (Scaler to calibrate Spray power) of about 200nS. FB2 RST follows FB2 DRV and has a pulse duration of about 200nS. SET for Spray activation to rescale SE_Pcon for Spray calibration and control. SE_DRV: (Single Ended Drive) T_RLY: RF drive for the single ended amplifier. -
Page 15: High Voltage Power Supply [A7]
with a light load. The degree of dampening is and the pulse width controller is U5 and Q2. For used to determine if a load is present or not. the start of each cycle of ABC™, Q2 is turned off and this allows C10 to charge linearly. -
Page 16: Hvps Isolation Components
(AC Lo), and J1-4 (AC Com). We should note nated, the voltage on HVDC is dumped through that these AC signals are isolated from AC Mains this fuse. If the fuse opens up, then the only by means of an isolation transformer located in means of discharging the HVDC is through the the generator assembly. -
Page 17: Hvps Low Voltage Components
6.4.4 HVPS Low Voltage Components in a specific DC voltage at light loads (R >1K ohms), and then the DC voltage will be reduced The NPN transistor, Q6, provides the supply for heavier loads (R <1K ohms) for power regu- voltage for the low voltage components on this lation. -
Page 18: Hv Regulation Control Loop
from 10V to -1.4V , and when the output of the is driven by a DAC that is located on the differential amplifier is negative (-4V), the RAMP Display Panel and has a range of 0V to 9V . In charges from -1.4V to 10V . -
Page 19: Argon Flow Control [A1]
To enable the correct triac, the signals HVT_EN front panel, and is user controlled by the ABC™ (Pinpoint, Spray & ABC) or LVT_EN (Cut, power setting in the Automatic mode, or by the Blend, & Bipolar) must be high. These signals user specified flow rates in the Manual and Endo originate on the Display Board Assembly. -
Page 20: Mass Flow Rate Regulation
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Page 21: Smart Sense
tions. This component has an output proportion- greater than 4 lpm; and for all dial settings al to the differential pressure across the calibrated that meet this criteria, the flow rate may restriction and the output is referred to as dP be reduced down to 4 slpm. -
Page 22: Single-Ended Amplifier [A9]
Refer to the schematic (Figure C-14). Each drive When the power devices switch on, viewed as cycle starts with 01 and the pulse width of this a closed switch, the current flows from +HV , signal is approximately 1µS. The signal is ampli- through the output transformer primary (+tank fied from 5V to 12V at U1, turning on the driver to -tank) and is passed to -HV . -
Page 23: Rf Output Assembly/Components [A10]
RF Output Assembly/Components If alternate current paths exist, some of the cur- rent exiting through the balun is returned to the [A10] amplifier via an alternate path. In this condition, The RF Output of the System 7500™ is essen- the fields of the balun are not equal, presenting tially the secondary of three different output trans- some degree of inductive impedance to the output formers, with only one of them actually located on... -
Page 24: Low Voltage Power Supply [A6]
located on the Display Assembly, and one should proportioning valve voltage changes with the first verify that each relay according to the table flow setting (V=IR). The collector of the driver above is receiving a drive signal. Also, spend time for the digital valve will switch from 15V to near to test all modes and all outputs as the “process of ground when the valve is energized, as the valve... -
Page 25: Aspen Return Monitor (A.r.m.)
a drive time that occurs on the diode of U6. A mizing the RF voltage appearing across T4 wind- logic device on the Display Assembly drives this ings. T4 also acts to step-up the return imped- diode with a square wave, and when this diode is ance by about 10:1. -
Page 26: 6.11.3 Rf Leakage Monitor
value can be locked into memory and the Return 6.11.5 Arc Sense Transformer Fault condition will be cleared. The Arc Sense Transformer, connected with the 6.11.3 RF Leakage Monitor -TANK terminal in ABC™ mode, sends a propor- tional sample of tank ring-down voltage to the The System 7500™... -
Page 27: Maintenance/Checkout
Assembly When the button is pressed, the argon gas The System 7550 consists of a Generator assembly tube can easily be pulled out of the mating (Head Assembly) and a Mobile Storage assembly connector. -
Page 28: Access To Circuits & Factory Settings
Default Settings (Factory Settings) WARNING: DO NOT PLACE UNIT IN SERVICE WITH ABC TEST MODE ON. Each time the System 7550™ is powered on, it • The ABC Test Mode can be enabled anytime will initialize to the default modes. Four (4) of when the Power is on. -
Page 29: Initial Setup & Test
1. Connect the power cord to a grounded AC Figure 7.1 is a listing of test leads that are needed outlet and press the main switch/breaker to to test the System 7550™. To test the output turn the system on. power during the functional testing, the test leads are necessary. - Page 30 3. Verify the system defaults to the following ABC Power Range (W) Flow Range (SLPM) modes: 10-19 • Pure Cut (Display above Blend knob dis- 20-24 plays “0”). 25-29 • Pinpoint Indicator is illuminated.* 30-34 • Endo indicator is illuminated. 35-39 •...
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Page 31: Activation Testing
7.7.3 Activation Testing • Activate ABC footswitch and verify an audible tone occurs and the blue indicator Caution: Handcontrol accessory electrodes can in the ABC section illuminates. cause RF burns if touched during activation, • Activate bipolar footswitch and verify an even if the handcontrol accessory is not the audible tone occurs and the blue indicator one that is activated. -
Page 32: Argon Flow Testing
5. Bipolar Coagulation - (Load - 100 ohms) 2. With an Argon Calibrated Flow Meter: • Set the power to 20W - Activate Bipolar • Insure the nozzle of the ABC accessory is and verify the power is 20W (15W - seated within the intake hose of the meter 25W). -
Page 33: Return Monitor (A.r.m. - Aspen Return Monitor)
The return monitor allows a Single Foil Dispersive • Resistance = 160 ohms: Ten (10) Electrode or Dual Foil Dispersive Electrode to be bargraph segments flashing; Monitor Set connected to the System 7550. indicator flashing; Return Fault indicator 1. Select Single Pad flashing. -
Page 34: Pulsed Cut Mode
7.11 Mobile Storage Pedestal (Cart) tone consists of two different frequencies, with The System 7550 Mobile Storage Pedestal (Cart) the higher frequency being the tone that identi- houses the High Pressure pneumatics, pressure fies when RF is delivered and the lower frequency relief valve, tank pressure switch, tank pressure tone identifying when the RF is off. - Page 35 �������� ������� ��������� ������� ������������� ������� ������������� � ���� ��������� ������������ ������� Figure 7.1 Test Adapters...
- Page 36 Figure 7.2 Test Analyzer Connections 7-10...
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Page 37: Calibration
• Dispersive Electrode Adaptor: Made from a dispersive electrode cord that can be used A.R.M. Calibration (HS/A.R.M. on the System 7550™, with a banana jack in Assembly - A11) place of the dispersive electrode. 8.4.1 10 Ohm A.R.M. -
Page 38: 150 Ohm A.r.m. Calibration
Trigger the oscilloscope for the bottom of the • Connect a DVM to TP3 (dP) and TP2 (Gnd). RAMP signal at the “flat spot” of the RAMP . • With the System 7550™ in idle mode, adjust (See Figure 8.1) RA2 (dP ADJ) for 0V . -
Page 39: Fmon Calibration
FMON Calibration a reading of approximately 100mA on the • Connect a standard ABC accessory to the ammeter. System 7550™. • Adjust L1 on the RF Output Assembly (A10) • Select Manual Flow Mode at 4 slpm. for a minimum current. -
Page 40: Bipolar Calibration (Power Control Assembly - A4)
8.7.5 Bipolar Calibration (Power Control • Activate ABC and increase the power control Assembly - A4) and verify the signal disappears when the out- put is 3500Vpk ±200Vpk. • Connect a 100 - 125 ohm load (ESU analyzer) • Remove the jumper. between the two (2) Bipolar RF Output Jacks. -
Page 41: Iec Rf Leakage Measurement [Optional]
International Electrotechnical Commission (IEC) 150mA when tested using the IEC setup. Most has adopted a repeatable test method to evaluate of the modes available within the System 7550™ high frequency leakage currents (alternate path are well under this limit, however Spray and ABC leakage currents) in electrosurgical generators in are typically at 130mA to 145mA. - Page 42 the cables can be suspended to meet similar dis- • ABC™ (30W): The ABC™ mode has a fixed tances as shown in the figure. The table or bench output voltage that is not dial dependent that the load and active accessories are placed on when a load is not connected directly between cannot be made of, or have, a conductive surface).
- Page 43 Mnemonic List Appendix A Note: On the schematic, a suffix _C indicates the signal is to the Controller Micro Signal On the schematic, a suffix _M indicates the signal is to the Monitor Micro Signal MNEMONIC DESCRIPTION High Voltage [HVDC, plus terminal] Phase 1 [RF Drive for FB amp] Not Phase 1 [RF Drive reset pulse - 200nS wide] Phase 2 [RF Drive for FB amp]...
- Page 44 GAS_EN Gas Enable [opens the solenoid valve[ H1CG _C ... _M Handcontrol 1, Coag Activation Request H1CGSW Handcontrol 1, Coag Switch jack H1CT_C ..._M Handcontrol 1, Coag Activation Request H1CTSW Handcontrol 1, Cut Switch jack H1RF Handcontrol 1 RF [active output jack] H2CG _C ...
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Page 45: Introduction
MODE when placed back in service or a Fatal and not the cause. When requesting assistance Error will occur (Err 20). from CONMED Technical Services, be specific on which error codes, if any, are displayed. WARNING: When the TEST MODE is... -
Page 46: Control Microcontroller Failure Codes And Troubleshooting Tips
Control Microcontroller Failure Codes and Troubleshooting Tips Err Reason Probable Problems Suggested Solutions Stuck Front Panel Switch User pressing switch during power up. Disconnect J1 on the Display Panel and power up again. If Err 1 is displayed, Front Panel overlay failed. then U5 on (A5) may be defective. -
Page 47: Monitoring Microcontroller Failure Codes And Troubleshooting Tips
Err Reason Probable Problems Suggested Solutions Bad EPROM CRC EPROM failed (U1) (A5). Reset System - replace U1 if problem reoccurs. CPU RAM Failed Micro Internal RAM failed (U15)(A5). Reset System - Replace U15 if problem reoccurs. CPU Failed Microprocessor Failed (U15)(A5). Reset System - Replace U15 if problem reoccurs. - Page 48 Reason Probable Problems Suggested Solutions Output Power Power Control Circuit Failed (A4). Recalibrate (See Power Calibration sec- tion). D/A Failed, P (A5). range 0-9V (A4, A5). Activation Error Monitor Activation Request Error - Swap U16 & U33: A different error code U32 (A5) failed.
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Page 49: Additional Troubleshooting Tips (Non-Error Code Related
Reason Probable Problems Suggested Solutions FB Amp Drive Error • U7 (A4) Failed. • COND0..D7: CT-39H, Pinpoint - 6Fh. • U14A on (A4) Failed. • FBMON (A4): Ct: 2.85V , Pinpoint .35V . • U21 - Port A (ConD0..D7) on (A4 &... - Page 50 Problem Probable Cause Suggested Solutions Breaker trips when the system is Shorted power FET on amp Identify the amp with the problem [FB: activated. CUT, PINPOINT or SE: SPRAY, ABC]. Use a DVM to measure continuity of each FET. Keyboard switches not work- Front Panel Overlay bad.
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Page 51: Error Storage And Retrieval
No RF Output. No RF Drive on the Power FETs. If true for both amps, then: -HVDC < 12V -Check for 15V on T1 & T2 of the amplifiers. -PP relay (not the problem if bipolar or ABC have no RF output). If only one amp, then: -Spray relays if only Spray (K2, K4) -FILR relay if Cut, Blend, Pinpoint and... -
Page 52: Example Error
• Convert 132 decimal to binary 10000100. From the Active status list we can see that the LOW GAS SUPPLY LED was on and ABC was activated at the time of the “Err”. • The table below is an illustration of this example. SYSTEM 7550 CONTROL TRANSLATION... - Page 54 B-10...
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Варианты подключаемых РУЧЕК (инструмент) - для КОАГУЛЯЦИИ и для РЕЗАНИЯ. Один инструмет - рабочий дистальный конец инструмета в защите из керамики (игла в трубке) , второй вариант - дистальная рабочая игла ОТКРЫТА ! ....без защитного "колпачка" !?