Fukuda Denshi CARDIMAX FX-7202 User manual

F
FX X- -7 72 20 02 2
●
Service Manual
●
・Before setting up/maintenance, please read this service manual carefully.
・Keep this manual where it can be always referred to.

Copyright © 2003 by Fukuda Denshi Co., Ltd.
No part of this document may be copied or transmitted in any form without the prior written
permission of Fukuda Denshi Co., Ltd.
Printed in Japan

i
Notice
This manual contains technical information on the FX-7202 aimed at Fukuda
Denshi service representatives and professional engineers.
Before performing maintenance the unit, read the manual carefully and use it
to help you work correctly and safely.
When you have finished using the manual, store it carefully in a designated
location.
Strictly follow the instructions of this manual whenever you perform
maintenance or make adjustments to the unit. Failure to do so may lead to a
serious accident.
●Safety
This manual utilizes the graphic symbols shown below. Make sure that you
understand the meaning represented by these symbols, carefully read the
instructions given in the text, and work safely.
DANGER
Failure to follow this message may result in death or serious injury to the
patient or operator, damage to the equipment, or create a fire hazard.
WARNING
Failure to follow this message may result in death or serious injury to the
patient or operator.
CAUTION
Failure to follow this message may cause injury to the patient, or may
cause damage to the equipment.
Symbol Description
NOTE
A note is not related to product safety. A note provides
information about the proper use and operating method
to prevent incorrect operation and trouble with the
unit.
Indicates an action that must not be performed.
Indicates an action that must be performed.
REFERENCE
Indicates the reference page for the operation method.

ii
●Servicing Precautions
In servicing the FX-7202, observe the following.
DANGER
Never remodel the medical electronic equipment.
If remodelled, the equipment may not ensure safe operation,
thereby causing accidental hazards to the patient and
operator.
CAUTION
yThe service manual is intended for the service engineers
of Fukuda representatives and the technical staff
concerned with medical electronic equipment. Servicing,
reassembling, and adjustment shall be performed by
autorized service engineers.
yPrepare proper facilities and tools when servicing.
yBe sure to follow the instructions of operation manual
when operating the instrument. For operating precautions,
refer to the operation manual.

iii
CAUTION
Disassembling/Reassembling Precautions
yBe sure to turn the power off and disconnect the power supply cord
from the wall outlet. Then start disassembling the instrument.
yWhen removing the main PC board, remove the battery in advance.
yTake care not to disconnect and connect the key panel and sensor
board from/to the connector too frequently. Too frequent disconnection
and connection of these units may cause poor contact.
yUse proper screwdrivers to loosen screws.
yWhen reassembling, make sure all screws are tightened to original
positions and all disconnected connectors are reconnected properly.
PC Board Handling Precautions
yPC boards are equipped with extremely sensitive devices to static
electricity.
yPC boards are sensitive electronic assemblies. Take proper measures
for removed PC boards, e.g. put them in a conductive bag.
yHandle PC boards carefully. Giving an impact to them may damage
devices mounted onto them.
yNever remove a PC board or connect the connector to it when it is
supplied with power.
CAUTION
If you find a value which exceeds the allowable level, be sure to let the
user avoid using the instrument. If the user operates the instrument as it
is, he/she may receive an hazardous accident.
●Equipment Classification
The FX-7202 is classified into the following equipment:
1. Protection against electrical shock
Class 1, Internally powered
2. Type against electrical shock
Applied part: Type CF
3. Degree of protection against harmful water invasion
Ordinary equipment
4. Degree of safety in using under air-inflammable anesthetic gases or
oxygen/nitrous
oxide-anesthetic gases
Equipment used under an environment containing no inflammable
anesthetic gases or no inflammable cleaning agent.
5. Running mode
Continuous running mode

iv
Overview of the Manual
This manual consists of the following 8 chapters.
Contents of each chapter are briefly explained below.
Chapter 1 Component Names and Functions
The locations and functions of the unit's operation panel, switches, connectors,
and other components. A list of specifications is also given.
Chapter 2 Maintenance
Cleaning, test menu, program version updating, periodical inspection items,
and methods.
Chapter 3 Disassembly
How to disassemble the unit in order to replace defective parts.
Chapter 4 Electric Circuit Diagrams
Electric circuit diagrams and diagrams of the connections between printed
circuit boards.
Chapter 5 Spare Parts List
A list of components supplied as spare parts.
Chapter 6 Board Component Diagrams
The layout of the connectors and other mounted parts for each of the unit's
printed circuit boards.
Chapter 7 Assembly Diagrams
The illustrations of the parts in three dimensional exploded views.
A list of the parts is also given.
Chapter 8 Technical Instructions Related to EMC
Technical instructions required by IEC60601-1-2 Ed.2 are described in this
chapter.

v
Contents
Notice ···································································································································· ⅰ
Safety··························································································································· ⅰ
Servicing Precautions ·································································································· ⅱ
Equipment Classification······························································································ ⅲ
Overview of the Manual···································································································· ⅳ
Chapter 1 Component Names and Functions ······························································· 1－1
Unit （top face）················································································································· 1－1
Unit （side, rear, and bottom faces）··············································································· 1－2
Operation panel ················································································································ 1－3
Specifications list·············································································································1－5
Chapter 2 Maintenance ···································································································· 2－1
Cleaning ···························································································································· 2－1
Cleaning the unit ····································································································· 2－1
Replacing the battery ······································································································· 2－2
Installing the optional software······················································································· 2－4
Self-diagnostics test ········································································································ 2－5
User self-diagnostics test ························································································ 2－6
TEST PATTERN································································································ 2－7
RECORDING TEST ·························································································· 2－8
KEY TEST ········································································································· 2－10
LCD TEST ········································································································· 2－10
BUZZER TEST ·································································································· 2－11
Manufacturer self-diagnostics test··········································································· 2－12
STATUS TEST ·································································································· 2－14
LAN TEST ········································································································· 2－15
MEMORY TEST ································································································ 2－16
RECORDER TEST···························································································· 2－17
TOUCH PANEL TEST······················································································· 2－19
INTERNAL MEMORY INITIALIZE ····································································· 2－20
FX7202 UPDATE ··············································································································· 2－21
Periodical inspections ····································································································· 2－22
Periodical inspection intervals and precautions······················································· 2－22
List of periodical inspection items············································································ 2－22
Safety inspections (6 items) ···················································································· 2－23
Before checking the leakage current ································································· 2－23
Checking the earth leakage current
(current that flows to protective earth resistance) ·············································· 2－25
Checking the enclosure leakage current
(current that flows from the enclosure to
the earth terminal of the power outlet) ······························································· 2－26
Checking the patient leakage current I ······························································ 2－27
Checking the patient leakage current III ···························································· 2－28
Checking the patient measurement current ······················································· 2－29
Checking the protective earth resistance··························································· 2－30
Inspection of electrical performance/characteristics················································ 2－31
Hardware inspections (10 items)············································································· 2－33
Periodical inspection record ··························································································· 2－35

vi
Chapter 3 Disassembly ···································································································· 3－1
Removing the enclosure cover························································································3－1
Removing the main board ································································································3－2
Removing the recorder unit ·····························································································3－3
Removing the ECG AMP unit ···························································································3－4
Chapter 4 Electric Circuit Diagrams ··············································································· 4－1
Overall block diagram of unit···························································································4－1
MAIN BOARD block diagram···················································································4－2
MAIN CPU section ·····························································································4－3
MAIN G/A section·······························································································4－3
Memory section··································································································4－4
AMP, LAN interface section ···············································································4－6
LCD controller section ························································································4－7
Thermal head control section ·············································································4－7
Motor controller section ······················································································4－8
Real time clock···································································································4－8
Wait control section····························································································4－9
Reset circuit section ···························································································4－9
Sensor control section························································································4－10
OPERATION interface and power interface section···········································4－11
Power generator section ····················································································4－12
Clock generator section ·····················································································4－12
ECG AMP BOARD block diagram ···········································································4－13
OPERATION BOARD block diagram·······································································4－15
POWER BOARD block diagram ··············································································4－16
FX-7202/FCP-7201 Block Diagram ···················································································4－17
MAIN BOARD Circuit Diagrams (PCB-6868B) ································································4－18
Power DC/DC converter block ·················································································4－18
CLK block ················································································································4－19
MAIN CPU block······································································································4－20
MAIN GA block ········································································································4－21
FROM block·············································································································4－22
SDRAM block ··········································································································4－23
RTC/MAIN WAIT block ····························································································4－24
POWER I/F block·····································································································4－25
AMP THERMAL block······························································································4－26
SENSER/BUZZER/MOTOR DRV JTAG I/F block ···················································4－27
LAN PORT/AMP I/F block························································································4－28
KEY/LCD I/F block···································································································4－29
LCD control block ····································································································4－30
POWER LED block··································································································4－31
ECG AMP BOARD Circuit Diagrams (PCB-6867A) ·························································4－32
AMP block················································································································4－32
LAN PORT block ·····································································································4－33
Bypass condenser block ··························································································4－34
OPERATION BOARD Circuit Diagrams (PCB-6866C) ····················································4－35
Touch panel/LCD/KEY I/F························································································4－35
Back light block········································································································4－36
MAIN POWER SUPPLY·····································································································4－37
CHARGE ····························································································································4－38
LOGIC 1······························································································································4－39
LOGIC 2······························································································································4－40
MAGAZIN SW BOARD ······································································································4－41
MARK SENSER BOARD ···································································································4－42

vii
Chapter 5 Spare Parts List ······························································································ 5－1
MAIN BOARD (PCB-6868B) ····························································································· 5－1
ECG AMP BOARD(PCB-6867A)······················································································· 5－5
OPERATION BOARD (PCB-6866C) ················································································· 5－7
POWER1 BOARD (PCB-6863B) ······················································································· 5－9
POWER2 BOARD (PCB-6864B) ······················································································· 5－13
MARK SENSER BOARD (PCB6865)················································································ 5－14
MAGAZIN BOARD (PCB-6862) ························································································ 5－14
Chapter 6 Board Component Diagram··········································································· 6－1
MAIN BOARD (PCB-6868B component side) ································································· 6－1
MAIN BOARD (PCB-6868B soldering side) ···································································· 6－2
ECG AMP BOARD (PCB-6867A component side) ························································· 6－3
ECG AMP BOARD (PCB-6867A soldering side)····························································· 6－4
OPERATION BOARD (PCB-6866C component side)····················································· 6－5
OPERATION BOARD (PCB-6866C soldering side) ························································ 6－6
POWER1 BOARD (PCB-6863B component side)··························································· 6－7
POWER1 BOARD (PCB-6863B soldering side)······························································ 6－8
POWER2 BOARD (PCB-6864B component side)··························································· 6－9
POWER2 BOARD (PCB-6864B soldering side)······························································ 6－10
MARK SENSER BOARD (PCB-6865 component side) ·················································· 6－11
MAGAZIN BOARD (PCB-6862 component side) ···························································· 6－12
Chapter 7 Assembly Diagrams ······················································································· 7－1
Recorder 1/4······················································································································ 7－1
Recorder 2/4······················································································································ 7－2
Recorder 3/4······················································································································ 7－3
Recorder 4/4······················································································································ 7－4
External view of recorder································································································· 7－5
LCD module ······················································································································7－6
Upper case ························································································································ 7－7
ECG Amp··························································································································· 7－8
Main Board························································································································ 7－9
Power supply unit ············································································································ 7－10
Lower case························································································································ 7－11
General assembly diagram······························································································ 7－12
Chapter 8 Technical Instructions Related to EMC ························································ 8－1
Emission information CISPR11······················································································· 8－2
Immunity information (to other than radiation/conduction) ········································· 8－3
Immunity information (to radiation/conduction)···························································· 8－4
Recommended distance of separation from
portable telephone, etc. ··································································································· 8－5

viii

Chapter
1
Component Names and Functions
Unit （top face）................................................................................ 1-1
Unit （side, rear, and bottom faces）............................................... 1-2
Operation panel ................................................................................... 1-3
Specifications list................................................................................ 1-5

Chapter 1 Component Names and Functions
1 - 1
Unit （top face）
(1) Touch-panel display
Displays ECG waveforms, patient information, and equipment status.
Used also to enter patient data or perform various operations by touching
the touch-panel keys (soft keys) provided on the screen.
(2) Operation panel
Provides the controls for the Cardimax FX-7202 operation.
(3) Magazine open button
Push to open the magazine cover.
(4) Paper magazine
Load the recording paper here.
(5) Thermal print head
Records (prints) the ECG waveforms and characters, such as the measured
values.
(1) Touch-panel display
(2) Operation panel
(5) Thermal print head
(4) Paper magazine
(3) Magazine open
button

Chapter 1
1 - 2
Unit (side, rear, and bottom faces)
NI-MH BATTERY PACK
CARTRIDGE
(6) LAN port (10 BASE T)
Connect the LAN cable here for connection to a personal computer.
(7) Potential equalization terminal
Connect the potential equalization cable (CE-12) to this terminal.
(8) AC inlet
Plug in the matching end of the power supply cord here.
(9) PATIENT connector
Plug in the patient cable here.
(10) PROGRAM CARTRIDGE compartment
Install the optional program cartridge (PC-7403) in this compartment.
(11) BATTERY PACK compartment
Install the optional battery pack (T8HRAAU-4713) in this compartment.
(7) Potential equalization
terminal
(8) AC inlet
(6) LAN port (10 BASE T)
(9) PATIENT connector
(11) BATTERY PACK compartment
(10) CARTRIDGE
compartment

Component Names and Functions
1 - 3
Operation panel
The functions of the operation panel keys and lamps are outlined below.
(1) POWER ON/OFF (stby)] key
Press this key to switch the FX-7202 to power ON from standby status.
Press this key for 2 seconds or more to switch the FX-7202 from power ON
to standby status. Also, press this key for 5 seconds or more to turn OFF the
FX-7202 in case there is system trouble.
When you operate the FX-7202 on the rechargeable battery, use this key to
turn the power ON and OFF. If the power supply cord is connected to a
wall outlet and the rechargeable battery is installed, the FX-7202 will start
charging the battery as soon as the unit is placed in the standby status
(power is OFF).
(2) Charge lamp
The charge lamp lights in blue when the rechargeable battery is being
charged. The charge lamp turns amber if any trouble such as abnormal
battery temperature, battery voltage, or charge current occurs during
charging. If the Charge lamp turns amber when you try recharging, contact
your local Fukuda Denshi sales and service representative.
(3) LEAD [ ] and [ ] keys
Press these keys to change the leads to be monitored.
(4) [START/STOP] key
Press this key to start and stop the various recording (sampling) tasks.(7)
Main Power lamp.
This lamp lights during the standby and power ON status.
(5) [REVIEW] key
Press this key to perform Review Recording. Review Recording starts
printing waveforms from those sampled 10 seconds prior to pressing
[REVIEW].
(4) START/
STOP
(7) RESET
(3) LEAD switching
(1) Power ON/OFF
(6) 1mV (5) REVIEW
(2) Charge lamp

Chapter 1
1 - 4
(6) [1mV] key
Press this key to display and record the calibrated 1mV waveform.
(7) [RESET] key
Press and hold down this key to reset the ECG waveform. The ECG
waveform input starts when you release this key.

Component Names and Functions
1 - 5
Specifications list
Lead Standard 12 leads
Sensitivity 1/4, 1/2, 1, 2cm/mV, or automatic
Polarization voltage ±550mV or greater
Frequency response 0.05 to 150Hz
Time constant 3.2 sec
Common mode rejection 2mmp-p or lower (103dB or more)
Input impedance 50M ohms or greater
Input circuit current 5×10-8 A or lower
Internal noise 20μVp-p or lower
Calibrated voltage 1mV±2% or lower
Sampling rate 8000/Sec/CH
Filter
HUM filter: -20dB or less at 50/60Hz
Muscle filter: -3dB (-6dB/oct) at 25/35Hz
Drift filter: -3dB or less at 0.25/0.5Hz
Recording system Thermal array head
Recording speed 10, 12.5, 25, 50mm/sec.
Recording resolution Deflection axis: 8 dots/mm
Time axis: 500μsec.
Recording channels 3CH, 3CH+rhythm lead, 6CH
Recording paper Z-fold paper: OP-222TE (110mm x 20M)
Display Type: Liquid crystal display (LCD) with backlighting
Resolution: 320 dot (horizontal) x 240 dot (vertical)
Electro-
cardiography
Patient data ID number, age, sex, height, weight, etc.
Basic measurement value Heart rate, R-R time, P-R time, QRS time, QT time,
QTc, electrical axis, SV1, RV5(6)
Heart Rate measurement 20 to 300 BPM
Measurement
Operation
Accuracy ±2 BPM
Interpretation and code Approx. 110 types
Minnesota code Approx. 130 types
Analysis operation
(When the
PC-7403 program
cartridge is
installed)
Grade judgment 4 types
Safety standard IEC60601-1 (Class I, type CF; Internally powered
equipment, type CF)
Power supply
AC power supply: 100 to 240V AC (±10%), 50/60Hz,
Power consumption: 80VA
DC power supply: Ni-MH battery (T8HRAAU-4713),
Power consumption: 45W
Dimensions 260mm (W) x 200mm (D) x 64mm (H)
(10.24” x 7.87” x 2.52”)
General
Weight Approx. 2.5kg (5.5 lbs.)
Temperature +10 to +40 degrees Celsius (50 to 104 degrees
Fahrenheit)
Operating
environment Humidity 25 to 95% (no condensation)
Atmospheric pressure 70 to 106kPa (700 to 1060mbar)

Chapter 1
1 - 6

Chapter
2
Maintenance
Cleaning............................................................................................... 2-1
Cleaning the unit ..................................................................... 2-1
Replacing the battery.......................................................................... 2-2
Installing the optional software.......................................................... 2-4
Self-diagnostics test ........................................................................... 2-5
User self-diagnostics test ........................................................ 2-6
TEST PATTERN ................................................................. 2-7
RECORDING TEST............................................................ 2-8
KEY TEST......................................................................... 2-10
LCD TEST ........................................................................ 2-10
BUZZER TEST ................................................................. 2-11
Manufacturer self-diagnostics test......................................... 2-12
STATUS TEST .................................................................. 2-14
LAN TEST......................................................................... 2-15
MEMORY TEST................................................................ 2-16
RECORDER TEST ........................................................... 2-17
TOUCH PANEL TEST....................................................... 2-19
INTERNAL MEMORY INITIALIZE..................................... 2-20
FX7202 UPDATE ................................................................................ 2-21
Periodical inspections ...................................................................... 2-22
Periodical inspection intervals and precautions .................... 2-22
List of periodical inspection items ......................................... 2-22
Safety inspections (6 items) .................................................. 2-23
Before checking the leakage current ................................ 2-23
Checking the earth leakage current
(current that flows to protective earth resistance) ............. 2-25
Checking the enclosure leakage current
(current that flows from the enclosure to
the earth terminal of the power outlet)............................. 2-26
Checking the patient leakage current I.............................. 2-27
Checking the patient leakage current III............................ 2-28

Checking the patient measurement current ......................2-29
Checking the protective earth resistance ..........................2-30
Inspection of electrical performance/characteristics..............2-31
Hardware inspections (10 items)...........................................2-33
Periodical inspection record ............................................................2-35