Siemens MAMMOMAT Balance User manual

MAMMOMAT Balance
SP
Troubleshooting Guide
Service Instructions (incl)
Print No.: SPB7
-
115.840.01.0
2
.02
Replaces
: SPB7
-
115.840.01.01.02
X
© Siemens AG 2004
The repro
duction, transmission or
use of this document or its contents
is not permitted without express
written authority. Offenders will be
liable for damages. All rights,
including rights created by patent
grant or registration of a utility model
or_design,_are_reserved.
English
Doc. Gen. Date: 10.04

Revision
MAMMOMAT Balance SPB7-115.840.01 Page2of 62 Siemens AG
Troubleshooting Guide Rev.0210.04 Medical Solutions
Chapter Page Revision
all all 02
Document revision level
The document corresponds to the version/revision level effective at the time of system delivery. Revi-
sions to hardcopy documentation are not automatically distributed.
Please contact your local Siemens office to order current revision levels.
Disclaimer
The installation and service of equipment described herein is to be performed by qualified personnel
who are employed by Siemens or one of its affiliates or who are otherwise authorized by Siemens or
one of its affiliates to provide such services.
Assemblers and other persons who are not employed by or otherwise directly affiliated with or autho-
rized by Siemens or one of its affiliates are directed to contact one of the local offices of Siemens or one
of its affiliates before attempting installation or service procedures.

Contents
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LIST OF FUSES..........................................................................................................................................5
DIP SWITCHES..........................................................................................................................................6
CONTROL LEDS.......................................................................................................................................7
SUBASSEMBLIES AND PCB REPLACEMENT.......................................................................................9
COLLIMATOR LAMP REPLACEMENT...............................................................................................10
SWITCH ON CIRCUIT AND SEQUENCE..............................................................................................11
TABLE DETECTION AND GRID TEST.................................................................................................12
TABLE DRIVER......................................................................................................................................... 12
TABLE DETECTION................................................................................................................................... 12
GRID MOVEMENT TEST............................................................................................................................. 12
TROUBLESHOOTING............................................................................................................................13
1) OPERATING ERRORS ONDISPLAY.......................................................................................................... 13
2) TECHNICALMENU................................................................................................................................ 18
3) TECHNICAL ERRORS IN LOG FILE ......................................................................................................... 20
MEMORY STRING..................................................................................................................................... 21
LIST OF ERROR CODES.............................................................................................................................. 22
ROTATING ANODE STARTER..............................................................................................................23
CALIBRATION OF PROTECTION CIRCUIT ..................................................................................................... 23
FUNCTION CONFIGURATION...................................................................................................................... 25
DEFAULTJUMPER SETTING....................................................................................................................... 25
BRAKE DISABLE FOR HEAVY USE .............................................................................................................. 25
FILAMENT...............................................................................................................................................26
FILAMENT POWER SUPPLY........................................................................................................................ 26
ANODE CURRENT CALIBRATION................................................................................................................ 28
CALIBRATION OF FILAMENT CURRENT PROTECTION................................................................................... 31
CALIBRATION OF FILAMENT VOLTAGE PROTECTION................................................................................... 31
ANODE CURRENT CHECK BY EXTERNAL DEVICE......................................................................................... 32
HIGH VOLTAGE GENERATOR.............................................................................................................33
DESCRIPTION........................................................................................................................................... 33
NON INVASIVE KV CHECK........................................................................................................................ 34
KV CHECK ATTP1/TP2 PCB 94-132......................................................................................................... 34
TEST POINTS AND ADJUSTMENT................................................................................................................ 35
AEC CALIBRATION...............................................................................................................................37
DOSE CALCULATOR.............................................................................................................................38
INTRODUCTION........................................................................................................................................ 38
ACCESSING THE PROGRAM ....................................................................................................................... 38
SYSTEM CONFIGURATIONFOR CALIBRATION ............................................................................................. 42
RADIATION TABLE................................................................................................................................... 42
DOSEMETER CONFIGURATION................................................................................................................... 45
DOSEMETER DATA................................................................................................................................... 47
COMMUNICATIONS WITH MAMMO UNIT..................................................................................................... 50
OPTIONS................................................................................................................................................. 51

Contents
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COMPRESSION SYSTEM .......................................................................................................................52
INTRODUCTION........................................................................................................................................ 52
CONFIGURATION OF MAXIMUM COMPRESSION FORCE................................................................................ 52
CALIBRATION OF MAXIMUM COMPRESSION FORCE.................................................................................... 52
MOTOR CURRENT DETECTOR.................................................................................................................... 52
MOTOR OR CLUTCH REPLACEMENT........................................................................................................... 52
C-ARM ROTATION BRAKE...................................................................................................................53
BRAKE FORCE ADJUSTMENT..................................................................................................................... 53
X-RAY / LIGHT FIELD ALIGNMENT PROCEDURE...........................................................................54
ASSEMBLY / DISASSEMBLY OF ORIGINAL TUBE.......................................................................................... 54
X-RAY BEAM COLLIMATION................................................................................................................... 54
LIGHT / BEAM ALIGNMENT....................................................................................................................... 56
GAS SPRING REPLACEMENT...............................................................................................................58
MAMMOMAT BALANCE / EASY LABEL COMMUNICATION PROTOCOL....................................60
CHANGES TO PREVIOUS VERSION.....................................................................................................62

List of Fuses
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List of Fuses
FUSE HOLDERS
F1 10 x 38 gG 20A
F2 10 x 38 gG 20A
F3 6 x 30 CT 3.15A
F4 6 x 30 CT 3.15A
F5 6 x 30 CT 500mA
F6 10 x 38 gG 10A
F7 5 x 20 CT 40mA
F8 6 x 30 CT 100mA
F9 10 x 38 gG 10A
F10 6 x 30 CT 10A
F11 6 x 30 CT 4A
F12 6 x 30 CT 100mA
PCB 03-186
F1 5 x 20 CT 500mA
F2 5 x 20 CT 500mA
PCB 03-188
F1 5 x 20 ET 1.6A
F2 5 x 20 ET 1A
F3 5 x 20 CT 0.5A
F4 6.3x 32 GT 2A
F11 5 x 20 ET 3.15A
PCB 92-073
F1 6.3x 32 GT 1.6A
F2 6.3x 32 GT 1.6A
PCB 92-074
F1 6 x 30 CT 10A
F2 6 x 30 CT 4A
F3 5 x 20 CT 40mA
INVERTER PCB 94-132
F2 5 x 20 CT 1A
F3 BUSSMANN B1000 20FC 20A 660V

DIP switches
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DIP switches
PCB 01-170 Main CPU
SW1
DIP1 = ON Anode current calibrationmAH
DIP2 = ON Anode current calibration mAL
DIP3 = ON DEMO mode without x-ray
DIP4 = ON Pulsed radiation disabile with grid table
DIP5 = ON AEC frozen to single Film/Screen
DIP6 = OFF Not in use, must remain OFF
DIP7 = ON Compressionforce calibration
DIP8 = ON Mo/Rh filter enabled
SW2
DIP1 = ON C-arm Brake, disabled for service
DIP2 = ON Inverter Vdc input sense disabled
DIP3 = ON Max compression force 200N
DIP4 = ON Exposure start on left to right grid movement
DIP5 = OFF Future expansion
PCB 92-083 Keyboard
Language DIP1 DIP2 DIP3 DIP4
Italian OFF OFF OFF OFF
French ON OFF OFF OFF
English OFF ON OFF OFF
German ON ON OFF OFF
Spanish OFF OFF ON OFF
Polish ON OFF ON OFF
Turkish OFF ON ON OFF
PortugueseON ON ON OFF

Control LEDs
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Control LEDs
CPU 01-170
_________________________________________________________________________________
Color Function
LED1 YELLOW Don’t care
LED2 YELLOW blinking during x-ray
LED3 YELLOW bright during x-ray ( mAs meter pulses)
LED D1 RED IRQ activity monitor, blinks in normal condition;if bright fix CPU
hanged UP
LED DU1 YELLOW internal +2,5Vdc
LED DU2 YELLOW internal +3,3Vdc
LED DU6 RED ON at start UP during FPGA initialization
LED DU8 RED ON during CPU initial reset
LED DU11 YELLOW +5Vdc
CPU Reset sequence
At power ON, LED DU6 and LED DU8 are bright, LED DU8 goes OFF, LED DU6 goes OFF, LED
D1becomes bright fix and after blinks to indicate that CPU is running.

Control LEDs
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Motherboard 03-188
Color Function
DL1 GREEN -15Vdc
DL2 GREEN +15Vdc
DL3 GREEN +24Vdc
DL4 GREEN +5Vdc
DL5 RED bright with x-ray pushbutton pressed
DL6 GREEN -15Vdc delayed at power ON
DL7 GREEN +5Vdc
DL8 RED CPU / Table driver communication monitor, blinks in normal
condition, bright fix during grid movement.
Anode starter 92-074
Color Function
LED1 YELLOW Bright during tube running
LED2 YELLOW Bright during brake or alarm
LED3 YELLOW Bright during brake
LED5 GREEN Bright in Stand by or rotation
LED6 GREEN Bright during rotation
Filament power supply PCB 92-073
Color Function
LED1 GREEN Bright fix in normal condition
LED2 RED don’t care
LED3 RED Bright when Small focal spot is selected
LED4 GREEN Bright with filament ON
LED5 YELLOW bright during exposure. Brightness is directly proportional to anode
current
Inverter control board 94-132
Color Function
DL1 GREEN +15Vdc
DL2 YELLOW bright or blinking during exposure depending on continuous
or pulsed mode

Subassemblies and PCB replacement
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Subassemblies and PCB replacement
When replacing subassemblies and/or PCB, take care of calibration or Firmware version according
the following table :
SIEM.code MTL code Part description Calibration Firmware
08883402 DS/INVC132 Display SP14N003 power supply NO NO
08883410 DS/LMG7401 SP14N003 DISPLAY NO NO
08883436 KTFLA0206 INVERTER module Note (1) NO
08883444 KTFLI0009 H.V. Transformer Note (1) NO
08883451 PCB/01-170-XCPU Board NO YES
08883469 PCB/02-171-0TUBE Temperature sensor NO NO
08883477 PCB/02-179-XC-ARM Service board NO YES
08883485 PCB/03-181-XCPU Keyboard NO YES
08883493 PCB/03-186-XService board NO YES
08883501 PCB/03-187-XSerial port connectors board NO NO
08883519 PCB/03-188-XCPU Mother board YES YES
08883527 PCB/92-073-XFilament power supply YES NO
08883535 PCB/92-074-XAnode starter YES YES
08883543 PCB/92-083-XKeyboard NO NO
08883550 PHTM9000 AEC Detector YES NO
Note (1)
kV check and eventual adjustment is necessary.

Collimator lamp replacement
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Collimator lamp replacement
1) Remove attachment of Face shield protection by means of fourfixing screws
2) Open collimator assembly by removing the four fixing screws
3) replace lamp only with original spare part having the same filament orientation.

Switch ON circuit
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Switch on circuit and sequence
Unit is switched ON by means of main contactor TLR1 and solid state relay RYS1.
Drive and timing circuit is on board of PCB 03-186, powered by TF129.
Switch On sequence
Main contactor TLR1 switches ON at first and dumping resistor R1 smooths inrush current of TF155,
TF165 and capacitors C1,C2,C3,C4.
After few seconds RYS1, with zero cross drive, shorts R1 and full power is available for H.V.
generator and other high power services.
Display and Keyboard initialization
Keyboard (PCB 92-083+03-181) has its own dedicated CPU.
At power ON, empty frame is drawn by keyboard CPU on the display.
When main CPU of PCB 01-170 starts, display frame is filled with icons.
Grid position initialization
At power ON grid is moved to search home position and noise from the table is normal.
Grid home position is at left side from patient position.
Emergency shutdown
Emergency push buttons located on both sides of MAMMOMAT Balance.
Operating Emergency push button will switch OFF immediately main contactor TLR1 and the whole
unit is switched OFF.
ON/OFF pushbutton and control lamp
Connected to CN16 of PCB 03-186 has control lamp inside.
Control lamp is bright when unit is OFF, after switch OFF, lamp blinks for a short time during which
further switch ON is disabled to allow high power circuit to reset.

Table detection and grid test
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Table detection and grid test
Table driver
Table driver is onboard of PCB 03-188 motherboard, it contains both cassette sensing + leds for all
tables and stepper motor driver for grid tables.
Table driver is connected by serial port to main CPU.
Table detection
The following tables are detected by the CPU in order to guarantee the appropriate functionality.
Model Part number
18x24 gridless 83.83.189
18x24 grid 83.83.171
24x30 gridless 83.83.239
24x30 grid 83.83.221
18x24 gridless 1,8 X magnification device 83.83.353
Cassette detection functions are the same for all the tables.
Green LED is bright fix when unexposed cassette is in. Unit could not be ready for exposure
depending on Door Open and/or no collimation plate.
Green LED is blinking for all other conditions.
If cassette notch sensing switch is enabled ( Table internal jumper removed ) and cassette has no
notch, green Led is blinking even if cassette is properly inserted.
Grid tables.
If grid table is recognized, x-ray beam is pulsed. Both large and small focus can be selected from the
control panel.
Gridless tables.
If gridless table, any kind, is recognized, x-ray beam is continuous, small focus is selected
automatically and deselected when gridless table is removed.
Grid movement test
If grid table is inserted, by means of pushbuttons Bell + Compression [-] grid can be moved without
exposure for functionality check.
Grid must oscillate back and forth.
Grid speed is different during the first 7 runs for strokes First right / left, speed for movement must be
regular
Grid movement has time-out of 20” to protect stepper motor.
When Grid movement is activated by main CPU, DL8 of PCB 03-188 becomes bright fix and .LED2
PCB 01-170 blinks following x-ray interruption at grid direction change.
Grid home position is at left side from patient position.

Troubleshooting
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Troubleshooting
o If unit doesn’t switch ON refer to dedicated section of this manual.
o If unit can be switched ON but: no Frame and no Icons appear on the screen and CPU reset
sequence is wrong , check voltages on CPUmotherboard 03-188
o If unit can be switched ON but: Frame and no Icons appear on the screen and CPU reset
sequence is wrong , check CPU 01-170.
o If unit can be switched ON but: no Frame and no Icons appear on the screen and CPU reset
sequence is correct check keyboard 92-083, KEYBOARD CPU 03-181, cable CV0155 and
supply voltages onboard of KEYBOARD 92-083
If the unit is operative fault finding and troubleshooting is based on the followings:
1) Operating or technical errors on display
2) Technical menu
3) Technical errors in Log file
1) Operating errors on Display
Operating errors on Display are described in the Operator’s manual SPB7-115.620.01….
For the technical aspects related to such alarms:
ALARM GAS SPRING DEFECTIVE !
Code Gs
When Any time when unit is ON
Why Gas spring has loosed it’s capacity to balance c-arm suspended masses
Action For Gas Spring replacement refer to “Gas spring replacement” section in this document
For safety reasons unit can’t be operated if Gas Spring is defective.
Alarm can’t be cleared
WARNING

Troubleshooting
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ALARM CHECK ARM PUSH BUTTON
CHECK BRAKE PUSH BUTTONS
CHECK FOOT PEDAL SWITCH
Code Pa
Pb
Pc
When during operating of compression or c-arm rotation or c-arm vertical movement or anytime
for eventual malfunction of pushbuttons or foot pedal switches
.
Why pushbutton or foot pedal switch of mentioned functions remains activated for more than
20”
Action Check pushbuttons or foot pedal switches and eventually disconnect them from the
boards for easier investigation.
Note Alarm goes OFF by itself if normal condition is restored releasing pushbutton or foot pedal
switch.
ALARM CHECK CASSETTE
Code Ci
When At power ON
Why Cassette was inside the table and could be exposed.
Action Remove cassette check it and reinsert.
If alarm comes out without cassette inside check cassette sensing microswitches.
Note Alarm goes OFF by itself if normal condition is restored removing cassette
ALARM DOOR OPEN
Code Do
When Starting exposure
Why Door of Examination room was open when operator pressed x-ray push button
Action Close door or check door contact and / or wiring to PCB 03-186.
Note Alarm goes OFF by itself if normal condition is restored closing the door.
Exposure is not interrupted if door is open after that exposure sequence started.

Troubleshooting
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ALARM ABSENCE OF COLLIMATOR CONE
Code C0
When Starting exposure
Why Collimation plate is missing
Action Insert collimation plate or check sensing microswitch and / or PCB 02-179 and
connection cable to main CPU CV0158
Note Alarm goes OFF by itself if collimation plate is inserted
ALARM
CASSETTE NOT INSERTED
CASSETTE ALREADY EXPOSED
Code Nc
Ce
When Starting exposure
Why Cassette is not inserted or already exposed or cassette sensing switches are defective
Action Insert or replace cassette or check cassette sensing switches
Note Alarm goes OFF by itself if cassette is inserted or removed.
ALARM MIRROR POSITION ERROR
Code Me
When Starting exposure
Why Mirror is not out of field
Action Check if mirror doesn’t move totally or partially for mechanical or electrical problems.
Mirror drive motor has position sensing switch inside that must switch ( audible click )
when is at 60 degrees with respect to the base plate.
Mirror driver is onboard of PCB 02179 connected to the main CPU by CV0158.
ALARM FILTER POSITION ERROR
Code Fi
When Filter changes from Mo to Rh or vice-versa
Why Position sensing switch is not closed
Action Select manual mode, select filters several time to investigate if it’s mechanical or electric
problem.
Filter is driven by PCB 02-179.

Troubleshooting
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ALARM NOT ACTIVE
Code T0
When Starting exposure in automatic mode
Why Film Screen or technique STD, EXT, LD, HC selected on the control panel is not
programmed.
Action Select programmed Film Screen and technique STD, EXT, LD, HC.
If only one is programmed, freeze it by means of DIP5 SW1 PCB 01-170.
If problem persist it’s probably due to memory corruption, transfer again AEC calibration
curve to CPU memory
ALARM EARLY PUSHBUTTON RELEASE
Code Rp
When During exposure
Why Pushbutton has been released before the end of exposure
Pushbutton is defective
Action Inspect pushbutton at sight, select high mAs value and during exposure force: cable,
connector and pushbutton to locate possible false contact.
Replace pushbutton.
Note Display shows exposure mAs and kV
ALARM LOW ANODE CURRENT
Code Bt
When After exposure in MANUAL mode
Why Anode current was below lower limit or zero.
Exposure has been terminated by Back Up Timer.
Action Check anode current calibration according to specific section of this manual.
Also check kV value according to specific section of this manual.
Alarm can also depend on malfunction of V/F converter onboard of PCB 92-073, event
counter on board of PCB 01-170 and cable CV0173.
To investigate mAs integrator, check LED5 PCB 92-073 and LED3 PCB 01-170
For further investigation, external Dose meter or radiographic cassette with film can be
used to detect if x-ray are generated or not.
LOW ANODE CURRENT could also be due to H.V. generator defect or failure, check it as
described in dedicated section of this manual.

Troubleshooting
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ALARM AEC DETECTOR OVER EXPOSED
Code A1
When After pre exposure
Why Breast and / or detector position is/ are wrong, part of detector was exposed to direct x-
ray beam.
Breast or phantom density was too low.
Action Check for proper breast / detector positioning or thin phantom.
Note Film must be replaced.
Delivered mAs are less than 1 mAs
ALARM BREAST TOO DENSE
Code A0
When After pre exposure
Why Breast density is too high and [p] value lower than limit selected during AEC calibration
Breast could have silicone prosthesis.
Refer to AEC calibration procedure for [p] lower limit calibration.
Action Reduce breast density and check for AEC calibration with reference phantom.
Note Film must be replaced.
Delivered mAs are less than 1 mAs
ALARM
LOW mAs SELECTION WITH AEC
Code Mi
When After exposure
Why Could happen with magnification and small focus if grid table is used and breast is large or
very dense.
Can also happen for calibration problems or system malfunction.
Action Evaluate operating conditions and eventually use One point mode with higher kV.
Note Quite impossible with large focus, if happens check very carefully mA, kV, [r] and [o]
calibrations.

Troubleshooting
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ALARM TUBE THERMAL LIMIT REACHED
Code HU
When Starting exposure
Why X-ray tube assembly has reached maximum operating temperature.
Action Wait for tube cooling.
Evaluate operating conditions from last 1300 exposure memory.
Check tube temperature sensor PCB 02-171.
Disable tube rotation brake.
ALARM TECHNICAL ERROR
Code Refer to list
When Any time.
Why Internal error having no meaning for the operator.
Action Check Log File to find out what it is.
Date and time of error / fault can be helpful to locate it quickly
2) Technical menu
When Any time.
Why Broken Fuse or defective block has been located by CPU diagnostic functions
Action Check Log File to find out when it occurred
SIEMENS AG
CPU 01-170 F2=OK F4=OK
SW1 00000000 SW2 0000
INVERTER Vdc (in) = 545 V LV= OK
Filament 92-073 >> PASS <<
Rotating Anode 92-074 >> PASS <<
FIRMWARE REV BAL__ XX TUBE
Tube Housing kJ
25°C
n. .............. ../../.. ..................

Troubleshooting
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Fault CPU fuses F2 or F4
Action Replace fuse
Fault Filament 92-073 >> FAIL <<
Action 1) check LED status of PCB 92-073
2) if problem persists after having switched the Unit off and on again, verify the integrity of
fuses F1 F2 PCB 92-073 and of filaments by an ohmmeter.
3) if Alarm Code is T2 it was generated during preparation, check for eventual corruption
of filament calibration values
Check also calibration of Over-current and Over-voltage protection circuits.
4) if Alarm Code is R2 it was generated during exposure check calibration of Over-current
and Over-voltage protection circuits.
5) if in doubt that filament board safety circuits are not recognized by CPU, they can be
simulated by means of jumpers on the flat cable CV0173.
Fault Rotating anode 92-074 >> FAIL <<
Action 1) check LED status of PCB 92-074
2) if problem occurs when the unit is in stand by check that flat cable CV174 connecting
PCB 92-074 and PCB 01-
170 has been correctly seated. Also check fuses F1 and F3 of
PCB 92-074
3) if problem occurs in preparation error code is T1 check for line voltage, protection
circuit calibration of PCB 92-074, voltage across shift capacitors C5 and C6 that typically
is about 120 Vac ( 50hz) during anode running. If voltage is lower shift capacitor is
probably defective. For capacitor voltage check, protection circuit has to be disabled.
4) if problem occurs during exposure, error code is R1 check the same as above point 3
5) alarm can also occur due to tube overheating when internal thermo switch opens.
6) if in doubt that starter board safety circuits are not recognized by CPU, they can be
simulated by means of jumpers on CN5 PCB 01-170 or flat cable CV0174.
CN
5

Troubleshooting
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Fault INVERTER
Action 1) if problem is LV=NOK and LED DL1 is Dark replace F2
2) if problem is LV=NOK and LED DL1 is Bright check flat cable CV0172 end eventually
simulate inverter block by means of Jumpers on CN3 PCB 01-170
3) If technical menu appears with Vdc (in)= 000 then F3of PCB 94-132 is broken,
inverter block 08883436 and H.V. transformer 08883444 must be replaced.
4) If technical menu appears with Vdc (in) = 270 VF6 or F9 is broken.
For investigation of INVERTER Vdc problems, sensing circuit and alarm can be disabled
by means of DIP2 SW2 PCB 01-170.
Vdc voltage sensing is connected at CN4 PCB 94-132 and CN9 PCB 03-188, connection
cable is CV0164.
Normal voltage across CN9 with cable CV0164 connected is about 19,5Vdc.
Voltage across CN4 PCB 94-132 is about 47 Vdc with CV0164 disconnected
Vdc (in) drop is about 100Vdc during exposure and ripple in the same condition is
typically 50 Vpp.
If Vdc drop and ripple voltage are much higher capacitors C1,C2,C3,C4 must be replaced
Note For kV problems refer to High Voltage generator section in this manual
3) Technical errors in LOG file
CPU of MAMMOMAT Balance has a memory with the last 1300 events including errorsand fault
events.This 1300 events can be uploaded on the PC.
Choose Error log,
insert a comment, press Start and press the two buttons Alarm reset and Optical density plus on the
mammocontemporarily.
CN3