Siemens Mammomat Balance Troubleshooting Guide
Print No.: SPB7
-
115.840.01.0
2
.02
Replaces
: SPB7
-
115.840.01.01.02
duction, transmission or
use of this document or its contents
is not permitted without express
written authority. Offenders will be
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grant or registration of a utility model
English
MAMMOMAT Balance
Troubleshooting Guide
Service Instructions (incl)
SP
© Siemens AG 2004
The repro
or_ design, _are_ reserved.
Doc. Gen. Date: 10.04
Revision
rized by Siemens or one of its affiliates are directed to contact one of the local offices of Siemens or one
Chapter Page Revision
all all 02
Document revision level
The document corresponds to the version/revision level effective at the time of system delivery. Revisions 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 authoof its affiliates before attempting installation or service procedures.
MAMMOMAT Balance SPB7-115.840.01 Page 2 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Contents
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 ON DISPLAY.......................................................................................................... 13
2) TECHNICAL MENU ................................................................................................................................ 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
DEFAULT JUMPER 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 AT TP1/TP2 PCB 94-132......................................................................................................... 34
TEST POINTS AND ADJUSTMENT ................................................................................................................ 35
AEC CALIBRATION...............................................................................................................................37
DOSE CALCULATOR.............................................................................................................................38
INTRODUCTION........................................................................................................................................ 38
ACCESSING THE PROGRAM ....................................................................................................................... 38
SYSTEM CONFIGURATION FOR CALIBRATION ............................................................................................. 42
RADIATION TABLE................................................................................................................................... 42
DOSEMETER CONFIGURATION...................................................................................................................45
DOSEMETER DATA................................................................................................................................... 47
COMMUNICATIONS WITH MAMMO UNIT..................................................................................................... 50
OPTIONS................................................................................................................................................. 51
MAMMOMAT Balance SPB7-115.840.01 Page 3 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Contents
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
MAMMOMAT Balance SPB7-115.840.01 Page 4 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
List of Fuses
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
MAMMOMAT Balance SPB7-115.840.01 Page 5 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
DIP switches
DIP switches
PCB 01-170 Main CPU
SW1
DIP1 = ON Anode current calibration mAH
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 Compression force 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
Portuguese ON ON ON OFF
MAMMOMAT Balance SPB7-115.840.01 Page 6 of 62 Siemens AG
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Control LEDs
Control LEDs
CPU 01-170
_________________________________________________________________________________
Color Function
LED1
LED2
LED3
LED D1
LED DU1
LED DU2
LED DU6
LED DU8
LED DU11
YELLOW Don’t care
YELLOW
YELLOW
RED
YELLOW
YELLOW
RED
RED
YELLOW
blinking during x-ray
bright during x-ray ( mAs meter pulses)
IRQ activity monitor, blinks in normal condition; if bright fix CPU
hanged UP
internal +2,5Vdc
internal +3,3Vdc
ON at start UP during FPGA initialization
ON during CPU initial reset
+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.
MAMMOMAT Balance SPB7-115.840.01 Page 7 of 62 Siemens AG
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Motherboard 03-188
Color Function
DL1
DL2
DL3
DL4
DL5
DL6
DL7
DL8
Anode starter 92-074
Color Function
LED1
LED2
LED3
LED5
LED6
Filament power supply PCB 92-073
Color Function
LED1
LED2
LED3
LED4
LED5
Inverter control board 94-132
Color Function
DL1
DL2
GREEN -15Vdc
GREEN +15Vdc
GREEN +24Vdc
GREEN +5Vdc
RED
GREEN -15Vdc delayed at power ON
GREEN +5Vdc
RED CPU / Table driver communication monitor, blinks in normal
YELLOW Bright during tube running
YELLOW Bright during brake or alarm
YELLOW Bright during brake
GREEN Bright in Stand by or rotation
GREEN Bright during rotation
GREEN Bright fix in normal condition
RED don’t care
RED Bright when Small focal spot is selected
GREEN Bright with filament ON
YELLOW
GREEN
YELLOW bright or blinking during exposure depending on continuous
bright with x-ray pushbutton pressed
condition, bright fix during grid movement.
bright during exposure. Brightness is directly proportional to anode
current
+15Vdc
or pulsed mode
Control LEDs
MAMMOMAT Balance SPB7-115.840.01 Page 8 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Subassemblies and PCB replacement
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
08883444 KTFLI0009 H.V. Transformer
08883451 PCB/01-170-X CPU Board NO
08883469 PCB/02-171-0 TUBE Temperature sensor NO NO
08883477 PCB/02-179-X C-ARM Service board NO
08883485 PCB/03-181-X CPU Keyboard NO
08883493 PCB/03-186-X Service board NO
08883501 PCB/03-187-X Serial port connectors board NO NO
08883519 PCB/03-188-X CPU Mother board
08883527 PCB/92-073-X Filament power supply
08883535 PCB/92-074-X Anode starter
08883543 PCB/92-083-X Keyboard NO NO
08883550 PHTM9000 AEC Detector
Note (1)
kV check and eventual adjustment is necessary.
Note (1)
Note (1)
YES
YES
YES
YES
YES YES
YES
YES YES
YES
NO
NO
NO
NO
MAMMOMAT Balance SPB7-115.840.01 Page 9 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Collimator lamp replacement
Collimator lamp replacement
1) Remove attachment of Face shield protection by means of four fixing screws
2) Open collimator assembly by removing the four fixing screws
3) replace lamp only with original spare part having the same filament orientation.
MAMMOMAT Balance SPB7-115.840.01 Page 10 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Switch ON circuit
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 RY S1, 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.
MAMMOMAT Balance SPB7-115.840.01 Page 11 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Table detection and grid test
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 cas sette 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.
MAMMOMAT Balance SPB7-115.840.01 Page 12 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Troubleshooting
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 CPU motherboard 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
Code
When
Why
Action
For safety reasons unit can’t be operated if Gas Spring is defective.
WARNING
Alarm can’t be cleared
Any time when unit is ON
Gas spring has loosed it’s capacity to balance c-arm suspended masses
For Gas Spring replacement refer to “Gas spring replacement” section in this document
GAS SPRING DEFECTIVE !
Gs
MAMMOMAT Balance SPB7-115.840.01 Page 13 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
Note
Troubleshooting
CHECK ARM PUSH BUTTON
CHECK BRAKE PUSH BUTTONS
CHECK FOOT PEDAL SWITCH
Pa
Pb
Pc
during operating of compression or c-arm rotation or c-arm vertical movement or anytime
for eventual malfunction of pushbuttons or foot pedal switches
.
pushbutton or foot pedal switch of mentioned functions remains activated for more than
20”
Check pushbuttons or foot pedal switches and eventually disconnect them from the
boards for easier investigation.
Alarm goes OFF by itself if normal condition is restored releasing pushbutton or foot pedal
switch.
CHECK CASSETTE
Ci
At power ON
Cassette was inside the table and could be exposed.
Remove cassette check it and reinsert.
If alarm comes out without cassette inside check cassette sensing microswitches.
Alarm goes OFF by itself if normal condition is restored removing cassette
DOOR OPEN
Do
Starting exposure
Door of Examination room was open when operator pressed x-ray push button
Close door or check door contact and / or wiring to PCB 03-186.
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.
MAMMOMAT Balance SPB7-115.840.01 Page 14 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
ALARM
Code
When
Why
Action
Troubleshooting
ABSENCE OF COLLIMATOR CONE
C0
Starting exposure
Collimation plate is missing
Insert collimation plate or check sensing microswitch and / or PCB 02-179 and
connection cable to main CPU CV0158
Alarm goes OFF by itself if collimation plate is inserted
CASSETTE NOT INSERTED
CASSETTE ALREADY EXPOSED
Nc
Ce
Starting exposure
Cassette is not inserted or already exposed or cassette sensing switches are defective
Insert or replace cassette or check cassette sensing switches
Alarm goes OFF by itself if cassette is inserted or removed.
MIRROR POSITION ERROR
Me
Starting exposure
Mirror is not out of field
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.
FILTER POSITION ERROR
Fi
Filter changes from Mo to Rh or vice-versa
Position sensing switch is not closed
Select manual mode, select filters several time to investigate if it’s mechanical or electric
problem.
Filter is driven by PCB 02-179.
MAMMOMAT Balance SPB7-115.840.01 Page 15 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
ALARM
Code
When
Why
Action
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
Troubleshooting
NOT ACTIVE
T0
Starting exposure in automatic mode
Film Screen or technique STD, EXT, LD, HC selected on the co ntrol panel is not
programmed.
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
EARLY PUSHBUTTON RELEASE
Rp
During exposure
Pushbutton has been released before the end of exposure
Pushbutton is defective
Inspect pushbutton at sight, select high mAs value and during exposure force: cable,
connector and pushbutton to locate possible false contact.
Replace pushbutton.
Display shows exposure mAs and kV
LOW ANODE CURRENT
Bt
After exposure in MANUAL mode
Anode current was below lower limit or zero.
Exposure has been terminated by Back Up Timer.
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.
MAMMOMAT Balance SPB7-115.840.01 Page 16 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
Note
ALARM
Code
When
Why
Action
Note
Troubleshooting
AEC DETECTOR OVER EXPOSED
A1
After pre exposure
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.
Check for proper breast / detector positioning or thin phantom.
Film must be replaced.
Delivered mAs are less than 1 mAs
BREAST TOO DENSE
A0
After pre exposure
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.
Reduce breast density and check for AEC calibration with reference phantom.
Film must be replaced.
Delivered mAs are less than 1 mAs
LOW mAs SELECTION WITH AEC
Mi
After exposure
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.
Evaluate operating conditions and eventually use One point mode with higher kV.
Quite impossible with large focus, if happens check very carefully mA, kV, [r] and [o]
calibrations.
MAMMOMAT Balance SPB7-115.840.01 Page 17 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
Tube Housing kJ
ALARM
Code
When
Why
Action
ALARM
Code
When
Why
Action
Troubleshooting
TUBE THERMAL LIMIT REACHED
HU
Starting exposure
X-ray tube assembly has reached maximum operating temperature.
Wait for tube cooling.
Evaluate operating conditions from last 1300 exposure memory.
Check tube temperature sensor PCB 02-171.
Disable tube rotation brake.
TECHNICAL ERROR
Refer to list
Any time.
Internal error having no meaning for the operator.
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
Why
Action
Any time.
Broken Fuse or defective block has been located by CPU diagnostic functions
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
25°C
n. .............. ../../.. ..................
MAMMOMAT Balance SPB7-115.840.01 Page 18 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
170 has been correctly seated. Also check fuses F1 and F3 of
CN5
Fault
Action
Fault
Action
Troubleshooting
CPU fuses F2 or F4
Replace fuse
Filament 92- 073 >> FAIL <<
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 circu its.
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
Action
Rotating anode 92- 074 >> FAIL <<
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 01PCB 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.
MAMMOMAT Balance SPB7-115.840.01 Page 19 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
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