Siemens Uroskop ACCESS Troubleshooting Manual Download Page 13 | Manualshive

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Siemens Uroskop ACCESS Troubleshooting Manual Download Page 13

5 - 1

Siemens AG

SPL5-330.840.01

Page 1 of 12

Uroskop ACCESS

Medical Solutions

Rev. 01

03.03

CS SD 24

Endoscopy Option

Error Correction

5

5

Smearing

5

Object smearing during movement is a characteristic of digital cameras and monitors
caused by the pixel refresh rate. The characteristic varies depending on the camera man-
ufacturer and type. In addition, this characteristic may be caused (to a lesser extent) by
the TFT manufacturer and type.

•

The problem cannot be corrected by adjusting the monitor.

Delay

5

Similar to smearing, delays in the display movement are caused by additional image scan-
ning. There is a slight delay between the movement in front of the camera and the visible
change at the TFT monitor.

•

The problem cannot be corrected by adjusting the monitor.

Tearing

5

Tearing is caused by incorrect synchronization. Measure the video signal at the endos-
copy interface input. The synchronizing signal has to be 300mVolt and the maximum
image signal 700mVolt. The dynamic changes in video signal voltage can be evaluated on
the oscilloscope during movements or significant light changes in front of the camera
optics. The image signal may not exceed 700 mVolt. If this value is exceeded, the entire
video signal is greater than 1 Volt Peak/Peak, which may result in synchronization failure.

•

Correct the error by adjusting the camera to a video signal of 1 Volt Peak/Peak,
specifically by limiting the video signal. If the camera cannot be set, use a camera with a
standard output signal of 1 Volt Peak/Peak (authorized customer service personnel from
the camera manufacturer are responsible for adjusting the endoscopy camera).

•

The video signal can be reduced by approx. 30% (only in exceptional cases) by
connecting a terminal resistor (75 Ohm termination) to the video output at the back of the
endoscopy interface. The front of the interface has to be removed to connect the resistor.
- A T plug is connected to the video output of the endoscope. One connector is attached

to one side of the video cable for the monitor, and the other is connected to a 75 Ohm
termination, which reduces the video signal at the endoscopy interface output.

If in doubt, connect a CRT video monitor (PAL/NTSC) parallel to
the endoscope in order to clearly determine whether the cause of
the error is the endoscope or the monitor.

NOTICE

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Summary of Contents for Uroskop ACCESS

Page 1: ...eproduction 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 SP Endoscopy Option Troubleshooting Guide ...

Page 2: ...on 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 authori zed by Siemens or one of its a...

Page 3: ...______________________________ 3 1 TFT Monitor is Dark 3 1 TFT Monitor Remains in X ray Mode 3 1 TFT Monitor Switches Back to X ray Mode 3 1 Colors Displayed Incorrectly at TFT Monitor 3 1 4 _______Error Description_______________________________________________ 4 1 Smearing 4 1 Delay 4 1 Tearing 4 1 Skipping 4 1 Blooming 4 1 Image Sector Size 4 1 5 _______Error Correction_________________________...

Page 4: ...0 4 Contents Uroskop ACCESS SPL5 330 840 01 Page 4 of 4 Siemens AG Endoscopy Option Rev 01 03 03 CS SD 24 Medical Solutions This page intentionally left blank ...

Page 5: ...ere to all general safety information for medical devices when performing any activi ties or tests specified in this manual Product Specific Information 1 Required Documents 1 Operating instructions for the TFT Monitor Operating instructions for the camera light source Required Tools and Measurement Devices 1 Standard tool kit 100 Mhz oscilloscope e g Tektronix 2335 also refer to ARTD 3 Mavo Monit...

Page 6: ...Uroskop ACCESS SPL5 330 840 01 Page 2 of 2 Siemens AG Endoscopy Option Rev 01 03 03 CS SD 24 Medical Solutions 1 2 General Information This page intentionally left blank ...

Page 7: ...ality may occur because endoscopy video cameras of various manufacturers are used These cameras may provide a higher or lower video signal than indicated by the standard The video signal standard has been set at 1 Volt Peak Peak 700 mV image signal 300 mV synchronizing signal Endoscopes of various sizes may be used with different lenses and fields of view depending on the examination Accordingly t...

Page 8: ... for the reference monitor are set once at the factory for all modes Color is set at the factory for 4 basic settings which can be selected in the Brightness Contrast menu Settings 1 2 and 3 are fixed values the user may set the colors desired under the user setting 1 used primarily for X ray reference the image is somewhat light and blue 2 used both for X ray and endoscopy the image is neutral 3 ...

Page 9: ...or remains in X Ray mode Possible causes 230V supply voltage not connected to the interface Action Check the plug connections check the supply voltage TFT Monitor Switches Back to X ray Mode 3 Endo image is not displayed at the TFT monitor The message no signal is displayed at the monitor and it switches back to X ray mode Possible causes The output signal from the camera intensifier is not at the...

Page 10: ...Uroskop ACCESS SPL5 330 840 01 Page 2 of 2 Siemens AG Endoscopy Option Rev 01 03 03 CS SD 24 Medical Solutions 3 2 Video Signal Errors This page intentionally left blank ...

Page 11: ...ng information appears similar to torn out black and white triangles of various sizes Skipping 4 When moving the endoscope in transverse direction side to side in a large hollow body such as the bladder the image appears to briefly freeze and then reconstruct This effect is common in discos when strobe lights are switched on people s movements appear dis jointed Blooming 4 Blooming occurs with lig...

Page 12: ...Uroskop ACCESS SPL5 330 840 01 Page 2 of 2 Siemens AG Endoscopy Option Rev 01 03 03 CS SD 24 Medical Solutions 4 2 Error Description This page intentionally left blank ...

Page 13: ...g movements or significant light changes in front of the camera optics The image signal may not exceed 700 mVolt If this value is exceeded the entire video signal is greater than 1 Volt Peak Peak which may result in synchronization failure Correct the error by adjusting the camera to a video signal of 1 Volt Peak Peak specifically by limiting the video signal If the camera cannot be set use a came...

Page 14: ...ions The problem cannot be corrected by adjusting the monitor Blooming 5 Blooming can have different causes 5 Do not disconnect the plug when testing the video signal at the endoscopy interface input otherwise the 75 Ohm termination will fail Example of video signal at the oscilloscope with a pair of chrome plated pliers The video signal truncates reaches saturation at 700 mVolt refer to the arrow...

Page 15: ...le from the light source controller to the camera amplification is missing or defective The light regulator is defective 3 Monitor 5 If the brightness or contrast are set incorrectly the image will appear to too bright or flat or black regions will appear gray Note when switching on the OSD Operating Screen Display for TFT Monitors 18 Monitor To block or unblock the OSD menu quickly press within 1...

Page 16: ...ideo input of the TFT monitor to the video level from the endoscopy camera Use the contrast control for the bright white region Use the brightness control for the dark black region The bright glaring image areas may be slowly darkened by reducing the contrast until image noise transition from glaring white to regular white is detected The settings may be made as shown in the following sample image...

Page 17: ...5 330 840 01 Page 5 of 12 Uroskop ACCESS Medical Solutions Rev 01 03 03 CS SD 24 Endoscopy Option Example of the test configuration with chrome plated pliers Example of the test configuration with a chrome plated Allen wrench Fig 2 Fig 3 ...

Page 18: ...CS SD 24 Medical Solutions 5 6 Error Correction Example of the test configuration with chrome plated pliers contrast too low Arrow 1 The reflective areas of the pliers do not appear bright The entire image seems to be cov ered in gray Arrow 2 The structure of the pliers is visible Fig 4 ...

Page 19: ...rome plated pliers contrast OK Arrow 1 The reflective areas of the pliers appear almost too bright and glaring and have a notice able white border which indicates the beginning of camera overmodulation The reflective areas still indicate noise in the image Arrow 2 When the monitor is set correctly the structure of the pliers is visible without any satura tion effects Fig 5 ...

Page 20: ... the correct contrast setting to a high contrast setting there is little change in the color of the reflective areas of the pliers The reflective areas of the pliers appear bright and glaring and do not have a white border Image noise cannot be detected in the reflective areas Arrow 2 The base structures disappear due to the saturation effect overmodulation at the analog monitor input As a result ...

Page 21: ...utions Rev 01 03 03 CS SD 24 Endoscopy Option Example of the test configuration with a chrome plated Allen wrench contrast too low Arrow 1 The reflective areas of the Allen wrench do not appear bright The entire image seems to be covered in gray Arrow2 The base structure is visible Fig 7 ...

Page 22: ...th a chrome plated Allen wrench contrast OK Arrow 1 The reflective areas of the Allen wrench appear almost bright and glaring and have a noticeable white border indicating the beginning of camera overmodulation The reflective areas still indicate noise in the image Arrow 2 When the monitor is set correctly the base structures are visible without saturation effects Fig 8 ...

Page 23: ...the correct contrast setting to a high contrast setting there is little change in the color of the reflective areas of the Allen wrench The reflective areas of the Allen wrench appear bright and glaring and do not have a white border Image noise can not be detected in the reflective areas Arrow 2 The base structures disappear due to the saturation effect overmodulation at the analog monitor input ...

Page 24: ...k areas This may be a dark area in the image or may be shaded at the optic input Image Sector Size 5 The circular image section may shift because of obsolete camera connectors snap lock or connectors that have not been properly adjusted Replace the old endoscope Incorrect image sizes may result when using endoscopes from different manufacturers Use the endoscope provided by the camera manufacturer...

Page 25: ...6 1 Siemens AG SPL5 330 840 01 Page 1 of 2 Uroskop ACCESS Medical Solutions Rev 01 03 03 CS SD 24 Endoscopy Option Changes to previous version 6 n a ...

Page 26: ...Uroskop ACCESS SPL5 330 840 01 Page 2 of 2 Siemens AG Endoscopy Option Rev 01 03 03 CS SD 24 Medical Solutions 6 2 Changes to previous version This page intentionally left blank ...

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