This document provides service instructions for the Siemens MEMOSKOP 2/3/50/100/SUB, designed for use in conjunction with SIREMOBIL 2000, UROSKOP D1/D2, and LITHOSTAR Multiline systems. It outlines the necessary procedures for maintenance, software loading, service menu access, electrical settings, PC board replacement, laser camera timing, and details changes compared to previous versions.
Function Description
The MEMOSKOP series (2/3/50/100/SUB) serves as a critical component in medical imaging systems, primarily for image acquisition, processing, and display. It integrates with various Siemens medical devices, including mobile C-arms (SIREMOBIL 2000), urology workstations (UROSKOP D1/D2), and lithotripsy systems (LITHOSTAR Multiline). The device is responsible for managing and displaying X-ray images, providing essential visual feedback for diagnostic and interventional procedures. Its core function involves capturing images, storing them in memory, and presenting them on a monitor, often with options for hardcopy output. The MEMOSKOP also supports various image processing functions and allows for system configuration and diagnostic testing through a dedicated service menu.
Important Technical Specifications
The document provides detailed timing specifications for hardcopy output, differentiating between 525 / 60 Hz and 625 / 50 Hz systems, which correspond to NTSC and PAL video standards, respectively.
Hardcopy Output, 525 / 60 Hz, MEMOSKOP 3, 50, SUB:
- Horizontal Frequency: 15.750 kHz (or pixels)
- Horizontal Line Time: 63.492 µsec (or 853.33 pixels)
- Horizontal Sync Tip: 4.4643 µsec (or 60.00 pixels)
- Horizontal Back Porch: 12.21 µsec (or 164.1 pixels)
- Horizontal Active Video: 38.0952 µsec (or 512.00 pixels)
- Horizontal Front Porch: 8.72 µsec (or 117.2 pixels)
- Horizontal Blanking: 25.3968 µsec (or 341.33 pixels)
- Vertical Field Frequency: 60.000 Hz
- Vertical Field Time: 16.6667 msec (or 262.5 lines)
- Vertical Sync Tip: 0.1905 msec (or 3.0 lines)
- Vertical Back Porch: 1.524 msec (or 24.0(24.5) lines)
- Vertical Field Active Video: 14.0952 msec (or 222.0 lines)
- Vertical Front Porch: 0.825 msec (or 13.0(13.5) lines)
- Vertical Field Blanking: 2.5397 msec (or 40.0(41.0) lines)
- Interlaced Fields: Yes/--
- Image Circle: 509 x 466 (H-pixel x V-pixel)
- Pixel Clock Image: 13.44 MHz (1 pixel = 74.404762 ns)
- Pixel Clock Text: 13.44 MHz
- Pixel Aspect Ratio: 0.916:1 (width/height)
- Memory: 512 x 444 (H-pixel x V-pixel)
Hardcopy Output, 625 / 50 Hz, MEMOSKOP 3, 50, SUB:
- Horizontal Frequency: 15.625 kHz (or pixels)
- Horizontal Line Time: 64.000 µsec (or 853.33 pixels)
- Horizontal Sync Tip: 4.500 µsec (or 60.00 pixels)
- Horizontal Back Porch: 12.800 µsec (or 170.67 pixels)
- Horizontal Active Video: 38.400 µsec (or 512.00 pixels)
- Horizontal Front Porch: 8.300 µsec (or 110.67 pixels)
- Horizontal Blanking: 25.600 µsec (or 341.33 pixels)
- Vertical Field Frequency: 50.000 Hz
- Vertical Field Time: 20.000 msec (or 312.5 lines)
- Vertical Sync Tip: 0.160 msec (or 2.5 lines)
- Vertical Back Porch: 2.272 msec (or 35.5(36.0) lines)
- Vertical Field Active Video: 16.384 msec (or 256.0 lines)
- Vertical Front Porch: 1.152 msec (or 18.0(18.5) lines)
- Vertical Field Blanking: 3.584 msec (or 56.0(57.0) lines)
- Interlaced Fields: Yes/-- or
- Image Circle: 496 x 548 (H-pixel x V-pixel)
- Pixel Clock Image: 13.333 MHz (1 pixel = 75 ns)
- Pixel Clock Text: 13.333 MHz
- Pixel Aspect Ratio: 1.105:1 (width/height)
- Memory: 512 x 512 (H-pixel x V-pixel)
The laser camera timing section also defines default values for:
- Precontact time (TV): 100 ms
- Contact time (TK): 200 ms
- Postcontact time (TN): 5000 ms
Usage Features
The MEMOSKOP offers several features for system operation and service:
- Service Menu Access: A dedicated service menu can be accessed through specific key combinations on the control console (for SIREMOBIL 2000) or keyboard (for UROSKOP D1/D2). This menu allows technicians to perform various diagnostic and configuration tasks.
- Memory and TV Test Images: Within the service menu, users can call up memory and TV test images to check image quality and system functionality. For SIREMOBIL 2000, this involves pressing specific buttons on the control console. For UROSKOP D1/D2, a sequence of keyboard inputs is used to activate a setup mode and then enter numerical codes for different test images (e.g., SMPTE-similar, gray wedge, black/white step).
- Electrical Settings/Programming: The device allows for electrical settings and programming, particularly when replacing PC boards or configuring the system for different TV standards (60Hz/120Hz or 50Hz/100Hz memory output). This is done via keyboard input in a setup mode.
- Software Loading: The MEMOSKOP supports software downloads, which are crucial after certain PC board replacements. The procedure for software loading is referenced in external service instructions specific to SIREMOBIL 2000, LITHOSTAR Multiline, and UROSKOP D1/D2.
- Laser Camera Timing: The system allows for adjustment of laser camera timing parameters (precontact, contact, and postcontact times). This is performed through a setup mode accessed via keyboard inputs, with specific hexadecimal codes used to set the desired timing values.
Maintenance Features
The document emphasizes several key aspects of maintenance for the MEMOSKOP:
- Safety Notes: Strict adherence to safety protocols is required, including always switching off the system and disconnecting power before removing covers. ESD regulations must be observed during PC board replacement.
- Documentation Requirements: Technicians are directed to specific Siemens service instructions for detailed procedures related to SIREMOBIL 2000, LITHOSTAR Multiline, and UROSKOP D1/D2.
- Required Tools: A list of essential measurement instruments, auxiliary devices, and tools is provided, including a digital multimeter (Fluke 8060A), service PC, service tool kit, MEMOSKOP keyboard, protective conductor meter, and a serial PC connection cable.
- Visual Inspection: Regular visual checks are recommended to identify any damage or loose mountings, as well as to ensure warning labels are complete and legible. Cables and connectors should also be inspected for damage.
- Electrical Safety: A protective conductor test is mandatory after all service work is completed and covers are reattached. The protective conductor resistance must not exceed 0.2 Ω. Proper installation of PC board shielding is also highlighted for EMC compliance.
- Cleaning: Routine cleaning of the fan and removal of dust/dirt are specified to maintain optimal performance.
- Functional Inspection: After maintenance, a functional check and image quality test must be performed in accordance with the associated documentation (diagnostic test, IQ binder).
- PC Board Replacement: Detailed instructions are provided for replacing various PC boards (D1, D2, D21, D22, D23, D3, D4, D17, D18) and the disk drive MS1. These procedures often involve removing covers, disconnecting plugs, handling flat ribbon cables carefully, and reattaching components. Specific instructions are given for different MEMOSKOP models (2/2K, 3, 50, 100, SUB 2000) and integrated systems.
- Software Download and Configuration: After replacing certain PC boards (e.g., D1, D2, D18), a software download and subsequent configuration via the keyboard may be necessary to ensure proper system operation.
- Cover Removal and Attachment: Specific steps are outlined for safely removing and reattaching covers on the SIREMOBIL 2000 basic unit, side cover, and monitor trolley, as well as for LITHOSTAR Multiline and UROSKOP D1/D2 unit cabinets. Emphasis is placed on proper realignment of contact springs and ensuring protective conductors are correctly connected.
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