Speco Technologies VM-1201 service manual Video input block, Vertical & horizontal processor

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Snubber circuitSnubber C907, D902, R902.

Primary side self-powering circuitD903,C914.

Output 13.5 volts for vertical & horizontal drive circuitsD904, C915.

Output 27.5volts for horizontal deflection circuitD906 ,C916.

2.2Video input block

Signal input buffering and switch

CVBS Input buffer Q201 & R201,R202.

Video filter & output stage.

Video inputThrough C202 to W202 (Contrast VR ) and differential amplifier Q202, Q203.

Video amplifier: Cascade amplifier R219, Q204, Q205, R222, C206.

Brightness control:VR201, R214, R225, R226, Q204.

2.3Vertical & horizontal processor

2.3.1 Vertical guard:

This vertical feedback signal on pin2 when the level on pin 2 is below 0.35v or high than 1.85v the guide circuit inserts a continuous level of 2.5V in the sandcastle output signal of pin 17.The results in the blanking of the picture displayed, thus preventing a burnt-in horizontal line.

2.3.2 Vertical drive output:

The drive o/p pin1 of U401 delivers a drive current of 1.5mA at 5V output through R302 to U402 pin1.

2.3.3 Sync separator:

The video input through C401, R401 and filter C402 to pin 5 of U401.The Sync separator is designed such that the slicing level is independent of the amplitude of the Sync pulse. The

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Contents Model Disclaimer APPENDIX: Spare Parts List Schematics and PCB Layout Diagram Operating Environment Operational SpecificationFunctional Specification Signal Input RequirementsPower Input Requirements Display Quality Physical Specifications Controls and adjustmentsMain Power Supply Block Vertical & horizontal processor Video input blockVertical Deflection Block Phase detectorSupply pin9, 10 Mute output and 50/60HZ identification pin13Horizontal Deflection Block 1No Display, No Power2No Display, power output normal 3No Display No Raster4Vertical Deflection Failure FBT Appendix A. Spare Parts ListAppendix B. Schematics and PCB Layout Diagram VR Board VM-901B/1201/1501B W/AUDIO Main Board

VM-1201 specifications

Speco Technologies is known for its commitment to providing high-quality surveillance solutions, and the VM-1201 is no exception. This innovative video monitor is designed to meet the needs of modern security systems while offering impressive features that enhance both performance and usability.

One of the standout characteristics of the VM-1201 is its 12-inch display, which provides clear and crisp video footage. This size strikes an excellent balance, making it suitable for various applications, whether for personal use, business security, or monitoring large areas in a facility. The monitor supports various video inputs, allowing users to connect multiple cameras and display them simultaneously. This versatility is particularly beneficial for security personnel who require real-time monitoring of multiple feeds.

Another key feature of the VM-1201 is its high-resolution display, which ensures that every detail is captured and displayed accurately. This is critical in a surveillance context where identifying individuals or assessing situations can depend on clarity. The monitor is equipped with advanced technologies that enhance image quality, such as brightness and contrast adjustments, ensuring optimal performance in various lighting conditions.

In terms of design, the VM-1201 is sleek and space-efficient, making it easy to integrate into any environment. The durable construction means it can withstand the rigors of continuous operation, making it a long-lasting addition to a surveillance system. Its flexible mounting options allow users to position the monitor in a way that best suits their monitoring needs, whether on a desktop, wall-mounted, or stand-alone.

Furthermore, the VM-1201 is user-friendly, featuring an intuitive interface and accessible controls that simplify operation. Quick access to settings and adjustments ensures that users can customize their viewing experience to align with their specific requirements.

Overall, the Speco Technologies VM-1201 combines exceptional performance, advanced technologies, and practical features that cater to the demanding needs of the security industry. Whether used in homes, retail environments, or corporate settings, this monitor delivers reliable and high-quality video monitoring solutions, making it a valuable asset for professionals and security enthusiasts alike. Its blend of functionality, durability, and user-centric design solidifies its position as a leading choice in video surveillance technology.