3.1.5If driving pulses at U901 pin6 and drain of Q901 are correct but voltage at U901 pin 7 low than threshold voltage --causing U901 to stop and restart periodically, check and repair following circuits. Power transformer T901 bad; D903 short-circuit/opened.

3.2No Display, power output normal.

3.2.1Check and fix FBT B+：If no B+（27.5V）on pin2 of FBT replace D906, C916.

3.2.2Check driving output voltage：0 or very low check and replace Q402, Q401.

3.2.3Power off monitor. Check yoke connection. Use multimeter to check D501, D502, D401, Fix if any is bad.

3.2.4Power on, check voltage at pin10 of U401 if no voltage, check and fix Vertical circuit B+, D904.

3.3No Display (No Raster).

3.3.1Check yoke connection.

3.3.2Check CRT board and verify CRT heater is on.

3.3.3Check G2 voltage if fail, check and fix FBT or D502.

3.3.4Check K (cathode) voltage at negative of D501 about 150V, If no voltage output Check and replace D501 and C501.

3.4Vertical Deflection Failure

3.4.1Vertical display can't be held--check and fix：U401.

3.4.2Vertical raster abnormal (one horizontal line, size too small or fold back on top / bottom) -- check and fix：14V supply at U402 pin2, if has voltage check and fix U301.

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Speco Technologies VM-1201 2No Display, power output normal, 3No Display No Raster, 4Vertical Deflection Failure
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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.
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