Recently, a company in Beijing sent the Agilent pattern generator 81134A for repair, and the customer feedback screen was black, and the instrument was preliminarily tested, and it was determined that the fault described by the customer was basically the same. In this issue, we will share this repair case with you.
Here's how the Agilent 81134A is repaired.
Agilent Pattern Generator 81134A Screen Failure Black Screen Repair
1. Pattern generator maintenance model: Agilent 81134A.
2. Repair failure: The screen is black and the signal cannot be amplified.
3. Fault detection: from the fault reported by the customer for repair, it seems to be a power supply problem or a problem with the screen, the light on the boot button is lit up after powering on, and the sound of the instrument self-test can be heard, the preliminary judgment is that it should be a problem with the screen, the external display can see the pattern on the display, and the self-calibration OK, the characters on the screen can be vaguely seen by illuminating the screen with a flashlight, and the engineer disassembles the machine after the power is off, and conducts detailed testing of the internal components. The dust inside the instrument was serious, and it was found that there were traces of burn-through on the backlight driver board inside.
4. Maintenance measures: replace the backlight driver board, light up the screen normally when powered on, and perform self-inspection. All of them are tested. And the whole machine is tested on the instrument, the internal dust is cleaned, the self-calibration passes, the test signal is normal, and the indicators are qualified.
Antai maintenance comprehensive inspection to confirm that there is no problem with the instrument and return it to the customer.
When there is a problem, be sure to find a professional and reliable pattern generator repair center for after-sales maintenance. The following is a copy of the main features of 81134A compiled by Antai Maintenance Center:
The new Keysight 81134A sets a new performance benchmark for high-speed applications that require multiple output channels or multilevel signaling. When time and performance are critical to the application, the 81134A enables precise and in-depth characterization of devices such as receivers or backplanes with ultra-fast rise times and low intrinsic jitter.
1.Clock and data signals are distorted.
2.The graphical user interface gives you quick access to all relevant parameters.
3.Ultra-fast jump times.
4.PRBS can be generated on a hardware basis and a pattern on a memory basis.
All-round control of testing for accuracy**
The versatile variable crosspoint and jitter injection capabilities make the 81134A ideal for signal integrity testing.
Complements the capabilities of Keysight's 54850A Infiniium high-performance oscilloscopes and 86100C Infiniium DCA-J wide-bandwidth oscilloscopes.
Delay control inputs and variable crosspoint capabilities facilitate quick and easy signal integrity measurements, including true-to-life signals.
Direct mode allows you to change the frequency without differential pressure or burrs.