Wireless Portable Fishing Sonar Float (100m Depth)

After receiving our company's bulk delivery of 200 X2000 fishing sonars, the customer encountered during on-site installation and commissioning that a large number of units were incompatible with the shipboard power and frequently rebooted, and some units exhibited noise and frame drops on the echo display, preventing the customer from conducting large-scale operations during the scheduled fishing season. The customer requires at least 80% device availability to be restored within 48 hours to avoid severe production losses.

Our company dispatched an emergency team consisting of 2 senior field engineers and 1 spare-parts technician, arriving at the customer's site within 36 hours of notification. On-site work steps: 1) Conducted batch power compatibility tests and confirmed the issue was a conflict between the shipboard power fluctuations and the X2000's default power filtering parameters; 2) Using a portable oscilloscope and load simulator, adjusted the device's internal power filter parameters and replaced 3 damaged power modules; 3) For 40 units exhibiting echo noise, upgraded firmware to the latest stable version and recalibrated ultrasonic transducer parameters; 4) To prevent recurrence from subsequent fluctuations, provided the customer with a set of recommendations for installing shipboard power filtration (including filter models and grounding improvement plans) and assisted them in procuring two temporary voltage stabilizers for on-site use; 5) Recorded each device's serial number, fault type, and corrective actions, generated a batch acceptance report, and conducted on-site training for the customer's technicians on routine inspection methods and emergency procedures.

After the customer purchased 200 fish-finding sonars/fish finders in a one-time procurement, the units were installed but operators were unfamiliar with the device functions, software settings, and bulk data export procedures, resulting in inability to use them efficiently during the scheduled fishing season and affecting project progress and subsequent order rhythm. The customer requests a concentrated training within one week after delivery for 30 frontline operators and 5 maintenance engineers, and expects the training to include on-site operation demonstrations, common fault troubleshooting procedures, and guidance for bulk firmware upgrades.

1) Rapid response: After receiving the customer's training request, arrange a training team composed of two senior product engineers and one after-sales project manager to go on-site within 48 hours (customer information masked as ***). 2) Training preparation: Before departure, request from the customer the equipment list, software versions, and network environment information (all marked as ***), and prepare five compatible demo devices, presentation materials, bilingual training manuals in Chinese and English, a troubleshooting checklist, and batch upgrade scripts. 3) Training content and allocation: On the first day morning, explain product functions and interface; in the afternoon, perform on-site installation, calibration, and parameter configuration. On the second day, conduct practical exercises (group-rotating training to ensure 30 operators each complete at least 3 hands-on sessions), and simultaneously provide in-depth troubleshooting, log collection, and batch firmware upgrade process training for five maintenance engineers. 4) Tools and support: Provide laptops for on-site demonstrations, Ethernet switch, and mobile hotspot to adapt to the customer's *** vessel/station network environment. The training team will provide a remote support channel during training (dedicated WeChat group/Teams) and arrange follow-up visits within 48 hours. 5) Deliverables: At the end of training, conduct theoretical and practical assessments of participants, generate assessment reports and a list of nonconformities for rectification, and deliver a USB drive and cloud links containing the operation manual, troubleshooting checklist, and batch upgrade scripts (customer and device information masked as ***).

After receiving the first batch of 500 fish-finding sonar devices, most units could not complete the firmware bulk upgrade on site using the company's provided bulk configuration tool. During the upgrade the devices repeatedly rebooted or remained stalled for long periods at 40%–60% progress. The customer is a trader supplying a chain fisheries company and requires all devices to be upgraded within two weeks to ship before the seasonal sales peak. The devices are numerous and stored in a single warehouse, so returning units to the factory one by one is not feasible.

1) Remote diagnosis: After receiving customer feedback, the technical support team immediately scheduled a remote meeting and requested the customer provide upgrade logs, the batch configuration tool version number, device batch numbers, and a network topology screenshot. By analyzing the upgrade logs, it was confirmed that the firmware verification module on a specific device batch (SN prefix ***) conflicted with the concurrent upgrade threads of the existing bulk tool, causing verification timeouts. 2) Temporary workaround: Guided the customer to reduce the bulk upgrade concurrent thread count from the default 20 to 5 in the warehouse network environment, and enabled grouped upgrades in the upgrade tool (50 devices per group) to reduce concurrent connection load. Provided a step-by-step operation script and configuration template (including security verification steps) for the customer to run. 3) Patch release and remote deployment: Concurrently, the R&D team developed a firmware patch for the affected device batch within 48 hours to correct the firmware verification timeout logic under high concurrency. After secure signing, we remotely assisted the customer in pushing the patch using the grouped upgrade method and monitored the real-time logs of the upgrade process. 4) Verification and regression testing: After the upgrade completed, guided the customer to perform bulk functional tests (including loopback playback, GPS synchronization, power consumption testing, etc.), and requested the customer upload the test results and logs of 20 randomly sampled devices to our cloud for regression validation. 5) Documentation and training: Compiled a root-cause report and updated the operation manual, and conducted a 1.5-hour remote training session for the customer’s warehouse operators explaining the new tool configuration, grouped upgrade process, and common troubleshooting steps.

After receiving a shipment of 1,200 fishing sonar units, the customer found that about 9% (108 units) exhibited failures during initial power-up tests, such as failing to power on, screen flickering, and touch controls not responding. All devices share the same firmware and hardware versions. The customer, ***, is preparing to distribute in the North American market; if this issue cannot be resolved quickly, it will affect subsequent large orders and the marketing plan.

1) First remotely confirm the fault symptoms with the customer (***) and collect fault logs, serial numbers, and factory batch information; 2) Our technical team traced the production records of the faulty serial numbers in the internal database and found the problem concentrated in a change to the soldering process for the display driver ICs in the same production batch; 3) Initiate a rapid-response repair process: air-ship the customer’s faulty units (20 representative units, IDs ***) back to the factory for detailed inspection, and meanwhile guide the customer to sort the remaining faulty devices in the local warehouse by symptom and temporarily label and isolate them; 4) After completing prototype repairs and reinforcement process validation at the factory, establish standard repair procedures and testing specifications, and prepare standardized repair kits for the customer (including replacement display driver ICs, display assemblies, comprehensive functional testing tools, and operation manuals); 5) We will dispatch two engineers to the customer's site to assist with on-site accompanying repairs for the first 300 units and to train the local repair team (including replacement procedures, ESD protection, soldering temperature profiles, and a 72-hour burn-in test process); 6) To ensure batch quality control, perform sampling tests on every batch of 100 units after repair (including power-on rate, touch sensitivity, RF testing, and burn-in testing), and provide a 6-month extended warranty covering the repaired parts for the entire batch; 7) To compensate the customer for market losses caused by delays, provide corresponding discounts per contract terms and deliver a small batch of sample units equivalent in value to 30 devices to support the customer's marketing activities.