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Summary of Contents for UNI-T UDP6900 Series
- Page 1 Service Manual UDP6900 Series Digital Control Power Supply...
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Page 2: Warranty Service
Foreword Dear Users, Hello! Thank you for choosing this brand new UNI-T instrument. In order to use this instrument safely and correctly, please read this manual thoroughly, especially the Safety Requirements part. After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device, for future reference. - Page 3 If the products is shipped domestically to the purchase receipt of the original purchaser. If the product is shipped to the location of the UNI-T service center, UNI-T shall pay the return shipping fee. If the product is sent to any other location, the customer shall be responsible for all shipping, duties, taxes, and any other expenses.
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Page 4: Safety Information
Users must follow the following conventional safety precautions in operation, service and maintenance of this device. UNI-T will not be liable for any personal safety and property loss Warning caused by the user’s failure to follow the following safety precautions. This device is designed for professional users and responsible organizations for measurement purposes. - Page 5 Service Manual UDP6900 Series Digital Control Power Supply “Warning” indicates the presence of a hazard. It reminds users to pay attention to a certain operation process, operation method or similar. Product damage or loss of important data may occur if the rules in the Warning “Warning”...
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Page 6: Safety Requirements
Service Manual UDP6900 Series Digital Control Power Supply Three-phase public power unit and outdoor power supply line equipment. Equipment designed to “initial connection”, such as power distribution CAT Ⅳ system of power station, power instrument, front-end overload protection, and any outdoor transmission line. - Page 7 Caution Abnormality If this device may be faulty, please contact the authorized maintenance personnel of UNI-T for testing. Any maintenance, adjustment or parts replacement must be done by the relevant personnel of UNI-T. Cooling Do not block the ventilation holes at the side and back of this device;...
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Page 8: Environmental Condition
Service Manual UDP6900 Series Digital Control Power Supply Keep clean and Please take actions to avoid dust or moisture in the air affecting the performance of this device. Please keep the product surface clean and dry. Note The recommended calibration period is one year. Calibration should only be carried out Calibration by qualified personnel. -
Page 9: Electrostatic Protection
Ensure all the instruments are properly grounded to prevent the accumulation of static Serial Number and System Information UNI-T continually improves the performance, availability, and reliability of its products. UNI-T service personnel have access to check the serial number and system information. -
Page 10: Operation Information
Service Manual UDP6900 Series Digital Control Power Supply 2. Introduction Supporting Product This manual contains the service information for UDP6922B, UDP6932B, UDP6933B, UDP6942B, UDP6952B, and UDP6953B. Operation Information The instrument information of installation, operation and remote control see User’s Manual. -
Page 11: Rear Module
Service Manual UDP6900 Series Digital Control Power Supply 3. Structure Rear Module Accessory List Article Description KM3X8 quincunx Use T10 quincunx screwdriver to remove 4 screws screw Rear module Case frame Handle Instruments.uni-trend.com 11 / 29... -
Page 12: Outer Frame
Service Manual UDP6900 Series Digital Control Power Supply Accessory List Article Description Handle Pull the handle to both sides by slightly force, rotate vertically along the direction of the host panel to the top of the machine, and then pull away... -
Page 13: Control Board
Service Manual UDP6900 Series Digital Control Power Supply Accessory List Article Description KM3X6 quincunx Use T10 quincunx screwdriver to remove 4 screws screws Pull to the back of the case Rear panel Case frame Control Board Accessory List Article Description... -
Page 14: Maintenance
Service Manual UDP6900 Series Digital Control Power Supply Case frame Accessory List Article Description PM3X6 quincunx Use T10 quincunx screwdriver to remove 9 screws screws PCB main board Power PCB and barrier plate of machine tool Barrier plate of cooling... -
Page 15: Inspection And Cleaning
Service Manual UDP6900 Series Digital Control Power Supply Before servicing this product, read the General Safety Summary and the Service Safety Summary at the front of the manual, as well as the following ESD information. Caution: Electrostatic discharge (ESD) can damage any semiconductor component in this instrument. -
Page 16: Screen Cleaning
Model and serial number of the instrument Reason for returning A complete description of the service request Mark the address of the UNI-T Service Center and also your own return address on the shipping carton in two prominent locations. Instruments.uni-trend.com 16 / 29... -
Page 17: Removal And Replacement
Service Manual UDP6900 Series Digital Control Power Supply 5. Removal and Replacement Disassembly/Replacement Tool Use the tool is shown in the following table to replace the module of the digital power supply. Tool Name Description Quincunx screwdriver The model refers to the removal steps... - Page 18 Service Manual UDP6900 Series Digital Control Power Supply Model Specification of Fuse (Input 110 VAC~220 VAC） UDP6922B 250V/F3.15A UDP6932B 250V/F5A UDP6933B 250V/F5A UDP6942B 250V/F6.3A UDP6952B 250V/F10A UDP6953B 250V/F10A 2) After the replacement, reinstate the fuse box as shown in the following figure.
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Page 19: Remove Rear Panel
Service Manual UDP6900 Series Digital Control Power Supply Remove Rear Panel Take UDP6932 as an example, dismantle the machine, and pay attention to keep the removed screws and components during the disassembly process. Prerequisites To prevent electrostatic damage to internal devices through the interface of the instrument, ear ... - Page 20 Service Manual UDP6900 Series Digital Control Power Supply Take out the case, as shown in the following figure. Reverse execute the above step to reinstate. Remove Rear Modules Cut the straps at first, and then pull out the signal wires connected to the PCB and rear panel. (The strap location and quantity of some models are different, depending on the specific situation.
- Page 21 Service Manual UDP6900 Series Digital Control Power Supply Use T10 quincunx screwdriver to remove the grounding screw on the rear panel, pull out the power wire connected to the PCB (the ground wire of UDP6952 and UDP6953 are in the middle of the PCB), as shown in the following figure.
- Page 22 Service Manual UDP6900 Series Digital Control Power Supply Pull out the double-head wiring and fan wiring on the PCB (note: the terminal on the PCB should be held down first, and then pull out the wire to prevent the terminal from being pulled off. This method is used for similar interfaces in the following, such as removing the fan wire interface and panel wire interface in the surface cover.) The rear cover can be removed as shown in the following figure.
- Page 23 Service Manual UDP6900 Series Digital Control Power Supply The rear components as shown in the following figure. Reverse execute the above step to reinstate. Remove Surface Cover Pull out the front cover wiring on the PCB and use T20 quincunx screwdriver to remove 2 screws securing between the front cover and PCB, as shown in the following figure.
- Page 24 Service Manual UDP6900 Series Digital Control Power Supply Cut the strap of magnet ring strap, use T10 quincunx screwdriver to remove the screw securing the ground wire of front cover, as shown in the following figure. Use T10 quincunx screwdriver to remove 4 screws on the edge of front cover, as shown in the following figure.
- Page 25 Service Manual UDP6900 Series Digital Control Power Supply Push outward slightly, shake the front cover up and down slightly in a small amplitude, and remove the front cover modules (during the process, pay attention not to shake too much, resulting in breakage of the switch button.)
- Page 26 Service Manual UDP6900 Series Digital Control Power Supply Take out the key PCB, button, and screen module to complete the disassembly of front components. Reverse execute the above step to reinstate. Explanation: The removal of the above components allows for the replacement of the cap of encoder knob, silicone buttons, display screen, and the repair of key PCB.
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Page 27: Troubleshooting
The information and procedure contains in this section can help you determine whether the instrument has problem. If the power is failure, please send the instrument back to UNI-T Service Center for repair. Because the user cannot replace the internal electronic components or modules. -
Page 28: Troubleshooting Flowchart
Service Manual UDP6900 Series Digital Control Power Supply Power cable is not inserted or has defective The instrument cannot power on Fuse is blown Power module is fault Screen is blank or displays stripe LCD or display circuit is fault ... -
Page 29: After Maintenance
If the product proves defective during the warranty period, UNI-T will repair and replace it as detailed in the warranty statement. To arrange for repairs or to obtain a copy of the full warranty statement, please contact the nearest UNI-T sales and repair office.
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