https://obrazki.elektroda.pl/7810772800_1737786071.jpg AI: Do you know the brand or model of the relays or the device they are part of? It's in Daewoo washing machine DWD-M1031
Initial assessment of available information You’ve provided images of the control board from a Daewoo DWD‑M1031 washing machine, showing two relays labeled: • MU1031_U0_6 (C/S: 7364_090305) • D‑MU1031EPB 375 (KW93E296‑R 09/03)
These part markings, especially the “MU1031” references, appear to be custom or OEM (Original Equipment Manufacturer) labels rather than standard relay brand/model numbers typically seen from major relay manufacturers (e.g., Omron, TE, Panasonic). Daewoo may contract a relay manufacturer to produce relays printed with a specific house part number.
Below is a direct answer to your question, followed by a detailed breakdown and some suggestions for further research.
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Direct answer to the question It is difficult to confirm a universally recognized “brand or model” for these relays beyond the custom-labeled part markings shown. They appear to be Daewoo‑specific (or a specially contracted relay manufacturer) using internal part codes: • MU1031_U0_6 • MU1031EPB 375
These do not match common off-the-shelf relay part numbers. To identify suitable replacements, you would need the electrical specifications—particularly coil voltage, contact ratings (amperage/voltage), and mechanical footprint/pin configuration. This information may be found in: 1. The official Daewoo (or Winia) service manual or parts lookup for the DWD‑M1031. 2. High-resolution PCB diagrams or technical documentation that might disclose coil voltage and contact current ratings.
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Detailed problem analysis In modern washing machines, relays are used to switch higher-current loads (e.g., drive motor, drain pump, heater, solenoid valves), while the electronic board sends lower-voltage signals to the relay coil. Key parameters for selecting a relay or finding a substitute include:
1. Coil Voltage – Commonly 12 V DC or 24 V DC on many washing machines. – Sometimes 5 V DC or another lower voltage if the control board is designed that way.
2. Contact Configuration – SPST (Single Pole Single Throw) or SPDT (Single Pole Double Throw).
3. Contact Current and Voltage Rating – Usually 10–30 A at up to 250 V AC for washer motors, heaters, or pumps. – Look for a marking on the relay that indicates, for example, “10 A 250 VAC” or “16 A 250 VAC.”
4. Pin Layout and Mechanical Dimensions – Must match the PCB pin footprint so the replacement can be soldered in place of the original.
Because Daewoo frequently assigns their own part labeling, the best approach is to consult a service manual or measure coil impedance/voltage on the existing relays to deduce the coil specifications, then read the contact ratings on the relay’s label or in the circuit diagram. If no direct brand reference is given, you can attempt to cross-reference these requirements against general-purpose appliance relays from Omni, Song Chuan, TE Connectivity, etc.
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Current information and trends According to recent online resources: - Some Daewoo washing machine service manuals are available for download (e.g., on Elektrotanya). - The DWD‑M1031 manual and PCB photos might give partial specifications.
However, many times the service manuals only list an internal part number. Occasionally, the contact rating or coil voltage is listed on the schematic page. If you can locate or measure those technical details, you’ll be able to find off-the-shelf equivalents.
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Supporting explanations and details - Why custom labeling? Large appliance brands often request relays in high volume from a relay maker, who prints the appliance manufacturer’s own code instead of the original brand name or part number. This eases internal inventory management but complicates repairs for end users or third-party technicians. - Testing approach: If diagnosing a faulty relay, measure coil resistance and verify if the correct coil voltage is present during operation. Check the continuity of the contacts when the relay coil is energized.
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Interdisciplinary connections - Thermal considerations: The motor, pump, or heater draws significant current, so these relays must handle power dissipation and switching stresses (electrical and mechanical). - Electrical safety: Safe replacement requires ensuring the voltage and current ratings meet or exceed the original specification.
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Ethical and legal aspects - Appliance repair: Ensure compliance with safe repair practices; if uncertain, consult a certified technician. - Warranties: Depending on your region, altering the control board without an authorized replacement component may void any remaining warranty coverage or compliance labels.
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Practical guidelines 1. Visual inspection: Look for any rating data on the relay’s top or side. Sometimes, the contact rating is faintly stamped. 2. Service manuals: Obtain the Daewoo DWD‑M1031 service manual from resources (e.g., Elektrotanya). 3. Measure coil voltage: If you have a safe way to measure the machine while operating, check the coil supply line from the PCB (often clearer in the schematic). 4. Replacement: If direct OEM relays are unavailable, select a known brand relay with the same coil specs (DC voltage and coil power), contact arrangement (SPST, SPDT), contact rating (Amp/Volt), and PCB footprint dimensions.
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Possible disclaimers or additional notes - Safety caution: Diagnosing and replacing relays on a washing machine PCB involves high voltages. Ensure the appliance is fully disconnected from mains before servicing. - Validate with test: After replacement, run a short test cycle to confirm correct operation (fill, spin, drain, etc.).
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Suggestions for further research - Consult the Daewoo (Winia) DWD‑M1031 service manual schematics. - Check electronics forums like Elektroda.com or other appliance repair communities for references to these part numbers. - Explore general-purpose PCB relays from reputable brands (Omron G2R Series, TE OJ/OJE Series, Finder Series, etc.) once you know coil and contact specs.
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Brief summary In short, the relays in a Daewoo DWD‑M1031 washing machine are most likely OEM-labeled components (MU1031_U0_6 and MU1031EPB 375). Determining the exact brand and specifications requires looking at the control board schematic or verifying coil voltage and contact ratings. Suitable replacements must match electrical and mechanical parameters. Refer to Daewoo service documentation or measure key relay characteristics to ensure safe and effective replacement.
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Questions for the user 1. Are there any voltage/current markings on the side of these relays or visible on the PCB traces that indicate coil voltage and load rating? 2. Do you have access to a multimeter or any diagnostic tools to measure coils and confirm the relays’ function? 3. Are you experiencing a specific fault (e.g., no spin, no drain, no heat) that suggests one of these relays might have failed?
Feel free to share any additional details or findings so we can narrow down specifications and point you toward an appropriate replacement.
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