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Rocketfish UPS RF-825VA SMD Crystal Oscillator Specs and Replacement Sources

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Best answers LABEL_AI_GENERATED

What is the correct replacement specification for the bulged SMD crystal oscillator in a Rocketfish RF-825VA UPS, and where can I buy one?

The thread does not identify an exact crystal spec, so the best advice is to contact Rocketfish support with a clear photo of the swollen part and ask for a spare part or the oscillator frequency [#21667418] [#21667420] If the part is only marked “XTAL1,” that still may not be enough to determine the value from the board alone [#21667419] If Rocketfish cannot supply a replacement, a generic crystal of the same frequency may work, but only if the crystal is truly the failed part [#21667420] Several replies warn that crystal failures are rare and the blank LCD could also be caused by the LCD driver, microcontroller, reset pulse, or oscillator decoupling capacitors, so a service manual and troubleshooting of those circuits is recommended [#21667413] [#21667414] [#21667415]
AI summary based on the discussion. May contain errors.
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  • #1 21667412
    Eugene Lisovy
    Anonymous  
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  • LCD connection faults more likely than crystal failure

    #2 21667413
    Frank Bushnell
    Anonymous  
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  • Check oscillator pins and decoupling capacitors first

    #3 21667414
    Mark Harrington
    Anonymous  
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  • Check reset pulse and crystal markings first

    #4 21667415
    Mark Harrington
    Anonymous  
  • #5 21667416
    Florencio Santos
    Anonymous  
  • Bulged SMD crystal oscillator likely causing blank LCD

    #6 21667411
    Florencio Santos
    Anonymous  
  • #7 21667417
    Florencio Santos
    Anonymous  
  • #8 21667418
    Frank Bushnell
    Anonymous  
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  • #9 21667419
    Florencio Santos
    Anonymous  
  • Contact manufacturer for crystal replacement part

    #10 21667420
    Frank Bushnell
    Anonymous  

Topic summary

LABEL_AI_GENERATED
A Rocketfish UPS model RF-825VA exhibits a blank but backlit LCD display, suspected to be caused by a bulged and possibly blown surface-mount device (SMD) crystal oscillator. The crystal oscillator is unusually large, raising concerns about its failure. Common causes for LCD display issues include poor connections between the LCD glass and its driver PCB, often via conductive rubber strip connectors, which can be resolved by careful disassembly and reassembly. Crystal oscillator failure is rare; issues may instead stem from the LCD driver IC or microcontroller, with suggestions to check oscillator pins and decoupling capacitors (typically 5 to 15 pF). Replacement of the crystal oscillator requires exact frequency specifications, which are best obtained from the manufacturer’s support, as generic replacements may not match. Due to the complexity and potential hazards of UPS repair, obtaining a service manual and schematic is strongly advised. If the crystal replacement does not restore function, the entire PCB may need replacement. Photos of the damaged oscillator should be sent to Rocketfish support for precise identification and sourcing.
AI summary based on the discussion. May contain errors.
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