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Identifying Component C803 in Sony STR 11L Amplifier: Capacitor or Varistor?

krzysztofdziura90 1560 7
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  • C803 identified as a 223 pF capacitor

    #1 20839515
    krzysztofdziura90
    Level 2  
    Posts: 3
    I am diy guy that try to lears some electronics and i have to fix sony str 11l. I am currently trying to find one component. On diagram it's marked as C803 and on photo it's the green flat piece in the middle with just 223p on it. Can you help me and point out is it capacitor or something else.


    Close-up of an electronic circuit board with a green flat component marked as 223p. Section of an electronic schematic with the component labeled C803.
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  • #2 20840228
    wojtek 9007
    Level 40  
    Posts: 3939
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    Hello - the C802 330µF 25V electrolytic capacitor is missing

    Added after 34 [seconds]:

    Missing electrolytic capacitor on a circuit board.
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  • #3 20840277
    jozgo
    Level 42  
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    It is not 223p but 223, i.e. 22000pF, i.e. 22nF
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  • #4 20840441
    zybex
    Helpful for users  
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    Why did you even suspect it might be a varistor? After all, if you have a diagram, you can immediately see that it is a symbol of a capacitor. Additionally, the designation C stands for capacity. I will also add that in addition to the values mentioned above, there is also 0.022µF. It's also 223.
  • #5 20840572
    krzysztofdziura90
    Level 2  
    Posts: 3

    Thank you for clarifying. I thought that it's a varistor as that was some information I could find online according to that number. That missing capacitor is replaced with a new one but I still can't figure out why there is no voltage for the radio.
  • #6 20841123
    jozgo
    Level 42  
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    Show the entire radio diagram.
    Measure the voltages of the power supply, but start from the primary side of the transformer and the mains power cable.
  • #7 20841168
    Preskaler
    Level 40  
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    First, measure the alternating voltage (AC) at the points indicated by the green arrows.
    A section of an electronic schematic featuring a bridge rectifier D802 with green arrows indicating points for measuring an AC voltage of about 22 V.
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  • #8 20841197
    alekt77
    Level 40  
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    Preskaler wrote:
    First, measure the alternating voltage

    Let the author of the topic first look at the schematic diagram with understanding and wash the board, or at least its fragments, with isopropanol to remove the layers of dust because the inscriptions are difficult to read.
    Attachments:
    • sony_str-11l.pdf (6.93 MB) You must be logged in to download this attachment.
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around identifying component C803 in the Sony STR 11L amplifier, which is marked as 223p on the diagram. Participants clarify that C803 is a capacitor, specifically a 22nF (22000pF) component, and not a varistor as initially suspected. The conversation also touches on troubleshooting the amplifier, suggesting the measurement of voltages from the power supply and the importance of cleaning the circuit board for better visibility of markings. The missing C802 capacitor (330µF 25V) is also noted as a point of concern.
AI summary based on the discussion. May contain errors.
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