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Squier Champ 25GR No Output

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  • #1

    Squier Champ 25GR No Output

    This amp uses a uPC1188H as the final output IC. Plenty available online and eBay. I know some replacement ICs can be duds, any known issue with sourcing these?

    I have V at the IC and signal at the input, no output signal. As I was trying to get my probe on the pins I noticed that all the pins are loose from the IC housing. If you push down on the circuit board the pins move away from the IC housing. So I assume somehow they all broke away from the housing and the IC needs to be replaced.

    Just looking for confirmation. Thank you

    Schematic in service manual attached.

    fender_frontman-25r_sm.pdf

    Click image for larger version Name: IMG_20230901_191331456.jpg Views: 354 Size: 1.19 MB ID: 985570

    Tags: None
  • #2
    Most of the cheap upc1188 online and on ebay are coming from China and will be fake or modern 'reproductions' that do not meet original specs. Chances are they will work for a while but blow up when pushed.
    BD Ent. are a reliable supplier and I would trust these before any of the cheap options: https://www.bdent.com/upc1188h-nec-a...d-circuit.html

    edit: these from Ness electronics seem legit as well: https://www.nesselectronics.com/products/eltupc1188h
    Originally posted by Enzo
    I have a sign in my shop that says, "Never think up reasons not to check something."


    ​

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    • #3
      Already placed an order from China. The pic they have look the same, NEC Japan, etc. Hopefully they are okay.

      Thank you

      Comment

      • #4
        They are counterfeit.
        Originally posted by Enzo
        I have a sign in my shop that says, "Never think up reasons not to check something."


        ​

        Comment

        • #5
          Don't forget AudioLabs of Ga 3 in stock and guaranteed.
          nosaj
          Audio lab of Ga
          http://audiolabga.com
          Speakers, woofers, tweeters, recone, reuild, service, atlanta, transistors, ic, caps, crossovers, professional loudspeaker systems, amps, Eminence speaker parts, Eminence, JBL speakers, JBL, Woofers, EV, Woofer, B&C, Woofers, speaker, speakers,Tang Band, Eminence speakers, Peavey, EV, Black Widow, Electro Voice, Dayton Audio, Audio Technica, bass speakers, subwoofers, loudspeaker, Penn Elcom, loudspeakers, Crown, Shure, Neutrik, Pioneer, Connectors, Furman, Tascam, Electro-voice, Selenium, Crown, Atlas Sound, Behringer, amplifier,amp, transducer, Pioneer, hdmi cables, Shure, Furman, Pioneer , hd antennas, buffalo, ir, Crossover parts, speaker components, crossover, Crossovers, tweeter, Tweeters, compression driver, drivers, alpha, beta, gamma, delta, kappa, kilomax, sigma, omega, Bass, sub, midrange, planar tweeter, Jasper Jig, NTE, , musical instrument, PA, sound reinforcement, Pro Sound, Prosound, tweeter, tweeters, midrange, Sherwood, guitar amplifiers, guitar speakers, amplifiers, speaker plans, speaker cabinets, hdmi, Bass Guitars, impedance, live sound, wired home, nuvo, simplese, music industry, speaker manufacturers, speaker builders, speaker sales, speaker distributors, music equipment, music dealers, music distributors, music stores, music products, organs, pianos, public address, microphones, NAMM, power amplifiers, recording equipment, Keyboards, Ungar , soldering, Karaoke, Disc Jockey, Ohio, Music, Carol Cable, Monster Cable, speaker wire, Bands, microphones, WBT, banana, PA systems, ported cabinets, Sennheiser, Headphones, Sanus, TIC, Rock Speaker, Titanic sub, transducers, subwoofers
          soldering stuff that's broken, breaking stuff that works, Yeah!
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          • #6
            Will let you all know how it goes. Thank you

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            • #7
              China order came in. I installed the new one and the amp is working. Are counterfeits bad right away? Hopefully this is a good batch.

              The amp must have taken a good hit or fall because all the legs were sheared on the old chip. Also including a pic of the new one installed.

              Thank you all.


              Click image for larger version Name: IMG_20230929_150604471.jpg Views: 263 Size: 567.5 KB ID: 986789 Click image for larger version Name: IMG_20230929_163848864.jpg Views: 267 Size: 722.5 KB ID: 986790 Click image for larger version Name: IMG_20230929_150609212.jpg Views: 260 Size: 921.7 KB ID: 986791

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              • #8
                Or someone else already troubleshot it to the output ic and cut the pins to check the rest of the circuit?
                nosaj
                soldering stuff that's broken, breaking stuff that works, Yeah!

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                • #9
                  Originally posted by nosaj View Post
                  Or someone else already troubleshot it to the output ic and cut the pins to check the rest of the circuit?
                  nosaj
                  Right

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