Results 1 to 2 of 2

Thread: Fender Passport Event

  1. #1
    Senior Member
    Join Date
    Jul 2007
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0

    Fender Passport Event

    I have the Event version of the Passport but its similar to all the Passports. The output on both speakers are very weak. It appears everything on the mixer and preamp side work properly including the master volume, but the most sound that comes out of the speakers is barely a whisper in volume. I'm about to dive in with a meter and schematic, but since both sides are effected I'm guessing it should be easy to track down the problem. My first guess is somewhere in the power supply section not properly powering the power amp, but since its a switching power supply, I don't look forward to troubleshooting that.
    Here's a link to the service manual:

    0 Not allowed! Not allowed!

  2. #2
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Lansing, Michigan, USA
    Thumbs Up/Down
    Received: 588/1
    Given: 0/0
    I doubt the SMPS is bad. If it were, nothing would work.

    I see output of mixer shares an IC at the master volume stage, plus another shared IC as a buffer the stage after. Either could do this. But I also see mute transistors before the master volume stages. If those are stuck on, you signal dies.

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Fender passport repair
    By fredcapo in forum Maintenance, Troubleshooting & Repair
    Replies: 21
    Last Post: 01-05-2017, 09:47 PM
  2. Fender Passport PD150 Repair
    By neatneat29 in forum Maintenance, Troubleshooting & Repair
    Replies: 11
    Last Post: 02-19-2015, 06:30 AM
  3. Fender Passport biasing
    By Bob W. in forum Music Electronics
    Replies: 12
    Last Post: 10-03-2014, 03:28 AM
  4. Fender Passport 250
    By lowell in forum Maintenance, Troubleshooting & Repair
    Replies: 8
    Last Post: 05-17-2012, 11:49 PM
  5. Fender Passport 500
    By rockwik in forum Music Electronics
    Replies: 13
    Last Post: 05-31-2010, 04:42 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts