Author Topic: R42 on PCB A immediately smoking after powering up

November 04, 2023, 01:23:00 AM
Read 266 times

Muckel

  • Newbie
  • *
  • Posts: 2
  • Karma: +0/-0
    • View Profile
Hi there,
we just finished soldering the CP4500 a few days ago... now when we power it up R42 starts smoking. We double checked every capacitor, soldering joint, OP's and checked if every diode is in the right direction.
But now we ran out of ideas.

We have revision 1.4


Thanks in advance

Max and Adrian

https://i.imgur.com/EbciucI.jpg[/img]"]
« Last Edit: November 04, 2023, 01:26:54 AM by Muckel »

November 04, 2023, 11:25:28 AM
Reply #1

JPK

  • Administrator
  • Hero Member
  • *****
  • Posts: 1015
  • Karma: +30/-0
    • View Profile
Unplug all IC's,
Disconnect the meter connector CN4,
Disconnect the front PCB,
Power on

If still the same, look for solder bridges.
If not, step back on at a time, front PCB, meter, ...
JPK

November 06, 2023, 09:45:30 PM
Reply #2

Muckel

  • Newbie
  • *
  • Posts: 2
  • Karma: +0/-0
    • View Profile
Hey there and thanks.

So our pcb A and front pcb are fine. The problem is the vu-meter. There is a bridge between the blue and black wire. Should there be a bridge ? Maybe it's a production issue. Is it possible to order a new vu-meter ?

Many thanks
  

November 07, 2023, 03:22:02 PM
Reply #3

JPK

  • Administrator
  • Hero Member
  • *****
  • Posts: 1015
  • Karma: +30/-0
    • View Profile
Please contact me here for a replacement.
JPK